source: mainline/uspace/lib/usb/src/hidparser.c@ 8870230

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 8870230 was b53d3b7, checked in by Matej Klonfar <maklf@…>, 15 years ago

bitmap data parsing bug fix
parser initialization check bug fix
querying report data by usage path
  • Property mode set to 100644
File size: 26.5 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 * @brief HID 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#define USB_HID_NEW_REPORT_ITEM 1
43#define USB_HID_NO_ACTION 2
44#define USB_HID_UNKNOWN_TAG -99
45
46#define BAD_HACK_USAGE_PAGE 0x07
47
48int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data, size_t item_size,
49 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
50int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, size_t item_size,
51 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
52int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, size_t item_size,
53 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
54int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, size_t item_size,
55 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path);
56
57void usb_hid_descriptor_print_list(link_t *head);
58int usb_hid_report_reset_local_items();
59void usb_hid_free_report_list(link_t *head);
60int32_t usb_hid_report_tag_data_int32(const uint8_t *data, size_t size);
61inline size_t usb_hid_count_item_offset(usb_hid_report_item_t * report_item, size_t offset);
62int usb_hid_translate_data(usb_hid_report_item_t *item, const uint8_t *data, size_t j);
63int usb_pow(int a, int b);
64
65
66int usb_pow(int a, int b)
67{
68 switch(b) {
69 case 0:
70 return 1;
71 break;
72 case 1:
73 return a;
74 break;
75 default:
76 return a * usb_pow(a, b-1);
77 break;
78 }
79}
80
81/**
82 *
83 */
84int usb_hid_parser_init(usb_hid_report_parser_t *parser)
85{
86 if(parser == NULL) {
87 return EINVAL;
88 }
89
90 list_initialize(&(parser->input));
91 list_initialize(&(parser->output));
92 list_initialize(&(parser->feature));
93
94 return EOK;
95}
96
97
98/** Parse HID report descriptor.
99 *
100 * @param parser Opaque HID report parser structure.
101 * @param data Data describing the report.
102 * @return Error code.
103 */
104int usb_hid_parse_report_descriptor(usb_hid_report_parser_t *parser,
105 const uint8_t *data, size_t size)
106{
107 size_t i=0;
108 uint8_t tag=0;
109 uint8_t item_size=0;
110 int class=0;
111 int ret;
112 usb_hid_report_item_t *report_item=0;
113 usb_hid_report_item_t *new_report_item;
114 usb_hid_report_path_t *usage_path;
115 usb_hid_report_path_t *tmp_usage_path;
116
117 size_t offset_input=0;
118 size_t offset_output=0;
119 size_t offset_feature=0;
120
121
122 /* parser structure initialization*/
123 if(usb_hid_parser_init(parser) != EOK) {
124 return EINVAL;
125 }
126
127
128 /*report item initialization*/
129 if(!(report_item=malloc(sizeof(usb_hid_report_item_t)))){
130 return ENOMEM;
131 }
132 memset(report_item, 0, sizeof(usb_hid_report_item_t));
133 list_initialize(&(report_item->link));
134
135 /* usage path context initialization */
136 if(!(usage_path=usb_hid_report_path())){
137 return ENOMEM;
138 }
139
140 while(i<size){
141 if(!USB_HID_ITEM_IS_LONG(data[i])){
142
143 if((i+USB_HID_ITEM_SIZE(data[i]))>= size){
144 return EINVAL; // TODO ERROR CODE
145 }
146
147 tag = USB_HID_ITEM_TAG(data[i]);
148 item_size = USB_HID_ITEM_SIZE(data[i]);
149 class = USB_HID_ITEM_TAG_CLASS(data[i]);
150
151 usb_log_debug2(
