Commit | Line | Data |
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a3da1d95 GE |
1 | /*************************************************************************** |
2 | ftdi.c - description | |
3 | ------------------- | |
4 | begin : Fri Apr 4 2003 | |
5 | copyright : (C) 2003 by Intra2net AG | |
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 |
b5ec1820 TJ |
21 | http://www.intra2net.com/de/produkte/opensource/ftdi/ |
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 | ||
98452d97 | 31 | #include <usb.h> |
a8f46ddc | 32 | #include <string.h> |
d2f10023 | 33 | #include <errno.h> |
4c9e3812 | 34 | #include <sys/ioctl.h> |
0e302db6 | 35 | |
98452d97 | 36 | #include "ftdi.h" |
a3da1d95 | 37 | |
21abaf2e | 38 | #define ftdi_error_return(code, str) do { \ |
2f73e59f | 39 | ftdi->error_str = str; \ |
21abaf2e | 40 | return code; \ |
d2f10023 | 41 | } while(0); |
c3d95b87 TJ |
42 | |
43 | ||
1941414d TJ |
44 | /** |
45 | Initializes a ftdi_context. | |
4837f98a | 46 | |
1941414d | 47 | \param ftdi pointer to ftdi_context |
4837f98a | 48 | |
1941414d TJ |
49 | \retval 0: all fine |
50 | \retval -1: couldn't allocate read buffer | |
51 | ||
52 | \remark This should be called before all functions | |
948f9ada | 53 | */ |
a8f46ddc TJ |
54 | int ftdi_init(struct ftdi_context *ftdi) |
55 | { | |
98452d97 | 56 | ftdi->usb_dev = NULL; |
545820ce TJ |
57 | ftdi->usb_read_timeout = 5000; |
58 | ftdi->usb_write_timeout = 5000; | |
a3da1d95 | 59 | |
53ad271d | 60 | ftdi->type = TYPE_BM; /* chip type */ |
a3da1d95 GE |
61 | ftdi->baudrate = -1; |
62 | ftdi->bitbang_enabled = 0; | |
63 | ||
948f9ada TJ |
64 | ftdi->readbuffer = NULL; |
65 | ftdi->readbuffer_offset = 0; | |
66 | ftdi->readbuffer_remaining = 0; | |
67 | ftdi->writebuffer_chunksize = 4096; | |
68 | ||
545820ce TJ |
69 | ftdi->interface = 0; |
70 | ftdi->index = 0; | |
71 | ftdi->in_ep = 0x02; | |
72 | ftdi->out_ep = 0x81; | |
3119537f | 73 | ftdi->bitbang_mode = 1; /* 1: Normal bitbang mode, 2: SPI bitbang mode */ |
53ad271d | 74 | |
a3da1d95 GE |
75 | ftdi->error_str = NULL; |
76 | ||
1c733d33 TJ |
77 | /* All fine. Now allocate the readbuffer */ |
78 | return ftdi_read_data_set_chunksize(ftdi, 4096); | |
948f9ada | 79 | } |
4837f98a | 80 | |
1941414d TJ |
81 | /** |
82 | Open selected channels on a chip, otherwise use first channel. | |
83 | ||
84 | \param ftdi pointer to ftdi_context | |
85 | \param interface Interface to use for FT2232C chips. | |
86 | ||
87 | \retval 0: all fine | |
88 | \retval -1: unknown interface | |
c4446c36 | 89 | */ |
0ce2f5fa | 90 | int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface) |
c4446c36 TJ |
91 | { |
92 | switch (interface) { | |
93 | case INTERFACE_ANY: | |
94 | case INTERFACE_A: | |
0ce2f5fa | 95 | /* ftdi_usb_open_desc cares to set the right index, depending on the found chip */ |
c4446c36 TJ |
96 | break; |
97 | case INTERFACE_B: | |
98 | ftdi->interface = 1; | |
99 | ftdi->index = INTERFACE_B; | |
100 | ftdi->in_ep = 0x04; | |
101 | ftdi->out_ep = 0x83; | |
102 | break; | |
103 | default: | |
104 | ftdi_error_return(-1, "Unknown interface"); | |
105 | } | |
106 | return 0; | |
107 | } | |
948f9ada | 108 | |
1941414d TJ |
109 | /** |
110 | Deinitializes a ftdi_context. | |
4837f98a | 111 | |
1941414d | 112 | \param ftdi pointer to ftdi_context |
4837f98a | 113 | */ |
a8f46ddc TJ |
114 | void ftdi_deinit(struct ftdi_context *ftdi) |
115 | { | |
948f9ada | 116 | if (ftdi->readbuffer != NULL) { |
d9f0cce7 TJ |
117 | free(ftdi->readbuffer); |
118 | ftdi->readbuffer = NULL; | |
948f9ada | 119 | } |
a3da1d95 GE |
120 | } |
121 | ||
1941414d TJ |
122 | /** |
123 | Use an already open libusb device. | |
124 | ||
125 | \param ftdi pointer to ftdi_context | |
126 | \param usb libusb usb_dev_handle to use | |
4837f98a | 127 | */ |
a8f46ddc TJ |
128 | void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb) |
129 | { | |
98452d97 TJ |
130 | ftdi->usb_dev = usb; |
131 | } | |
132 | ||
133 | ||
1941414d TJ |
134 | /** |
135 | Finds all ftdi devices on the usb bus. Creates a new ftdi_device_list which | |
136 | needs to be deallocated by ftdi_list_free() after use. | |
137 | ||
138 | \param ftdi pointer to ftdi_context | |
139 | \param devlist Pointer where to store list of found devices | |
140 | \param vendor Vendor ID to search for | |
141 | \param product Product ID to search for | |
edb82cbf | 142 | |
1941414d TJ |
143 | \retval >0: number of devices found |
144 | \retval -1: usb_find_busses() failed | |
145 | \retval -2: usb_find_devices() failed | |
146 | \retval -3: out of memory | |
edb82cbf | 147 | */ |
d2f10023 | 148 | int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product) |
edb82cbf TJ |
149 | { |
150 | struct ftdi_device_list **curdev; | |
151 | struct usb_bus *bus; | |
152 | struct usb_device *dev; | |
153 | int count = 0; | |
d2f10023 | 154 | |
edb82cbf TJ |
155 | usb_init(); |
156 | if (usb_find_busses() < 0) | |
157 | ftdi_error_return(-1, "usb_find_busses() failed"); | |
158 | if (usb_find_devices() < 0) | |
159 | ftdi_error_return(-2, "usb_find_devices() failed"); | |
160 | ||
161 | curdev = devlist; | |
6db32169 | 162 | *curdev = NULL; |
edb82cbf TJ |
163 | for (bus = usb_busses; bus; bus = bus->next) { |
164 | for (dev = bus->devices; dev; dev = dev->next) { | |
165 | if (dev->descriptor.idVendor == vendor | |
166 | && dev->descriptor.idProduct == product) | |
167 | { | |
168 | *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list)); | |
169 | if (!*curdev) | |
170 | ftdi_error_return(-3, "out of memory"); | |
d2f10023 | 171 | |
edb82cbf TJ |
172 | (*curdev)->next = NULL; |
173 | (*curdev)->dev = dev; | |
174 | ||
175 | curdev = &(*curdev)->next; | |
176 | count++; | |
177 | } | |
178 | } | |
179 | } | |
d2f10023 | 180 | |
edb82cbf TJ |
181 | return count; |
182 | } | |
183 | ||
1941414d TJ |
184 | /** |
185 | Frees a usb device list. | |
edb82cbf | 186 | |
1941414d | 187 | \param devlist USB device list created by ftdi_usb_find_all() |
edb82cbf | 188 | */ |
d2f10023 | 189 | void ftdi_list_free(struct ftdi_device_list **devlist) |
edb82cbf | 190 | { |
6db32169 TJ |
191 | struct ftdi_device_list *curdev, *next; |
192 | ||
193 | for (curdev = *devlist; curdev != NULL;) { | |
194 | next = curdev->next; | |
195 | free(curdev); | |
196 | curdev = next; | |
edb82cbf TJ |
197 | } |
198 | ||
6db32169 | 199 | *devlist = NULL; |
edb82cbf TJ |
200 | } |
201 | ||
1941414d | 202 | /** |
474786c0 TJ |
203 | Return device ID strings from the usb device. |
204 | ||
205 | The parameters manufacturer, description and serial may be NULL | |
206 | or pointer to buffers to store the fetched strings. | |
207 | ||
898c34dd TJ |
208 | \note Use this function only in combination with ftdi_usb_find_all() |
209 | as it closes the internal "usb_dev" after use. | |
210 | ||
474786c0 TJ |
211 | \param ftdi pointer to ftdi_context |
212 | \param dev libusb usb_dev to use | |
213 | \param manufacturer Store manufacturer string here if not NULL | |
214 | \param mnf_len Buffer size of manufacturer string | |
