-
Notifications
You must be signed in to change notification settings - Fork 102
/
cp210x.c
2037 lines (1750 loc) · 59.9 KB
/
cp210x.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
// SPDX-License-Identifier: GPL-2.0
/*
* Silicon Laboratories CP210x USB to RS232 serial adaptor driver
*
* Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
* Copyright (C) 2010-2021 Johan Hovold (johan@kernel.org)
*
* Support to set flow control line levels using TIOCMGET and TIOCMSET
* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
* control thanks to Munir Nassar nassarmu@real-time.com
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/gpio/driver.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
/*
* Function Prototypes
*/
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
static void cp210x_close(struct usb_serial_port *);
static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
struct ktermios *);
static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
struct ktermios*);
static bool cp210x_tx_empty(struct usb_serial_port *port);
static int cp210x_tiocmget(struct tty_struct *);
static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
static int cp210x_tiocmset_port(struct usb_serial_port *port,
unsigned int, unsigned int);
static void cp210x_break_ctl(struct tty_struct *, int);
static int cp210x_attach(struct usb_serial *);
static void cp210x_disconnect(struct usb_serial *);
static void cp210x_release(struct usb_serial *);
static int cp210x_port_probe(struct usb_serial_port *);
static void cp210x_port_remove(struct usb_serial_port *);
static void cp210x_dtr_rts(struct usb_serial_port *port, int on);
static void cp210x_process_read_urb(struct urb *urb);
static void cp210x_enable_event_mode(struct usb_serial_port *port);
static void cp210x_disable_event_mode(struct usb_serial_port *port);
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
{ USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
{ USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
{ USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
{ USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
{ USB_DEVICE(0x0988, 0x0578) }, /* Teraoka AD2000 */
{ USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
{ USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
{ USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
{ USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
{ USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
{ USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
{ USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
{ USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
{ USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
{ USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
{ USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
{ USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
{ USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
{ USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
{ USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
{ USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
{ USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
{ USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
{ USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
{ USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
{ USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
{ USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
{ USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
{ USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
{ USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
{ USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
{ USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
{ USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
{ USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
{ USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
{ USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
{ USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
{ USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
{ USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
{ USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
{ USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
{ USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
{ USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
{ USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
{ USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
{ USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
{ USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
{ USB_DEVICE(0x10C4, 0x88D8) }, /* Acuity Brands nLight Air Adapter */
{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
{ USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
{ USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
{ USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
{ USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
{ USB_DEVICE(0x10C4, 0x8A5B) }, /* CEL EM3588 ZigBee USB Stick */
{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
{ USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
{ USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */
{ USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */
{ USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
{ USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
{ USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
{ USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
{ USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
{ USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
{ USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
{ USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
{ USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
{ USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
{ USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */
{ USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
{ USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
{ USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
{ USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
{ USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
{ USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
{ USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
{ USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
{ USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
{ USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
{ USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
{ USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */
{ USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */
{ USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
{ USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
{ USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
{ USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
{ USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
{ USB_DEVICE(0x1901, 0x0197) }, /* GE CS1000 M.2 Key E serial interface */
{ USB_DEVICE(0x1901, 0x0198) }, /* GE CS1000 Display serial interface */
{ USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */
{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
{ USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
{ USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
{ USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
{ USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
{ USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
{ USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
{ USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
{ USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
{ USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
{ USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
{ USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
{ USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
{ USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
{ USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
{ USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
{ USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
{ USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
{ USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
{ USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
{ USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
{ USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
{ USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
{ USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
{ USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
{ USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
{ USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
{ USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */
{ USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
{ } /* Terminating Entry */
};
MODULE_DEVICE_TABLE(usb, id_table);
struct cp210x_serial_private {
#ifdef CONFIG_GPIOLIB
struct gpio_chip gc;
bool gpio_registered;
u8 gpio_pushpull;
u8 gpio_altfunc;
u8 gpio_input;
#endif
u8 partnum;
u32 fw_version;
speed_t min_speed;
speed_t max_speed;
bool use_actual_rate;
bool no_flow_control;
};
enum cp210x_event_state {
ES_DATA,
ES_ESCAPE,
ES_LSR,
ES_LSR_DATA_0,
ES_LSR_DATA_1,
ES_MSR
};
struct cp210x_port_private {
u8 bInterfaceNumber;
bool event_mode;
enum cp210x_event_state event_state;
u8 lsr;
struct mutex mutex;
bool crtscts;
bool dtr;
bool rts;
};
static struct usb_serial_driver cp210x_device = {
.driver = {
.owner = THIS_MODULE,
.name = "cp210x",
},
.id_table = id_table,
.num_ports = 1,
.bulk_in_size = 256,
.bulk_out_size = 256,
.open = cp210x_open,
.close = cp210x_close,
.break_ctl = cp210x_break_ctl,
.set_termios = cp210x_set_termios,
.tx_empty = cp210x_tx_empty,
.throttle = usb_serial_generic_throttle,
.unthrottle = usb_serial_generic_unthrottle,
.tiocmget = cp210x_tiocmget,
.tiocmset = cp210x_tiocmset,
.get_icount = usb_serial_generic_get_icount,
.attach = cp210x_attach,
.disconnect = cp210x_disconnect,
.release = cp210x_release,
.port_probe = cp210x_port_probe,
.port_remove = cp210x_port_remove,
.dtr_rts = cp210x_dtr_rts,
.process_read_urb = cp210x_process_read_urb,
};
static struct usb_serial_driver * const serial_drivers[] = {
