1 // SPDX-License-Identifier: GPL-2.0
3 * IBM/3270 Driver - tty functions.
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 IBM Corp. 2003
11 #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 #include <linux/workqueue.h>
21 #include <linux/slab.h>
22 #include <linux/bootmem.h>
23 #include <linux/compat.h>
25 #include <asm/ccwdev.h>
27 #include <asm/ebcdic.h>
28 #include <linux/uaccess.h>
34 #define TTY3270_CHAR_BUF_SIZE 256
35 #define TTY3270_OUTPUT_BUFFER_SIZE 1024
36 #define TTY3270_STRING_PAGES 5
38 struct tty_driver *tty3270_driver;
39 static int tty3270_max_index;
41 static struct raw3270_fn tty3270_fn;
44 unsigned char character;
45 unsigned char highlight;
46 unsigned char f_color;
50 struct tty3270_cell *cells;
57 * The main tty view data structure.
59 * 1) describe line orientation & lines list concept against screen
60 * 2) describe conversion of screen to lines
61 * 3) describe line format.
64 struct raw3270_view view;
66 void **freemem_pages; /* Array of pages used for freemem. */
67 struct list_head freemem; /* List of free memory for strings. */
70 struct list_head lines; /* List of lines. */
71 struct list_head update; /* List of lines to update. */
72 unsigned char wcc; /* Write control character. */
73 int nr_lines; /* # lines in list. */
74 int nr_up; /* # lines up in history. */
75 unsigned long update_flags; /* Update indication bits. */
76 struct string *status; /* Lower right of display. */
77 struct raw3270_request *write; /* Single write request. */
78 struct timer_list timer; /* Output delay timer. */
80 /* Current tty screen. */
81 unsigned int cx, cy; /* Current output position. */
82 unsigned int highlight; /* Blink/reverse/underscore */
83 unsigned int f_color; /* Foreground color */
84 struct tty3270_line *screen;
85 unsigned int n_model, n_cols, n_rows; /* New model & size */
86 struct work_struct resize_work;
89 struct string *prompt; /* Output string for input area. */
90 struct string *input; /* Input string for read request. */
91 struct raw3270_request *read; /* Single read request. */
92 struct raw3270_request *kreset; /* Single keyboard reset request. */
93 unsigned char inattr; /* Visible/invisible input. */
94 int throttle, attn; /* tty throttle/unthrottle. */
95 struct tasklet_struct readlet; /* Tasklet to issue read request. */
96 struct tasklet_struct hanglet; /* Tasklet to hang up the tty. */
97 struct kbd_data *kbd; /* key_maps stuff. */
99 /* Escape sequence parsing. */
100 int esc_state, esc_ques, esc_npar;
101 int esc_par[ESCAPE_NPAR];
102 unsigned int saved_cx, saved_cy;
103 unsigned int saved_highlight, saved_f_color;
105 /* Command recalling. */
106 struct list_head rcl_lines; /* List of recallable lines. */
107 struct list_head *rcl_walk; /* Point in rcl_lines list. */
108 int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
110 /* Character array for put_char/flush_chars. */
111 unsigned int char_count;
112 char char_buf[TTY3270_CHAR_BUF_SIZE];
115 /* tty3270->update_flags. See tty3270_update for details. */
116 #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
117 #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
118 #define TTY_UPDATE_INPUT 4 /* Update input line. */
119 #define TTY_UPDATE_STATUS 8 /* Update status line. */
120 #define TTY_UPDATE_ALL 16 /* Recreate screen. */
122 static void tty3270_update(struct timer_list *);
123 static void tty3270_resize_work(struct work_struct *work);
126 * Setup timeout for a device. On timeout trigger an update.
128 static void tty3270_set_timer(struct tty3270 *tp, int expires)
130 mod_timer(&tp->timer, jiffies + expires);
134 * The input line are the two last lines of the screen.
137 tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
144 line->string[5] = TF_INMDT;
146 line->string[5] = tp->inattr;
147 if (count > tp->view.cols * 2 - 11)
148 count = tp->view.cols * 2 - 11;
149 memcpy(line->string + 6, input, count);
150 line->string[6 + count] = TO_IC;
151 /* Clear to end of input line. */
152 if (count < tp->view.cols * 2 - 11) {
153 line->string[7 + count] = TO_RA;
154 line->string[10 + count] = 0;
155 off = tp->view.cols * tp->view.rows - 9;
156 raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
157 line->len = 11 + count;
159 line->len = 7 + count;
160 tp->update_flags |= TTY_UPDATE_INPUT;
164 tty3270_create_prompt(struct tty3270 *tp)
166 static const unsigned char blueprint[] =
167 { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
168 /* empty input string */
169 TO_IC, TO_RA, 0, 0, 0 };
173 line = alloc_string(&tp->freemem,
174 sizeof(blueprint) + tp->view.cols * 2 - 9);
176 tp->inattr = TF_INPUT;
177 /* Copy blueprint to status line */
178 memcpy(line->string, blueprint, sizeof(blueprint));
179 line->len = sizeof(blueprint);
180 /* Set output offsets. */
181 offset = tp->view.cols * (tp->view.rows - 2);
182 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
183 offset = tp->view.cols * tp->view.rows - 9;
184 raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
186 /* Allocate input string for reading. */
187 tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
191 * The status line is the last line of the screen. It shows the string
192 * "Running"/"Holding" in the lower right corner of the screen.
195 tty3270_update_status(struct tty3270 * tp)
199 str = (tp->nr_up != 0) ? "History" : "Running";
200 memcpy(tp->status->string + 8, str, 7);
201 codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
202 tp->update_flags |= TTY_UPDATE_STATUS;
206 tty3270_create_status(struct tty3270 * tp)
208 static const unsigned char blueprint[] =
209 { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
210 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
215 line = alloc_string(&tp->freemem,sizeof(blueprint));
217 /* Copy blueprint to status line */
218 memcpy(line->string, blueprint, sizeof(blueprint));
219 /* Set address to start of status string (= last 9 characters). */
220 offset = tp->view.cols * tp->view.rows - 9;
221 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
225 * Set output offsets to 3270 datastream fragment of a tty string.
