Commit | Line | Data |
---|---|---|
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 | |
98452d97 | 17 | #include <usb.h> |
a8f46ddc | 18 | #include <string.h> |
d2f10023 | 19 | #include <errno.h> |
0e302db6 | 20 | |
98452d97 | 21 | #include "ftdi.h" |
a3da1d95 | 22 | |
21abaf2e | 23 | #define ftdi_error_return(code, str) do { \ |
2f73e59f | 24 | ftdi->error_str = str; \ |
21abaf2e | 25 | return code; \ |
d2f10023 | 26 | } while(0); |
c3d95b87 TJ |
27 | |
28 | ||
1941414d TJ |
29 | /** |
30 | Initializes a ftdi_context. | |
4837f98a | 31 | |
1941414d | 32 | \param ftdi pointer to ftdi_context |
4837f98a | 33 | |
1941414d TJ |
34 | \retval 0: all fine |
35 | \retval -1: couldn't allocate read buffer | |
36 | ||
37 | \remark This should be called before all functions | |
948f9ada | 38 | */ |
a8f46ddc TJ |
39 | int ftdi_init(struct ftdi_context *ftdi) |
40 | { | |
98452d97 | 41 | ftdi->usb_dev = NULL; |
545820ce TJ |
42 | ftdi->usb_read_timeout = 5000; |
43 | ftdi->usb_write_timeout = 5000; | |
a3da1d95 | 44 | |
53ad271d | 45 | ftdi->type = TYPE_BM; /* chip type */ |
a3da1d95 GE |
46 | ftdi->baudrate = -1; |
47 | ftdi->bitbang_enabled = 0; | |
48 | ||
948f9ada TJ |
49 | ftdi->readbuffer = NULL; |
50 | ftdi->readbuffer_offset = 0; | |
51 | ftdi->readbuffer_remaining = 0; | |
52 | ftdi->writebuffer_chunksize = 4096; | |
53 | ||
545820ce TJ |
54 | ftdi->interface = 0; |
55 | ftdi->index = 0; | |
56 | ftdi->in_ep = 0x02; | |
57 | ftdi->out_ep = 0x81; | |
3119537f | 58 | ftdi->bitbang_mode = 1; /* 1: Normal bitbang mode, 2: SPI bitbang mode */ |
53ad271d | 59 | |
a3da1d95 GE |
60 | ftdi->error_str = NULL; |
61 | ||
1c733d33 TJ |
62 | /* All fine. Now allocate the readbuffer */ |
63 | return ftdi_read_data_set_chunksize(ftdi, 4096); | |
948f9ada | 64 | } |
4837f98a | 65 | |
1941414d TJ |
66 | /** |
67 | Open selected channels on a chip, otherwise use first channel. | |
68 | ||
69 | \param ftdi pointer to ftdi_context | |
70 | \param interface Interface to use for FT2232C chips. | |
71 | ||
72 | \retval 0: all fine | |
73 | \retval -1: unknown interface | |
c4446c36 | 74 | */ |
0ce2f5fa | 75 | int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface) |
c4446c36 TJ |
76 | { |
77 | switch (interface) { | |
78 | case INTERFACE_ANY: | |
79 | case INTERFACE_A: | |
0ce2f5fa | 80 | /* ftdi_usb_open_desc cares to set the right index, depending on the found chip */ |
c4446c36 TJ |
81 | break; |
82 | case INTERFACE_B: | |
83 | ftdi->interface = 1; | |
84 | ftdi->index = INTERFACE_B; | |
85 | ftdi->in_ep = 0x04; | |
86 | ftdi->out_ep = 0x83; | |
87 | break; | |
88 | default: | |
89 | ftdi_error_return(-1, "Unknown interface"); | |
90 | } | |
91 | return 0; | |
92 | } | |
948f9ada | 93 | |
1941414d TJ |
94 | /** |
95 | Deinitializes a ftdi_context. | |
4837f98a | 96 | |
1941414d | 97 | \param ftdi pointer to ftdi_context |
4837f98a | 98 | */ |
a8f46ddc TJ |
99 | void ftdi_deinit(struct ftdi_context *ftdi) |
100 | { | |
948f9ada | 101 | if (ftdi->readbuffer != NULL) { |
d9f0cce7 TJ |
102 | free(ftdi->readbuffer); |
103 | ftdi->readbuffer = NULL; | |
948f9ada | 104 | } |
a3da1d95 GE |
105 | } |
106 | ||
1941414d TJ |
107 | /** |
108 | Use an already open libusb device. | |
109 | ||
110 | \param ftdi pointer to ftdi_context | |
111 | \param usb libusb usb_dev_handle to use | |
4837f98a | 112 | */ |
a8f46ddc TJ |
113 | void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb) |
114 | { | |
98452d97 TJ |
115 | ftdi->usb_dev = usb; |
116 | } | |
117 | ||
118 | ||
1941414d TJ |
119 | /** |
120 | Finds all ftdi devices on the usb bus. Creates a new ftdi_device_list which | |
121 | needs to be deallocated by ftdi_list_free() after use. | |
122 | ||
123 | \param ftdi pointer to ftdi_context | |
124 | \param devlist Pointer where to store list of found devices | |
125 | \param vendor Vendor ID to search for | |
126 | \param product Product ID to search for | |
edb82cbf | 127 | |
1941414d TJ |
128 | \retval >0: number of devices found |
129 | \retval -1: usb_find_busses() failed | |
130 | \retval -2: usb_find_devices() failed | |
131 | \retval -3: out of memory | |
edb82cbf | 132 | */ |
d2f10023 | 133 | int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product) |
edb82cbf TJ |
134 | { |
135 | struct ftdi_device_list **curdev; | |
136 | struct usb_bus *bus; | |
137 | struct usb_device *dev; | |
138 | int count = 0; | |
d2f10023 | 139 | |
edb82cbf TJ |
140 | usb_init(); |
141 | if (usb_find_busses() < 0) | |
142 | ftdi_error_return(-1, "usb_find_busses() failed"); | |
143 | if (usb_find_devices() < 0) | |
144 | ftdi_error_return(-2, "usb_find_devices() failed"); | |
145 | ||
146 | curdev = devlist; | |
147 | for (bus = usb_busses; bus; bus = bus->next) { | |
148 | for (dev = bus->devices; dev; dev = dev->next) { | |
149 | if (dev->descriptor.idVendor == vendor | |
150 | && dev->descriptor.idProduct == product) | |
151 | { | |
152 | *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list)); | |
153 | if (!*curdev) | |
154 | ftdi_error_return(-3, "out of memory"); | |
d2f10023 | 155 | |
edb82cbf TJ |
156 | (*curdev)->next = NULL; |
157 | (*curdev)->dev = dev; | |
158 | ||
159 | curdev = &(*curdev)->next; | |
160 | count++; | |
161 | } | |
162 | } | |
163 | } | |
d2f10023 | 164 | |
edb82cbf TJ |
165 | return count; |
166 | } | |
167 | ||
1941414d TJ |
168 | /** |
169 | Frees a usb device list. | |
edb82cbf | 170 | |
1941414d | 171 | \param devlist USB device list created by ftdi_usb_find_all() |
edb82cbf | 172 | */ |
d2f10023 | 173 | void ftdi_list_free(struct ftdi_device_list **devlist) |
edb82cbf TJ |
174 | { |
175 | struct ftdi_device_list **curdev; | |
176 | for (; *devlist == NULL; devlist = curdev) { | |
177 | curdev = &(*devlist)->next; | |
178 | free(*devlist); | |
179 | } | |
180 | ||
181 | devlist = NULL; | |
182 | } | |
183 | ||
1941414d TJ |
