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-rw-r--r--drivers/s390/char/tty3270.c1836
1 files changed, 1836 insertions, 0 deletions
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
new file mode 100644
index 000000000000..7db5ebce7f0f
--- /dev/null
+++ b/drivers/s390/char/tty3270.c
@@ -0,0 +1,1836 @@
1/*
2 * drivers/s390/char/tty3270.c
3 * IBM/3270 Driver - tty functions.
4 *
5 * Author(s):
6 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
7 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
8 * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
9 */
10
11#include <linux/config.h>
12#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/kdev_t.h>
15#include <linux/tty.h>
16#include <linux/vt_kern.h>
17#include <linux/init.h>
18#include <linux/console.h>
19#include <linux/interrupt.h>
20
21#include <linux/slab.h>
22#include <linux/bootmem.h>
23
24#include <asm/ccwdev.h>
25#include <asm/cio.h>
26#include <asm/ebcdic.h>
27#include <asm/uaccess.h>
28
29
30#include "raw3270.h"
31#include "keyboard.h"
32
33#define TTY3270_CHAR_BUF_SIZE 256
34#define TTY3270_OUTPUT_BUFFER_SIZE 1024
35#define TTY3270_STRING_PAGES 5
36
37struct tty_driver *tty3270_driver;
38static int tty3270_max_index;
39
40struct raw3270_fn tty3270_fn;
41
42struct tty3270_cell {
43 unsigned char character;
44 unsigned char highlight;
45 unsigned char f_color;
46};
47
48struct tty3270_line {
49 struct tty3270_cell *cells;
50 int len;
51};
52
53#define ESCAPE_NPAR 8
54
55/*
56 * The main tty view data structure.
57 * FIXME:
58 * 1) describe line orientation & lines list concept against screen
59 * 2) describe conversion of screen to lines
60 * 3) describe line format.
61 */
62struct tty3270 {
63 struct raw3270_view view;
64 struct tty_struct *tty; /* Pointer to tty structure */
65 void **freemem_pages; /* Array of pages used for freemem. */
66 struct list_head freemem; /* List of free memory for strings. */
67
68 /* Output stuff. */
69 struct list_head lines; /* List of lines. */
70 struct list_head update; /* List of lines to update. */
71 unsigned char wcc; /* Write control character. */
72 int nr_lines; /* # lines in list. */
73 int nr_up; /* # lines up in history. */
74 unsigned long update_flags; /* Update indication bits. */
75 struct string *status; /* Lower right of display. */
76 struct raw3270_request *write; /* Single write request. */
77 struct timer_list timer; /* Output delay timer. */
78
79 /* Current tty screen. */
80 unsigned int cx, cy; /* Current output position. */
81 unsigned int highlight; /* Blink/reverse/underscore */
82 unsigned int f_color; /* Foreground color */
83 struct tty3270_line *screen;
84
85 /* Input stuff. */
86 struct string *prompt; /* Output string for input area. */
87 struct string *input; /* Input string for read request. */
88 struct raw3270_request *read; /* Single read request. */
89 struct raw3270_request *kreset; /* Single keyboard reset request. */
90 unsigned char inattr; /* Visible/invisible input. */
91 int throttle, attn; /* tty throttle/unthrottle. */
92 struct tasklet_struct readlet; /* Tasklet to issue read request. */
93 struct kbd_data *kbd; /* key_maps stuff. */
94
95 /* Escape sequence parsing. */
96 int esc_state, esc_ques, esc_npar;
97 int esc_par[ESCAPE_NPAR];
98 unsigned int saved_cx, saved_cy;
99 unsigned int saved_highlight, saved_f_color;
100
101 /* Command recalling. */
102 struct list_head rcl_lines; /* List of recallable lines. */
103 struct list_head *rcl_walk; /* Point in rcl_lines list. */
104 int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
105
106 /* Character array for put_char/flush_chars. */
107 unsigned int char_count;
108 char char_buf[TTY3270_CHAR_BUF_SIZE];
109};
110
111/* tty3270->update_flags. See tty3270_update for details. */
112#define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
113#define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
114#define TTY_UPDATE_INPUT 4 /* Update input line. */
115#define TTY_UPDATE_STATUS 8 /* Update status line. */
116#define TTY_UPDATE_ALL 15
117
118static void tty3270_update(struct tty3270 *);
119
120/*
121 * Setup timeout for a device. On timeout trigger an update.
122 */
123void
124tty3270_set_timer(struct tty3270 *tp, int expires)
125{
126 if (expires == 0) {
127 if (timer_pending(&tp->timer) && del_timer(&tp->timer))
128 raw3270_put_view(&tp->view);
129 return;
130 }
131 if (timer_pending(&tp->timer) &&
132 mod_timer(&tp->timer, jiffies + expires))
133 return;
134 raw3270_get_view(&tp->view);
135 tp->timer.function = (void (*)(unsigned long)) tty3270_update;
136 tp->timer.data = (unsigned long) tp;
137 tp->timer.expires = jiffies + expires;
138 add_timer(&tp->timer);
139}
140
141/*
142 * The input line are the two last lines of the screen.
143 */
144static void
145tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
146{
147 struct string *line;
148 unsigned int off;
149
150 line = tp->prompt;
151 if (count != 0)
152 line->string[5] = TF_INMDT;
153 else
154 line->string[5] = tp->inattr;
155 if (count > tp->view.cols * 2 - 11)
156 count = tp->view.cols * 2 - 11;
157 memcpy(line->string + 6, input, count);
158 line->string[6 + count] = TO_IC;
159 /* Clear to end of input line. */
160 if (count < tp->view.cols * 2 - 11) {
161 line->string[7 + count] = TO_RA;
162 line->string[10 + count] = 0;
163 off = tp->view.cols * tp->view.rows - 9;
164 raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
165 line->len = 11 + count;
166 } else
167 line->len = 7 + count;
168 tp->update_flags |= TTY_UPDATE_INPUT;
169}
170
171static void
172tty3270_create_prompt(struct tty3270 *tp)
173{
174 static const unsigned char blueprint[] =
175 { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
176 /* empty input string */
177 TO_IC, TO_RA, 0, 0, 0 };
178 struct string *line;
179 unsigned int offset;
180
181 line = alloc_string(&tp->freemem,
182 sizeof(blueprint) + tp->view.cols * 2 - 9);
183 tp->prompt = line;
184 tp->inattr = TF_INPUT;
185 /* Copy blueprint to status line */
186 memcpy(line->string, blueprint, sizeof(blueprint));
187 line->len = sizeof(blueprint);
188 /* Set output offsets. */
189 offset = tp->view.cols * (tp->view.rows - 2);
190 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
191 offset = tp->view.cols * tp->view.rows - 9;
192 raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
193
194 /* Allocate input string for reading. */
195 tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
196}
197
198/*
199 * The status line is the last line of the screen. It shows the string
200 * "Running"/"Holding" in the lower right corner of the screen.
