forked from microsoft/WSL2-Linux-Kernel
-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathicom.c
1677 lines (1389 loc) · 43.6 KB
/
icom.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
/*
* icom.c
*
* Copyright (C) 2001 IBM Corporation. All rights reserved.
*
* Serial device driver.
*
* Based on code from serial.c
*
* 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
*
*/
#define SERIAL_DO_RESTART
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/termios.h>
#include <linux/fs.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/kobject.h>
#include <linux/firmware.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "icom.h"
/*#define ICOM_TRACE enable port trace capabilities */
#define ICOM_DRIVER_NAME "icom"
#define ICOM_VERSION_STR "1.3.1"
#define NR_PORTS 128
#define ICOM_PORT ((struct icom_port *)port)
#define to_icom_adapter(d) container_of(d, struct icom_adapter, kobj)
static const struct pci_device_id icom_pci_table[] = {
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = ADAPTER_V1,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
.driver_data = ADAPTER_V2,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
.driver_data = ADAPTER_V2,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
.driver_data = ADAPTER_V2,
},
{}
};
struct lookup_proc_table start_proc[4] = {
{NULL, ICOM_CONTROL_START_A},
{NULL, ICOM_CONTROL_START_B},
{NULL, ICOM_CONTROL_START_C},
{NULL, ICOM_CONTROL_START_D}
};
struct lookup_proc_table stop_proc[4] = {
{NULL, ICOM_CONTROL_STOP_A},
{NULL, ICOM_CONTROL_STOP_B},
{NULL, ICOM_CONTROL_STOP_C},
{NULL, ICOM_CONTROL_STOP_D}
};
struct lookup_int_table int_mask_tbl[4] = {
{NULL, ICOM_INT_MASK_PRC_A},
{NULL, ICOM_INT_MASK_PRC_B},
{NULL, ICOM_INT_MASK_PRC_C},
{NULL, ICOM_INT_MASK_PRC_D},
};
MODULE_DEVICE_TABLE(pci, icom_pci_table);
static LIST_HEAD(icom_adapter_head);
/* spinlock for adapter initialization and changing adapter operations */
static spinlock_t icom_lock;
#ifdef ICOM_TRACE
static inline void trace(struct icom_port *, char *, unsigned long) {};
#else
static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
#endif
static void free_port_memory(struct icom_port *icom_port)
{
struct pci_dev *dev = icom_port->adapter->pci_dev;
trace(icom_port, "RET_PORT_MEM", 0);
if (icom_port->recv_buf) {
pci_free_consistent(dev, 4096, icom_port->recv_buf,
icom_port->recv_buf_pci);
icom_port->recv_buf = NULL;
}
if (icom_port->xmit_buf) {
pci_free_consistent(dev, 4096, icom_port->xmit_buf,
icom_port->xmit_buf_pci);
icom_port->xmit_buf = NULL;
}
if (icom_port->statStg) {
pci_free_consistent(dev, 4096, icom_port->statStg,
icom_port->statStg_pci);
icom_port->statStg = NULL;
}
if (icom_port->xmitRestart) {
pci_free_consistent(dev, 4096, icom_port->xmitRestart,
icom_port->xmitRestart_pci);
icom_port->xmitRestart = NULL;
}
}
static int __init get_port_memory(struct icom_port *icom_port)
{
int index;
unsigned long stgAddr;
unsigned long startStgAddr;
unsigned long offset;
struct pci_dev *dev = icom_port->adapter->pci_dev;
icom_port->xmit_buf =
pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
if (!icom_port->xmit_buf) {
dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->xmit_buf);
icom_port->recv_buf =
pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
if (!icom_port->recv_buf) {
dev_err(&dev->dev, "Can not allocate Receive buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->recv_buf);
icom_port->statStg =
pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
if (!icom_port->statStg) {
dev_err(&dev->dev, "Can not allocate Status buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->statStg);
icom_port->xmitRestart =
pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
if (!icom_port->xmitRestart) {
dev_err(&dev->dev,
"Can not allocate xmit Restart buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
memset(icom_port->statStg, 0, 4096);
/* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
indicates that frames are to be transmitted
*/
stgAddr = (unsigned long) icom_port->statStg;
for (index = 0; index < NUM_XBUFFS; index++) {
trace(icom_port, "FOD_ADDR", stgAddr);
stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
if (index < (NUM_XBUFFS - 1)) {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
icom_port->statStg->xmit[index].leLengthASD =
(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
trace(icom_port, "FOD_ADDR", stgAddr);
trace(icom_port, "FOD_XBUFF",
