blob: 4717c3611601f308094f588238a5b6c8c039cbd9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/kdev_t.h>
14#include <linux/tty.h>
15#include <linux/vt_kern.h>
16#include <linux/init.h>
17#include <linux/console.h>
18#include <linux/interrupt.h>
19
20#include <linux/slab.h>
21#include <linux/bootmem.h>
22
23#include <asm/ccwdev.h>
24#include <asm/cio.h>
25#include <asm/ebcdic.h>
26#include <asm/uaccess.h>
27
28
29#include "raw3270.h"
30#include "keyboard.h"
31
32#define TTY3270_CHAR_BUF_SIZE 256
33#define TTY3270_OUTPUT_BUFFER_SIZE 1024
34#define TTY3270_STRING_PAGES 5
35
36struct tty_driver *tty3270_driver;
37static int tty3270_max_index;
38
39struct raw3270_fn tty3270_fn;
40
41struct tty3270_cell {
42 unsigned char character;
43 unsigned char highlight;
44 unsigned char f_color;
45};
46
47struct tty3270_line {
48 struct tty3270_cell *cells;
49 int len;
50};
51
52#define ESCAPE_NPAR 8
53
54/*
55 * The main tty view data structure.
56 * FIXME:
57 * 1) describe line orientation & lines list concept against screen
58 * 2) describe conversion of screen to lines
59 * 3) describe line format.
60 */
61struct tty3270 {
62 struct raw3270_view view;
63 struct tty_struct *tty; /* Pointer to tty structure */
64 void **freemem_pages; /* Array of pages used for freemem. */
65 struct list_head freemem; /* List of free memory for strings. */
66
67 /* Output stuff. */
68 struct list_head lines; /* List of lines. */
69 struct list_head update; /* List of lines to update. */
70 unsigned char wcc; /* Write control character. */
71 int nr_lines; /* # lines in list. */
72 int nr_up; /* # lines up in history. */
73 unsigned long update_flags; /* Update indication bits. */
74 struct string *status; /* Lower right of display. */
75 struct raw3270_request *write; /* Single write request. */
76 struct timer_list timer; /* Output delay timer. */
77
78 /* Current tty screen. */
79 unsigned int cx, cy; /* Current output position. */
80 unsigned int highlight; /* Blink/reverse/underscore */
81 unsigned int f_color; /* Foreground color */
82 struct tty3270_line *screen;
83
84 /* Input stuff. */
85 struct string *prompt; /* Output string for input area. */
86 struct string *input; /* Input string for read request. */
87 struct raw3270_request *read; /* Single read request. */
88 struct raw3270_request *kreset; /* Single keyboard reset request. */
89 unsigned char inattr; /* Visible/invisible input. */
90 int throttle, attn; /* tty throttle/unthrottle. */
91 struct tasklet_struct readlet; /* Tasklet to issue read request. */
92 struct kbd_data *kbd; /* key_maps stuff. */
93
94 /* Escape sequence parsing. */
95 int esc_state, esc_ques, esc_npar;
96 int esc_par[ESCAPE_NPAR];
97 unsigned int saved_cx, saved_cy;
98 unsigned int saved_highlight, saved_f_color;
99
100 /* Command recalling. */
101 struct list_head rcl_lines; /* List of recallable lines. */
102 struct list_head *rcl_walk; /* Point in rcl_lines list. */
103 int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
104
105 /* Character array for put_char/flush_chars. */
106 unsigned int char_count;
107 char char_buf[TTY3270_CHAR_BUF_SIZE];
108};
109
110/* tty3270->update_flags. See tty3270_update for details. */
111#define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
112#define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
113#define TTY_UPDATE_INPUT 4 /* Update input line. */
114#define TTY_UPDATE_STATUS 8 /* Update status line. */
115#define TTY_UPDATE_ALL 15
116
117static void tty3270_update(struct tty3270 *);
118
119/*
120 * Setup timeout for a device. On timeout trigger an update.
121 */
122void
123tty3270_set_timer(struct tty3270 *tp, int expires)
124{
125 if (expires == 0) {
126 if (timer_pending(&tp->timer) && del_timer(&tp->timer))
127 raw3270_put_view(&tp->view);
128 return;
129 }
130 if (timer_pending(&tp->timer) &&
131 mod_timer(&tp->timer, jiffies + expires))
132 return;
133 raw3270_get_view(&tp->view);
134 tp->timer.function = (void (*)(unsigned long)) tty3270_update;
135 tp->timer.data = (unsigned long) tp;
136 tp->timer.expires = jiffies + expires;
137 add_timer(&tp->timer);
138}
139
140/*
141 * The input line are the two last lines of the screen.
142 */
143static void
144tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
145{
146 struct string *line;
147 unsigned int off;
148
149 line = tp->prompt;
150 if (count != 0)
151 line->string[5] = TF_INMDT;
152 else
153 line->string[5] = tp->inattr;
154 if (count > tp->view.cols * 2 - 11)
155 count = tp->view.cols * 2 - 11;
156 memcpy(line->string + 6, input, count);
157 line->string[6 + count] = TO_IC;
158 /* Clear to end of input line. */
159 if (count < tp->view.cols * 2 - 11) {
160 line->string[7 + count] = TO_RA;
161 line->string[10 + count] = 0;
162 off = tp->view.cols * tp->view.rows - 9;
163 raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
164 line->len = 11 + count;
165 } else
166 line->len = 7 + count;
167 tp->update_flags |= TTY_UPDATE_INPUT;
168}
169
170static void
171tty3270_create_prompt(struct tty3270 *tp)
172{
173 static const unsigned char blueprint[] =
174 { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
175 /* empty input string */
176 TO_IC, TO_RA, 0, 0, 0 };
177 struct string *line;
178 unsigned int offset;
179
180 line = alloc_string(&tp->freemem,
181 sizeof(blueprint) + tp->view.cols * 2 - 9);
182 tp->prompt = line;
183 tp->inattr = TF_INPUT;
184 /* Copy blueprint to status line */
185 memcpy(line->string, blueprint, sizeof(blueprint));
186 line->len = sizeof(blueprint);
187 /* Set output offsets. */
188 offset = tp->view.cols * (tp->view.rows - 2);
189 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
190 offset = tp->view.cols * tp->view.rows - 9;
191 raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
192
193 /* Allocate input string for reading. */
194 tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
195}
196
197/*
198 * The status line is the last line of the screen. It shows the string
199 * "Running"/"Holding" in the lower right corner of the screen.
200 */
201static void
202tty3270_update_status(struct tty3270 * tp)
203{
204 char *str;
205
206 str = (tp->nr_up != 0) ? "History" : "Running";
207 memcpy(tp->status->string + 8, str, 7);
208 codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
209 tp->update_flags |= TTY_UPDATE_STATUS;
210}
211
212static void
213tty3270_create_status(struct tty3270 * tp)
214{
215 static const unsigned char blueprint[] =
216 { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
217 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
218 TAC_RESET };
219 struct string *line;
220 unsigned int offset;
221
222 line = alloc_string(&tp->freemem,sizeof(blueprint));
223 tp->status = line;
224 /* Copy blueprint to status line */
225 memcpy(line->string, blueprint, sizeof(blueprint));
226 /* Set address to start of status string (= last 9 characters). */
227 offset = tp->view.cols * tp->view.rows - 9;
228 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
229}
230
231/*
232 * Set output offsets to 3270 datastream fragment of a tty string.
