2 * IBM/3270 Driver - tty functions.
5 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
6 * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * -- Copyright IBM Corp. 2003
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/kdev_t.h>
13 #include <linux/tty.h>
14 #include <linux/vt_kern.h>
15 #include <linux/init.h>
16 #include <linux/console.h>
17 #include <linux/interrupt.h>
18 #include <linux/workqueue.h>
20 #include <linux/slab.h>
21 #include <linux/bootmem.h>
22 #include <linux/compat.h>
24 #include <asm/ccwdev.h>
26 #include <asm/ebcdic.h>
27 #include <asm/uaccess.h>
33 #define TTY3270_CHAR_BUF_SIZE 256
34 #define TTY3270_OUTPUT_BUFFER_SIZE 1024
35 #define TTY3270_STRING_PAGES 5
37 struct tty_driver *tty3270_driver;
38 static int tty3270_max_index;
40 static struct raw3270_fn tty3270_fn;
43 unsigned char character;
44 unsigned char highlight;
45 unsigned char f_color;
49 struct tty3270_cell *cells;
56 * The main tty view data structure.
58 * 1) describe line orientation & lines list concept against screen
59 * 2) describe conversion of screen to lines
60 * 3) describe line format.
63 struct raw3270_view view;
65 void **freemem_pages; /* Array of pages used for freemem. */
66 struct list_head freemem; /* List of free memory for strings. */
69 struct list_head lines; /* List of lines. */
70 struct list_head update; /* List of lines to update. */
71 unsigned char wcc; /* Write control character. */
72 int nr_lines; /* # lines in list. */
73 int nr_up; /* # lines up in history. */
74 unsigned long update_flags; /* Update indication bits. */
75 struct string *status; /* Lower right of display. */
76 struct raw3270_request *write; /* Single write request. */
77 struct timer_list timer; /* Output delay timer. */
79 /* Current tty screen. */
80 unsigned int cx, cy; /* Current output position. */
81 unsigned int highlight; /* Blink/reverse/underscore */
82 unsigned int f_color; /* Foreground color */
83 struct tty3270_line *screen;
84 unsigned int n_model, n_cols, n_rows; /* New model & size */
85 struct work_struct resize_work;
88 struct string *prompt; /* Output string for input area. */
89 struct string *input; /* Input string for read request. */
90 struct raw3270_request *read; /* Single read request. */
91 struct raw3270_request *kreset; /* Single keyboard reset request. */
92 unsigned char inattr; /* Visible/invisible input. */
93 int throttle, attn; /* tty throttle/unthrottle. */
94 struct tasklet_struct readlet; /* Tasklet to issue read request. */
95 struct kbd_data *kbd; /* key_maps stuff. */
97 /* Escape sequence parsing. */
98 int esc_state, esc_ques, esc_npar;
99 int esc_par[ESCAPE_NPAR];
100 unsigned int saved_cx, saved_cy;
101 unsigned int saved_highlight, saved_f_color;
103 /* Command recalling. */
104 struct list_head rcl_lines; /* List of recallable lines. */
105 struct list_head *rcl_walk; /* Point in rcl_lines list. */
106 int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
108 /* Character array for put_char/flush_chars. */
109 unsigned int char_count;
110 char char_buf[TTY3270_CHAR_BUF_SIZE];
113 /* tty3270->update_flags. See tty3270_update for details. */
114 #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
115 #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
116 #define TTY_UPDATE_INPUT 4 /* Update input line. */
117 #define TTY_UPDATE_STATUS 8 /* Update status line. */
118 #define TTY_UPDATE_ALL 16 /* Recreate screen. */
120 static void tty3270_update(struct tty3270 *);
121 static void tty3270_resize_work(struct work_struct *work);
124 * Setup timeout for a device. On timeout trigger an update.
126 static void tty3270_set_timer(struct tty3270 *tp, int expires)
129 del_timer(&tp->timer);
131 mod_timer(&tp->timer, jiffies + expires);
135 * The input line are the two last lines of the screen.