226 * (TO_SBA offset at the start and TO_RA offset at the end of the string)
229 tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
233 raw3270_buffer_address(tp->view.dev, line->string + 1,
235 cp = line->string + line->len - 4;
237 raw3270_buffer_address(tp->view.dev, cp + 1,
238 tp->view.cols * (nr + 1));
242 * Rebuild update list to print all lines.
245 tty3270_rebuild_update(struct tty3270 *tp)
247 struct string *s, *n;
251 * Throw away update list and create a new one,
252 * containing all lines that will fit on the screen.
254 list_for_each_entry_safe(s, n, &tp->update, update)
255 list_del_init(&s->update);
256 line = tp->view.rows - 3;
258 list_for_each_entry_reverse(s, &tp->lines, list) {
263 tty3270_update_string(tp, s, line);
264 list_add(&s->update, &tp->update);
268 tp->update_flags |= TTY_UPDATE_LIST;
272 * Alloc string for size bytes. If there is not enough room in
273 * freemem, free strings until there is room.
275 static struct string *
276 tty3270_alloc_string(struct tty3270 *tp, size_t size)
278 struct string *s, *n;
280 s = alloc_string(&tp->freemem, size);
283 list_for_each_entry_safe(s, n, &tp->lines, list) {
284 BUG_ON(tp->nr_lines <= tp->view.rows - 2);
286 if (!list_empty(&s->update))
287 list_del(&s->update);
289 if (free_string(&tp->freemem, s) >= size)
292 s = alloc_string(&tp->freemem, size);
294 if (tp->nr_up != 0 &&
295 tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
296 tp->nr_up = tp->nr_lines - tp->view.rows + 2;
297 tty3270_rebuild_update(tp);
298 tty3270_update_status(tp);
304 * Add an empty line to the list.
307 tty3270_blank_line(struct tty3270 *tp)
309 static const unsigned char blueprint[] =
310 { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
311 TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
314 s = tty3270_alloc_string(tp, sizeof(blueprint));
315 memcpy(s->string, blueprint, sizeof(blueprint));
316 s->len = sizeof(blueprint);
317 list_add_tail(&s->list, &tp->lines);
324 * Create a blank screen and remove all lines from the history.
327 tty3270_blank_screen(struct tty3270 *tp)
329 struct string *s, *n;
332 for (i = 0; i < tp->view.rows - 2; i++)
333 tp->screen[i].len = 0;
335 list_for_each_entry_safe(s, n, &tp->lines, list) {
337 if (!list_empty(&s->update))
338 list_del(&s->update);
340 free_string(&tp->freemem, s);
345 * Write request completion callback.
348 tty3270_write_callback(struct raw3270_request *rq, void *data)
350 struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
353 /* Write wasn't successful. Refresh all. */
354 tp->update_flags = TTY_UPDATE_ALL;
355 tty3270_set_timer(tp, 1);
357 raw3270_request_reset(rq);
358 xchg(&tp->write, rq);
362 * Update 3270 display.
365 tty3270_update(struct timer_list *t)
367 struct tty3270 *tp = from_timer(tp, t, timer);
368 static char invalid_sba[2] = { 0xff, 0xff };
369 struct raw3270_request *wrq;
370 unsigned long updated;
371 struct string *s, *n;
375 wrq = xchg(&tp->write, 0);
377 tty3270_set_timer(tp, 1);
381 spin_lock(&tp->view.lock);
383 if (tp->update_flags & TTY_UPDATE_ALL) {
384 tty3270_rebuild_update(tp);
385 tty3270_update_status(tp);
386 tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
387 TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
389 if (tp->update_flags & TTY_UPDATE_ERASE) {
390 /* Use erase write alternate to erase display. */
391 raw3270_request_set_cmd(wrq, TC_EWRITEA);
392 updated |= TTY_UPDATE_ERASE;
394 raw3270_request_set_cmd(wrq, TC_WRITE);
396 raw3270_request_add_data(wrq, &tp->wcc, 1);
400 * Update status line.
402 if (tp->update_flags & TTY_UPDATE_STATUS)
403 if (raw3270_request_add_data(wrq, tp->status->string,
404 tp->status->len) == 0)
405 updated |= TTY_UPDATE_STATUS;
410 if (tp->update_flags & TTY_UPDATE_INPUT)
411 if (raw3270_request_add_data(wrq, tp->prompt->string,
412 tp->prompt->len) == 0)
413 updated |= TTY_UPDATE_INPUT;
417 if (tp->update_flags & TTY_UPDATE_LIST) {
418 /* Write strings in the update list to the screen. */
419 list_for_each_entry_safe(s, n, &tp->update, update) {
423 * Skip TO_SBA at the start of the string if the
424 * last output position matches the start address
427 if (s->string[1] == sba[0] && s->string[2] == sba[1])
429 if (raw3270_request_add_data(wrq, str, len) != 0)
431 list_del_init(&s->update);
432 if (s->string[s->len - 4] == TO_RA)
433 sba = s->string + s->len - 3;
437 if (list_empty(&tp->update))
438 updated |= TTY_UPDATE_LIST;
440 wrq->callback = tty3270_write_callback;
441 rc = raw3270_start(&tp->view, wrq);
443 tp->update_flags &= ~updated;
444 if (tp->update_flags)
445 tty3270_set_timer(tp, 1);
447 raw3270_request_reset(wrq);
448 xchg(&tp->write, wrq);
450 spin_unlock(&tp->view.lock);
457 tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
464 if (tp->rcl_nr >= tp->rcl_max) {
465 s = list_entry(tp->rcl_lines.next, struct string, list);
467 free_string(&tp->freemem, s);
470 s = tty3270_alloc_string(tp, len);
471 memcpy(s->string, input, len);
472 list_add_tail(&s->list, &tp->rcl_lines);
477 tty3270_rcl_backward(struct kbd_data *kbd)
479 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
482 spin_lock_bh(&tp->view.lock);
483 if (tp->inattr == TF_INPUT) {
484 if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
485 tp->rcl_walk = tp->rcl_walk->prev;
486 else if (!list_empty(&tp->rcl_lines))
487 tp->rcl_walk = tp->rcl_lines.prev;
489 list_entry(tp->rcl_walk, struct string, list) : NULL;
491 s = list_entry(tp->rcl_walk, struct string, list);
492 tty3270_update_prompt(tp, s->string, s->len);
494 tty3270_update_prompt(tp, NULL, 0);
495 tty3270_set_timer(tp, 1);
497 spin_unlock_bh(&tp->view.lock);
501 * Deactivate tty view.
504 tty3270_exit_tty(struct kbd_data *kbd)
506 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
508 raw3270_deactivate_view(&tp->view);
512 * Scroll forward in history.
515 tty3270_scroll_forward(struct kbd_data *kbd)
517 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
520 spin_lock_bh(&tp->view.lock);
521 nr_up = tp->nr_up - tp->view.rows + 2;
524 if (nr_up != tp->nr_up) {
526 tty3270_rebuild_update(tp);
527 tty3270_update_status(tp);
528 tty3270_set_timer(tp, 1);
530 spin_unlock_bh(&tp->view.lock);
534 * Scroll backward in history.
537 tty3270_scroll_backward(struct kbd_data *kbd)
539 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
542 spin_lock_bh(&tp->view.lock);
543 nr_up = tp->nr_up + tp->view.rows - 2;
544 if (nr_up + tp->view.rows - 2 > tp->nr_lines)
545 nr_up = tp->nr_lines - tp->view.rows + 2;
546 if (nr_up != tp->nr_up) {
548 tty3270_rebuild_update(tp);
549 tty3270_update_status(tp);
550 tty3270_set_timer(tp, 1);
552 spin_unlock_bh(&tp->view.lock);
556 * Pass input line to tty.
559 tty3270_read_tasklet(struct raw3270_request *rrq)
561 static char kreset_data = TW_KR;
562 struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
566 spin_lock_bh(&tp->view.lock);
568 * Two AID keys are special: For 0x7d (enter) the input line
569 * has to be emitted to the tty and for 0x6d the screen
570 * needs to be redrawn.
574 if (tp->input->string[0] == 0x7d) {
575 /* Enter: write input to tty. */
576 input = tp->input->string + 6;
577 len = tp->input->len - 6 - rrq->rescnt;
578 if (tp->inattr != TF_INPUTN)
579 tty3270_rcl_add(tp, input, len);
582 tty3270_rebuild_update(tp);
583 tty3270_update_status(tp);
585 /* Clear input area. */
586 tty3270_update_prompt(tp, NULL, 0);
587 tty3270_set_timer(tp, 1);
588 } else if (tp->input->string[0] == 0x6d) {
589 /* Display has been cleared. Redraw. */
590 tp->update_flags = TTY_UPDATE_ALL;
591 tty3270_set_timer(tp, 1);
593 spin_unlock_bh(&tp->view.lock);
595 /* Start keyboard reset command. */
596 raw3270_request_reset(tp->kreset);
597 raw3270_request_set_cmd(tp->kreset, TC_WRITE);
598 raw3270_request_add_data(tp->kreset, &kreset_data, 1);
599 raw3270_start(&tp->view, tp->kreset);
602 kbd_keycode(tp->kbd, *input++);
603 /* Emit keycode for AID byte. */
604 kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
606 raw3270_request_reset(rrq);
607 xchg(&tp->read, rrq);
608 raw3270_put_view(&tp->view);
612 * Read request completion callback.
615 tty3270_read_callback(struct raw3270_request *rq, void *data)
617 struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
618 raw3270_get_view(rq->view);
619 /* Schedule tasklet to pass input to tty. */
620 tasklet_schedule(&tp->readlet);
624 * Issue a read request. Call with device lock.
627 tty3270_issue_read(struct tty3270 *tp, int lock)
629 struct raw3270_request *rrq;
632 rrq = xchg(&tp->read, 0);
634 /* Read already scheduled. */
636 rrq->callback = tty3270_read_callback;
637 rrq->callback_data = tp;
638 raw3270_request_set_cmd(rrq, TC_READMOD);
639 raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
640 /* Issue the read modified request. */
642 rc = raw3270_start(&tp->view, rrq);
644 rc = raw3270_start_irq(&tp->view, rrq);
646 raw3270_request_reset(rrq);
647 xchg(&tp->read, rrq);
655 tty3270_hangup_tasklet(struct tty3270 *tp)
657 tty_port_tty_hangup(&tp->port, true);
658 raw3270_put_view(&tp->view);
662 * Switch to the tty view.
665 tty3270_activate(struct raw3270_view *view)
667 struct tty3270 *tp = container_of(view, struct tty3270, view);
669 tp->update_flags = TTY_UPDATE_ALL;
670 tty3270_set_timer(tp, 1);
675 tty3270_deactivate(struct raw3270_view *view)
677 struct tty3270 *tp = container_of(view, struct tty3270, view);
679 del_timer(&tp->timer);
683 tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
685 /* Handle ATTN. Schedule tasklet to read aid. */
686 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
688 tty3270_issue_read(tp, 0);
694 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
696 raw3270_get_view(&tp->view);
697 tasklet_schedule(&tp->hanglet);
699 /* Normal end. Copy residual count. */
700 rq->rescnt = irb->scsw.cmd.count;
702 } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
703 /* Interrupt without an outstanding request -> update all */
704 tp->update_flags = TTY_UPDATE_ALL;
705 tty3270_set_timer(tp, 1);
710 * Allocate tty3270 structure.
