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12#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/kdev_t.h>
15#include <linux/tty.h>
16#include <linux/tty_flip.h>
17#include <linux/vt_kern.h>
18#include <linux/init.h>
19#include <linux/console.h>
20#include <linux/interrupt.h>
21#include <linux/err.h>
22#include <linux/reboot.h>
23#include <linux/slab.h>
24#include <asm/ccwdev.h>
25#include <asm/cio.h>
26#include <asm/io.h>
27#include <asm/ebcdic.h>
28#include <asm/uaccess.h>
29#include <asm/delay.h>
30#include <asm/cpcmd.h>
31#include <asm/setup.h>
32
33#include "ctrlchar.h"
34
35#define NR_3215 1
36#define NR_3215_REQ (4*NR_3215)
37#define RAW3215_BUFFER_SIZE 65536
38#define RAW3215_INBUF_SIZE 256
39#define RAW3215_MIN_SPACE 128
40#define RAW3215_MIN_WRITE 1024
41#define RAW3215_MAX_BYTES 3968
42#define RAW3215_MAX_NEWLINE 50
43#define RAW3215_NR_CCWS 3
44#define RAW3215_TIMEOUT HZ/10
45
46#define RAW3215_FIXED 1
47#define RAW3215_ACTIVE 2
48#define RAW3215_WORKING 4
49#define RAW3215_THROTTLED 8
50#define RAW3215_STOPPED 16
51#define RAW3215_CLOSING 32
52#define RAW3215_TIMER_RUNS 64
53#define RAW3215_FLUSHING 128
54#define RAW3215_FROZEN 256
55
56#define TAB_STOP_SIZE 8
57
58
59
60
61enum raw3215_type {
62 RAW3215_FREE, RAW3215_READ, RAW3215_WRITE
63};
64
65
66
67
68struct raw3215_req {
69 enum raw3215_type type;
70 int start, len;
71 int delayable;
72 int residual;
73 struct ccw1 ccws[RAW3215_NR_CCWS];
74 struct raw3215_info *info;
75 struct raw3215_req *next;
76} __attribute__ ((aligned(8)));
77
78struct raw3215_info {
79 struct ccw_device *cdev;
80 spinlock_t *lock;
81 int flags;
82 char *buffer;
83 char *inbuf;
84 int head;
85 int count;
86 int written;
87 struct tty_struct *tty;
88 struct raw3215_req *queued_read;
89 struct raw3215_req *queued_write;
90 wait_queue_head_t empty_wait;
91 struct timer_list timer;
92 int line_pos;
93 char ubuffer[80];
94};
95
96
97static struct raw3215_info *raw3215[NR_3215];
98
99static DEFINE_SPINLOCK(raw3215_device_lock);
100
101static struct raw3215_req *raw3215_freelist;
102
103static spinlock_t raw3215_freelist_lock;
104
105static struct tty_driver *tty3215_driver;
106
107
108
109
110static inline struct raw3215_req *raw3215_alloc_req(void)
111{
112 struct raw3215_req *req;
113 unsigned long flags;
114
115 spin_lock_irqsave(&raw3215_freelist_lock, flags);
116 req = raw3215_freelist;
117 raw3215_freelist = req->next;
118 spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
119 return req;
120}
121
122
123
124
125static inline void raw3215_free_req(struct raw3215_req *req)
126{
127 unsigned long flags;
128
129 if (req->type == RAW3215_FREE)
130 return;
131 req->type = RAW3215_FREE;
132 spin_lock_irqsave(&raw3215_freelist_lock, flags);
133 req->next = raw3215_freelist;
134 raw3215_freelist = req;
135 spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
136}
137
138
139
140
141
142
143
144static void raw3215_mk_read_req(struct raw3215_info *raw)
145{
146 struct raw3215_req *req;
147 struct ccw1 *ccw;
148
149
150 req = raw->queued_read;
151 if (req == NULL) {
152
153 req = raw3215_alloc_req();
154 req->type = RAW3215_READ;
155 req->info = raw;
156 raw->queued_read = req;
157 }
158
159 ccw = req->ccws;
160 ccw->cmd_code = 0x0A;
161 ccw->flags = 0x20;
