1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
|
/****************************************************************************
* (C) Copyright 2008 Samsung Electronics Co., Ltd., All rights reserved
*
* [File Name] : ControlTransferChecker.c
* [Description] : The Source file implements the external
* and internal functions of ControlTransferChecker.
* [Author] : Yang Soon Yeal { syatom.yang@samsung.com }
* [Department] : System LSI Division/System SW Lab
* [Created Date]: 2009/02/10
* [Revision History]
* (1) 2008/06/13 by Yang Soon Yeal { syatom.yang@samsung.com }
* - Created this file and implements functions of ControlTransferChecker
* (2) 2008/06/18 by Yang Soon Yeal { syatom.yang@samsung.com }
* - Completed to implement ControlTransferChecker.c v1.0
*
****************************************************************************/
/****************************************************************************
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
****************************************************************************/
/******************************************************************************/
/*!
* @name u8 process_xfercompl_on_control(struct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the xfercompl event
* the procedure of this function is as following
* 1. clears all bits of the channel' HCINT
* by using clear_ch_intr() of S3CIsr.
* 2. masks some bit of HCINTMSK
* 3. updates the result_td fields
* err_cnt/u8/standard_dev_req_info.
* 4. updates the result_td->parent_ed_p->ed_status.
* control_data_tgl.
* 5. calculates the tranferred size
* by calling calc_transferred_size() on DATA_STAGE.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return USB_ERR_SUCCESS
*/
/******************************************************************************/
static u8 process_xfercompl_on_control(struct td *result_td, struct hc_info *hcinfo)
{
u8 ret_val = 0;
result_td->err_cnt = 0;
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ALL);
/* Mask ack Interrupt.. */
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
result_td->parent_ed_p->ed_status.is_ping_enable = false;
switch (result_td->standard_dev_req_info.conrol_transfer_stage) {
case SETUP_STAGE:
if (result_td->standard_dev_req_info.is_data_stage)
result_td->standard_dev_req_info.
conrol_transfer_stage = DATA_STAGE;
else
result_td->standard_dev_req_info.
conrol_transfer_stage = STATUS_STAGE;
ret_val = RE_TRANSMIT;
break;
case DATA_STAGE:
result_td->transferred_szie +=
calc_transferred_size(true, result_td, hcinfo);
/* at IN Transfer, short transfer is accepted. */
if (result_td->transferred_szie == result_td->buf_size) {
result_td->standard_dev_req_info.
conrol_transfer_stage = STATUS_STAGE;
result_td->error_code = USB_ERR_STATUS_COMPLETE;
} else {
if (result_td->parent_ed_p->ed_desc.is_ep_in &&
hcinfo->hc_size.b.xfersize) {
if (result_td->transfer_flag &
USB_TRANS_FLAG_NOT_SHORT) {
result_td->error_code =
USB_ERR_STATUS_SHORTREAD;
result_td->standard_dev_req_info.
conrol_transfer_stage =
STATUS_STAGE;
} else {
result_td->error_code =
USB_ERR_STATUS_COMPLETE;
result_td->standard_dev_req_info.
conrol_transfer_stage =
STATUS_STAGE;
}
} else {
/* the Data Stage is not completed.
So we need to continue Data Stage. */
result_td->standard_dev_req_info.
conrol_transfer_stage = DATA_STAGE;
update_data_toggle(result_td,
hcinfo->hc_size.b.pid);
}
}
if (hcinfo->hc_int.b.nyet) {
/* at OUT Transfer, we must re-transmit. */
if (result_td->parent_ed_p->ed_desc.is_ep_in == false) {
if (result_td->parent_ed_p->ed_desc.
dev_speed == HIGH_SPEED_OTG)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
else
result_td->parent_ed_p->ed_status.
is_ping_enable = false;
}
}
ret_val = RE_TRANSMIT;
break;
case STATUS_STAGE:
result_td->standard_dev_req_info.
conrol_transfer_stage = COMPLETE_STAGE;
if (hcinfo->hc_int.b.nyet) {
/* at OUT Transfer, we must re-transmit. */
if (result_td->parent_ed_p->ed_desc.is_ep_in == false) {
if (result_td->parent_ed_p->ed_desc.
dev_speed == HIGH_SPEED_OTG)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
else
result_td->parent_ed_p->ed_status.
is_ping_enable = false;
}
}
ret_val = DE_ALLOCATE;
break;
default:
break;
}
return ret_val;
}
/******************************************************************************/
/*!