712 static struct tty3270 *
713 tty3270_alloc_view(void)
718 tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
722 kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
723 if (!tp->freemem_pages)
725 INIT_LIST_HEAD(&tp->freemem);
726 INIT_LIST_HEAD(&tp->lines);
727 INIT_LIST_HEAD(&tp->update);
728 INIT_LIST_HEAD(&tp->rcl_lines);
731 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
732 tp->freemem_pages[pages] = (void *)
733 __get_free_pages(GFP_KERNEL|GFP_DMA, 0);
734 if (!tp->freemem_pages[pages])
736 add_string_memory(&tp->freemem,
737 tp->freemem_pages[pages], PAGE_SIZE);
739 tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
740 if (IS_ERR(tp->write))
742 tp->read = raw3270_request_alloc(0);
743 if (IS_ERR(tp->read))
745 tp->kreset = raw3270_request_alloc(1);
746 if (IS_ERR(tp->kreset))
748 tp->kbd = kbd_alloc();
752 tty_port_init(&tp->port);
753 timer_setup(&tp->timer, tty3270_update, 0);
754 tasklet_init(&tp->readlet,
755 (void (*)(unsigned long)) tty3270_read_tasklet,
756 (unsigned long) tp->read);
757 tasklet_init(&tp->hanglet,
758 (void (*)(unsigned long)) tty3270_hangup_tasklet,
760 INIT_WORK(&tp->resize_work, tty3270_resize_work);
765 raw3270_request_free(tp->kreset);
767 raw3270_request_free(tp->read);
769 raw3270_request_free(tp->write);
772 free_pages((unsigned long) tp->freemem_pages[pages], 0);
773 kfree(tp->freemem_pages);
774 tty_port_destroy(&tp->port);
778 return ERR_PTR(-ENOMEM);
782 * Free tty3270 structure.
785 tty3270_free_view(struct tty3270 *tp)
790 raw3270_request_free(tp->kreset);
791 raw3270_request_free(tp->read);
792 raw3270_request_free(tp->write);
793 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
794 free_pages((unsigned long) tp->freemem_pages[pages], 0);
795 kfree(tp->freemem_pages);
796 tty_port_destroy(&tp->port);
801 * Allocate tty3270 screen.
803 static struct tty3270_line *
804 tty3270_alloc_screen(unsigned int rows, unsigned int cols)
806 struct tty3270_line *screen;
810 size = sizeof(struct tty3270_line) * (rows - 2);
811 screen = kzalloc(size, GFP_KERNEL);
814 for (lines = 0; lines < rows - 2; lines++) {
815 size = sizeof(struct tty3270_cell) * cols;
816 screen[lines].cells = kzalloc(size, GFP_KERNEL);
817 if (!screen[lines].cells)
823 kfree(screen[lines].cells);
826 return ERR_PTR(-ENOMEM);
830 * Free tty3270 screen.
833 tty3270_free_screen(struct tty3270_line *screen, unsigned int rows)
837 for (lines = 0; lines < rows - 2; lines++)
838 kfree(screen[lines].cells);
843 * Resize tty3270 screen
845 static void tty3270_resize_work(struct work_struct *work)
847 struct tty3270 *tp = container_of(work, struct tty3270, resize_work);
848 struct tty3270_line *screen, *oscreen;
849 struct tty_struct *tty;
853 screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
856 /* Switch to new output size */
857 spin_lock_bh(&tp->view.lock);
858 tty3270_blank_screen(tp);
859 oscreen = tp->screen;
860 orows = tp->view.rows;
861 tp->view.model = tp->n_model;
862 tp->view.rows = tp->n_rows;
863 tp->view.cols = tp->n_cols;
865 free_string(&tp->freemem, tp->prompt);
866 free_string(&tp->freemem, tp->status);
867 tty3270_create_prompt(tp);
868 tty3270_create_status(tp);
869 while (tp->nr_lines < tp->view.rows - 2)
870 tty3270_blank_line(tp);
871 tp->update_flags = TTY_UPDATE_ALL;
872 spin_unlock_bh(&tp->view.lock);
873 tty3270_free_screen(oscreen, orows);
874 tty3270_set_timer(tp, 1);
875 /* Informat tty layer about new size */
876 tty = tty_port_tty_get(&tp->port);
879 ws.ws_row = tp->view.rows - 2;
880 ws.ws_col = tp->view.cols;
881 tty_do_resize(tty, &ws);
886 tty3270_resize(struct raw3270_view *view, int model, int rows, int cols)
888 struct tty3270 *tp = container_of(view, struct tty3270, view);
890 if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols)
895 schedule_work(&tp->resize_work);
899 * Unlink tty3270 data structure from tty.
902 tty3270_release(struct raw3270_view *view)
904 struct tty3270 *tp = container_of(view, struct tty3270, view);
905 struct tty_struct *tty = tty_port_tty_get(&tp->port);
908 tty->driver_data = NULL;
909 tty_port_tty_set(&tp->port, NULL);
911 raw3270_put_view(&tp->view);
917 * Free tty3270 data structure
920 tty3270_free(struct raw3270_view *view)
922 struct tty3270 *tp = container_of(view, struct tty3270, view);
924 del_timer_sync(&tp->timer);
925 tty3270_free_screen(tp->screen, tp->view.rows);
926 tty3270_free_view(tp);
930 * Delayed freeing of tty3270 views.
933 tty3270_del_views(void)
937 for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) {
938 struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i);
940 raw3270_del_view(view);
944 static struct raw3270_fn tty3270_fn = {
945 .activate = tty3270_activate,
946 .deactivate = tty3270_deactivate,
947 .intv = (void *) tty3270_irq,
948 .release = tty3270_release,
949 .free = tty3270_free,
950 .resize = tty3270_resize
954 * This routine is called whenever a 3270 tty is opened first time.