162 ccw->count = 160;
163 ccw->cda = (__u32) __pa(raw->inbuf);
164}
165
166
167
168
169
170
171
172static void raw3215_mk_write_req(struct raw3215_info *raw)
173{
174 struct raw3215_req *req;
175 struct ccw1 *ccw;
176 int len, count, ix, lines;
177
178 if (raw->count <= raw->written)
179 return;
180
181 req = raw->queued_write;
182 if (req == NULL) {
183
184 req = raw3215_alloc_req();
185 req->type = RAW3215_WRITE;
186 req->info = raw;
187 raw->queued_write = req;
188 } else {
189 raw->written -= req->len;
190 }
191
192 ccw = req->ccws;
193 req->start = (raw->head - raw->count + raw->written) &
194 (RAW3215_BUFFER_SIZE - 1);
195
196
197
198
199
200 lines = 0;
201 ix = req->start;
202 while (lines < RAW3215_MAX_NEWLINE && ix != raw->head) {
203 if (raw->buffer[ix] == 0x15)
204 lines++;
205 ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
206 }
207 len = ((ix - 1 - req->start) & (RAW3215_BUFFER_SIZE - 1)) + 1;
208 if (len > RAW3215_MAX_BYTES)
209 len = RAW3215_MAX_BYTES;
210 req->len = len;
211 raw->written += len;
212
213
214 req->delayable = (ix == raw->head) && (len < RAW3215_MIN_WRITE);
215
216 ix = req->start;
217 while (len > 0) {
218 if (ccw > req->ccws)
219 ccw[-1].flags |= 0x40;
220 ccw->cmd_code = 0x01;
221 ccw->flags = 0x20;
222 ccw->cda =
223 (__u32) __pa(raw->buffer + ix);
224 count = len;
225 if (ix + count > RAW3215_BUFFER_SIZE)
226 count = RAW3215_BUFFER_SIZE - ix;
227 ccw->count = count;
228 len -= count;
229 ix = (ix + count) & (RAW3215_BUFFER_SIZE - 1);
230 ccw++;
231 }
232
233
234
235
236
237 if (ccw > req->ccws)
238 ccw[-1].flags |= 0x40;
239 ccw->cmd_code = 0x03;
240 ccw->flags = 0;
241 ccw->cda = 0;
242 ccw->count = 1;
243}
244
245
246
247
248static void raw3215_start_io(struct raw3215_info *raw)
249{
250 struct raw3215_req *req;
251 int res;
252
253 req = raw->queued_read;
254 if (req != NULL &&
255 !(raw->flags & (RAW3215_WORKING | RAW3215_THROTTLED))) {
256
257 raw->queued_read = NULL;
258 res = ccw_device_start(raw->cdev, req->ccws,
259 (unsigned long) req, 0, 0);
260 if (res != 0) {
261
262 raw->queued_read = req;
263 } else {
264 raw->flags |= RAW3215_WORKING;
265 }
266 }
267 req = raw->queued_write;
268 if (req != NULL &&
269 !(raw->flags & (RAW3215_WORKING | RAW3215_STOPPED))) {
270
271 raw->queued_write = NULL;
272 res = ccw_device_start(raw->cdev, req->ccws,
273 (unsigned long) req, 0, 0);
274 if (res != 0) {
275
276 raw->queued_write = req;
277 } else {
278 raw->flags |= RAW3215_WORKING;
279 }
280 }
281}
282
283
284
285
286static void raw3215_timeout(unsigned long __data)
287{
288 struct raw3215_info *raw = (struct raw3215_info *) __data;
289 unsigned long flags;
290
291 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
292 if (raw->flags & RAW3215_TIMER_RUNS) {
293 del_timer(&raw->timer);
294 raw->flags &= ~RAW3215_TIMER_RUNS;
295 if (!(raw->flags & RAW3215_FROZEN)) {
296 raw3215_mk_write_req(raw);
297 raw3215_start_io(raw);
298 }
299 }
300 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
301}
302
303
304
305
306
307
308
309static inline void raw3215_try_io(struct raw3215_info *raw)
310{
311 if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FROZEN))
312 return;
313 if (raw->queued_read != NULL)
314 raw3215_start_io(raw);
315 else if (raw->queued_write != NULL) {
316 if ((raw->queued_write->delayable == 0) ||
317 (raw->flags & RAW3215_FLUSHING)) {
318
319 raw3215_start_io(raw);
320 if (raw->flags & RAW3215_TIMER_RUNS) {
321 del_timer(&raw->timer);
322 raw->flags &= ~RAW3215_TIMER_RUNS;
323 }
324 } else if (!(raw->flags & RAW3215_TIMER_RUNS)) {
325
326 init_timer(&raw->timer);
327 raw->timer.expires = RAW3215_TIMEOUT + jiffies;
328 raw->timer.data = (unsigned long) raw;
329 raw->timer.function = raw3215_timeout;
330 add_timer(&raw->timer);
331 raw->flags |= RAW3215_TIMER_RUNS;
332 }
333 }
334}
335
336
337
338
339static void raw3215_next_io(struct raw3215_info *raw)
340{
341 struct tty_struct *tty;
342
343 raw3215_mk_write_req(raw);
344 raw3215_try_io(raw);
345 tty = raw->tty;
346 if (tty != NULL &&
347 RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) {
348 tty_wakeup(tty);
349 }
350}
351
352
353
354
355static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
356 struct irb *irb)
357{
358 struct raw3215_info *raw;
359 struct raw3215_req *req;
360 struct tty_struct *tty;
361 int cstat, dstat;
362 int count;
363
364 raw = dev_get_drvdata(&cdev->dev);
365 req = (struct raw3215_req *) intparm;
366 cstat = irb->scsw.cmd.cstat;
367 dstat = irb->scsw.cmd.dstat;
368 if (cstat != 0)
369 raw3215_next_io(raw);
370 if (dstat & 0x01) {
371 dstat &= ~0x01;
372 }
373 switch (dstat) {
374 case 0x80:
375 if (cstat != 0)
376 break;
377
378 raw3215_mk_read_req(raw);
379 raw3215_next_io(raw);
380 break;
381 case 0x08:
382 case 0x0C:
383
384 if ((raw = req->info) == NULL)
385 return;
386 if (req->type == RAW3215_READ) {
387
388 req->residual = irb->scsw.cmd.count;
389 }
390 if (dstat == 0x08)
391 break;
392 case 0x04:
393
394 if ((raw = req->info) == NULL)
395 return;
396 if (req->type == RAW3215_READ && raw->tty != NULL) {
397 unsigned int cchar;
398
399 tty = raw->tty;
400 count = 160 - req->residual;
401 EBCASC(raw->inbuf, count);
402 cchar = ctrlchar_handle(raw->inbuf, count, tty);
403 switch (cchar & CTRLCHAR_MASK) {
404 case CTRLCHAR_SYSRQ:
405 break;
406
407 case CTRLCHAR_CTRL:
408 tty_insert_flip_char(tty, cchar, TTY_NORMAL);
409 tty_flip_buffer_push(raw->tty);
410 break;
411
412 case CTRLCHAR_NONE:
413 if (count < 2 ||
414 (strncmp(raw->inbuf+count-2, "\252n", 2) &&
415 strncmp(raw->inbuf+count-2, "^n", 2)) ) {
416
417 raw->inbuf[count] = '\n';
418 count++;
419 } else
420 count -= 2;
421 tty_insert_flip_string(tty, raw->inbuf, count);
422 tty_flip_buffer_push(raw->tty);
423 break;
424 }
425 } else if (req->type == RAW3215_WRITE) {
426 raw->count -= req->len;
427 raw->written -= req->len;
428 }
429 raw->flags &= ~RAW3215_WORKING;
430 raw3215_free_req(req);
431
432 if (waitqueue_active(&raw->empty_wait) &&
433 raw->queued_write == NULL &&
434 raw->queued_read == NULL) {
435 wake_up_interruptible(&raw->empty_wait);
436 }
437 raw3215_next_io(raw);
438 break;
439 default:
440
441 if (req != NULL && req->type != RAW3215_FREE) {
442 if (req->type == RAW3215_WRITE) {
443 raw->count -= req->len;
444 raw->written -= req->len;
445 }
446 raw->flags &= ~RAW3215_WORKING;
447 raw3215_free_req(req);
448 }
449 raw3215_next_io(raw);
450 }
451 return;
452}
453
454
455
456
457static void raw3215_drop_line(struct raw3215_info *raw)
458{
459 int ix;
460 char ch;
461
