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 | ***************************************************************************/ | |
16 | ||
17 | #include <usb.h> | |
18 | ||
19 | #include "ftdi.h" | |
20 | ||
948f9ada TJ |
21 | /* ftdi_init return codes: |
22 | 0: all fine | |
6d9aa99f | 23 | -1: couldn't allocate read buffer |
948f9ada | 24 | */ |
a3da1d95 GE |
25 | int ftdi_init(struct ftdi_context *ftdi) { |
26 | ftdi->usb_dev = NULL; | |
27 | ftdi->usb_timeout = 5000; | |
28 | ||
29 | ftdi->baudrate = -1; | |
30 | ftdi->bitbang_enabled = 0; | |
31 | ||
948f9ada TJ |
32 | ftdi->readbuffer = NULL; |
33 | ftdi->readbuffer_offset = 0; | |
34 | ftdi->readbuffer_remaining = 0; | |
35 | ftdi->writebuffer_chunksize = 4096; | |
36 | ||
a3da1d95 GE |
37 | ftdi->error_str = NULL; |
38 | ||
948f9ada TJ |
39 | // all fine. Now allocate the readbuffer |
40 | return ftdi_read_data_set_chunksize(ftdi, 4096); | |
41 | } | |
42 | ||
43 | ||
44 | void ftdi_deinit(struct ftdi_context *ftdi) { | |
45 | if (ftdi->readbuffer != NULL) { | |
46 | free(ftdi->readbuffer); | |
47 | ftdi->readbuffer = NULL; | |
48 | } | |
a3da1d95 GE |
49 | } |
50 | ||
51 | ||
52 | void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb) { | |
53 | ftdi->usb_dev = usb; | |
54 | } | |
55 | ||
56 | ||
57 | /* ftdi_usb_open return codes: | |
58 | 0: all fine | |
59 | -1: usb_find_busses() failed | |
60 | -2: usb_find_devices() failed | |
61 | -3: usb device not found | |
62 | -4: unable to open device | |
63 | -5: unable to claim device | |
64 | -6: reset failed | |
65 | -7: set baudrate failed | |
66 | */ | |
67 | int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product) { | |
68 | struct usb_bus *bus; | |
69 | struct usb_device *dev; | |
70 | ||
71 | usb_init(); | |
72 | ||
73 | if (usb_find_busses() < 0) { | |
74 | ftdi->error_str = "usb_find_busses() failed"; | |
75 | return -1; | |
76 | } | |
77 | ||
78 | if (usb_find_devices() < 0) { | |
79 | ftdi->error_str = "usb_find_devices() failed"; | |
80 | return -2; | |
81 | } | |
82 | ||
83 | for (bus = usb_busses; bus; bus = bus->next) { | |
84 | for (dev = bus->devices; dev; dev = dev->next) { | |
85 | if (dev->descriptor.idVendor == vendor && dev->descriptor.idProduct == product) { | |
86 | ftdi->usb_dev = usb_open(dev); | |
87 | if (ftdi->usb_dev) { | |
88 | if (usb_claim_interface(ftdi->usb_dev, 0) != 0) { | |
89 | ftdi->error_str = "unable to claim usb device. You can still use it though..."; | |
90 | return -5; | |
91 | } | |
92 | ||
93 | if (ftdi_usb_reset (ftdi) != 0) | |
94 | return -6; | |
95 | ||
96 | if (ftdi_set_baudrate (ftdi, 9600) != 0) | |
97 | return -7; | |
98 | ||
99 | return 0; | |
100 | } else { | |
101 | ftdi->error_str = "usb_open() failed"; | |
102 | return -4; | |
103 | } | |
104 | } | |
105 | } | |
106 | ||
107 | } | |
108 | ||
109 | // device not found | |
110 | return -3; | |
111 | } | |
112 | ||
113 | ||
114 | int ftdi_usb_reset(struct ftdi_context *ftdi) { | |
115 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
116 | ftdi->error_str = "FTDI reset failed"; | |
117 | return -1; | |
118 | } | |
119 | ||
bfcee05b TJ |
120 | ftdi->readbuffer_offset = 0; |
121 | ftdi->readbuffer_remaining = 0; | |
122 | ||
a3da1d95 GE |
123 | return 0; |
124 | } | |
125 | ||
a60be878 TJ |
126 | int ftdi_usb_purge_buffers(struct ftdi_context *ftdi) { |
127 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