956 static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
958 struct raw3270_view *view;
962 /* Check if the tty3270 is already there. */
963 view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR);
965 tp = container_of(view, struct tty3270, view);
966 tty->driver_data = tp;
967 tty->winsize.ws_row = tp->view.rows - 2;
968 tty->winsize.ws_col = tp->view.cols;
969 tp->port.low_latency = 0;
970 tp->inattr = TF_INPUT;
973 if (tty3270_max_index < tty->index + 1)
974 tty3270_max_index = tty->index + 1;
976 /* Allocate tty3270 structure on first open. */
977 tp = tty3270_alloc_view();
981 rc = raw3270_add_view(&tp->view, &tty3270_fn,
982 tty->index + RAW3270_FIRSTMINOR);
984 tty3270_free_view(tp);
988 tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols);
989 if (IS_ERR(tp->screen)) {
990 rc = PTR_ERR(tp->screen);
991 raw3270_put_view(&tp->view);
992 raw3270_del_view(&tp->view);
993 tty3270_free_view(tp);
997 tp->port.low_latency = 0;
998 tty->winsize.ws_row = tp->view.rows - 2;
999 tty->winsize.ws_col = tp->view.cols;
1001 tty3270_create_prompt(tp);
1002 tty3270_create_status(tp);
1003 tty3270_update_status(tp);
1005 /* Create blank line for every line in the tty output area. */
1006 for (i = 0; i < tp->view.rows - 2; i++)
1007 tty3270_blank_line(tp);
1009 tp->kbd->port = &tp->port;
1010 tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
1011 tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
1012 tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
1013 tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
1014 kbd_ascebc(tp->kbd, tp->view.ascebc);
1016 raw3270_activate_view(&tp->view);
1019 rc = tty_port_install(&tp->port, driver, tty);
1021 raw3270_put_view(&tp->view);
1025 tty->driver_data = tp;
1031 * This routine is called whenever a 3270 tty is opened.
1034 tty3270_open(struct tty_struct *tty, struct file *filp)
1036 struct tty3270 *tp = tty->driver_data;
1037 struct tty_port *port = &tp->port;
1040 tty_port_tty_set(port, tty);
1045 * This routine is called when the 3270 tty is closed. We wait
1046 * for the remaining request to be completed. Then we clean up.
1049 tty3270_close(struct tty_struct *tty, struct file * filp)
1051 struct tty3270 *tp = tty->driver_data;
1056 tty_port_tty_set(&tp->port, NULL);
1059 static void tty3270_cleanup(struct tty_struct *tty)
1061 struct tty3270 *tp = tty->driver_data;
1064 tty->driver_data = NULL;
1065 raw3270_put_view(&tp->view);
1070 * We always have room.
1073 tty3270_write_room(struct tty_struct *tty)
1079 * Insert character into the screen at the current position with the
1080 * current color and highlight. This function does NOT do cursor movement.
1082 static void tty3270_put_character(struct tty3270 *tp, char ch)
1084 struct tty3270_line *line;
1085 struct tty3270_cell *cell;
1087 line = tp->screen + tp->cy;
1088 if (line->len <= tp->cx) {
1089 while (line->len < tp->cx) {
1090 cell = line->cells + line->len;
1091 cell->character = tp->view.ascebc[' '];
1092 cell->highlight = tp->highlight;
1093 cell->f_color = tp->f_color;
1098 cell = line->cells + tp->cx;
1099 cell->character = tp->view.ascebc[(unsigned int) ch];
1100 cell->highlight = tp->highlight;
1101 cell->f_color = tp->f_color;
1105 * Convert a tty3270_line to a 3270 data fragment usable for output.
1108 tty3270_convert_line(struct tty3270 *tp, int line_nr)
1110 struct tty3270_line *line;
1111 struct tty3270_cell *cell;
1112 struct string *s, *n;
1113 unsigned char highlight;
1114 unsigned char f_color;
1118 /* Determine how long the fragment will be. */
1119 flen = 3; /* Prefix (TO_SBA). */
1120 line = tp->screen + line_nr;
1122 highlight = TAX_RESET;
1123 f_color = TAC_RESET;
1124 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1125 if (cell->highlight != highlight) {
1126 flen += 3; /* TO_SA to switch highlight. */
1127 highlight = cell->highlight;
1129 if (cell->f_color != f_color) {
1130 flen += 3; /* TO_SA to switch color. */
1131 f_color = cell->f_color;
1134 if (highlight != TAX_RESET)
1135 flen += 3; /* TO_SA to reset hightlight. */
1136 if (f_color != TAC_RESET)
1137 flen += 3; /* TO_SA to reset color. */
1138 if (line->len < tp->view.cols)
1139 flen += 4; /* Postfix (TO_RA). */
1141 /* Find the line in the list. */
1142 i = tp->view.rows - 2 - line_nr;
1143 list_for_each_entry_reverse(s, &tp->lines, list)
1147 * Check if the line needs to get reallocated.
1149 if (s->len != flen) {
1150 /* Reallocate string. */
1151 n = tty3270_alloc_string(tp, flen);
1152 list_add(&n->list, &s->list);
1153 list_del_init(&s->list);
1154 if (!list_empty(&s->update))
1155 list_del_init(&s->update);
1156 free_string(&tp->freemem, s);
1160 /* Write 3270 data fragment. */
1166 highlight = TAX_RESET;
1167 f_color = TAC_RESET;
1168 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1169 if (cell->highlight != highlight) {
1172 *cp++ = cell->highlight;
1173 highlight = cell->highlight;
1175 if (cell->f_color != f_color) {
1178 *cp++ = cell->f_color;
1179 f_color = cell->f_color;
1181 *cp++ = cell->character;
1183 if (highlight != TAX_RESET) {
1188 if (f_color != TAC_RESET) {
1193 if (line->len < tp->view.cols) {
1200 if (tp->nr_up + line_nr < tp->view.rows - 2) {
1201 /* Line is currently visible on screen. */
1202 tty3270_update_string(tp, s, line_nr);
1203 /* Add line to update list. */
1204 if (list_empty(&s->update)) {
1205 list_add_tail(&s->update, &tp->update);
1206 tp->update_flags |= TTY_UPDATE_LIST;
1212 * Do carriage return.
1215 tty3270_cr(struct tty3270 *tp)
1224 tty3270_lf(struct tty3270 *tp)
1226 struct tty3270_line temp;
1229 tty3270_convert_line(tp, tp->cy);
1230 if (tp->cy < tp->view.rows - 3) {
1234 /* Last line just filled up. Add new, blank line. */
1235 tty3270_blank_line(tp);
1236 temp = tp->screen[0];
1238 for (i = 0; i < tp->view.rows - 3; i++)
1239 tp->screen[i] = tp->screen[i+1];
1240 tp->screen[tp->view.rows - 3] = temp;
1241 tty3270_rebuild_update(tp);
1245 tty3270_ri(struct tty3270 *tp)
1248 tty3270_convert_line(tp, tp->cy);
1254 * Insert characters at current position.