215 | \param description Store product description string here if not NULL | |
216 | \param desc_len Buffer size of product description string | |
217 | \param serial Store serial string here if not NULL | |
218 | \param serial_len Buffer size of serial string | |
219 | ||
220 | \retval 0: all fine | |
221 | \retval -1: wrong arguments | |
222 | \retval -4: unable to open device | |
223 | \retval -7: get product manufacturer failed | |
224 | \retval -8: get product description failed | |
225 | \retval -9: get serial number failed | |
226 | \retval -10: unable to close device | |
227 | */ | |
228 | int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct usb_device * dev, | |
229 | char * manufacturer, int mnf_len, char * description, int desc_len, char * serial, int serial_len) | |
230 | { | |
231 | if ((ftdi==NULL) || (dev==NULL)) | |
232 | return -1; | |
233 | ||
234 | if (!(ftdi->usb_dev = usb_open(dev))) | |
235 | ftdi_error_return(-4, usb_strerror()); | |
236 | ||
237 | if (manufacturer != NULL) { | |
238 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iManufacturer, manufacturer, mnf_len) <= 0) { | |
239 | usb_close (ftdi->usb_dev); | |
240 | ftdi_error_return(-7, usb_strerror()); | |
241 | } | |
242 | } | |
243 | ||
244 | if (description != NULL) { | |
245 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, description, desc_len) <= 0) { | |
246 | usb_close (ftdi->usb_dev); | |
247 | ftdi_error_return(-8, usb_strerror()); | |
248 | } | |
249 | } | |
250 | ||
251 | if (serial != NULL) { | |
252 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, serial, serial_len) <= 0) { | |
253 | usb_close (ftdi->usb_dev); | |
254 | ftdi_error_return(-9, usb_strerror()); | |
255 | } | |
256 | } | |
257 | ||
258 | if (usb_close (ftdi->usb_dev) != 0) | |
259 | ftdi_error_return(-10, usb_strerror()); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | /** | |
1941414d | 265 | Opens a ftdi device given by a usb_device. |
7b18bef6 | 266 | |
1941414d TJ |
267 | \param ftdi pointer to ftdi_context |
268 | \param dev libusb usb_dev to use | |
269 | ||
270 | \retval 0: all fine | |
271 | \retval -4: unable to open device | |
272 | \retval -5: unable to claim device | |
273 | \retval -6: reset failed | |
274 | \retval -7: set baudrate failed | |
7b18bef6 TJ |
275 | */ |
276 | int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct usb_device *dev) | |
277 | { | |
d2f10023 | 278 | int detach_errno = 0; |
7b18bef6 TJ |
279 | if (!(ftdi->usb_dev = usb_open(dev))) |
280 | ftdi_error_return(-4, "usb_open() failed"); | |
d2f10023 TJ |
281 | |
282 | #ifdef LIBUSB_HAS_GET_DRIVER_NP | |
283 | // Try to detach ftdi_sio kernel module | |
284 | // Returns ENODATA if driver is not loaded | |
285 | if (usb_detach_kernel_driver_np(ftdi->usb_dev, ftdi->interface) != 0 && errno != ENODATA) | |
286 | detach_errno = errno; | |
287 | #endif | |
288 | ||
7b18bef6 TJ |
289 | if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) { |
290 | usb_close (ftdi->usb_dev); | |
d2f10023 TJ |
291 | if (detach_errno == EPERM) { |
292 | ftdi_error_return(-8, "inappropriate permissions on device!"); | |
293 | } else { | |
294 | ftdi_error_return(-5, "unable to claim usb device. Make sure ftdi_sio is unloaded!"); | |
295 | } | |
7b18bef6 TJ |
296 | } |
297 | ||
298 | if (ftdi_usb_reset (ftdi) != 0) { | |
299 | usb_close (ftdi->usb_dev); | |
300 | ftdi_error_return(-6, "ftdi_usb_reset failed"); | |
301 | } | |
302 | ||
303 | if (ftdi_set_baudrate (ftdi, 9600) != 0) { | |
304 | usb_close (ftdi->usb_dev); | |
305 | ftdi_error_return(-7, "set baudrate failed"); | |
306 | } | |
307 | ||
308 | // Try to guess chip type | |
309 | // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0 | |
310 | if (dev->descriptor.bcdDevice == 0x400 || (dev->descriptor.bcdDevice == 0x200 | |
311 | && dev->descriptor.iSerialNumber == 0)) | |
312 | ftdi->type = TYPE_BM; | |
313 | else if (dev->descriptor.bcdDevice == 0x200) | |
314 | ftdi->type = TYPE_AM; | |
315 | else if (dev->descriptor.bcdDevice == 0x500) { | |
316 | ftdi->type = TYPE_2232C; | |
317 | if (!ftdi->index) | |
318 | ftdi->index = INTERFACE_A; | |
cb6250fa TJ |
319 | } else if (dev->descriptor.bcdDevice == 0x600) |
320 | ftdi->type = TYPE_R; | |
7b18bef6 TJ |
321 | |
322 | ftdi_error_return(0, "all fine"); | |
323 | } | |
324 | ||
1941414d TJ |
325 | /** |
326 | Opens the first device with a given vendor and product ids. | |
327 | ||
328 | \param ftdi pointer to ftdi_context | |
329 | \param vendor Vendor ID | |
330 | \param product Product ID | |
331 | ||
9bec2387 | 332 | \retval same as ftdi_usb_open_desc() |
1941414d | 333 | */ |
edb82cbf TJ |
334 | int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product) |
335 | { | |
336 | return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL); | |
337 | } | |
338 | ||
1941414d TJ |
339 | /** |
340 | Opens the first device with a given, vendor id, product id, | |
341 | description and serial. | |
342 | ||
343 | \param ftdi pointer to ftdi_context | |
344 | \param vendor Vendor ID | |
345 | \param product Product ID | |
346 | \param description Description to search for. Use NULL if not needed. | |
347 | \param serial Serial to search for. Use NULL if not needed. | |
348 | ||
349 | \retval 0: all fine | |
350 | \retval -1: usb_find_busses() failed | |
351 | \retval -2: usb_find_devices() failed | |
352 | \retval -3: usb device not found | |
353 | \retval -4: unable to open device | |
354 | \retval -5: unable to claim device | |
355 | \retval -6: reset failed | |
356 | \retval -7: set baudrate failed | |
357 | \retval -8: get product description failed | |
358 | \retval -9: get serial number failed | |
359 | \retval -10: unable to close device | |
a3da1d95 | 360 | */ |
04e1ea0a | 361 | int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product, |
a8f46ddc TJ |
362 | const char* description, const char* serial) |
363 | { | |
98452d97 TJ |
364 | struct usb_bus *bus; |
365 | struct usb_device *dev; | |
c3d95b87 | 366 | char string[256]; |
98452d97 TJ |
367 | |
368 | usb_init(); | |
369 | ||
c3d95b87 TJ |
370 | if (usb_find_busses() < 0) |
371 | ftdi_error_return(-1, "usb_find_busses() failed"); | |
c3d95b87 | 372 | if (usb_find_devices() < 0) |
edb82cbf | 373 | ftdi_error_return(-2, "usb_find_devices() failed"); |
a3da1d95 | 374 | |
98452d97 TJ |
375 | for (bus = usb_busses; bus; bus = bus->next) { |
376 | for (dev = bus->devices; dev; dev = dev->next) { | |
a8f46ddc | 377 | if (dev->descriptor.idVendor == vendor |
c3d95b87 TJ |
378 | && dev->descriptor.idProduct == product) { |
379 | if (!(ftdi->usb_dev = usb_open(dev))) | |
380 | ftdi_error_return(-4, "usb_open() failed"); | |
381 | ||
a8f46ddc TJ |
382 | if (description != NULL) { |
383 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0) { | |
c3d95b87 TJ |
384 | usb_close (ftdi->usb_dev); |
385 | ftdi_error_return(-8, "unable to fetch product description"); | |
98452d97 | 386 | } |
a8f46ddc | 387 | if (strncmp(string, description, sizeof(string)) != 0) { |
edb82cbf TJ |
388 | if (usb_close (ftdi->usb_dev) != 0) |