(unsigned long) icom_port->xmit_buf);
icom_port->statStg->xmit[index].leBuffer =
cpu_to_le32(icom_port->xmit_buf_pci);
} else if (index == (NUM_XBUFFS - 1)) {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
icom_port->statStg->xmit[index].leLengthASD =
(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
trace(icom_port, "FOD_XBUFF",
(unsigned long) icom_port->xmit_buf);
icom_port->statStg->xmit[index].leBuffer =
cpu_to_le32(icom_port->xmit_buf_pci);
} else {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
}
}
/* FIDs */
startStgAddr = stgAddr;
/* fill in every entry, even if no buffer */
for (index = 0; index < NUM_RBUFFS; index++) {
trace(icom_port, "FID_ADDR", stgAddr);
stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
icom_port->statStg->rcv[index].leLength = 0;
icom_port->statStg->rcv[index].WorkingLength =
(unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
if (index < (NUM_RBUFFS - 1) ) {
offset = stgAddr - (unsigned long) icom_port->statStg;
icom_port->statStg->rcv[index].leNext =
cpu_to_le32(icom_port-> statStg_pci + offset);
trace(icom_port, "FID_RBUFF",
(unsigned long) icom_port->recv_buf);
icom_port->statStg->rcv[index].leBuffer =
cpu_to_le32(icom_port->recv_buf_pci);
} else if (index == (NUM_RBUFFS -1) ) {
offset = startStgAddr - (unsigned long) icom_port->statStg;
icom_port->statStg->rcv[index].leNext =
cpu_to_le32(icom_port-> statStg_pci + offset);
trace(icom_port, "FID_RBUFF",
(unsigned long) icom_port->recv_buf + 2048);
icom_port->statStg->rcv[index].leBuffer =
cpu_to_le32(icom_port->recv_buf_pci + 2048);
} else {
icom_port->statStg->rcv[index].leNext = 0;
icom_port->statStg->rcv[index].leBuffer = 0;
}
}
return 0;
}
static void stop_processor(struct icom_port *icom_port)
{
unsigned long temp;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
stop_proc[port].global_control_reg = &icom_port->global_reg->control;
else
stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
if (port < 4) {
temp = readl(stop_proc[port].global_control_reg);
temp =
(temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
writel(temp, stop_proc[port].global_control_reg);
/* write flush */
readl(stop_proc[port].global_control_reg);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
}
static void start_processor(struct icom_port *icom_port)
{
unsigned long temp;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
start_proc[port].global_control_reg = &icom_port->global_reg->control;
else
start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
if (port < 4) {
temp = readl(start_proc[port].global_control_reg);
temp =
(temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
writel(temp, start_proc[port].global_control_reg);
/* write flush */
readl(start_proc[port].global_control_reg);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
}
static void load_code(struct icom_port *icom_port)
{
const struct firmware *fw;
char __iomem *iram_ptr;
int index;
int status = 0;
void __iomem *dram_ptr = icom_port->dram;
dma_addr_t temp_pci;
unsigned char *new_page = NULL;
unsigned char cable_id = NO_CABLE;
struct pci_dev *dev = icom_port->adapter->pci_dev;
/* Clear out any pending interrupts */
writew(0x3FFF, icom_port->int_reg);
trace(icom_port, "CLEAR_INTERRUPTS", 0);
/* Stop processor */
stop_processor(icom_port);
/* Zero out DRAM */
memset_io(dram_ptr, 0, 512);
/* Load Call Setup into Adapter */
if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_DCE_IRAM_OFFSET) {
dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
for (index = 0; index < fw->size; index++)
writeb(fw->data[index], &iram_ptr[index]);
release_firmware(fw);
/* Load Resident DCE portion of Adapter */
if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_IRAM_SIZE) {
dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
writeb(fw->data[index], &iram_ptr[index]);
release_firmware(fw);
/* Set Hardware level */
if ((icom_port->adapter->version | ADAPTER_V2) == ADAPTER_V2)
writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
/* Start the processor in Adapter */
start_processor(icom_port);
writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
&(icom_port->dram->HDLCConfigReg));
writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
writeb(0x00, &(icom_port->dram->CmdReg));
writeb(0x10, &(icom_port->dram->async_config3));
writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
/*Set up data in icom DRAM to indicate where personality
*code is located and its length.