138 tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
145 line->string[5] = TF_INMDT;
147 line->string[5] = tp->inattr;
148 if (count > tp->view.cols * 2 - 11)
149 count = tp->view.cols * 2 - 11;
150 memcpy(line->string + 6, input, count);
151 line->string[6 + count] = TO_IC;
152 /* Clear to end of input line. */
153 if (count < tp->view.cols * 2 - 11) {
154 line->string[7 + count] = TO_RA;
155 line->string[10 + count] = 0;
156 off = tp->view.cols * tp->view.rows - 9;
157 raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
158 line->len = 11 + count;
160 line->len = 7 + count;
161 tp->update_flags |= TTY_UPDATE_INPUT;
165 tty3270_create_prompt(struct tty3270 *tp)
167 static const unsigned char blueprint[] =
168 { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
169 /* empty input string */
170 TO_IC, TO_RA, 0, 0, 0 };
174 line = alloc_string(&tp->freemem,
175 sizeof(blueprint) + tp->view.cols * 2 - 9);
177 tp->inattr = TF_INPUT;
178 /* Copy blueprint to status line */
179 memcpy(line->string, blueprint, sizeof(blueprint));
180 line->len = sizeof(blueprint);
181 /* Set output offsets. */
182 offset = tp->view.cols * (tp->view.rows - 2);
183 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
184 offset = tp->view.cols * tp->view.rows - 9;
185 raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
187 /* Allocate input string for reading. */
188 tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
192 * The status line is the last line of the screen. It shows the string
193 * "Running"/"Holding" in the lower right corner of the screen.
196 tty3270_update_status(struct tty3270 * tp)
200 str = (tp->nr_up != 0) ? "History" : "Running";
201 memcpy(tp->status->string + 8, str, 7);
202 codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
203 tp->update_flags |= TTY_UPDATE_STATUS;
207 tty3270_create_status(struct tty3270 * tp)
209 static const unsigned char blueprint[] =
210 { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
211 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
216 line = alloc_string(&tp->freemem,sizeof(blueprint));
218 /* Copy blueprint to status line */
219 memcpy(line->string, blueprint, sizeof(blueprint));
220 /* Set address to start of status string (= last 9 characters). */
221 offset = tp->view.cols * tp->view.rows - 9;
222 raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
226 * Set output offsets to 3270 datastream fragment of a tty string.
227 * (TO_SBA offset at the start and TO_RA offset at the end of the string)
230 tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
234 raw3270_buffer_address(tp->view.dev, line->string + 1,
236 cp = line->string + line->len - 4;
238 raw3270_buffer_address(tp->view.dev, cp + 1,
239 tp->view.cols * (nr + 1));
243 * Rebuild update list to print all lines.
246 tty3270_rebuild_update(struct tty3270 *tp)
248 struct string *s, *n;
252 * Throw away update list and create a new one,
253 * containing all lines that will fit on the screen.
255 list_for_each_entry_safe(s, n, &tp->update, update)
256 list_del_init(&s->update);
257 line = tp->view.rows - 3;
259 list_for_each_entry_reverse(s, &tp->lines, list) {
264 tty3270_update_string(tp, s, line);
265 list_add(&s->update, &tp->update);
269 tp->update_flags |= TTY_UPDATE_LIST;
273 * Alloc string for size bytes. If there is not enough room in
274 * freemem, free strings until there is room.
276 static struct string *
277 tty3270_alloc_string(struct tty3270 *tp, size_t size)
279 struct string *s, *n;
281 s = alloc_string(&tp->freemem, size);
284 list_for_each_entry_safe(s, n, &tp->lines, list) {
285 BUG_ON(tp->nr_lines <= tp->view.rows - 2);
287 if (!list_empty(&s->update))
288 list_del(&s->update);
290 if (free_string(&tp->freemem, s) >= size)
293 s = alloc_string(&tp->freemem, size);
295 if (tp->nr_up != 0 &&
296 tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
297 tp->nr_up = tp->nr_lines - tp->view.rows + 2;
298 tty3270_rebuild_update(tp);
299 tty3270_update_status(tp);
305 * Add an empty line to the list.