389 | ftdi_error_return(-10, "unable to close device"); | |
a8f46ddc TJ |
390 | continue; |
391 | } | |
392 | } | |
393 | if (serial != NULL) { | |
394 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0) { | |
c3d95b87 TJ |
395 | usb_close (ftdi->usb_dev); |
396 | ftdi_error_return(-9, "unable to fetch serial number"); | |
a8f46ddc TJ |
397 | } |
398 | if (strncmp(string, serial, sizeof(string)) != 0) { | |
a8f46ddc | 399 | if (usb_close (ftdi->usb_dev) != 0) |
edb82cbf | 400 | ftdi_error_return(-10, "unable to close device"); |
a8f46ddc TJ |
401 | continue; |
402 | } | |
403 | } | |
98452d97 | 404 | |
edb82cbf TJ |
405 | if (usb_close (ftdi->usb_dev) != 0) |
406 | ftdi_error_return(-10, "unable to close device"); | |
d2f10023 | 407 | |
edb82cbf | 408 | return ftdi_usb_open_dev(ftdi, dev); |
98452d97 TJ |
409 | } |
410 | } | |
98452d97 | 411 | } |
a3da1d95 | 412 | |
98452d97 | 413 | // device not found |
c3d95b87 | 414 | ftdi_error_return(-3, "device not found"); |
a3da1d95 GE |
415 | } |
416 | ||
1941414d TJ |
417 | /** |
418 | Resets the ftdi device. | |
a3da1d95 | 419 | |
1941414d TJ |
420 | \param ftdi pointer to ftdi_context |
421 | ||
422 | \retval 0: all fine | |
423 | \retval -1: FTDI reset failed | |
4837f98a | 424 | */ |
edb82cbf | 425 | int ftdi_usb_reset(struct ftdi_context *ftdi) |
a8f46ddc | 426 | { |
c3d95b87 TJ |
427 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
428 | ftdi_error_return(-1,"FTDI reset failed"); | |
429 | ||
545820ce | 430 | // Invalidate data in the readbuffer |
bfcee05b TJ |
431 | ftdi->readbuffer_offset = 0; |
432 | ftdi->readbuffer_remaining = 0; | |
433 | ||
a3da1d95 GE |
434 | return 0; |
435 | } | |
436 | ||
1941414d TJ |
437 | /** |
438 | Clears the buffers on the chip. | |
439 | ||
440 | \param ftdi pointer to ftdi_context | |
4837f98a | 441 | |
1941414d TJ |
442 | \retval 0: all fine |
443 | \retval -1: write buffer purge failed | |
444 | \retval -2: read buffer purge failed | |
4837f98a | 445 | */ |
a8f46ddc TJ |
446 | int ftdi_usb_purge_buffers(struct ftdi_context *ftdi) |
447 | { | |
c3d95b87 TJ |
448 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
449 | ftdi_error_return(-1, "FTDI purge of RX buffer failed"); | |
450 | ||
545820ce | 451 | // Invalidate data in the readbuffer |
bfcee05b TJ |
452 | ftdi->readbuffer_offset = 0; |
453 | ftdi->readbuffer_remaining = 0; | |
a60be878 | 454 | |
c3d95b87 TJ |
455 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 2, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
456 | ftdi_error_return(-2, "FTDI purge of TX buffer failed"); | |
545820ce | 457 | |
a60be878 TJ |
458 | return 0; |
459 | } | |
a3da1d95 | 460 | |
1941414d TJ |
461 | /** |
462 | Closes the ftdi device. Call ftdi_deinit() if you're cleaning up. | |
463 | ||
464 | \param ftdi pointer to ftdi_context | |
465 | ||
466 | \retval 0: all fine | |
467 | \retval -1: usb_release failed | |
468 | \retval -2: usb_close failed | |
a3da1d95 | 469 | */ |
a8f46ddc TJ |
470 | int ftdi_usb_close(struct ftdi_context *ftdi) |
471 | { | |
a3da1d95 GE |
472 | int rtn = 0; |
473 | ||
98452d97 | 474 | if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0) |
a3da1d95 | 475 | rtn = -1; |
98452d97 TJ |
476 | |
477 | if (usb_close (ftdi->usb_dev) != 0) | |
a3da1d95 | 478 | rtn = -2; |
98452d97 | 479 | |
a3da1d95 GE |
480 | return rtn; |
481 | } | |
482 | ||
a3da1d95 | 483 | /* |
53ad271d TJ |
484 | ftdi_convert_baudrate returns nearest supported baud rate to that requested. |
485 | Function is only used internally | |
b5ec1820 | 486 | \internal |
53ad271d | 487 | */ |
0126d22e | 488 | static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi, |
a8f46ddc TJ |
489 | unsigned short *value, unsigned short *index) |
490 | { | |
53ad271d TJ |
491 | static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1}; |
492 | static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3}; | |
493 | static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7}; | |
494 | int divisor, best_divisor, best_baud, best_baud_diff; | |
495 | unsigned long encoded_divisor; | |
496 | int i; | |
497 | ||
498 | if (baudrate <= 0) { | |
499 | // Return error | |
500 | return -1; | |
501 | } | |
502 | ||
503 | divisor = 24000000 / baudrate; | |
504 | ||
0126d22e | 505 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
506 | // Round down to supported fraction (AM only) |
507 | divisor -= am_adjust_dn[divisor & 7]; | |
508 | } | |
509 | ||
510 | // Try this divisor and the one above it (because division rounds down) | |
511 | best_divisor = 0; | |
512 | best_baud = 0; | |
513 | best_baud_diff = 0; | |
514 | for (i = 0; i < 2; i++) { | |
515 | int try_divisor = divisor + i; | |
516 | int baud_estimate; | |
517 | int baud_diff; | |
518 | ||
519 | // Round up to supported divisor value | |
df612d35 | 520 | if (try_divisor <= 8) { |
53ad271d TJ |
521 | // Round up to minimum supported divisor |
522 | try_divisor = 8; | |
0126d22e | 523 | } else if (ftdi->type != TYPE_AM && try_divisor < 12) { |
53ad271d TJ |
524 | // BM doesn't support divisors 9 through 11 inclusive |
525 | try_divisor = 12; | |
526 | } else if (divisor < 16) { | |
527 | // AM doesn't support divisors 9 through 15 inclusive | |
528 | try_divisor = 16; | |
529 | } else { | |
0126d22e | 530 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
531 | // Round up to supported fraction (AM only) |
532 | try_divisor += am_adjust_up[try_divisor & 7]; | |
533 | if (try_divisor > 0x1FFF8) { | |
534 | // Round down to maximum supported divisor value (for AM) | |
535 | try_divisor = 0x1FFF8; | |
536 | } | |
537 | } else { | |
538 | if (try_divisor > 0x1FFFF) { | |
539 | // Round down to maximum supported divisor value (for BM) | |
540 | try_divisor = 0x1FFFF; | |
541 | } | |
542 | } | |
543 | } | |
544 | // Get estimated baud rate (to nearest integer) | |
545 | baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor; | |
546 | // Get absolute difference from requested baud rate | |
547 | if (baud_estimate < baudrate) { | |
548 | baud_diff = baudrate - baud_estimate; | |
549 | } else { | |
550 | baud_diff = baud_estimate - baudrate; | |
551 | } | |
552 | if (i == 0 || baud_diff < best_baud_diff) { | |
553 | // Closest to requested baud rate so far | |
554 | best_divisor = try_divisor; | |
555 | best_baud = baud_estimate; | |
556 | best_baud_diff = baud_diff; | |
557 | if (baud_diff == 0) { | |
558 | // Spot on! No point trying | |
559 | break; | |
560 | } | |
561 | } | |
562 | } | |
563 | // Encode the best divisor value | |
564 | encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14); | |
565 | // Deal with special cases for encoded value | |
566 | if (encoded_divisor == 1) { | |
4837f98a | 567 | encoded_divisor = 0; // 3000000 baud |
53ad271d | 568 | } else if (encoded_divisor == 0x4001) { |
4837f98a | 569 | encoded_divisor = 1; // 2000000 baud (BM only) |
53ad271d TJ |
570 | } |
571 | // Split into "value" and "index" values | |
572 | *value = (unsigned short)(encoded_divisor & 0xFFFF); | |
de22df10 | 573 | if(ftdi->type == TYPE_2232C) { |
0126d22e TJ |
