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 | ***************************************************************************/ | |
0e302db6 | 16 | #define _GNU_SOURCE |
d9f0cce7 | 17 | |
a3da1d95 | 18 | #include "ftdi.h" |
0e302db6 TJ |
19 | #include <sys/ioctl.h> |
20 | #include <sys/time.h> | |
0e302db6 | 21 | #include <sys/stat.h> |
a97980ad TJ |
22 | #include <fcntl.h> |
23 | #include <dirent.h> | |
0e302db6 TJ |
24 | |
25 | /* Internal USB devfs functions. Do not use outside libftdi */ | |
a97980ad TJ |
26 | |
27 | /* Those two functions are borrowed from "usbstress" */ | |
28 | static int ftdi_usbdev_parsedev(int fd, unsigned int *bus, unsigned int *dev, int vendorid, int productid); | |
29 | int ftdi_usbdev_open(int vendorid, int productid); | |
30 | ||
31 | int ftdi_usbdev_claim_interface(int fd, unsigned int interface); | |
32 | int ftdi_usbdev_release_interface(int fd, int interface); | |
33 | int ftdi_usbdev_bulk_write(int fd, unsigned int endpoint, const void *data, | |
34 | unsigned int size, unsigned int timeout); | |
35 | int ftdi_usbdev_control_msg(int fd, unsigned int requesttype, unsigned int request, | |
36 | unsigned int value, unsigned int index, | |
37 | void *data, unsigned int size, unsigned int timeout); | |
38 | struct usbdevfs_urb * ftdi_usbdev_alloc_urb(int iso_packets); | |
39 | int ftdi_usbdev_submit_urb(int fd, struct usbdevfs_urb *urb); | |
40 | int ftdi_usbdev_reap_urb_ndelay(int fd, struct usbdevfs_urb **urb_return); | |
0e302db6 | 41 | |
a3da1d95 | 42 | |
948f9ada TJ |
43 | /* ftdi_init return codes: |
44 | 0: all fine | |
6d9aa99f | 45 | -1: couldn't allocate read buffer |
948f9ada | 46 | */ |
0e302db6 TJ |
47 | int ftdi_init(struct ftdi_context *ftdi) |
48 | { | |
a97980ad | 49 | ftdi->usb_fd = -1; |
545820ce TJ |
50 | ftdi->usb_read_timeout = 5000; |
51 | ftdi->usb_write_timeout = 5000; | |
a3da1d95 | 52 | |
53ad271d | 53 | ftdi->type = TYPE_BM; /* chip type */ |
a3da1d95 GE |
54 | ftdi->baudrate = -1; |
55 | ftdi->bitbang_enabled = 0; | |
56 | ||
948f9ada TJ |
57 | ftdi->readbuffer = NULL; |
58 | ftdi->readbuffer_offset = 0; | |
59 | ftdi->readbuffer_remaining = 0; | |
60 | ftdi->writebuffer_chunksize = 4096; | |
61 | ||
545820ce TJ |
62 | ftdi->interface = 0; |
63 | ftdi->index = 0; | |
64 | ftdi->in_ep = 0x02; | |
65 | ftdi->out_ep = 0x81; | |
3119537f | 66 | ftdi->bitbang_mode = 1; /* 1: Normal bitbang mode, 2: SPI bitbang mode */ |
53ad271d | 67 | |
a3da1d95 GE |
68 | ftdi->error_str = NULL; |
69 | ||
0e302db6 TJ |
70 | ftdi->urb = ftdi_usbdev_alloc_urb(0); |
71 | if (!ftdi->urb) { | |
72 | ftdi->error_str = "out of memory for read URB"; | |
73 | return -1; | |
74 | } | |
75 | ||
948f9ada TJ |
76 | // all fine. Now allocate the readbuffer |
77 | return ftdi_read_data_set_chunksize(ftdi, 4096); | |
78 | } | |
79 | ||
80 | ||
0e302db6 TJ |
81 | void ftdi_deinit(struct ftdi_context *ftdi) |
82 | { | |
948f9ada | 83 | if (ftdi->readbuffer != NULL) { |
d9f0cce7 TJ |
84 | free(ftdi->readbuffer); |
85 | ftdi->readbuffer = NULL; | |
948f9ada | 86 | } |
0e302db6 TJ |
87 | |
88 | if (ftdi->urb != NULL) { | |
89 | free (ftdi->urb); | |
90 | ftdi->urb = NULL; | |
91 | } | |
a3da1d95 GE |
92 | } |
93 | ||
a3da1d95 GE |
94 | /* ftdi_usb_open return codes: |
95 | 0: all fine | |
a97980ad TJ |
96 | -1: usb device not found or unable to open |
97 | -2: unable to claim device | |
98 | -3: reset failed | |
99 | -4: set baudrate failed | |
a3da1d95 GE |
100 | */ |
101 | int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product) { | |
a97980ad TJ |
102 | if ((ftdi->usb_fd = ftdi_usbdev_open(vendor, product)) < 0) { |
103 | ftdi->error_str = "Device not found or unable to open it (permission problem?)"; | |
104 | ftdi->usb_fd = -1; | |
105 | return -1; | |
106 | } | |
107 | ||
108 | if (ftdi_usbdev_claim_interface(ftdi->usb_fd, ftdi->interface) != 0) { | |
109 | ftdi->error_str = "unable to claim usb device. Make sure ftdi_sio is unloaded!"; | |
110 | close (ftdi->usb_fd); | |
111 | ftdi->usb_fd = -1; | |
a3da1d95 GE |
112 | return -2; |
113 | } | |
114 | ||
a97980ad TJ |
115 | if (ftdi_usb_reset (ftdi) != 0) |
116 | return -6; | |
a3da1d95 | 117 | |
a97980ad TJ |
118 | if (ftdi_set_baudrate (ftdi, 9600) != 0) |
119 | return -7; | |
a3da1d95 | 120 | |
a97980ad TJ |
121 | /* |
122 | // Try to guess chip type | |
123 | // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0 | |
124 | if (dev->descriptor.bcdDevice == 0x400 || (dev->descriptor.bcdDevice == 0x200 | |
125 | && dev->descriptor.iSerialNumber == 0)) | |
126 | ftdi->type = TYPE_BM; | |
