source: mainline/uspace/lib/usb/src/hidparser.c@ 26d46d2

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 26d46d2 was 1cbb4b7, checked in by Lubos Slovak <lubos.slovak@…>, 14 years ago

Fixed freeing of subdrivers + some debug output.
  • Property mode set to 100644
File size: 35.0 KB
Line 
1/*
2 * Copyright (c) 2010 Vojtech Horky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libusb
30 * @{
31 */
32/** @file
33 * HID report descriptor and report data parser implementation.
34 */
35#include <usb/classes/hidparser.h>
36#include <errno.h>
37#include <stdio.h>
38#include <malloc.h>
39#include <mem.h>
40#include <usb/debug.h>
41
42/** */
43#define USB_HID_NEW_REPORT_ITEM 1
44
45/** */
46#define USB_HID_NO_ACTION 2
47
48/** */
49#define USB_HID_UNKNOWN_TAG -99
50
51/*
52 * Private descriptor parser functions
53 */
54int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data, size_t item_size,
55 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
56int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, size_t item_size,
57 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
58int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, size_t item_size,
59 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
60int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, size_t item_size,
61 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
62
63void usb_hid_descriptor_print_list(link_t *head);
64int usb_hid_report_reset_local_items();
65void usb_hid_free_report_list(link_t *head);
66usb_hid_report_item_t *usb_hid_report_item_clone(const usb_hid_report_item_t *item);
67/*
68 * Data translation private functions
69 */
70int32_t usb_hid_report_tag_data_int32(const uint8_t *data, size_t size);
71inline size_t usb_hid_count_item_offset(usb_hid_report_item_t * report_item, size_t offset);
72int usb_hid_translate_data(usb_hid_report_item_t *item, const uint8_t *data, size_t j);
73int32_t usb_hid_translate_data_reverse(usb_hid_report_item_t *item, int32_t value);
74int usb_pow(int a, int b);
75
76// TODO: tohle ma bejt asi jinde
77int usb_pow(int a, int b)
78{
79 switch(b) {
80 case 0:
81 return 1;
82 break;
83 case 1:
84 return a;
85 break;
86 default:
87 return a * usb_pow(a, b-1);
88 break;
89 }
90}
91
92/**
93 * Initialize the report descriptor parser structure
94 *
95 * @param parser Report descriptor parser structure
96 * @return Error code
97 */
98int usb_hid_parser_init(usb_hid_report_parser_t *parser)
99{
100 if(parser == NULL) {
101 return EINVAL;
102 }
103
104 list_initialize(&(parser->input));
105 list_initialize(&(parser->output));
106 list_initialize(&(parser->feature));
107
108 list_initialize(&(parser->stack));
109
110 parser->use_report_id = 0;
111 return EOK;
112}
113
114
115/** Parse HID report descriptor.
116 *
117 * @param parser Opaque HID report parser structure.
118 * @param data Data describing the report.
119 * @return Error code.
120 */
121int usb_hid_parse_report_descriptor(usb_hid_report_parser_t *parser,
122 const uint8_t *data, size_t size)
123{
124 size_t i=0;
125 uint8_t tag=0;
126 uint8_t item_size=0;
127 int class=0;
128 int ret;
129 usb_hid_report_item_t *report_item=0;
130 usb_hid_report_item_t *new_report_item;
131 usb_hid_report_path_t *usage_path;
132 usb_hid_report_path_t *tmp_usage_path;
133
134 size_t offset_input=0;
135 size_t offset_output=0;
136 size_t offset_feature=0;
137
138
139 /* parser structure initialization*/
140 if(usb_hid_parser_init(parser) != EOK) {
141 return EINVAL;
142 }
143
144
145 /*report item initialization*/
146 if(!(report_item=malloc(sizeof(usb_hid_report_item_t)))){
147 return ENOMEM;
148 }
149 memset(report_item, 0, sizeof(usb_hid_report_item_t));
150 list_initialize(&(report_item->link));
151
152 /* usage path context initialization */
153 if(!(usage_path=usb_hid_report_path())){
154 return ENOMEM;
155 }
156
157 while(i<size){
158 if(!USB_HID_ITEM_IS_LONG(data[i])){
159
160 if((i+USB_HID_ITEM_SIZE(data[i]))>= size){
161 return EINVAL; // TODO ERROR CODE
162 }
163
164 tag = USB_HID_ITEM_TAG(data[i]);
165 item_size = USB_HID_ITEM_SIZE(data[i]);
166 class = USB_HID_ITEM_TAG_CLASS(data[i]);
167
168 usb_log_debug2(
169 "i(%u) data(%X) value(%X): TAG %u, class %u, size %u - ", i,
170 data[i], usb_hid_report_tag_data_int32(data+i+1,item_size),
171 tag, class, item_size);
172
173 ret = usb_hid_report_parse_tag(tag,class,data+i+1,
174 item_size,report_item, usage_path);
175 usb_log_debug2("ret: %u\n", ret);
176 switch(ret){
177 case USB_HID_NEW_REPORT_ITEM:
178 // store report item to report and create the new one
179 usb_log_debug("\nNEW REPORT ITEM: %X",ret);
180
181 // store current usage path
182 report_item->usage_path = usage_path;
183
184 // clone path to the new one
185 tmp_usage_path = usb_hid_report_path_clone(usage_path);
186
187 // swap
188 usage_path = tmp_usage_path;
189 tmp_usage_path = NULL;
190
191 usb_hid_report_path_set_report_id(report_item->usage_path, report_item->id);
192 if(report_item->id != 0){
193 parser->use_report_id = 1;
194 }
195
196 switch(tag) {
197 case USB_HID_REPORT_TAG_INPUT:
198 report_item->offset = offset_input;
199 offset_input += report_item->count * report_item->size;
200 usb_log_debug(" - INPUT\n");
201 list_append(&(report_item->link), &(parser->input));
202 break;
203 case USB_HID_REPORT_TAG_OUTPUT:
204 report_item->offset = offset_output;
205 offset_output += report_item->count * report_item->size;