574 | *index = (unsigned short)(encoded_divisor >> 8); |
575 | *index &= 0xFF00; | |
a9c57c05 | 576 | *index |= ftdi->index; |
0126d22e TJ |
577 | } |
578 | else | |
579 | *index = (unsigned short)(encoded_divisor >> 16); | |
c3d95b87 | 580 | |
53ad271d TJ |
581 | // Return the nearest baud rate |
582 | return best_baud; | |
583 | } | |
584 | ||
1941414d | 585 | /** |
9bec2387 | 586 | Sets the chip baud rate |
1941414d TJ |
587 | |
588 | \param ftdi pointer to ftdi_context | |
9bec2387 | 589 | \param baudrate baud rate to set |
1941414d TJ |
590 | |
591 | \retval 0: all fine | |
592 | \retval -1: invalid baudrate | |
593 | \retval -2: setting baudrate failed | |
a3da1d95 | 594 | */ |
a8f46ddc TJ |
595 | int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate) |
596 | { | |
53ad271d TJ |
597 | unsigned short value, index; |
598 | int actual_baudrate; | |
a3da1d95 GE |
599 | |
600 | if (ftdi->bitbang_enabled) { | |
601 | baudrate = baudrate*4; | |
602 | } | |
603 | ||
25707904 | 604 | actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index); |
c3d95b87 TJ |
605 | if (actual_baudrate <= 0) |
606 | ftdi_error_return (-1, "Silly baudrate <= 0."); | |
a3da1d95 | 607 | |
53ad271d TJ |
608 | // Check within tolerance (about 5%) |
609 | if ((actual_baudrate * 2 < baudrate /* Catch overflows */ ) | |
610 | || ((actual_baudrate < baudrate) | |
611 | ? (actual_baudrate * 21 < baudrate * 20) | |
c3d95b87 TJ |
612 | : (baudrate * 21 < actual_baudrate * 20))) |
613 | ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4"); | |
545820ce | 614 | |
c3d95b87 TJ |
615 | if (usb_control_msg(ftdi->usb_dev, 0x40, 3, value, index, NULL, 0, ftdi->usb_write_timeout) != 0) |
616 | ftdi_error_return (-2, "Setting new baudrate failed"); | |
a3da1d95 GE |
617 | |
618 | ftdi->baudrate = baudrate; | |
619 | return 0; | |
620 | } | |
621 | ||
1941414d TJ |
622 | /** |
623 | Set (RS232) line characteristics by Alain Abbas | |
4837f98a | 624 | |
1941414d TJ |
625 | \param ftdi pointer to ftdi_context |
626 | \param bits Number of bits | |
627 | \param sbit Number of stop bits | |
628 | \param parity Parity mode | |
629 | ||
630 | \retval 0: all fine | |
631 | \retval -1: Setting line property failed | |
2f73e59f TJ |
632 | */ |
633 | int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits, | |
d2f10023 | 634 | enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity) |
2f73e59f TJ |
635 | { |
636 | unsigned short value = bits; | |
637 | ||
638 | switch(parity) { | |
639 | case NONE: | |
640 | value |= (0x00 << 8); | |
641 | break; | |
642 | case ODD: | |
643 | value |= (0x01 << 8); | |
644 | break; | |
645 | case EVEN: | |
646 | value |= (0x02 << 8); | |
647 | break; | |
648 | case MARK: | |
649 | value |= (0x03 << 8); | |
650 | break; | |
651 | case SPACE: | |
652 | value |= (0x04 << 8); | |
653 | break; | |
654 | } | |
d2f10023 | 655 | |
2f73e59f TJ |
656 | switch(sbit) { |
657 | case STOP_BIT_1: | |
658 | value |= (0x00 << 11); | |
659 | break; | |
660 | case STOP_BIT_15: | |
661 | value |= (0x01 << 11); | |
662 | break; | |
663 | case STOP_BIT_2: | |
664 | value |= (0x02 << 11); | |
665 | break; | |
666 | } | |
d2f10023 | 667 | |
2f73e59f TJ |
668 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x04, value, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
669 | ftdi_error_return (-1, "Setting new line property failed"); | |
d2f10023 | 670 | |
2f73e59f TJ |
671 | return 0; |
672 | } | |
a3da1d95 | 673 | |
1941414d TJ |
674 | /** |
675 | Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip | |
676 | ||
677 | \param ftdi pointer to ftdi_context | |
678 | \param buf Buffer with the data | |
679 | \param size Size of the buffer | |
680 | ||
681 | \retval <0: error code from usb_bulk_write() | |
682 | \retval >0: number of bytes written | |
683 | */ | |
a8f46ddc TJ |
684 | int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size) |
685 | { | |
a3da1d95 GE |
686 | int ret; |
687 | int offset = 0; | |
545820ce | 688 | int total_written = 0; |
c3d95b87 | 689 | |
a3da1d95 | 690 | while (offset < size) { |
948f9ada | 691 | int write_size = ftdi->writebuffer_chunksize; |
a3da1d95 GE |
692 | |
693 | if (offset+write_size > size) | |
694 | write_size = size-offset; | |
695 | ||
98452d97 | 696 | ret = usb_bulk_write(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout); |
c3d95b87 TJ |
697 | if (ret < 0) |
698 | ftdi_error_return(ret, "usb bulk write failed"); | |
a3da1d95 | 699 | |
c3d95b87 | 700 | total_written += ret; |
a3da1d95 GE |
701 | offset += write_size; |
702 | } | |
703 | ||
545820ce | 704 | return total_written; |
a3da1d95 GE |
705 | } |
706 | ||
4c9e3812 GE |
707 | /* these structs are stolen from libusb linux implementation |
708 | they are needed to directly access usbfs and offer async | |
709 | writing */ | |
710 | ||
711 | struct usb_iso_packet_desc { | |
712 | unsigned int length; | |
713 | unsigned int actual_length; | |
714 | unsigned int status; | |
715 | }; | |
716 | ||
717 | struct usb_urb { | |
718 | unsigned char type; | |
719 | unsigned char endpoint; | |
720 | int status; | |
721 | unsigned int flags; | |
722 | void *buffer; | |
723 | int buffer_length; | |
724 | int actual_length; | |
725 | int start_frame; | |
726 | int number_of_packets; | |
727 | int error_count; | |
728 | unsigned int signr; /* signal to be sent on error, -1 if none should be sent */ | |
729 | void *usercontext; | |
730 | struct usb_iso_packet_desc iso_frame_desc[0]; | |
731 | }; | |
732 | ||
733 | /* this is strongly dependent on libusb using the same struct layout. If libusb | |
734 | changes in some later version this may break horribly (this is for libusb 0.1.12) */ | |
735 | struct usb_dev_handle { | |
736 | int fd; | |
737 | // some other stuff coming here we don't need | |
738 | }; | |
739 | ||
740 | // some defines for direct usb access, taken from libusb | |
741 | #define MAX_READ_WRITE (16 * 1024) | |
742 | #define IOCTL_USB_SUBMITURB _IOR('U', 10, struct usb_urb) | |
743 | #define USB_URB_TYPE_BULK 3 | |
744 | ||
745 | /** | |
746 | Stupid libusb does not offer async writes nor does it allow | |
747 | access to its fd - so we need some hacks here. | |
748 | */ | |
749 | static int usb_bulk_write_async(usb_dev_handle *dev, int ep, char *bytes, int size) | |
750 | { | |
751 | struct usb_urb urb; | |
752 | int bytesdone = 0, requested; | |
753 | struct usb_urb *context; | |
754 | int ret, waiting; | |
755 | ||
756 | do { | |
757 | fd_set writefds; | |
758 | ||
759 | requested = size - bytesdone; | |
760 | if (requested > MAX_READ_WRITE) | |
761 | requested = MAX_READ_WRITE; | |
762 | ||
763 | urb.type = USB_URB_TYPE_BULK; | |
764 | urb.endpoint = ep; | |
765 | urb.flags = 0; | |
766 | urb.buffer = bytes + bytesdone; | |
767 | urb.buffer_length = requested; | |
768 | urb.signr = 0; | |
769 | urb.actual_length = 0; | |
770 | urb.number_of_packets = 0; /* don't do isochronous yet */ | |
771 | urb.usercontext = (void*)1000; /* use something else than libusb... */ | |
772 | ||
773 | ret = ioctl(dev->fd, IOCTL_USB_SUBMITURB, &urb); | |