152 "i(%u) data(%X) value(%X): TAG %u, class %u, size %u - ", i,
153 data[i], usb_hid_report_tag_data_int32(data+i+1,item_size),
154 tag, class, item_size);
155
156 ret = usb_hid_report_parse_tag(tag,class,data+i+1,
157 item_size,report_item, usage_path);
158 usb_log_debug2("ret: %u\n", ret);
159 switch(ret){
160 case USB_HID_NEW_REPORT_ITEM:
161 // store report item to report and create the new one
162 usb_log_debug("\nNEW REPORT ITEM: %X",ret);
163
164 // store current usage path
165 report_item->usage_path = usage_path;
166
167 // new current usage path
168 tmp_usage_path = usb_hid_report_path();
169
170 // copy old path to the new one
171 usb_hid_report_path_clone(tmp_usage_path, usage_path);
172
173 // swap
174 usage_path = tmp_usage_path;
175 tmp_usage_path = NULL;
176
177
178 switch(tag) {
179 case USB_HID_REPORT_TAG_INPUT:
180 report_item->offset = offset_input;
181 offset_input += report_item->count * report_item->size;
182 usb_log_debug(" - INPUT\n");
183 list_append(&(report_item->link), &(parser->input));
184 break;
185 case USB_HID_REPORT_TAG_OUTPUT:
186 report_item->offset = offset_output;
187 offset_output += report_item->count * report_item->size;
188 usb_log_debug(" - OUTPUT\n");
189 list_append(&(report_item->link), &(parser->output));
190
191 break;
192 case USB_HID_REPORT_TAG_FEATURE:
193 report_item->offset = offset_feature;
194 offset_feature += report_item->count * report_item->size;
195 usb_log_debug(" - FEATURE\n");
196 list_append(&(report_item->link), &(parser->feature));
197 break;
198 default:
199 usb_log_debug("\tjump over - tag %X\n", tag);
200 break;
201 }
202
203 /* clone current state table to the new item */
204 if(!(new_report_item = malloc(sizeof(usb_hid_report_item_t)))) {
205 return ENOMEM;
206 }
207 memcpy(new_report_item,report_item, sizeof(usb_hid_report_item_t));
208 /* reset local items */
209 new_report_item->usage_minimum = 0;
210 new_report_item->usage_maximum = 0;
211
212 link_initialize(&(new_report_item->link));
213 report_item = new_report_item;
214
215 break;
216 case USB_HID_REPORT_TAG_PUSH:
217 // push current state to stack
218 // not yet implemented
219 break;
220 case USB_HID_REPORT_TAG_POP:
221 // restore current state from stack
222 // not yet implemented
223 break;
224
225 default:
226 // nothing special to do
227 break;
228 }
229
230 /* jump over the processed block */
231 i += 1 + USB_HID_ITEM_SIZE(data[i]);
232 }
233 else{
234 // TBD
235 i += 3 + USB_HID_ITEM_SIZE(data[i+1]);
236 }
237
238
239 }
240
241 return EOK;
242}
243
244
245/**
246 * Parse input report.
247 *
248 * @param data Data for report
249 * @param size Size of report
250 * @param callbacks Callbacks for report actions
251 * @param arg Custom arguments
252 *
253 * @return Error code
254 */
255int usb_hid_boot_keyboard_input_report(const uint8_t *data, size_t size,
256 const usb_hid_report_in_callbacks_t *callbacks, void *arg)
257{
258 int i;
259 usb_hid_report_item_t item;
260
261 /* fill item due to the boot protocol report descriptor */
262 // modifier keys are in the first byte
263 uint8_t modifiers = data[0];
264
265 item.offset = 2; /* second byte is reserved */
266 item.size = 8;
267 item.count = 6;
268 item.usage_minimum = 0;
269 item.usage_maximum = 255;
270 item.logical_minimum = 0;
271 item.logical_maximum = 255;
272
273 if (size != 8) {
274 return -1; //ERANGE;
275 }
276
277 uint8_t keys[6];
278 for (i = 0; i < item.count; i++) {
279 keys[i] = data[i + item.offset];
280 }
281