127 | else if (dev->descriptor.bcdDevice == 0x200) | |
128 | ftdi->type = TYPE_AM; | |
129 | else if (dev->descriptor.bcdDevice == 0x500) | |
130 | ftdi->type = TYPE_2232C; | |
131 | */ | |
132 | return 0; | |
a3da1d95 GE |
133 | } |
134 | ||
135 | ||
136 | int ftdi_usb_reset(struct ftdi_context *ftdi) { | |
a97980ad | 137 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a3da1d95 GE |
138 | ftdi->error_str = "FTDI reset failed"; |
139 | return -1; | |
140 | } | |
545820ce | 141 | // Invalidate data in the readbuffer |
bfcee05b TJ |
142 | ftdi->readbuffer_offset = 0; |
143 | ftdi->readbuffer_remaining = 0; | |
144 | ||
a3da1d95 GE |
145 | return 0; |
146 | } | |
147 | ||
a60be878 | 148 | int ftdi_usb_purge_buffers(struct ftdi_context *ftdi) { |
a97980ad | 149 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a60be878 TJ |
150 | ftdi->error_str = "FTDI purge of RX buffer failed"; |
151 | return -1; | |
152 | } | |
545820ce | 153 | // Invalidate data in the readbuffer |
bfcee05b TJ |
154 | ftdi->readbuffer_offset = 0; |
155 | ftdi->readbuffer_remaining = 0; | |
a60be878 | 156 | |
a97980ad | 157 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0, 2, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a60be878 TJ |
158 | ftdi->error_str = "FTDI purge of TX buffer failed"; |
159 | return -1; | |
160 | } | |
161 | ||
545820ce | 162 | |
a60be878 TJ |
163 | return 0; |
164 | } | |
a3da1d95 GE |
165 | |
166 | /* ftdi_usb_close return codes | |
167 | 0: all fine | |
a97980ad TJ |
168 | -1: ftdi_usb_release failed |
169 | -2: close failed | |
a3da1d95 GE |
170 | */ |
171 | int ftdi_usb_close(struct ftdi_context *ftdi) { | |
172 | int rtn = 0; | |
173 | ||
a97980ad TJ |
174 | if (ftdi_usbdev_release_interface(ftdi->usb_fd, ftdi->interface) != 0) { |
175 | ftdi->error_str = "Unable to release interface"; | |
a3da1d95 | 176 | rtn = -1; |
a97980ad TJ |
177 | } |
178 | ||
179 | ||
180 | if (close (ftdi->usb_fd) != 0) { | |
181 | ftdi->error_str = "Unable to close file descriptor"; | |
a3da1d95 | 182 | rtn = -2; |
a97980ad TJ |
183 | } |
184 | ||
a3da1d95 GE |
185 | return rtn; |
186 | } | |
187 | ||
188 | ||
189 | /* | |
53ad271d TJ |
190 | ftdi_convert_baudrate returns nearest supported baud rate to that requested. |
191 | Function is only used internally | |
192 | */ | |
0126d22e | 193 | static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi, |
53ad271d TJ |
194 | unsigned short *value, unsigned short *index) { |
195 | static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1}; | |
196 | static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3}; | |
197 | static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7}; | |
198 | int divisor, best_divisor, best_baud, best_baud_diff; | |
199 | unsigned long encoded_divisor; | |
200 | int i; | |
201 | ||
202 | if (baudrate <= 0) { | |
203 | // Return error | |
204 | return -1; | |
205 | } | |
206 | ||
207 | divisor = 24000000 / baudrate; | |
208 | ||
0126d22e | 209 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
210 | // Round down to supported fraction (AM only) |
211 | divisor -= am_adjust_dn[divisor & 7]; | |
212 | } | |
213 | ||
214 | // Try this divisor and the one above it (because division rounds down) | |
215 | best_divisor = 0; | |
216 | best_baud = 0; | |
217 | best_baud_diff = 0; | |
218 | for (i = 0; i < 2; i++) { | |
219 | int try_divisor = divisor + i; | |
220 | int baud_estimate; | |
221 | int baud_diff; | |
222 | ||
223 | // Round up to supported divisor value | |
224 | if (try_divisor < 8) { | |
225 | // Round up to minimum supported divisor | |
226 | try_divisor = 8; | |
0126d22e | 227 | } else if (ftdi->type != TYPE_AM && try_divisor < 12) { |
53ad271d TJ |
228 | // BM doesn't support divisors 9 through 11 inclusive |
229 | try_divisor = 12; | |
230 | } else if (divisor < 16) { | |
231 | // AM doesn't support divisors 9 through 15 inclusive | |
232 | try_divisor = 16; | |
233 | } else { | |
0126d22e | 234 | if (ftdi->type == TYPE_AM) { |
53ad271d TJ |
235 | // Round up to supported fraction (AM only) |
236 | try_divisor += am_adjust_up[try_divisor & 7]; | |
237 | if (try_divisor > 0x1FFF8) { | |
238 | // Round down to maximum supported divisor value (for AM) | |
239 | try_divisor = 0x1FFF8; | |
240 | } | |
241 | } else { | |
242 | if (try_divisor > 0x1FFFF) { | |
243 | // Round down to maximum supported divisor value (for BM) | |
244 | try_divisor = 0x1FFFF; | |
245 | } | |
246 | } | |
247 | } | |
248 | // Get estimated baud rate (to nearest integer) | |
249 | baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor; | |