206 usb_log_debug(" - OUTPUT\n");
207 list_append(&(report_item->link), &(parser->output));
208
209 break;
210 case USB_HID_REPORT_TAG_FEATURE:
211 report_item->offset = offset_feature;
212 offset_feature += report_item->count * report_item->size;
213 usb_log_debug(" - FEATURE\n");
214 list_append(&(report_item->link), &(parser->feature));
215 break;
216 default:
217 usb_log_debug("\tjump over - tag %X\n", tag);
218 break;
219 }
220
221 /* clone current state table to the new item */
222 if(!(new_report_item = malloc(sizeof(usb_hid_report_item_t)))) {
223 return ENOMEM;
224 }
225 memcpy(new_report_item,report_item, sizeof(usb_hid_report_item_t));
226 link_initialize(&(new_report_item->link));
227
228 /* reset local items */
229 new_report_item->usage_minimum = 0;
230 new_report_item->usage_maximum = 0;
231 new_report_item->designator_index = 0;
232 new_report_item->designator_minimum = 0;
233 new_report_item->designator_maximum = 0;
234 new_report_item->string_index = 0;
235 new_report_item->string_minimum = 0;
236 new_report_item->string_maximum = 0;
237
238 /* reset usage from current usage path */
239 usb_hid_report_usage_path_t *path = list_get_instance(&usage_path->link, usb_hid_report_usage_path_t, link);
240 path->usage = 0;
241
242 report_item = new_report_item;
243
244 break;
245 case USB_HID_REPORT_TAG_PUSH:
246 // push current state to stack
247 new_report_item = usb_hid_report_item_clone(report_item);
248 list_prepend (&parser->stack, &new_report_item->link);
249
250 break;
251 case USB_HID_REPORT_TAG_POP:
252 // restore current state from stack
253 if(list_empty (&parser->stack)) {
254 return EINVAL;
255 }
256
257 report_item = list_get_instance(&parser->stack, usb_hid_report_item_t, link);
258 list_remove (parser->stack.next);
259
260 break;
261
262 default:
263 // nothing special to do
264 break;
265 }
266
267 /* jump over the processed block */
268 i += 1 + USB_HID_ITEM_SIZE(data[i]);
269 }
270 else{
271 // TBD
272 i += 3 + USB_HID_ITEM_SIZE(data[i+1]);
273 }
274
275
276 }
277
278 return EOK;
279}
280
281
282/**
283 * Parse input report.
284 *
285 * @param data Data for report
286 * @param size Size of report
287 * @param callbacks Callbacks for report actions
288 * @param arg Custom arguments
289 *
290 * @return Error code
291 */
292int usb_hid_boot_keyboard_input_report(const uint8_t *data, size_t size,
293 const usb_hid_report_in_callbacks_t *callbacks, void *arg)
294{
295 int i;
296 usb_hid_report_item_t item;
297
298 /* fill item due to the boot protocol report descriptor */
299 // modifier keys are in the first byte
300 uint8_t modifiers = data[0];
301
302 item.offset = 2; /* second byte is reserved */
303 item.size = 8;
304 item.count = 6;
305 item.usage_minimum = 0;
306 item.usage_maximum = 255;
307 item.logical_minimum = 0;
308 item.logical_maximum = 255;
309
310 if (size != 8) {
311 return -1; //ERANGE;
312 }
313
314 uint8_t keys[6];
315 for (i = 0; i < item.count; i++) {
316 keys[i] = data[i + item.offset];
317 }
318
319 callbacks->keyboard(keys, 6, modifiers, arg);
320 return EOK;
321}
322
323/**
324 * Makes output report for keyboard boot protocol
325 *
326 * @param leds
327 * @param output Output report data buffer
328 * @param size Size of the output buffer
329 * @return Error code
330 */
331int usb_hid_boot_keyboard_output_report(uint8_t leds, uint8_t *data, size_t size)
332{
333 if(size != 1){
334 return -1;
335 }
336
337 /* used only first five bits, others are only padding*/
338 *data = leds;
339 return EOK;
340}
341
342/**
343 * Parse one tag of the report descriptor
344 *
345 * @param Tag to parse
346 * @param Report descriptor buffer
347 * @param Size of data belongs to this tag
348 * @param Current report item structe
349 * @return Code of action to be done next
350 */
351int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data, size_t item_size,
352 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
353{
354 int ret;
355
356 switch(class){
357 case USB_HID_TAG_CLASS_MAIN:
358
359 if((ret=usb_hid_report_parse_main_tag(tag,data,item_size,report_item, usage_path)) == EOK) {
360 return USB_HID_NEW_REPORT_ITEM;
361 }
362 else {
363 /*TODO process the error */
364 return ret;
365 }
366 break;
367
368 case USB_HID_TAG_CLASS_GLOBAL:
369 return usb_hid_report_parse_global_tag(tag,data,item_size,report_item, usage_path);
370 break;
371
372 case USB_HID_TAG_CLASS_LOCAL:
373 return usb_hid_report_parse_local_tag(tag,data,item_size,report_item, usage_path);
374 break;
375 default:
376 return USB_HID_NO_ACTION;
377 }
378}
379
380/**
381 * Parse main tags of report descriptor
382 *
383 * @param Tag identifier
384 * @param Data buffer
385 * @param Length of data buffer
386 * @param Current state table
387 * @return Error code
388 */
389
390int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, size_t item_size,
391 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
392{
393 switch(tag)
394 {
395 case USB_HID_REPORT_TAG_INPUT:
396 case USB_HID_REPORT_TAG_OUTPUT:
397 case USB_HID_REPORT_TAG_FEATURE:
398 report_item->item_flags = *data;
399 return EOK;
400 break;
401
402 case USB_HID_REPORT_TAG_COLLECTION:
403 usb_hid_report_path_append_item(usage_path, 0, 0);
404
405 return USB_HID_NO_ACTION;
406 break;
407
408 case USB_HID_REPORT_TAG_END_COLLECTION:
409 // TODO
410 // znici posledni uroven ve vsech usage paths
411 // otazka jestli nema nicit dve, respektive novou posledni vynulovat?