* @name u8 process_ahb_on_control(ruct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with theAHB Errorl event
* this function stop the channel to be executed
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return DE_ALLOCATE
*/
/******************************************************************************/
/* TODO: not used. remove */
#if 0
static u8 process_ahb_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
result_td->error_code = USB_ERR_STATUS_AHBERR;
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_AHBErr);
/* Mask ack Interrupt.. */
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
/* we just calculate the size of the transferred data
on Data Stage of Control Transfer. */
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE)
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
return DE_ALLOCATE;
}
#endif
/******************************************************************************/
/*!
* @name u8 process_stall_on_control(struct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with theStall event
* but USB2.0 Spec don't permit the Stall
* on Setup Stage of Control Transfer.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return DE_ALLOCATE
*/
/******************************************************************************/
static u8 process_stall_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
result_td->error_code = USB_ERR_STATUS_STALL;
clear_ch_intr(result_td->cur_stransfer.alloc_chnum, CH_STATUS_ALL);
/* Mask ack Interrupt.. */
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
result_td->parent_ed_p->ed_status.is_ping_enable = false;
/* we just calculate the size of the transferred data
on Data Stage of Control Transfer. */
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE)
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
return DE_ALLOCATE;
}
/******************************************************************************/
/*!
* @name u8 process_nak_on_control(ruct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the nak event
* nak is occured at OUT/IN Transaction of Data/Status Stage,
* and is not occured at Setup Stage.
* If nak is occured at IN Transaction,
* this function processes this interrupt as following.
* 1. resets the result_td->err_cnt.
* 2. masks ack/nak/DaaTglErr bit of HCINTMSK.
* 3. clears the nak bit of HCINT
* 4. be careful, nak of IN Transaction don't require re-transmit.
*
* If nak is occured at OUT Transaction,
* this function processes this interrupt as following.
* 1. all procedures of IN Transaction are executed.
* 2. calculates the size of the transferred data.
* 3. if the speed of USB Device is High-Speed, sets the ping protocol.
* 4. update the Toggle
* at OUT Transaction, this function check whether the speed of
* USB Device is High-Speed or not.
* if USB Device is High-Speed, then
* this function sets the ping protocol.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return RE_SCHEDULE
*/
/******************************************************************************/
static u8 process_nak_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
/* at OUT Transfer, we must re-transmit. */
if (result_td->parent_ed_p->ed_desc.is_ep_in == false) {
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
update_data_toggle(result_td, hcinfo->hc_size.b.pid);
}
if (result_td->parent_ed_p->ed_desc.dev_speed == HIGH_SPEED_OTG) {
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == false)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
}
else if (result_td->standard_dev_req_info.
conrol_transfer_stage == STATUS_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == true)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
} else
result_td->parent_ed_p->ed_status.
is_ping_enable = false;
}
return RE_SCHEDULE;
}
/******************************************************************************/
/*!
* @name u8 process_ack_on_control(ruct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the ack event
* ack of IN/OUT Transaction don't need any retransmit.
* this function just resets result_td->err_cnt
* and masks ack/nak/DataTgl of HCINTMSK.
* finally, this function clears ack bit of HCINT.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return NO_ACTION
*/
/******************************************************************************/
static u8 process_ack_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
result_td->parent_ed_p->ed_status.is_ping_enable = false;
return NO_ACTION;
}
/******************************************************************************/
/*!
* @name u8 process_nyet_on_control(struct td *result_td,
* struct hc_info *hcinfo)
*
* @brief this function deals with the nyet event
* nyet is occured at OUT Transaction of Data/Status Stage,
* and is not occured at Setup Stage.
* If nyet is occured at OUT Transaction,
* this function processes this interrupt as following.
* 1. resets the result_td->err_cnt.
* 2. masks ack/nak/datatglerr bit of HCINTMSK.