462 BUG_ON(raw->written != 0);
463 ix = (raw->head - raw->count) & (RAW3215_BUFFER_SIZE - 1);
464 while (raw->count > 0) {
465 ch = raw->buffer[ix];
466 ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
467 raw->count--;
468 if (ch == 0x15)
469 break;
470 }
471 raw->head = ix;
472}
473
474
475
476
477
478
479static void raw3215_make_room(struct raw3215_info *raw, unsigned int length)
480{
481 while (RAW3215_BUFFER_SIZE - raw->count < length) {
482
483
484
485 if (raw->flags & RAW3215_FROZEN) {
486 raw3215_drop_line(raw);
487 continue;
488 }
489
490 raw->flags |= RAW3215_FLUSHING;
491 raw3215_mk_write_req(raw);
492 raw3215_try_io(raw);
493 raw->flags &= ~RAW3215_FLUSHING;
494#ifdef CONFIG_TN3215_CONSOLE
495 wait_cons_dev();
496#endif
497
498 if (RAW3215_BUFFER_SIZE - raw->count >= length)
499 break;
500
501 spin_unlock(get_ccwdev_lock(raw->cdev));
502 udelay(100);
503 spin_lock(get_ccwdev_lock(raw->cdev));
504 }
505}
506
507
508
509
510static void raw3215_write(struct raw3215_info *raw, const char *str,
511 unsigned int length)
512{
513 unsigned long flags;
514 int c, count;
515
516 while (length > 0) {
517 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
518 count = (length > RAW3215_BUFFER_SIZE) ?
519 RAW3215_BUFFER_SIZE : length;
520 length -= count;
521
522 raw3215_make_room(raw, count);
523
524
525 while (1) {
526 c = min_t(int, count,
527 min(RAW3215_BUFFER_SIZE - raw->count,
528 RAW3215_BUFFER_SIZE - raw->head));
529 if (c <= 0)
530 break;
531 memcpy(raw->buffer + raw->head, str, c);
532 ASCEBC(raw->buffer + raw->head, c);
533 raw->head = (raw->head + c) & (RAW3215_BUFFER_SIZE - 1);
534 raw->count += c;
535 raw->line_pos += c;
536 str += c;
537 count -= c;
538 }
539 if (!(raw->flags & RAW3215_WORKING)) {
540 raw3215_mk_write_req(raw);
541
542 raw3215_try_io(raw);
543 }
544 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
545 }
546}
547
548
549
550
551static void raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
552{
553 unsigned long flags;
554 unsigned int length, i;
555
556 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
557 if (ch == '\t') {
558 length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE);
559 raw->line_pos += length;
560 ch = ' ';
561 } else if (ch == '\n') {
562 length = 1;
563 raw->line_pos = 0;
564 } else {
565 length = 1;
566 raw->line_pos++;
567 }
568 raw3215_make_room(raw, length);
569
570 for (i = 0; i < length; i++) {
571 raw->buffer[raw->head] = (char) _ascebc[(int) ch];
572 raw->head = (raw->head + 1) & (RAW3215_BUFFER_SIZE - 1);
573 raw->count++;
574 }
575 if (!(raw->flags & RAW3215_WORKING)) {
576 raw3215_mk_write_req(raw);
577
578 raw3215_try_io(raw);
579 }
580 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
581}
582
583
584
585
586
587static void raw3215_flush_buffer(struct raw3215_info *raw)
588{
589 unsigned long flags;
590
591 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
592 if (raw->count > 0) {
593 raw->flags |= RAW3215_FLUSHING;
594 raw3215_try_io(raw);
595 raw->flags &= ~RAW3215_FLUSHING;
596 }
597 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
598}
599
600
601
602
603static int raw3215_startup(struct raw3215_info *raw)
604{
605 unsigned long flags;
606
607 if (raw->flags & RAW3215_ACTIVE)
608 return 0;