128 | ftdi->error_str = "FTDI purge of RX buffer failed"; | |
129 | return -1; | |
130 | } | |
bfcee05b TJ |
131 | |
132 | ftdi->readbuffer_offset = 0; | |
133 | ftdi->readbuffer_remaining = 0; | |
a60be878 TJ |
134 | |
135 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 2, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
136 | ftdi->error_str = "FTDI purge of TX buffer failed"; | |
137 | return -1; | |
138 | } | |
139 | ||
140 | return 0; | |
141 | } | |
a3da1d95 GE |
142 | |
143 | /* ftdi_usb_close return codes | |
144 | 0: all fine | |
145 | -1: usb_release failed | |
146 | -2: usb_close failed | |
147 | */ | |
148 | int ftdi_usb_close(struct ftdi_context *ftdi) { | |
149 | int rtn = 0; | |
150 | ||
151 | if (usb_release_interface(ftdi->usb_dev, 0) != 0) | |
152 | rtn = -1; | |
153 | ||
154 | if (usb_close (ftdi->usb_dev) != 0) | |
155 | rtn = -2; | |
156 | ||
157 | return rtn; | |
158 | } | |
159 | ||
160 | ||
161 | /* | |
162 | ftdi_set_baudrate return codes: | |
163 | 0: all fine | |
164 | -1: invalid baudrate | |
165 | -2: setting baudrate failed | |
166 | */ | |
167 | int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate) { | |
168 | unsigned short ftdi_baudrate; | |
169 | ||
170 | if (ftdi->bitbang_enabled) { | |
171 | baudrate = baudrate*4; | |
172 | } | |
173 | ||
174 | switch (baudrate) { | |
175 | case 300: | |
176 | ftdi_baudrate = 0x2710; | |
177 | break; | |
178 | case 600: | |
179 | ftdi_baudrate = 0x1388; | |
180 | break; | |
181 | case 1200: | |
182 | ftdi_baudrate = 0x09C4; | |
183 | break; | |
184 | case 2400: | |
185 | ftdi_baudrate = 0x04E2; | |
186 | break; | |
187 | case 4800: | |
188 | ftdi_baudrate = 0x0271; | |
189 | break; | |
190 | case 9600: | |
191 | ftdi_baudrate = 0x4138; | |
192 | break; | |
193 | case 19200: | |
194 | ftdi_baudrate = 0x809C; | |
195 | break; | |
196 | case 38400: | |
197 | ftdi_baudrate = 0xC04E; | |
198 | break; | |
199 | case 57600: | |
200 | ftdi_baudrate = 0x0034; | |
201 | break; | |
202 | case 115200: | |
203 | ftdi_baudrate = 0x001A; | |
204 | break; | |
205 | case 230400: | |
206 | ftdi_baudrate = 0x000D; | |
207 | break; | |
208 | case 460800: | |
209 | ftdi_baudrate = 0x4006; | |
210 | break; | |
211 | case 921600: | |
212 | ftdi_baudrate = 0x8003; | |
213 | break; | |
214 | default: | |
215 | ftdi->error_str = "Unknown baudrate. Note: bitbang baudrates are automatically multiplied by 4"; | |
216 | return -1; | |
217 | } | |
218 | ||
219 | if (usb_control_msg(ftdi->usb_dev, 0x40, 3, ftdi_baudrate, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
220 | ftdi->error_str = "Setting new baudrate failed"; | |
221 | return -2; | |
222 | } | |
223 | ||
224 | ftdi->baudrate = baudrate; | |
225 | return 0; | |
226 | } | |
227 | ||
228 | ||
be5d7eec | 229 | int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size) { |
a3da1d95 GE |
230 | int ret; |
231 | int offset = 0; | |
232 | while (offset < size) { | |
948f9ada | 233 | int write_size = ftdi->writebuffer_chunksize; |
a3da1d95 GE |
234 | |
235 | if (offset+write_size > size) | |
236 | write_size = size-offset; | |
237 | ||
238 | ret=usb_bulk_write(ftdi->usb_dev, 2, buf+offset, write_size, ftdi->usb_timeout); | |
cbabb7d3 TJ |
239 | if (ret == -1) { |
240 | ftdi->error_str = "bulk write failed"; | |
a3da1d95 | 241 | return -1; |
cbabb7d3 | 242 | } |
a3da1d95 GE |
243 | |