*/
new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
if (!new_page) {
dev_err(&dev->dev, "Can not allocate DMA buffer\n");
status = -1;
goto load_code_exit;
}
if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_DCE_IRAM_OFFSET) {
dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
for (index = 0; index < fw->size; index++)
new_page[index] = fw->data[index];
release_firmware(fw);
writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
writel(temp_pci, &icom_port->dram->mac_load_addr);
/*Setting the syncReg to 0x80 causes adapter to start downloading
the personality code into adapter instruction RAM.
Once code is loaded, it will begin executing and, based on
information provided above, will start DMAing data from
shared memory to adapter DRAM.
*/
/* the wait loop below verifies this write operation has been done
and processed
*/
writeb(START_DOWNLOAD, &icom_port->dram->sync);
/* Wait max 1 Sec for data download and processor to start */
for (index = 0; index < 10; index++) {
msleep(100);
if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE)
break;
}
if (index == 10)
status = -1;
/*
* check Cable ID
*/
cable_id = readb(&icom_port->dram->cable_id);
if (cable_id & ICOM_CABLE_ID_VALID) {
/* Get cable ID into the lower 4 bits (standard form) */
cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4;
icom_port->cable_id = cable_id;
} else {
dev_err(&dev->dev,"Invalid or no cable attached\n");
icom_port->cable_id = NO_CABLE;
}
load_code_exit:
if (status != 0) {
/* Clear out any pending interrupts */
writew(0x3FFF, icom_port->int_reg);
/* Turn off port */
writeb(ICOM_DISABLE, &(icom_port->dram->disable));
/* Stop processor */
stop_processor(icom_port);
dev_err(&icom_port->adapter->pci_dev->dev,"Port not opertional\n");
}
if (new_page != NULL)
pci_free_consistent(dev, 4096, new_page, temp_pci);
}
static int startup(struct icom_port *icom_port)
{
unsigned long temp;
unsigned char cable_id, raw_cable_id;
unsigned long flags;
int port;
trace(icom_port, "STARTUP", 0);
if (!icom_port->dram) {
/* should NEVER be NULL */
dev_err(&icom_port->adapter->pci_dev->dev,
"Unusable Port, port configuration missing\n");
return -ENODEV;
}
/*
* check Cable ID
*/
raw_cable_id = readb(&icom_port->dram->cable_id);
trace(icom_port, "CABLE_ID", raw_cable_id);
/* Get cable ID into the lower 4 bits (standard form) */
cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
/* Check for valid Cable ID */
if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
(cable_id != icom_port->cable_id)) {
/* reload adapter code, pick up any potential changes in cable id */
load_code(icom_port);
/* still no sign of cable, error out */
raw_cable_id = readb(&icom_port->dram->cable_id);
cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
(icom_port->cable_id == NO_CABLE))
return -EIO;
}
/*
* Finally, clear and enable interrupts
*/
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
else
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
if (port == 0 || port == 2)
writew(0x00FF, icom_port->int_reg);
else
writew(0x3F00, icom_port->int_reg);
if (port < 4) {
temp = readl(int_mask_tbl[port].global_int_mask);
writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
/* write flush */
readl(int_mask_tbl[port].global_int_mask);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