201 */
202static void
203tty3270_update_status(struct tty3270 * tp)
204{
205 char *str;
206
207 str = (tp->nr_up != 0) ? "History" : "Running";
208 memcpy(tp->status->string + 8, str, 7);
209 codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
210 tp->update_flags |= TTY_UPDATE_STATUS;
211}
212
213static void
214tty3270_create_status(struct tty3270 * tp)
215{
216 static const unsigned char blueprint[] =
217 { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
218 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
219 TAC_RESET };
220 struct string *line;
221 unsigned int offset;
222
223 line = alloc_string(&tp->freemem,sizeof(blueprint));
224 tp->status = line;
225 /* Copy blueprint to status line */
226 memcpy(line->string, blueprint, sizeof(blueprint));
227 /* Set address to start of status string (= last 9 characters). */
228 offset = tp->view.cols * tp->view.rows - 9;
229 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
230}
231
232/*
233 * Set output offsets to 3270 datastream fragment of a tty string.
234 * (TO_SBA offset at the start and TO_RA offset at the end of the string)
235 */
236static void
237tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
238{
239 unsigned char *cp;
240
241 raw3270_buffer_address(tp->view.dev, line->string + 1,
242 tp->view.cols * nr);
243 cp = line->string + line->len - 4;
244 if (*cp == TO_RA)
245 raw3270_buffer_address(tp->view.dev, cp + 1,
246 tp->view.cols * (nr + 1));
247}
248
249/*
250 * Rebuild update list to print all lines.
251 */
252static void
253tty3270_rebuild_update(struct tty3270 *tp)
254{
255 struct string *s, *n;
256 int line, nr_up;
257
258 /*
259 * Throw away update list and create a new one,
260 * containing all lines that will fit on the screen.
261 */
262 list_for_each_entry_safe(s, n, &tp->update, update)
263 list_del_init(&s->update);
264 line = tp->view.rows - 3;
265 nr_up = tp->nr_up;
266 list_for_each_entry_reverse(s, &tp->lines, list) {
267 if (nr_up > 0) {
268 nr_up--;
269 continue;
270 }
271 tty3270_update_string(tp, s, line);
272 list_add(&s->update, &tp->update);
273 if (--line < 0)
274 break;
275 }
276 tp->update_flags |= TTY_UPDATE_LIST;
277}
278
279/*
280 * Alloc string for size bytes. If there is not enough room in
281 * freemem, free strings until there is room.
282 */
283static struct string *
284tty3270_alloc_string(struct tty3270 *tp, size_t size)
285{
286 struct string *s, *n;
287
288 s = alloc_string(&tp->freemem, size);
289 if (s)
290 return s;
291 list_for_each_entry_safe(s, n, &tp->lines, list) {
292 BUG_ON(tp->nr_lines <= tp->view.rows - 2);
293 list_del(&s->list);
294 if (!list_empty(&s->update))
295 list_del(&s->update);
296 tp->nr_lines--;
297 if (free_string(&tp->freemem, s) >= size)
298 break;
299 }
300 s = alloc_string(&tp->freemem, size);
301 BUG_ON(!s);
302 if (tp->nr_up != 0 &&
303 tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
304 tp->nr_up = tp->nr_lines - tp->view.rows + 2;
305 tty3270_rebuild_update(tp);
306 tty3270_update_status(tp);
307 }
308 return s;
309}
310
311/*
312 * Add an empty line to the list.
313 */
314static void
315tty3270_blank_line(struct tty3270 *tp)
316{
317 static const unsigned char blueprint[] =
318 { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
319 TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
320 struct string *s;
321
322 s = tty3270_alloc_string(tp, sizeof(blueprint));
323 memcpy(s->string, blueprint, sizeof(blueprint));
324 s->len = sizeof(blueprint);
325 list_add_tail(&s->list, &tp->lines);
326 tp->nr_lines++;
327 if (tp->nr_up != 0)
328 tp->nr_up++;
329}
330
331/*
332 * Write request completion callback.
333 */
334static void
335tty3270_write_callback(struct raw3270_request *rq, void *data)
336{
337 struct tty3270 *tp;
338
339 tp = (struct tty3270 *) rq->view;
340 if (rq->rc != 0) {
341 /* Write wasn't successfull. Refresh all. */
342 tty3270_rebuild_update(tp);
343 tp->update_flags = TTY_UPDATE_ALL;
344 tty3270_set_timer(tp, 1);
345 }
346 raw3270_request_reset(rq);
347 xchg(&tp->write, rq);
348}
349
350/*
351 * Update 3270 display.
352 */
353static void
354tty3270_update(struct tty3270 *tp)
355{
356 static char invalid_sba[2] = { 0xff, 0xff };
357 struct raw3270_request *wrq;
358 unsigned long updated;
359 struct string *s, *n;
360 char *sba, *str;
361 int rc, len;
362
363 wrq = xchg(&tp->write, 0);
364 if (!wrq) {
365 tty3270_set_timer(tp, 1);
366 return;
367 }
368
369 spin_lock(&tp->view.lock);
370 updated = 0;
371 if (tp->update_flags & TTY_UPDATE_ERASE) {
372 /* Use erase write alternate to erase display. */
373 raw3270_request_set_cmd(wrq, TC_EWRITEA);
374 updated |= TTY_UPDATE_ERASE;
375 } else
376 raw3270_request_set_cmd(wrq, TC_WRITE);
377
378 raw3270_request_add_data(wrq, &tp->wcc, 1);
379 tp->wcc = TW_NONE;
380
381 /*
382 * Update status line.
383 */
384 if (tp->update_flags & TTY_UPDATE_STATUS)
385 if (raw3270_request_add_data(wrq, tp->status->string,
386 tp->status->len) == 0)
387 updated |= TTY_UPDATE_STATUS;
388
389 /*
390 * Write input line.
391 */
392 if (tp->update_flags & TTY_UPDATE_INPUT)
393 if (raw3270_request_add_data(wrq, tp->prompt->string,
394 tp->prompt->len) == 0)
395 updated |= TTY_UPDATE_INPUT;
396
397 sba = invalid_sba;
398
399 if (tp->update_flags & TTY_UPDATE_LIST) {
400 /* Write strings in the update list to the screen. */
401 list_for_each_entry_safe(s, n, &tp->update, update) {
402 str = s->string;
403 len = s->len;
404 /*
405 * Skip TO_SBA at the start of the string if the
406 * last output position matches the start address
407 * of this line.
408 */
409 if (s->string[1] == sba[0] && s->string[2] == sba[1])
410 str += 3, len -= 3;
411 if (raw3270_request_add_data(wrq, str, len) != 0)
412 break;
413 list_del_init(&s->update);
414 sba = s->string + s->len - 3;
415 }
416 if (list_empty(&tp->update))
417 updated |= TTY_UPDATE_LIST;
418 }
419 wrq->callback = tty3270_write_callback;
420 rc = raw3270_start(&tp->view, wrq);
421 if (rc == 0) {
422 tp->update_flags &= ~updated;
423 if (tp->update_flags)
424 tty3270_set_timer(tp, 1);
425 } else {
426 raw3270_request_reset(wrq);
427 xchg(&tp->write, wrq);
428 }
429 spin_unlock(&tp->view.lock);
430 raw3270_put_view(&tp->view);
431}
432
433/*
434 * Command recalling.
435 */
436static void
437tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
438{
439 struct string *s;
440
441 tp->rcl_walk = 0;
442 if (len <= 0)
443 return;
444 if (tp->rcl_nr >= tp->rcl_max) {
445 s = list_entry(tp->rcl_lines.next, struct string, list);
446 list_del(&s->list);
447 free_string(&tp->freemem, s);
448 tp->rcl_nr--;
449 }
450 s = tty3270_alloc_string(tp, len);
451 memcpy(s->string, input, len);
452 list_add_tail(&s->list, &tp->rcl_lines);
453 tp->rcl_nr++;
454}
455
456static void
457tty3270_rcl_backward(struct kbd_data *kbd)
458{
459 struct tty3270 *tp;
460 struct string *s;
461
462 tp = kbd->tty->driver_data;
463 spin_lock_bh(&tp->view.lock);
464 if (tp->inattr == TF_INPUT) {
465 if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
466 tp->rcl_walk = tp->rcl_walk->prev;
467 else if (!list_empty(&tp->rcl_lines))
468 tp->rcl_walk = tp->rcl_lines.prev;
469 s = tp->rcl_walk ?
470 list_entry(tp->rcl_walk, struct string, list) : 0;
471 if (tp->rcl_walk) {
472 s = list_entry(tp->rcl_walk, struct string, list);
473 tty3270_update_prompt(tp, s->string, s->len);
474 } else
475 tty3270_update_prompt(tp, 0, 0);
476 tty3270_set_timer(tp, 1);
477 }
478 spin_unlock_bh(&tp->view.lock);
479}
480
481/*
482 * Deactivate tty view.
483 */
484static void
485tty3270_exit_tty(struct kbd_data *kbd)
486{
487 struct tty3270 *tp;
488
489 tp = kbd->tty->driver_data;
490 raw3270_deactivate_view(&tp->view);
491}
492
493/*
494 * Scroll forward in history.
495 */
496static void
497tty3270_scroll_forward(struct kbd_data *kbd)
498{
499 struct tty3270 *tp;
500 int nr_up;
501
502 tp = kbd->tty->driver_data;
503 spin_lock_bh(&tp->view.lock);
504 nr_up = tp->nr_up - tp->view.rows + 2;
505 if (nr_up < 0)
506 nr_up = 0;
507 if (nr_up != tp->nr_up) {
508 tp->nr_up = nr_up;
509 tty3270_rebuild_update(tp);
510 tty3270_update_status(tp);
511 tty3270_set_timer(tp, 1);
512 }
513 spin_unlock_bh(&tp->view.lock);
514}
515
516/*
517 * Scroll backward in history.
518 */
519static void
520tty3270_scroll_backward(struct kbd_data *kbd)
521{
522 struct tty3270 *tp;
523 int nr_up;
524
525 tp = kbd->tty->driver_data;
526 spin_lock_bh(&tp->view.lock);
527 nr_up = tp->nr_up + tp->view.rows - 2;
528 if (nr_up + tp->view.rows - 2 > tp->nr_lines)
529 nr_up = tp->nr_lines - tp->view.rows + 2;
530 if (nr_up != tp->nr_up) {
531 tp->nr_up = nr_up;
532 tty3270_rebuild_update(tp);
533 tty3270_update_status(tp);
534 tty3270_set_timer(tp, 1);
535 }
536 spin_unlock_bh(&tp->view.lock);
537}
538
539/*
540 * Pass input line to tty.
541 */
542static void
543tty3270_read_tasklet(struct raw3270_request *rrq)
544{
545 static char kreset_data = TW_KR;
546 struct tty3270 *tp;
547 char *input;
548 int len;
549
550 tp = (struct tty3270 *) rrq->view;
551 spin_lock_bh(&tp->view.lock);
552 /*
553 * Two AID keys are special: For 0x7d (enter) the input line
554 * has to be emitted to the tty and for 0x6d the screen
555 * needs to be redrawn.
556 */
557 input = 0;
558 len = 0;
559 if (tp->input->string[0] == 0x7d) {
560 /* Enter: write input to tty. */
561 input = tp->input->string + 6;
562 len = tp->input->len - 6 - rrq->rescnt;
563 if (tp->inattr != TF_INPUTN)
564 tty3270_rcl_add(tp, input, len);
565 if (tp->nr_up > 0) {
566 tp->nr_up = 0;
567 tty3270_rebuild_update(tp);
568 tty3270_update_status(tp);
569 }
570 /* Clear input area. */
571 tty3270_update_prompt(tp, 0, 0);
572 tty3270_set_timer(tp, 1);
573 } else if (tp->input->string[0] == 0x6d) {
574 /* Display has been cleared. Redraw. */
575 tty3270_rebuild_update(tp);
576 tp->update_flags = TTY_UPDATE_ALL;
577 tty3270_set_timer(tp, 1);
578 }
579 spin_unlock_bh(&tp->view.lock);
580
581 /* Start keyboard reset command. */
582 raw3270_request_reset(tp->kreset);
583 raw3270_request_set_cmd(tp->kreset, TC_WRITE);
584 raw3270_request_add_data(tp->kreset, &kreset_data, 1);
585 raw3270_start(&tp->view, tp->kreset);
586
587 /* Emit input string. */
588 if (tp->tty) {
589 while (len-- > 0)
590 kbd_keycode(tp->kbd, *input++);
591 /* Emit keycode for AID byte. */
592 kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
593 }
594
595 raw3270_request_reset(rrq);
596 xchg(&tp->read, rrq);
597 raw3270_put_view(&tp->view);
598}
599
600/*
601 * Read request completion callback.
602 */
603static void
604tty3270_read_callback(struct raw3270_request *rq, void *data)
605{
606 raw3270_get_view(rq->view);
607 /* Schedule tasklet to pass input to tty. */
608 tasklet_schedule(&((struct tty3270 *) rq->view)->readlet);
609}
610
611/*
612 * Issue a read request. Call with device lock.
613 */
614static void
615tty3270_issue_read(struct tty3270 *tp, int lock)
616{
617 struct raw3270_request *rrq;
618 int rc;
619
620 rrq = xchg(&tp->read, 0);
621 if (!rrq)
622 /* Read already scheduled. */
623 return;
624 rrq->callback = tty3270_read_callback;
625 rrq->callback_data = tp;
626 raw3270_request_set_cmd(rrq, TC_READMOD);
627 raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
628 /* Issue the read modified request. */
629 if (lock) {
630 rc = raw3270_start(&tp->view, rrq);
631 } else
632 rc = raw3270_start_irq(&tp->view, rrq);
633 if (rc) {
634 raw3270_request_reset(rrq);
635 xchg(&tp->read, rrq);
636 }
637}
638
639/*
640 * Switch to the tty view.
641 */
642static int
643tty3270_activate(struct raw3270_view *view)
644{
645 struct tty3270 *tp;
646 unsigned long flags;
647
648 tp = (struct tty3270 *) view;
649 spin_lock_irqsave(&tp->view.lock, flags);
650 tp->nr_up = 0;
651 tty3270_rebuild_update(tp);
652 tty3270_update_status(tp);
653 tp->update_flags = TTY_UPDATE_ALL;
654 tty3270_set_timer(tp, 1);
655 spin_unlock_irqrestore(&tp->view.lock, flags);
656 start_tty(tp->tty);
657 return 0;
658}
659
660static void
661tty3270_deactivate(struct raw3270_view *view)
662{
663 struct tty3270 *tp;
664
665 tp = (struct tty3270 *) view;
666 if (tp && tp->tty)
667 stop_tty(tp->tty);
668}
669
670static int
671tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
672{
673 /* Handle ATTN. Schedule tasklet to read aid. */
674 if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
675 if (!tp->throttle)
676 tty3270_issue_read(tp, 0);
677 else
678 tp->attn = 1;
679 }
680
681 if (rq) {
682 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
683 rq->rc = -EIO;
684 else
685 /* Normal end. Copy residual count. */
686 rq->rescnt = irb->scsw.count;
687 }
688 return RAW3270_IO_DONE;
689}
690
691/*
692 * Allocate tty3270 structure.