184 | /** |
185 | Opens a ftdi device given by a usb_device. | |
7b18bef6 | 186 | |
1941414d TJ |
187 | \param ftdi pointer to ftdi_context |
188 | \param dev libusb usb_dev to use | |
189 | ||
190 | \retval 0: all fine | |
191 | \retval -4: unable to open device | |
192 | \retval -5: unable to claim device | |
193 | \retval -6: reset failed | |
194 | \retval -7: set baudrate failed | |
7b18bef6 TJ |
195 | */ |
196 | int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct usb_device *dev) | |
197 | { | |
d2f10023 | 198 | int detach_errno = 0; |
7b18bef6 TJ |
199 | if (!(ftdi->usb_dev = usb_open(dev))) |
200 | ftdi_error_return(-4, "usb_open() failed"); | |
d2f10023 TJ |
201 | |
202 | #ifdef LIBUSB_HAS_GET_DRIVER_NP | |
203 | // Try to detach ftdi_sio kernel module | |
204 | // Returns ENODATA if driver is not loaded | |
205 | if (usb_detach_kernel_driver_np(ftdi->usb_dev, ftdi->interface) != 0 && errno != ENODATA) | |
206 | detach_errno = errno; | |
207 | #endif | |
208 | ||
7b18bef6 TJ |
209 | if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) { |
210 | usb_close (ftdi->usb_dev); | |
d2f10023 TJ |
211 | if (detach_errno == EPERM) { |
212 | ftdi_error_return(-8, "inappropriate permissions on device!"); | |
213 | } else { | |
214 | ftdi_error_return(-5, "unable to claim usb device. Make sure ftdi_sio is unloaded!"); | |
215 | } | |
7b18bef6 TJ |
216 | } |
217 | ||
218 | if (ftdi_usb_reset (ftdi) != 0) { | |
219 | usb_close (ftdi->usb_dev); | |
220 | ftdi_error_return(-6, "ftdi_usb_reset failed"); | |
221 | } | |
222 | ||
223 | if (ftdi_set_baudrate (ftdi, 9600) != 0) { | |
224 | usb_close (ftdi->usb_dev); | |
225 | ftdi_error_return(-7, "set baudrate failed"); | |
226 | } | |
227 | ||
228 | // Try to guess chip type | |
229 | // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0 | |
230 | if (dev->descriptor.bcdDevice == 0x400 || (dev->descriptor.bcdDevice == 0x200 | |
231 | && dev->descriptor.iSerialNumber == 0)) | |
232 | ftdi->type = TYPE_BM; | |
233 | else if (dev->descriptor.bcdDevice == 0x200) | |
234 | ftdi->type = TYPE_AM; | |
235 | else if (dev->descriptor.bcdDevice == 0x500) { | |
236 | ftdi->type = TYPE_2232C; | |
237 | if (!ftdi->index) | |
238 | ftdi->index = INTERFACE_A; | |
239 | } | |
240 | ||
241 | ftdi_error_return(0, "all fine"); | |
242 | } | |
243 | ||
1941414d TJ |
244 | /** |
245 | Opens the first device with a given vendor and product ids. | |
246 | ||
247 | \param ftdi pointer to ftdi_context | |
248 | \param vendor Vendor ID | |
249 | \param product Product ID | |
250 | ||
251 | \retval \see ftdi_usb_open_desc() | |
252 | */ | |
edb82cbf TJ |
253 | int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product) |
254 | { | |
255 | return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL); | |
256 | } | |
257 | ||
1941414d TJ |
258 | /** |
259 | Opens the first device with a given, vendor id, product id, | |
260 | description and serial. | |
261 | ||
262 | \param ftdi pointer to ftdi_context | |
263 | \param vendor Vendor ID | |
264 | \param product Product ID | |
265 | \param description Description to search for. Use NULL if not needed. | |
266 | \param serial Serial to search for. Use NULL if not needed. | |
267 | ||
268 | \retval 0: all fine | |
269 | \retval -1: usb_find_busses() failed | |
270 | \retval -2: usb_find_devices() failed | |
271 | \retval -3: usb device not found | |
272 | \retval -4: unable to open device | |
273 | \retval -5: unable to claim device | |
274 | \retval -6: reset failed | |
275 | \retval -7: set baudrate failed | |
276 | \retval -8: get product description failed | |
277 | \retval -9: get serial number failed | |
278 | \retval -10: unable to close device | |
a3da1d95 | 279 | */ |
04e1ea0a | 280 | int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product, |
a8f46ddc TJ |
281 | const char* description, const char* serial) |
282 | { | |
98452d97 TJ |
283 | struct usb_bus *bus; |
284 | struct usb_device *dev; | |
c3d95b87 | 285 | char string[256]; |
98452d97 TJ |
286 | |
287 | usb_init(); | |
288 | ||
c3d95b87 TJ |
289 | if (usb_find_busses() < 0) |
290 | ftdi_error_return(-1, "usb_find_busses() failed"); | |
c3d95b87 | 291 | if (usb_find_devices() < 0) |
edb82cbf | 292 | ftdi_error_return(-2, "usb_find_devices() failed"); |
a3da1d95 | 293 | |
98452d97 TJ |
294 | for (bus = usb_busses; bus; bus = bus->next) { |
295 | for (dev = bus->devices; dev; dev = dev->next) { | |
a8f46ddc | 296 | if (dev->descriptor.idVendor == vendor |
c3d95b87 TJ |
297 | && dev->descriptor.idProduct == product) { |
298 | if (!(ftdi->usb_dev = usb_open(dev))) | |
299 | ftdi_error_return(-4, "usb_open() failed"); | |
300 | ||
a8f46ddc TJ |
301 | if (description != NULL) { |
302 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0) { | |
c3d95b87 TJ |
303 | usb_close (ftdi->usb_dev); |
304 | ftdi_error_return(-8, "unable to fetch product description"); | |
98452d97 | 305 | } |
a8f46ddc | 306 | if (strncmp(string, description, sizeof(string)) != 0) { |
edb82cbf TJ |
307 | if (usb_close (ftdi->usb_dev) != 0) |
308 | ftdi_error_return(-10, "unable to close device"); | |
a8f46ddc TJ |
309 | continue; |
310 | } | |
311 | } | |
312 | if (serial != NULL) { | |
313 | if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0) { | |
c3d95b87 TJ |
314 | usb_close (ftdi->usb_dev); |
315 | ftdi_error_return(-9, "unable to fetch serial number"); | |
a8f46ddc TJ |
316 | } |
317 | if (strncmp(string, serial, sizeof(string)) != 0) { | |
a8f46ddc | 318 | if (usb_close (ftdi->usb_dev) != 0) |
edb82cbf | 319 | ftdi_error_return(-10, "unable to close device"); |
a8f46ddc TJ |
320 | continue; |
321 | } | |
322 | } | |
98452d97 | 323 | |
edb82cbf TJ |
324 | if (usb_close (ftdi->usb_dev) != 0) |
325 | ftdi_error_return(-10, "unable to close device"); | |
d2f10023 | 326 | |
edb82cbf | 327 | return ftdi_usb_open_dev(ftdi, dev); |