774 | if (ret < 0) | |
775 | return ret; /* the caller can read errno to get more info */ | |
776 | ||
777 | bytesdone += requested; | |
778 | } while (bytesdone < size); | |
779 | return bytesdone; | |
780 | } | |
781 | ||
782 | /** | |
783 | Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip. | |
784 | Does not wait for completion of the transfer nor does it make sure that | |
785 | the transfer was successful. | |
786 | ||
787 | This function could be extended to use signals and callbacks to inform the | |
788 | caller of completion or error - but this is not done yet, volunteers welcome. | |
789 | ||
790 | Works around libusb and directly accesses functions only available on Linux. | |
791 | ||
792 | \param ftdi pointer to ftdi_context | |
793 | \param buf Buffer with the data | |
794 | \param size Size of the buffer | |
795 | ||
796 | \retval <0: error code from usb_bulk_write() | |
797 | \retval >0: number of bytes written | |
798 | */ | |
799 | int ftdi_write_data_async(struct ftdi_context *ftdi, unsigned char *buf, int size) | |
800 | { | |
801 | int ret; | |
802 | int offset = 0; | |
803 | int total_written = 0; | |
804 | ||
805 | while (offset < size) { | |
806 | int write_size = ftdi->writebuffer_chunksize; | |
807 | ||
808 | if (offset+write_size > size) | |
809 | write_size = size-offset; | |
810 | ||
811 | ret = usb_bulk_write_async(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size); | |
812 | if (ret < 0) | |
813 | ftdi_error_return(ret, "usb bulk write async failed"); | |
814 | ||
815 | total_written += ret; | |
816 | offset += write_size; | |
817 | } | |
818 | ||
819 | return total_written; | |
820 | } | |
821 | ||
822 | ||
1941414d TJ |
823 | /** |
824 | Configure write buffer chunk size. | |
825 | Default is 4096. | |
826 | ||
827 | \param ftdi pointer to ftdi_context | |
828 | \param chunksize Chunk size | |
a3da1d95 | 829 | |
1941414d TJ |
830 | \retval 0: all fine |
831 | */ | |
a8f46ddc TJ |
832 | int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) |
833 | { | |
948f9ada TJ |
834 | ftdi->writebuffer_chunksize = chunksize; |
835 | return 0; | |
836 | } | |
837 | ||
1941414d TJ |
838 | /** |
839 | Get write buffer chunk size. | |
840 | ||
841 | \param ftdi pointer to ftdi_context | |
842 | \param chunksize Pointer to store chunk size in | |
948f9ada | 843 | |
1941414d TJ |
844 | \retval 0: all fine |
845 | */ | |
a8f46ddc TJ |
846 | int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) |
847 | { | |
948f9ada TJ |
848 | *chunksize = ftdi->writebuffer_chunksize; |
849 | return 0; | |
850 | } | |
cbabb7d3 | 851 | |
1941414d TJ |
852 | /** |
853 | Reads data in chunks (see ftdi_read_data_set_chunksize()) from the chip. | |
854 | ||
855 | Automatically strips the two modem status bytes transfered during every read. | |
948f9ada | 856 | |
1941414d TJ |
857 | \param ftdi pointer to ftdi_context |
858 | \param buf Buffer to store data in | |
859 | \param size Size of the buffer | |
860 | ||
861 | \retval <0: error code from usb_bulk_read() | |
d77b0e94 | 862 | \retval 0: no data was available |
1941414d TJ |
863 | \retval >0: number of bytes read |
864 | ||
865 | \remark This function is not useful in bitbang mode. | |
866 | Use ftdi_read_pins() to get the current state of the pins. | |
867 | */ | |
a8f46ddc TJ |
868 | int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) |
869 | { | |
1c733d33 | 870 | int offset = 0, ret = 1, i, num_of_chunks, chunk_remains; |
d9f0cce7 | 871 | |
948f9ada TJ |
872 | // everything we want is still in the readbuffer? |
873 | if (size <= ftdi->readbuffer_remaining) { | |
d9f0cce7 TJ |
874 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size); |
875 | ||
876 | // Fix offsets | |
877 | ftdi->readbuffer_remaining -= size; | |
878 | ftdi->readbuffer_offset += size; | |
879 | ||
545820ce | 880 | /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */ |
d9f0cce7 TJ |
881 | |
882 | return size; | |
979a145c | 883 | } |
948f9ada TJ |
884 | // something still in the readbuffer, but not enough to satisfy 'size'? |
885 | if (ftdi->readbuffer_remaining != 0) { | |
d9f0cce7 | 886 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining); |
979a145c | 887 | |
d9f0cce7 TJ |
888 | // Fix offset |
889 | offset += ftdi->readbuffer_remaining; | |
948f9ada | 890 | } |
948f9ada | 891 | // do the actual USB read |
cbabb7d3 | 892 | while (offset < size && ret > 0) { |
d9f0cce7 TJ |
893 | ftdi->readbuffer_remaining = 0; |
894 | ftdi->readbuffer_offset = 0; | |
98452d97 TJ |
895 | /* returns how much received */ |
896 | ret = usb_bulk_read (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_read_timeout); | |
c3d95b87 TJ |
897 | if (ret < 0) |
898 | ftdi_error_return(ret, "usb bulk read failed"); | |
98452d97 | 899 | |
d9f0cce7 TJ |
900 | if (ret > 2) { |
901 | // skip FTDI status bytes. | |
902 | // Maybe stored in the future to enable modem use | |
1c733d33 TJ |
903 | num_of_chunks = ret / 64; |
904 | chunk_remains = ret % 64; | |
905 | //printf("ret = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", ret, num_of_chunks, chunk_remains, ftdi->readbuffer_offset); | |
906 | ||
d9f0cce7 TJ |
907 | ftdi->readbuffer_offset += 2; |
908 | ret -= 2; | |
1c733d33 | 909 | |
fde0a89e | 910 | if (ret > 62) { |
1c733d33 TJ |
911 | for (i = 1; i < num_of_chunks; i++) |
912 | memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i, | |
913 | ftdi->readbuffer+ftdi->readbuffer_offset+64*i, | |
914 | 62); | |
915 | if (chunk_remains > 2) { | |
916 | memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i, | |
917 | ftdi->readbuffer+ftdi->readbuffer_offset+64*i, | |
918 | chunk_remains-2); | |
919 | ret -= 2*num_of_chunks; | |
920 | } else | |
921 | ret -= 2*(num_of_chunks-1)+chunk_remains; | |
922 | } | |
d9f0cce7 TJ |
923 | } else if (ret <= 2) { |
924 | // no more data to read? | |
925 | return offset; | |
926 | } | |
d9f0cce7 TJ |
927 | if (ret > 0) { |
928 | // data still fits in buf? | |
929 | if (offset+ret <= size) { | |
930 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret); | |
545820ce | 931 | //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]); |
d9f0cce7 TJ |
932 | offset += ret; |
933 | ||
53ad271d | 934 | /* Did we read exactly the right amount of bytes? */ |
d9f0cce7 | 935 | if (offset == size) |
c4446c36 TJ |
936 | //printf("read_data exact rem %d offset %d\n", |
937 | //ftdi->readbuffer_remaining, offset); | |
d9f0cce7 TJ |
938 | return offset; |
939 | } else { | |
940 | // only copy part of the data or size <= readbuffer_chunksize | |
941 | int part_size = size-offset; | |
942 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size); | |
98452d97 | 943 | |
d9f0cce7 TJ |
944 | ftdi->readbuffer_offset += part_size; |
945 | ftdi->readbuffer_remaining = ret-part_size; | |
946 | offset += part_size; | |
947 | ||
53ad271d TJ |
948 | /* printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n", |
949 | part_size, size, offset, ret, ftdi->readbuffer_remaining); */ | |
d9f0cce7 TJ |
950 | |
951 | return offset; | |
952 | } | |
953 | } | |