* 3. clears the nyet bit of HCINT
* 4. calculates the size of the transferred data.
* 5. if the speed of USB Device is High-Speed, sets the ping protocol.
* 6. update the Data Toggle.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return RE_SCHEDULE
*/
/******************************************************************************/
static u8 process_nyet_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
clear_ch_intr(result_td->cur_stransfer.alloc_chnum, CH_STATUS_NYET);
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
if (result_td->parent_ed_p->ed_desc.dev_speed == HIGH_SPEED_OTG) {
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == false)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
}
else if (result_td->standard_dev_req_info.
conrol_transfer_stage == STATUS_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == true)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
} else
result_td->parent_ed_p->ed_status.
is_ping_enable = false;
}
update_data_toggle(result_td, hcinfo->hc_size.b.pid);
return RE_SCHEDULE;
}
/******************************************************************************/
/*!
* @name u8 process_xacterr_on_control(ruct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the xacterr event
* xacterr is occured at OUT/IN Transaction of Data/Status Stage,
* and is not occured at Setup Stage.
* if Timeout/CRC error/false EOP is occured, then xacterr is occured.
* the procedure to process xacterr is as following.
* 1. increses the result_td->err_cnt
* 2. check whether the result_td->err_cnt is equal to 3.
* 3. unmasks ack/nak/datatglerr bit of HCINTMSK.
* 4. clears the xacterr bit of HCINT
* 5. calculates the size of the transferred data.
* 6. if the speed of USB Device is High-Speed, sets the ping protocol.
* 7. update the Data Toggle.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return RE_TRANSMIT -if the Error Counter is less than RETRANSMIT_THRESHOLD
* DE_ALLOCATE -if the Error Counter is equal to RETRANSMIT_THRESHOLD
*/
/******************************************************************************/
static u8 process_xacterr_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
u8 ret_val = 0;
if (result_td->err_cnt < RETRANSMIT_THRESHOLD) {
result_td->cur_stransfer.hc_reg.hc_int_msk.d32 |=
(CH_STATUS_ACK + CH_STATUS_NAK + CH_STATUS_DataTglErr);
ret_val = RE_TRANSMIT;
unmask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
unmask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
unmask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
result_td->err_cnt++ ;
} else {
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
ret_val = DE_ALLOCATE;
result_td->err_cnt = 0 ;
result_td->error_code = USB_ERR_STATUS_XACTERR;
}
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE)
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
if (result_td->parent_ed_p->ed_desc.dev_speed == HIGH_SPEED_OTG) {
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == false)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
}
else if (result_td->standard_dev_req_info.
conrol_transfer_stage == STATUS_STAGE) {
if (result_td->parent_ed_p->ed_desc.is_ep_in == true)
result_td->parent_ed_p->ed_status.
is_ping_enable = true;
} else
result_td->parent_ed_p->ed_status.is_ping_enable =
false;
}
update_data_toggle(result_td, hcinfo->hc_size.b.pid);
return ret_val;
}
/******************************************************************************/
/*!
* @name void process_bblerr_on_control(truct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the Babble event
* babble error can be just occured at IN Transaction.
* So if the direction of transfer is
* OUT, this function return Error Code.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return DE_ALLOCATE
* NO_ACTION -if the direction is OUT
*/
/******************************************************************************/
static u8 process_bblerr_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
if (!result_td->parent_ed_p->ed_desc.is_ep_in)
return NO_ACTION;
result_td->err_cnt = 0;
result_td->error_code = USB_ERR_STATUS_BBLERR;
clear_ch_intr(result_td->cur_stransfer.alloc_chnum, CH_STATUS_ALL);
/* Mask ack Interrupt.. */
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
result_td->parent_ed_p->ed_status.is_ping_enable = false;
/* we just calculate the size of the transferred data
on Data Stage of Control Transfer. */
if (result_td->standard_dev_req_info.
conrol_transfer_stage == DATA_STAGE)
result_td->transferred_szie +=
calc_transferred_size(false, result_td, hcinfo);
return DE_ALLOCATE;
}
/******************************************************************************/
/*!
* @name u8 process_datatgl_on_control(struct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function deals with the datatglerr event
* the datatglerr event is occured at IN Transfer.