98452d97 TJ |
328 | } |
329 | } | |
98452d97 | 330 | } |
a3da1d95 | 331 | |
98452d97 | 332 | // device not found |
c3d95b87 | 333 | ftdi_error_return(-3, "device not found"); |
a3da1d95 GE |
334 | } |
335 | ||
1941414d TJ |
336 | /** |
337 | Resets the ftdi device. | |
a3da1d95 | 338 | |
1941414d TJ |
339 | \param ftdi pointer to ftdi_context |
340 | ||
341 | \retval 0: all fine | |
342 | \retval -1: FTDI reset failed | |
4837f98a | 343 | */ |
edb82cbf | 344 | int ftdi_usb_reset(struct ftdi_context *ftdi) |
a8f46ddc | 345 | { |
c3d95b87 TJ |
346 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
347 | ftdi_error_return(-1,"FTDI reset failed"); | |
348 | ||
545820ce | 349 | // Invalidate data in the readbuffer |
bfcee05b TJ |
350 | ftdi->readbuffer_offset = 0; |
351 | ftdi->readbuffer_remaining = 0; | |
352 | ||
a3da1d95 GE |
353 | return 0; |
354 | } | |
355 | ||
1941414d TJ |
356 | /** |
357 | Clears the buffers on the chip. | |
358 | ||
359 | \param ftdi pointer to ftdi_context | |
4837f98a | 360 | |
1941414d TJ |
361 | \retval 0: all fine |
362 | \retval -1: write buffer purge failed | |
363 | \retval -2: read buffer purge failed | |
4837f98a | 364 | */ |
a8f46ddc TJ |
365 | int ftdi_usb_purge_buffers(struct ftdi_context *ftdi) |
366 | { | |
c3d95b87 TJ |
367 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
368 | ftdi_error_return(-1, "FTDI purge of RX buffer failed"); | |
369 | ||
545820ce | 370 | // Invalidate data in the readbuffer |
bfcee05b TJ |
371 | ftdi->readbuffer_offset = 0; |
372 | ftdi->readbuffer_remaining = 0; | |
a60be878 | 373 | |
c3d95b87 TJ |
374 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 2, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
375 | ftdi_error_return(-2, "FTDI purge of TX buffer failed"); | |
545820ce | 376 | |
a60be878 TJ |
377 | return 0; |
378 | } | |
a3da1d95 | 379 | |
1941414d TJ |
380 | /** |
381 | Closes the ftdi device. Call ftdi_deinit() if you're cleaning up. | |
382 | ||
383 | \param ftdi pointer to ftdi_context | |
384 | ||
385 | \retval 0: all fine | |
386 | \retval -1: usb_release failed | |
387 | \retval -2: usb_close failed | |
a3da1d95 | 388 | */ |
a8f46ddc TJ |
389 | int ftdi_usb_close(struct ftdi_context *ftdi) |
390 | { | |
a3da1d95 GE |
391 | int rtn = 0; |
392 | ||
98452d97 | 393 | if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0) |
a3da1d95 | 394 | rtn = -1; |
98452d97 TJ |
395 | |
396 | if (usb_close (ftdi->usb_dev) != 0) | |
a3da1d95 | 397 | rtn = -2; |
98452d97 | 398 | |
a3da1d95 GE |
399 | return rtn; |
400 | } | |
401 | ||
a3da1d95 | 402 | /* |
53ad271d TJ |
403 | ftdi_convert_baudrate returns nearest supported baud rate to that requested. |
404 | Function is only used internally | |
405 | */ | |
0126d22e | 406 | static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi, |
a8f46ddc TJ |
407 | unsigned short *value, unsigned short *index) |
408 | { | |
53ad271d TJ |
409 | static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1}; |
410 | static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3}; | |
411 | static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7}; | |
412 | int divisor, best_divisor, best_baud, best_baud_diff; | |
413 | unsigned long encoded_divisor; | |
414 | int i; | |
415 | ||
416 | if (baudrate <= 0) { | |
417 | // Return error | |
418 | return -1; | |
419 | } | |
420 | ||
421 | divisor = 24000000 / baudrate; | |
422 | ||
0126d22e | 423 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
424 | // Round down to supported fraction (AM only) |
425 | divisor -= am_adjust_dn[divisor & 7]; | |
426 | } | |
427 | ||
428 | // Try this divisor and the one above it (because division rounds down) | |
429 | best_divisor = 0; | |
430 | best_baud = 0; | |
431 | best_baud_diff = 0; | |
432 | for (i = 0; i < 2; i++) { | |
433 | int try_divisor = divisor + i; | |
434 | int baud_estimate; | |
435 | int baud_diff; | |
436 | ||
437 | // Round up to supported divisor value | |
df612d35 | 438 | if (try_divisor <= 8) { |
53ad271d TJ |
439 | // Round up to minimum supported divisor |
440 | try_divisor = 8; | |
0126d22e | 441 | } else if (ftdi->type != TYPE_AM && try_divisor < 12) { |
53ad271d TJ |
442 | // BM doesn't support divisors 9 through 11 inclusive |
443 | try_divisor = 12; | |
444 | } else if (divisor < 16) { | |
445 | // AM doesn't support divisors 9 through 15 inclusive | |
446 | try_divisor = 16; | |
447 | } else { | |
0126d22e | 448 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
449 | // Round up to supported fraction (AM only) |
450 | try_divisor += am_adjust_up[try_divisor & 7]; | |
451 | if (try_divisor > 0x1FFF8) { | |
452 | // Round down to maximum supported divisor value (for AM) | |
453 | try_divisor = 0x1FFF8; | |
454 | } | |
455 | } else { | |
456 | if (try_divisor > 0x1FFFF) { | |
457 | // Round down to maximum supported divisor value (for BM) | |
458 | try_divisor = 0x1FFFF; | |
459 | } | |
460 | } | |
461 | } | |
462 | // Get estimated baud rate (to nearest integer) | |
463 | baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor; | |
464 | // Get absolute difference from requested baud rate | |
465 | if (baud_estimate < baudrate) { | |
466 | baud_diff = baudrate - baud_estimate; | |
467 | } else { | |
468 | baud_diff = baud_estimate - baudrate; | |
469 | } | |
470 | if (i == 0 || baud_diff < best_baud_diff) { | |
471 | // Closest to requested baud rate so far | |
472 | best_divisor = try_divisor; | |
473 | best_baud = baud_estimate; | |
474 | best_baud_diff = baud_diff; | |
475 | if (baud_diff == 0) { | |
476 | // Spot on! No point trying | |
477 | break; | |
478 | } | |
479 | } | |
480 | } | |
481 | // Encode the best divisor value | |
482 | encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14); | |
483 | // Deal with special cases for encoded value | |
484 | if (encoded_divisor == 1) { | |