cbabb7d3 | 954 | } |
948f9ada | 955 | // never reached |
29c4af7f | 956 | return -127; |
a3da1d95 GE |
957 | } |
958 | ||
1941414d TJ |
959 | /** |
960 | Configure read buffer chunk size. | |
961 | Default is 4096. | |
962 | ||
963 | Automatically reallocates the buffer. | |
a3da1d95 | 964 | |
1941414d TJ |
965 | \param ftdi pointer to ftdi_context |
966 | \param chunksize Chunk size | |
967 | ||
968 | \retval 0: all fine | |
969 | */ | |
a8f46ddc TJ |
970 | int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) |
971 | { | |
29c4af7f TJ |
972 | unsigned char *new_buf; |
973 | ||
948f9ada TJ |
974 | // Invalidate all remaining data |
975 | ftdi->readbuffer_offset = 0; | |
976 | ftdi->readbuffer_remaining = 0; | |
977 | ||
c3d95b87 TJ |
978 | if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) |
979 | ftdi_error_return(-1, "out of memory for readbuffer"); | |
d9f0cce7 | 980 | |
948f9ada TJ |
981 | ftdi->readbuffer = new_buf; |
982 | ftdi->readbuffer_chunksize = chunksize; | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
1941414d TJ |
987 | /** |
988 | Get read buffer chunk size. | |
948f9ada | 989 | |
1941414d TJ |
990 | \param ftdi pointer to ftdi_context |
991 | \param chunksize Pointer to store chunk size in | |
992 | ||
993 | \retval 0: all fine | |
994 | */ | |
a8f46ddc TJ |
995 | int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) |
996 | { | |
948f9ada TJ |
997 | *chunksize = ftdi->readbuffer_chunksize; |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | ||
1941414d TJ |
1002 | /** |
1003 | Enable bitbang mode. | |
948f9ada | 1004 | |
1941414d TJ |
1005 | For advanced bitbang modes of the FT2232C chip use ftdi_set_bitmode(). |
1006 | ||
1007 | \param ftdi pointer to ftdi_context | |
1008 | \param bitmask Bitmask to configure lines. | |
1009 | HIGH/ON value configures a line as output. | |
1010 | ||
1011 | \retval 0: all fine | |
1012 | \retval -1: can't enable bitbang mode | |
1013 | */ | |
a8f46ddc TJ |
1014 | int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask) |
1015 | { | |
a3da1d95 GE |
1016 | unsigned short usb_val; |
1017 | ||
d9f0cce7 | 1018 | usb_val = bitmask; // low byte: bitmask |
3119537f TJ |
1019 | /* FT2232C: Set bitbang_mode to 2 to enable SPI */ |
1020 | usb_val |= (ftdi->bitbang_mode << 8); | |
1021 | ||
c3d95b87 TJ |
1022 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
1023 | ftdi_error_return(-1, "unable to enter bitbang mode. Perhaps not a BM type chip?"); | |
1024 | ||
a3da1d95 GE |
1025 | ftdi->bitbang_enabled = 1; |
1026 | return 0; | |
1027 | } | |
1028 | ||
1941414d TJ |
1029 | /** |
1030 | Disable bitbang mode. | |
a3da1d95 | 1031 | |
1941414d TJ |
1032 | \param ftdi pointer to ftdi_context |
1033 | ||
1034 | \retval 0: all fine | |
1035 | \retval -1: can't disable bitbang mode | |
1036 | */ | |
a8f46ddc TJ |
1037 | int ftdi_disable_bitbang(struct ftdi_context *ftdi) |
1038 | { | |
c3d95b87 TJ |
1039 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
1040 | ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?"); | |
a3da1d95 GE |
1041 | |
1042 | ftdi->bitbang_enabled = 0; | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1941414d TJ |
1046 | /** |
1047 | Enable advanced bitbang mode for FT2232C chips. | |
a3da1d95 | 1048 | |
1941414d TJ |
1049 | \param ftdi pointer to ftdi_context |
1050 | \param bitmask Bitmask to configure lines. | |
1051 | HIGH/ON value configures a line as output. | |
1052 | \param mode Bitbang mode: 1 for normal mode, 2 for SPI mode | |
1053 | ||
1054 | \retval 0: all fine | |
1055 | \retval -1: can't enable bitbang mode | |
1056 | */ | |
c4446c36 TJ |
1057 | int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode) |
1058 | { | |
1059 | unsigned short usb_val; | |
1060 | ||
1061 | usb_val = bitmask; // low byte: bitmask | |
1062 | usb_val |= (mode << 8); | |
1063 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) | |
1064 | ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a 2232C type chip?"); | |
1065 | ||
1066 | ftdi->bitbang_mode = mode; | |
1067 | ftdi->bitbang_enabled = (mode == BITMODE_BITBANG || mode == BITMODE_SYNCBB)?1:0; | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1941414d TJ |
1071 | /** |
1072 | Directly read pin state. Useful for bitbang mode. | |
1073 | ||
1074 | \param ftdi pointer to ftdi_context | |
1075 | \param pins Pointer to store pins into | |
1076 | ||
1077 | \retval 0: all fine | |
1078 | \retval -1: read pins failed | |
1079 | */ | |
a8f46ddc TJ |
1080 | int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins) |
1081 | { | |
85f3c596 | 1082 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0C, 0, ftdi->index, (char *)pins, 1, ftdi->usb_read_timeout) != 1) |
c3d95b87 | 1083 | ftdi_error_return(-1, "read pins failed"); |
a3da1d95 | 1084 | |
a3da1d95 GE |
1085 | return 0; |
1086 | } | |
1087 | ||
1941414d TJ |
1088 | /** |
1089 | Set latency timer | |
1090 | ||
1091 | The FTDI chip keeps data in the internal buffer for a specific | |
1092 | amount of time if the buffer is not full yet to decrease | |
1093 | load on the usb bus. | |
a3da1d95 | 1094 | |
1941414d TJ |
1095 | \param ftdi pointer to ftdi_context |
1096 | \param latency Value between 1 and 255 | |
1097 | ||
1098 | \retval 0: all fine | |
1099 | \retval -1: latency out of range | |
1100 | \retval -2: unable to set latency timer | |
1101 | */ | |
a8f46ddc TJ |
1102 | int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency) |
1103 | { | |
a3da1d95 GE |
1104 | unsigned short usb_val; |
1105 | ||
c3d95b87 TJ |
1106 | if (latency < 1) |
1107 | ftdi_error_return(-1, "latency out of range. Only valid for 1-255"); | |
a3da1d95 | 1108 | |
d79d2e68 | 1109 | usb_val = latency; |
c3d95b87 TJ |
1110 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x09, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
1111 | ftdi_error_return(-2, "unable to set latency timer"); | |
1112 | ||
a3da1d95 GE |
1113 | return 0; |
1114 | } | |
1115 | ||
1941414d TJ |
1116 | /** |
1117 | Get latency timer | |
a3da1d95 | 1118 | |
1941414d TJ |
1119 | \param ftdi pointer to ftdi_context |
1120 | \param latency Pointer to store latency value in | |
1121 | ||
1122 | \retval 0: all fine | |
1123 | \retval -1: unable to get latency timer | |
1124 | */ | |
a8f46ddc TJ |
1125 | int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency) |
1126 | { | |
a3da1d95 | 1127 | unsigned short usb_val; |
c3d95b87 TJ |
1128 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0A, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) |
1129 | ftdi_error_return(-1, "reading latency timer failed"); | |
a3da1d95 GE |
1130 | |
1131 | *latency = (unsigned char)usb_val; | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1941414d TJ |
1135 | /** |
1136 | Init eeprom with default values. | |
a3da1d95 | 1137 | |
1941414d TJ |
1138 | \param eeprom Pointer to ftdi_eeprom |
1139 | */ | |
a8f46ddc TJ |
1140 | void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom) |
1141 | { | |
f396dbad TJ |
1142 | eeprom->vendor_id = 0x0403; |
1143 | eeprom->product_id = 0x6001; | |