282 callbacks->keyboard(keys, 6, modifiers, arg);
283 return EOK;
284}
285
286/**
287 * Makes output report for keyboard boot protocol
288 *
289 * @param leds
290 * @param output Output report data buffer
291 * @param size Size of the output buffer
292 * @return Error code
293 */
294int usb_hid_boot_keyboard_output_report(uint8_t leds, uint8_t *data, size_t size)
295{
296 if(size != 1){
297 return -1;
298 }
299
300 /* used only first five bits, others are only padding*/
301 *data = leds;
302 return EOK;
303}
304
305/**
306 *
307 * @param Tag to parse
308 * @param Report descriptor buffer
309 * @param Size of data belongs to this tag
310 * @param Current report item structe
311 * @return Code of action to be done next
312 */
313int usb_hid_report_parse_tag(uint8_t tag, uint8_t class, const uint8_t *data, size_t item_size,
314 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
315{
316 int ret;
317
318 switch(class){
319 case USB_HID_TAG_CLASS_MAIN:
320
321 if((ret=usb_hid_report_parse_main_tag(tag,data,item_size,report_item, usage_path)) == EOK) {
322 return USB_HID_NEW_REPORT_ITEM;
323 }
324 else {
325 /*TODO process the error */
326 return ret;
327 }
328 break;
329
330 case USB_HID_TAG_CLASS_GLOBAL:
331 return usb_hid_report_parse_global_tag(tag,data,item_size,report_item, usage_path);
332 break;
333
334 case USB_HID_TAG_CLASS_LOCAL:
335 return usb_hid_report_parse_local_tag(tag,data,item_size,report_item, usage_path);
336 break;
337 default:
338 return USB_HID_NO_ACTION;
339 }
340}
341
342/**
343 * Parse main tags of report descriptor
344 *
345 * @param Tag identifier
346 * @param Data buffer
347 * @param Length of data buffer
348 * @param Current state table
349 * @return Error code
350 */
351
352int usb_hid_report_parse_main_tag(uint8_t tag, const uint8_t *data, size_t item_size,
353 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
354{
355 switch(tag)
356 {
357 case USB_HID_REPORT_TAG_INPUT:
358 case USB_HID_REPORT_TAG_OUTPUT:
359 case USB_HID_REPORT_TAG_FEATURE:
360 report_item->item_flags = *data;
361 return EOK;
362 break;
363
364 case USB_HID_REPORT_TAG_COLLECTION:
365 usb_hid_report_path_append_item(usage_path, 0, 0);
366
367 return USB_HID_NO_ACTION;
368 break;
369
370 case USB_HID_REPORT_TAG_END_COLLECTION:
371 // TODO
372 // znici posledni uroven ve vsech usage paths
373 // otazka jestli nema nicit dve, respektive novou posledni vynulovat?
374 usb_hid_report_remove_last_item(usage_path);
375 return USB_HID_NO_ACTION;
376 break;
377 default:
378 return USB_HID_NO_ACTION;
379 }
380
381 return EOK;
382}
383
384/**
385 * Parse global tags of report descriptor
386 *
387 * @param Tag identifier
388 * @param Data buffer
389 * @param Length of data buffer
390 * @param Current state table
391 * @return Error code
392 */
393
394int usb_hid_report_parse_global_tag(uint8_t tag, const uint8_t *data, size_t item_size,
395 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
396{
397 // TODO take care about the bit length of data
398 switch(tag)
399 {
400 case USB_HID_REPORT_TAG_USAGE_PAGE:
401 // zmeni to jenom v poslednim poli aktualni usage path
402 usb_hid_report_set_last_item(usage_path, USB_HID_TAG_CLASS_GLOBAL,
403 usb_hid_report_tag_data_int32(data,item_size));
404 break;
405 case USB_HID_REPORT_TAG_LOGICAL_MINIMUM:
406 report_item->logical_minimum = usb_hid_report_tag_data_int32(data,item_size);
407 break;
408 case USB_HID_REPORT_TAG_LOGICAL_MAXIMUM:
409 report_item->logical_maximum = usb_hid_report_tag_data_int32(data,item_size);