4837f98a | 485 | encoded_divisor = 0; // 3000000 baud |
53ad271d | 486 | } else if (encoded_divisor == 0x4001) { |
4837f98a | 487 | encoded_divisor = 1; // 2000000 baud (BM only) |
53ad271d TJ |
488 | } |
489 | // Split into "value" and "index" values | |
490 | *value = (unsigned short)(encoded_divisor & 0xFFFF); | |
de22df10 | 491 | if(ftdi->type == TYPE_2232C) { |
0126d22e TJ |
492 | *index = (unsigned short)(encoded_divisor >> 8); |
493 | *index &= 0xFF00; | |
a9c57c05 | 494 | *index |= ftdi->index; |
0126d22e TJ |
495 | } |
496 | else | |
497 | *index = (unsigned short)(encoded_divisor >> 16); | |
c3d95b87 | 498 | |
53ad271d TJ |
499 | // Return the nearest baud rate |
500 | return best_baud; | |
501 | } | |
502 | ||
1941414d | 503 | /** |
4837f98a | 504 | Sets the chip baudrate |
1941414d TJ |
505 | |
506 | \param ftdi pointer to ftdi_context | |
507 | ||
508 | \retval 0: all fine | |
509 | \retval -1: invalid baudrate | |
510 | \retval -2: setting baudrate failed | |
a3da1d95 | 511 | */ |
a8f46ddc TJ |
512 | int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate) |
513 | { | |
53ad271d TJ |
514 | unsigned short value, index; |
515 | int actual_baudrate; | |
a3da1d95 GE |
516 | |
517 | if (ftdi->bitbang_enabled) { | |
518 | baudrate = baudrate*4; | |
519 | } | |
520 | ||
25707904 | 521 | actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index); |
c3d95b87 TJ |
522 | if (actual_baudrate <= 0) |
523 | ftdi_error_return (-1, "Silly baudrate <= 0."); | |
a3da1d95 | 524 | |
53ad271d TJ |
525 | // Check within tolerance (about 5%) |
526 | if ((actual_baudrate * 2 < baudrate /* Catch overflows */ ) | |
527 | || ((actual_baudrate < baudrate) | |
528 | ? (actual_baudrate * 21 < baudrate * 20) | |
c3d95b87 TJ |
529 | : (baudrate * 21 < actual_baudrate * 20))) |
530 | ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4"); | |
545820ce | 531 | |
c3d95b87 TJ |
532 | if (usb_control_msg(ftdi->usb_dev, 0x40, 3, value, index, NULL, 0, ftdi->usb_write_timeout) != 0) |
533 | ftdi_error_return (-2, "Setting new baudrate failed"); | |
a3da1d95 GE |
534 | |
535 | ftdi->baudrate = baudrate; | |
536 | return 0; | |
537 | } | |
538 | ||
1941414d TJ |
539 | /** |
540 | Set (RS232) line characteristics by Alain Abbas | |
4837f98a | 541 | |
1941414d TJ |
542 | \param ftdi pointer to ftdi_context |
543 | \param bits Number of bits | |
544 | \param sbit Number of stop bits | |
545 | \param parity Parity mode | |
546 | ||
547 | \retval 0: all fine | |
548 | \retval -1: Setting line property failed | |
2f73e59f TJ |
549 | */ |
550 | int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits, | |
d2f10023 | 551 | enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity) |
2f73e59f TJ |
552 | { |
553 | unsigned short value = bits; | |
554 | ||
555 | switch(parity) { | |
556 | case NONE: | |
557 | value |= (0x00 << 8); | |
558 | break; | |
559 | case ODD: | |
560 | value |= (0x01 << 8); | |
561 | break; | |
562 | case EVEN: | |
563 | value |= (0x02 << 8); | |
564 | break; | |
565 | case MARK: | |
566 | value |= (0x03 << 8); | |
567 | break; | |
568 | case SPACE: | |
569 | value |= (0x04 << 8); | |
570 | break; | |
571 | } | |
d2f10023 | 572 | |
2f73e59f TJ |
573 | switch(sbit) { |
574 | case STOP_BIT_1: | |
575 | value |= (0x00 << 11); | |
576 | break; | |
577 | case STOP_BIT_15: | |
578 | value |= (0x01 << 11); | |
579 | break; | |
580 | case STOP_BIT_2: | |
581 | value |= (0x02 << 11); | |
582 | break; | |
583 | } | |
d2f10023 | 584 | |
2f73e59f TJ |
585 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x04, value, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
586 | ftdi_error_return (-1, "Setting new line property failed"); | |
d2f10023 | 587 | |
2f73e59f TJ |
588 | return 0; |
589 | } | |
a3da1d95 | 590 | |
1941414d TJ |
591 | /** |
592 | Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip | |
593 | ||
594 | \param ftdi pointer to ftdi_context | |
595 | \param buf Buffer with the data | |
596 | \param size Size of the buffer | |
597 | ||
598 | \retval <0: error code from usb_bulk_write() | |
599 | \retval >0: number of bytes written | |
600 | */ | |
a8f46ddc TJ |
601 | int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size) |
602 | { | |
a3da1d95 GE |
603 | int ret; |
604 | int offset = 0; | |
545820ce | 605 | int total_written = 0; |
c3d95b87 | 606 | |
a3da1d95 | 607 | while (offset < size) { |
948f9ada | 608 | int write_size = ftdi->writebuffer_chunksize; |
a3da1d95 GE |
609 | |
610 | if (offset+write_size > size) | |
611 | write_size = size-offset; | |
612 | ||
98452d97 | 613 | ret = usb_bulk_write(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout); |
c3d95b87 TJ |
614 | if (ret < 0) |
615 | ftdi_error_return(ret, "usb bulk write failed"); | |
a3da1d95 | 616 | |
c3d95b87 | 617 | total_written += ret; |
a3da1d95 GE |
618 | offset += write_size; |
619 | } | |
620 | ||
545820ce | 621 | return total_written; |
a3da1d95 GE |
622 | } |
623 | ||
1941414d TJ |
624 | /** |
625 | Configure write buffer chunk size. | |
626 | Default is 4096. | |
627 | ||
628 | \param ftdi pointer to ftdi_context | |
629 | \param chunksize Chunk size | |
a3da1d95 | 630 | |
1941414d TJ |
631 | \retval 0: all fine |
632 | */ | |
a8f46ddc TJ |
633 | int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) |
634 | { | |
948f9ada TJ |
635 | ftdi->writebuffer_chunksize = chunksize; |
636 | return 0; | |
637 | } | |
638 | ||
1941414d TJ |
639 | /** |
640 | Get write buffer chunk size. | |
641 | ||
642 | \param ftdi pointer to ftdi_context | |
643 | \param chunksize Pointer to store chunk size in | |
948f9ada | 644 | |
1941414d TJ |
645 | \retval 0: all fine |
646 | */ | |
a8f46ddc TJ |
647 | int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) |
648 | { | |
948f9ada TJ |
649 | *chunksize = ftdi->writebuffer_chunksize; |
650 | return 0; | |