308 tty3270_blank_line(struct tty3270 *tp)
310 static const unsigned char blueprint[] =
311 { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
312 TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
315 s = tty3270_alloc_string(tp, sizeof(blueprint));
316 memcpy(s->string, blueprint, sizeof(blueprint));
317 s->len = sizeof(blueprint);
318 list_add_tail(&s->list, &tp->lines);
325 * Write request completion callback.
328 tty3270_write_callback(struct raw3270_request *rq, void *data)
330 struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
333 /* Write wasn't successful. Refresh all. */
334 tp->update_flags = TTY_UPDATE_ALL;
335 tty3270_set_timer(tp, 1);
337 raw3270_request_reset(rq);
338 xchg(&tp->write, rq);
342 * Update 3270 display.
345 tty3270_update(struct tty3270 *tp)
347 static char invalid_sba[2] = { 0xff, 0xff };
348 struct raw3270_request *wrq;
349 unsigned long updated;
350 struct string *s, *n;
354 wrq = xchg(&tp->write, 0);
356 tty3270_set_timer(tp, 1);
360 spin_lock(&tp->view.lock);
362 if (tp->update_flags & TTY_UPDATE_ALL) {
363 tty3270_rebuild_update(tp);
364 tty3270_update_status(tp);
365 tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
366 TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
368 if (tp->update_flags & TTY_UPDATE_ERASE) {
369 /* Use erase write alternate to erase display. */
370 raw3270_request_set_cmd(wrq, TC_EWRITEA);
371 updated |= TTY_UPDATE_ERASE;
373 raw3270_request_set_cmd(wrq, TC_WRITE);
375 raw3270_request_add_data(wrq, &tp->wcc, 1);
379 * Update status line.
381 if (tp->update_flags & TTY_UPDATE_STATUS)
382 if (raw3270_request_add_data(wrq, tp->status->string,
383 tp->status->len) == 0)
384 updated |= TTY_UPDATE_STATUS;
389 if (tp->update_flags & TTY_UPDATE_INPUT)
390 if (raw3270_request_add_data(wrq, tp->prompt->string,
391 tp->prompt->len) == 0)
392 updated |= TTY_UPDATE_INPUT;
396 if (tp->update_flags & TTY_UPDATE_LIST) {
397 /* Write strings in the update list to the screen. */
398 list_for_each_entry_safe(s, n, &tp->update, update) {
402 * Skip TO_SBA at the start of the string if the
403 * last output position matches the start address
406 if (s->string[1] == sba[0] && s->string[2] == sba[1])
408 if (raw3270_request_add_data(wrq, str, len) != 0)
410 list_del_init(&s->update);
411 sba = s->string + s->len - 3;
413 if (list_empty(&tp->update))
414 updated |= TTY_UPDATE_LIST;
416 wrq->callback = tty3270_write_callback;
417 rc = raw3270_start(&tp->view, wrq);
419 tp->update_flags &= ~updated;
420 if (tp->update_flags)
421 tty3270_set_timer(tp, 1);
423 raw3270_request_reset(wrq);
424 xchg(&tp->write, wrq);
426 spin_unlock(&tp->view.lock);
433 tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
440 if (tp->rcl_nr >= tp->rcl_max) {
441 s = list_entry(tp->rcl_lines.next, struct string, list);
443 free_string(&tp->freemem, s);
446 s = tty3270_alloc_string(tp, len);
447 memcpy(s->string, input, len);
448 list_add_tail(&s->list, &tp->rcl_lines);
453 tty3270_rcl_backward(struct kbd_data *kbd)
455 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
458 spin_lock_bh(&tp->view.lock);
459 if (tp->inattr == TF_INPUT) {
460 if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
461 tp->rcl_walk = tp->rcl_walk->prev;
462 else if (!list_empty(&tp->rcl_lines))
463 tp->rcl_walk = tp->rcl_lines.prev;
465 list_entry(tp->rcl_walk, struct string, list) : NULL;
467 s = list_entry(tp->rcl_walk, struct string, list);
468 tty3270_update_prompt(tp, s->string, s->len);
470 tty3270_update_prompt(tp, NULL, 0);
471 tty3270_set_timer(tp, 1);
473 spin_unlock_bh(&tp->view.lock);
477 * Deactivate tty view.