410 break;
411 case USB_HID_REPORT_TAG_PHYSICAL_MINIMUM:
412 report_item->physical_minimum = usb_hid_report_tag_data_int32(data,item_size);
413 break;
414 case USB_HID_REPORT_TAG_PHYSICAL_MAXIMUM:
415 report_item->physical_maximum = usb_hid_report_tag_data_int32(data,item_size);
416 break;
417 case USB_HID_REPORT_TAG_UNIT_EXPONENT:
418 report_item->unit_exponent = usb_hid_report_tag_data_int32(data,item_size);
419 break;
420 case USB_HID_REPORT_TAG_UNIT:
421 report_item->unit = usb_hid_report_tag_data_int32(data,item_size);
422 break;
423 case USB_HID_REPORT_TAG_REPORT_SIZE:
424 report_item->size = usb_hid_report_tag_data_int32(data,item_size);
425 break;
426 case USB_HID_REPORT_TAG_REPORT_COUNT:
427 report_item->count = usb_hid_report_tag_data_int32(data,item_size);
428 break;
429 case USB_HID_REPORT_TAG_REPORT_ID:
430 report_item->id = usb_hid_report_tag_data_int32(data,item_size);
431 break;
432 case USB_HID_REPORT_TAG_PUSH:
433 case USB_HID_REPORT_TAG_POP:
434 return tag;
435 break;
436
437 default:
438 return USB_HID_NO_ACTION;
439 }
440
441 return EOK;
442}
443
444/**
445 * Parse local tags of report descriptor
446 *
447 * @param Tag identifier
448 * @param Data buffer
449 * @param Length of data buffer
450 * @param Current state table
451 * @return Error code
452 */
453int usb_hid_report_parse_local_tag(uint8_t tag, const uint8_t *data, size_t item_size,
454 usb_hid_report_item_t *report_item, usb_hid_report_path_t *usage_path)
455{
456 switch(tag)
457 {
458 case USB_HID_REPORT_TAG_USAGE:
459 usb_hid_report_set_last_item(usage_path, USB_HID_TAG_CLASS_LOCAL,
460 usb_hid_report_tag_data_int32(data,item_size));
461 break;
462 case USB_HID_REPORT_TAG_USAGE_MINIMUM:
463 report_item->usage_minimum = usb_hid_report_tag_data_int32(data,item_size);
464 break;
465 case USB_HID_REPORT_TAG_USAGE_MAXIMUM:
466 report_item->usage_maximum = usb_hid_report_tag_data_int32(data,item_size);
467 break;
468 case USB_HID_REPORT_TAG_DESIGNATOR_INDEX:
469 report_item->designator_index = usb_hid_report_tag_data_int32(data,item_size);
470 break;
471 case USB_HID_REPORT_TAG_DESIGNATOR_MINIMUM:
472 report_item->designator_minimum = usb_hid_report_tag_data_int32(data,item_size);
473 break;
474 case USB_HID_REPORT_TAG_DESIGNATOR_MAXIMUM:
475 report_item->designator_maximum = usb_hid_report_tag_data_int32(data,item_size);
476 break;
477 case USB_HID_REPORT_TAG_STRING_INDEX:
478 report_item->string_index = usb_hid_report_tag_data_int32(data,item_size);
479 break;
480 case USB_HID_REPORT_TAG_STRING_MINIMUM:
481 report_item->string_minimum = usb_hid_report_tag_data_int32(data,item_size);
482 break;
483 case USB_HID_REPORT_TAG_STRING_MAXIMUM:
484 report_item->string_maximum = usb_hid_report_tag_data_int32(data,item_size);
485 break;
486 case USB_HID_REPORT_TAG_DELIMITER:
487 report_item->delimiter = usb_hid_report_tag_data_int32(data,item_size);
488 break;
489
490 default:
491 return USB_HID_NO_ACTION;
492 }
493
494 return EOK;
495}
496
497/**
498 * Converts raw data to int32 (thats the maximum length of short item data)
499 *
500 * @param Data buffer
501 * @param Size of buffer
502 * @return Converted int32 number
503 */
504int32_t usb_hid_report_tag_data_int32(const uint8_t *data, size_t size)
505{
506 unsigned int i;
507 int32_t result;
508
509 result = 0;
510 for(i=0; i<size; i++) {
511 result = (result | (data[i]) << (i*8));
512 }
513
514 return result;
515}
516
517
518
519/**
520 * Prints content of given list of report items.