1257 tty3270_insert_characters(struct tty3270 *tp, int n)
1259 struct tty3270_line *line;
1262 line = tp->screen + tp->cy;
1263 while (line->len < tp->cx) {
1264 line->cells[line->len].character = tp->view.ascebc[' '];
1265 line->cells[line->len].highlight = TAX_RESET;
1266 line->cells[line->len].f_color = TAC_RESET;
1269 if (n > tp->view.cols - tp->cx)
1270 n = tp->view.cols - tp->cx;
1271 k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
1273 line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
1275 if (line->len > tp->view.cols)
1276 line->len = tp->view.cols;
1278 line->cells[tp->cx + n].character = tp->view.ascebc[' '];
1279 line->cells[tp->cx + n].highlight = tp->highlight;
1280 line->cells[tp->cx + n].f_color = tp->f_color;
1285 * Delete characters at current position.
1288 tty3270_delete_characters(struct tty3270 *tp, int n)
1290 struct tty3270_line *line;
1293 line = tp->screen + tp->cy;
1294 if (line->len <= tp->cx)
1296 if (line->len - tp->cx <= n) {
1300 for (i = tp->cx; i + n < line->len; i++)
1301 line->cells[i] = line->cells[i + n];
1306 * Erase characters at current position.
1309 tty3270_erase_characters(struct tty3270 *tp, int n)
1311 struct tty3270_line *line;
1312 struct tty3270_cell *cell;
1314 line = tp->screen + tp->cy;
1315 while (line->len > tp->cx && n-- > 0) {
1316 cell = line->cells + tp->cx++;
1317 cell->character = ' ';
1318 cell->highlight = TAX_RESET;
1319 cell->f_color = TAC_RESET;
1322 tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
1326 * Erase line, 3 different cases:
1327 * Esc [ 0 K Erase from current position to end of line inclusive
1328 * Esc [ 1 K Erase from beginning of line to current position inclusive
1329 * Esc [ 2 K Erase entire line (without moving cursor)
1332 tty3270_erase_line(struct tty3270 *tp, int mode)
1334 struct tty3270_line *line;
1335 struct tty3270_cell *cell;
1338 line = tp->screen + tp->cy;
1341 else if (mode == 1) {
1342 for (i = 0; i < tp->cx; i++) {
1343 cell = line->cells + i;
1344 cell->character = ' ';
1345 cell->highlight = TAX_RESET;
1346 cell->f_color = TAC_RESET;
1348 if (line->len <= tp->cx)
1349 line->len = tp->cx + 1;
1350 } else if (mode == 2)
1352 tty3270_convert_line(tp, tp->cy);
1356 * Erase display, 3 different cases:
1357 * Esc [ 0 J Erase from current position to bottom of screen inclusive
1358 * Esc [ 1 J Erase from top of screen to current position inclusive
1359 * Esc [ 2 J Erase entire screen (without moving the cursor)
1362 tty3270_erase_display(struct tty3270 *tp, int mode)
1367 tty3270_erase_line(tp, 0);
1368 for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
1369 tp->screen[i].len = 0;
1370 tty3270_convert_line(tp, i);
1372 } else if (mode == 1) {
1373 for (i = 0; i < tp->cy; i++) {
1374 tp->screen[i].len = 0;
1375 tty3270_convert_line(tp, i);
1377 tty3270_erase_line(tp, 1);
1378 } else if (mode == 2) {
1379 for (i = 0; i < tp->view.rows - 2; i++) {
1380 tp->screen[i].len = 0;
1381 tty3270_convert_line(tp, i);
1384 tty3270_rebuild_update(tp);
1388 * Set attributes found in an escape sequence.
1389 * Esc [ <attr> ; <attr> ; ... m
1392 tty3270_set_attributes(struct tty3270 *tp)
1394 static unsigned char f_colors[] = {
1395 TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
1396 TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
1400 for (i = 0; i <= tp->esc_npar; i++) {
1401 attr = tp->esc_par[i];
1404 tp->highlight = TAX_RESET;
1405 tp->f_color = TAC_RESET;
1408 case 4: /* Start underlining. */
1409 tp->highlight = TAX_UNDER;
1411 case 5: /* Start blink. */
1412 tp->highlight = TAX_BLINK;
1414 case 7: /* Start reverse. */
1415 tp->highlight = TAX_REVER;
1417 case 24: /* End underlining */
1418 if (tp->highlight == TAX_UNDER)
1419 tp->highlight = TAX_RESET;
1421 case 25: /* End blink. */
1422 if (tp->highlight == TAX_BLINK)
1423 tp->highlight = TAX_RESET;
1425 case 27: /* End reverse. */
1426 if (tp->highlight == TAX_REVER)
1427 tp->highlight = TAX_RESET;
1429 /* Foreground color. */
1430 case 30: /* Black */
1432 case 32: /* Green */
1433 case 33: /* Yellow */
1435 case 35: /* Magenta */
1437 case 37: /* White */
1438 case 39: /* Black */
1439 tp->f_color = f_colors[attr - 30];
1446 tty3270_getpar(struct tty3270 *tp, int ix)
1448 return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
1452 tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
1454 int max_cx = max(0, cx);
1455 int max_cy = max(0, cy);
1457 tp->cx = min_t(int, tp->view.cols - 1, max_cx);
1458 cy = min_t(int, tp->view.rows - 3, max_cy);
1460 tty3270_convert_line(tp, tp->cy);
1466 * Process escape sequences. Known sequences:
1467 * Esc 7 Save Cursor Position
1468 * Esc 8 Restore Cursor Position
1469 * Esc [ Pn ; Pn ; .. m Set attributes
1470 * Esc [ Pn ; Pn H Cursor Position
1471 * Esc [ Pn ; Pn f Cursor Position
1472 * Esc [ Pn A Cursor Up
1473 * Esc [ Pn B Cursor Down
1474 * Esc [ Pn C Cursor Forward
1475 * Esc [ Pn D Cursor Backward
1476 * Esc [ Pn G Cursor Horizontal Absolute
1477 * Esc [ Pn X Erase Characters
1478 * Esc [ Ps J Erase in Display
1479 * Esc [ Ps K Erase in Line
1480 * // FIXME: add all the new ones.