412 usb_hid_report_remove_last_item(usage_path);
413 return USB_HID_NO_ACTION;
414 break;
415 default:
416 return USB_HID_NO_ACTION;
417 }
418
419 return EOK;
420}
421
422/**
423 * Parse global tags of report descriptor
424 *
425 * @param Tag identifier
426 * @param Data buffer
427 * @param Length of data buffer
428 * @param Current state table
429 * @return Error code
430 */
431int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, size_t item_size,
432 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
433{
434 // TODO take care about the bit length of data
435 switch(tag)
436 {
437 case USB_HID_REPORT_TAG_USAGE_PAGE:
438 // zmeni to jenom v poslednim poli aktualni usage path
439 usb_hid_report_set_last_item(usage_path, USB_HID_TAG_CLASS_GLOBAL,
440 usb_hid_report_tag_data_int32(data,item_size));
441 break;
442 case USB_HID_REPORT_TAG_LOGICAL_MINIMUM:
443 report_item->logical_minimum = usb_hid_report_tag_data_int32(data,item_size);
444 break;
445 case USB_HID_REPORT_TAG_LOGICAL_MAXIMUM:
446 report_item->logical_maximum = usb_hid_report_tag_data_int32(data,item_size);
447 break;
448 case USB_HID_REPORT_TAG_PHYSICAL_MINIMUM:
449 report_item->physical_minimum = usb_hid_report_tag_data_int32(data,item_size);
450 break;
451 case USB_HID_REPORT_TAG_PHYSICAL_MAXIMUM:
452 report_item->physical_maximum = usb_hid_report_tag_data_int32(data,item_size);
453 break;
454 case USB_HID_REPORT_TAG_UNIT_EXPONENT:
455 report_item->unit_exponent = usb_hid_report_tag_data_int32(data,item_size);
456 break;
457 case USB_HID_REPORT_TAG_UNIT:
458 report_item->unit = usb_hid_report_tag_data_int32(data,item_size);
459 break;
460 case USB_HID_REPORT_TAG_REPORT_SIZE:
461 report_item->size = usb_hid_report_tag_data_int32(data,item_size);
462 break;
463 case USB_HID_REPORT_TAG_REPORT_COUNT:
464 report_item->count = usb_hid_report_tag_data_int32(data,item_size);
465 break;
466 case USB_HID_REPORT_TAG_REPORT_ID:
467 report_item->id = usb_hid_report_tag_data_int32(data,item_size);
468 break;
469 case USB_HID_REPORT_TAG_PUSH:
470 case USB_HID_REPORT_TAG_POP:
471 return tag;
472 break;
473
474 default:
475 return USB_HID_NO_ACTION;
476 }
477
478 return EOK;
479}
480
481/**
482 * Parse local tags of report descriptor
483 *
484 * @param Tag identifier
485 * @param Data buffer
486 * @param Length of data buffer
487 * @param Current state table
488 * @return Error code
489 */
490int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, size_t item_size,
491 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
492{
493 switch(tag)
494 {
495 case USB_HID_REPORT_TAG_USAGE:
496 usb_hid_report_set_last_item(usage_path, USB_HID_TAG_CLASS_LOCAL,
497 usb_hid_report_tag_data_int32(data,item_size));
498 break;
499 case USB_HID_REPORT_TAG_USAGE_MINIMUM:
500 report_item->usage_minimum = usb_hid_report_tag_data_int32(data,item_size);
501 break;
502 case USB_HID_REPORT_TAG_USAGE_MAXIMUM:
503 report_item->usage_maximum = usb_hid_report_tag_data_int32(data,item_size);
504 break;
505 case USB_HID_REPORT_TAG_DESIGNATOR_INDEX:
506 report_item->designator_index = usb_hid_report_tag_data_int32(data,item_size);
507 break;
508 case USB_HID_REPORT_TAG_DESIGNATOR_MINIMUM:
509 report_item->designator_minimum = usb_hid_report_tag_data_int32(data,item_size);
510 break;
511 case USB_HID_REPORT_TAG_DESIGNATOR_MAXIMUM:
512 report_item->designator_maximum = usb_hid_report_tag_data_int32(data,item_size);
513 break;
514 case USB_HID_REPORT_TAG_STRING_INDEX:
515 report_item->string_index = usb_hid_report_tag_data_int32(data,item_size);
516 break;
517 case USB_HID_REPORT_TAG_STRING_MINIMUM:
518 report_item->string_minimum = usb_hid_report_tag_data_int32(data,item_size);
519 break;
520 case USB_HID_REPORT_TAG_STRING_MAXIMUM:
521 report_item->string_maximum = usb_hid_report_tag_data_int32(data,item_size);
522 break;
523 case USB_HID_REPORT_TAG_DELIMITER:
524 report_item->delimiter = usb_hid_report_tag_data_int32(data,item_size);
525 break;
526
527 default:
528 return USB_HID_NO_ACTION;
529 }
530
531 return EOK;
532}
533
534/**
535 * Converts raw data to int32 (thats the maximum length of short item data)
536 *
537 * @param Data buffer
538 * @param Size of buffer
539 * @return Converted int32 number
540 */
541int32_t usb_hid_report_tag_data_int32(const uint8_t *data, size_t size)
542{
543 unsigned int i;
544 int32_t result;
545
546 result = 0;
547 for(i=0; i<size; i++) {
548 result = (result | (data[i]) << (i*8));
549 }
550
551 return result;
552}
553
554
555
556/**
557 * Prints content of given list of report items.