d9f0cce7 | 1144 | |
b8aa7b35 TJ |
1145 | eeprom->self_powered = 1; |
1146 | eeprom->remote_wakeup = 1; | |
1147 | eeprom->BM_type_chip = 1; | |
d9f0cce7 | 1148 | |
b8aa7b35 TJ |
1149 | eeprom->in_is_isochronous = 0; |
1150 | eeprom->out_is_isochronous = 0; | |
1151 | eeprom->suspend_pull_downs = 0; | |
d9f0cce7 | 1152 | |
b8aa7b35 TJ |
1153 | eeprom->use_serial = 0; |
1154 | eeprom->change_usb_version = 0; | |
f396dbad | 1155 | eeprom->usb_version = 0x0200; |
b8aa7b35 | 1156 | eeprom->max_power = 0; |
d9f0cce7 | 1157 | |
b8aa7b35 TJ |
1158 | eeprom->manufacturer = NULL; |
1159 | eeprom->product = NULL; | |
1160 | eeprom->serial = NULL; | |
1161 | } | |
1162 | ||
1941414d TJ |
1163 | /** |
1164 | Build binary output from ftdi_eeprom structure. | |
1165 | Output is suitable for ftdi_write_eeprom(). | |
b8aa7b35 | 1166 | |
1941414d TJ |
1167 | \param eeprom Pointer to ftdi_eeprom |
1168 | \param output Buffer of 128 bytes to store eeprom image to | |
1169 | ||
1170 | \retval >0: used eeprom size | |
1171 | \retval -1: eeprom size (128 bytes) exceeded by custom strings | |
b8aa7b35 | 1172 | */ |
a8f46ddc TJ |
1173 | int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output) |
1174 | { | |
b8aa7b35 TJ |
1175 | unsigned char i, j; |
1176 | unsigned short checksum, value; | |
1177 | unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0; | |
1178 | int size_check; | |
1179 | ||
1180 | if (eeprom->manufacturer != NULL) | |
d9f0cce7 | 1181 | manufacturer_size = strlen(eeprom->manufacturer); |
b8aa7b35 | 1182 | if (eeprom->product != NULL) |
d9f0cce7 | 1183 | product_size = strlen(eeprom->product); |
b8aa7b35 | 1184 | if (eeprom->serial != NULL) |
d9f0cce7 | 1185 | serial_size = strlen(eeprom->serial); |
b8aa7b35 | 1186 | |
d9f0cce7 TJ |
1187 | size_check = 128; // eeprom is 128 bytes |
1188 | size_check -= 28; // 28 are always in use (fixed) | |
b8aa7b35 TJ |
1189 | size_check -= manufacturer_size*2; |
1190 | size_check -= product_size*2; | |
1191 | size_check -= serial_size*2; | |
1192 | ||
1193 | // eeprom size exceeded? | |
1194 | if (size_check < 0) | |
d9f0cce7 | 1195 | return (-1); |
b8aa7b35 TJ |
1196 | |
1197 | // empty eeprom | |
1198 | memset (output, 0, 128); | |
1199 | ||
1200 | // Addr 00: Stay 00 00 | |
1201 | // Addr 02: Vendor ID | |
1202 | output[0x02] = eeprom->vendor_id; | |
1203 | output[0x03] = eeprom->vendor_id >> 8; | |
1204 | ||
1205 | // Addr 04: Product ID | |
1206 | output[0x04] = eeprom->product_id; | |
1207 | output[0x05] = eeprom->product_id >> 8; | |
1208 | ||
1209 | // Addr 06: Device release number (0400h for BM features) | |
1210 | output[0x06] = 0x00; | |
d9f0cce7 | 1211 | |
b8aa7b35 | 1212 | if (eeprom->BM_type_chip == 1) |
d9f0cce7 | 1213 | output[0x07] = 0x04; |
b8aa7b35 | 1214 | else |
d9f0cce7 | 1215 | output[0x07] = 0x02; |
b8aa7b35 TJ |
1216 | |
1217 | // Addr 08: Config descriptor | |
1218 | // Bit 1: remote wakeup if 1 | |
1219 | // Bit 0: self powered if 1 | |
1220 | // | |
1221 | j = 0; | |
1222 | if (eeprom->self_powered == 1) | |
d9f0cce7 | 1223 | j = j | 1; |
b8aa7b35 | 1224 | if (eeprom->remote_wakeup == 1) |
d9f0cce7 | 1225 | j = j | 2; |
b8aa7b35 TJ |
1226 | output[0x08] = j; |
1227 | ||
1228 | // Addr 09: Max power consumption: max power = value * 2 mA | |
d9f0cce7 TJ |
1229 | output[0x09] = eeprom->max_power; |
1230 | ; | |
1231 | ||
b8aa7b35 TJ |
1232 | // Addr 0A: Chip configuration |
1233 | // Bit 7: 0 - reserved | |
1234 | // Bit 6: 0 - reserved | |
1235 | // Bit 5: 0 - reserved | |
1236 | // Bit 4: 1 - Change USB version | |
1237 | // Bit 3: 1 - Use the serial number string | |
1238 | // Bit 2: 1 - Enable suspend pull downs for lower power | |
1239 | // Bit 1: 1 - Out EndPoint is Isochronous | |
1240 | // Bit 0: 1 - In EndPoint is Isochronous | |
1241 | // | |
1242 | j = 0; | |
1243 | if (eeprom->in_is_isochronous == 1) | |
d9f0cce7 | 1244 | j = j | 1; |
b8aa7b35 | 1245 | if (eeprom->out_is_isochronous == 1) |
d9f0cce7 | 1246 | j = j | 2; |
b8aa7b35 | 1247 | if (eeprom->suspend_pull_downs == 1) |
d9f0cce7 | 1248 | j = j | 4; |
b8aa7b35 | 1249 | if (eeprom->use_serial == 1) |
d9f0cce7 | 1250 | j = j | 8; |
b8aa7b35 | 1251 | if (eeprom->change_usb_version == 1) |
d9f0cce7 | 1252 | j = j | 16; |
b8aa7b35 | 1253 | output[0x0A] = j; |
d9f0cce7 | 1254 | |
b8aa7b35 TJ |
1255 | // Addr 0B: reserved |
1256 | output[0x0B] = 0x00; | |
d9f0cce7 | 1257 | |
b8aa7b35 TJ |
1258 | // Addr 0C: USB version low byte when 0x0A bit 4 is set |
1259 | // Addr 0D: USB version high byte when 0x0A bit 4 is set | |
1260 | if (eeprom->change_usb_version == 1) { | |
1261 | output[0x0C] = eeprom->usb_version; | |
d9f0cce7 | 1262 | output[0x0D] = eeprom->usb_version >> 8; |
b8aa7b35 TJ |
1263 | } |
1264 | ||
1265 | ||
1266 | // Addr 0E: Offset of the manufacturer string + 0x80 | |
1267 | output[0x0E] = 0x14 + 0x80; | |
1268 | ||
1269 | // Addr 0F: Length of manufacturer string | |
1270 | output[0x0F] = manufacturer_size*2 + 2; | |
1271 | ||
1272 | // Addr 10: Offset of the product string + 0x80, calculated later | |
1273 | // Addr 11: Length of product string | |
1274 | output[0x11] = product_size*2 + 2; | |
1275 | ||
1276 | // Addr 12: Offset of the serial string + 0x80, calculated later | |
1277 | // Addr 13: Length of serial string | |
1278 | output[0x13] = serial_size*2 + 2; | |
1279 | ||
1280 | // Dynamic content | |
a862ddcf | 1281 | output[0x14] = manufacturer_size*2 + 2; |
d9f0cce7 TJ |
1282 | output[0x15] = 0x03; // type: string |
1283 | ||
b8aa7b35 | 1284 | i = 0x16, j = 0; |
d9f0cce7 | 1285 | |
b8aa7b35 TJ |
1286 | // Output manufacturer |
1287 | for (j = 0; j < manufacturer_size; j++) { | |
d9f0cce7 TJ |
1288 | output[i] = eeprom->manufacturer[j], i++; |
1289 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
1290 | } |
1291 | ||
1292 | // Output product name | |
d9f0cce7 | 1293 | output[0x10] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
1294 | output[i] = product_size*2 + 2, i++; |
1295 | output[i] = 0x03, i++; | |
1296 | for (j = 0; j < product_size; j++) { | |
d9f0cce7 TJ |
1297 | output[i] = eeprom->product[j], i++; |
1298 | output[i] = 0x00, i++; | |
b8aa7b35 | 1299 | } |
d9f0cce7 | 1300 | |
b8aa7b35 | 1301 | // Output serial |
d9f0cce7 | 1302 | output[0x12] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
1303 | output[i] = serial_size*2 + 2, i++; |
1304 | output[i] = 0x03, i++; | |
1305 | for (j = 0; j < serial_size; j++) { | |
d9f0cce7 TJ |
1306 | output[i] = eeprom->serial[j], i++; |
1307 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
1308 | } |
1309 | ||
1310 | // calculate checksum | |
1311 | checksum = 0xAAAA; | |
d9f0cce7 | 1312 | |
b8aa7b35 | 1313 | for (i = 0; i < 63; i++) { |
d9f0cce7 TJ |
1314 | value = output[i*2]; |
1315 | value += output[(i*2)+1] << 8; | |
b8aa7b35 | 1316 | |
d9f0cce7 TJ |
1317 | checksum = value^checksum; |
1318 | checksum = (checksum << 1) | (checksum >> 15); | |
b8aa7b35 TJ |
1319 | } |
1320 | ||
1321 | output[0x7E] = checksum; | |
d9f0cce7 | 1322 | output[0x7F] = checksum >> 8; |
b8aa7b35 | 1323 | |
8ed61121 | 1324 | return size_check; |