244 | offset += write_size; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | ||
948f9ada TJ |
251 | int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) { |
252 | ftdi->writebuffer_chunksize = chunksize; | |
253 | return 0; | |
254 | } | |
255 | ||
256 | ||
257 | int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) { | |
258 | *chunksize = ftdi->writebuffer_chunksize; | |
259 | return 0; | |
260 | } | |
cbabb7d3 | 261 | |
948f9ada TJ |
262 | |
263 | int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) { | |
264 | int offset = 0, ret = 1; | |
265 | ||
266 | // everything we want is still in the readbuffer? | |
267 | if (size <= ftdi->readbuffer_remaining) { | |
268 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size); | |
269 | ||
270 | // Fix offsets | |
271 | ftdi->readbuffer_remaining -= size; | |
272 | ftdi->readbuffer_offset += size; | |
273 | ||
274 | // printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); | |
275 | ||
276 | return size; | |
979a145c | 277 | } |
948f9ada TJ |
278 | |
279 | // something still in the readbuffer, but not enough to satisfy 'size'? | |
280 | if (ftdi->readbuffer_remaining != 0) { | |
281 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining); | |
979a145c | 282 | |
948f9ada TJ |
283 | // printf("Got bytes from buffer: %d\n", ftdi->readbuffer_remaining); |
284 | ||
4ece2c24 | 285 | // Fix offset |
948f9ada | 286 | offset += ftdi->readbuffer_remaining; |
948f9ada TJ |
287 | } |
288 | ||
289 | // do the actual USB read | |
cbabb7d3 | 290 | while (offset < size && ret > 0) { |
948f9ada TJ |
291 | ftdi->readbuffer_remaining = 0; |
292 | ftdi->readbuffer_offset = 0; | |
293 | ret = usb_bulk_read (ftdi->usb_dev, 0x81, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_timeout); | |
cbabb7d3 TJ |
294 | |
295 | if (ret == -1) { | |
296 | ftdi->error_str = "bulk read failed"; | |
297 | return -1; | |
298 | } | |
299 | ||
948f9ada TJ |
300 | if (ret > 2) { |
301 | // skip FTDI status bytes. | |
302 | // Maybe stored in the future to enable modem use | |
303 | ftdi->readbuffer_offset += 2; | |
304 | ret -= 2; | |
305 | } else if (ret <= 2) { | |
306 | // no more data to read? | |
307 | return offset; | |
308 | } | |
309 | ||
310 | if (ret > 0) { | |
311 | // data still fits in buf? | |
312 | if (offset+ret <= size) { | |
313 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret); | |
314 | offset += ret; | |
315 | ||
316 | if (offset == size) | |
317 | return offset; | |
318 | } else { | |
319 | // only copy part of the data or size <= readbuffer_chunksize | |
320 | int part_size = size-offset; | |
321 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size); | |
322 | ||
323 | ftdi->readbuffer_offset += part_size; | |
324 | ftdi->readbuffer_remaining = ret-part_size; | |
4ece2c24 | 325 | offset += part_size; |
948f9ada TJ |
326 | |
327 | // printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n", part_size, size, offset, ret, ftdi->readbuffer_remaining); | |
328 | ||
4ece2c24 | 329 | return offset; |
948f9ada TJ |
330 | } |
331 | } | |
cbabb7d3 TJ |
332 | } |
333 | ||
948f9ada TJ |
334 | // never reached |
335 | return -2; | |
a3da1d95 GE |
336 | } |
337 | ||
338 | ||
948f9ada TJ |
339 | int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) { |
340 | // Invalidate all remaining data | |
341 | ftdi->readbuffer_offset = 0; | |
342 | ftdi->readbuffer_remaining = 0; | |
343 | ||
344 | unsigned char *new_buf; | |