1482 * Pn is a numeric parameter, a string of zero or more decimal digits.
1483 * Ps is a selective parameter.
1486 tty3270_escape_sequence(struct tty3270 *tp, char ch)
1488 enum { ESnormal, ESesc, ESsquare, ESgetpars };
1490 if (tp->esc_state == ESnormal) {
1492 /* Starting new escape sequence. */
1493 tp->esc_state = ESesc;
1496 if (tp->esc_state == ESesc) {
1497 tp->esc_state = ESnormal;
1500 tp->esc_state = ESsquare;
1512 case 'Z': /* Respond ID. */
1513 kbd_puts_queue(&tp->port, "\033[?6c");
1515 case '7': /* Save cursor position. */
1516 tp->saved_cx = tp->cx;
1517 tp->saved_cy = tp->cy;
1518 tp->saved_highlight = tp->highlight;
1519 tp->saved_f_color = tp->f_color;
1521 case '8': /* Restore cursor position. */
1522 tty3270_convert_line(tp, tp->cy);
1523 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1524 tp->highlight = tp->saved_highlight;
1525 tp->f_color = tp->saved_f_color;
1527 case 'c': /* Reset terminal. */
1528 tp->cx = tp->saved_cx = 0;
1529 tp->cy = tp->saved_cy = 0;
1530 tp->highlight = tp->saved_highlight = TAX_RESET;
1531 tp->f_color = tp->saved_f_color = TAC_RESET;
1532 tty3270_erase_display(tp, 2);
1537 if (tp->esc_state == ESsquare) {
1538 tp->esc_state = ESgetpars;
1539 memset(tp->esc_par, 0, sizeof(tp->esc_par));
1541 tp->esc_ques = (ch == '?');
1545 if (tp->esc_state == ESgetpars) {
1546 if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
1550 if (ch >= '0' && ch <= '9') {
1551 tp->esc_par[tp->esc_npar] *= 10;
1552 tp->esc_par[tp->esc_npar] += ch - '0';
1556 tp->esc_state = ESnormal;
1557 if (ch == 'n' && !tp->esc_ques) {
1558 if (tp->esc_par[0] == 5) /* Status report. */
1559 kbd_puts_queue(&tp->port, "\033[0n");
1560 else if (tp->esc_par[0] == 6) { /* Cursor report. */
1562 sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
1563 kbd_puts_queue(&tp->port, buf);
1571 tty3270_set_attributes(tp);
1573 case 'H': /* Set cursor position. */
1575 tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
1576 tty3270_getpar(tp, 0) - 1);
1578 case 'd': /* Set y position. */
1579 tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
1581 case 'A': /* Cursor up. */
1583 tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
1585 case 'B': /* Cursor down. */
1588 tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
1590 case 'C': /* Cursor forward. */
1592 tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
1594 case 'D': /* Cursor backward. */
1595 tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
1597 case 'G': /* Set x position. */
1599 tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
1601 case 'X': /* Erase Characters. */
1602 tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
1604 case 'J': /* Erase display. */
1605 tty3270_erase_display(tp, tp->esc_par[0]);
1607 case 'K': /* Erase line. */
1608 tty3270_erase_line(tp, tp->esc_par[0]);
1610 case 'P': /* Delete characters. */
1611 tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
1613 case '@': /* Insert characters. */
1614 tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
1616 case 's': /* Save cursor position. */
1617 tp->saved_cx = tp->cx;
1618 tp->saved_cy = tp->cy;
1619 tp->saved_highlight = tp->highlight;
1620 tp->saved_f_color = tp->f_color;
1622 case 'u': /* Restore cursor position. */
1623 tty3270_convert_line(tp, tp->cy);
1624 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1625 tp->highlight = tp->saved_highlight;
1626 tp->f_color = tp->saved_f_color;
1632 * String write routine for 3270 ttys
1635 tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
1636 const unsigned char *buf, int count)
1640 spin_lock_bh(&tp->view.lock);
1641 for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) {
1642 if (tp->esc_state != 0) {
1643 /* Continue escape sequence. */
1644 tty3270_escape_sequence(tp, buf[i_msg]);
1648 switch (buf[i_msg]) {
1649 case 0x07: /* '\a' -- Alarm */
1650 tp->wcc |= TW_PLUSALARM;
1652 case 0x08: /* Backspace. */
1655 tty3270_put_character(tp, ' ');
1658 case 0x09: /* '\t' -- Tabulate */
1659 for (i = tp->cx % 8; i < 8; i++) {
1660 if (tp->cx >= tp->view.cols) {
1665 tty3270_put_character(tp, ' ');
1669 case 0x0a: /* '\n' -- New Line */
1673 case 0x0c: /* '\f' -- Form Feed */
1674 tty3270_erase_display(tp, 2);
1675 tp->cx = tp->cy = 0;
1677 case 0x0d: /* '\r' -- Carriage Return */
1680 case 0x0f: /* SuSE "exit alternate mode" */
1682 case 0x1b: /* Start escape sequence. */
1683 tty3270_escape_sequence(tp, buf[i_msg]);
1685 default: /* Insert normal character. */
1686 if (tp->cx >= tp->view.cols) {
1690 tty3270_put_character(tp, buf[i_msg]);
1695 /* Convert current line to 3270 data fragment. */
1696 tty3270_convert_line(tp, tp->cy);
1698 /* Setup timer to update display after 1/10 second */
1699 if (!timer_pending(&tp->timer))
1700 tty3270_set_timer(tp, HZ/10);
1702 spin_unlock_bh(&tp->view.lock);
1706 * String write routine for 3270 ttys
1709 tty3270_write(struct tty_struct * tty,
1710 const unsigned char *buf, int count)
1714 tp = tty->driver_data;
1717 if (tp->char_count > 0) {
1718 tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
1721 tty3270_do_write(tp, tty, buf, count);
1726 * Put single characters to the ttys character buffer
1728 static int tty3270_put_char(struct tty_struct *tty, unsigned char ch)
1732 tp = tty->driver_data;
1733 if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE)
1735 tp->char_buf[tp->char_count++] = ch;
1740 * Flush all characters from the ttys characeter buffer put there
1741 * by tty3270_put_char.