250 | // Get absolute difference from requested baud rate | |
251 | if (baud_estimate < baudrate) { | |
252 | baud_diff = baudrate - baud_estimate; | |
253 | } else { | |
254 | baud_diff = baud_estimate - baudrate; | |
255 | } | |
256 | if (i == 0 || baud_diff < best_baud_diff) { | |
257 | // Closest to requested baud rate so far | |
258 | best_divisor = try_divisor; | |
259 | best_baud = baud_estimate; | |
260 | best_baud_diff = baud_diff; | |
261 | if (baud_diff == 0) { | |
262 | // Spot on! No point trying | |
263 | break; | |
264 | } | |
265 | } | |
266 | } | |
267 | // Encode the best divisor value | |
268 | encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14); | |
269 | // Deal with special cases for encoded value | |
270 | if (encoded_divisor == 1) { | |
271 | encoded_divisor = 0; // 3000000 baud | |
272 | } else if (encoded_divisor == 0x4001) { | |
273 | encoded_divisor = 1; // 2000000 baud (BM only) | |
274 | } | |
275 | // Split into "value" and "index" values | |
276 | *value = (unsigned short)(encoded_divisor & 0xFFFF); | |
de22df10 | 277 | if(ftdi->type == TYPE_2232C) { |
0126d22e TJ |
278 | *index = (unsigned short)(encoded_divisor >> 8); |
279 | *index &= 0xFF00; | |
280 | *index |= ftdi->interface; | |
281 | } | |
282 | else | |
283 | *index = (unsigned short)(encoded_divisor >> 16); | |
284 | ||
53ad271d TJ |
285 | // Return the nearest baud rate |
286 | return best_baud; | |
287 | } | |
288 | ||
289 | /* | |
a3da1d95 GE |
290 | ftdi_set_baudrate return codes: |
291 | 0: all fine | |
292 | -1: invalid baudrate | |
293 | -2: setting baudrate failed | |
294 | */ | |
295 | int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate) { | |
53ad271d TJ |
296 | unsigned short value, index; |
297 | int actual_baudrate; | |
a3da1d95 GE |
298 | |
299 | if (ftdi->bitbang_enabled) { | |
300 | baudrate = baudrate*4; | |
301 | } | |
302 | ||
25707904 | 303 | actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index); |
53ad271d TJ |
304 | if (actual_baudrate <= 0) { |
305 | ftdi->error_str = "Silly baudrate <= 0."; | |
a3da1d95 GE |
306 | return -1; |
307 | } | |
308 | ||
53ad271d TJ |
309 | // Check within tolerance (about 5%) |
310 | if ((actual_baudrate * 2 < baudrate /* Catch overflows */ ) | |
311 | || ((actual_baudrate < baudrate) | |
312 | ? (actual_baudrate * 21 < baudrate * 20) | |
313 | : (baudrate * 21 < actual_baudrate * 20))) { | |
314 | ftdi->error_str = "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4"; | |
315 | return -1; | |
316 | } | |
545820ce | 317 | |
a97980ad | 318 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 3, value, index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a3da1d95 GE |
319 | ftdi->error_str = "Setting new baudrate failed"; |
320 | return -2; | |
321 | } | |
322 | ||
323 | ftdi->baudrate = baudrate; | |
324 | return 0; | |
325 | } | |
326 | ||
327 | ||
be5d7eec | 328 | int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size) { |
a3da1d95 GE |
329 | int ret; |
330 | int offset = 0; | |
545820ce | 331 | int total_written = 0; |
a3da1d95 | 332 | while (offset < size) { |
948f9ada | 333 | int write_size = ftdi->writebuffer_chunksize; |
a3da1d95 GE |
334 | |
335 | if (offset+write_size > size) | |
336 | write_size = size-offset; | |
337 | ||
a97980ad | 338 | ret = ftdi_usbdev_bulk_write(ftdi->usb_fd, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout); |
cbabb7d3 | 339 | if (ret == -1) { |
d9f0cce7 | 340 | ftdi->error_str = "bulk write failed"; |
a3da1d95 | 341 | return -1; |
d9f0cce7 | 342 | } |
545820ce | 343 | total_written += ret; |
a3da1d95 GE |
344 | |
345 | offset += write_size; | |
346 | } | |
347 | ||
545820ce | 348 | return total_written; |
a3da1d95 GE |
349 | } |
350 | ||
351 | ||
948f9ada TJ |
352 | int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) { |
353 | ftdi->writebuffer_chunksize = chunksize; | |
354 | return 0; | |
355 | } | |
356 | ||
357 | ||
358 | int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) { | |
359 | *chunksize = ftdi->writebuffer_chunksize; | |
360 | return 0; | |
361 | } | |
cbabb7d3 | 362 | |
948f9ada TJ |
363 | |
364 | int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) { | |
0e302db6 TJ |
365 | struct timeval tv, tv_ref, tv_now; |
366 | struct usbdevfs_urb *returned_urb; | |
367 | int offset = 0, ret = 1, waiting; | |
d9f0cce7 | 368 | |
948f9ada TJ |
369 | // everything we want is still in the readbuffer? |
370 | if (size <= ftdi->readbuffer_remaining) { | |
d9f0cce7 TJ |
371 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size); |
372 | ||
373 | // Fix offsets | |
374 | ftdi->readbuffer_remaining -= size; | |