345 | if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) { | |
346 | ftdi->error_str = "out of memory for readbuffer"; | |
347 | return -1; | |
348 | } | |
349 | ||
350 | ftdi->readbuffer = new_buf; | |
351 | ftdi->readbuffer_chunksize = chunksize; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | ||
357 | int ftdi_readt_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) { | |
358 | *chunksize = ftdi->readbuffer_chunksize; | |
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
363 | ||
a3da1d95 GE |
364 | int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask) { |
365 | unsigned short usb_val; | |
366 | ||
367 | usb_val = bitmask; // low byte: bitmask | |
368 | usb_val += 1 << 8; // high byte: enable flag | |
369 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, usb_val, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
370 | ftdi->error_str = "Unable to enter bitbang mode. Perhaps not a BM type chip?"; | |
371 | return -1; | |
372 | } | |
373 | ||
374 | ftdi->bitbang_enabled = 1; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | ||
379 | int ftdi_disable_bitbang(struct ftdi_context *ftdi) { | |
380 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, 0, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
381 | ftdi->error_str = "Unable to leave bitbang mode. Perhaps not a BM type chip?"; | |
382 | return -1; | |
383 | } | |
384 | ||
385 | ftdi->bitbang_enabled = 0; | |
386 | return 0; | |
387 | } | |
388 | ||
389 | ||
390 | int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins) { | |
391 | unsigned short usb_val; | |
392 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0C, 0, 0, (char *)&usb_val, 1, ftdi->usb_timeout) != 1) { | |
393 | ftdi->error_str = "Read pins failed"; | |
394 | return -1; | |
395 | } | |
396 | ||
397 | *pins = (unsigned char)usb_val; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | ||
402 | int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency) { | |
403 | unsigned short usb_val; | |
404 | ||
405 | if (latency < 1) { | |
406 | ftdi->error_str = "Latency out of range. Only valid for 1-255"; | |
407 | return -1; | |
408 | } | |
409 | ||
d79d2e68 | 410 | usb_val = latency; |
a3da1d95 GE |
411 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x09, usb_val, 0, NULL, 0, ftdi->usb_timeout) != 0) { |
412 | ftdi->error_str = "Unable to set latency timer"; | |
413 | return -2; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | ||
419 | int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency) { | |
420 | unsigned short usb_val; | |
f14c8bc6 | 421 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0A, 0, 0, (char *)&usb_val, 1, ftdi->usb_timeout) != 1) { |
a3da1d95 GE |
422 | ftdi->error_str = "Reading latency timer failed"; |
423 | return -1; | |
424 | } | |
425 | ||
426 | *latency = (unsigned char)usb_val; | |
427 | return 0; | |
428 | } | |
429 | ||
430 | ||
b8aa7b35 TJ |
431 | void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom) { |
432 | eeprom->vendor_id = 0403; | |
433 | eeprom->product_id = 6001; | |
434 | ||
435 | eeprom->self_powered = 1; | |
436 | eeprom->remote_wakeup = 1; | |
437 | eeprom->BM_type_chip = 1; | |
438 | ||
439 | eeprom->in_is_isochronous = 0; | |
440 | eeprom->out_is_isochronous = 0; | |
441 | eeprom->suspend_pull_downs = 0; | |
442 | ||
443 | eeprom->use_serial = 0; | |
444 | eeprom->change_usb_version = 0; | |