521 *
522 * @param List of report items
523 * @return void
524 */
525void usb_hid_descriptor_print_list(link_t *head)
526{
527 usb_hid_report_item_t *report_item;
528 usb_hid_report_usage_path_t *path_item;
529 link_t *path;
530 link_t *item;
531
532 if(head == NULL || list_empty(head)) {
533 usb_log_debug("\tempty\n");
534 return;
535 }
536
537 for(item = head->next; item != head; item = item->next) {
538
539 report_item = list_get_instance(item, usb_hid_report_item_t, link);
540
541 usb_log_debug("\tOFFSET: %X\n", report_item->offset);
542 usb_log_debug("\tCOUNT: %X\n", report_item->count);
543 usb_log_debug("\tSIZE: %X\n", report_item->size);
544 usb_log_debug("\tCONSTANT/VAR: %X\n", USB_HID_ITEM_FLAG_CONSTANT(report_item->item_flags));
545 usb_log_debug("\tVARIABLE/ARRAY: %X\n", USB_HID_ITEM_FLAG_VARIABLE(report_item->item_flags));
546 usb_log_debug("\tUSAGE PATH:\n");
547
548 path = report_item->usage_path->link.next;
549 while(path != &report_item->usage_path->link) {
550 path_item = list_get_instance(path, usb_hid_report_usage_path_t, link);
551 usb_log_debug("\t\tUSAGE PAGE: %X, USAGE: %X\n", path_item->usage_page, path_item->usage);
552 path = path->next;
553 }
554
555
556// usb_log_debug("\tUSAGE: %X\n", report_item->usage);
557// usb_log_debug("\tUSAGE PAGE: %X\n", report_item->usage_page);
558 usb_log_debug("\tLOGMIN: %X\n", report_item->logical_minimum);
559 usb_log_debug("\tLOGMAX: %X\n", report_item->logical_maximum);
560 usb_log_debug("\tPHYMIN: %X\n", report_item->physical_minimum);
561 usb_log_debug("\tPHYMAX: %X\n", report_item->physical_maximum);
562 usb_log_debug("\tUSAGEMIN: %X\n", report_item->usage_minimum);
563 usb_log_debug("\tUSAGEMAX: %X\n", report_item->usage_maximum);
564
565 usb_log_debug("\n");
566
567 }
568
569
570}
571/**
572 * Prints content of given descriptor in human readable format.
573 *
574 * @param Parsed descriptor to print
575 * @return void
576 */
577void usb_hid_descriptor_print(usb_hid_report_parser_t *parser)
578{
579 if(parser == NULL) {
580 return;
581 }
582
583 usb_log_debug("INPUT:\n");
584 usb_hid_descriptor_print_list(&parser->input);
585
586 usb_log_debug("OUTPUT: \n");
587 usb_hid_descriptor_print_list(&parser->output);
588
589 usb_log_debug("FEATURE:\n");
590 usb_hid_descriptor_print_list(&parser->feature);
591
592}
593
594/**
595 * Releases whole linked list of report items
596 *
597 *
598 */
599void usb_hid_free_report_list(link_t *head)
600{
601 return;
602
603 usb_hid_report_item_t *report_item;
604 link_t *next;
605
606 if(head == NULL || list_empty(head)) {
607 return;
608 }
609
610 next = head->next;
611 while(next != head) {
612
613 report_item = list_get_instance(next, usb_hid_report_item_t, link);
614
615 while(!list_empty(&report_item->usage_path->link)) {
616 usb_hid_report_remove_last_item(report_item->usage_path);
617 }
618
619
620 next = next->next;
621
622 free(report_item);
623 }
624
625 return;
626
627}
628
629/** Free the HID report parser structure
630 *
631 * @param parser Opaque HID report parser structure
632 * @return Error code
633 */
634void usb_hid_free_report_parser(usb_hid_report_parser_t *parser)
635{
636 if(parser == NULL){
637 return;
638 }
639
640 usb_hid_free_report_list(&parser->input);
641 usb_hid_free_report_list(&parser->output);
642 usb_hid_free_report_list(&parser->feature);
643
644 return;
645}
646
647/** Parse and act upon a HID report.