693 */
694static struct tty3270 *
695tty3270_alloc_view(void)
696{
697 struct tty3270 *tp;
698 int pages;
699
700 tp = kmalloc(sizeof(struct tty3270),GFP_KERNEL);
701 if (!tp)
702 goto out_err;
703 memset(tp, 0, sizeof(struct tty3270));
704 tp->freemem_pages =
705 kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
706 if (!tp->freemem_pages)
707 goto out_tp;
708 INIT_LIST_HEAD(&tp->freemem);
709 init_timer(&tp->timer);
710 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
711 tp->freemem_pages[pages] = (void *)
712 __get_free_pages(GFP_KERNEL|GFP_DMA, 0);
713 if (!tp->freemem_pages[pages])
714 goto out_pages;
715 add_string_memory(&tp->freemem,
716 tp->freemem_pages[pages], PAGE_SIZE);
717 }
718 tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
719 if (!tp->write)
720 goto out_pages;
721 tp->read = raw3270_request_alloc(0);
722 if (!tp->read)
723 goto out_write;
724 tp->kreset = raw3270_request_alloc(1);
725 if (!tp->kreset)
726 goto out_read;
727 tp->kbd = kbd_alloc();
728 if (!tp->kbd)
729 goto out_reset;
730 return tp;
731
732out_reset:
733 raw3270_request_free(tp->kreset);
734out_read:
735 raw3270_request_free(tp->read);
736out_write:
737 raw3270_request_free(tp->write);
738out_pages:
739 while (pages--)
740 free_pages((unsigned long) tp->freemem_pages[pages], 0);
741 kfree(tp->freemem_pages);
742out_tp:
743 kfree(tp);
744out_err:
745 return ERR_PTR(-ENOMEM);
746}
747
748/*
749 * Free tty3270 structure.
750 */
751static void
752tty3270_free_view(struct tty3270 *tp)
753{
754 int pages;
755
756 kbd_free(tp->kbd);
757 raw3270_request_free(tp->kreset);
758 raw3270_request_free(tp->read);
759 raw3270_request_free(tp->write);
760 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
761 free_pages((unsigned long) tp->freemem_pages[pages], 0);
762 kfree(tp->freemem_pages);
763 kfree(tp);
764}
765
766/*
767 * Allocate tty3270 screen.
768 */
769static int
770tty3270_alloc_screen(struct tty3270 *tp)
771{
772 unsigned long size;
773 int lines;
774
775 size = sizeof(struct tty3270_line) * (tp->view.rows - 2);
776 tp->screen = kmalloc(size, GFP_KERNEL);
777 if (!tp->screen)
778 goto out_err;
779 memset(tp->screen, 0, size);
780 for (lines = 0; lines < tp->view.rows - 2; lines++) {
781 size = sizeof(struct tty3270_cell) * tp->view.cols;
782 tp->screen[lines].cells = kmalloc(size, GFP_KERNEL);
783 if (!tp->screen[lines].cells)
784 goto out_screen;
785 memset(tp->screen[lines].cells, 0, size);
786 }
787 return 0;
788out_screen:
789 while (lines--)
790 kfree(tp->screen[lines].cells);
791 kfree(tp->screen);
792out_err:
793 return -ENOMEM;
794}
795
796/*
797 * Free tty3270 screen.
798 */
799static void
800tty3270_free_screen(struct tty3270 *tp)
801{
802 int lines;
803
804 for (lines = 0; lines < tp->view.rows - 2; lines++)
805 kfree(tp->screen[lines].cells);
806 kfree(tp->screen);
807}
808
809/*
810 * Unlink tty3270 data structure from tty.
811 */
812static void
813tty3270_release(struct raw3270_view *view)
814{
815 struct tty3270 *tp;
816 struct tty_struct *tty;
817
818 tp = (struct tty3270 *) view;
819 tty = tp->tty;
820 if (tty) {
821 tty->driver_data = 0;
822 tp->tty = tp->kbd->tty = 0;
823 tty_hangup(tty);
824 raw3270_put_view(&tp->view);
825 }
826}
827
828/*
829 * Free tty3270 data structure
830 */
831static void
832tty3270_free(struct raw3270_view *view)
833{
834 tty3270_free_screen((struct tty3270 *) view);
835 tty3270_free_view((struct tty3270 *) view);
836}
837
838/*
839 * Delayed freeing of tty3270 views.
840 */
841static void
842tty3270_del_views(void)
843{
844 struct tty3270 *tp;
845 int i;
846
847 for (i = 0; i < tty3270_max_index; i++) {
848 tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, i);
849 if (!IS_ERR(tp))
850 raw3270_del_view(&tp->view);
851 }
852}
853
854struct raw3270_fn tty3270_fn = {
855 .activate = tty3270_activate,
856 .deactivate = tty3270_deactivate,
857 .intv = (void *) tty3270_irq,
858 .release = tty3270_release,
859 .free = tty3270_free
860};
861
862/*
863 * This routine is called whenever a 3270 tty is opened.
864 */
865static int
866tty3270_open(struct tty_struct *tty, struct file * filp)
867{
868 struct tty3270 *tp;
869 int i, rc;
870
871 if (tty->count > 1)
872 return 0;
873 /* Check if the tty3270 is already there. */
874 tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, tty->index);
875 if (!IS_ERR(tp)) {
876 tty->driver_data = tp;
877 tty->winsize.ws_row = tp->view.rows - 2;
878 tty->winsize.ws_col = tp->view.cols;
879 tty->low_latency = 0;
880 tp->tty = tty;
881 tp->kbd->tty = tty;
882 tp->inattr = TF_INPUT;
883 return 0;
884 }
885 if (tty3270_max_index < tty->index + 1)
886 tty3270_max_index = tty->index + 1;
887
888 /* Quick exit if there is no device for tty->index. */
889 if (PTR_ERR(tp) == -ENODEV)
890 return -ENODEV;
891
892 /* Allocate tty3270 structure on first open. */
893 tp = tty3270_alloc_view();
894 if (IS_ERR(tp))
895 return PTR_ERR(tp);
896
897 INIT_LIST_HEAD(&tp->lines);
898 INIT_LIST_HEAD(&tp->update);
899 INIT_LIST_HEAD(&tp->rcl_lines);
900 tp->rcl_max = 20;
901 init_timer(&tp->timer);
902 tasklet_init(&tp->readlet,
903 (void (*)(unsigned long)) tty3270_read_tasklet,
904 (unsigned long) tp->read);
905
906 rc = raw3270_add_view(&tp->view, &tty3270_fn, tty->index);
907 if (rc) {
908 tty3270_free_view(tp);
909 return rc;
910 }
911
912 rc = tty3270_alloc_screen(tp);
913 if (rc) {
914 raw3270_del_view(&tp->view);
915 raw3270_put_view(&tp->view);
916 return rc;
917 }
918
919 tp->tty = tty;
920 tty->low_latency = 0;
921 tty->driver_data = tp;
922 tty->winsize.ws_row = tp->view.rows - 2;
923 tty->winsize.ws_col = tp->view.cols;
924
925 tty3270_create_prompt(tp);
926 tty3270_create_status(tp);
927 tty3270_update_status(tp);
928
929 /* Create blank line for every line in the tty output area. */
930 for (i = 0; i < tp->view.rows - 2; i++)
931 tty3270_blank_line(tp);
932
933 tp->kbd->tty = tty;
934 tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
935 tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
936 tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
937 tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
938 kbd_ascebc(tp->kbd, tp->view.ascebc);
939
940 raw3270_activate_view(&tp->view);
941 return 0;
942}
943
944/*
945 * This routine is called when the 3270 tty is closed. We wait
946 * for the remaining request to be completed. Then we clean up.