445 | eeprom->usb_version = 200; | |
446 | eeprom->max_power = 0; | |
447 | ||
448 | eeprom->manufacturer = NULL; | |
449 | eeprom->product = NULL; | |
450 | eeprom->serial = NULL; | |
451 | } | |
452 | ||
453 | ||
454 | /* | |
455 | ftdi_eeprom_build return codes: | |
8ed61121 | 456 | positive value: used eeprom size |
b8aa7b35 TJ |
457 | -1: eeprom size (128 bytes) exceeded by custom strings |
458 | */ | |
459 | int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output) { | |
460 | unsigned char i, j; | |
461 | unsigned short checksum, value; | |
462 | unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0; | |
463 | int size_check; | |
464 | ||
465 | if (eeprom->manufacturer != NULL) | |
466 | manufacturer_size = strlen(eeprom->manufacturer); | |
467 | if (eeprom->product != NULL) | |
468 | product_size = strlen(eeprom->product); | |
469 | if (eeprom->serial != NULL) | |
470 | serial_size = strlen(eeprom->serial); | |
471 | ||
472 | size_check = 128; // eeprom is 128 bytes | |
473 | size_check -= 28; // 28 are always in use (fixed) | |
474 | size_check -= manufacturer_size*2; | |
475 | size_check -= product_size*2; | |
476 | size_check -= serial_size*2; | |
477 | ||
478 | // eeprom size exceeded? | |
479 | if (size_check < 0) | |
480 | return (-1); | |
481 | ||
482 | // empty eeprom | |
483 | memset (output, 0, 128); | |
484 | ||
485 | // Addr 00: Stay 00 00 | |
486 | // Addr 02: Vendor ID | |
487 | output[0x02] = eeprom->vendor_id; | |
488 | output[0x03] = eeprom->vendor_id >> 8; | |
489 | ||
490 | // Addr 04: Product ID | |
491 | output[0x04] = eeprom->product_id; | |
492 | output[0x05] = eeprom->product_id >> 8; | |
493 | ||
494 | // Addr 06: Device release number (0400h for BM features) | |
495 | output[0x06] = 0x00; | |
496 | ||
497 | if (eeprom->BM_type_chip == 1) | |
498 | output[0x07] = 0x04; | |
499 | else | |
500 | output[0x07] = 0x02; | |
501 | ||
502 | // Addr 08: Config descriptor | |
503 | // Bit 1: remote wakeup if 1 | |
504 | // Bit 0: self powered if 1 | |
505 | // | |
506 | j = 0; | |
507 | if (eeprom->self_powered == 1) | |
508 | j = j | 1; | |
509 | if (eeprom->remote_wakeup == 1) | |
510 | j = j | 2; | |
511 | output[0x08] = j; | |
512 | ||
513 | // Addr 09: Max power consumption: max power = value * 2 mA | |
514 | output[0x09] = eeprom->max_power;; | |
515 | ||
516 | // Addr 0A: Chip configuration | |
517 | // Bit 7: 0 - reserved | |
518 | // Bit 6: 0 - reserved | |
519 | // Bit 5: 0 - reserved | |
520 | // Bit 4: 1 - Change USB version | |
521 | // Bit 3: 1 - Use the serial number string | |
522 | // Bit 2: 1 - Enable suspend pull downs for lower power | |
523 | // Bit 1: 1 - Out EndPoint is Isochronous | |
524 | // Bit 0: 1 - In EndPoint is Isochronous | |
525 | // | |
526 | j = 0; | |
527 | if (eeprom->in_is_isochronous == 1) | |
528 | j = j | 1; | |
529 | if (eeprom->out_is_isochronous == 1) | |
530 | j = j | 2; | |
531 | if (eeprom->suspend_pull_downs == 1) | |
532 | j = j | 4; | |
533 | if (eeprom->use_serial == 1) | |
534 | j = j | 8; | |
535 | if (eeprom->change_usb_version == 1) | |
536 | j = j | 16; | |
537 | output[0x0A] = j; | |
538 | ||
539 | // Addr 0B: reserved | |
540 | output[0x0B] = 0x00; | |
541 | ||
542 | // Addr 0C: USB version low byte when 0x0A bit 4 is set | |
543 | // Addr 0D: USB version high byte when 0x0A bit 4 is set | |
544 | if (eeprom->change_usb_version == 1) { | |