480 tty3270_exit_tty(struct kbd_data *kbd)
482 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
484 raw3270_deactivate_view(&tp->view);
488 * Scroll forward in history.
491 tty3270_scroll_forward(struct kbd_data *kbd)
493 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
496 spin_lock_bh(&tp->view.lock);
497 nr_up = tp->nr_up - tp->view.rows + 2;
500 if (nr_up != tp->nr_up) {
502 tty3270_rebuild_update(tp);
503 tty3270_update_status(tp);
504 tty3270_set_timer(tp, 1);
506 spin_unlock_bh(&tp->view.lock);
510 * Scroll backward in history.
513 tty3270_scroll_backward(struct kbd_data *kbd)
515 struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
518 spin_lock_bh(&tp->view.lock);
519 nr_up = tp->nr_up + tp->view.rows - 2;
520 if (nr_up + tp->view.rows - 2 > tp->nr_lines)
521 nr_up = tp->nr_lines - tp->view.rows + 2;
522 if (nr_up != tp->nr_up) {
524 tty3270_rebuild_update(tp);
525 tty3270_update_status(tp);
526 tty3270_set_timer(tp, 1);
528 spin_unlock_bh(&tp->view.lock);
532 * Pass input line to tty.
535 tty3270_read_tasklet(struct raw3270_request *rrq)
537 static char kreset_data = TW_KR;
538 struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
542 spin_lock_bh(&tp->view.lock);
544 * Two AID keys are special: For 0x7d (enter) the input line
545 * has to be emitted to the tty and for 0x6d the screen
546 * needs to be redrawn.
550 if (tp->input->string[0] == 0x7d) {
551 /* Enter: write input to tty. */
552 input = tp->input->string + 6;
553 len = tp->input->len - 6 - rrq->rescnt;
554 if (tp->inattr != TF_INPUTN)
555 tty3270_rcl_add(tp, input, len);
558 tty3270_rebuild_update(tp);
559 tty3270_update_status(tp);
561 /* Clear input area. */
562 tty3270_update_prompt(tp, NULL, 0);
563 tty3270_set_timer(tp, 1);
564 } else if (tp->input->string[0] == 0x6d) {
565 /* Display has been cleared. Redraw. */
566 tp->update_flags = TTY_UPDATE_ALL;
567 tty3270_set_timer(tp, 1);
569 spin_unlock_bh(&tp->view.lock);
571 /* Start keyboard reset command. */
572 raw3270_request_reset(tp->kreset);
573 raw3270_request_set_cmd(tp->kreset, TC_WRITE);
574 raw3270_request_add_data(tp->kreset, &kreset_data, 1);
575 raw3270_start(&tp->view, tp->kreset);
578 kbd_keycode(tp->kbd, *input++);
579 /* Emit keycode for AID byte. */
580 kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
582 raw3270_request_reset(rrq);
583 xchg(&tp->read, rrq);
584 raw3270_put_view(&tp->view);
588 * Read request completion callback.
591 tty3270_read_callback(struct raw3270_request *rq, void *data)
593 struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
594 raw3270_get_view(rq->view);
595 /* Schedule tasklet to pass input to tty. */
596 tasklet_schedule(&tp->readlet);
600 * Issue a read request. Call with device lock.
603 tty3270_issue_read(struct tty3270 *tp, int lock)
605 struct raw3270_request *rrq;
608 rrq = xchg(&tp->read, 0);
610 /* Read already scheduled. */
612 rrq->callback = tty3270_read_callback;
613 rrq->callback_data = tp;
614 raw3270_request_set_cmd(rrq, TC_READMOD);
615 raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
616 /* Issue the read modified request. */
618 rc = raw3270_start(&tp->view, rrq);
620 rc = raw3270_start_irq(&tp->view, rrq);
622 raw3270_request_reset(rrq);
623 xchg(&tp->read, rrq);
628 * Switch to the tty view.
631 tty3270_activate(struct raw3270_view *view)
633 struct tty3270 *tp = container_of(view, struct tty3270, view);
635 tp->update_flags = TTY_UPDATE_ALL;
636 tty3270_set_timer(tp, 1);
641 tty3270_deactivate(struct raw3270_view *view)
643 struct tty3270 *tp = container_of(view, struct tty3270, view);
645 del_timer(&tp->timer);
649 tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
651 /* Handle ATTN. Schedule tasklet to read aid. */
652 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
654 tty3270_issue_read(tp, 0);
660 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
663 /* Normal end. Copy residual count. */
664 rq->rescnt = irb->scsw.cmd.count;
666 return RAW3270_IO_DONE;
670 * Allocate tty3270 structure.
672 static struct tty3270 *
673 tty3270_alloc_view(void)
678 tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
682 kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
683 if (!tp->freemem_pages)
685 INIT_LIST_HEAD(&tp->freemem);
686 INIT_LIST_HEAD(&tp->lines);
687 INIT_LIST_HEAD(&tp->update);
688 INIT_LIST_HEAD(&tp->rcl_lines);
691 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
692 tp->freemem_pages[pages] = (void *)
693 __get_free_pages(GFP_KERNEL|GFP_DMA, 0);
694 if (!tp->freemem_pages[pages])
696 add_string_memory(&tp->freemem,
697 tp->freemem_pages[pages], PAGE_SIZE);
699 tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
700 if (IS_ERR(tp->write))
702 tp->read = raw3270_request_alloc(0);
703 if (IS_ERR(tp->read))
705 tp->kreset = raw3270_request_alloc(1);
706 if (IS_ERR(tp->kreset))
708 tp->kbd = kbd_alloc();
712 tty_port_init(&tp->port);
713 setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update,
715 tasklet_init(&tp->readlet,
716 (void (*)(unsigned long)) tty3270_read_tasklet,
717 (unsigned long) tp->read);
718 INIT_WORK(&tp->resize_work, tty3270_resize_work);
723 raw3270_request_free(tp->kreset);
725 raw3270_request_free(tp->read);
727 raw3270_request_free(tp->write);
730 free_pages((unsigned long) tp->freemem_pages[pages], 0);
731 kfree(tp->freemem_pages);
732 tty_port_destroy(&tp->port);
736 return ERR_PTR(-ENOMEM);
740 * Free tty3270 structure.
743 tty3270_free_view(struct tty3270 *tp)
747 del_timer_sync(&tp->timer);
749 raw3270_request_free(tp->kreset);
750 raw3270_request_free(tp->read);
751 raw3270_request_free(tp->write);
752 for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
753 free_pages((unsigned long) tp->freemem_pages[pages], 0);
754 kfree(tp->freemem_pages);
755 tty_port_destroy(&tp->port);
760 * Allocate tty3270 screen.
762 static struct tty3270_line *
763 tty3270_alloc_screen(unsigned int rows, unsigned int cols)
765 struct tty3270_line *screen;
769 size = sizeof(struct tty3270_line) * (rows - 2);
770 screen = kzalloc(size, GFP_KERNEL);
773 for (lines = 0; lines < rows - 2; lines++) {
774 size = sizeof(struct tty3270_cell) * cols;
775 screen[lines].cells = kzalloc(size, GFP_KERNEL);
776 if (!screen[lines].cells)
782 kfree(screen[lines].cells);
785 return ERR_PTR(-ENOMEM);
789 * Free tty3270 screen.
792 tty3270_free_screen(struct tty3270_line *screen, unsigned int rows)
796 for (lines = 0; lines < rows - 2; lines++)
797 kfree(screen[lines].cells);
802 * Resize tty3270 screen
804 static void tty3270_resize_work(struct work_struct *work)
806 struct tty3270 *tp = container_of(work, struct tty3270, resize_work);
807 struct tty3270_line *screen, *oscreen;
808 struct tty_struct *tty;
812 screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
815 /* Switch to new output size */
816 spin_lock_bh(&tp->view.lock);
817 oscreen = tp->screen;
818 orows = tp->view.rows;
819 tp->view.model = tp->n_model;
820 tp->view.rows = tp->n_rows;
821 tp->view.cols = tp->n_cols;
823 free_string(&tp->freemem, tp->prompt);
824 free_string(&tp->freemem, tp->status);
825 tty3270_create_prompt(tp);
826 tty3270_create_status(tp);
828 while (tp->nr_lines < tp->view.rows - 2)
829 tty3270_blank_line(tp);
830 tp->update_flags = TTY_UPDATE_ALL;
831 spin_unlock_bh(&tp->view.lock);
832 tty3270_free_screen(oscreen, orows);
833 tty3270_set_timer(tp, 1);
834 /* Informat tty layer about new size */
835 tty = tty_port_tty_get(&tp->port);
838 ws.ws_row = tp->view.rows - 2;
839 ws.ws_col = tp->view.cols;
840 tty_do_resize(tty, &ws);
844 tty3270_resize(struct raw3270_view *view, int model, int rows, int cols)
846 struct tty3270 *tp = container_of(view, struct tty3270, view);
851 schedule_work(&tp->resize_work);
855 * Unlink tty3270 data structure from tty.
858 tty3270_release(struct raw3270_view *view)
860 struct tty3270 *tp = container_of(view, struct tty3270, view);
861 struct tty_struct *tty = tty_port_tty_get(&tp->port);
864 tty->driver_data = NULL;
865 tty_port_tty_set(&tp->port, NULL);
867 raw3270_put_view(&tp->view);
873 * Free tty3270 data structure
876 tty3270_free(struct raw3270_view *view)
878 struct tty3270 *tp = container_of(view, struct tty3270, view);
880 tty3270_free_screen(tp->screen, tp->view.rows);
881 tty3270_free_view(tp);
885 * Delayed freeing of tty3270 views.
888 tty3270_del_views(void)
892 for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) {
893 struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i);
895 raw3270_del_view(view);
899 static struct raw3270_fn tty3270_fn = {
900 .activate = tty3270_activate,
901 .deactivate = tty3270_deactivate,
902 .intv = (void *) tty3270_irq,
903 .release = tty3270_release,
904 .free = tty3270_free,
905 .resize = tty3270_resize
909 * This routine is called whenever a 3270 tty is opened first time.