609 raw->line_pos = 0;
610 raw->flags |= RAW3215_ACTIVE;
611 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
612 raw3215_try_io(raw);
613 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
614
615 return 0;
616}
617
618
619
620
621static void raw3215_shutdown(struct raw3215_info *raw)
622{
623 DECLARE_WAITQUEUE(wait, current);
624 unsigned long flags;
625
626 if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FIXED))
627 return;
628
629 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
630 if ((raw->flags & RAW3215_WORKING) ||
631 raw->queued_write != NULL ||
632 raw->queued_read != NULL) {
633 raw->flags |= RAW3215_CLOSING;
634 add_wait_queue(&raw->empty_wait, &wait);
635 set_current_state(TASK_INTERRUPTIBLE);
636 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
637 schedule();
638 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
639 remove_wait_queue(&raw->empty_wait, &wait);
640 set_current_state(TASK_RUNNING);
641 raw->flags &= ~(RAW3215_ACTIVE | RAW3215_CLOSING);
642 }
643 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
644}
645
646static int raw3215_probe (struct ccw_device *cdev)
647{
648 struct raw3215_info *raw;
649 int line;
650
651
652 if (raw3215[0] && (raw3215[0] == dev_get_drvdata(&cdev->dev)))
653 return 0;
654 raw = kmalloc(sizeof(struct raw3215_info) +
655 RAW3215_INBUF_SIZE, GFP_KERNEL|GFP_DMA);
656 if (raw == NULL)
657 return -ENOMEM;
658
659 spin_lock(&raw3215_device_lock);
660 for (line = 0; line < NR_3215; line++) {
661 if (!raw3215[line]) {
662 raw3215[line] = raw;
663 break;
664 }
665 }
666 spin_unlock(&raw3215_device_lock);
667 if (line == NR_3215) {
668 kfree(raw);
669 return -ENODEV;
670 }
671
672 raw->cdev = cdev;
673 raw->inbuf = (char *) raw + sizeof(struct raw3215_info);
674 memset(raw, 0, sizeof(struct raw3215_info));
675 raw->buffer = kmalloc(RAW3215_BUFFER_SIZE,
676 GFP_KERNEL|GFP_DMA);
677 if (raw->buffer == NULL) {
678 spin_lock(&raw3215_device_lock);
679 raw3215[line] = NULL;
680 spin_unlock(&raw3215_device_lock);
681 kfree(raw);
682 return -ENOMEM;
683 }
684 init_waitqueue_head(&raw->empty_wait);
685
686 dev_set_drvdata(&cdev->dev, raw);
687 cdev->handler = raw3215_irq;
688
689 return 0;
690}
691
692static void raw3215_remove (struct ccw_device *cdev)
693{
694 struct raw3215_info *raw;
695
696 ccw_device_set_offline(cdev);
697 raw = dev_get_drvdata(&cdev->dev);
698 if (raw) {
699 dev_set_drvdata(&cdev->dev, NULL);
700 kfree(raw->buffer);
701 kfree(raw);
702 }
703}
704
705static int raw3215_set_online (struct ccw_device *cdev)
706{
707 struct raw3215_info *raw;
708
709 raw = dev_get_drvdata(&cdev->dev);
710 if (!raw)
711 return -ENODEV;
712
713 return raw3215_startup(raw);
714}
715
716static int raw3215_set_offline (struct ccw_device *cdev)
717{
718 struct raw3215_info *raw;
719
720 raw = dev_get_drvdata(&cdev->dev);
721 if (!raw)
722 return -ENODEV;
723
724 raw3215_shutdown(raw);
725
726 return 0;
727}
728
729static int raw3215_pm_stop(struct ccw_device *cdev)
730{
731 struct raw3215_info *raw;
732 unsigned long flags;
733
734
735 raw = dev_get_drvdata(&cdev->dev);
736 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
737 raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
738 raw->flags |= RAW3215_FROZEN;