&cp210x_device, NULL
};
/* Config request types */
#define REQTYPE_HOST_TO_INTERFACE 0x41
#define REQTYPE_INTERFACE_TO_HOST 0xc1
#define REQTYPE_HOST_TO_DEVICE 0x40
#define REQTYPE_DEVICE_TO_HOST 0xc0
/* Config request codes */
#define CP210X_IFC_ENABLE 0x00
#define CP210X_SET_BAUDDIV 0x01
#define CP210X_GET_BAUDDIV 0x02
#define CP210X_SET_LINE_CTL 0x03
#define CP210X_GET_LINE_CTL 0x04
#define CP210X_SET_BREAK 0x05
#define CP210X_IMM_CHAR 0x06
#define CP210X_SET_MHS 0x07
#define CP210X_GET_MDMSTS 0x08
#define CP210X_SET_XON 0x09
#define CP210X_SET_XOFF 0x0A
#define CP210X_SET_EVENTMASK 0x0B
#define CP210X_GET_EVENTMASK 0x0C
#define CP210X_SET_CHAR 0x0D
#define CP210X_GET_CHARS 0x0E
#define CP210X_GET_PROPS 0x0F
#define CP210X_GET_COMM_STATUS 0x10
#define CP210X_RESET 0x11
#define CP210X_PURGE 0x12
#define CP210X_SET_FLOW 0x13
#define CP210X_GET_FLOW 0x14
#define CP210X_EMBED_EVENTS 0x15
#define CP210X_GET_EVENTSTATE 0x16
#define CP210X_SET_CHARS 0x19
#define CP210X_GET_BAUDRATE 0x1D
#define CP210X_SET_BAUDRATE 0x1E
#define CP210X_VENDOR_SPECIFIC 0xFF
/* CP210X_IFC_ENABLE */
#define UART_ENABLE 0x0001
#define UART_DISABLE 0x0000
/* CP210X_(SET|GET)_BAUDDIV */
#define BAUD_RATE_GEN_FREQ 0x384000
/* CP210X_(SET|GET)_LINE_CTL */
#define BITS_DATA_MASK 0X0f00
#define BITS_DATA_5 0X0500
#define BITS_DATA_6 0X0600
#define BITS_DATA_7 0X0700
#define BITS_DATA_8 0X0800
#define BITS_DATA_9 0X0900
#define BITS_PARITY_MASK 0x00f0
#define BITS_PARITY_NONE 0x0000
#define BITS_PARITY_ODD 0x0010
#define BITS_PARITY_EVEN 0x0020
#define BITS_PARITY_MARK 0x0030
#define BITS_PARITY_SPACE 0x0040
#define BITS_STOP_MASK 0x000f
#define BITS_STOP_1 0x0000
#define BITS_STOP_1_5 0x0001
#define BITS_STOP_2 0x0002
/* CP210X_SET_BREAK */
#define BREAK_ON 0x0001
#define BREAK_OFF 0x0000
/* CP210X_(SET_MHS|GET_MDMSTS) */
#define CONTROL_DTR 0x0001
#define CONTROL_RTS 0x0002
#define CONTROL_CTS 0x0010
#define CONTROL_DSR 0x0020
#define CONTROL_RING 0x0040
#define CONTROL_DCD 0x0080
#define CONTROL_WRITE_DTR 0x0100
#define CONTROL_WRITE_RTS 0x0200
/* CP210X_(GET|SET)_CHARS */
struct cp210x_special_chars {
u8 bEofChar;
u8 bErrorChar;
u8 bBreakChar;
u8 bEventChar;
u8 bXonChar;
u8 bXoffChar;
};
/* CP210X_VENDOR_SPECIFIC values */
#define CP210X_READ_2NCONFIG 0x000E
#define CP210X_GET_FW_VER_2N 0x0010
#define CP210X_READ_LATCH 0x00C2
#define CP210X_GET_PARTNUM 0x370B
#define CP210X_GET_PORTCONFIG 0x370C
#define CP210X_GET_DEVICEMODE 0x3711
#define CP210X_WRITE_LATCH 0x37E1
/* Part number definitions */
#define CP210X_PARTNUM_CP2101 0x01
#define CP210X_PARTNUM_CP2102 0x02
#define CP210X_PARTNUM_CP2103 0x03
#define CP210X_PARTNUM_CP2104 0x04
#define CP210X_PARTNUM_CP2105 0x05
#define CP210X_PARTNUM_CP2108 0x08
#define CP210X_PARTNUM_CP2102N_QFN28 0x20
#define CP210X_PARTNUM_CP2102N_QFN24 0x21
#define CP210X_PARTNUM_CP2102N_QFN20 0x22
#define CP210X_PARTNUM_UNKNOWN 0xFF
/* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
struct cp210x_comm_status {
__le32 ulErrors;
__le32 ulHoldReasons;
__le32 ulAmountInInQueue;
__le32 ulAmountInOutQueue;
u8 bEofReceived;
u8 bWaitForImmediate;
u8 bReserved;
} __packed;
/*
* CP210X_PURGE - 16 bits passed in wValue of USB request.
* SiLabs app note AN571 gives a strange description of the 4 bits:
* bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
* writing 1 to all, however, purges cp2108 well enough to avoid the hang.
*/
#define PURGE_ALL 0x000f
/* CP210X_EMBED_EVENTS */
#define CP210X_ESCCHAR 0xec
#define CP210X_LSR_OVERRUN BIT(1)
#define CP210X_LSR_PARITY BIT(2)
#define CP210X_LSR_FRAME BIT(3)
#define CP210X_LSR_BREAK BIT(4)
/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
struct cp210x_flow_ctl {
__le32 ulControlHandshake;
__le32 ulFlowReplace;
__le32 ulXonLimit;
__le32 ulXoffLimit;
};
/* cp210x_flow_ctl::ulControlHandshake */
#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
#define CP210X_SERIAL_DTR_INACTIVE (0 << 0)
#define CP210X_SERIAL_DTR_ACTIVE (1 << 0)
#define CP210X_SERIAL_DTR_FLOW_CTL (2 << 0)
#define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
#define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
#define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
#define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
/* cp210x_flow_ctl::ulFlowReplace */
#define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
#define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
#define CP210X_SERIAL_ERROR_CHAR BIT(2)
#define CP210X_SERIAL_NULL_STRIPPING BIT(3)
#define CP210X_SERIAL_BREAK_CHAR BIT(4)
#define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
#define CP210X_SERIAL_RTS_INACTIVE (0 << 6)
#define CP210X_SERIAL_RTS_ACTIVE (1 << 6)
#define CP210X_SERIAL_RTS_FLOW_CTL (2 << 6)
#define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
/* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */
struct cp210x_pin_mode {
u8 eci;
u8 sci;
};
#define CP210X_PIN_MODE_MODEM 0
#define CP210X_PIN_MODE_GPIO BIT(0)
/*
* CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes
* on a CP2105 chip. Structure needs padding due to unused/unspecified bytes.