911 static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
913 struct raw3270_view *view;
917 /* Check if the tty3270 is already there. */
918 view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR);
920 tp = container_of(view, struct tty3270, view);
921 tty->driver_data = tp;
922 tty->winsize.ws_row = tp->view.rows - 2;
923 tty->winsize.ws_col = tp->view.cols;
924 tp->port.low_latency = 0;
925 /* why to reassign? */
926 tty_port_tty_set(&tp->port, tty);
927 tp->inattr = TF_INPUT;
928 return tty_port_install(&tp->port, driver, tty);
930 if (tty3270_max_index < tty->index + 1)
931 tty3270_max_index = tty->index + 1;
933 /* Allocate tty3270 structure on first open. */
934 tp = tty3270_alloc_view();
938 rc = raw3270_add_view(&tp->view, &tty3270_fn,
939 tty->index + RAW3270_FIRSTMINOR);
941 tty3270_free_view(tp);
945 tp->screen = tty3270_alloc_screen(tp->view.cols, tp->view.rows);
946 if (IS_ERR(tp->screen)) {
947 rc = PTR_ERR(tp->screen);
948 raw3270_put_view(&tp->view);
949 raw3270_del_view(&tp->view);
950 tty3270_free_view(tp);
954 tty_port_tty_set(&tp->port, tty);
955 tp->port.low_latency = 0;
956 tty->winsize.ws_row = tp->view.rows - 2;
957 tty->winsize.ws_col = tp->view.cols;
959 tty3270_create_prompt(tp);
960 tty3270_create_status(tp);
961 tty3270_update_status(tp);
963 /* Create blank line for every line in the tty output area. */
964 for (i = 0; i < tp->view.rows - 2; i++)
965 tty3270_blank_line(tp);
967 tp->kbd->port = &tp->port;
968 tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
969 tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
970 tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
971 tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
972 kbd_ascebc(tp->kbd, tp->view.ascebc);
974 raw3270_activate_view(&tp->view);
976 rc = tty_port_install(&tp->port, driver, tty);
978 raw3270_put_view(&tp->view);
982 tty->driver_data = tp;
988 * This routine is called whenever a 3270 tty is opened.
991 tty3270_open(struct tty_struct *tty, struct file *filp)
993 struct tty3270 *tp = tty->driver_data;
994 struct tty_port *port = &tp->port;
997 tty_port_tty_set(port, tty);
1002 * This routine is called when the 3270 tty is closed. We wait
1003 * for the remaining request to be completed. Then we clean up.
1006 tty3270_close(struct tty_struct *tty, struct file * filp)
1008 struct tty3270 *tp = tty->driver_data;
1013 tty->driver_data = NULL;
1014 tty_port_tty_set(&tp->port, NULL);
1018 static void tty3270_cleanup(struct tty_struct *tty)
1020 struct tty3270 *tp = tty->driver_data;
1023 raw3270_put_view(&tp->view);
1027 * We always have room.
1030 tty3270_write_room(struct tty_struct *tty)
1036 * Insert character into the screen at the current position with the
1037 * current color and highlight. This function does NOT do cursor movement.
1039 static void tty3270_put_character(struct tty3270 *tp, char ch)
1041 struct tty3270_line *line;
1042 struct tty3270_cell *cell;
1044 line = tp->screen + tp->cy;
1045 if (line->len <= tp->cx) {
1046 while (line->len < tp->cx) {
1047 cell = line->cells + line->len;
1048 cell->character = tp->view.ascebc[' '];
1049 cell->highlight = tp->highlight;
1050 cell->f_color = tp->f_color;
1055 cell = line->cells + tp->cx;
1056 cell->character = tp->view.ascebc[(unsigned int) ch];
1057 cell->highlight = tp->highlight;
1058 cell->f_color = tp->f_color;
1062 * Convert a tty3270_line to a 3270 data fragment usable for output.
1065 tty3270_convert_line(struct tty3270 *tp, int line_nr)
1067 struct tty3270_line *line;
1068 struct tty3270_cell *cell;
1069 struct string *s, *n;
1070 unsigned char highlight;
1071 unsigned char f_color;
1075 /* Determine how long the fragment will be. */
1076 flen = 3; /* Prefix (TO_SBA). */
1077 line = tp->screen + line_nr;
1079 highlight = TAX_RESET;
1080 f_color = TAC_RESET;
1081 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1082 if (cell->highlight != highlight) {
1083 flen += 3; /* TO_SA to switch highlight. */
1084 highlight = cell->highlight;
1086 if (cell->f_color != f_color) {
1087 flen += 3; /* TO_SA to switch color. */
1088 f_color = cell->f_color;
1091 if (highlight != TAX_RESET)
1092 flen += 3; /* TO_SA to reset hightlight. */
1093 if (f_color != TAC_RESET)
1094 flen += 3; /* TO_SA to reset color. */
1095 if (line->len < tp->view.cols)
1096 flen += 4; /* Postfix (TO_RA). */
1098 /* Find the line in the list. */
1099 i = tp->view.rows - 2 - line_nr;
1100 list_for_each_entry_reverse(s, &tp->lines, list)
1104 * Check if the line needs to get reallocated.