375 | ftdi->readbuffer_offset += size; | |
376 | ||
545820ce | 377 | /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */ |
d9f0cce7 TJ |
378 | |
379 | return size; | |
979a145c | 380 | } |
948f9ada TJ |
381 | // something still in the readbuffer, but not enough to satisfy 'size'? |
382 | if (ftdi->readbuffer_remaining != 0) { | |
d9f0cce7 | 383 | memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining); |
979a145c | 384 | |
d9f0cce7 TJ |
385 | // Fix offset |
386 | offset += ftdi->readbuffer_remaining; | |
948f9ada | 387 | } |
0e302db6 | 388 | |
948f9ada | 389 | // do the actual USB read |
cbabb7d3 | 390 | while (offset < size && ret > 0) { |
d9f0cce7 TJ |
391 | ftdi->readbuffer_remaining = 0; |
392 | ftdi->readbuffer_offset = 0; | |
0e302db6 | 393 | |
0e302db6 TJ |
394 | /* Real userspace URB processing to cope with |
395 | a race condition where two or more status bytes | |
396 | could already be in the kernel USB buffer */ | |
397 | memset(ftdi->urb, 0, sizeof(struct usbdevfs_urb)); | |
398 | ||
399 | ftdi->urb->type = USBDEVFS_URB_TYPE_BULK; | |
400 | ftdi->urb->endpoint = ftdi->out_ep | USB_DIR_IN; | |
401 | ftdi->urb->buffer = ftdi->readbuffer; | |
402 | ftdi->urb->buffer_length = ftdi->readbuffer_chunksize; | |
403 | ||
404 | /* Submit URB to USB layer */ | |
a97980ad | 405 | if (ftdi_usbdev_submit_urb(ftdi->usb_fd, ftdi->urb) == -1) { |
0e302db6 | 406 | ftdi->error_str = "ftdi_usbdev_submit_urb for bulk read failed"; |
cbabb7d3 | 407 | return -1; |
d9f0cce7 | 408 | } |
0e302db6 TJ |
409 | |
410 | /* Wait for the result to come in. | |
411 | Timer stuff is borrowed from libusb's interrupt transfer */ | |
412 | gettimeofday(&tv_ref, NULL); | |
413 | tv_ref.tv_sec = tv_ref.tv_sec + ftdi->usb_read_timeout / 1000; | |
414 | tv_ref.tv_usec = tv_ref.tv_usec + (ftdi->usb_read_timeout % 1000) * 1000; | |
415 | ||
416 | if (tv_ref.tv_usec > 1e6) { | |
417 | tv_ref.tv_usec -= 1e6; | |
418 | tv_ref.tv_sec++; | |
419 | } | |
420 | ||
421 | waiting = 1; | |
422 | memset (&tv, 0, sizeof (struct timeval)); | |
a97980ad | 423 | while (((ret = ftdi_usbdev_reap_urb_ndelay(ftdi->usb_fd, &returned_urb)) == -1) && waiting) { |
0e302db6 TJ |
424 | tv.tv_sec = 0; |
425 | tv.tv_usec = 1000; // 1 msec | |
426 | select(0, NULL, NULL, NULL, &tv); //sub second wait | |
427 | ||
428 | /* compare with actual time, as the select timeout is not that precise */ | |
429 | gettimeofday(&tv_now, NULL); | |
430 | ||
431 | if ((tv_now.tv_sec > tv_ref.tv_sec) || | |
432 | ((tv_now.tv_sec == tv_ref.tv_sec) && (tv_now.tv_usec >= tv_ref.tv_usec))) | |
433 | waiting = 0; | |
434 | } | |
435 | ||
436 | if (!waiting) { | |
437 | ftdi->error_str = "timeout during ftdi_read_data"; | |
438 | return -1; | |
439 | } | |
440 | ||
441 | if (ret < 0) { | |
442 | ftdi->error_str = "ftdi_usbdev_reap_urb for bulk read failed"; | |
443 | return -1; | |
444 | } | |
445 | ||
446 | if (returned_urb->status) { | |
447 | ftdi->error_str = "URB return status not OK"; | |
448 | return -1; | |
449 | } | |
450 | ||
451 | /* Paranoia check */ | |
452 | if (returned_urb->buffer != ftdi->readbuffer) { | |
453 | ftdi->error_str = "buffer paranoia check failed"; | |
454 | return -1; | |
455 | } | |
456 | ||
457 | ret = returned_urb->actual_length; | |
d9f0cce7 TJ |
458 | if (ret > 2) { |
459 | // skip FTDI status bytes. | |
460 | // Maybe stored in the future to enable modem use | |
461 | ftdi->readbuffer_offset += 2; | |
462 | ret -= 2; | |
463 | } else if (ret <= 2) { | |
464 | // no more data to read? | |
465 | return offset; | |
466 | } | |
d9f0cce7 TJ |
467 | if (ret > 0) { |
468 | // data still fits in buf? | |
469 | if (offset+ret <= size) { | |
470 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret); | |
545820ce | 471 | //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]); |
d9f0cce7 TJ |
472 | offset += ret; |
473 | ||
53ad271d | 474 | /* Did we read exactly the right amount of bytes? */ |
d9f0cce7 TJ |
475 | if (offset == size) |
476 | return offset; | |
477 | } else { | |
478 | // only copy part of the data or size <= readbuffer_chunksize | |
479 | int part_size = size-offset; | |
480 | memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size); | |
0e302db6 | 481 | |
d9f0cce7 TJ |
482 | ftdi->readbuffer_offset += part_size; |
483 | ftdi->readbuffer_remaining = ret-part_size; | |
484 | offset += part_size; | |
485 | ||
53ad271d TJ |
486 | /* printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n", |
487 | part_size, size, offset, ret, ftdi->readbuffer_remaining); */ | |
d9f0cce7 TJ |
488 | |