651 | } | |
cbabb7d3 | 652 | |
1941414d TJ |
653 | /** |
654 | Reads data in chunks (see ftdi_read_data_set_chunksize()) from the chip. | |
655 | ||
656 | Automatically strips the two modem status bytes transfered during every read. | |
948f9ada | 657 | |
1941414d TJ |
658 | \param ftdi pointer to ftdi_context |
659 | \param buf Buffer to store data in | |
660 | \param size Size of the buffer | |
661 | ||
662 | \retval <0: error code from usb_bulk_read() | |
663 | \retval >0: number of bytes read | |
664 | ||
665 | \remark This function is not useful in bitbang mode. | |
666 | Use ftdi_read_pins() to get the current state of the pins. | |
667 | */ | |
a8f46ddc TJ |
668 | int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) |
669 | { | |
1c733d33 | 670 | int offset = 0, ret = 1, i, num_of_chunks, chunk_remains; |
d9f0cce7 | 671 | |
948f9ada TJ |
672 | // everything we want is still in the readbuffer? |
673 | if (size <= ftdi->readbuffer_remaining) { | |
d9f0cce7 TJ |
674 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size); |
675 | ||
676 | // Fix offsets | |
677 | ftdi->readbuffer_remaining -= size; | |
678 | ftdi->readbuffer_offset += size; | |
679 | ||
545820ce | 680 | /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */ |
d9f0cce7 TJ |
681 | |
682 | return size; | |
979a145c | 683 | } |
948f9ada TJ |
684 | // something still in the readbuffer, but not enough to satisfy 'size'? |
685 | if (ftdi->readbuffer_remaining != 0) { | |
d9f0cce7 | 686 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining); |
979a145c | 687 | |
d9f0cce7 TJ |
688 | // Fix offset |
689 | offset += ftdi->readbuffer_remaining; | |
948f9ada | 690 | } |
948f9ada | 691 | // do the actual USB read |
cbabb7d3 | 692 | while (offset < size && ret > 0) { |
d9f0cce7 TJ |
693 | ftdi->readbuffer_remaining = 0; |
694 | ftdi->readbuffer_offset = 0; | |
98452d97 TJ |
695 | /* returns how much received */ |
696 | ret = usb_bulk_read (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_read_timeout); | |
c3d95b87 TJ |
697 | if (ret < 0) |
698 | ftdi_error_return(ret, "usb bulk read failed"); | |
98452d97 | 699 | |
d9f0cce7 TJ |
700 | if (ret > 2) { |
701 | // skip FTDI status bytes. | |
702 | // Maybe stored in the future to enable modem use | |
1c733d33 TJ |
703 | num_of_chunks = ret / 64; |
704 | chunk_remains = ret % 64; | |
705 | //printf("ret = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", ret, num_of_chunks, chunk_remains, ftdi->readbuffer_offset); | |
706 | ||
d9f0cce7 TJ |
707 | ftdi->readbuffer_offset += 2; |
708 | ret -= 2; | |
1c733d33 | 709 | |
fde0a89e | 710 | if (ret > 62) { |
1c733d33 TJ |
711 | for (i = 1; i < num_of_chunks; i++) |
712 | memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i, | |
713 | ftdi->readbuffer+ftdi->readbuffer_offset+64*i, | |
714 | 62); | |
715 | if (chunk_remains > 2) { | |
716 | memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i, | |
717 | ftdi->readbuffer+ftdi->readbuffer_offset+64*i, | |
718 | chunk_remains-2); | |
719 | ret -= 2*num_of_chunks; | |
720 | } else | |
721 | ret -= 2*(num_of_chunks-1)+chunk_remains; | |
722 | } | |
d9f0cce7 TJ |
723 | } else if (ret <= 2) { |
724 | // no more data to read? | |
725 | return offset; | |
726 | } | |
d9f0cce7 TJ |
727 | if (ret > 0) { |
728 | // data still fits in buf? | |
729 | if (offset+ret <= size) { | |
730 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret); | |
545820ce | 731 | //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]); |
d9f0cce7 TJ |
732 | offset += ret; |
733 | ||
53ad271d | 734 | /* Did we read exactly the right amount of bytes? */ |
d9f0cce7 | 735 | if (offset == size) |
c4446c36 TJ |
736 | //printf("read_data exact rem %d offset %d\n", |
737 | //ftdi->readbuffer_remaining, offset); | |
d9f0cce7 TJ |
738 | return offset; |
739 | } else { | |
740 | // only copy part of the data or size <= readbuffer_chunksize | |
741 | int part_size = size-offset; | |
742 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size); | |
98452d97 | 743 | |
d9f0cce7 TJ |
744 | ftdi->readbuffer_offset += part_size; |
745 | ftdi->readbuffer_remaining = ret-part_size; | |
746 | offset += part_size; | |
747 | ||
53ad271d TJ |
748 | /* printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n", |
749 | part_size, size, offset, ret, ftdi->readbuffer_remaining); */ | |
d9f0cce7 TJ |
750 | |
751 | return offset; | |
752 | } | |
753 | } | |
cbabb7d3 | 754 | } |
948f9ada | 755 | // never reached |
29c4af7f | 756 | return -127; |
a3da1d95 GE |
757 | } |
758 | ||
1941414d TJ |
759 | /** |
760 | Configure read buffer chunk size. | |
761 | Default is 4096. | |
762 | ||
763 | Automatically reallocates the buffer. | |
a3da1d95 | 764 | |
1941414d TJ |
765 | \param ftdi pointer to ftdi_context |
766 | \param chunksize Chunk size | |
767 | ||
768 | \retval 0: all fine | |
769 | */ | |
a8f46ddc TJ |
770 | int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) |
771 | { | |
29c4af7f TJ |
772 | unsigned char *new_buf; |
773 | ||
948f9ada TJ |
774 | // Invalidate all remaining data |
775 | ftdi->readbuffer_offset = 0; | |
776 | ftdi->readbuffer_remaining = 0; | |
777 | ||
c3d95b87 TJ |
778 | if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) |
779 | ftdi_error_return(-1, "out of memory for readbuffer"); | |
d9f0cce7 | 780 | |
948f9ada TJ |
781 | ftdi->readbuffer = new_buf; |
782 | ftdi->readbuffer_chunksize = chunksize; | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
1941414d TJ |
787 | /** |
788 | Get read buffer chunk size. | |
948f9ada | 789 | |
1941414d TJ |
790 | \param ftdi pointer to ftdi_context |
791 | \param chunksize Pointer to store chunk size in | |
792 | ||
793 | \retval 0: all fine | |
794 | */ | |
a8f46ddc TJ |
795 | int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) |
796 | { | |
948f9ada TJ |