233 * (TO_SBA offset at the start and TO_RA offset at the end of the string)
234 */
235static void
236tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
237{
238 unsigned char *cp;
239
240 raw3270_buffer_address(tp->view.dev, line->string + 1,
241 tp->view.cols * nr);
242 cp = line->string + line->len - 4;
243 if (*cp == TO_RA)
244 raw3270_buffer_address(tp->view.dev, cp + 1,
245 tp->view.cols * (nr + 1));
246}
247
248/*
249 * Rebuild update list to print all lines.
250 */
251static void
252tty3270_rebuild_update(struct tty3270 *tp)
253{
254 struct string *s, *n;
255 int line, nr_up;
256
257 /*
258 * Throw away update list and create a new one,
259 * containing all lines that will fit on the screen.
260 */
261 list_for_each_entry_safe(s, n, &tp->update, update)
262 list_del_init(&s->update);
263 line = tp->view.rows - 3;
264 nr_up = tp->nr_up;
265 list_for_each_entry_reverse(s, &tp->lines, list) {
266 if (nr_up > 0) {
267 nr_up--;
268 continue;
269 }
270 tty3270_update_string(tp, s, line);
271 list_add(&s->update, &tp->update);
272 if (--line < 0)
273 break;
274 }
275 tp->update_flags |= TTY_UPDATE_LIST;
276}
277
278/*
279 * Alloc string for size bytes. If there is not enough room in
280 * freemem, free strings until there is room.
281 */
282static struct string *
283tty3270_alloc_string(struct tty3270 *tp, size_t size)
284{
285 struct string *s, *n;
286
287 s = alloc_string(&tp->freemem, size);
288 if (s)
289 return s;
290 list_for_each_entry_safe(s, n, &tp->lines, list) {
291 BUG_ON(tp->nr_lines <= tp->view.rows - 2);
292 list_del(&s->list);
293 if (!list_empty(&s->update))
294 list_del(&s->update);
295 tp->nr_lines--;
296 if (free_string(&tp->freemem, s) >= size)
297 break;
298 }
299 s = alloc_string(&tp->freemem, size);
300 BUG_ON(!s);
301 if (tp->nr_up != 0 &&
302 tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
303 tp->nr_up = tp->nr_lines - tp->view.rows + 2;
304 tty3270_rebuild_update(tp);
305 tty3270_update_status(tp);
306 }
307 return s;
308}
309
310/*
311 * Add an empty line to the list.
312 */
313static void
314tty3270_blank_line(struct tty3270 *tp)
315{
316 static const unsigned char blueprint[] =
317 { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
318 TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
319 struct string *s;
320
321 s = tty3270_alloc_string(tp, sizeof(blueprint));
322 memcpy(s->string, blueprint, sizeof(blueprint));
323 s->len = sizeof(blueprint);
324 list_add_tail(&s->list, &tp->lines);
325 tp->nr_lines++;
326 if (tp->nr_up != 0)
327 tp->nr_up++;
328}
329
330/*
331 * Write request completion callback.
332 */
333static void
334tty3270_write_callback(struct raw3270_request *rq, void *data)
335{
336 struct tty3270 *tp;
337
338 tp = (struct tty3270 *) rq->view;
339 if (rq->rc != 0) {
340 /* Write wasn't successfull. Refresh all. */
341 tty3270_rebuild_update(tp);
342 tp->update_flags = TTY_UPDATE_ALL;
343 tty3270_set_timer(tp, 1);
344 }
345 raw3270_request_reset(rq);
346 xchg(&tp->write, rq);
347}
348
349/*
350 * Update 3270 display.
351 */
352static void
353tty3270_update(struct tty3270 *tp)
354{
355 static char invalid_sba[2] = { 0xff, 0xff };
356 struct raw3270_request *wrq;
357 unsigned long updated;
358 struct string *s, *n;
359 char *sba, *str;
360 int rc, len;
361
362 wrq = xchg(&tp->write, 0);
363 if (!wrq) {
364 tty3270_set_timer(tp, 1);
365 return;
366 }
367
368 spin_lock(&tp->view.lock);
369 updated = 0;
370 if (tp->update_flags & TTY_UPDATE_ERASE) {
371 /* Use erase write alternate to erase display. */
372 raw3270_request_set_cmd(wrq, TC_EWRITEA);
373 updated |= TTY_UPDATE_ERASE;
374 } else
375 raw3270_request_set_cmd(wrq, TC_WRITE);
376
377 raw3270_request_add_data(wrq, &tp->wcc, 1);
378 tp->wcc = TW_NONE;
379
380 /*
381 * Update status line.
382 */
383 if (tp->update_flags & TTY_UPDATE_STATUS)
384 if (raw3270_request_add_data(wrq, tp->status->string,
385 tp->status->len) == 0)
386 updated |= TTY_UPDATE_STATUS;
387
388 /*
389 * Write input line.
390 */
391 if (tp->update_flags & TTY_UPDATE_INPUT)
392 if (raw3270_request_add_data(wrq, tp->prompt->string,
393 tp->prompt->len) == 0)
394 updated |= TTY_UPDATE_INPUT;
395
396 sba = invalid_sba;
397
398 if (tp->update_flags & TTY_UPDATE_LIST) {
399 /* Write strings in the update list to the screen. */
400 list_for_each_entry_safe(s, n, &tp->update, update) {
401 str = s->string;
402 len = s->len;
403 /*
404 * Skip TO_SBA at the start of the string if the
405 * last output position matches the start address
406 * of this line.
407 */
408 if (s->string[1] == sba[0] && s->string[2] == sba[1])
409 str += 3, len -= 3;
410 if (raw3270_request_add_data(wrq, str, len) != 0)
411 break;
412 list_del_init(&s->update);
413 sba = s->string + s->len - 3;
414 }
415 if (list_empty(&tp->update))
416 updated |= TTY_UPDATE_LIST;
417 }
418 wrq->callback = tty3270_write_callback;
419 rc = raw3270_start(&tp->view, wrq);
420 if (rc == 0) {
421 tp->update_flags &= ~updated;
422 if (tp->update_flags)
423 tty3270_set_timer(tp, 1);
424 } else {
425 raw3270_request_reset(wrq);
426 xchg(&tp->write, wrq);
427 }
428 spin_unlock(&tp->view.lock);
429 raw3270_put_view(&tp->view);
430}
431
432/*
433 * Command recalling.
434 */
435static void
436tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
437{
438 struct string *s;
439
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200440 tp->rcl_walk = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (len <= 0)
442 return;
443 if (tp->rcl_nr >= tp->rcl_max) {
444 s = list_entry(tp->rcl_lines.next, struct string, list);
445 list_del(&s->list);
446 free_string(&tp->freemem, s);
447 tp->rcl_nr--;
448 }
449 s = tty3270_alloc_string(tp, len);
450 memcpy(s->string, input, len);
451 list_add_tail(&s->list, &tp->rcl_lines);
452 tp->rcl_nr++;
453}
454
455static void
456tty3270_rcl_backward(struct kbd_data *kbd)
457{
458 struct tty3270 *tp;
459 struct string *s;
460
461 tp = kbd->tty->driver_data;
462 spin_lock_bh(&tp->view.lock);
463 if (tp->inattr == TF_INPUT) {
464 if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
465 tp->rcl_walk = tp->rcl_walk->prev;
466 else if (!list_empty(&tp->rcl_lines))
467 tp->rcl_walk = tp->rcl_lines.prev;
468 s = tp->rcl_walk ?
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200469 list_entry(tp->rcl_walk, struct string, list) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 if (tp->rcl_walk) {
471 s = list_entry(tp->rcl_walk, struct string, list);
472 tty3270_update_prompt(tp, s->string, s->len);
473 } else
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200474 tty3270_update_prompt(tp, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 tty3270_set_timer(tp, 1);
476 }
477 spin_unlock_bh(&tp->view.lock);
478}
479
480/*
481 * Deactivate tty view.
482 */
483static void
484tty3270_exit_tty(struct kbd_data *kbd)
485{
486 struct tty3270 *tp;
487
488 tp = kbd->tty->driver_data;
489 raw3270_deactivate_view(&tp->view);
490}
491
492/*
493 * Scroll forward in history.
494 */
495static void
496tty3270_scroll_forward(struct kbd_data *kbd)
497{
498 struct tty3270 *tp;
499 int nr_up;
500
501 tp = kbd->tty->driver_data;
502 spin_lock_bh(&tp->view.lock);
503 nr_up = tp->nr_up - tp->view.rows + 2;
504 if (nr_up < 0)
505 nr_up = 0;
506 if (nr_up != tp->nr_up) {
507 tp->nr_up = nr_up;
508 tty3270_rebuild_update(tp);
509 tty3270_update_status(tp);
510 tty3270_set_timer(tp, 1);
511 }
512 spin_unlock_bh(&tp->view.lock);
513}
514
515/*
516 * Scroll backward in history.
517 */
518static void
519tty3270_scroll_backward(struct kbd_data *kbd)
520{
521 struct tty3270 *tp;
522 int nr_up;
523
524 tp = kbd->tty->driver_data;
525 spin_lock_bh(&tp->view.lock);
526 nr_up = tp->nr_up + tp->view.rows - 2;
527 if (nr_up + tp->view.rows - 2 > tp->nr_lines)
528 nr_up = tp->nr_lines - tp->view.rows + 2;
529 if (nr_up != tp->nr_up) {
530 tp->nr_up = nr_up;
531 tty3270_rebuild_update(tp);
532 tty3270_update_status(tp);
533 tty3270_set_timer(tp, 1);
534 }
535 spin_unlock_bh(&tp->view.lock);
536}
537
538/*
539 * Pass input line to tty.
540 */
541static void
542tty3270_read_tasklet(struct raw3270_request *rrq)
543{
544 static char kreset_data = TW_KR;
545 struct tty3270 *tp;
546 char *input;
547 int len;
548
549 tp = (struct tty3270 *) rrq->view;
550 spin_lock_bh(&tp->view.lock);
551 /*
552 * Two AID keys are special: For 0x7d (enter) the input line
553 * has to be emitted to the tty and for 0x6d the screen
554 * needs to be redrawn.
555 */
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200556 input = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 len = 0;
558 if (tp->input->string[0] == 0x7d) {
559 /* Enter: write input to tty. */
560 input = tp->input->string + 6;
561 len = tp->input->len - 6 - rrq->rescnt;
562 if (tp->inattr != TF_INPUTN)
563 tty3270_rcl_add(tp, input, len);
564 if (tp->nr_up > 0) {
565 tp->nr_up = 0;
566 tty3270_rebuild_update(tp);
567 tty3270_update_status(tp);
568 }
569 /* Clear input area. */
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200570 tty3270_update_prompt(tp, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 tty3270_set_timer(tp, 1);
572 } else if (tp->input->string[0] == 0x6d) {
573 /* Display has been cleared. Redraw. */
574 tty3270_rebuild_update(tp);
575 tp->update_flags = TTY_UPDATE_ALL;
576 tty3270_set_timer(tp, 1);
577 }
578 spin_unlock_bh(&tp->view.lock);
579
580 /* Start keyboard reset command. */
581 raw3270_request_reset(tp->kreset);
582 raw3270_request_set_cmd(tp->kreset, TC_WRITE);
583 raw3270_request_add_data(tp->kreset, &kreset_data, 1);
584 raw3270_start(&tp->view, tp->kreset);
585
586 /* Emit input string. */
587 if (tp->tty) {
588 while (len-- > 0)
589 kbd_keycode(tp->kbd, *input++);
590 /* Emit keycode for AID byte. */
591 kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
592 }
593
594 raw3270_request_reset(rrq);
595 xchg(&tp->read, rrq);
596 raw3270_put_view(&tp->view);
597}
598
599/*
600 * Read request completion callback.
601 */
602static void
603tty3270_read_callback(struct raw3270_request *rq, void *data)
604{
605 raw3270_get_view(rq->view);
606 /* Schedule tasklet to pass input to tty. */
607 tasklet_schedule(&((struct tty3270 *) rq->view)->readlet);
608}
609
610/*
611 * Issue a read request. Call with device lock.
612 */
613static void
614tty3270_issue_read(struct tty3270 *tp, int lock)
615{
616 struct raw3270_request *rrq;
617 int rc;
618
619 rrq = xchg(&tp->read, 0);
620 if (!rrq)
621 /* Read already scheduled. */
622 return;
623 rrq->callback = tty3270_read_callback;
624 rrq->callback_data = tp;
625 raw3270_request_set_cmd(rrq, TC_READMOD);
626 raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
627 /* Issue the read modified request. */
628 if (lock) {
629 rc = raw3270_start(&tp->view, rrq);
630 } else
631 rc = raw3270_start_irq(&tp->view, rrq);
632 if (rc) {
633 raw3270_request_reset(rrq);
634 xchg(&tp->read, rrq);
635 }
636}
637
638/*
639 * Switch to the tty view.
640 */
641static int
642tty3270_activate(struct raw3270_view *view)
643{
644 struct tty3270 *tp;
645 unsigned long flags;
646
647 tp = (struct tty3270 *) view;
648 spin_lock_irqsave(&tp->view.lock, flags);
649 tp->nr_up = 0;
650 tty3270_rebuild_update(tp);
651 tty3270_update_status(tp);
652 tp->update_flags = TTY_UPDATE_ALL;
653 tty3270_set_timer(tp, 1);
654 spin_unlock_irqrestore(&tp->view.lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return 0;
656}
657
658static void
659tty3270_deactivate(struct raw3270_view *view)
660{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661}
662
663static int
664tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
665{
666 /* Handle ATTN. Schedule tasklet to read aid. */
667 if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
668 if (!tp->throttle)
669 tty3270_issue_read(tp, 0);
670 else
671 tp->attn = 1;
672 }
673
674 if (rq) {
675 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
676 rq->rc = -EIO;
677 else
678 /* Normal end. Copy residual count. */
679 rq->rescnt = irb->scsw.count;
680 }
681 return RAW3270_IO_DONE;
682}
683
684/*
685 * Allocate tty3270 structure.
686 */
687static struct tty3270 *
688tty3270_alloc_view(void)
689{
690 struct tty3270 *tp;
691 int pages;
692
Eric Sesterhenn88abaab2006-03-24 03:15:31 -0800693 tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 if (!tp)
695 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 tp->freemem_pages =
697 kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
698 if (!tp->freemem_pages)
699 goto out_tp;
700 INIT_LIST_HEAD(&tp->freemem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
702 tp->freemem_pages[pages] = (void *)
703 __get_free_pages(GFP_KERNEL|GFP_DMA, 0);
704 if (!tp->freemem_pages[pages])
705 goto out_pages;
706 add_string_memory(&tp->freemem,
707 tp->freemem_pages[pages], PAGE_SIZE);
708 }
709 tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
Richard Hitted3cb6f2005-10-30 15:00:10 -0800710 if (IS_ERR(tp->write))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 goto out_pages;
712 tp->read = raw3270_request_alloc(0);
Richard Hitted3cb6f2005-10-30 15:00:10 -0800713 if (IS_ERR(tp->read))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 goto out_write;
715 tp->kreset = raw3270_request_alloc(1);
Richard Hitted3cb6f2005-10-30 15:00:10 -0800716 if (IS_ERR(tp->kreset))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 goto out_read;
718 tp->kbd = kbd_alloc();
719 if (!tp->kbd)
720 goto out_reset;
721 return tp;
722
723out_reset:
724 raw3270_request_free(tp->kreset);
725out_read:
726 raw3270_request_free(tp->read);
727out_write:
728 raw3270_request_free(tp->write);
729out_pages:
730 while (pages--)
731 free_pages((unsigned long) tp->freemem_pages[pages], 0);
732 kfree(tp->freemem_pages);
733out_tp:
734 kfree(tp);
735out_err:
736 return ERR_PTR(-ENOMEM);
737}
738
739/*
740 * Free tty3270 structure.
741 */
742static void
743tty3270_free_view(struct tty3270 *tp)
744{
745 int pages;
746
747 kbd_free(tp->kbd);
748 raw3270_request_free(tp->kreset);
749 raw3270_request_free(tp->read);
750 raw3270_request_free(tp->write);
751 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
752 free_pages((unsigned long) tp->freemem_pages[pages], 0);
753 kfree(tp->freemem_pages);
754 kfree(tp);
755}
756
757/*
758 * Allocate tty3270 screen.
759 */
760static int
761tty3270_alloc_screen(struct tty3270 *tp)
762{
763 unsigned long size;
764 int lines;
765
766 size = sizeof(struct tty3270_line) * (tp->view.rows - 2);
Eric Sesterhenn88abaab2006-03-24 03:15:31 -0800767 tp->screen = kzalloc(size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 if (!tp->screen)
769 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 for (lines = 0; lines < tp->view.rows - 2; lines++) {
771 size = sizeof(struct tty3270_cell) * tp->view.cols;
Eric Sesterhenn88abaab2006-03-24 03:15:31 -0800772 tp->screen[lines].cells = kzalloc(size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 if (!tp->screen[lines].cells)
774 goto out_screen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 }
776 return 0;
777out_screen:
778 while (lines--)
779 kfree(tp->screen[lines].cells);
780 kfree(tp->screen);
781out_err:
782 return -ENOMEM;
783}
784
785/*
786 * Free tty3270 screen.
787 */
788static void
789tty3270_free_screen(struct tty3270 *tp)
790{
791 int lines;
792
793 for (lines = 0; lines < tp->view.rows - 2; lines++)
794 kfree(tp->screen[lines].cells);
795 kfree(tp->screen);
796}
797
798/*
799 * Unlink tty3270 data structure from tty.
800 */
801static void
802tty3270_release(struct raw3270_view *view)
803{
804 struct tty3270 *tp;
805 struct tty_struct *tty;
806
807 tp = (struct tty3270 *) view;
808 tty = tp->tty;
809 if (tty) {
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200810 tty->driver_data = NULL;
811 tp->tty = tp->kbd->tty = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 tty_hangup(tty);
813 raw3270_put_view(&tp->view);
814 }
815}
816
817/*
818 * Free tty3270 data structure
819 */
820static void
821tty3270_free(struct raw3270_view *view)
822{
823 tty3270_free_screen((struct tty3270 *) view);
824 tty3270_free_view((struct tty3270 *) view);
825}
826
827/*
828 * Delayed freeing of tty3270 views.
829 */
830static void
831tty3270_del_views(void)
832{
833 struct tty3270 *tp;
834 int i;
835
836 for (i = 0; i < tty3270_max_index; i++) {
Richard Hitted3cb6f2005-10-30 15:00:10 -0800837 tp = (struct tty3270 *)
838 raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 if (!IS_ERR(tp))
840 raw3270_del_view(&tp->view);
841 }
842}
843
844struct raw3270_fn tty3270_fn = {
845 .activate = tty3270_activate,
846 .deactivate = tty3270_deactivate,
847 .intv = (void *) tty3270_irq,
848 .release = tty3270_release,
849 .free = tty3270_free
850};
851
852/*
853 * This routine is called whenever a 3270 tty is opened.
854 */
855static int
856tty3270_open(struct tty_struct *tty, struct file * filp)
857{
858 struct tty3270 *tp;
859 int i, rc;
860
861 if (tty->count > 1)
862 return 0;
863 /* Check if the tty3270 is already there. */
Richard Hitted3cb6f2005-10-30 15:00:10 -0800864 tp = (struct tty3270 *)
865 raw3270_find_view(&tty3270_fn,
866 tty->index + RAW3270_FIRSTMINOR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 if (!IS_ERR(tp)) {
868 tty->driver_data = tp;
869 tty->winsize.ws_row = tp->view.rows - 2;
870 tty->winsize.ws_col = tp->view.cols;
871 tty->low_latency = 0;
872 tp->tty = tty;
873 tp->kbd->tty = tty;
874 tp->inattr = TF_INPUT;
875 return 0;
876 }
877 if (tty3270_max_index < tty->index + 1)
878 tty3270_max_index = tty->index + 1;
879
880 /* Quick exit if there is no device for tty->index. */
881 if (PTR_ERR(tp) == -ENODEV)
882 return -ENODEV;
883
884 /* Allocate tty3270 structure on first open. */
885 tp = tty3270_alloc_view();
886 if (IS_ERR(tp))
887 return PTR_ERR(tp);
888
889 INIT_LIST_HEAD(&tp->lines);
890 INIT_LIST_HEAD(&tp->update);
891 INIT_LIST_HEAD(&tp->rcl_lines);
892 tp->rcl_max = 20;
893 init_timer(&tp->timer);
894 tasklet_init(&tp->readlet,
895 (void (*)(unsigned long)) tty3270_read_tasklet,
896 (unsigned long) tp->read);
897
Richard Hitted3cb6f2005-10-30 15:00:10 -0800898 rc = raw3270_add_view(&tp->view, &tty3270_fn,
899 tty->index + RAW3270_FIRSTMINOR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (rc) {
901 tty3270_free_view(tp);
902 return rc;
903 }
904
905 rc = tty3270_alloc_screen(tp);
906 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 raw3270_put_view(&tp->view);
Richard Hitted3cb6f2005-10-30 15:00:10 -0800908 raw3270_del_view(&tp->view);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 return rc;
910 }
911
912 tp->tty = tty;
913 tty->low_latency = 0;
914 tty->driver_data = tp;
915 tty->winsize.ws_row = tp->view.rows - 2;
916 tty->winsize.ws_col = tp->view.cols;
917
918 tty3270_create_prompt(tp);
919 tty3270_create_status(tp);
920 tty3270_update_status(tp);
921
922 /* Create blank line for every line in the tty output area. */
923 for (i = 0; i < tp->view.rows - 2; i++)
924 tty3270_blank_line(tp);
925
926 tp->kbd->tty = tty;
927 tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
928 tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
929 tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
930 tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
931 kbd_ascebc(tp->kbd, tp->view.ascebc);
932
933 raw3270_activate_view(&tp->view);
934 return 0;
935}
936
937/*
938 * This routine is called when the 3270 tty is closed. We wait
939 * for the remaining request to be completed. Then we clean up.
940 */
941static void
942tty3270_close(struct tty_struct *tty, struct file * filp)
943{
944 struct tty3270 *tp;
945
946 if (tty->count > 1)
947 return;
948 tp = (struct tty3270 *) tty->driver_data;
949 if (tp) {
Heiko Carstensd2c993d2006-07-12 16:41:55 +0200950 tty->driver_data = NULL;
951 tp->tty = tp->kbd->tty = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 raw3270_put_view(&tp->view);
953 }
954}
955
956/*
957 * We always have room.
958 */
959static int
960tty3270_write_room(struct tty_struct *tty)
961{
962 return INT_MAX;
963}
964
965/*
966 * Insert character into the screen at the current position with the
967 * current color and highlight. This function does NOT do cursor movement.
968 */
969static void
970tty3270_put_character(struct tty3270 *tp, char ch)
971{
972 struct tty3270_line *line;
973 struct tty3270_cell *cell;
974
975 line = tp->screen + tp->cy;
976 if (line->len <= tp->cx) {
977 while (line->len < tp->cx) {
978 cell = line->cells + line->len;
979 cell->character = tp->view.ascebc[' '];
980 cell->highlight = tp->highlight;
981 cell->f_color = tp->f_color;
982 line->len++;
983 }
984 line->len++;
985 }
986 cell = line->cells + tp->cx;
987 cell->character = tp->view.ascebc[(unsigned int) ch];
988 cell->highlight = tp->highlight;
989 cell->f_color = tp->f_color;
990}
991
992/*
993 * Convert a tty3270_line to a 3270 data fragment usable for output.
994 */
995static void
996tty3270_convert_line(struct tty3270 *tp, int line_nr)
997{
998 struct tty3270_line *line;
999 struct tty3270_cell *cell;
1000 struct string *s, *n;
1001 unsigned char highlight;
1002 unsigned char f_color;
1003 char *cp;
1004 int flen, i;
1005
1006 /* Determine how long the fragment will be. */
1007 flen = 3; /* Prefix (TO_SBA). */
1008 line = tp->screen + line_nr;
1009 flen += line->len;
1010 highlight = TAX_RESET;
1011 f_color = TAC_RESET;
1012 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1013 if (cell->highlight != highlight) {
1014 flen += 3; /* TO_SA to switch highlight. */
1015 highlight = cell->highlight;
1016 }
1017 if (cell->f_color != f_color) {
1018 flen += 3; /* TO_SA to switch color. */
1019 f_color = cell->f_color;
1020 }
1021 }
1022 if (highlight != TAX_RESET)
1023 flen += 3; /* TO_SA to reset hightlight. */
1024 if (f_color != TAC_RESET)
1025 flen += 3; /* TO_SA to reset color. */
1026 if (line->len < tp->view.cols)
1027 flen += 4; /* Postfix (TO_RA). */
1028
1029 /* Find the line in the list. */
1030 i = tp->view.rows - 2 - line_nr;
1031 list_for_each_entry_reverse(s, &tp->lines, list)
1032 if (--i <= 0)
1033 break;
1034 /*
1035 * Check if the line needs to get reallocated.
1036 */
1037 if (s->len != flen) {
1038 /* Reallocate string. */
1039 n = tty3270_alloc_string(tp, flen);
1040 list_add(&n->list, &s->list);
1041 list_del_init(&s->list);
1042 if (!list_empty(&s->update))
1043 list_del_init(&s->update);
1044 free_string(&tp->freemem, s);
1045 s = n;
1046 }
1047
1048 /* Write 3270 data fragment. */
1049 cp = s->string;
1050 *cp++ = TO_SBA;
1051 *cp++ = 0;
1052 *cp++ = 0;
1053
1054 highlight = TAX_RESET;
1055 f_color = TAC_RESET;
1056 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1057 if (cell->highlight != highlight) {
1058 *cp++ = TO_SA;
1059 *cp++ = TAT_EXTHI;
1060 *cp++ = cell->highlight;
1061 highlight = cell->highlight;
1062 }
1063 if (cell->f_color != f_color) {
1064 *cp++ = TO_SA;
1065 *cp++ = TAT_COLOR;
1066 *cp++ = cell->f_color;
1067 f_color = cell->f_color;
1068 }
1069 *cp++ = cell->character;
1070 }
1071 if (highlight != TAX_RESET) {
1072 *cp++ = TO_SA;
1073 *cp++ = TAT_EXTHI;
1074 *cp++ = TAX_RESET;
1075 }
1076 if (f_color != TAC_RESET) {
1077 *cp++ = TO_SA;
1078 *cp++ = TAT_COLOR;
1079 *cp++ = TAC_RESET;
1080 }
1081 if (line->len < tp->view.cols) {
1082 *cp++ = TO_RA;
1083 *cp++ = 0;
1084 *cp++ = 0;
1085 *cp++ = 0;
1086 }
1087
1088 if (tp->nr_up + line_nr < tp->view.rows - 2) {
1089 /* Line is currently visible on screen. */
1090 tty3270_update_string(tp, s, line_nr);
1091 /* Add line to update list. */
1092 if (list_empty(&s->update)) {
1093 list_add_tail(&s->update, &tp->update);
1094 tp->update_flags |= TTY_UPDATE_LIST;
1095 }
1096 }
1097}
1098
1099/*
1100 * Do carriage return.
1101 */
1102static void
1103tty3270_cr(struct tty3270 *tp)
1104{
1105 tp->cx = 0;
1106}
1107
1108/*
1109 * Do line feed.
1110 */
1111static void
1112tty3270_lf(struct tty3270 *tp)
1113{
1114 struct tty3270_line temp;
1115 int i;
1116
1117 tty3270_convert_line(tp, tp->cy);
1118 if (tp->cy < tp->view.rows - 3) {
1119 tp->cy++;
1120 return;
1121 }
1122 /* Last line just filled up. Add new, blank line. */
1123 tty3270_blank_line(tp);
1124 temp = tp->screen[0];
1125 temp.len = 0;
1126 for (i = 0; i < tp->view.rows - 3; i++)
1127 tp->screen[i] = tp->screen[i+1];
1128 tp->screen[tp->view.rows - 3] = temp;
1129 tty3270_rebuild_update(tp);
1130}
1131
1132static void
1133tty3270_ri(struct tty3270 *tp)
1134{
1135 if (tp->cy > 0) {
1136 tty3270_convert_line(tp, tp->cy);
1137 tp->cy--;
1138 }
1139}
1140
1141/*
1142 * Insert characters at current position.
1143 */
1144static void
1145tty3270_insert_characters(struct tty3270 *tp, int n)
1146{
1147 struct tty3270_line *line;
1148 int k;
1149
1150 line = tp->screen + tp->cy;
1151 while (line->len < tp->cx) {
1152 line->cells[line->len].character = tp->view.ascebc[' '];
1153 line->cells[line->len].highlight = TAX_RESET;
1154 line->cells[line->len].f_color = TAC_RESET;
1155 line->len++;
1156 }
1157 if (n > tp->view.cols - tp->cx)
1158 n = tp->view.cols - tp->cx;
1159 k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
1160 while (k--)
1161 line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
1162 line->len += n;
1163 if (line->len > tp->view.cols)
1164 line->len = tp->view.cols;
1165 while (n-- > 0) {
1166 line->cells[tp->cx + n].character = tp->view.ascebc[' '];
1167 line->cells[tp->cx + n].highlight = tp->highlight;
1168 line->cells[tp->cx + n].f_color = tp->f_color;
1169 }
1170}
1171
1172/*
1173 * Delete characters at current position.
1174 */
1175static void
1176tty3270_delete_characters(struct tty3270 *tp, int n)
1177{
1178 struct tty3270_line *line;
1179 int i;
1180
1181 line = tp->screen + tp->cy;
1182 if (line->len <= tp->cx)
1183 return;
1184 if (line->len - tp->cx <= n) {
1185 line->len = tp->cx;
1186 return;
1187 }
1188 for (i = tp->cx; i + n < line->len; i++)
1189 line->cells[i] = line->cells[i + n];
1190 line->len -= n;
1191}
1192
1193/*
1194 * Erase characters at current position.
1195 */
1196static void
1197tty3270_erase_characters(struct tty3270 *tp, int n)
1198{
1199 struct tty3270_line *line;
1200 struct tty3270_cell *cell;
1201
1202 line = tp->screen + tp->cy;
1203 while (line->len > tp->cx && n-- > 0) {
1204 cell = line->cells + tp->cx++;
1205 cell->character = ' ';
1206 cell->highlight = TAX_RESET;
1207 cell->f_color = TAC_RESET;
1208 }
1209 tp->cx += n;
1210 tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
1211}
1212
1213/*
1214 * Erase line, 3 different cases:
1215 * Esc [ 0 K Erase from current position to end of line inclusive
1216 * Esc [ 1 K Erase from beginning of line to current position inclusive
1217 * Esc [ 2 K Erase entire line (without moving cursor)
1218 */
1219static void
1220tty3270_erase_line(struct tty3270 *tp, int mode)
1221{
1222 struct tty3270_line *line;
1223 struct tty3270_cell *cell;
1224 int i;
1225
1226 line = tp->screen + tp->cy;
1227 if (mode == 0)
1228 line->len = tp->cx;
1229 else if (mode == 1) {
1230 for (i = 0; i < tp->cx; i++) {
1231 cell = line->cells + i;
1232 cell->character = ' ';
1233 cell->highlight = TAX_RESET;
1234 cell->f_color = TAC_RESET;
1235 }
1236 if (line->len <= tp->cx)
1237 line->len = tp->cx + 1;
1238 } else if (mode == 2)
1239 line->len = 0;
1240 tty3270_convert_line(tp, tp->cy);
1241}
1242
1243/*
1244 * Erase display, 3 different cases:
1245 * Esc [ 0 J Erase from current position to bottom of screen inclusive
1246 * Esc [ 1 J Erase from top of screen to current position inclusive
1247 * Esc [ 2 J Erase entire screen (without moving the cursor)
1248 */
1249static void
1250tty3270_erase_display(struct tty3270 *tp, int mode)
1251{
1252 int i;
1253
1254 if (mode == 0) {
1255 tty3270_erase_line(tp, 0);
1256 for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
1257 tp->screen[i].len = 0;
1258 tty3270_convert_line(tp, i);
1259 }
1260 } else if (mode == 1) {
1261 for (i = 0; i < tp->cy; i++) {
1262 tp->screen[i].len = 0;
1263 tty3270_convert_line(tp, i);
1264 }
1265 tty3270_erase_line(tp, 1);
1266 } else if (mode == 2) {
1267 for (i = 0; i < tp->view.rows - 2; i++) {
1268 tp->screen[i].len = 0;
1269 tty3270_convert_line(tp, i);
1270 }
1271 }
1272 tty3270_rebuild_update(tp);
1273}
1274
1275/*
1276 * Set attributes found in an escape sequence.
1277 * Esc [ <attr> ; <attr> ; ... m
1278 */
1279static void
1280tty3270_set_attributes(struct tty3270 *tp)
1281{
1282 static unsigned char f_colors[] = {
1283 TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
1284 TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
1285 };
1286 int i, attr;
1287
1288 for (i = 0; i <= tp->esc_npar; i++) {
1289 attr = tp->esc_par[i];
1290 switch (attr) {
1291 case 0: /* Reset */
1292 tp->highlight = TAX_RESET;
1293 tp->f_color = TAC_RESET;
1294 break;
1295 /* Highlight. */
1296 case 4: /* Start underlining. */
1297 tp->highlight = TAX_UNDER;
1298 break;
1299 case 5: /* Start blink. */
1300 tp->highlight = TAX_BLINK;
1301 break;
1302 case 7: /* Start reverse. */
1303 tp->highlight = TAX_REVER;
1304 break;
1305 case 24: /* End underlining */
1306 if (tp->highlight == TAX_UNDER)
1307 tp->highlight = TAX_RESET;
1308 break;
1309 case 25: /* End blink. */
1310 if (tp->highlight == TAX_BLINK)
1311 tp->highlight = TAX_RESET;
1312 break;
1313 case 27: /* End reverse. */
1314 if (tp->highlight == TAX_REVER)
1315 tp->highlight = TAX_RESET;
1316 break;
1317 /* Foreground color. */
1318 case 30: /* Black */
1319 case 31: /* Red */
1320 case 32: /* Green */
1321 case 33: /* Yellow */
1322 case 34: /* Blue */
1323 case 35: /* Magenta */
1324 case 36: /* Cyan */
1325 case 37: /* White */
1326 case 39: /* Black */
1327 tp->f_color = f_colors[attr - 30];
1328 break;
1329 }
1330 }
1331}
1332
1333static inline int
1334tty3270_getpar(struct tty3270 *tp, int ix)
1335{
1336 return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
1337}
1338
1339static void
1340tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
1341{
1342 tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx));
1343 cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy));
1344 if (cy != tp->cy) {
1345 tty3270_convert_line(tp, tp->cy);
1346 tp->cy = cy;
1347 }
1348}
1349
1350/*
1351 * Process escape sequences. Known sequences:
1352 * Esc 7 Save Cursor Position
1353 * Esc 8 Restore Cursor Position
1354 * Esc [ Pn ; Pn ; .. m Set attributes
1355 * Esc [ Pn ; Pn H Cursor Position
1356 * Esc [ Pn ; Pn f Cursor Position
1357 * Esc [ Pn A Cursor Up
1358 * Esc [ Pn B Cursor Down
1359 * Esc [ Pn C Cursor Forward
1360 * Esc [ Pn D Cursor Backward
1361 * Esc [ Pn G Cursor Horizontal Absolute
1362 * Esc [ Pn X Erase Characters
1363 * Esc [ Ps J Erase in Display
1364 * Esc [ Ps K Erase in Line
1365 * // FIXME: add all the new ones.
1366 *
1367 * Pn is a numeric parameter, a string of zero or more decimal digits.
1368 * Ps is a selective parameter.
1369 */
1370static void
1371tty3270_escape_sequence(struct tty3270 *tp, char ch)
1372{
1373 enum { ESnormal, ESesc, ESsquare, ESgetpars };
1374
1375 if (tp->esc_state == ESnormal) {
1376 if (ch == 0x1b)
1377 /* Starting new escape sequence. */
1378 tp->esc_state = ESesc;
1379 return;
1380 }
1381 if (tp->esc_state == ESesc) {
1382 tp->esc_state = ESnormal;
1383 switch (ch) {
1384 case '[':
1385 tp->esc_state = ESsquare;
1386 break;
1387 case 'E':
1388 tty3270_cr(tp);
1389 tty3270_lf(tp);
1390 break;
1391 case 'M':
1392 tty3270_ri(tp);
1393 break;
1394 case 'D':
1395 tty3270_lf(tp);
1396 break;
1397 case 'Z': /* Respond ID. */
1398 kbd_puts_queue(tp->tty, "\033[?6c");
1399 break;
1400 case '7': /* Save cursor position. */
1401 tp->saved_cx = tp->cx;
1402 tp->saved_cy = tp->cy;
1403 tp->saved_highlight = tp->highlight;
1404 tp->saved_f_color = tp->f_color;
1405 break;
1406 case '8': /* Restore cursor position. */
1407 tty3270_convert_line(tp, tp->cy);
1408 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1409 tp->highlight = tp->saved_highlight;
1410 tp->f_color = tp->saved_f_color;
1411 break;
1412 case 'c': /* Reset terminal. */
1413 tp->cx = tp->saved_cx = 0;
1414 tp->cy = tp->saved_cy = 0;
1415 tp->highlight = tp->saved_highlight = TAX_RESET;
1416 tp->f_color = tp->saved_f_color = TAC_RESET;
1417 tty3270_erase_display(tp, 2);
1418 break;
1419 }
1420 return;
1421 }
1422 if (tp->esc_state == ESsquare) {
1423 tp->esc_state = ESgetpars;
1424 memset(tp->esc_par, 0, sizeof(tp->esc_par));
1425 tp->esc_npar = 0;
1426 tp->esc_ques = (ch == '?');
1427 if (tp->esc_ques)
1428 return;
1429 }
1430 if (tp->esc_state == ESgetpars) {
1431 if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
1432 tp->esc_npar++;
1433 return;
1434 }
1435 if (ch >= '0' && ch <= '9') {
1436 tp->esc_par[tp->esc_npar] *= 10;
1437 tp->esc_par[tp->esc_npar] += ch - '0';
1438 return;
1439 }
1440 }
1441 tp->esc_state = ESnormal;
1442 if (ch == 'n' && !tp->esc_ques) {
1443 if (tp->esc_par[0] == 5) /* Status report. */
1444 kbd_puts_queue(tp->tty, "\033[0n");
1445 else if (tp->esc_par[0] == 6) { /* Cursor report. */
1446 char buf[40];
1447 sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
1448 kbd_puts_queue(tp->tty, buf);
1449 }
1450 return;
1451 }
1452 if (tp->esc_ques)
1453 return;
1454 switch (ch) {
1455 case 'm':
1456 tty3270_set_attributes(tp);
1457 break;
1458 case 'H': /* Set cursor position. */
1459 case 'f':
1460 tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
1461 tty3270_getpar(tp, 0) - 1);
1462 break;
1463 case 'd': /* Set y position. */
1464 tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
1465 break;
1466 case 'A': /* Cursor up. */
1467 case 'F':
1468 tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
1469 break;
1470 case 'B': /* Cursor down. */
1471 case 'e':
1472 case 'E':
1473 tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
1474 break;
1475 case 'C': /* Cursor forward. */
1476 case 'a':
1477 tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
1478 break;
1479 case 'D': /* Cursor backward. */
1480 tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
1481 break;
1482 case 'G': /* Set x position. */
1483 case '`':
1484 tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
1485 break;
1486 case 'X': /* Erase Characters. */
1487 tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
1488 break;
1489 case 'J': /* Erase display. */
1490 tty3270_erase_display(tp, tp->esc_par[0]);
1491 break;
1492 case 'K': /* Erase line. */
1493 tty3270_erase_line(tp, tp->esc_par[0]);
1494 break;
1495 case 'P': /* Delete characters. */
1496 tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
1497 break;
1498 case '@': /* Insert characters. */
1499 tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
1500 break;
1501 case 's': /* Save cursor position. */
1502 tp->saved_cx = tp->cx;
1503 tp->saved_cy = tp->cy;
1504 tp->saved_highlight = tp->highlight;
1505 tp->saved_f_color = tp->f_color;
1506 break;
1507 case 'u': /* Restore cursor position. */
1508 tty3270_convert_line(tp, tp->cy);
1509 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1510 tp->highlight = tp->saved_highlight;
1511 tp->f_color = tp->saved_f_color;
1512 break;
1513 }
1514}
1515
1516/*
1517 * String write routine for 3270 ttys
1518 */
1519static void
1520tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count)
1521{
1522 int i_msg, i;
1523
1524 spin_lock_bh(&tp->view.lock);
1525 for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) {
1526 if (tp->esc_state != 0) {
1527 /* Continue escape sequence. */
1528 tty3270_escape_sequence(tp, buf[i_msg]);
1529 continue;
1530 }
1531
1532 switch (buf[i_msg]) {
1533 case 0x07: /* '\a' -- Alarm */
1534 tp->wcc |= TW_PLUSALARM;
1535 break;
1536 case 0x08: /* Backspace. */
1537 if (tp->cx > 0) {
1538 tp->cx--;
1539 tty3270_put_character(tp, ' ');
1540 }
1541 break;
1542 case 0x09: /* '\t' -- Tabulate */
1543 for (i = tp->cx % 8; i < 8; i++) {
1544 if (tp->cx >= tp->view.cols) {
1545 tty3270_cr(tp);
1546 tty3270_lf(tp);
1547 break;
1548 }
1549 tty3270_put_character(tp, ' ');
1550 tp->cx++;
1551 }
1552 break;
1553 case 0x0a: /* '\n' -- New Line */
1554 tty3270_cr(tp);
1555 tty3270_lf(tp);
1556 break;
1557 case 0x0c: /* '\f' -- Form Feed */
1558 tty3270_erase_display(tp, 2);
1559 tp->cx = tp->cy = 0;
1560 break;
1561 case 0x0d: /* '\r' -- Carriage Return */
1562 tp->cx = 0;
1563 break;
1564 case 0x0f: /* SuSE "exit alternate mode" */
1565 break;
1566 case 0x1b: /* Start escape sequence. */
1567 tty3270_escape_sequence(tp, buf[i_msg]);
1568 break;
1569 default: /* Insert normal character. */
1570 if (tp->cx >= tp->view.cols) {
1571 tty3270_cr(tp);
1572 tty3270_lf(tp);
1573 }
1574 tty3270_put_character(tp, buf[i_msg]);
1575 tp->cx++;
1576 break;
1577 }
1578 }
1579 /* Convert current line to 3270 data fragment. */
1580 tty3270_convert_line(tp, tp->cy);
1581
1582 /* Setup timer to update display after 1/10 second */
1583 if (!timer_pending(&tp->timer))
1584 tty3270_set_timer(tp, HZ/10);
1585
1586 spin_unlock_bh(&tp->view.lock);
1587}
1588
1589/*
1590 * String write routine for 3270 ttys
1591 */
1592static int
1593tty3270_write(struct tty_struct * tty,
1594 const unsigned char *buf, int count)
1595{
1596 struct tty3270 *tp;
1597
1598 tp = tty->driver_data;
1599 if (!tp)
1600 return 0;
1601 if (tp->char_count > 0) {
1602 tty3270_do_write(tp, tp->char_buf, tp->char_count);
1603 tp->char_count = 0;
1604 }
1605 tty3270_do_write(tp, buf, count);
1606 return count;
1607}
1608
1609/*
1610 * Put single characters to the ttys character buffer
1611 */
1612static void
1613tty3270_put_char(struct tty_struct *tty, unsigned char ch)
1614{
1615 struct tty3270 *tp;
1616
1617 tp = tty->driver_data;
1618 if (!tp)
1619 return;
1620 if (tp->char_count < TTY3270_CHAR_BUF_SIZE)
1621 tp->char_buf[tp->char_count++] = ch;
1622}
1623
1624/*
1625 * Flush all characters from the ttys characeter buffer put there
1626 * by tty3270_put_char.