545 | output[0x0C] = eeprom->usb_version; | |
546 | output[0x0D] = eeprom->usb_version >> 8; | |
547 | } | |
548 | ||
549 | ||
550 | // Addr 0E: Offset of the manufacturer string + 0x80 | |
551 | output[0x0E] = 0x14 + 0x80; | |
552 | ||
553 | // Addr 0F: Length of manufacturer string | |
554 | output[0x0F] = manufacturer_size*2 + 2; | |
555 | ||
556 | // Addr 10: Offset of the product string + 0x80, calculated later | |
557 | // Addr 11: Length of product string | |
558 | output[0x11] = product_size*2 + 2; | |
559 | ||
560 | // Addr 12: Offset of the serial string + 0x80, calculated later | |
561 | // Addr 13: Length of serial string | |
562 | output[0x13] = serial_size*2 + 2; | |
563 | ||
564 | // Dynamic content | |
a862ddcf | 565 | output[0x14] = manufacturer_size*2 + 2; |
b8aa7b35 TJ |
566 | output[0x15] = 0x03; // type: string |
567 | ||
568 | i = 0x16, j = 0; | |
569 | ||
570 | // Output manufacturer | |
571 | for (j = 0; j < manufacturer_size; j++) { | |
572 | output[i] = eeprom->manufacturer[j], i++; | |
573 | output[i] = 0x00, i++; | |
574 | } | |
575 | ||
576 | // Output product name | |
577 | output[0x10] = i + 0x80; // calculate offset | |
578 | output[i] = product_size*2 + 2, i++; | |
579 | output[i] = 0x03, i++; | |
580 | for (j = 0; j < product_size; j++) { | |
581 | output[i] = eeprom->product[j], i++; | |
582 | output[i] = 0x00, i++; | |
583 | } | |
584 | ||
585 | // Output serial | |
586 | output[0x12] = i + 0x80; // calculate offset | |
587 | output[i] = serial_size*2 + 2, i++; | |
588 | output[i] = 0x03, i++; | |
589 | for (j = 0; j < serial_size; j++) { | |
590 | output[i] = eeprom->serial[j], i++; | |
591 | output[i] = 0x00, i++; | |
592 | } | |
593 | ||
594 | // calculate checksum | |
595 | checksum = 0xAAAA; | |
596 | ||
597 | for (i = 0; i < 63; i++) { | |
598 | value = output[i*2]; | |
599 | value += output[(i*2)+1] << 8; | |
600 | ||
601 | checksum = value^checksum; | |
602 | checksum = (checksum << 1) | (checksum >> 15); | |
603 | } | |
604 | ||
605 | output[0x7E] = checksum; | |
606 | output[0x7F] = checksum >> 8; | |
607 | ||
8ed61121 | 608 | return size_check; |
b8aa7b35 TJ |
609 | } |
610 | ||
611 | ||
be5d7eec | 612 | int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) { |
a3da1d95 GE |
613 | int i; |
614 | ||
615 | for (i = 0; i < 64; i++) { | |
616 | if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x90, 0, i, eeprom+(i*2), 2, ftdi->usb_timeout) != 2) { | |
617 | ftdi->error_str = "Reading eeprom failed"; | |
618 | return -1; | |
619 | } | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | ||
be5d7eec | 626 | int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) { |
a3da1d95 GE |
627 | unsigned short usb_val; |
628 | int i; | |
629 | ||
630 | for (i = 0; i < 64; i++) { | |
631 | usb_val = eeprom[i*2]; | |
632 | usb_val += eeprom[(i*2)+1] << 8; | |
633 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x91, usb_val, i, NULL, 0, ftdi->usb_timeout) != 0) { | |
634 | ftdi->error_str = "Unable to write eeprom"; | |
635 | return -1; | |
636 | } | |
637 | } | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | ||
643 | int ftdi_erase_eeprom(struct ftdi_context *ftdi) { | |
644 | if (usb_control_msg(ftdi->usb_dev, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_timeout) != 0) { | |
645 | ftdi->error_str = "Unable to erase eeprom"; | |
646 | return -1; | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } |