forked from microsoft/WSL2-Linux-Kernel
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathbas-gigaset.c
2679 lines (2401 loc) · 71.6 KB
/
bas-gigaset.c
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
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* USB driver for Gigaset 307x base via direct USB connection.
*
* Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
* Tilman Schmidt <tilman@imap.cc>,
* Stefan Eilers.
*
* =====================================================================
* 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.
* =====================================================================
*/
#include "gigaset.h"
#include <linux/usb.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
/* Version Information */
#define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
#define DRIVER_DESC "USB Driver for Gigaset 307x"
/* Module parameters */
static int startmode = SM_ISDN;
static int cidmode = 1;
module_param(startmode, int, S_IRUGO);
module_param(cidmode, int, S_IRUGO);
MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
MODULE_PARM_DESC(cidmode, "Call-ID mode");
#define GIGASET_MINORS 1
#define GIGASET_MINOR 16
#define GIGASET_MODULENAME "bas_gigaset"
#define GIGASET_DEVNAME "ttyGB"
/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
#define IF_WRITEBUF 264
/* interrupt pipe message size according to ibid. ch. 2.2 */
#define IP_MSGSIZE 3
/* Values for the Gigaset 307x */
#define USB_GIGA_VENDOR_ID 0x0681
#define USB_3070_PRODUCT_ID 0x0001
#define USB_3075_PRODUCT_ID 0x0002
#define USB_SX303_PRODUCT_ID 0x0021
#define USB_SX353_PRODUCT_ID 0x0022
/* table of devices that work with this driver */
static const struct usb_device_id gigaset_table[] = {
{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) },
{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) },
{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) },
{ USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, gigaset_table);
/*======================= local function prototypes ==========================*/
/* function called if a new device belonging to this driver is connected */
static int gigaset_probe(struct usb_interface *interface,
const struct usb_device_id *id);
/* Function will be called if the device is unplugged */
static void gigaset_disconnect(struct usb_interface *interface);
/* functions called before/after suspend */
static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
static int gigaset_resume(struct usb_interface *intf);
/* functions called before/after device reset */
static int gigaset_pre_reset(struct usb_interface *intf);
static int gigaset_post_reset(struct usb_interface *intf);
static int atread_submit(struct cardstate *, int);
static void stopurbs(struct bas_bc_state *);
static int req_submit(struct bc_state *, int, int, int);
static int atwrite_submit(struct cardstate *, unsigned char *, int);
static int start_cbsend(struct cardstate *);
/*============================================================================*/
struct bas_cardstate {
struct usb_device *udev; /* USB device pointer */
struct usb_interface *interface; /* interface for this device */
unsigned char minor; /* starting minor number */
struct urb *urb_ctrl; /* control pipe default URB */
struct usb_ctrlrequest dr_ctrl;
struct timer_list timer_ctrl; /* control request timeout */
int retry_ctrl;
struct timer_list timer_atrdy; /* AT command ready timeout */
struct urb *urb_cmd_out; /* for sending AT commands */
struct usb_ctrlrequest dr_cmd_out;
int retry_cmd_out;
struct urb *urb_cmd_in; /* for receiving AT replies */
struct usb_ctrlrequest dr_cmd_in;
struct timer_list timer_cmd_in; /* receive request timeout */
unsigned char *rcvbuf; /* AT reply receive buffer */
struct urb *urb_int_in; /* URB for interrupt pipe */
unsigned char *int_in_buf;
struct work_struct int_in_wq; /* for usb_clear_halt() */
struct timer_list timer_int_in; /* int read retry delay */
int retry_int_in;
spinlock_t lock; /* locks all following */
int basstate; /* bitmap (BS_*) */
int pending; /* uncompleted base request */
wait_queue_head_t waitqueue;
int rcvbuf_size; /* size of AT receive buffer */
/* 0: no receive in progress */
int retry_cmd_in; /* receive req retry count */
};
/* status of direct USB connection to 307x base (bits in basstate) */
#define BS_ATOPEN 0x001 /* AT channel open */
#define BS_B1OPEN 0x002 /* B channel 1 open */
#define BS_B2OPEN 0x004 /* B channel 2 open */
#define BS_ATREADY 0x008 /* base ready for AT command */
#define BS_INIT 0x010 /* base has signalled INIT_OK */
#define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
#define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
#define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
#define BS_SUSPEND 0x100 /* USB port suspended */
#define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
static struct gigaset_driver *driver;
/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver gigaset_usb_driver = {
.name = GIGASET_MODULENAME,
.probe = gigaset_probe,
.disconnect = gigaset_disconnect,
.id_table = gigaset_table,
.suspend = gigaset_suspend,
.resume = gigaset_resume,
.reset_resume = gigaset_post_reset,
.pre_reset = gigaset_pre_reset,
.post_reset = gigaset_post_reset,
.disable_hub_initiated_lpm = 1,
};
/* get message text for usb_submit_urb return code
*/
static char *get_usb_rcmsg(int rc)
{
static char unkmsg[28];
switch (rc) {
case 0:
return "success";
case -ENOMEM:
return "out of memory";
case -ENODEV:
return "device not present";
case -ENOENT:
return "endpoint not present";
case -ENXIO:
return "URB type not supported";
case -EINVAL:
return "invalid argument";
case -EAGAIN:
return "start frame too early or too much scheduled";
case -EFBIG:
return "too many isoc frames requested";
case -EPIPE:
return "endpoint stalled";
case -EMSGSIZE:
return "invalid packet size";
case -ENOSPC:
return "would overcommit USB bandwidth";
case -ESHUTDOWN:
return "device shut down";
case -EPERM:
return "reject flag set";
case -EHOSTUNREACH:
return "device suspended";
default:
snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc);
return unkmsg;
}
}
/* get message text for USB status code
*/
static char *get_usb_statmsg(int status)
{
static char unkmsg[28];
switch (status) {
case 0:
return "success";
case -ENOENT:
return "unlinked (sync)";
case -EINPROGRESS:
return "URB still pending";
case -EPROTO:
return "bitstuff error, timeout, or unknown USB error";
case -EILSEQ:
return "CRC mismatch, timeout, or unknown USB error";
case -ETIME:
return "USB response timeout";
case -EPIPE:
return "endpoint stalled";
case -ECOMM:
return "IN buffer overrun";
case -ENOSR:
return "OUT buffer underrun";
case -EOVERFLOW:
return "endpoint babble";
case -EREMOTEIO:
return "short packet";
case -ENODEV:
return "device removed";
case -EXDEV:
return "partial isoc transfer";
case -EINVAL:
return "ISO madness";
case -ECONNRESET:
return "unlinked (async)";
case -ESHUTDOWN:
return "device shut down";
default:
snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status);
return unkmsg;
}
}
/* usb_pipetype_str
* retrieve string representation of USB pipe type
*/
static inline char *usb_pipetype_str(int pipe)
{
if (usb_pipeisoc(pipe))
return "Isoc";
if (usb_pipeint(pipe))
return "Int";
if (usb_pipecontrol(pipe))
return "Ctrl";
if (usb_pipebulk(pipe))
return "Bulk";
return "?";
}
/* dump_urb
* write content of URB to syslog for debugging
*/
static inline void dump_urb(enum debuglevel level, const char *tag,
struct urb *urb)
{
#ifdef CONFIG_GIGASET_DEBUG
int i;
gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb);
if (urb) {
gig_dbg(level,
" dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
"hcpriv=0x%08lx, transfer_flags=0x%x,",
(unsigned long) urb->dev,
usb_pipetype_str(urb->pipe),
usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
usb_pipein(urb->pipe) ? "in" : "out",
(unsigned long) urb->hcpriv,
urb->transfer_flags);
gig_dbg(level,
" transfer_buffer=0x%08lx[%d], actual_length=%d, "
"setup_packet=0x%08lx,",
(unsigned long) urb->transfer_buffer,
urb->transfer_buffer_length, urb->actual_length,
(unsigned long) urb->setup_packet);
gig_dbg(level,
" start_frame=%d, number_of_packets=%d, interval=%d, "
"error_count=%d,",
urb->start_frame, urb->number_of_packets, urb->interval,
urb->error_count);
gig_dbg(level,
" context=0x%08lx, complete=0x%08lx, "
"iso_frame_desc[]={",
(unsigned long) urb->context,
(unsigned long) urb->complete);
for (i = 0; i < urb->number_of_packets; i++) {
struct usb_iso_packet_descriptor *pifd
= &urb->iso_frame_desc[i];
gig_dbg(level,
" {offset=%u, length=%u, actual_length=%u, "
"status=%u}",
pifd->offset, pifd->length, pifd->actual_length,
pifd->status);
}
}
gig_dbg(level, "}}");
#endif
}
/* read/set modem control bits etc. (m10x only) */
static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
unsigned new_state)
{
return -EINVAL;
}
static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
{
return -EINVAL;
}
static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
{
return -EINVAL;
}
/* set/clear bits in base connection state, return previous state
*/
static inline int update_basstate(struct bas_cardstate *ucs,
int set, int clear)
{
unsigned long flags;
int state;
spin_lock_irqsave(&ucs->lock, flags);
state = ucs->basstate;
ucs->basstate = (state & ~clear) | set;
spin_unlock_irqrestore(&ucs->lock, flags);
return state;
}
/* error_hangup
* hang up any existing connection because of an unrecoverable error
* This function may be called from any context and takes care of scheduling
* the necessary actions for execution outside of interrupt context.
* cs->lock must not be held.
* argument:
* B channel control structure
*/
static inline void error_hangup(struct bc_state *bcs)
{
struct cardstate *cs = bcs->cs;
gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL);
gigaset_schedule_event(cs);
}
/* error_reset
* reset Gigaset device because of an unrecoverable error
* This function may be called from any context, and takes care of
* scheduling the necessary actions for execution outside of interrupt context.
* cs->hw.bas->lock must not be held.
* argument:
* controller state structure
*/
static inline void error_reset(struct cardstate *cs)
{
/* reset interrupt pipe to recover (ignore errors) */
update_basstate(cs->hw.bas, BS_RESETTING, 0);
if (req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT))
/* submission failed, escalate to USB port reset */
usb_queue_reset_device(cs->hw.bas->interface);
}
/* check_pending
* check for completion of pending control request
* parameter:
* ucs hardware specific controller state structure
*/
static void check_pending(struct bas_cardstate *ucs)
{
unsigned long flags;
spin_lock_irqsave(&ucs->lock, flags);
switch (ucs->pending) {
case 0:
break;
case HD_OPEN_ATCHANNEL:
if (ucs->basstate & BS_ATOPEN)
ucs->pending = 0;
break;
case HD_OPEN_B1CHANNEL:
if (ucs->basstate & BS_B1OPEN)
ucs->pending = 0;
break;
case HD_OPEN_B2CHANNEL:
if (ucs->basstate & BS_B2OPEN)
ucs->pending = 0;
break;
case HD_CLOSE_ATCHANNEL:
if (!(ucs->basstate & BS_ATOPEN))
ucs->pending = 0;
break;
case HD_CLOSE_B1CHANNEL:
if (!(ucs->basstate & BS_B1OPEN))
ucs->pending = 0;
break;
case HD_CLOSE_B2CHANNEL:
if (!(ucs->basstate & BS_B2OPEN))
ucs->pending = 0;
break;
case HD_DEVICE_INIT_ACK: /* no reply expected */
ucs->pending = 0;
break;
case HD_RESET_INTERRUPT_PIPE:
if (!(ucs->basstate & BS_RESETTING))
ucs->pending = 0;
break;
/*
* HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
* and should never end up here
*/
default:
dev_warn(&ucs->interface->dev,
"unknown pending request 0x%02x cleared\n",
ucs->pending);
ucs->pending = 0;
}
if (!ucs->pending)
del_timer(&ucs->timer_ctrl);
spin_unlock_irqrestore(&ucs->lock, flags);
}
/* cmd_in_timeout
* timeout routine for command input request
* argument:
* controller state structure
*/
static void cmd_in_timeout(unsigned long data)
{
struct cardstate *cs = (struct cardstate *) data;
struct bas_cardstate *ucs = cs->hw.bas;
int rc;
if (!ucs->rcvbuf_size) {
gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
return;
}
if (ucs->retry_cmd_in++ >= BAS_RETRY) {
dev_err(cs->dev,
"control read: timeout, giving up after %d tries\n",
ucs->retry_cmd_in);
kfree(ucs->rcvbuf);
ucs->rcvbuf = NULL;
ucs->rcvbuf_size = 0;
error_reset(cs);
return;
}
gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d",
__func__, ucs->retry_cmd_in);
rc = atread_submit(cs, BAS_TIMEOUT);
if (rc < 0) {
kfree(ucs->rcvbuf);
ucs->rcvbuf = NULL;
ucs->rcvbuf_size = 0;
if (rc != -ENODEV)
error_reset(cs);
}
}
/* read_ctrl_callback
* USB completion handler for control pipe input
* called by the USB subsystem in interrupt context
* parameter:
* urb USB request block
* urb->context = inbuf structure for controller state
*/
static void read_ctrl_callback(struct urb *urb)
{
struct inbuf_t *inbuf = urb->context;
struct cardstate *cs = inbuf->cs;
struct bas_cardstate *ucs = cs->hw.bas;
int status = urb->status;
unsigned numbytes;
int rc;
update_basstate(ucs, 0, BS_ATRDPEND);
wake_up(&ucs->waitqueue);
del_timer(&ucs->timer_cmd_in);
switch (status) {
case 0: /* normal completion */
numbytes = urb->actual_length;
if (unlikely(numbytes != ucs->rcvbuf_size)) {
dev_warn(cs->dev,
"control read: received %d chars, expected %d\n",
numbytes, ucs->rcvbuf_size);
if (numbytes > ucs->rcvbuf_size)
numbytes = ucs->rcvbuf_size;
}
/* copy received bytes to inbuf, notify event layer */
if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) {
gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
gigaset_schedule_event(cs);
}
break;
case -ENOENT: /* cancelled */
case -ECONNRESET: /* cancelled (async) */
case -EINPROGRESS: /* pending */
case -ENODEV: /* device removed */
case -ESHUTDOWN: /* device shut down */
/* no further action necessary */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(status));
break;
default: /* other errors: retry */
if (ucs->retry_cmd_in++ < BAS_RETRY) {
gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__,
get_usb_statmsg(status), ucs->retry_cmd_in);
rc = atread_submit(cs, BAS_TIMEOUT);
if (rc >= 0)
/* successfully resubmitted, skip freeing */
return;
if (rc == -ENODEV)
/* disconnect, no further action necessary */
break;
}
dev_err(cs->dev, "control read: %s, giving up after %d tries\n",
get_usb_statmsg(status), ucs->retry_cmd_in);
error_reset(cs);
}
/* read finished, free buffer */
kfree(ucs->rcvbuf);
ucs->rcvbuf = NULL;
ucs->rcvbuf_size = 0;
}
/* atread_submit
* submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
* parameters:
* cs controller state structure
* timeout timeout in 1/10 sec., 0: none
* return value:
* 0 on success
* -EBUSY if another request is pending
* any URB submission error code
*/
static int atread_submit(struct cardstate *cs, int timeout)
{
struct bas_cardstate *ucs = cs->hw.bas;
int basstate;
int ret;
gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)",
ucs->rcvbuf_size);
basstate = update_basstate(ucs, BS_ATRDPEND, 0);
if (basstate & BS_ATRDPEND) {
dev_err(cs->dev,
"could not submit HD_READ_ATMESSAGE: URB busy\n");
return -EBUSY;
}
if (basstate & BS_SUSPEND) {
dev_notice(cs->dev,
"HD_READ_ATMESSAGE not submitted, "
"suspend in progress\n");
update_basstate(ucs, 0, BS_ATRDPEND);
/* treat like disconnect */
return -ENODEV;
}
ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ;
ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE;
ucs->dr_cmd_in.wValue = 0;
ucs->dr_cmd_in.wIndex = 0;
ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size);
usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev,
usb_rcvctrlpipe(ucs->udev, 0),
(unsigned char *) &ucs->dr_cmd_in,
ucs->rcvbuf, ucs->rcvbuf_size,
read_ctrl_callback, cs->inbuf);
ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC);
if (ret != 0) {
update_basstate(ucs, 0, BS_ATRDPEND);
dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n",
get_usb_rcmsg(ret));
return ret;
}
if (timeout > 0) {
gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
mod_timer(&ucs->timer_cmd_in, jiffies + timeout * HZ / 10);
}
return 0;
}
/* int_in_work
* workqueue routine to clear halt on interrupt in endpoint
*/
static void int_in_work(struct work_struct *work)
{
struct bas_cardstate *ucs =
container_of(work, struct bas_cardstate, int_in_wq);
struct urb *urb = ucs->urb_int_in;
struct cardstate *cs = urb->context;
int rc;
/* clear halt condition */
rc = usb_clear_halt(ucs->udev, urb->pipe);
gig_dbg(DEBUG_USBREQ, "clear_halt: %s", get_usb_rcmsg(rc));
if (rc == 0)
/* success, resubmit interrupt read URB */
rc = usb_submit_urb(urb, GFP_ATOMIC);
switch (rc) {
case 0: /* success */
case -ENODEV: /* device gone */
case -EINVAL: /* URB already resubmitted, or terminal badness */
break;
default: /* failure: try to recover by resetting the device */
dev_err(cs->dev, "clear halt failed: %s\n", get_usb_rcmsg(rc));
rc = usb_lock_device_for_reset(ucs->udev, ucs->interface);
if (rc == 0) {
rc = usb_reset_device(ucs->udev);
usb_unlock_device(ucs->udev);
}
}
ucs->retry_int_in = 0;
}
/* int_in_resubmit
* timer routine for interrupt read delayed resubmit
* argument:
* controller state structure
*/
static void int_in_resubmit(unsigned long data)
{
struct cardstate *cs = (struct cardstate *) data;
struct bas_cardstate *ucs = cs->hw.bas;
int rc;
if (ucs->retry_int_in++ >= BAS_RETRY) {
dev_err(cs->dev, "interrupt read: giving up after %d tries\n",
ucs->retry_int_in);
usb_queue_reset_device(ucs->interface);
return;
}
gig_dbg(DEBUG_USBREQ, "%s: retry %d", __func__, ucs->retry_int_in);
rc = usb_submit_urb(ucs->urb_int_in, GFP_ATOMIC);
if (rc != 0 && rc != -ENODEV) {
dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
get_usb_rcmsg(rc));
usb_queue_reset_device(ucs->interface);
}
}
/* read_int_callback
* USB completion handler for interrupt pipe input
* called by the USB subsystem in interrupt context
* parameter:
* urb USB request block
* urb->context = controller state structure
*/
static void read_int_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
struct bas_cardstate *ucs = cs->hw.bas;
struct bc_state *bcs;
int status = urb->status;
unsigned long flags;
int rc;
unsigned l;
int channel;
switch (status) {
case 0: /* success */
ucs->retry_int_in = 0;
break;
case -EPIPE: /* endpoint stalled */
schedule_work(&ucs->int_in_wq);
/* fall through */
case -ENOENT: /* cancelled */
case -ECONNRESET: /* cancelled (async) */
case -EINPROGRESS: /* pending */
case -ENODEV: /* device removed */
case -ESHUTDOWN: /* device shut down */
/* no further action necessary */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(status));
return;
case -EPROTO: /* protocol error or unplug */
case -EILSEQ:
case -ETIME:
/* resubmit after delay */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(status));
mod_timer(&ucs->timer_int_in, jiffies + HZ / 10);
return;
default: /* other errors: just resubmit */
dev_warn(cs->dev, "interrupt read: %s\n",
get_usb_statmsg(status));
goto resubmit;
}
/* drop incomplete packets even if the missing bytes wouldn't matter */
if (unlikely(urb->actual_length < IP_MSGSIZE)) {
dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n",
urb->actual_length);
goto resubmit;
}
l = (unsigned) ucs->int_in_buf[1] +
(((unsigned) ucs->int_in_buf[2]) << 8);
gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
urb->actual_length, (int)ucs->int_in_buf[0], l,
(int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]);
channel = 0;
switch (ucs->int_in_buf[0]) {
case HD_DEVICE_INIT_OK:
update_basstate(ucs, BS_INIT, 0);
break;
case HD_READY_SEND_ATDATA:
del_timer(&ucs->timer_atrdy);
update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
start_cbsend(cs);
break;
case HD_OPEN_B2CHANNEL_ACK:
++channel;
case HD_OPEN_B1CHANNEL_ACK:
bcs = cs->bcs + channel;
update_basstate(ucs, BS_B1OPEN << channel, 0);
gigaset_bchannel_up(bcs);
break;
case HD_OPEN_ATCHANNEL_ACK:
update_basstate(ucs, BS_ATOPEN, 0);
start_cbsend(cs);
break;
case HD_CLOSE_B2CHANNEL_ACK:
++channel;
case HD_CLOSE_B1CHANNEL_ACK:
bcs = cs->bcs + channel;
update_basstate(ucs, 0, BS_B1OPEN << channel);
stopurbs(bcs->hw.bas);
gigaset_bchannel_down(bcs);
break;
case HD_CLOSE_ATCHANNEL_ACK:
update_basstate(ucs, 0, BS_ATOPEN);
break;
case HD_B2_FLOW_CONTROL:
++channel;
case HD_B1_FLOW_CONTROL:
bcs = cs->bcs + channel;
atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES,
&bcs->hw.bas->corrbytes);
gig_dbg(DEBUG_ISO,
"Flow control (channel %d, sub %d): 0x%02x => %d",
channel, bcs->hw.bas->numsub, l,
atomic_read(&bcs->hw.bas->corrbytes));
break;
case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */
if (!l) {
dev_warn(cs->dev,
"HD_RECEIVEATDATA_ACK with length 0 ignored\n");
break;
}
spin_lock_irqsave(&cs->lock, flags);
if (ucs->basstate & BS_ATRDPEND) {
spin_unlock_irqrestore(&cs->lock, flags);
dev_warn(cs->dev,
"HD_RECEIVEATDATA_ACK(%d) during HD_READ_ATMESSAGE(%d) ignored\n",
l, ucs->rcvbuf_size);
break;
}
if (ucs->rcvbuf_size) {
/* throw away previous buffer - we have no queue */
dev_err(cs->dev,
"receive AT data overrun, %d bytes lost\n",
ucs->rcvbuf_size);
kfree(ucs->rcvbuf);
ucs->rcvbuf_size = 0;
}
ucs->rcvbuf = kmalloc(l, GFP_ATOMIC);
if (ucs->rcvbuf == NULL) {
spin_unlock_irqrestore(&cs->lock, flags);
dev_err(cs->dev, "out of memory receiving AT data\n");
break;
}
ucs->rcvbuf_size = l;
ucs->retry_cmd_in = 0;
rc = atread_submit(cs, BAS_TIMEOUT);
if (rc < 0) {
kfree(ucs->rcvbuf);
ucs->rcvbuf = NULL;
ucs->rcvbuf_size = 0;
}
spin_unlock_irqrestore(&cs->lock, flags);
if (rc < 0 && rc != -ENODEV)
error_reset(cs);
break;
case HD_RESET_INTERRUPT_PIPE_ACK:
update_basstate(ucs, 0, BS_RESETTING);
dev_notice(cs->dev, "interrupt pipe reset\n");
break;
case HD_SUSPEND_END:
gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END");
break;
default:
dev_warn(cs->dev,
"unknown Gigaset signal 0x%02x (%u) ignored\n",
(int) ucs->int_in_buf[0], l);
}
check_pending(ucs);
wake_up(&ucs->waitqueue);
resubmit:
rc = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(rc != 0 && rc != -ENODEV)) {
dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
get_usb_rcmsg(rc));
error_reset(cs);
}
}
/* read_iso_callback
* USB completion handler for B channel isochronous input
* called by the USB subsystem in interrupt context
* parameter:
* urb USB request block of completed request
* urb->context = bc_state structure
*/
static void read_iso_callback(struct urb *urb)
{
struct bc_state *bcs;
struct bas_bc_state *ubc;
int status = urb->status;
unsigned long flags;
int i, rc;
/* status codes not worth bothering the tasklet with */
if (unlikely(status == -ENOENT ||
status == -ECONNRESET ||
status == -EINPROGRESS ||
status == -ENODEV ||
status == -ESHUTDOWN)) {
gig_dbg(DEBUG_ISO, "%s: %s",
__func__, get_usb_statmsg(status));
return;
}
bcs = urb->context;
ubc = bcs->hw.bas;
spin_lock_irqsave(&ubc->isoinlock, flags);
if (likely(ubc->isoindone == NULL)) {
/* pass URB to tasklet */
ubc->isoindone = urb;
ubc->isoinstatus = status;
tasklet_hi_schedule(&ubc->rcvd_tasklet);
} else {
/* tasklet still busy, drop data and resubmit URB */
gig_dbg(DEBUG_ISO, "%s: overrun", __func__);
ubc->loststatus = status;
for (i = 0; i < BAS_NUMFRAMES; i++) {
ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
if (unlikely(urb->iso_frame_desc[i].status != 0 &&
urb->iso_frame_desc[i].status != -EINPROGRESS))
ubc->loststatus = urb->iso_frame_desc[i].status;
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
if (likely(ubc->running)) {
/* urb->dev is clobbered by USB subsystem */
urb->dev = bcs->cs->hw.bas->udev;
urb->transfer_flags = URB_ISO_ASAP;
urb->number_of_packets = BAS_NUMFRAMES;
rc = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(rc != 0 && rc != -ENODEV)) {
dev_err(bcs->cs->dev,
"could not resubmit isoc read URB: %s\n",
get_usb_rcmsg(rc));
dump_urb(DEBUG_ISO, "isoc read", urb);
error_hangup(bcs);
}
}
}
spin_unlock_irqrestore(&ubc->isoinlock, flags);
}
/* write_iso_callback
* USB completion handler for B channel isochronous output
* called by the USB subsystem in interrupt context
* parameter:
* urb USB request block of completed request
* urb->context = isow_urbctx_t structure
*/
static void write_iso_callback(struct urb *urb)
{
struct isow_urbctx_t *ucx;
struct bas_bc_state *ubc;
int status = urb->status;
unsigned long flags;
/* status codes not worth bothering the tasklet with */
if (unlikely(status == -ENOENT ||
status == -ECONNRESET ||
status == -EINPROGRESS ||
status == -ENODEV ||
status == -ESHUTDOWN)) {
gig_dbg(DEBUG_ISO, "%s: %s",
__func__, get_usb_statmsg(status));
return;
}
/* pass URB context to tasklet */
ucx = urb->context;
ubc = ucx->bcs->hw.bas;
ucx->status = status;
spin_lock_irqsave(&ubc->isooutlock, flags);
ubc->isooutovfl = ubc->isooutdone;
ubc->isooutdone = ucx;
spin_unlock_irqrestore(&ubc->isooutlock, flags);
tasklet_hi_schedule(&ubc->sent_tasklet);
}
/* starturbs
* prepare and submit USB request blocks for isochronous input and output
* argument:
* B channel control structure
* return value:
* 0 on success
* < 0 on error (no URBs submitted)
*/
static int starturbs(struct bc_state *bcs)
{
struct bas_bc_state *ubc = bcs->hw.bas;
struct urb *urb;
int j, k;
int rc;
/* initialize L2 reception */
if (bcs->proto2 == L2_HDLC)
bcs->inputstate |= INS_flag_hunt;
/* submit all isochronous input URBs */
ubc->running = 1;
for (k = 0; k < BAS_INURBS; k++) {
urb = ubc->isoinurbs[k];
if (!urb) {
rc = -EFAULT;
goto error;
}
urb->dev = bcs->cs->hw.bas->udev;
urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel);
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE;
urb->transfer_buffer_length = BAS_INBUFSIZE;
urb->number_of_packets = BAS_NUMFRAMES;
urb->interval = BAS_FRAMETIME;
urb->complete = read_iso_callback;
urb->context = bcs;
for (j = 0; j < BAS_NUMFRAMES; j++) {
urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME;
urb->iso_frame_desc[j].length = BAS_MAXFRAME;
urb->iso_frame_desc[j].status = 0;
urb->iso_frame_desc[j].actual_length = 0;
}
dump_urb(DEBUG_ISO, "Initial isoc read", urb);
rc = usb_submit_urb(urb, GFP_ATOMIC);
if (rc != 0)
goto error;
}
/* initialize L2 transmission */
gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG);
/* set up isochronous output URBs for flag idling */