797 | *chunksize = ftdi->readbuffer_chunksize; |
798 | return 0; | |
799 | } | |
800 | ||
801 | ||
1941414d TJ |
802 | /** |
803 | Enable bitbang mode. | |
948f9ada | 804 | |
1941414d TJ |
805 | For advanced bitbang modes of the FT2232C chip use ftdi_set_bitmode(). |
806 | ||
807 | \param ftdi pointer to ftdi_context | |
808 | \param bitmask Bitmask to configure lines. | |
809 | HIGH/ON value configures a line as output. | |
810 | ||
811 | \retval 0: all fine | |
812 | \retval -1: can't enable bitbang mode | |
813 | */ | |
a8f46ddc TJ |
814 | int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask) |
815 | { | |
a3da1d95 GE |
816 | unsigned short usb_val; |
817 | ||
d9f0cce7 | 818 | usb_val = bitmask; // low byte: bitmask |
3119537f TJ |
819 | /* FT2232C: Set bitbang_mode to 2 to enable SPI */ |
820 | usb_val |= (ftdi->bitbang_mode << 8); | |
821 | ||
c3d95b87 TJ |
822 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
823 | ftdi_error_return(-1, "unable to enter bitbang mode. Perhaps not a BM type chip?"); | |
824 | ||
a3da1d95 GE |
825 | ftdi->bitbang_enabled = 1; |
826 | return 0; | |
827 | } | |
828 | ||
1941414d TJ |
829 | /** |
830 | Disable bitbang mode. | |
a3da1d95 | 831 | |
1941414d TJ |
832 | \param ftdi pointer to ftdi_context |
833 | ||
834 | \retval 0: all fine | |
835 | \retval -1: can't disable bitbang mode | |
836 | */ | |
a8f46ddc TJ |
837 | int ftdi_disable_bitbang(struct ftdi_context *ftdi) |
838 | { | |
c3d95b87 TJ |
839 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
840 | ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?"); | |
a3da1d95 GE |
841 | |
842 | ftdi->bitbang_enabled = 0; | |
843 | return 0; | |
844 | } | |
845 | ||
1941414d TJ |
846 | /** |
847 | Enable advanced bitbang mode for FT2232C chips. | |
a3da1d95 | 848 | |
1941414d TJ |
849 | \param ftdi pointer to ftdi_context |
850 | \param bitmask Bitmask to configure lines. | |
851 | HIGH/ON value configures a line as output. | |
852 | \param mode Bitbang mode: 1 for normal mode, 2 for SPI mode | |
853 | ||
854 | \retval 0: all fine | |
855 | \retval -1: can't enable bitbang mode | |
856 | */ | |
c4446c36 TJ |
857 | int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode) |
858 | { | |
859 | unsigned short usb_val; | |
860 | ||
861 | usb_val = bitmask; // low byte: bitmask | |
862 | usb_val |= (mode << 8); | |
863 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) | |
864 | ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a 2232C type chip?"); | |
865 | ||
866 | ftdi->bitbang_mode = mode; | |
867 | ftdi->bitbang_enabled = (mode == BITMODE_BITBANG || mode == BITMODE_SYNCBB)?1:0; | |
868 | return 0; | |
869 | } | |
870 | ||
1941414d TJ |
871 | /** |
872 | Directly read pin state. Useful for bitbang mode. | |
873 | ||
874 | \param ftdi pointer to ftdi_context | |
875 | \param pins Pointer to store pins into | |
876 | ||
877 | \retval 0: all fine | |
878 | \retval -1: read pins failed | |
879 | */ | |
a8f46ddc TJ |
880 | int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins) |
881 | { | |
85f3c596 | 882 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0C, 0, ftdi->index, (char *)pins, 1, ftdi->usb_read_timeout) != 1) |
c3d95b87 | 883 | ftdi_error_return(-1, "read pins failed"); |
a3da1d95 | 884 | |
a3da1d95 GE |
885 | return 0; |
886 | } | |
887 | ||
1941414d TJ |
888 | /** |
889 | Set latency timer | |
890 | ||
891 | The FTDI chip keeps data in the internal buffer for a specific | |
892 | amount of time if the buffer is not full yet to decrease | |
893 | load on the usb bus. | |
a3da1d95 | 894 | |
1941414d TJ |
895 | \param ftdi pointer to ftdi_context |
896 | \param latency Value between 1 and 255 | |
897 | ||
898 | \retval 0: all fine | |
899 | \retval -1: latency out of range | |
900 | \retval -2: unable to set latency timer | |
901 | */ | |
a8f46ddc TJ |
902 | int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency) |
903 | { | |
a3da1d95 GE |
904 | unsigned short usb_val; |
905 | ||
c3d95b87 TJ |
906 | if (latency < 1) |
907 | ftdi_error_return(-1, "latency out of range. Only valid for 1-255"); | |
a3da1d95 | 908 | |
d79d2e68 | 909 | usb_val = latency; |
c3d95b87 TJ |
910 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x09, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) |
911 | ftdi_error_return(-2, "unable to set latency timer"); | |
912 | ||
a3da1d95 GE |
913 | return 0; |
914 | } | |
915 | ||
1941414d TJ |
916 | /** |
917 | Get latency timer | |
a3da1d95 | 918 | |
1941414d TJ |
919 | \param ftdi pointer to ftdi_context |
920 | \param latency Pointer to store latency value in | |
921 | ||
922 | \retval 0: all fine | |
923 | \retval -1: unable to get latency timer | |
924 | */ | |
a8f46ddc TJ |
925 | int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency) |
926 | { | |
a3da1d95 | 927 | unsigned short usb_val; |
c3d95b87 TJ |
928 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0A, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) |
929 | ftdi_error_return(-1, "reading latency timer failed"); | |
a3da1d95 GE |
930 | |
931 | *latency = (unsigned char)usb_val; | |
932 | return 0; | |
933 | } | |
934 | ||
1941414d TJ |
935 | /** |
936 | Init eeprom with default values. | |
a3da1d95 | 937 | |
1941414d TJ |
938 | \param eeprom Pointer to ftdi_eeprom |
939 | */ | |
a8f46ddc TJ |
940 | void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom) |
941 | { | |
f396dbad TJ |
942 | eeprom->vendor_id = 0x0403; |
943 | eeprom->product_id = 0x6001; | |
d9f0cce7 | 944 | |
b8aa7b35 TJ |
945 | eeprom->self_powered = 1; |
946 | eeprom->remote_wakeup = 1; | |
947 | eeprom->BM_type_chip = 1; | |
d9f0cce7 | 948 | |
b8aa7b35 TJ |
949 | eeprom->in_is_isochronous = 0; |
950 | eeprom->out_is_isochronous = 0; | |
951 | eeprom->suspend_pull_downs = 0; | |
d9f0cce7 | 952 | |
b8aa7b35 TJ |
953 | eeprom->use_serial = 0; |