*/
struct cp210x_dual_port_config {
__le16 gpio_mode;
u8 __pad0[2];
__le16 reset_state;
u8 __pad1[4];
__le16 suspend_state;
u8 sci_cfg;
u8 eci_cfg;
u8 device_cfg;
} __packed;
/*
* CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xd bytes
* on a CP2104 chip. Structure needs padding due to unused/unspecified bytes.
*/
struct cp210x_single_port_config {
__le16 gpio_mode;
u8 __pad0[2];
__le16 reset_state;
u8 __pad1[4];
__le16 suspend_state;
u8 device_cfg;
} __packed;
/* GPIO modes */
#define CP210X_SCI_GPIO_MODE_OFFSET 9
#define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9)
#define CP210X_ECI_GPIO_MODE_OFFSET 2
#define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2)
#define CP210X_GPIO_MODE_OFFSET 8
#define CP210X_GPIO_MODE_MASK GENMASK(11, 8)
/* CP2105 port configuration values */
#define CP2105_GPIO0_TXLED_MODE BIT(0)
#define CP2105_GPIO1_RXLED_MODE BIT(1)
#define CP2105_GPIO1_RS485_MODE BIT(2)
/* CP2104 port configuration values */
#define CP2104_GPIO0_TXLED_MODE BIT(0)
#define CP2104_GPIO1_RXLED_MODE BIT(1)
#define CP2104_GPIO2_RS485_MODE BIT(2)
/* CP2102N configuration array indices */
#define CP210X_2NCONFIG_CONFIG_VERSION_IDX 2
#define CP210X_2NCONFIG_GPIO_MODE_IDX 581
#define CP210X_2NCONFIG_GPIO_RSTLATCH_IDX 587
#define CP210X_2NCONFIG_GPIO_CONTROL_IDX 600
/* CP2102N QFN20 port configuration values */
#define CP2102N_QFN20_GPIO2_TXLED_MODE BIT(2)
#define CP2102N_QFN20_GPIO3_RXLED_MODE BIT(3)
#define CP2102N_QFN20_GPIO1_RS485_MODE BIT(4)
#define CP2102N_QFN20_GPIO0_CLK_MODE BIT(6)
/* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */
struct cp210x_gpio_write {
u8 mask;
u8 state;
};
/*
* Helper to get interface number when we only have struct usb_serial.
*/
static u8 cp210x_interface_num(struct usb_serial *serial)
{
struct usb_host_interface *cur_altsetting;
cur_altsetting = serial->interface->cur_altsetting;
return cur_altsetting->desc.bInterfaceNumber;
}
/*
* Reads a variable-sized block of CP210X_ registers, identified by req.
* Returns data into buf in native USB byte order.
*/
static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
void *buf, int bufsize)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
void *dmabuf;
int result;
dmabuf = kmalloc(bufsize, GFP_KERNEL);
if (!dmabuf)
return -ENOMEM;
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
req, REQTYPE_INTERFACE_TO_HOST, 0,
port_priv->bInterfaceNumber, dmabuf, bufsize,
USB_CTRL_SET_TIMEOUT);
if (result == bufsize) {
memcpy(buf, dmabuf, bufsize);
result = 0;
} else {
dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",
req, bufsize, result);
if (result >= 0)
result = -EIO;
}
kfree(dmabuf);
return result;
}
/*
* Reads any 8-bit CP210X_ register identified by req.
*/
static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
{
return cp210x_read_reg_block(port, req, val, sizeof(*val));
}
/*
* Reads a variable-sized vendor block of CP210X_ registers, identified by val.
* Returns data into buf in native USB byte order.