489 | return offset; | |
490 | } | |
491 | } | |
cbabb7d3 | 492 | } |
948f9ada TJ |
493 | // never reached |
494 | return -2; | |
a3da1d95 GE |
495 | } |
496 | ||
497 | ||
948f9ada TJ |
498 | int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) { |
499 | // Invalidate all remaining data | |
500 | ftdi->readbuffer_offset = 0; | |
501 | ftdi->readbuffer_remaining = 0; | |
502 | ||
503 | unsigned char *new_buf; | |
504 | if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) { | |
d9f0cce7 TJ |
505 | ftdi->error_str = "out of memory for readbuffer"; |
506 | return -1; | |
948f9ada | 507 | } |
d9f0cce7 | 508 | |
948f9ada TJ |
509 | ftdi->readbuffer = new_buf; |
510 | ftdi->readbuffer_chunksize = chunksize; | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | ||
25707904 | 516 | int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) { |
948f9ada TJ |
517 | *chunksize = ftdi->readbuffer_chunksize; |
518 | return 0; | |
519 | } | |
520 | ||
521 | ||
522 | ||
a3da1d95 GE |
523 | int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask) { |
524 | unsigned short usb_val; | |
525 | ||
d9f0cce7 | 526 | usb_val = bitmask; // low byte: bitmask |
3119537f TJ |
527 | /* FT2232C: Set bitbang_mode to 2 to enable SPI */ |
528 | usb_val |= (ftdi->bitbang_mode << 8); | |
529 | ||
a97980ad | 530 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0x0B, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a3da1d95 GE |
531 | ftdi->error_str = "Unable to enter bitbang mode. Perhaps not a BM type chip?"; |
532 | return -1; | |
533 | } | |
a3da1d95 GE |
534 | ftdi->bitbang_enabled = 1; |
535 | return 0; | |
536 | } | |
537 | ||
538 | ||
539 | int ftdi_disable_bitbang(struct ftdi_context *ftdi) { | |
a97980ad | 540 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0x0B, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a3da1d95 GE |
541 | ftdi->error_str = "Unable to leave bitbang mode. Perhaps not a BM type chip?"; |
542 | return -1; | |
543 | } | |
544 | ||
545 | ftdi->bitbang_enabled = 0; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | ||
550 | int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins) { | |
551 | unsigned short usb_val; | |
a97980ad | 552 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0xC0, 0x0C, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) { |
a3da1d95 GE |
553 | ftdi->error_str = "Read pins failed"; |
554 | return -1; | |
555 | } | |
556 | ||
557 | *pins = (unsigned char)usb_val; | |
558 | return 0; | |
559 | } | |
560 | ||
561 | ||
562 | int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency) { | |
563 | unsigned short usb_val; | |
564 | ||
565 | if (latency < 1) { | |
d9f0cce7 TJ |
566 | ftdi->error_str = "Latency out of range. Only valid for 1-255"; |
567 | return -1; | |
a3da1d95 GE |
568 | } |
569 | ||
d79d2e68 | 570 | usb_val = latency; |
a97980ad | 571 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0x09, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) { |
d9f0cce7 TJ |
572 | ftdi->error_str = "Unable to set latency timer"; |
573 | return -2; | |
a3da1d95 GE |
574 | } |
575 | return 0; | |
576 | } | |
577 | ||
578 | ||
579 | int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency) { | |
580 | unsigned short usb_val; | |
a97980ad | 581 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0xC0, 0x0A, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) { |
a3da1d95 GE |
582 | ftdi->error_str = "Reading latency timer failed"; |
583 | return -1; | |
584 | } | |
585 | ||
586 | *latency = (unsigned char)usb_val; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | ||
b8aa7b35 | 591 | void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom) { |
f396dbad TJ |
592 | eeprom->vendor_id = 0x0403; |
593 | eeprom->product_id = 0x6001; | |
d9f0cce7 | 594 | |
b8aa7b35 TJ |
595 | eeprom->self_powered = 1; |
596 | eeprom->remote_wakeup = 1; | |
597 | eeprom->BM_type_chip = 1; | |
d9f0cce7 | 598 | |
b8aa7b35 TJ |
599 | eeprom->in_is_isochronous = 0; |
600 | eeprom->out_is_isochronous = 0; | |
601 | eeprom->suspend_pull_downs = 0; | |
d9f0cce7 | 602 | |
b8aa7b35 TJ |
603 | eeprom->use_serial = 0; |
604 | eeprom->change_usb_version = 0; | |
f396dbad | 605 | eeprom->usb_version = 0x0200; |
b8aa7b35 | 606 | eeprom->max_power = 0; |
d9f0cce7 | 607 | |
b8aa7b35 TJ |
608 | eeprom->manufacturer = NULL; |
609 | eeprom->product = NULL; | |
610 | eeprom->serial = NULL; | |
611 | } | |
612 | ||
613 | ||
614 | /* | |
615 | ftdi_eeprom_build return codes: | |
8ed61121 | 616 | positive value: used eeprom size |
b8aa7b35 TJ |
617 | -1: eeprom size (128 bytes) exceeded by custom strings |