954 | eeprom->change_usb_version = 0; | |
f396dbad | 955 | eeprom->usb_version = 0x0200; |
b8aa7b35 | 956 | eeprom->max_power = 0; |
d9f0cce7 | 957 | |
b8aa7b35 TJ |
958 | eeprom->manufacturer = NULL; |
959 | eeprom->product = NULL; | |
960 | eeprom->serial = NULL; | |
961 | } | |
962 | ||
1941414d TJ |
963 | /** |
964 | Build binary output from ftdi_eeprom structure. | |
965 | Output is suitable for ftdi_write_eeprom(). | |
b8aa7b35 | 966 | |
1941414d TJ |
967 | \param eeprom Pointer to ftdi_eeprom |
968 | \param output Buffer of 128 bytes to store eeprom image to | |
969 | ||
970 | \retval >0: used eeprom size | |
971 | \retval -1: eeprom size (128 bytes) exceeded by custom strings | |
b8aa7b35 | 972 | */ |
a8f46ddc TJ |
973 | int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output) |
974 | { | |
b8aa7b35 TJ |
975 | unsigned char i, j; |
976 | unsigned short checksum, value; | |
977 | unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0; | |
978 | int size_check; | |
979 | ||
980 | if (eeprom->manufacturer != NULL) | |
d9f0cce7 | 981 | manufacturer_size = strlen(eeprom->manufacturer); |
b8aa7b35 | 982 | if (eeprom->product != NULL) |
d9f0cce7 | 983 | product_size = strlen(eeprom->product); |
b8aa7b35 | 984 | if (eeprom->serial != NULL) |
d9f0cce7 | 985 | serial_size = strlen(eeprom->serial); |
b8aa7b35 | 986 | |
d9f0cce7 TJ |
987 | size_check = 128; // eeprom is 128 bytes |
988 | size_check -= 28; // 28 are always in use (fixed) | |
b8aa7b35 TJ |
989 | size_check -= manufacturer_size*2; |
990 | size_check -= product_size*2; | |
991 | size_check -= serial_size*2; | |
992 | ||
993 | // eeprom size exceeded? | |
994 | if (size_check < 0) | |
d9f0cce7 | 995 | return (-1); |
b8aa7b35 TJ |
996 | |
997 | // empty eeprom | |
998 | memset (output, 0, 128); | |
999 | ||
1000 | // Addr 00: Stay 00 00 | |
1001 | // Addr 02: Vendor ID | |
1002 | output[0x02] = eeprom->vendor_id; | |
1003 | output[0x03] = eeprom->vendor_id >> 8; | |
1004 | ||
1005 | // Addr 04: Product ID | |
1006 | output[0x04] = eeprom->product_id; | |
1007 | output[0x05] = eeprom->product_id >> 8; | |
1008 | ||
1009 | // Addr 06: Device release number (0400h for BM features) | |
1010 | output[0x06] = 0x00; | |
d9f0cce7 | 1011 | |
b8aa7b35 | 1012 | if (eeprom->BM_type_chip == 1) |
d9f0cce7 | 1013 | output[0x07] = 0x04; |
b8aa7b35 | 1014 | else |
d9f0cce7 | 1015 | output[0x07] = 0x02; |
b8aa7b35 TJ |
1016 | |
1017 | // Addr 08: Config descriptor | |
1018 | // Bit 1: remote wakeup if 1 | |
1019 | // Bit 0: self powered if 1 | |
1020 | // | |
1021 | j = 0; | |
1022 | if (eeprom->self_powered == 1) | |
d9f0cce7 | 1023 | j = j | 1; |
b8aa7b35 | 1024 | if (eeprom->remote_wakeup == 1) |
d9f0cce7 | 1025 | j = j | 2; |
b8aa7b35 TJ |
1026 | output[0x08] = j; |
1027 | ||
1028 | // Addr 09: Max power consumption: max power = value * 2 mA | |
d9f0cce7 TJ |
1029 | output[0x09] = eeprom->max_power; |
1030 | ; | |
1031 | ||
b8aa7b35 TJ |
1032 | // Addr 0A: Chip configuration |
1033 | // Bit 7: 0 - reserved | |
1034 | // Bit 6: 0 - reserved | |
1035 | // Bit 5: 0 - reserved | |
1036 | // Bit 4: 1 - Change USB version | |
1037 | // Bit 3: 1 - Use the serial number string | |
1038 | // Bit 2: 1 - Enable suspend pull downs for lower power | |
1039 | // Bit 1: 1 - Out EndPoint is Isochronous | |
1040 | // Bit 0: 1 - In EndPoint is Isochronous | |
1041 | // | |
1042 | j = 0; | |
1043 | if (eeprom->in_is_isochronous == 1) | |
d9f0cce7 | 1044 | j = j | 1; |
b8aa7b35 | 1045 | if (eeprom->out_is_isochronous == 1) |
d9f0cce7 | 1046 | j = j | 2; |
b8aa7b35 | 1047 | if (eeprom->suspend_pull_downs == 1) |
d9f0cce7 | 1048 | j = j | 4; |
b8aa7b35 | 1049 | if (eeprom->use_serial == 1) |
d9f0cce7 | 1050 | j = j | 8; |
b8aa7b35 | 1051 | if (eeprom->change_usb_version == 1) |
d9f0cce7 | 1052 | j = j | 16; |
b8aa7b35 | 1053 | output[0x0A] = j; |
d9f0cce7 | 1054 | |
b8aa7b35 TJ |
1055 | // Addr 0B: reserved |
1056 | output[0x0B] = 0x00; | |
d9f0cce7 | 1057 | |
b8aa7b35 TJ |
1058 | // Addr 0C: USB version low byte when 0x0A bit 4 is set |
1059 | // Addr 0D: USB version high byte when 0x0A bit 4 is set | |
1060 | if (eeprom->change_usb_version == 1) { | |
1061 | output[0x0C] = eeprom->usb_version; | |
d9f0cce7 | 1062 | output[0x0D] = eeprom->usb_version >> 8; |
b8aa7b35 TJ |
1063 | } |
1064 | ||
1065 | ||
1066 | // Addr 0E: Offset of the manufacturer string + 0x80 | |
1067 | output[0x0E] = 0x14 + 0x80; | |
1068 | ||
1069 | // Addr 0F: Length of manufacturer string | |
1070 | output[0x0F] = manufacturer_size*2 + 2; | |
1071 | ||
1072 | // Addr 10: Offset of the product string + 0x80, calculated later | |
1073 | // Addr 11: Length of product string | |
1074 | output[0x11] = product_size*2 + 2; | |
1075 | ||
1076 | // Addr 12: Offset of the serial string + 0x80, calculated later | |
1077 | // Addr 13: Length of serial string | |
1078 | output[0x13] = serial_size*2 + 2; | |
1079 | ||
1080 | // Dynamic content | |
a862ddcf | 1081 | output[0x14] = manufacturer_size*2 + 2; |
d9f0cce7 TJ |
1082 | output[0x15] = 0x03; // type: string |
1083 | ||
b8aa7b35 | 1084 | i = 0x16, j = 0; |
d9f0cce7 | 1085 | |
b8aa7b35 TJ |
1086 | // Output manufacturer |
1087 | for (j = 0; j < manufacturer_size; j++) { | |
d9f0cce7 TJ |
1088 | output[i] = eeprom->manufacturer[j], i++; |
1089 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
1090 | } |
1091 | ||
1092 | // Output product name | |
d9f0cce7 | 1093 | output[0x10] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
1094 | output[i] = product_size*2 + 2, i++; |
1095 | output[i] = 0x03, i++; | |
1096 | for (j = 0; j < product_size; j++) { | |
d9f0cce7 TJ |
1097 | output[i] = eeprom->product[j], i++; |
1098 | output[i] = 0x00, i++; | |
b8aa7b35 | 1099 | } |
d9f0cce7 | 1100 | |
b8aa7b35 | 1101 | // Output serial |
d9f0cce7 | 1102 | output[0x12] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