558 *
559 * @param List of report items (usb_hid_report_item_t)
560 * @return void
561 */
562void usb_hid_descriptor_print_list(link_t *head)
563{
564 usb_hid_report_item_t *report_item;
565 usb_hid_report_usage_path_t *path_item;
566 link_t *path;
567 link_t *item;
568
569 if(head == NULL || list_empty(head)) {
570 usb_log_debug("\tempty\n");
571 return;
572 }
573
574 for(item = head->next; item != head; item = item->next) {
575
576 report_item = list_get_instance(item, usb_hid_report_item_t, link);
577
578 usb_log_debug("\tOFFSET: %X\n", report_item->offset);
579 usb_log_debug("\tCOUNT: %X\n", report_item->count);
580 usb_log_debug("\tSIZE: %X\n", report_item->size);
581 usb_log_debug("\tCONSTANT/VAR: %X\n", USB_HID_ITEM_FLAG_CONSTANT(report_item->item_flags));
582 usb_log_debug("\tVARIABLE/ARRAY: %X\n", USB_HID_ITEM_FLAG_VARIABLE(report_item->item_flags));
583 usb_log_debug("\tUSAGE PATH:\n");
584
585 path = report_item->usage_path->link.next;
586 while(path != &report_item->usage_path->link) {
587 path_item = list_get_instance(path, usb_hid_report_usage_path_t, link);
588 usb_log_debug("\t\tUSAGE PAGE: %X, USAGE: %X\n", path_item->usage_page, path_item->usage);
589 path = path->next;
590 }
591
592 usb_log_debug("\tLOGMIN: %X\n", report_item->logical_minimum);
593 usb_log_debug("\tLOGMAX: %X\n", report_item->logical_maximum);
594 usb_log_debug("\tPHYMIN: %X\n", report_item->physical_minimum);
595 usb_log_debug("\tPHYMAX: %X\n", report_item->physical_maximum);
596 usb_log_debug("\tUSAGEMIN: %X\n", report_item->usage_minimum);
597 usb_log_debug("\tUSAGEMAX: %X\n", report_item->usage_maximum);
598
599 usb_log_debug("\n");
600
601 }
602
603
604}
605/**
606 * Prints content of given report descriptor in human readable format.
607 *
608 * @param parser Parsed descriptor to print
609 * @return void
610 */
611void usb_hid_descriptor_print(usb_hid_report_parser_t *parser)
612{
613 if(parser == NULL) {
614 return;
615 }
616
617 usb_log_debug("INPUT:\n");
618 usb_hid_descriptor_print_list(&parser->input);
619
620 usb_log_debug("OUTPUT: \n");
621 usb_hid_descriptor_print_list(&parser->output);
622
623 usb_log_debug("FEATURE:\n");
624 usb_hid_descriptor_print_list(&parser->feature);
625
626}
627
628/**
629 * Releases whole linked list of report items
630 *
631 * @param head Head of list of report descriptor items (usb_hid_report_item_t)
632 * @return void
633 */
634void usb_hid_free_report_list(link_t *head)
635{
636 return;
637
638 usb_hid_report_item_t *report_item;
639 link_t *next;
640
641 if(head == NULL || list_empty(head)) {
642 return;
643 }
644
645 next = head->next;
646 while(next != head) {
647
648 report_item = list_get_instance(next, usb_hid_report_item_t, link);
649
650 while(!list_empty(&report_item->usage_path->link)) {
651 usb_hid_report_remove_last_item(report_item->usage_path);
652 }
653
654
655 next = next->next;
656
657 free(report_item);
658 }
659
660 return;
661
662}
663
664/** Frees the HID report descriptor parser structure
665 *
666 * @param parser Opaque HID report parser structure
667 * @return void
668 */
669void usb_hid_free_report_parser(usb_hid_report_parser_t *parser)
670{
671 if(parser == NULL){
672 return;
673 }
674
675 parser->use_report_id = 0;
676
677 usb_hid_free_report_list(&parser->input);
678 usb_hid_free_report_list(&parser->output);
679 usb_hid_free_report_list(&parser->feature);
680
681 return;
682}
683
684/** Parse and act upon a HID report.