618 | */ | |
619 | int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output) { | |
620 | unsigned char i, j; | |
621 | unsigned short checksum, value; | |
622 | unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0; | |
623 | int size_check; | |
624 | ||
625 | if (eeprom->manufacturer != NULL) | |
d9f0cce7 | 626 | manufacturer_size = strlen(eeprom->manufacturer); |
b8aa7b35 | 627 | if (eeprom->product != NULL) |
d9f0cce7 | 628 | product_size = strlen(eeprom->product); |
b8aa7b35 | 629 | if (eeprom->serial != NULL) |
d9f0cce7 | 630 | serial_size = strlen(eeprom->serial); |
b8aa7b35 | 631 | |
d9f0cce7 TJ |
632 | size_check = 128; // eeprom is 128 bytes |
633 | size_check -= 28; // 28 are always in use (fixed) | |
b8aa7b35 TJ |
634 | size_check -= manufacturer_size*2; |
635 | size_check -= product_size*2; | |
636 | size_check -= serial_size*2; | |
637 | ||
638 | // eeprom size exceeded? | |
639 | if (size_check < 0) | |
d9f0cce7 | 640 | return (-1); |
b8aa7b35 TJ |
641 | |
642 | // empty eeprom | |
643 | memset (output, 0, 128); | |
644 | ||
645 | // Addr 00: Stay 00 00 | |
646 | // Addr 02: Vendor ID | |
647 | output[0x02] = eeprom->vendor_id; | |
648 | output[0x03] = eeprom->vendor_id >> 8; | |
649 | ||
650 | // Addr 04: Product ID | |
651 | output[0x04] = eeprom->product_id; | |
652 | output[0x05] = eeprom->product_id >> 8; | |
653 | ||
654 | // Addr 06: Device release number (0400h for BM features) | |
655 | output[0x06] = 0x00; | |
d9f0cce7 | 656 | |
b8aa7b35 | 657 | if (eeprom->BM_type_chip == 1) |
d9f0cce7 | 658 | output[0x07] = 0x04; |
b8aa7b35 | 659 | else |
d9f0cce7 | 660 | output[0x07] = 0x02; |
b8aa7b35 TJ |
661 | |
662 | // Addr 08: Config descriptor | |
663 | // Bit 1: remote wakeup if 1 | |
664 | // Bit 0: self powered if 1 | |
665 | // | |
666 | j = 0; | |
667 | if (eeprom->self_powered == 1) | |
d9f0cce7 | 668 | j = j | 1; |
b8aa7b35 | 669 | if (eeprom->remote_wakeup == 1) |
d9f0cce7 | 670 | j = j | 2; |
b8aa7b35 TJ |
671 | output[0x08] = j; |
672 | ||
673 | // Addr 09: Max power consumption: max power = value * 2 mA | |
d9f0cce7 TJ |
674 | output[0x09] = eeprom->max_power; |
675 | ; | |
676 | ||
b8aa7b35 TJ |
677 | // Addr 0A: Chip configuration |
678 | // Bit 7: 0 - reserved | |
679 | // Bit 6: 0 - reserved | |
680 | // Bit 5: 0 - reserved | |
681 | // Bit 4: 1 - Change USB version | |
682 | // Bit 3: 1 - Use the serial number string | |
683 | // Bit 2: 1 - Enable suspend pull downs for lower power | |
684 | // Bit 1: 1 - Out EndPoint is Isochronous | |
685 | // Bit 0: 1 - In EndPoint is Isochronous | |
686 | // | |
687 | j = 0; | |
688 | if (eeprom->in_is_isochronous == 1) | |
d9f0cce7 | 689 | j = j | 1; |
b8aa7b35 | 690 | if (eeprom->out_is_isochronous == 1) |
d9f0cce7 | 691 | j = j | 2; |
b8aa7b35 | 692 | if (eeprom->suspend_pull_downs == 1) |
d9f0cce7 | 693 | j = j | 4; |
b8aa7b35 | 694 | if (eeprom->use_serial == 1) |
d9f0cce7 | 695 | j = j | 8; |
b8aa7b35 | 696 | if (eeprom->change_usb_version == 1) |
d9f0cce7 | 697 | j = j | 16; |
b8aa7b35 | 698 | output[0x0A] = j; |
d9f0cce7 | 699 | |
b8aa7b35 TJ |
700 | // Addr 0B: reserved |
701 | output[0x0B] = 0x00; | |
d9f0cce7 | 702 | |
b8aa7b35 TJ |
703 | // Addr 0C: USB version low byte when 0x0A bit 4 is set |
704 | // Addr 0D: USB version high byte when 0x0A bit 4 is set | |
705 | if (eeprom->change_usb_version == 1) { | |
706 | output[0x0C] = eeprom->usb_version; | |
d9f0cce7 | 707 | output[0x0D] = eeprom->usb_version >> 8; |
b8aa7b35 TJ |
708 | } |
709 | ||
710 | ||
711 | // Addr 0E: Offset of the manufacturer string + 0x80 | |
712 | output[0x0E] = 0x14 + 0x80; | |
713 | ||
714 | // Addr 0F: Length of manufacturer string | |
715 | output[0x0F] = manufacturer_size*2 + 2; | |
716 | ||
717 | // Addr 10: Offset of the product string + 0x80, calculated later | |
718 | // Addr 11: Length of product string | |
719 | output[0x11] = product_size*2 + 2; | |
720 | ||
721 | // Addr 12: Offset of the serial string + 0x80, calculated later | |
722 | // Addr 13: Length of serial string | |
723 | output[0x13] = serial_size*2 + 2; | |
724 | ||
725 | // Dynamic content | |
a862ddcf | 726 | output[0x14] = manufacturer_size*2 + 2; |
d9f0cce7 TJ |
727 | output[0x15] = 0x03; // type: string |
728 | ||
b8aa7b35 | 729 | i = 0x16, j = 0; |
d9f0cce7 | 730 | |
b8aa7b35 TJ |
731 | // Output manufacturer |
732 | for (j = 0; j < manufacturer_size; j++) { | |
d9f0cce7 TJ |
733 | output[i] = eeprom->manufacturer[j], i++; |
734 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
735 | } |
736 | ||
737 | // Output product name | |