1103 | output[i] = serial_size*2 + 2, i++; |
1104 | output[i] = 0x03, i++; | |
1105 | for (j = 0; j < serial_size; j++) { | |
d9f0cce7 TJ |
1106 | output[i] = eeprom->serial[j], i++; |
1107 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
1108 | } |
1109 | ||
1110 | // calculate checksum | |
1111 | checksum = 0xAAAA; | |
d9f0cce7 | 1112 | |
b8aa7b35 | 1113 | for (i = 0; i < 63; i++) { |
d9f0cce7 TJ |
1114 | value = output[i*2]; |
1115 | value += output[(i*2)+1] << 8; | |
b8aa7b35 | 1116 | |
d9f0cce7 TJ |
1117 | checksum = value^checksum; |
1118 | checksum = (checksum << 1) | (checksum >> 15); | |
b8aa7b35 TJ |
1119 | } |
1120 | ||
1121 | output[0x7E] = checksum; | |
d9f0cce7 | 1122 | output[0x7F] = checksum >> 8; |
b8aa7b35 | 1123 | |
8ed61121 | 1124 | return size_check; |
b8aa7b35 TJ |
1125 | } |
1126 | ||
1941414d TJ |
1127 | /** |
1128 | Read eeprom | |
1129 | ||
1130 | \param ftdi pointer to ftdi_context | |
1131 | \param eeprom Pointer to store eeprom into | |
b8aa7b35 | 1132 | |
1941414d TJ |
1133 | \retval 0: all fine |
1134 | \retval -1: read failed | |
1135 | */ | |
a8f46ddc TJ |
1136 | int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) |
1137 | { | |
a3da1d95 GE |
1138 | int i; |
1139 | ||
1140 | for (i = 0; i < 64; i++) { | |
c3d95b87 TJ |
1141 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, i, eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2) |
1142 | ftdi_error_return(-1, "reading eeprom failed"); | |
a3da1d95 GE |
1143 | } |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
1941414d TJ |
1148 | /** |
1149 | Write eeprom | |
a3da1d95 | 1150 | |
1941414d TJ |
1151 | \param ftdi pointer to ftdi_context |
1152 | \param eeprom Pointer to read eeprom from | |
1153 | ||
1154 | \retval 0: all fine | |
1155 | \retval -1: read failed | |
1156 | */ | |
a8f46ddc TJ |
1157 | int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) |
1158 | { | |
a3da1d95 GE |
1159 | unsigned short usb_val; |
1160 | int i; | |
1161 | ||
1162 | for (i = 0; i < 64; i++) { | |
d9f0cce7 TJ |
1163 | usb_val = eeprom[i*2]; |
1164 | usb_val += eeprom[(i*2)+1] << 8; | |
c3d95b87 TJ |
1165 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x91, usb_val, i, NULL, 0, ftdi->usb_write_timeout) != 0) |
1166 | ftdi_error_return(-1, "unable to write eeprom"); | |
a3da1d95 GE |
1167 | } |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1941414d TJ |
1172 | /** |
1173 | Erase eeprom | |
a3da1d95 | 1174 | |
1941414d TJ |
1175 | \param ftdi pointer to ftdi_context |
1176 | ||
1177 | \retval 0: all fine | |
1178 | \retval -1: erase failed | |
1179 | */ | |
a8f46ddc TJ |
1180 | int ftdi_erase_eeprom(struct ftdi_context *ftdi) |
1181 | { | |
c3d95b87 TJ |
1182 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0) |
1183 | ftdi_error_return(-1, "unable to erase eeprom"); | |
a3da1d95 GE |
1184 | |
1185 | return 0; | |
1186 | } | |
c3d95b87 | 1187 | |
1941414d TJ |
1188 | /** |
1189 | Get string representation for last error code | |
c3d95b87 | 1190 | |
1941414d TJ |
1191 | \param ftdi pointer to ftdi_context |
1192 | ||
1193 | \retval Pointer to error string | |
1194 | */ | |
c3d95b87 TJ |
1195 | char *ftdi_get_error_string (struct ftdi_context *ftdi) |
1196 | { | |
1197 | return ftdi->error_str; | |
1198 | } | |
a01d31e2 | 1199 | |
1941414d TJ |
1200 | /** |
1201 | Set flowcontrol for ftdi chip | |
a01d31e2 | 1202 | |
1941414d TJ |
1203 | \param ftdi pointer to ftdi_context |
1204 | \param flowctrl flow control to use. should be | |
1205 | SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS | |
1206 | ||
1207 | \retval 0: all fine | |
1208 | \retval -1: set flow control failed | |
1209 | */ | |
a01d31e2 TJ |
1210 | int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl) |
1211 | { | |
1212 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_FLOW_CTRL_REQUEST_TYPE, | |
d2f10023 TJ |
1213 | SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->interface), |
1214 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1215 | ftdi_error_return(-1, "set flow control failed"); | |
a01d31e2 TJ |
1216 | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1941414d TJ |
1220 | /** |
1221 | Set dtr line | |
1222 | ||
1223 | \param ftdi pointer to ftdi_context | |
1224 | \param state state to set line to (1 or 0) | |
1225 | ||
1226 | \retval 0: all fine | |
1227 | \retval -1: set dtr failed | |
1228 | */ | |
a01d31e2 TJ |
1229 | int ftdi_setdtr(struct ftdi_context *ftdi, int state) |
1230 | { | |
1231 | unsigned short usb_val; | |
1232 | ||
d2f10023 | 1233 | if (state) |
a01d31e2 TJ |
1234 | usb_val = SIO_SET_DTR_HIGH; |
1235 | else | |
1236 | usb_val = SIO_SET_DTR_LOW; | |
1237 | ||
1238 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE, | |
d2f10023 TJ |
1239 | SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface, |
1240 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1241 | ftdi_error_return(-1, "set dtr failed"); | |
a01d31e2 TJ |
1242 | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1941414d TJ |
1246 | /** |
1247 | Set rts line | |
1248 | ||
1249 | \param ftdi pointer to ftdi_context | |
1250 | \param state state to set line to (1 or 0) | |
1251 | ||
1252 | \retval 0: all fine | |
1253 | \retval -1 set rts failed | |
1254 | */ | |
a01d31e2 TJ |
1255 | int ftdi_setrts(struct ftdi_context *ftdi, int state) |
1256 | { | |
1257 | unsigned short usb_val; | |
1258 | ||
d2f10023 | 1259 | if (state) |
a01d31e2 TJ |
1260 | usb_val = SIO_SET_RTS_HIGH; |
1261 | else | |
1262 | usb_val = SIO_SET_RTS_LOW; | |
1263 | ||
d2f10023 TJ |
1264 | if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE, |
1265 | SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface, | |
1266 | NULL, 0, ftdi->usb_write_timeout) != 0) | |
1267 | ftdi_error_return(-1, "set of rts failed"); | |
a01d31e2 TJ |
1268 | |
1269 | return 0; | |
1270 | } |