685 *
686 * @see usb_hid_parse_report_descriptor
687 *
688 * @param parser Opaque HID report parser structure.
689 * @param data Data for the report.
690 * @param callbacks Callbacks for report actions.
691 * @param arg Custom argument (passed through to the callbacks).
692 * @return Error code.
693 */
694int usb_hid_parse_report(const usb_hid_report_parser_t *parser,
695 const uint8_t *data, size_t size,
696 usb_hid_report_path_t *path, int flags,
697 const usb_hid_report_in_callbacks_t *callbacks, void *arg)
698{
699 link_t *list_item;
700 usb_hid_report_item_t *item;
701 uint8_t *keys;
702 uint8_t item_value;
703 size_t key_count=0;
704 size_t i=0;
705 size_t j=0;
706 uint8_t report_id = 0;
707
708 if(parser == NULL) {
709 return EINVAL;
710 }
711
712 /* get the size of result array */
713 key_count = usb_hid_report_input_length(parser, path, flags);
714
715 if(!(keys = malloc(sizeof(uint8_t) * key_count))){
716 return ENOMEM;
717 }
718
719 if(parser->use_report_id != 0) {
720 report_id = data[0];
721 usb_hid_report_path_set_report_id(path, report_id);
722 }
723
724 /* read data */
725 list_item = parser->input.next;
726 while(list_item != &(parser->input)) {
727
728 item = list_get_instance(list_item, usb_hid_report_item_t, link);
729
730 if(!USB_HID_ITEM_FLAG_CONSTANT(item->item_flags) &&
731 (usb_hid_report_compare_usage_path(item->usage_path, path, flags) == EOK)) {
732 for(j=0; j<(size_t)(item->count); j++) {
733 if((USB_HID_ITEM_FLAG_VARIABLE(item->item_flags) == 0) ||
734 ((item->usage_minimum == 0) && (item->usage_maximum == 0))) {
735 // variable item
736 keys[i++] = usb_hid_translate_data(item, data,j);
737 }
738 else {
739 // bitmapa
740 if((item_value = usb_hid_translate_data(item, data, j)) != 0) {
741 keys[i++] = (item->count - 1 - j) + item->usage_minimum;
742 }
743 else {
744 keys[i++] = 0;
745 }
746 }
747 }
748 }
749 list_item = list_item->next;
750 }
751
752 callbacks->keyboard(keys, key_count, report_id, arg);
753
754 free(keys);
755 return EOK;
756
757}
758
759/**
760 * Translate data from the report as specified in report descriptor
761 *
762 * @param item Report descriptor item with definition of translation
763 * @param data Data to translate
764 * @param j Index of processed field in report descriptor item
765 * @return Translated data
766 */
767int usb_hid_translate_data(usb_hid_report_item_t *item, const uint8_t *data, size_t j)
768{
769 int resolution;
770 int offset;
771 int part_size;
772
773 int32_t value;
774 int32_t mask;
775 const uint8_t *foo;
776
777 // now only common numbers llowed
778 if(item->size > 32) {
779 return 0;
780 }
781
782 if((item->physical_minimum == 0) && (item->physical_maximum == 0)) {
783 item->physical_minimum = item->logical_minimum;
784 item->physical_maximum = item->logical_maximum;
785 }
786
787 if(item->physical_maximum == item->physical_minimum){
788 resolution = 1;
789 }
790 else {
791 resolution = (item->logical_maximum - item->logical_minimum) /
792 ((item->physical_maximum - item->physical_minimum) *
793 (usb_pow(10,(item->unit_exponent))));
794 }
795
796 offset = item->offset + (j * item->size);
797 if(item->id != 0) {
798 offset += 8;
799 usb_log_debug("MOVED OFFSET BY 1Byte, REPORT_ID(%d)\n", item->id);
800 }
801
802 // FIXME
803 if((offset/8) != ((offset+item->size)/8)) {
804 usb_log_debug2("offset %d\n", offset);
805
806 part_size = ((offset+item->size)%8);
807 usb_log_debug2("part size %d\n",part_size);
808
809 // the higher one
810 foo = data+(offset/8);
811 mask = ((1 << (item->size-part_size))-1);
812 value = (*foo & mask) << part_size;
813
814 usb_log_debug2("hfoo %x\n", *foo);
815 usb_log_debug2("hmaska %x\n", mask);
816 usb_log_debug2("hval %d\n", value);
817
818 // the lower one
819 foo = data+((offset+item->size)/8);
820 mask = ((1 << part_size)-1) << (8-part_size);
821 value += ((*foo & mask) >> (8-part_size));
822
823 usb_log_debug2("lfoo %x\n", *foo);
824 usb_log_debug2("lmaska %x\n", mask);
825 usb_log_debug2("lval %d\n", ((*foo & mask) >> (8-(item->size-part_size))));
826 usb_log_debug2("val %d\n", value);
827
828
829 }
830 else {
831 foo = data+(offset/8);
832 mask = ((1 << item->size)-1) << (8-((offset%8)+item->size));
833 value = (*foo & mask) >> (8-((offset%8)+item->size));
834
835 usb_log_debug2("offset %d\n", offset);
836
837 usb_log_debug2("foo %x\n", *foo);
838 usb_log_debug2("maska %x\n", mask);
839 usb_log_debug2("val %d\n", value);
840 }
841
842 usb_log_debug2("---\n\n");
843
844 return (int)(((value - item->logical_minimum) / resolution) + item->physical_minimum);