d9f0cce7 | 738 | output[0x10] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
739 | output[i] = product_size*2 + 2, i++; |
740 | output[i] = 0x03, i++; | |
741 | for (j = 0; j < product_size; j++) { | |
d9f0cce7 TJ |
742 | output[i] = eeprom->product[j], i++; |
743 | output[i] = 0x00, i++; | |
b8aa7b35 | 744 | } |
d9f0cce7 | 745 | |
b8aa7b35 | 746 | // Output serial |
d9f0cce7 | 747 | output[0x12] = i + 0x80; // calculate offset |
b8aa7b35 TJ |
748 | output[i] = serial_size*2 + 2, i++; |
749 | output[i] = 0x03, i++; | |
750 | for (j = 0; j < serial_size; j++) { | |
d9f0cce7 TJ |
751 | output[i] = eeprom->serial[j], i++; |
752 | output[i] = 0x00, i++; | |
b8aa7b35 TJ |
753 | } |
754 | ||
755 | // calculate checksum | |
756 | checksum = 0xAAAA; | |
d9f0cce7 | 757 | |
b8aa7b35 | 758 | for (i = 0; i < 63; i++) { |
d9f0cce7 TJ |
759 | value = output[i*2]; |
760 | value += output[(i*2)+1] << 8; | |
b8aa7b35 | 761 | |
d9f0cce7 TJ |
762 | checksum = value^checksum; |
763 | checksum = (checksum << 1) | (checksum >> 15); | |
b8aa7b35 TJ |
764 | } |
765 | ||
766 | output[0x7E] = checksum; | |
d9f0cce7 | 767 | output[0x7F] = checksum >> 8; |
b8aa7b35 | 768 | |
8ed61121 | 769 | return size_check; |
b8aa7b35 TJ |
770 | } |
771 | ||
772 | ||
be5d7eec | 773 | int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) { |
a3da1d95 GE |
774 | int i; |
775 | ||
776 | for (i = 0; i < 64; i++) { | |
a97980ad | 777 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0xC0, 0x90, 0, i, eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2) { |
d9f0cce7 TJ |
778 | ftdi->error_str = "Reading eeprom failed"; |
779 | return -1; | |
a3da1d95 GE |
780 | } |
781 | } | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | ||
be5d7eec | 787 | int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) { |
a3da1d95 GE |
788 | unsigned short usb_val; |
789 | int i; | |
790 | ||
791 | for (i = 0; i < 64; i++) { | |
d9f0cce7 TJ |
792 | usb_val = eeprom[i*2]; |
793 | usb_val += eeprom[(i*2)+1] << 8; | |
a97980ad | 794 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0x91, usb_val, i, NULL, 0, ftdi->usb_write_timeout) != 0) { |
d9f0cce7 TJ |
795 | ftdi->error_str = "Unable to write eeprom"; |
796 | return -1; | |
797 | } | |
a3da1d95 GE |
798 | } |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | ||
804 | int ftdi_erase_eeprom(struct ftdi_context *ftdi) { | |
a97980ad | 805 | if (ftdi_usbdev_control_msg(ftdi->usb_fd, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0) { |
a3da1d95 GE |
806 | ftdi->error_str = "Unable to erase eeprom"; |
807 | return -1; | |
808 | } | |
809 | ||
810 | return 0; | |
811 | } | |
0e302db6 TJ |
812 | |
813 | ||
a97980ad TJ |
814 | /* libusb like functions - currently linux only */ |
815 | static int check_usb_vfs(const unsigned char *dirname) | |
816 | { | |
817 | DIR *dir; | |
818 | struct dirent *entry; | |
819 | int found = 0; | |
820 | ||
821 | dir = opendir(dirname); | |
822 | if (!dir) | |
823 | return 0; | |
824 | ||
825 | while ((entry = readdir(dir)) != NULL) { | |
826 | /* Skip anything starting with a . */ | |
827 | if (entry->d_name[0] == '.') | |
828 | continue; | |
829 | ||
830 | /* We assume if we find any files that it must be the right place */ | |
831 | found = 1; | |
832 | break; | |
833 | } | |
834 | ||
835 | closedir(dir); | |
836 | ||
837 | return found; | |
838 | } | |
839 | ||
840 | static int ftdi_usbdev_parsedev(int fd, unsigned int *bus, unsigned int *dev, int vendorid, int productid) | |
841 | { | |
842 | char buf[16384]; | |
843 | char *start, *end, *lineend, *cp; | |
844 | int devnum = -1, busnum = -1, vendor = -1, product = -1; | |
845 | int ret; | |
846 | ||
847 | if (lseek(fd, 0, SEEK_SET) == (off_t)-1) | |
848 | return -1; | |
849 | ret = read(fd, buf, sizeof(buf)-1); | |
850 | if (ret == -1) | |
851 | return -1; | |
852 | end = buf + ret; | |
853 | *end = 0; | |
854 | start = buf; | |
855 | ret = 0; | |
856 | while (start < end) { | |
857 | lineend = strchr(start, '\n'); | |
858 | if (!lineend) | |
859 | break; | |
860 | *lineend = 0; | |
861 | switch (start[0]) { | |
862 | case 'T': /* topology line */ | |
863 | if ((cp = strstr(start, "Dev#="))) { | |
864 | devnum = strtoul(cp + 5, NULL, 0); | |
865 | } else | |
866 | devnum = -1; | |
867 | if ((cp = strstr(start, "Bus="))) { | |
868 | busnum = strtoul(cp + 4, NULL, 0); | |
869 | } else | |
870 | busnum = -1; | |
871 | break; | |
872 | ||
873 | case 'P': | |
874 | if ((cp = strstr(start, "Vendor="))) { | |
875 | vendor = strtoul(cp + 7, NULL, 16); | |
876 | } else | |
877 | vendor = -1; | |
878 | if ((cp = strstr(start, "ProdID="))) { | |