739 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
740 return 0;
741}
742
743static int raw3215_pm_start(struct ccw_device *cdev)
744{
745 struct raw3215_info *raw;
746 unsigned long flags;
747
748
749 raw = dev_get_drvdata(&cdev->dev);
750 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
751 raw->flags &= ~RAW3215_FROZEN;
752 raw->flags |= RAW3215_FLUSHING;
753 raw3215_try_io(raw);
754 raw->flags &= ~RAW3215_FLUSHING;
755 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
756 return 0;
757}
758
759static struct ccw_device_id raw3215_id[] = {
760 { CCW_DEVICE(0x3215, 0) },
761 { },
762};
763
764static struct ccw_driver raw3215_ccw_driver = {
765 .name = "3215",
766 .owner = THIS_MODULE,
767 .ids = raw3215_id,
768 .probe = &raw3215_probe,
769 .remove = &raw3215_remove,
770 .set_online = &raw3215_set_online,
771 .set_offline = &raw3215_set_offline,
772 .freeze = &raw3215_pm_stop,
773 .thaw = &raw3215_pm_start,
774 .restore = &raw3215_pm_start,
775};
776
777#ifdef CONFIG_TN3215_CONSOLE
778
779
780
781static void con3215_write(struct console *co, const char *str,
782 unsigned int count)
783{
784 struct raw3215_info *raw;
785 int i;
786
787 if (count <= 0)
788 return;
789 raw = raw3215[0];
790 while (count > 0) {
791 for (i = 0; i < count; i++)
792 if (str[i] == '\t' || str[i] == '\n')
793 break;
794 raw3215_write(raw, str, i);
795 count -= i;
796 str += i;
797 if (count > 0) {
798 raw3215_putchar(raw, *str);
799 count--;
800 str++;
801 }
802 }
803}
804
805static struct tty_driver *con3215_device(struct console *c, int *index)
806{
807 *index = c->index;
808 return tty3215_driver;
809}
810
811
812
813
814
815static void con3215_flush(void)
816{
817 struct raw3215_info *raw;
818 unsigned long flags;
819
820 raw = raw3215[0];
821 if (raw->flags & RAW3215_FROZEN)
822
823 if (ccw_device_force_console())
824
825 return;
826 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
827 raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
828 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
829}
830
831static int con3215_notify(struct notifier_block *self,
832 unsigned long event, void *data)
833{
834 con3215_flush();
835 return NOTIFY_OK;
836}
837
838static struct notifier_block on_panic_nb = {
839 .notifier_call = con3215_notify,
840 .priority = 0,
841};
842
843static struct notifier_block on_reboot_nb = {
844 .notifier_call = con3215_notify,
845 .priority = 0,
846};
847
848
849
850
851static struct console con3215 = {
852 .name = "ttyS",
853 .write = con3215_write,
854 .device = con3215_device,
855 .flags = CON_PRINTBUFFER,
856};
857
858
859
860
861
862static int __init con3215_init(void)
863{
864 struct ccw_device *cdev;
865 struct raw3215_info *raw;
866 struct raw3215_req *req;
867 int i;
868
869
870 if (!CONSOLE_IS_3215)
871 return -ENODEV;
872
873
874 if (MACHINE_IS_VM) {
875 cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
876 cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
877 }
878
879
880 raw3215_freelist = NULL;
881 spin_lock_init(&raw3215_freelist_lock);
882 for (i = 0; i < NR_3215_REQ; i++) {
883 req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA);
884 req->next = raw3215_freelist;
885 raw3215_freelist = req;
886 }
887
888 cdev = ccw_device_probe_console();
889 if (IS_ERR(cdev))