947 */
948static void
949tty3270_close(struct tty_struct *tty, struct file * filp)
950{
951 struct tty3270 *tp;
952
953 if (tty->count > 1)
954 return;
955 tp = (struct tty3270 *) tty->driver_data;
956 if (tp) {
957 tty->driver_data = 0;
958 tp->tty = tp->kbd->tty = 0;
959 raw3270_put_view(&tp->view);
960 }
961}
962
963/*
964 * We always have room.
965 */
966static int
967tty3270_write_room(struct tty_struct *tty)
968{
969 return INT_MAX;
970}
971
972/*
973 * Insert character into the screen at the current position with the
974 * current color and highlight. This function does NOT do cursor movement.
975 */
976static void
977tty3270_put_character(struct tty3270 *tp, char ch)
978{
979 struct tty3270_line *line;
980 struct tty3270_cell *cell;
981
982 line = tp->screen + tp->cy;
983 if (line->len <= tp->cx) {
984 while (line->len < tp->cx) {
985 cell = line->cells + line->len;
986 cell->character = tp->view.ascebc[' '];
987 cell->highlight = tp->highlight;
988 cell->f_color = tp->f_color;
989 line->len++;
990 }
991 line->len++;
992 }
993 cell = line->cells + tp->cx;
994 cell->character = tp->view.ascebc[(unsigned int) ch];
995 cell->highlight = tp->highlight;
996 cell->f_color = tp->f_color;
997}
998
999/*
1000 * Convert a tty3270_line to a 3270 data fragment usable for output.
1001 */
1002static void
1003tty3270_convert_line(struct tty3270 *tp, int line_nr)
1004{
1005 struct tty3270_line *line;
1006 struct tty3270_cell *cell;
1007 struct string *s, *n;
1008 unsigned char highlight;
1009 unsigned char f_color;
1010 char *cp;
1011 int flen, i;
1012
1013 /* Determine how long the fragment will be. */
1014 flen = 3; /* Prefix (TO_SBA). */
1015 line = tp->screen + line_nr;
1016 flen += line->len;
1017 highlight = TAX_RESET;
1018 f_color = TAC_RESET;
1019 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1020 if (cell->highlight != highlight) {
1021 flen += 3; /* TO_SA to switch highlight. */
1022 highlight = cell->highlight;
1023 }
1024 if (cell->f_color != f_color) {
1025 flen += 3; /* TO_SA to switch color. */
1026 f_color = cell->f_color;
1027 }
1028 }
1029 if (highlight != TAX_RESET)
1030 flen += 3; /* TO_SA to reset hightlight. */
1031 if (f_color != TAC_RESET)
1032 flen += 3; /* TO_SA to reset color. */
1033 if (line->len < tp->view.cols)
1034 flen += 4; /* Postfix (TO_RA). */
1035
1036 /* Find the line in the list. */
1037 i = tp->view.rows - 2 - line_nr;
1038 list_for_each_entry_reverse(s, &tp->lines, list)
1039 if (--i <= 0)
1040 break;
1041 /*
1042 * Check if the line needs to get reallocated.
1043 */
1044 if (s->len != flen) {
1045 /* Reallocate string. */
1046 n = tty3270_alloc_string(tp, flen);
1047 list_add(&n->list, &s->list);
1048 list_del_init(&s->list);
1049 if (!list_empty(&s->update))
1050 list_del_init(&s->update);
1051 free_string(&tp->freemem, s);
1052 s = n;
1053 }
1054
1055 /* Write 3270 data fragment. */
1056 cp = s->string;
1057 *cp++ = TO_SBA;
1058 *cp++ = 0;
1059 *cp++ = 0;
1060
1061 highlight = TAX_RESET;
1062 f_color = TAC_RESET;
1063 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1064 if (cell->highlight != highlight) {
1065 *cp++ = TO_SA;
1066 *cp++ = TAT_EXTHI;
1067 *cp++ = cell->highlight;
1068 highlight = cell->highlight;
1069 }
1070 if (cell->f_color != f_color) {
1071 *cp++ = TO_SA;
1072 *cp++ = TAT_COLOR;
1073 *cp++ = cell->f_color;
1074 f_color = cell->f_color;
1075 }
1076 *cp++ = cell->character;
1077 }
1078 if (highlight != TAX_RESET) {
1079 *cp++ = TO_SA;
1080 *cp++ = TAT_EXTHI;
1081 *cp++ = TAX_RESET;
1082 }
1083 if (f_color != TAC_RESET) {
1084 *cp++ = TO_SA;
1085 *cp++ = TAT_COLOR;
1086 *cp++ = TAC_RESET;
1087 }
1088 if (line->len < tp->view.cols) {
1089 *cp++ = TO_RA;
1090 *cp++ = 0;
1091 *cp++ = 0;
1092 *cp++ = 0;
1093 }
1094
1095 if (tp->nr_up + line_nr < tp->view.rows - 2) {
1096 /* Line is currently visible on screen. */
1097 tty3270_update_string(tp, s, line_nr);
1098 /* Add line to update list. */
1099 if (list_empty(&s->update)) {
1100 list_add_tail(&s->update, &tp->update);
1101 tp->update_flags |= TTY_UPDATE_LIST;
1102 }
1103 }
1104}
1105
1106/*
1107 * Do carriage return.
1108 */
1109static void
1110tty3270_cr(struct tty3270 *tp)
1111{
1112 tp->cx = 0;
1113}
1114
1115/*
1116 * Do line feed.
1117 */
1118static void
1119tty3270_lf(struct tty3270 *tp)
1120{
1121 struct tty3270_line temp;
1122 int i;
1123
1124 tty3270_convert_line(tp, tp->cy);
1125 if (tp->cy < tp->view.rows - 3) {
1126 tp->cy++;
1127 return;
1128 }
1129 /* Last line just filled up. Add new, blank line. */
1130 tty3270_blank_line(tp);
1131 temp = tp->screen[0];
1132 temp.len = 0;
1133 for (i = 0; i < tp->view.rows - 3; i++)
1134 tp->screen[i] = tp->screen[i+1];
1135 tp->screen[tp->view.rows - 3] = temp;
1136 tty3270_rebuild_update(tp);
1137}
1138
1139static void
1140tty3270_ri(struct tty3270 *tp)
1141{
1142 if (tp->cy > 0) {
1143 tty3270_convert_line(tp, tp->cy);
1144 tp->cy--;
1145 }
1146}
1147
1148/*
1149 * Insert characters at current position.