return 0;
}
static void shutdown(struct icom_port *icom_port)
{
unsigned long temp;
unsigned char cmdReg;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
trace(icom_port, "SHUTDOWN", 0);
/*
* disable all interrupts
*/
port = icom_port->port;
if (port == 0 || port == 1)
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
else
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
if (port < 4) {
temp = readl(int_mask_tbl[port].global_int_mask);
writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
/* write flush */
readl(int_mask_tbl[port].global_int_mask);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
/*
* disable break condition
*/
cmdReg = readb(&icom_port->dram->CmdReg);
if ((cmdReg | CMD_SND_BREAK) == CMD_SND_BREAK) {
writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
}
}
static int icom_write(struct uart_port *port)
{
unsigned long data_count;
unsigned char cmdReg;
unsigned long offset;
int temp_tail = port->info->xmit.tail;
trace(ICOM_PORT, "WRITE", 0);
if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
SA_FLAGS_READY_TO_XMIT) {
trace(ICOM_PORT, "WRITE_FULL", 0);
return 0;
}
data_count = 0;
while ((port->info->xmit.head != temp_tail) &&
(data_count <= XMIT_BUFF_SZ)) {
ICOM_PORT->xmit_buf[data_count++] =
port->info->xmit.buf[temp_tail];
temp_tail++;
temp_tail &= (UART_XMIT_SIZE - 1);
}
if (data_count) {
ICOM_PORT->statStg->xmit[0].flags =
cpu_to_le16(SA_FLAGS_READY_TO_XMIT);
ICOM_PORT->statStg->xmit[0].leLength =
cpu_to_le16(data_count);
offset =
(unsigned long) &ICOM_PORT->statStg->xmit[0] -
(unsigned long) ICOM_PORT->statStg;
*ICOM_PORT->xmitRestart =
cpu_to_le32(ICOM_PORT->statStg_pci + offset);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
writeb(cmdReg | CMD_XMIT_RCV_ENABLE,
&ICOM_PORT->dram->CmdReg);
writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd);
trace(ICOM_PORT, "WRITE_START", data_count);
/* write flush */
readb(&ICOM_PORT->dram->StartXmitCmd);
}
return data_count;
}
static inline void check_modem_status(struct icom_port *icom_port)
{
static char old_status = 0;
char delta_status;
unsigned char status;
spin_lock(&icom_port->uart_port.lock);
/*modem input register */
status = readb(&icom_port->dram->isr);
trace(icom_port, "CHECK_MODEM", status);
delta_status = status ^ old_status;
if (delta_status) {
if (delta_status & ICOM_RI)
icom_port->uart_port.icount.rng++;
if (delta_status & ICOM_DSR)
icom_port->uart_port.icount.dsr++;
if (delta_status & ICOM_DCD)
uart_handle_dcd_change(&icom_port->uart_port,
delta_status & ICOM_DCD);
if (delta_status & ICOM_CTS)
uart_handle_cts_change(&icom_port->uart_port,
delta_status & ICOM_CTS);
wake_up_interruptible(&icom_port->uart_port.info->
delta_msr_wait);
old_status = status;
}
spin_unlock(&icom_port->uart_port.lock);
}
static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
{
unsigned short int count;
int i;
if (port_int_reg & (INT_XMIT_COMPLETED)) {
trace(icom_port, "XMIT_COMPLETE", 0);
/* clear buffer in use bit */
icom_port->statStg->xmit[0].flags &=
cpu_to_le16(~SA_FLAGS_READY_TO_XMIT);
count = (unsigned short int)
cpu_to_le16(icom_port->statStg->xmit[0].leLength);
icom_port->uart_port.icount.tx += count;
for (i=0; i<count &&
!uart_circ_empty(&icom_port->uart_port.info->xmit); i++) {