* this function just resets result_td->err_cnt
* and masks ack/nak/DataTgl of HCINTMSK.
* finally, this function clears datatglerr bit of HCINT.
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return NO_ACTION
*/
/******************************************************************************/
static u8 process_datatgl_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
result_td->err_cnt = 0;
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
return NO_ACTION;
}
/******************************************************************************/
/*!
* @name u8 process_chhltd_on_control(truct td *result_td,
* struct hc_info *hcinfo)
*
*
* @brief this function processes Channel Halt event
* firstly, this function checks the reason of the Channel Halt,
* and according to the reason,
* calls the sub-functions to process the result.
*
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return RE_TRANSMIT -if need to retransmit the result_td.
* RE_SCHEDULE -if need to reschedule the result_td.
* DE_ALLOCATE -if USB Transfer is completed.
*/
/******************************************************************************/
static u8 process_chhltd_on_control(struct td *result_td,
struct hc_info *hcinfo)
{
if (hcinfo->hc_int.b.xfercompl)
return process_xfercompl_on_control(result_td, hcinfo);
else if (hcinfo->hc_int.b.stall)
return process_stall_on_control(result_td, hcinfo);
else if (hcinfo->hc_int.b.bblerr)
return process_bblerr_on_control(result_td, hcinfo);
else if (hcinfo->hc_int.b.xacterr)
return process_xacterr_on_control(result_td, hcinfo);
else if (hcinfo->hc_int.b.nak)
return process_nak_on_control(result_td, hcinfo);
else if (hcinfo->hc_int.b.nyet)
return process_nyet_on_control(result_td, hcinfo);
else {
/* Occure Error State.....*/
clear_ch_intr(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ALL);
/* Mask ack Interrupt.. */
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_ACK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_NAK);
mask_channel_interrupt(result_td->cur_stransfer.alloc_chnum,
CH_STATUS_DataTglErr);
result_td->err_cnt++;
if (result_td->err_cnt == 3) {
result_td->error_code = USB_ERR_STATUS_XACTERR;
result_td->err_cnt = 0;
return DE_ALLOCATE;
}
return RE_TRANSMIT;
}
return USB_ERR_SUCCESS;
}
/******************************************************************************/
/*!
* @name u8 process_control_transfer(struct td *result_td,
* struct hc_info *hcinfo)
*
* @brief this function processes the result of the Control Transfer.
* firstly, this function checks the result the Control Transfer.
* and according to the result, calls the sub-functions
* to process the result.
*
*
* @param [IN] result_td
* -indicates the pointer of the struct td to be mapped with the uChNum.
* [IN] ubChNum
* -indicates the number of the channel to be interrupted.
* [IN] hcinfo
* -indicates the interrupt information of the Channel to be interrupted
*
* @return RE_TRANSMIT -if need to retransmit the result_td.
* RE_SCHEDULE -if need to reschedule the result_td.
* DE_ALLOCATE -if USB Transfer is completed.
*/
/******************************************************************************/
static u8 process_control_transfer(struct td *result_td,
struct hc_info *hcinfo)
{
hcintn_t hcintr_info;
u8 ret_val = 0;
/* we just deal with the interrupts to be unmasked. */
hcintr_info.d32 = hcinfo->hc_int.d32 &
result_td->cur_stransfer.hc_reg.hc_int_msk.d32;
if (result_td->parent_ed_p->ed_desc.is_ep_in) {
if (hcintr_info.b.chhltd)
ret_val = process_chhltd_on_control(result_td, hcinfo);
else if (hcintr_info.b.ack)
ret_val = process_ack_on_control(result_td, hcinfo);
else if (hcintr_info.b.nak)
ret_val = process_nak_on_control(result_td, hcinfo);
else if (hcintr_info.b.datatglerr)
ret_val = process_datatgl_on_control(result_td, hcinfo);
} else {
if (hcintr_info.b.chhltd)
ret_val = process_chhltd_on_control(result_td, hcinfo);
else if (hcintr_info.b.ack)
ret_val = process_ack_on_control(result_td, hcinfo);
}
return ret_val;
}
|