*/
static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val,
void *buf, int bufsize)
{
void *dmabuf;
int result;
dmabuf = kmalloc(bufsize, GFP_KERNEL);
if (!dmabuf)
return -ENOMEM;
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
CP210X_VENDOR_SPECIFIC, type, val,
cp210x_interface_num(serial), dmabuf, bufsize,
USB_CTRL_GET_TIMEOUT);
if (result == bufsize) {
memcpy(buf, dmabuf, bufsize);
result = 0;
} else {
dev_err(&serial->interface->dev,
"failed to get vendor val 0x%04x size %d: %d\n", val,
bufsize, result);
if (result >= 0)
result = -EIO;
}
kfree(dmabuf);
return result;
}
/*
* Writes any 16-bit CP210X_ register (req) whose value is passed
* entirely in the wValue field of the USB request.
*/
static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
int result;
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
req, REQTYPE_HOST_TO_INTERFACE, val,
port_priv->bInterfaceNumber, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (result < 0) {
dev_err(&port->dev, "failed set request 0x%x status: %d\n",
req, result);
}
return result;
}
/*
* Writes a variable-sized block of CP210X_ registers, identified by req.
* Data in buf must be in native USB byte order.
*/
static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
void *buf, int bufsize)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
void *dmabuf;
int result;
dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
if (!dmabuf)
return -ENOMEM;
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
req, REQTYPE_HOST_TO_INTERFACE, 0,
port_priv->bInterfaceNumber, dmabuf, bufsize,
USB_CTRL_SET_TIMEOUT);
kfree(dmabuf);
if (result < 0) {
dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",
req, bufsize, result);
return result;
}
return 0;
}
/*
* Writes any 32-bit CP210X_ register identified by req.
*/
static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
{
__le32 le32_val;
le32_val = cpu_to_le32(val);
return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val));
}
#ifdef CONFIG_GPIOLIB
/*
* Writes a variable-sized vendor block of CP210X_ registers, identified by val.
* Data in buf must be in native USB byte order.
*/
static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type,
u16 val, void *buf, int bufsize)
{
void *dmabuf;
int result;
dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
if (!dmabuf)
return -ENOMEM;
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
CP210X_VENDOR_SPECIFIC, type, val,
cp210x_interface_num(serial), dmabuf, bufsize,
USB_CTRL_SET_TIMEOUT);
kfree(dmabuf);
if (result < 0) {
dev_err(&serial->interface->dev,
"failed to set vendor val 0x%04x size %d: %d\n", val,
bufsize, result);
return result;
}
return 0;
}
#endif
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
int result;
result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
if (result) {
dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
return result;
}
if (tty)
cp210x_set_termios(tty, port, NULL);
result = usb_serial_generic_open(tty, port);
if (result)
goto err_disable;
return 0;
err_disable:
cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
port_priv->event_mode = false;
return result;
}
static void cp210x_close(struct usb_serial_port *port)
{
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
usb_serial_generic_close(port);
/* Clear both queues; cp2108 needs this to avoid an occasional hang */
cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
/* Disabling the interface disables event-insertion mode. */
port_priv->event_mode = false;
}
static void cp210x_process_lsr(struct usb_serial_port *port, unsigned char lsr, char *flag)
{
if (lsr & CP210X_LSR_BREAK) {
port->icount.brk++;
*flag = TTY_BREAK;
} else if (lsr & CP210X_LSR_PARITY) {
port->icount.parity++;
*flag = TTY_PARITY;
} else if (lsr & CP210X_LSR_FRAME) {
port->icount.frame++;
*flag = TTY_FRAME;
}
if (lsr & CP210X_LSR_OVERRUN) {