icom_port->uart_port.info->xmit.tail++;
icom_port->uart_port.info->xmit.tail &=
(UART_XMIT_SIZE - 1);
}
if (!icom_write(&icom_port->uart_port))
/* activate write queue */
uart_write_wakeup(&icom_port->uart_port);
} else
trace(icom_port, "XMIT_DISABLED", 0);
}
static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port)
{
short int count, rcv_buff;
struct tty_struct *tty = icom_port->uart_port.info->tty;
unsigned short int status;
struct uart_icount *icount;
unsigned long offset;
unsigned char flag;
trace(icom_port, "RCV_COMPLETE", 0);
rcv_buff = icom_port->next_rcv;
status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
while (status & SA_FL_RCV_DONE) {
int first = -1;
trace(icom_port, "FID_STATUS", status);
count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength);
count = tty_buffer_request_room(tty, count);
trace(icom_port, "RCV_COUNT", count);
trace(icom_port, "REAL_COUNT", count);
offset =
cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
icom_port->recv_buf_pci;
/* Block copy all but the last byte as this may have status */
if (count > 0) {
first = icom_port->recv_buf[offset];
tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1);
}
icount = &icom_port->uart_port.icount;
icount->rx += count;
/* Break detect logic */
if ((status & SA_FLAGS_FRAME_ERROR)
&& first == 0) {
status &= ~SA_FLAGS_FRAME_ERROR;
status |= SA_FLAGS_BREAK_DET;
trace(icom_port, "BREAK_DET", 0);
}
flag = TTY_NORMAL;
if (status &
(SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
if (status & SA_FLAGS_BREAK_DET)
icount->brk++;
if (status & SA_FLAGS_PARITY_ERROR)
icount->parity++;
if (status & SA_FLAGS_FRAME_ERROR)
icount->frame++;
if (status & SA_FLAGS_OVERRUN)
icount->overrun++;
/*
* Now check to see if character should be
* ignored, and mask off conditions which
* should be ignored.
*/
if (status & icom_port->ignore_status_mask) {
trace(icom_port, "IGNORE_CHAR", 0);
goto ignore_char;
}
status &= icom_port->read_status_mask;
if (status & SA_FLAGS_BREAK_DET) {
flag = TTY_BREAK;
} else if (status & SA_FLAGS_PARITY_ERROR) {
trace(icom_port, "PARITY_ERROR", 0);
flag = TTY_PARITY;
} else if (status & SA_FLAGS_FRAME_ERROR)
flag = TTY_FRAME;
}
tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag);
if (status & SA_FLAGS_OVERRUN)
/*
* Overrun is special, since it's
* reported immediately, and doesn't
* affect the current character
*/
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
ignore_char:
icom_port->statStg->rcv[rcv_buff].flags = 0;
icom_port->statStg->rcv[rcv_buff].leLength = 0;
icom_port->statStg->rcv[rcv_buff].WorkingLength =
(unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
rcv_buff++;
if (rcv_buff == NUM_RBUFFS)
rcv_buff = 0;
status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
}
icom_port->next_rcv = rcv_buff;
tty_flip_buffer_push(tty);
}
static void process_interrupt(u16 port_int_reg,
struct icom_port *icom_port)
{
spin_lock(&icom_port->uart_port.lock);
trace(icom_port, "INTERRUPT", port_int_reg);
if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
xmit_interrupt(port_int_reg, icom_port);
if (port_int_reg & INT_RCV_COMPLETED)
recv_interrupt(port_int_reg, icom_port);
spin_unlock(&icom_port->uart_port.lock);
}
static irqreturn_t icom_interrupt(int irq, void *dev_id,
struct pt_regs *regs)
{
void __iomem * int_reg;