1627 */
1628static void
1629tty3270_flush_chars(struct tty_struct *tty)
1630{
1631 struct tty3270 *tp;
1632
1633 tp = tty->driver_data;
1634 if (!tp)
1635 return;
1636 if (tp->char_count > 0) {
1637 tty3270_do_write(tp, tp->char_buf, tp->char_count);
1638 tp->char_count = 0;
1639 }
1640}
1641
1642/*
1643 * Returns the number of characters in the output buffer. This is
1644 * used in tty_wait_until_sent to wait until all characters have
1645 * appeared on the screen.
1646 */
1647static int
1648tty3270_chars_in_buffer(struct tty_struct *tty)
1649{
1650 return 0;
1651}
1652
1653static void
1654tty3270_flush_buffer(struct tty_struct *tty)
1655{
1656}
1657
1658/*
1659 * Check for visible/invisible input switches
1660 */
1661static void
1662tty3270_set_termios(struct tty_struct *tty, struct termios *old)
1663{
1664 struct tty3270 *tp;
1665 int new;
1666
1667 tp = tty->driver_data;
1668 if (!tp)
1669 return;
1670 spin_lock_bh(&tp->view.lock);
1671 if (L_ICANON(tty)) {
1672 new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
1673 if (new != tp->inattr) {
1674 tp->inattr = new;
Heiko Carstensd2c993d2006-07-12 16:41:55 +02001675 tty3270_update_prompt(tp, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 tty3270_set_timer(tp, 1);
1677 }
1678 }
1679 spin_unlock_bh(&tp->view.lock);
1680}
1681
1682/*
1683 * Disable reading from a 3270 tty
1684 */
1685static void
1686tty3270_throttle(struct tty_struct * tty)
1687{
1688 struct tty3270 *tp;
1689
1690 tp = tty->driver_data;
1691 if (!tp)
1692 return;
1693 tp->throttle = 1;
1694}
1695
1696/*
1697 * Enable reading from a 3270 tty
1698 */
1699static void
1700tty3270_unthrottle(struct tty_struct * tty)
1701{
1702 struct tty3270 *tp;
1703
1704 tp = tty->driver_data;
1705 if (!tp)
1706 return;
1707 tp->throttle = 0;
1708 if (tp->attn)
1709 tty3270_issue_read(tp, 1);
1710}
1711
1712/*
1713 * Hang up the tty device.
1714 */
1715static void
1716tty3270_hangup(struct tty_struct *tty)
1717{
1718 // FIXME: implement
1719}
1720
1721static void
1722tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
1723{
1724}
1725
1726static int
1727tty3270_ioctl(struct tty_struct *tty, struct file *file,
1728 unsigned int cmd, unsigned long arg)
1729{
1730 struct tty3270 *tp;
1731
1732 tp = tty->driver_data;
1733 if (!tp)
1734 return -ENODEV;
1735 if (tty->flags & (1 << TTY_IO_ERROR))
1736 return -EIO;
1737 return kbd_ioctl(tp->kbd, file, cmd, arg);
1738}
1739
Jeff Dikeb68e31d2006-10-02 02:17:18 -07001740static const struct tty_operations tty3270_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 .open = tty3270_open,
1742 .close = tty3270_close,
1743 .write = tty3270_write,
1744 .put_char = tty3270_put_char,
1745 .flush_chars = tty3270_flush_chars,
1746 .write_room = tty3270_write_room,
1747 .chars_in_buffer = tty3270_chars_in_buffer,
1748 .flush_buffer = tty3270_flush_buffer,
1749 .throttle = tty3270_throttle,
1750 .unthrottle = tty3270_unthrottle,
1751 .hangup = tty3270_hangup,
1752 .wait_until_sent = tty3270_wait_until_sent,
1753 .ioctl = tty3270_ioctl,
1754 .set_termios = tty3270_set_termios
1755};
1756
1757void
1758tty3270_notifier(int index, int active)
1759{
1760 if (active)
Heiko Carstensd2c993d2006-07-12 16:41:55 +02001761 tty_register_device(tty3270_driver, index, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 else
1763 tty_unregister_device(tty3270_driver, index);
1764}
1765
1766/*
1767 * 3270 tty registration code called from tty_init().
1768 * Most kernel services (incl. kmalloc) are available at this poimt.
1769 */
1770int __init
1771tty3270_init(void)
1772{
1773 struct tty_driver *driver;
1774 int ret;
1775
Richard Hitted3cb6f2005-10-30 15:00:10 -08001776 driver = alloc_tty_driver(RAW3270_MAXDEVS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 if (!driver)
1778 return -ENOMEM;
1779
1780 /*
1781 * Initialize the tty_driver structure
1782 * Entries in tty3270_driver that are NOT initialized:
1783 * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
1784 */
1785 driver->owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 driver->driver_name = "ttyTUB";
1787 driver->name = "ttyTUB";
1788 driver->major = IBM_TTY3270_MAJOR;
Richard Hitted3cb6f2005-10-30 15:00:10 -08001789 driver->minor_start = RAW3270_FIRSTMINOR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 driver->type = TTY_DRIVER_TYPE_SYSTEM;
1791 driver->subtype = SYSTEM_TYPE_TTY;
1792 driver->init_termios = tty_std_termios;
Greg Kroah-Hartman331b8312005-06-20 21:15:16 -07001793 driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 tty_set_operations(driver, &tty3270_ops);
1795 ret = tty_register_driver(driver);
1796 if (ret) {
1797 printk(KERN_ERR "tty3270 registration failed with %d\n", ret);
1798 put_tty_driver(driver);
1799 return ret;
1800 }
1801 tty3270_driver = driver;
1802 ret = raw3270_register_notifier(tty3270_notifier);
1803 if (ret) {
1804 printk(KERN_ERR "tty3270 notifier registration failed "
1805 "with %d\n", ret);
1806 put_tty_driver(driver);
1807 return ret;
1808
1809 }
1810 return 0;
1811}
1812
1813static void __exit
1814tty3270_exit(void)
1815{
1816 struct tty_driver *driver;
1817
1818 raw3270_unregister_notifier(tty3270_notifier);
1819 driver = tty3270_driver;
Heiko Carstensd2c993d2006-07-12 16:41:55 +02001820 tty3270_driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 tty_unregister_driver(driver);
1822 tty3270_del_views();
1823}
1824
1825MODULE_LICENSE("GPL");
1826MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
1827
1828module_init(tty3270_init);
1829module_exit(tty3270_exit);