648 *
649 * @see usb_hid_parse_report_descriptor
650 *
651 * @param parser Opaque HID report parser structure.
652 * @param data Data for the report.
653 * @param callbacks Callbacks for report actions.
654 * @param arg Custom argument (passed through to the callbacks).
655 * @return Error code.
656 */
657int usb_hid_parse_report(const usb_hid_report_parser_t *parser,
658 const uint8_t *data, size_t size,
659 usb_hid_report_path_t *path, int flags,
660 const usb_hid_report_in_callbacks_t *callbacks, void *arg)
661{
662 /*
663 *
664 * only key codes (usage page 0x07) will be processed
665 * other usages will be ignored
666 */
667 link_t *list_item;
668 usb_hid_report_item_t *item;
669 uint8_t *keys;
670 uint8_t item_value;
671 size_t key_count=0;
672 size_t i=0;
673 size_t j=0;
674
675 if(parser == NULL) {
676 return EINVAL;
677 }
678
679
680 // get the size of result keycodes array
681 key_count = usb_hid_report_input_length(parser, path, flags);
682
683 if(!(keys = malloc(sizeof(uint8_t) * key_count))){
684 return ENOMEM;
685 }
686
687 // read data
688 list_item = parser->input.next;
689 while(list_item != &(parser->input)) {
690
691 item = list_get_instance(list_item, usb_hid_report_item_t, link);
692 if(!USB_HID_ITEM_FLAG_CONSTANT(item->item_flags) &&
693 (usb_hid_report_compare_usage_path(item->usage_path, path, flags) == EOK)) {
694 for(j=0; j<(size_t)(item->count); j++) {
695 if((USB_HID_ITEM_FLAG_VARIABLE(item->item_flags) == 0) ||
696 ((item->usage_minimum == 0) && (item->usage_maximum == 0))) {
697 // variable item
698 keys[i++] = usb_hid_translate_data(item, data,j);
699 }
700 else {
701 // bitmapa
702 if((item_value = usb_hid_translate_data(item, data, j)) != 0) {
703 keys[i++] = (item->count - 1 - j) + item->usage_minimum;
704 }
705 else {
706 keys[i++] = 0;
707 }
708 }
709 }
710 }
711 list_item = list_item->next;
712 }
713
714 callbacks->keyboard(keys, key_count, 0, arg);
715
716 free(keys);
717 return EOK;
718
719}
720
721
722int usb_hid_translate_data(usb_hid_report_item_t *item, const uint8_t *data, size_t j)
723{
724 int resolution;
725 int offset;
726 int part_size;
727
728 int32_t value;
729 int32_t mask;
730 const uint8_t *foo;
731
732 // now only common numbers llowed
733 if(item->size > 32) {
734 return 0;
735 }
736
737 if((item->physical_minimum == 0) && (item->physical_maximum == 0)) {
738 item->physical_minimum = item->logical_minimum;
739 item->physical_maximum = item->logical_maximum;
740 }
741
742 if(item->physical_maximum == item->physical_minimum){
743 resolution = 1;
744 }
745 else {
746 resolution = (item->logical_maximum - item->logical_minimum) /
747 ((item->physical_maximum - item->physical_minimum) *
748 (usb_pow(10,(item->unit_exponent))));
749 }
750 offset = item->offset + (j * item->size);
751
752 // FIXME
753 if((offset/8) != ((offset+item->size)/8)) {
754 usb_log_debug2("offset %d\n", offset);
755
756 part_size = ((offset+item->size)%8);
757 usb_log_debug2("part size %d\n",part_size);
758
759 // the higher one
760 foo = data+(offset/8);
761 mask = ((1 << (item->size-part_size))-1);
762 value = (*foo & mask) << part_size;
763
764 usb_log_debug2("hfoo %x\n", *foo);
765 usb_log_debug2("hmaska %x\n", mask);
766 usb_log_debug2("hval %d\n", value);
767
768 // the lower one