u32 adapter_interrupts;
u16 port_int_reg;
struct icom_adapter *icom_adapter;
struct icom_port *icom_port;
/* find icom_port for this interrupt */
icom_adapter = (struct icom_adapter *) dev_id;
if ((icom_adapter->version | ADAPTER_V2) == ADAPTER_V2) {
int_reg = icom_adapter->base_addr + 0x8024;
adapter_interrupts = readl(int_reg);
if (adapter_interrupts & 0x00003FFF) {
/* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
icom_port = &icom_adapter->port_info[2];
port_int_reg = (u16) adapter_interrupts;
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
if (adapter_interrupts & 0x3FFF0000) {
/* port 3 interrupt */
icom_port = &icom_adapter->port_info[3];
if (icom_port->status == ICOM_PORT_ACTIVE) {
port_int_reg =
(u16) (adapter_interrupts >> 16);
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
}
/* Clear out any pending interrupts */
writel(adapter_interrupts, int_reg);
int_reg = icom_adapter->base_addr + 0x8004;
} else {
int_reg = icom_adapter->base_addr + 0x4004;
}
adapter_interrupts = readl(int_reg);
if (adapter_interrupts & 0x00003FFF) {
/* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
icom_port = &icom_adapter->port_info[0];
port_int_reg = (u16) adapter_interrupts;
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
if (adapter_interrupts & 0x3FFF0000) {
/* port 1 interrupt */
icom_port = &icom_adapter->port_info[1];
if (icom_port->status == ICOM_PORT_ACTIVE) {
port_int_reg = (u16) (adapter_interrupts >> 16);
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
}
/* Clear out any pending interrupts */
writel(adapter_interrupts, int_reg);
/* flush the write */
adapter_interrupts = readl(int_reg);
return IRQ_HANDLED;
}
/*
* ------------------------------------------------------------------
* Begin serial-core API
* ------------------------------------------------------------------
*/
static unsigned int icom_tx_empty(struct uart_port *port)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
SA_FLAGS_READY_TO_XMIT)
ret = TIOCSER_TEMT;
else
ret = 0;
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
unsigned char local_osr;
trace(ICOM_PORT, "SET_MODEM", 0);
local_osr = readb(&ICOM_PORT->dram->osr);
if (mctrl & TIOCM_RTS) {
trace(ICOM_PORT, "RAISE_RTS", 0);
local_osr |= ICOM_RTS;
} else {
trace(ICOM_PORT, "LOWER_RTS", 0);
local_osr &= ~ICOM_RTS;
}
if (mctrl & TIOCM_DTR) {
trace(ICOM_PORT, "RAISE_DTR", 0);
local_osr |= ICOM_DTR;
} else {
trace(ICOM_PORT, "LOWER_DTR", 0);
local_osr &= ~ICOM_DTR;
}
writeb(local_osr, &ICOM_PORT->dram->osr);
}
static unsigned int icom_get_mctrl(struct uart_port *port)
{
unsigned char status;
unsigned int result;
trace(ICOM_PORT, "GET_MODEM", 0);
status = readb(&ICOM_PORT->dram->isr);
result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
| ((status & ICOM_RI) ? TIOCM_RNG : 0)
| ((status & ICOM_DSR) ? TIOCM_DSR : 0)
| ((status & ICOM_CTS) ? TIOCM_CTS : 0);
return result;
}
static void icom_stop_tx(struct uart_port *port)
{
unsigned char cmdReg;
trace(ICOM_PORT, "STOP", 0);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
}
static void icom_start_tx(struct uart_port *port)
{
unsigned char cmdReg;
trace(ICOM_PORT, "START", 0);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
writeb(cmdReg & ~CMD_HOLD_XMIT,
&ICOM_PORT->dram->CmdReg);
icom_write(port);