1150 */
1151static void
1152tty3270_insert_characters(struct tty3270 *tp, int n)
1153{
1154 struct tty3270_line *line;
1155 int k;
1156
1157 line = tp->screen + tp->cy;
1158 while (line->len < tp->cx) {
1159 line->cells[line->len].character = tp->view.ascebc[' '];
1160 line->cells[line->len].highlight = TAX_RESET;
1161 line->cells[line->len].f_color = TAC_RESET;
1162 line->len++;
1163 }
1164 if (n > tp->view.cols - tp->cx)
1165 n = tp->view.cols - tp->cx;
1166 k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
1167 while (k--)
1168 line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
1169 line->len += n;
1170 if (line->len > tp->view.cols)
1171 line->len = tp->view.cols;
1172 while (n-- > 0) {
1173 line->cells[tp->cx + n].character = tp->view.ascebc[' '];
1174 line->cells[tp->cx + n].highlight = tp->highlight;
1175 line->cells[tp->cx + n].f_color = tp->f_color;
1176 }
1177}
1178
1179/*
1180 * Delete characters at current position.
1181 */
1182static void
1183tty3270_delete_characters(struct tty3270 *tp, int n)
1184{
1185 struct tty3270_line *line;
1186 int i;
1187
1188 line = tp->screen + tp->cy;
1189 if (line->len <= tp->cx)
1190 return;
1191 if (line->len - tp->cx <= n) {
1192 line->len = tp->cx;
1193 return;
1194 }
1195 for (i = tp->cx; i + n < line->len; i++)
1196 line->cells[i] = line->cells[i + n];
1197 line->len -= n;
1198}
1199
1200/*
1201 * Erase characters at current position.
1202 */
1203static void
1204tty3270_erase_characters(struct tty3270 *tp, int n)
1205{
1206 struct tty3270_line *line;
1207 struct tty3270_cell *cell;
1208
1209 line = tp->screen + tp->cy;
1210 while (line->len > tp->cx && n-- > 0) {
1211 cell = line->cells + tp->cx++;
1212 cell->character = ' ';
1213 cell->highlight = TAX_RESET;
1214 cell->f_color = TAC_RESET;
1215 }
1216 tp->cx += n;
1217 tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
1218}
1219
1220/*
1221 * Erase line, 3 different cases:
1222 * Esc [ 0 K Erase from current position to end of line inclusive
1223 * Esc [ 1 K Erase from beginning of line to current position inclusive
1224 * Esc [ 2 K Erase entire line (without moving cursor)
1225 */
1226static void
1227tty3270_erase_line(struct tty3270 *tp, int mode)
1228{
1229 struct tty3270_line *line;
1230 struct tty3270_cell *cell;
1231 int i;
1232
1233 line = tp->screen + tp->cy;
1234 if (mode == 0)
1235 line->len = tp->cx;
1236 else if (mode == 1) {
1237 for (i = 0; i < tp->cx; i++) {
1238 cell = line->cells + i;
1239 cell->character = ' ';
1240 cell->highlight = TAX_RESET;
1241 cell->f_color = TAC_RESET;
1242 }
1243 if (line->len <= tp->cx)
1244 line->len = tp->cx + 1;
1245 } else if (mode == 2)
1246 line->len = 0;
1247 tty3270_convert_line(tp, tp->cy);
1248}
1249
1250/*
1251 * Erase display, 3 different cases:
1252 * Esc [ 0 J Erase from current position to bottom of screen inclusive
1253 * Esc [ 1 J Erase from top of screen to current position inclusive
1254 * Esc [ 2 J Erase entire screen (without moving the cursor)
1255 */
1256static void
1257tty3270_erase_display(struct tty3270 *tp, int mode)
1258{
1259 int i;
1260
1261 if (mode == 0) {
1262 tty3270_erase_line(tp, 0);
1263 for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
1264 tp->screen[i].len = 0;
1265 tty3270_convert_line(tp, i);
1266 }
1267 } else if (mode == 1) {
1268 for (i = 0; i < tp->cy; i++) {
1269 tp->screen[i].len = 0;
1270 tty3270_convert_line(tp, i);
1271 }
1272 tty3270_erase_line(tp, 1);
1273 } else if (mode == 2) {
1274 for (i = 0; i < tp->view.rows - 2; i++) {
1275 tp->screen[i].len = 0;
1276 tty3270_convert_line(tp, i);
1277 }
1278 }
1279 tty3270_rebuild_update(tp);
1280}
1281
1282/*
1283 * Set attributes found in an escape sequence.
1284 * Esc [ <attr> ; <attr> ; ... m
1285 */
1286static void
1287tty3270_set_attributes(struct tty3270 *tp)
1288{
1289 static unsigned char f_colors[] = {
1290 TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
1291 TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
1292 };
1293 int i, attr;
1294
1295 for (i = 0; i <= tp->esc_npar; i++) {
1296 attr = tp->esc_par[i];
1297 switch (attr) {
1298 case 0: /* Reset */
1299 tp->highlight = TAX_RESET;
1300 tp->f_color = TAC_RESET;
1301 break;
1302 /* Highlight. */
1303 case 4: /* Start underlining. */
1304 tp->highlight = TAX_UNDER;
1305 break;
1306 case 5: /* Start blink. */
1307 tp->highlight = TAX_BLINK;
1308 break;
1309 case 7: /* Start reverse. */
1310 tp->highlight = TAX_REVER;
1311 break;
1312 case 24: /* End underlining */
1313 if (tp->highlight == TAX_UNDER)
1314 tp->highlight = TAX_RESET;
1315 break;
1316 case 25: /* End blink. */
1317 if (tp->highlight == TAX_BLINK)
1318 tp->highlight = TAX_RESET;
1319 break;
1320 case 27: /* End reverse. */
1321 if (tp->highlight == TAX_REVER)
1322 tp->highlight = TAX_RESET;
1323 break;
1324 /* Foreground color. */
1325 case 30: /* Black */
1326 case 31: /* Red */
1327 case 32: /* Green */
1328 case 33: /* Yellow */
1329 case 34: /* Blue */
1330 case 35: /* Magenta */
1331 case 36: /* Cyan */
1332 case 37: /* White */
1333 case 39: /* Black */
1334 tp->f_color = f_colors[attr - 30];
1335 break;
1336 }
1337 }
1338}
1339
1340static inline int
1341tty3270_getpar(struct tty3270 *tp, int ix)
1342{
1343 return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
1344}
1345
1346static void
1347tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
1348{
1349 tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx));
1350 cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy));
1351 if (cy != tp->cy) {
1352 tty3270_convert_line(tp, tp->cy);
1353 tp->cy = cy;
1354 }
1355}
1356
1357/*
1358 * Process escape sequences. Known sequences:
1359 * Esc 7 Save Cursor Position
1360 * Esc 8 Restore Cursor Position
1361 * Esc [ Pn ; Pn ; .. m Set attributes
1362 * Esc [ Pn ; Pn H Cursor Position
1363 * Esc [ Pn ; Pn f Cursor Position
1364 * Esc [ Pn A Cursor Up
1365 * Esc [ Pn B Cursor Down
1366 * Esc [ Pn C Cursor Forward
1367 * Esc [ Pn D Cursor Backward
1368 * Esc [ Pn G Cursor Horizontal Absolute
1369 * Esc [ Pn X Erase Characters
1370 * Esc [ Ps J Erase in Display
1371 * Esc [ Ps K Erase in Line
1372 * // FIXME: add all the new ones.