769 foo = data+((offset+item->size)/8);
770 mask = ((1 << part_size)-1) << (8-part_size);
771 value += ((*foo & mask) >> (8-part_size));
772
773 usb_log_debug2("lfoo %x\n", *foo);
774 usb_log_debug2("lmaska %x\n", mask);
775 usb_log_debug2("lval %d\n", ((*foo & mask) >> (8-(item->size-part_size))));
776 usb_log_debug2("val %d\n", value);
777
778
779 }
780 else {
781 foo = data+(offset/8);
782 mask = ((1 << item->size)-1) << (8-((offset%8)+item->size));
783 value = (*foo & mask) >> (8-((offset%8)+item->size));
784
785 usb_log_debug2("offset %d\n", offset);
786
787 usb_log_debug2("foo %x\n", *foo);
788 usb_log_debug2("maska %x\n", mask);
789 usb_log_debug2("val %d\n", value);
790 }
791
792 usb_log_debug2("---\n\n");
793
794 return (int)(((value - item->logical_minimum) / resolution) + item->physical_minimum);
795
796}
797
798int usb_hid_report_input_length(const usb_hid_report_parser_t *parser,
799 usb_hid_report_path_t *path, int flags)
800{
801 int ret = 0;
802 link_t *item;
803 usb_hid_report_item_t *report_item;
804
805 if(parser == NULL) {
806 return EINVAL;
807 }
808
809 item = (&parser->input)->next;
810 while(&parser->input != item) {
811 report_item = list_get_instance(item, usb_hid_report_item_t, link);
812 if(!USB_HID_ITEM_FLAG_CONSTANT(report_item->item_flags) &&
813 (usb_hid_report_compare_usage_path(report_item->usage_path, path, flags) == EOK)) {
814 ret += report_item->count;
815 }
816
817 item = item->next;
818 }
819
820 return ret;
821}
822
823
824/**
825 *
826 */
827int usb_hid_report_path_append_item(usb_hid_report_path_t *usage_path,
828 int32_t usage_page, int32_t usage)
829{
830 usb_hid_report_usage_path_t *item;
831
832 if(!(item=malloc(sizeof(usb_hid_report_usage_path_t)))) {
833 return ENOMEM;
834 }
835 list_initialize(&item->link);
836
837 item->usage = usage;
838 item->usage_page = usage_page;
839
840 list_append (&usage_path->link, &item->link);
841 usage_path->depth++;
842 return EOK;
843}
844
845/**
846 *
847 */
848void usb_hid_report_remove_last_item(usb_hid_report_path_t *usage_path)
849{
850 usb_hid_report_usage_path_t *item;
851
852 if(!list_empty(&usage_path->link)){
853 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
854 list_remove(usage_path->link.prev);
855 usage_path->depth--;
856 free(item);
857 }
858}
859
860/**
861 *
862 */
863void usb_hid_report_null_last_item(usb_hid_report_path_t *usage_path)
864{
865 usb_hid_report_usage_path_t *item;
866
867 if(!list_empty(&usage_path->link)){
868 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
869 memset(item, 0, sizeof(usb_hid_report_usage_path_t));
870 }
871}
872
873/**
874 *
875 */
876void usb_hid_report_set_last_item(usb_hid_report_path_t *usage_path, int32_t tag, int32_t data)
877{
878 usb_hid_report_usage_path_t *item;
879
880 if(!list_empty(&usage_path->link)){
881 item = list_get_instance(usage_path->link.prev, usb_hid_report_usage_path_t, link);
882
883 switch(tag) {
884 case USB_HID_TAG_CLASS_GLOBAL:
885 item->usage_page = data;
886 break;
887 case USB_HID_TAG_CLASS_LOCAL:
888 item->usage = data;
889 break;
890 }
891 }
892
893}
894
895/**
896 *
897 */
898int usb_hid_report_compare_usage_path(usb_hid_report_path_t *report_path,
899 usb_hid_report_path_t *path,
900 int flags)
901{
902 usb_hid_report_usage_path_t *report_item;