1744 tty3270_flush_chars(struct tty_struct *tty)
1748 tp = tty->driver_data;
1751 if (tp->char_count > 0) {
1752 tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
1758 * Returns the number of characters in the output buffer. This is
1759 * used in tty_wait_until_sent to wait until all characters have
1760 * appeared on the screen.
1763 tty3270_chars_in_buffer(struct tty_struct *tty)
1769 tty3270_flush_buffer(struct tty_struct *tty)
1774 * Check for visible/invisible input switches
1777 tty3270_set_termios(struct tty_struct *tty, struct ktermios *old)
1782 tp = tty->driver_data;
1785 spin_lock_bh(&tp->view.lock);
1786 if (L_ICANON(tty)) {
1787 new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
1788 if (new != tp->inattr) {
1790 tty3270_update_prompt(tp, NULL, 0);
1791 tty3270_set_timer(tp, 1);
1794 spin_unlock_bh(&tp->view.lock);
1798 * Disable reading from a 3270 tty
1801 tty3270_throttle(struct tty_struct * tty)
1805 tp = tty->driver_data;
1812 * Enable reading from a 3270 tty
1815 tty3270_unthrottle(struct tty_struct * tty)
1819 tp = tty->driver_data;
1824 tty3270_issue_read(tp, 1);
1828 * Hang up the tty device.
1831 tty3270_hangup(struct tty_struct *tty)
1835 tp = tty->driver_data;
1838 spin_lock_bh(&tp->view.lock);
1839 tp->cx = tp->saved_cx = 0;
1840 tp->cy = tp->saved_cy = 0;
1841 tp->highlight = tp->saved_highlight = TAX_RESET;
1842 tp->f_color = tp->saved_f_color = TAC_RESET;
1843 tty3270_blank_screen(tp);
1844 while (tp->nr_lines < tp->view.rows - 2)
1845 tty3270_blank_line(tp);
1846 tp->update_flags = TTY_UPDATE_ALL;
1847 spin_unlock_bh(&tp->view.lock);
1848 tty3270_set_timer(tp, 1);
1852 tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
1856 static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
1861 tp = tty->driver_data;
1864 if (tty_io_error(tty))
1866 return kbd_ioctl(tp->kbd, cmd, arg);
1869 #ifdef CONFIG_COMPAT
1870 static long tty3270_compat_ioctl(struct tty_struct *tty,
1871 unsigned int cmd, unsigned long arg)
1875 tp = tty->driver_data;
1878 if (tty_io_error(tty))
1880 return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
1884 static const struct tty_operations tty3270_ops = {
1885 .install = tty3270_install,
1886 .cleanup = tty3270_cleanup,
1887 .open = tty3270_open,
1888 .close = tty3270_close,
1889 .write = tty3270_write,
1890 .put_char = tty3270_put_char,
1891 .flush_chars = tty3270_flush_chars,
1892 .write_room = tty3270_write_room,
1893 .chars_in_buffer = tty3270_chars_in_buffer,
1894 .flush_buffer = tty3270_flush_buffer,
1895 .throttle = tty3270_throttle,
1896 .unthrottle = tty3270_unthrottle,
1897 .hangup = tty3270_hangup,
1898 .wait_until_sent = tty3270_wait_until_sent,
1899 .ioctl = tty3270_ioctl,
1900 #ifdef CONFIG_COMPAT
1901 .compat_ioctl = tty3270_compat_ioctl,
1903 .set_termios = tty3270_set_termios
1906 static void tty3270_create_cb(int minor)
1908 tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL);
1911 static void tty3270_destroy_cb(int minor)
1913 tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR);
1916 static struct raw3270_notifier tty3270_notifier =
1918 .create = tty3270_create_cb,
1919 .destroy = tty3270_destroy_cb,
1923 * 3270 tty registration code called from tty_init().
1924 * Most kernel services (incl. kmalloc) are available at this poimt.
1926 static int __init tty3270_init(void)
1928 struct tty_driver *driver;
1931 driver = tty_alloc_driver(RAW3270_MAXDEVS,
1932 TTY_DRIVER_REAL_RAW |
1933 TTY_DRIVER_DYNAMIC_DEV |
1934 TTY_DRIVER_RESET_TERMIOS);
1936 return PTR_ERR(driver);
1939 * Initialize the tty_driver structure
1940 * Entries in tty3270_driver that are NOT initialized:
1941 * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
1943 driver->driver_name = "tty3270";
1944 driver->name = "3270/tty";
1945 driver->major = IBM_TTY3270_MAJOR;
1946 driver->minor_start = RAW3270_FIRSTMINOR;
1947 driver->name_base = RAW3270_FIRSTMINOR;
1948 driver->type = TTY_DRIVER_TYPE_SYSTEM;
1949 driver->subtype = SYSTEM_TYPE_TTY;
1950 driver->init_termios = tty_std_termios;
1951 tty_set_operations(driver, &tty3270_ops);
1952 ret = tty_register_driver(driver);
1954 put_tty_driver(driver);
1957 tty3270_driver = driver;
1958 raw3270_register_notifier(&tty3270_notifier);
1965 struct tty_driver *driver;
1967 raw3270_unregister_notifier(&tty3270_notifier);
1968 driver = tty3270_driver;
1969 tty3270_driver = NULL;
1970 tty_unregister_driver(driver);
1971 put_tty_driver(driver);
1972 tty3270_del_views();
1975 MODULE_LICENSE("GPL");
1976 MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
1978 module_init(tty3270_init);
1979 module_exit(tty3270_exit);