879 | product = strtoul(cp + 7, NULL, 16); | |
880 | } else | |
881 | product = -1; | |
882 | if (vendor != -1 && product != -1 && devnum >= 1 && devnum <= 127 && | |
883 | busnum >= 0 && busnum <= 999 && | |
884 | (vendorid == vendor || vendorid == -1) && | |
885 | (productid == product || productid == -1)) { | |
886 | if (bus) | |
887 | *bus = busnum; | |
888 | if (dev) | |
889 | *dev = devnum; | |
890 | ret++; | |
891 | } | |
892 | break; | |
893 | } | |
894 | start = lineend + 1; | |
895 | } | |
896 | return ret; | |
897 | } | |
898 | ||
899 | int ftdi_usbdev_open(int vendorid, int productid) | |
900 | { | |
901 | unsigned int busnum, devnum, fd, ret; | |
902 | char usb_path[PATH_MAX+1] = ""; | |
903 | char usb_devices_path[PATH_MAX*2]; | |
904 | ||
905 | /* Find the path to the virtual filesystem */ | |
906 | if (getenv("USB_DEVFS_PATH")) { | |
907 | if (check_usb_vfs((char*)getenv("USB_DEVFS_PATH"))) { | |
908 | strncpy(usb_path, (char*)getenv("USB_DEVFS_PATH"), sizeof(usb_path) - 1); | |
909 | usb_path[sizeof(usb_path) - 1] = 0; | |
910 | } | |
911 | } | |
912 | ||
913 | if (!usb_path[0]) { | |
914 | if (check_usb_vfs("/proc/bus/usb")) { | |
915 | strncpy(usb_path, "/proc/bus/usb", sizeof(usb_path) - 1); | |
916 | usb_path[sizeof(usb_path) - 1] = 0; | |
917 | } else if (check_usb_vfs("/sys/bus/usb")) { /* 2.6 Kernel with sysfs */ | |
918 | strncpy(usb_path, "/sys/bus/usb", sizeof(usb_path) -1); | |
919 | usb_path[sizeof(usb_path) - 1] = 0; | |
920 | } else if (check_usb_vfs("/dev/usb")) { | |
921 | strncpy(usb_path, "/dev/usb", sizeof(usb_path) - 1); | |
922 | usb_path[sizeof(usb_path) - 1] = 0; | |
923 | } else | |
924 | usb_path[0] = 0; | |
925 | } | |
926 | ||
927 | /* No path, no USB support */ | |
928 | if (!usb_path[0]) | |
929 | return -1; | |
930 | ||
931 | /* Parse device list */ | |
932 | snprintf(usb_devices_path, sizeof(usb_devices_path), "%s/devices", usb_path); | |
933 | if ((fd = open(usb_devices_path, O_RDONLY)) == -1) | |
934 | return -2; | |
935 | ||
936 | ret = ftdi_usbdev_parsedev(fd, &busnum, &devnum, vendorid, productid); | |
937 | close (fd); | |
938 | ||
939 | // Device not found | |
940 | if (ret != 1) | |
941 | return -3; | |
942 | ||
943 | snprintf(usb_devices_path, sizeof(usb_devices_path), "%s/%03u/%03u", usb_path, busnum, devnum); | |
944 | if ((fd = open(usb_devices_path, O_RDWR)) == -1) | |
945 | return -4; | |
946 | ||
947 | return fd; | |
948 | } | |
949 | ||
950 | int ftdi_usbdev_claim_interface(int fd, unsigned int interface) | |
951 | { | |
952 | return ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface); | |
953 | } | |
954 | ||
955 | int ftdi_usbdev_release_interface(int fd, int interface) | |
956 | { | |
957 | return ioctl(fd, USBDEVFS_RELEASEINTERFACE, &interface); | |
958 | } | |
959 | ||
960 | ||
961 | int ftdi_usbdev_bulk_write(int fd, unsigned int endpoint, const void *data, | |
962 | unsigned int size, unsigned int timeout) | |
963 | { | |
964 | struct usbdevfs_bulktransfer arg; | |
965 | ||
966 | arg.ep = endpoint & ~USB_DIR_IN; | |
967 | arg.len = size; | |
968 | arg.timeout = timeout; | |
969 | arg.data = (void *) data; | |
970 | ||
971 | return ioctl(fd, USBDEVFS_BULK, &arg); | |
972 | } | |
973 | ||
974 | int ftdi_usbdev_control_msg(int fd, unsigned int requesttype, | |
975 | unsigned int request, unsigned int value, unsigned int index, | |
976 | void *data, unsigned int size, unsigned int timeout) | |
977 | { | |
978 | struct usbdevfs_ctrltransfer arg; | |
979 | ||
980 | arg.requesttype = requesttype; | |
981 | arg.request = request; | |
982 | arg.value = value; | |
983 | arg.index = index; | |
984 | arg.length = size; | |
985 | arg.timeout = timeout; | |
986 | arg.data = data; | |
987 | ||
988 | return ioctl(fd, USBDEVFS_CONTROL, &arg); | |
989 | } | |
990 | ||
0e302db6 | 991 | /* Functions needed for userspace URB processing */ |
a97980ad | 992 | struct usbdevfs_urb * ftdi_usbdev_alloc_urb(int iso_packets) |
0e302db6 | 993 | { |
a97980ad | 994 | return (struct usbdevfs_urb *)calloc(sizeof(struct usbdevfs_urb) |
0e302db6 TJ |
995 | + iso_packets * sizeof(struct usbdevfs_iso_packet_desc), |
996 | 1); | |
997 | } | |
998 | ||
999 | ||
a97980ad | 1000 | int ftdi_usbdev_submit_urb(int fd, struct usbdevfs_urb *urb) |
0e302db6 TJ |
1001 | { |
1002 | return ioctl(fd, USBDEVFS_SUBMITURB, urb); | |
1003 | } | |
1004 | ||
1005 | ||
a97980ad | 1006 | int ftdi_usbdev_reap_urb_ndelay(int fd, struct usbdevfs_urb **urb_return) |
0e302db6 TJ |
1007 | { |
1008 | return ioctl(fd, USBDEVFS_REAPURBNDELAY, urb_return); | |
1009 | } |