903 usb_hid_report_usage_path_t *path_item;
904
905 link_t *report_link;
906 link_t *path_link;
907
908 int only_page;
909
910 if(path->depth == 0){
911 return EOK;
912 }
913
914
915 if((only_page = flags & USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY) != 0){
916 flags -= USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY;
917 }
918
919 switch(flags){
920 /* path must be completly identical */
921 case USB_HID_PATH_COMPARE_STRICT:
922 if(report_path->depth != path->depth){
923 return 1;
924 }
925
926 report_link = report_path->link.next;
927 path_link = path->link.next;
928
929 while((report_link != &report_path->link) && (path_link != &path->link)) {
930 report_item = list_get_instance(report_link, usb_hid_report_usage_path_t, link);
931 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
932
933 if((report_item->usage_page != path_item->usage_page) ||
934 ((only_page == 0) && (report_item->usage != path_item->usage))) {
935 return 1;
936 } else {
937 report_link = report_link->next;
938 path_link = path_link->next;
939 }
940
941 }
942
943 if((report_link == &report_path->link) && (path_link == &path->link)) {
944 return EOK;
945 }
946 else {
947 return 1;
948 }
949 break;
950
951 /* given path must be the end of the report one*/
952 case USB_HID_PATH_COMPARE_END:
953 report_link = report_path->link.prev;
954 path_link = path->link.prev;
955
956 if(list_empty(&path->link)){
957 return EOK;
958 }
959
960 while((report_link != &report_path->link) && (path_link != &path->link)) {
961 report_item = list_get_instance(report_link, usb_hid_report_usage_path_t, link);
962 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
963
964 if((report_item->usage_page != path_item->usage_page) ||
965 ((only_page == 0) && (report_item->usage != path_item->usage))) {
966 return 1;
967 } else {
968 report_link = report_link->prev;
969 path_link = path_link->prev;
970 }
971
972 }
973
974 if(path_link == &path->link) {
975 return EOK;
976 }
977 else {
978 return 1;
979 }
980
981 break;
982
983 default:
984 return EINVAL;
985 }
986
987
988
989
990}
991
992/**
993 *
994 */
995usb_hid_report_path_t *usb_hid_report_path(void)
996{
997 usb_hid_report_path_t *path;
998 path = malloc(sizeof(usb_hid_report_path_t));
999 if(!path){
1000 return NULL;
1001 }
1002 else {
1003 path->depth = 0;
1004 list_initialize(&path->link);
1005 return path;
1006 }
1007}
1008
1009/**
1010 *
1011 */
1012void usb_hid_report_path_free(usb_hid_report_path_t *path)
1013{
1014 while(!list_empty(&path->link)){
1015 usb_hid_report_remove_last_item(path);
1016 }
1017}
1018
1019
1020/**
1021 *
1022 */
1023int usb_hid_report_path_clone(usb_hid_report_path_t *new_usage_path, usb_hid_report_path_t *usage_path)
1024{
1025 usb_hid_report_usage_path_t *path_item;
1026 link_t *path_link;
1027
1028
1029 if(list_empty(&usage_path->link)){
1030 return EOK;
1031 }
1032
1033 path_link = usage_path->link.next;
1034 while(path_link != &usage_path->link) {
1035 path_item = list_get_instance(path_link, usb_hid_report_usage_path_t, link);
1036 usb_hid_report_path_append_item (new_usage_path, path_item->usage_page, path_item->usage);
1037
1038 path_link = path_link->next;
1039 }
1040
1041 return EOK;
1042}
1043
1044
1045/**
1046 * @}
1047 */
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