1373 *
1374 * Pn is a numeric parameter, a string of zero or more decimal digits.
1375 * Ps is a selective parameter.
1376 */
1377static void
1378tty3270_escape_sequence(struct tty3270 *tp, char ch)
1379{
1380 enum { ESnormal, ESesc, ESsquare, ESgetpars };
1381
1382 if (tp->esc_state == ESnormal) {
1383 if (ch == 0x1b)
1384 /* Starting new escape sequence. */
1385 tp->esc_state = ESesc;
1386 return;
1387 }
1388 if (tp->esc_state == ESesc) {
1389 tp->esc_state = ESnormal;
1390 switch (ch) {
1391 case '[':
1392 tp->esc_state = ESsquare;
1393 break;
1394 case 'E':
1395 tty3270_cr(tp);
1396 tty3270_lf(tp);
1397 break;
1398 case 'M':
1399 tty3270_ri(tp);
1400 break;
1401 case 'D':
1402 tty3270_lf(tp);
1403 break;
1404 case 'Z': /* Respond ID. */
1405 kbd_puts_queue(tp->tty, "\033[?6c");
1406 break;
1407 case '7': /* Save cursor position. */
1408 tp->saved_cx = tp->cx;
1409 tp->saved_cy = tp->cy;
1410 tp->saved_highlight = tp->highlight;
1411 tp->saved_f_color = tp->f_color;
1412 break;
1413 case '8': /* Restore cursor position. */
1414 tty3270_convert_line(tp, tp->cy);
1415 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1416 tp->highlight = tp->saved_highlight;
1417 tp->f_color = tp->saved_f_color;
1418 break;
1419 case 'c': /* Reset terminal. */
1420 tp->cx = tp->saved_cx = 0;
1421 tp->cy = tp->saved_cy = 0;
1422 tp->highlight = tp->saved_highlight = TAX_RESET;
1423 tp->f_color = tp->saved_f_color = TAC_RESET;
1424 tty3270_erase_display(tp, 2);
1425 break;
1426 }
1427 return;
1428 }
1429 if (tp->esc_state == ESsquare) {
1430 tp->esc_state = ESgetpars;
1431 memset(tp->esc_par, 0, sizeof(tp->esc_par));
1432 tp->esc_npar = 0;
1433 tp->esc_ques = (ch == '?');
1434 if (tp->esc_ques)
1435 return;
1436 }
1437 if (tp->esc_state == ESgetpars) {
1438 if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
1439 tp->esc_npar++;
1440 return;
1441 }
1442 if (ch >= '0' && ch <= '9') {
1443 tp->esc_par[tp->esc_npar] *= 10;
1444 tp->esc_par[tp->esc_npar] += ch - '0';
1445 return;
1446 }
1447 }
1448 tp->esc_state = ESnormal;
1449 if (ch == 'n' && !tp->esc_ques) {
1450 if (tp->esc_par[0] == 5) /* Status report. */
1451 kbd_puts_queue(tp->tty, "\033[0n");
1452 else if (tp->esc_par[0] == 6) { /* Cursor report. */
1453 char buf[40];
1454 sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
1455 kbd_puts_queue(tp->tty, buf);
1456 }
1457 return;
1458 }
1459 if (tp->esc_ques)
1460 return;
1461 switch (ch) {
1462 case 'm':
1463 tty3270_set_attributes(tp);
1464 break;
1465 case 'H': /* Set cursor position. */
1466 case 'f':
1467 tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
1468 tty3270_getpar(tp, 0) - 1);
1469 break;
1470 case 'd': /* Set y position. */
1471 tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
1472 break;
1473 case 'A': /* Cursor up. */
1474 case 'F':
1475 tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
1476 break;
1477 case 'B': /* Cursor down. */
1478 case 'e':
1479 case 'E':
1480 tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
1481 break;
1482 case 'C': /* Cursor forward. */
1483 case 'a':
1484 tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
1485 break;
1486 case 'D': /* Cursor backward. */
1487 tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
1488 break;
1489 case 'G': /* Set x position. */
1490 case '`':
1491 tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
1492 break;
1493 case 'X': /* Erase Characters. */
1494 tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
1495 break;
1496 case 'J': /* Erase display. */
1497 tty3270_erase_display(tp, tp->esc_par[0]);
1498 break;
1499 case 'K': /* Erase line. */
1500 tty3270_erase_line(tp, tp->esc_par[0]);
1501 break;
1502 case 'P': /* Delete characters. */
1503 tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
1504 break;
1505 case '@': /* Insert characters. */
1506 tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
1507 break;
1508 case 's': /* Save cursor position. */
1509 tp->saved_cx = tp->cx;
1510 tp->saved_cy = tp->cy;
1511 tp->saved_highlight = tp->highlight;
1512 tp->saved_f_color = tp->f_color;
1513 break;
1514 case 'u': /* Restore cursor position. */
1515 tty3270_convert_line(tp, tp->cy);
1516 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1517 tp->highlight = tp->saved_highlight;
1518 tp->f_color = tp->saved_f_color;
1519 break;
1520 }
1521}
1522
1523/*
1524 * String write routine for 3270 ttys
1525 */
1526static void
1527tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count)
1528{
1529 int i_msg, i;
1530
1531 spin_lock_bh(&tp->view.lock);
1532 for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) {
1533 if (tp->esc_state != 0) {
1534 /* Continue escape sequence. */
1535 tty3270_escape_sequence(tp, buf[i_msg]);
1536 continue;
1537 }
1538
1539 switch (buf[i_msg]) {
1540 case 0x07: /* '\a' -- Alarm */
1541 tp->wcc |= TW_PLUSALARM;
1542 break;
1543 case 0x08: /* Backspace. */
1544 if (tp->cx > 0) {
1545 tp->cx--;
1546 tty3270_put_character(tp, ' ');
1547 }
1548 break;
1549 case 0x09: /* '\t' -- Tabulate */
1550 for (i = tp->cx % 8; i < 8; i++) {
1551 if (tp->cx >= tp->view.cols) {
1552 tty3270_cr(tp);
1553 tty3270_lf(tp);
1554 break;
1555 }
1556 tty3270_put_character(tp, ' ');
1557 tp->cx++;
1558 }
1559 break;
1560 case 0x0a: /* '\n' -- New Line */
1561 tty3270_cr(tp);
1562 tty3270_lf(tp);
1563 break;
1564 case 0x0c: /* '\f' -- Form Feed */
1565 tty3270_erase_display(tp, 2);
1566 tp->cx = tp->cy = 0;
1567 break;
1568 case 0x0d: /* '\r' -- Carriage Return */
1569 tp->cx = 0;
1570 break;
1571 case 0x0f: /* SuSE "exit alternate mode" */
1572 break;
1573 case 0x1b: /* Start escape sequence. */
1574 tty3270_escape_sequence(tp, buf[i_msg]);
1575 break;
1576 default: /* Insert normal character. */
1577 if (tp->cx >= tp->view.cols) {
1578 tty3270_cr(tp);
1579 tty3270_lf(tp);
1580 }
1581 tty3270_put_character(tp, buf[i_msg]);
1582 tp->cx++;
1583 break;
1584 }
1585 }
1586 /* Convert current line to 3270 data fragment. */
1587 tty3270_convert_line(tp, tp->cy);
1588
1589 /* Setup timer to update display after 1/10 second */
1590 if (!timer_pending(&tp->timer))
1591 tty3270_set_timer(tp, HZ/10);
1592
1593 spin_unlock_bh(&tp->view.lock);
1594}
1595
1596/*
1597 * String write routine for 3270 ttys
1598 */
1599static int
1600tty3270_write(struct tty_struct * tty,
1601 const unsigned char *buf, int count)
1602{
1603 struct tty3270 *tp;
1604
1605 tp = tty->driver_data;
1606 if (!tp)
1607 return 0;
1608 if (tp->char_count > 0) {
1609 tty3270_do_write(tp, tp->char_buf, tp->char_count);
1610 tp->char_count = 0;
1611 }
1612 tty3270_do_write(tp, buf, count);
1613 return count;
1614}
1615
1616/*
1617 * Put single characters to the ttys character buffer
1618 */
1619static void
1620tty3270_put_char(struct tty_struct *tty, unsigned char ch)
1621{
1622 struct tty3270 *tp;
1623
1624 tp = tty->driver_data;
1625 if (!tp)
1626 return;
1627 if (tp->char_count < TTY3270_CHAR_BUF_SIZE)
1628 tp->char_buf[tp->char_count++] = ch;
1629}
1630
1631/*
1632 * Flush all characters from the ttys characeter buffer put there
1633 * by tty3270_put_char.