845
846}
847
848/**
849 *
850 *
851 * @param parser
852 * @param path
853 * @param flags
854 * @return
855 */
856size_t usb_hid_report_input_length(const usb_hid_report_parser_t *parser,
857 usb_hid_report_path_t *path, int flags)
858{
859 size_t ret = 0;
860 link_t *item;
861 usb_hid_report_item_t *report_item;
862
863 if(parser == NULL) {
864 return 0;
865 }
866
867 item = parser->input.next;
868 while(&parser->input != item) {
869 report_item = list_get_instance(item, usb_hid_report_item_t, link);
870 if(!USB_HID_ITEM_FLAG_CONSTANT(report_item->item_flags) &&
871 (usb_hid_report_compare_usage_path(report_item->usage_path, path, flags) == EOK)) {
872 ret += report_item->count;
873 }
874
875 item = item->next;
876 }
877
878 return ret;
879}
880
881
882/**
883 *
884 * @param usage_path
885 * @param usage_page
886 * @param usage
887 * @return
888 */
889int usb_hid_report_path_append_item(usb_hid_report_path_t *usage_path,
890 int32_t usage_page, int32_t usage)
891{
892 usb_hid_report_usage_path_t *item;
893
894 if(!(item=malloc(sizeof(usb_hid_report_usage_path_t)))) {
895 return ENOMEM;
896 }
897 list_initialize(&item->link);
898
899 item->usage = usage;
900 item->usage_page = usage_page;
901
902 usb_log_debug("Appending usage %d, usage page %d\n", usage, usage_page);
903
904 list_append (&usage_path->link, &item->link);
905 usage_path->depth++;
906 return EOK;
907}
908
909/**
910 *
911 * @param usage_path
912 * @return
913 */
914void usb_hid_report_remove_last_item(usb_hid_report_path_t *usage_path)
915{
916 usb_hid_report_usage_path_t *item;
917
918 if(!list_empty(&usage_path->link)){
919 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
920 list_remove(usage_path->link.prev);
921 usage_path->depth--;
922 free(item);
923 }
924}
925
926/**
927 *
928 * @param usage_path
929 * @return
930 */
931void usb_hid_report_null_last_item(usb_hid_report_path_t *usage_path)
932{
933 usb_hid_report_usage_path_t *item;
934
935 if(!list_empty(&usage_path->link)){
936 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
937 memset(item, 0, sizeof(usb_hid_report_usage_path_t));
938 }
939}
940
941/**
942 *
943 * @param usage_path
944 * @param tag
945 * @param data
946 * @return
947 */
948void usb_hid_report_set_last_item(usb_hid_report_path_t *usage_path, int32_t tag, int32_t data)
949{
950 usb_hid_report_usage_path_t *item;
951
952 if(!list_empty(&usage_path->link)){
953 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
954
955 switch(tag) {
956 case USB_HID_TAG_CLASS_GLOBAL:
957 item->usage_page = data;
958 break;
959 case USB_HID_TAG_CLASS_LOCAL:
960 item->usage = data;
961 break;
962 }
963 }
964
965}
966
967/**
968 *
969 *
970 * @param report_path
971 * @param path
972 * @param flags
973 * @return
974 */
975int usb_hid_report_compare_usage_path(usb_hid_report_path_t *report_path,
976 usb_hid_report_path_t *path,
977 int flags)
978{
979 usb_hid_report_usage_path_t *report_item;
980 usb_hid_report_usage_path_t *path_item;
981
982 link_t *report_link;
983 link_t *path_link;
984
985 int only_page;
986
987 if(report_path->report_id != path->report_id) {
988 return 1;
989 }
990
991 if(path->depth == 0){
992 return EOK;
993 }
994
995
996 if((only_page = flags & USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY) != 0){
997 flags -= USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY;
998 }
999
1000 switch(flags){
1001 /* path must be completly identical */
1002 case USB_HID_PATH_COMPARE_STRICT:
1003 if(report_path->depth != path->depth){
1004 return 1;
1005 }
1006
1007 report_link = report_path->link.next;
1008 path_link = path->link.next;
1009
1010 while((report_link != &report_path->link) && (path_link != &path->link)) {
1011 report_item = list_get_instance(report_link, usb_hid_report_usage_path_t, link);
1012 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
1013
1014 if((report_item->usage_page != path_item->usage_page) ||
1015 ((only_page == 0) && (report_item->usage != path_item->usage))) {
1016 return 1;
1017 } else {
1018 report_link = report_link->next;
1019 path_link = path_link->next;
1020 }
1021
1022 }
1023
1024 if((report_link == &report_path->link) && (path_link == &path->link)) {
1025 return EOK;
1026 }
1027 else {
1028 return 1;
1029 }
1030 break;
1031
1032 /* compare with only the end of path*/
1033 case USB_HID_PATH_COMPARE_END:
1034 report_link = report_path->link.prev;
1035 path_link = path->link.prev;
1036
1037 if(list_empty(&path->link)){
1038 return EOK;
1039 }
1040