890 return -ENODEV;
891
892 raw3215[0] = raw = (struct raw3215_info *)
893 kzalloc(sizeof(struct raw3215_info), GFP_KERNEL | GFP_DMA);
894 raw->buffer = kzalloc(RAW3215_BUFFER_SIZE, GFP_KERNEL | GFP_DMA);
895 raw->inbuf = kzalloc(RAW3215_INBUF_SIZE, GFP_KERNEL | GFP_DMA);
896 raw->cdev = cdev;
897 dev_set_drvdata(&cdev->dev, raw);
898 cdev->handler = raw3215_irq;
899
900 raw->flags |= RAW3215_FIXED;
901 init_waitqueue_head(&raw->empty_wait);
902
903
904 if (raw3215_startup(raw) != 0) {
905 kfree(raw->inbuf);
906 kfree(raw->buffer);
907 kfree(raw);
908 raw3215[0] = NULL;
909 return -ENODEV;
910 }
911 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
912 register_reboot_notifier(&on_reboot_nb);
913 register_console(&con3215);
914 return 0;
915}
916console_initcall(con3215_init);
917#endif
918
919
920
921
922
923
924static int tty3215_open(struct tty_struct *tty, struct file * filp)
925{
926 struct raw3215_info *raw;
927 int retval, line;
928
929 line = tty->index;
930 if ((line < 0) || (line >= NR_3215))
931 return -ENODEV;
932
933 raw = raw3215[line];
934 if (raw == NULL)
935 return -ENODEV;
936
937 tty->driver_data = raw;
938 raw->tty = tty;
939
940 tty->low_latency = 0;
941
942
943
944 retval = raw3215_startup(raw);
945 if (retval)
946 return retval;
947
948 return 0;
949}
950
951
952
953
954
955
956
957static void tty3215_close(struct tty_struct *tty, struct file * filp)
958{
959 struct raw3215_info *raw;
960
961 raw = (struct raw3215_info *) tty->driver_data;
962 if (raw == NULL || tty->count > 1)
963 return;
964 tty->closing = 1;
965
966 raw3215_shutdown(raw);
967 tty->closing = 0;
968 raw->tty = NULL;
969}
970
971
972
973
974static int tty3215_write_room(struct tty_struct *tty)
975{
976 struct raw3215_info *raw;
977
978 raw = (struct raw3215_info *) tty->driver_data;
979
980
981 if ((RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE) >= 0)
982 return RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE;
983 else
984 return 0;
985}
986
987
988
989
990static int tty3215_write(struct tty_struct * tty,
991 const unsigned char *buf, int count)
992{
993 struct raw3215_info *raw;
994
995 if (!tty)
996 return 0;
997 raw = (struct raw3215_info *) tty->driver_data;
998 raw3215_write(raw, buf, count);
999 return count;
1000}
1001
1002
1003
1004
1005static int tty3215_put_char(struct tty_struct *tty, unsigned char ch)
1006{
1007 struct raw3215_info *raw;
1008
1009 if (!tty)
1010 return 0;
1011 raw = (struct raw3215_info *) tty->driver_data;
1012 raw3215_putchar(raw, ch);
1013 return 1;
1014}
1015
1016static void tty3215_flush_chars(struct tty_struct *tty)
1017{
1018}
1019
1020
1021
1022
1023static int tty3215_chars_in_buffer(struct tty_struct *tty)
1024{
1025 struct raw3215_info *raw;
1026
1027 raw = (struct raw3215_info *) tty->driver_data;
1028 return raw->count;
1029}
1030
1031static void tty3215_flush_buffer(struct tty_struct *tty)
1032{
1033 struct raw3215_info *raw;
1034
1035 raw = (struct raw3215_info *) tty->driver_data;
1036 raw3215_flush_buffer(raw);
1037 tty_wakeup(tty);
1038}
1039
1040
1041
1042
1043static int tty3215_ioctl(struct tty_struct *tty, struct file * file,
1044 unsigned int cmd, unsigned long arg)
1045{
1046 if (tty->flags & (1 << TTY_IO_ERROR))
1047 return -EIO;
1048