1634 */
1635static void
1636tty3270_flush_chars(struct tty_struct *tty)
1637{
1638 struct tty3270 *tp;
1639
1640 tp = tty->driver_data;
1641 if (!tp)
1642 return;
1643 if (tp->char_count > 0) {
1644 tty3270_do_write(tp, tp->char_buf, tp->char_count);
1645 tp->char_count = 0;
1646 }
1647}
1648
1649/*
1650 * Returns the number of characters in the output buffer. This is
1651 * used in tty_wait_until_sent to wait until all characters have
1652 * appeared on the screen.
1653 */
1654static int
1655tty3270_chars_in_buffer(struct tty_struct *tty)
1656{
1657 return 0;
1658}
1659
1660static void
1661tty3270_flush_buffer(struct tty_struct *tty)
1662{
1663}
1664
1665/*
1666 * Check for visible/invisible input switches
1667 */
1668static void
1669tty3270_set_termios(struct tty_struct *tty, struct termios *old)
1670{
1671 struct tty3270 *tp;
1672 int new;
1673
1674 tp = tty->driver_data;
1675 if (!tp)
1676 return;
1677 spin_lock_bh(&tp->view.lock);
1678 if (L_ICANON(tty)) {
1679 new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
1680 if (new != tp->inattr) {
1681 tp->inattr = new;
1682 tty3270_update_prompt(tp, 0, 0);
1683 tty3270_set_timer(tp, 1);
1684 }
1685 }
1686 spin_unlock_bh(&tp->view.lock);
1687}
1688
1689/*
1690 * Disable reading from a 3270 tty
1691 */
1692static void
1693tty3270_throttle(struct tty_struct * tty)
1694{
1695 struct tty3270 *tp;
1696
1697 tp = tty->driver_data;
1698 if (!tp)
1699 return;
1700 tp->throttle = 1;
1701}
1702
1703/*
1704 * Enable reading from a 3270 tty
1705 */
1706static void
1707tty3270_unthrottle(struct tty_struct * tty)
1708{
1709 struct tty3270 *tp;
1710
1711 tp = tty->driver_data;
1712 if (!tp)
1713 return;
1714 tp->throttle = 0;
1715 if (tp->attn)
1716 tty3270_issue_read(tp, 1);
1717}
1718
1719/*
1720 * Hang up the tty device.
1721 */
1722static void
1723tty3270_hangup(struct tty_struct *tty)
1724{
1725 // FIXME: implement
1726}
1727
1728static void
1729tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
1730{
1731}
1732
1733static int
1734tty3270_ioctl(struct tty_struct *tty, struct file *file,
1735 unsigned int cmd, unsigned long arg)
1736{
1737 struct tty3270 *tp;
1738
1739 tp = tty->driver_data;
1740 if (!tp)
1741 return -ENODEV;
1742 if (tty->flags & (1 << TTY_IO_ERROR))
1743 return -EIO;
1744 return kbd_ioctl(tp->kbd, file, cmd, arg);
1745}
1746
1747static struct tty_operations tty3270_ops = {
1748 .open = tty3270_open,
1749 .close = tty3270_close,
1750 .write = tty3270_write,
1751 .put_char = tty3270_put_char,
1752 .flush_chars = tty3270_flush_chars,
1753 .write_room = tty3270_write_room,
1754 .chars_in_buffer = tty3270_chars_in_buffer,
1755 .flush_buffer = tty3270_flush_buffer,
1756 .throttle = tty3270_throttle,
1757 .unthrottle = tty3270_unthrottle,
1758 .hangup = tty3270_hangup,
1759 .wait_until_sent = tty3270_wait_until_sent,
1760 .ioctl = tty3270_ioctl,
1761 .set_termios = tty3270_set_termios
1762};
1763
1764void
1765tty3270_notifier(int index, int active)
1766{
1767 if (active)
1768 tty_register_device(tty3270_driver, index, 0);
1769 else
1770 tty_unregister_device(tty3270_driver, index);
1771}
1772
1773/*
1774 * 3270 tty registration code called from tty_init().
1775 * Most kernel services (incl. kmalloc) are available at this poimt.
1776 */
1777int __init
1778tty3270_init(void)
1779{
1780 struct tty_driver *driver;
1781 int ret;
1782
1783 driver = alloc_tty_driver(256);
1784 if (!driver)
1785 return -ENOMEM;
1786
1787 /*
1788 * Initialize the tty_driver structure
1789 * Entries in tty3270_driver that are NOT initialized:
1790 * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
1791 */
1792 driver->owner = THIS_MODULE;
1793 driver->devfs_name = "ttyTUB/";
1794 driver->driver_name = "ttyTUB";
1795 driver->name = "ttyTUB";
1796 driver->major = IBM_TTY3270_MAJOR;
1797 driver->type = TTY_DRIVER_TYPE_SYSTEM;
1798 driver->subtype = SYSTEM_TYPE_TTY;
1799 driver->init_termios = tty_std_termios;
1800 driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS;
1801 tty_set_operations(driver, &tty3270_ops);
1802 ret = tty_register_driver(driver);
1803 if (ret) {
1804 printk(KERN_ERR "tty3270 registration failed with %d\n", ret);
1805 put_tty_driver(driver);
1806 return ret;
1807 }
1808 tty3270_driver = driver;
1809 ret = raw3270_register_notifier(tty3270_notifier);
1810 if (ret) {
1811 printk(KERN_ERR "tty3270 notifier registration failed "
1812 "with %d\n", ret);
1813 put_tty_driver(driver);
1814 return ret;
1815
1816 }
1817 return 0;
1818}
1819
1820static void __exit
1821tty3270_exit(void)
1822{
1823 struct tty_driver *driver;
1824
1825 raw3270_unregister_notifier(tty3270_notifier);
1826 driver = tty3270_driver;
1827 tty3270_driver = 0;
1828 tty_unregister_driver(driver);
1829 tty3270_del_views();
1830}
1831
1832MODULE_LICENSE("GPL");
1833MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
1834
1835module_init(tty3270_init);
1836module_exit(tty3270_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 03:48:14 -0500