1041 while((report_link != &report_path->link) && (path_link != &path->link)) {
1042 report_item = list_get_instance(report_link, usb_hid_report_usage_path_t, link);
1043 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
1044
1045 if((report_item->usage_page != path_item->usage_page) ||
1046 ((only_page == 0) && (report_item->usage != path_item->usage))) {
1047 return 1;
1048 } else {
1049 report_link = report_link->prev;
1050 path_link = path_link->prev;
1051 }
1052
1053 }
1054
1055 if(path_link == &path->link) {
1056 return EOK;
1057 }
1058 else {
1059 return 1;
1060 }
1061
1062 break;
1063
1064 default:
1065 return EINVAL;
1066 }
1067
1068
1069
1070
1071}
1072
1073/**
1074 *
1075 * @return
1076 */
1077usb_hid_report_path_t *usb_hid_report_path(void)
1078{
1079 usb_hid_report_path_t *path;
1080 path = malloc(sizeof(usb_hid_report_path_t));
1081 if(!path){
1082 return NULL;
1083 }
1084 else {
1085 path->depth = 0;
1086 path->report_id = 0;
1087 list_initialize(&path->link);
1088 return path;
1089 }
1090}
1091
1092/**
1093 *
1094 * @param path
1095 * @return void
1096 */
1097void usb_hid_report_path_free(usb_hid_report_path_t *path)
1098{
1099 while(!list_empty(&path->link)){
1100 usb_hid_report_remove_last_item(path);
1101 }
1102}
1103
1104
1105/**
1106 * Clone content of given usage path to the new one
1107 *
1108 * @param usage_path
1109 * @return
1110 */
1111usb_hid_report_path_t *usb_hid_report_path_clone(usb_hid_report_path_t *usage_path)
1112{
1113 usb_hid_report_usage_path_t *path_item;
1114 link_t *path_link;
1115 usb_hid_report_path_t *new_usage_path = usb_hid_report_path ();
1116
1117 if(new_usage_path == NULL){
1118 return NULL;
1119 }
1120
1121 if(list_empty(&usage_path->link)){
1122 return new_usage_path;
1123 }
1124
1125 path_link = usage_path->link.next;
1126 while(path_link != &usage_path->link) {
1127 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
1128 usb_hid_report_path_append_item (new_usage_path, path_item->usage_page, path_item->usage);
1129
1130 path_link = path_link->next;
1131 }
1132
1133 return new_usage_path;
1134}
1135
1136
1137/*** OUTPUT API **/
1138
1139/** Allocates output report buffer
1140 *
1141 * @param parser
1142 * @param size
1143 * @return
1144 */
1145uint8_t *usb_hid_report_output(usb_hid_report_parser_t *parser, size_t *size)
1146{
1147 if(parser == NULL) {
1148 *size = 0;
1149 return NULL;
1150 }
1151
1152 // read the last output report item
1153 usb_hid_report_item_t *last;
1154 link_t *link;
1155
1156 link = parser->output.prev;
1157 if(link != &parser->output) {
1158 last = list_get_instance(link, usb_hid_report_item_t, link);
1159 *size = (last->offset + (last->size * last->count)) / 8;
1160
1161 uint8_t *buffer = malloc(sizeof(uint8_t) * (*size));
1162 memset(buffer, 0, sizeof(uint8_t) * (*size));
1163 usb_log_debug("output buffer: %s\n", usb_debug_str_buffer(buffer, *size, 0));
1164
1165 return buffer;
1166 }
1167 else {
1168 *size = 0;
1169 return NULL;
1170 }
1171}
1172
1173
1174/** Frees output report buffer
1175 *
1176 * @param output Output report buffer
1177 * @return
1178 */
1179void usb_hid_report_output_free(uint8_t *output)
1180
1181{
1182 if(output != NULL) {
1183 free (output);
1184 }
1185}
1186
1187/** Returns size of output for given usage path
1188 *
1189 * @param parser
1190 * @param path
1191 * @param flags
1192 * @return
1193 */
1194size_t usb_hid_report_output_size(usb_hid_report_parser_t *parser,
1195 usb_hid_report_path_t *path, int flags)
1196{
1197 size_t ret = 0;
1198 link_t *item;
1199 usb_hid_report_item_t *report_item;
1200
1201 if(parser == NULL) {
1202 return 0;
1203 }
1204
1205 item = parser->output.next;
1206 while(&parser->output != item) {
1207 report_item = list_get_instance(item, usb_hid_report_item_t, link);
1208 if(!USB_HID_ITEM_FLAG_CONSTANT(report_item->item_flags) &&
1209 (usb_hid_report_compare_usage_path(report_item->usage_path, path, flags) == EOK)) {
1210 ret += report_item->count;
1211 }
1212
1213 item = item->next;
1214 }
1215
1216 return ret;
1217
1218}
1219
1220/** Updates the output report buffer by translated given data
1221 *
1222 * @param parser
1223 * @param path
1224 * @param flags
1225 * @param buffer
1226 * @param size
1227 * @param data
1228 * @param data_size
1229 * @return
1230 */
1231int usb_hid_report_output_translate(usb_hid_report_parser_t *parser,
1232 usb_hid_report_path_t *path, int flags,
1233 uint8_t *buffer, size_t size,
1234 int32_t *data, size_t data_size)
1235{
1236 usb_hid_report_item_t *report_item;
1237 link_t *item;
1238 size_t idx=0;