b8aa7b35 TJ |
1325 | } |
1326 | ||
1941414d TJ |
1327 | /** |
1328 | Read eeprom | |
1329 | ||
1330 | \param ftdi pointer to ftdi_context | |
1331 | \param eeprom Pointer to store eeprom into | |
b8aa7b35 | 1332 | |
1941414d TJ |
1333 | \retval 0: all fine |
1334 | \retval -1: read failed | |
1335 | */ | |
a8f46ddc TJ |
1336 | int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) |
1337 | { | |
a3da1d95 GE |
1338 | int i; |
1339 | ||
1340 | for (i = 0; i < 64; i++) { | |
c3d95b87 TJ |
1341 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, i, eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2) |
1342 | ftdi_error_return(-1, "reading eeprom failed"); | |
a3da1d95 GE |
1343 | } |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
cb6250fa TJ |
1348 | /* |
1349 | ftdi_read_chipid_shift does the bitshift operation needed for the FTDIChip-ID | |
1350 | Function is only used internally | |
1351 | \internal | |
1352 | */ | |
1353 | static unsigned char ftdi_read_chipid_shift(unsigned char value) | |
1354 | { | |
1355 | return ((value & 1) << 1) | | |
1356 | ((value & 2) << 5) | | |
1357 | ((value & 4) >> 2) | | |
1358 | ((value & 8) << 4) | | |
1359 | ((value & 16) >> 1) | | |
1360 | ((value & 32) >> 1) | | |
1361 | ((value & 64) >> 4) | | |
1362 | ((value & 128) >> 2); | |
1363 | } | |
1364 | ||
1365 | /** | |
1366 | Read the FTDIChip-ID from R-type devices | |
1367 | ||
1368 | \param ftdi pointer to ftdi_context | |
1369 | \param chipid Pointer to store FTDIChip-ID | |
1370 | ||
1371 | \retval 0: all fine | |
1372 | \retval -1: read failed | |
1373 | */ | |
1374 | int ftdi_read_chipid(struct ftdi_context *ftdi, unsigned int *chipid) | |
1375 | { | |
c7eb3112 | 1376 | unsigned int a = 0, b = 0; |
cb6250fa TJ |
1377 | |
1378 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, 0x43, (char *)&a, 2, ftdi->usb_read_timeout) == 2) | |
1379 | { | |
1380 | a = a << 8 | a >> 8; | |
1381 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, 0x44, (char *)&b, 2, ftdi->usb_read_timeout) == 2) | |
1382 | { | |
1383 | b = b << 8 | b >> 8; | |
1384 | a = (a << 16) | b; | |
912d50ca TJ |
1385 | a = ftdi_read_chipid_shift(a) | ftdi_read_chipid_shift(a>>8)<<8 |
1386 | | ftdi_read_chipid_shift(a>>16)<<16 | ftdi_read_chipid_shift(a>>24)<<24; | |
cb6250fa | 1387 | *chipid = a ^ 0xa5f0f7d1; |
c7eb3112 | 1388 | return 0; |
cb6250fa TJ |
1389 | } |
1390 | } | |
1391 | ||
c7eb3112 | 1392 | ftdi_error_return(-1, "read of FTDIChip-ID failed"); |
cb6250fa TJ |
1393 | } |
1394 | ||
1941414d TJ |
1395 | /** |
1396 | Write eeprom | |
a3da1d95 | 1397 | |
1941414d TJ |
1398 | \param ftdi pointer to ftdi_context |
1399 | \param eeprom Pointer to read eeprom from | |
1400 | ||
1401 | \retval 0: all fine | |
1402 | \retval -1: read failed | |
1403 | */ | |
a8f46ddc TJ |
1404 | int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) |
1405 | { | |
a3da1d95 GE |
1406 | unsigned short usb_val; |
1407 | int i; | |
1408 | ||
1409 | for (i = 0; i < 64; i++) { | |
d9f0cce7 TJ |
1410 | usb_val = eeprom[i*2]; |
1411 | usb_val += eeprom[(i*2)+1] << 8; | |
c3d95b87 TJ |
1412 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x91, usb_val, i, NULL, 0, ftdi->usb_write_timeout) != 0) |
1413 | ftdi_error_return(-1, "unable to write eeprom"); | |
a3da1d95 GE |
1414 | } |
1415 | ||
1416 | return 0; | |
1417 | } | |
1418 | ||
1941414d TJ |
1419 | /** |
1420 | Erase eeprom | |
a3da1d95 | 1421 | |
1941414d TJ |
1422 | \param ftdi pointer to ftdi_context |
1423 | ||
1424 | \retval 0: all fine | |
1425 | \retval -1: erase failed | |
1426 | */ | |
a8f46ddc TJ |
1427 | int ftdi_erase_eeprom(struct ftdi_context *ftdi) |
1428 | { | |
c3d95b87 TJ |
1429 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0) |
1430 | ftdi_error_return(-1, "unable to erase eeprom"); | |
a3da1d95 GE |
1431 | |
1432 | return 0; | |
1433 | } | |
c3d95b87 | 1434 | |
1941414d TJ |
1435 | /** |
1436 | Get string representation for last error code | |
c3d95b87 | 1437 | |
1941414d TJ |
1438 | \param ftdi pointer to ftdi_context |
1439 | ||
1440 | \retval Pointer to error string | |
1441 | */ | |
c3d95b87 TJ |
1442 | char *ftdi_get_error_string (struct ftdi_context *ftdi) |
1443 | { | |
1444 | return ftdi->error_str; | |
1445 | } | |
a01d31e2 | 1446 | |
9bec2387 TJ |
1447 | /* |
1448 | Flow control code by Lorenz Moesenlechner (lorenz@hcilab.org) | |
1449 | and Matthias Kranz (matthias@hcilab.org) | |
1450 | */ | |
1941414d TJ |
1451 | /** |
1452 | Set flowcontrol for ftdi chip | |
a01d31e2 | 1453 | |
1941414d TJ |
1454 | \param ftdi pointer to ftdi_context |
1455 | \param flowctrl flow control to use. should be | |
1456 | SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS | |
1457 | ||
1458 | \retval 0: all fine | |
1459 | \retval -1: set flow control failed | |
1460 | */ | |
a01d31e2 TJ |
1461 | int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl) |
1462 | { | |
1463 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_FLOW_CTRL_REQUEST_TYPE, | |
d2f10023 TJ |
1464 | SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->interface), |
1465 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1466 | ftdi_error_return(-1, "set flow control failed"); | |
a01d31e2 TJ |
1467 | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1941414d TJ |
1471 | /** |
1472 | Set dtr line | |
1473 | ||
1474 | \param ftdi pointer to ftdi_context | |
1475 | \param state state to set line to (1 or 0) | |
1476 | ||
1477 | \retval 0: all fine | |
1478 | \retval -1: set dtr failed | |
1479 | */ | |
a01d31e2 TJ |
1480 | int ftdi_setdtr(struct ftdi_context *ftdi, int state) |
1481 | { | |
1482 | unsigned short usb_val; | |
1483 | ||
d2f10023 | 1484 | if (state) |
a01d31e2 TJ |
1485 | usb_val = SIO_SET_DTR_HIGH; |
1486 | else | |
1487 | usb_val = SIO_SET_DTR_LOW; | |
1488 | ||
1489 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE, | |
d2f10023 TJ |
1490 | SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface, |
1491 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1492 | ftdi_error_return(-1, "set dtr failed"); | |
a01d31e2 TJ |
1493 | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1941414d TJ |
1497 | /** |
1498 | Set rts line | |
1499 | ||
1500 | \param ftdi pointer to ftdi_context | |
1501 | \param state state to set line to (1 or 0) | |
1502 | ||
1503 | \retval 0: all fine | |
1504 | \retval -1 set rts failed | |
1505 | */ | |
a01d31e2 TJ |
1506 | int ftdi_setrts(struct ftdi_context *ftdi, int state) |
1507 | { | |
1508 | unsigned short usb_val; | |
1509 | ||
d2f10023 | 1510 | if (state) |
a01d31e2 TJ |
1511 | usb_val = SIO_SET_RTS_HIGH; |
1512 | else | |
1513 | usb_val = SIO_SET_RTS_LOW; | |
1514 | ||
d2f10023 TJ |
1515 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE, |
1516 | SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface, | |
1517 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1518 | ftdi_error_return(-1, "set of rts failed"); | |
a01d31e2 TJ |
1519 | |
1520 | return 0; | |
1521 | } | |
b5ec1820 TJ |
1522 | |
1523 | /* @} end of doxygen libftdi group */ |