1049 switch (cmd) {
1050 default:
1051 return -ENOIOCTLCMD;
1052 }
1053 return 0;
1054}
1055
1056
1057
1058
1059static void tty3215_throttle(struct tty_struct * tty)
1060{
1061 struct raw3215_info *raw;
1062
1063 raw = (struct raw3215_info *) tty->driver_data;
1064 raw->flags |= RAW3215_THROTTLED;
1065}
1066
1067
1068
1069
1070static void tty3215_unthrottle(struct tty_struct * tty)
1071{
1072 struct raw3215_info *raw;
1073 unsigned long flags;
1074
1075 raw = (struct raw3215_info *) tty->driver_data;
1076 if (raw->flags & RAW3215_THROTTLED) {
1077 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
1078 raw->flags &= ~RAW3215_THROTTLED;
1079 raw3215_try_io(raw);
1080 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
1081 }
1082}
1083
1084
1085
1086
1087static void tty3215_stop(struct tty_struct *tty)
1088{
1089 struct raw3215_info *raw;
1090
1091 raw = (struct raw3215_info *) tty->driver_data;
1092 raw->flags |= RAW3215_STOPPED;
1093}
1094
1095
1096
1097
1098static void tty3215_start(struct tty_struct *tty)
1099{
1100 struct raw3215_info *raw;
1101 unsigned long flags;
1102
1103 raw = (struct raw3215_info *) tty->driver_data;
1104 if (raw->flags & RAW3215_STOPPED) {
1105 spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
1106 raw->flags &= ~RAW3215_STOPPED;
1107 raw3215_try_io(raw);
1108 spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
1109 }
1110}
1111
1112static const struct tty_operations tty3215_ops = {
1113 .open = tty3215_open,
1114 .close = tty3215_close,
1115 .write = tty3215_write,
1116 .put_char = tty3215_put_char,
1117 .flush_chars = tty3215_flush_chars,
1118 .write_room = tty3215_write_room,
1119 .chars_in_buffer = tty3215_chars_in_buffer,
1120 .flush_buffer = tty3215_flush_buffer,
1121 .ioctl = tty3215_ioctl,
1122 .throttle = tty3215_throttle,
1123 .unthrottle = tty3215_unthrottle,
1124 .stop = tty3215_stop,
1125 .start = tty3215_start,
1126};
1127
1128
1129
1130
1131
1132static int __init tty3215_init(void)
1133{
1134 struct tty_driver *driver;
1135 int ret;
1136
1137 if (!CONSOLE_IS_3215)
1138 return 0;
1139
1140 driver = alloc_tty_driver(NR_3215);
1141 if (!driver)
1142 return -ENOMEM;
1143
1144 ret = ccw_driver_register(&raw3215_ccw_driver);
1145 if (ret) {
1146 put_tty_driver(driver);
1147 return ret;
1148 }
1149
1150
1151
1152
1153
1154
1155 driver->owner = THIS_MODULE;
1156 driver->driver_name = "tty3215";
1157 driver->name = "ttyS";
1158 driver->major = TTY_MAJOR;
1159 driver->minor_start = 64;
1160 driver->type = TTY_DRIVER_TYPE_SYSTEM;
1161 driver->subtype = SYSTEM_TYPE_TTY;
1162 driver->init_termios = tty_std_termios;
1163 driver->init_termios.c_iflag = IGNBRK | IGNPAR;
1164 driver->init_termios.c_oflag = ONLCR | XTABS;
1165 driver->init_termios.c_lflag = ISIG;
1166 driver->flags = TTY_DRIVER_REAL_RAW;
1167 tty_set_operations(driver, &tty3215_ops);
1168 ret = tty_register_driver(driver);
1169 if (ret) {
1170 put_tty_driver(driver);
1171 return ret;
1172 }
1173 tty3215_driver = driver;
1174 return 0;
1175}
1176
1177static void __exit tty3215_exit(void)
1178{
1179 tty_unregister_driver(tty3215_driver);
1180 put_tty_driver(tty3215_driver);
1181 ccw_driver_unregister(&raw3215_ccw_driver);
1182}
1183
1184module_init(tty3215_init);
1185module_exit(tty3215_exit);
1186