1239 int i=0;
1240 int32_t value=0;
1241 int offset;
1242 int length;
1243 int32_t tmp_value;
1244 size_t offset_prefix = 0;
1245
1246 if(parser == NULL) {
1247 return EINVAL;
1248 }
1249
1250 if(parser->use_report_id != 0) {
1251 buffer[0] = path->report_id;
1252 offset_prefix = 8;
1253 }
1254
1255 usb_log_debug("OUTPUT BUFFER: %s\n", usb_debug_str_buffer(buffer,size, 0));
1256 usb_log_debug("OUTPUT DATA[0]: %d, DATA[1]: %d, DATA[2]: %d\n", data[0], data[1], data[2]);
1257
1258 item = parser->output.next;
1259 while(item != &parser->output) {
1260 report_item = list_get_instance(item, usb_hid_report_item_t, link);
1261
1262 for(i=0; i<report_item->count; i++) {
1263
1264 if(idx >= data_size) {
1265 break;
1266 }
1267
1268 if((USB_HID_ITEM_FLAG_VARIABLE(report_item->item_flags) == 0) ||
1269 ((report_item->usage_minimum == 0) && (report_item->usage_maximum == 0))) {
1270
1271// // variable item
1272 value = usb_hid_translate_data_reverse(report_item, data[idx++]);
1273 offset = report_item->offset + (i * report_item->size) + offset_prefix;
1274 length = report_item->size;
1275 }
1276 else {
1277 //bitmap
1278 value += usb_hid_translate_data_reverse(report_item, data[idx++]);
1279 offset = report_item->offset + offset_prefix;
1280 length = report_item->size * report_item->count;
1281 }
1282
1283 if((offset/8) == ((offset+length-1)/8)) {
1284 // je to v jednom bytu
1285 if(((size_t)(offset/8) >= size) || ((size_t)(offset+length-1)/8) >= size) {
1286 break; // TODO ErrorCode
1287 }
1288
1289 size_t shift = offset%8;
1290
1291 value = value << shift;
1292 value = value & (((1 << length)-1) << shift);
1293
1294 uint8_t mask = 0;
1295 mask = 0xff - (((1 << length) - 1) << shift);
1296 buffer[offset/8] = (buffer[offset/8] & mask) | value;
1297 }
1298 else {
1299 // je to ve dvou!! FIXME: melo by to umet delsi jak 2
1300
1301 // konec prvniho -- dolni x bitu
1302 tmp_value = value;
1303 tmp_value = tmp_value & ((1 << (8-(offset%8)))-1);
1304 tmp_value = tmp_value << (offset%8);
1305
1306 uint8_t mask = 0;
1307 mask = ~(((1 << (8-(offset%8)))-1) << (offset%8));
1308 buffer[offset/8] = (buffer[offset/8] & mask) | tmp_value;
1309
1310 // a ted druhej -- hornich length-x bitu
1311 value = value >> (8 - (offset % 8));
1312 value = value & ((1 << (length - (8 - (offset % 8)))) - 1);
1313
1314 mask = ((1 << (length - (8 - (offset % 8)))) - 1);
1315 buffer[(offset+length-1)/8] = (buffer[(offset+length-1)/8] & mask) | value;
1316 }
1317
1318 }
1319
1320 item = item->next;
1321 }
1322
1323 usb_log_debug("OUTPUT BUFFER: %s\n", usb_debug_str_buffer(buffer,size, 0));
1324
1325 return EOK;
1326}
1327
1328/**
1329 *
1330 * @param item
1331 * @param value
1332 * @return
1333 */
1334int32_t usb_hid_translate_data_reverse(usb_hid_report_item_t *item, int value)
1335{
1336 int ret=0;
1337 int resolution;
1338
1339 if(USB_HID_ITEM_FLAG_CONSTANT(item->item_flags)) {
1340 ret = item->logical_minimum;
1341 }
1342
1343 if((USB_HID_ITEM_FLAG_VARIABLE(item->item_flags) == 0)) {
1344
1345 // variable item
1346 if((item->physical_minimum == 0) && (item->physical_maximum == 0)) {
1347 item->physical_minimum = item->logical_minimum;
1348 item->physical_maximum = item->logical_maximum;
1349 }
1350
1351 if(item->physical_maximum == item->physical_minimum){
1352 resolution = 1;
1353 }
1354 else {
1355 resolution = (item->logical_maximum - item->logical_minimum) /
1356 ((item->physical_maximum - item->physical_minimum) *
1357 (usb_pow(10,(item->unit_exponent))));
1358 }
1359
1360 ret = ((value - item->physical_minimum) * resolution) + item->logical_minimum;
1361 }
1362 else {
1363 // bitmapa
1364 if(value == 0) {
1365 ret = 0;
1366 }
1367 else {
1368 size_t bitmap_idx = (value - item->usage_minimum);
1369 ret = 1 << bitmap_idx;
1370 }
1371 }
1372
1373
1374 return ret;
1375}
1376
1377
1378int usb_hid_report_path_set_report_id(usb_hid_report_path_t *path, uint8_t report_id)
1379{
1380 if(path == NULL){
1381 return EINVAL;
1382 }
1383
1384 path->report_id = report_id;
1385 return EOK;
1386}
1387
1388
1389usb_hid_report_item_t *usb_hid_report_item_clone(const usb_hid_report_item_t *item)
1390{
1391 usb_hid_report_item_t *new_report_item;
1392
1393 if(!(new_report_item = malloc(sizeof(usb_hid_report_item_t)))) {
1394 return NULL;
1395 }
1396 memcpy(new_report_item,item, sizeof(usb_hid_report_item_t));
1397 link_initialize(&(new_report_item->link));
1398
1399 return new_report_item;
1400}
1401
1402/**
1403 * @}
1404 */
Note: See TracBrowser for help on using the repository browser.