port->icount.overrun++;
tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
}
}
static bool cp210x_process_char(struct usb_serial_port *port, unsigned char *ch, char *flag)
{
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
switch (port_priv->event_state) {
case ES_DATA:
if (*ch == CP210X_ESCCHAR) {
port_priv->event_state = ES_ESCAPE;
break;
}
return false;
case ES_ESCAPE:
switch (*ch) {
case 0:
dev_dbg(&port->dev, "%s - escape char\n", __func__);
*ch = CP210X_ESCCHAR;
port_priv->event_state = ES_DATA;
return false;
case 1:
port_priv->event_state = ES_LSR_DATA_0;
break;
case 2:
port_priv->event_state = ES_LSR;
break;
case 3:
port_priv->event_state = ES_MSR;
break;
default:
dev_err(&port->dev, "malformed event 0x%02x\n", *ch);
port_priv->event_state = ES_DATA;
break;
}
break;
case ES_LSR_DATA_0:
port_priv->lsr = *ch;
port_priv->event_state = ES_LSR_DATA_1;
break;
case ES_LSR_DATA_1:
dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n",
__func__, port_priv->lsr, *ch);
cp210x_process_lsr(port, port_priv->lsr, flag);
port_priv->event_state = ES_DATA;
return false;
case ES_LSR:
dev_dbg(&port->dev, "%s - lsr = 0x%02x\n", __func__, *ch);
port_priv->lsr = *ch;
cp210x_process_lsr(port, port_priv->lsr, flag);
port_priv->event_state = ES_DATA;
break;
case ES_MSR:
dev_dbg(&port->dev, "%s - msr = 0x%02x\n", __func__, *ch);
/* unimplemented */
port_priv->event_state = ES_DATA;
break;
}
return true;
}
static void cp210x_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
unsigned char *ch = urb->transfer_buffer;
char flag;
int i;
if (!urb->actual_length)
return;
if (port_priv->event_mode) {
for (i = 0; i < urb->actual_length; i++, ch++) {
flag = TTY_NORMAL;
if (cp210x_process_char(port, ch, &flag))
continue;
tty_insert_flip_char(&port->port, *ch, flag);
}
} else {
tty_insert_flip_string(&port->port, ch, urb->actual_length);
}
tty_flip_buffer_push(&port->port);
}
/*
* Read how many bytes are waiting in the TX queue.
*/
static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
u32 *count)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
struct cp210x_comm_status *sts;
int result;
sts = kmalloc(sizeof(*sts), GFP_KERNEL);
if (!sts)
return -ENOMEM;
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
0, port_priv->bInterfaceNumber, sts, sizeof(*sts),
USB_CTRL_GET_TIMEOUT);
if (result == sizeof(*sts)) {
*count = le32_to_cpu(sts->ulAmountInOutQueue);
result = 0;
} else {
dev_err(&port->dev, "failed to get comm status: %d\n", result);
if (result >= 0)
result = -EIO;
}
kfree(sts);
return result;
}
static bool cp210x_tx_empty(struct usb_serial_port *port)
{
int err;
u32 count;
err = cp210x_get_tx_queue_byte_count(port, &count);
if (err)
return true;
return !count;
}
struct cp210x_rate {
speed_t rate;
speed_t high;
};
static const struct cp210x_rate cp210x_an205_table1[] = {
{ 300, 300 },
{ 600, 600 },
{ 1200, 1200 },
{ 1800, 1800 },
{ 2400, 2400 },
{ 4000, 4000 },
{ 4800, 4803 },
{ 7200, 7207 },
{ 9600, 9612 },
{ 14400, 14428 },
{ 16000, 16062 },
{ 19200, 19250 },
{ 28800, 28912 },
{ 38400, 38601 },
{ 51200, 51558 },
{ 56000, 56280 },
{ 57600, 58053 },
{ 64000, 64111 },
{ 76800, 77608 },
{ 115200, 117028 },
{ 128000, 129347 },
{ 153600, 156868 },
{ 230400, 237832 },
{ 250000, 254234 },
{ 256000, 273066 },
{ 460800, 491520 },
{ 500000, 567138 },
{ 576000, 670254 },
{ 921600, UINT_MAX }
};
/*
* Quantises the baud rate as per AN205 Table 1
*/
static speed_t cp210x_get_an205_rate(speed_t baud)
{
int i;
for (i = 0; i < ARRAY_SIZE(cp210x_an205_table1); ++i) {
if (baud <= cp210x_an205_table1[i].high)
break;
}
return cp210x_an205_table1[i].rate;
}
static speed_t cp210x_get_actual_rate(speed_t baud)
{
unsigned int prescale = 1;
unsigned int div;
if (baud <= 365)
prescale = 4;
div = DIV_ROUND_CLOSEST(48000000, 2 * prescale * baud);
baud = 48000000 / (2 * prescale * div);
return baud;
}