1106 if (s->len != flen) {
1107 /* Reallocate string. */
1108 n = tty3270_alloc_string(tp, flen);
1109 list_add(&n->list, &s->list);
1110 list_del_init(&s->list);
1111 if (!list_empty(&s->update))
1112 list_del_init(&s->update);
1113 free_string(&tp->freemem, s);
1117 /* Write 3270 data fragment. */
1123 highlight = TAX_RESET;
1124 f_color = TAC_RESET;
1125 for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
1126 if (cell->highlight != highlight) {
1129 *cp++ = cell->highlight;
1130 highlight = cell->highlight;
1132 if (cell->f_color != f_color) {
1135 *cp++ = cell->f_color;
1136 f_color = cell->f_color;
1138 *cp++ = cell->character;
1140 if (highlight != TAX_RESET) {
1145 if (f_color != TAC_RESET) {
1150 if (line->len < tp->view.cols) {
1157 if (tp->nr_up + line_nr < tp->view.rows - 2) {
1158 /* Line is currently visible on screen. */
1159 tty3270_update_string(tp, s, line_nr);
1160 /* Add line to update list. */
1161 if (list_empty(&s->update)) {
1162 list_add_tail(&s->update, &tp->update);
1163 tp->update_flags |= TTY_UPDATE_LIST;
1169 * Do carriage return.
1172 tty3270_cr(struct tty3270 *tp)
1181 tty3270_lf(struct tty3270 *tp)
1183 struct tty3270_line temp;
1186 tty3270_convert_line(tp, tp->cy);
1187 if (tp->cy < tp->view.rows - 3) {
1191 /* Last line just filled up. Add new, blank line. */
1192 tty3270_blank_line(tp);
1193 temp = tp->screen[0];
1195 for (i = 0; i < tp->view.rows - 3; i++)
1196 tp->screen[i] = tp->screen[i+1];
1197 tp->screen[tp->view.rows - 3] = temp;
1198 tty3270_rebuild_update(tp);
1202 tty3270_ri(struct tty3270 *tp)
1205 tty3270_convert_line(tp, tp->cy);
1211 * Insert characters at current position.
1214 tty3270_insert_characters(struct tty3270 *tp, int n)
1216 struct tty3270_line *line;
1219 line = tp->screen + tp->cy;
1220 while (line->len < tp->cx) {
1221 line->cells[line->len].character = tp->view.ascebc[' '];
1222 line->cells[line->len].highlight = TAX_RESET;
1223 line->cells[line->len].f_color = TAC_RESET;
1226 if (n > tp->view.cols - tp->cx)
1227 n = tp->view.cols - tp->cx;
1228 k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
1230 line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
1232 if (line->len > tp->view.cols)
1233 line->len = tp->view.cols;
1235 line->cells[tp->cx + n].character = tp->view.ascebc[' '];
1236 line->cells[tp->cx + n].highlight = tp->highlight;
1237 line->cells[tp->cx + n].f_color = tp->f_color;
1242 * Delete characters at current position.
1245 tty3270_delete_characters(struct tty3270 *tp, int n)
1247 struct tty3270_line *line;
1250 line = tp->screen + tp->cy;
1251 if (line->len <= tp->cx)
1253 if (line->len - tp->cx <= n) {
1257 for (i = tp->cx; i + n < line->len; i++)
1258 line->cells[i] = line->cells[i + n];
1263 * Erase characters at current position.
1266 tty3270_erase_characters(struct tty3270 *tp, int n)
1268 struct tty3270_line *line;
1269 struct tty3270_cell *cell;
1271 line = tp->screen + tp->cy;
1272 while (line->len > tp->cx && n-- > 0) {
1273 cell = line->cells + tp->cx++;
1274 cell->character = ' ';
1275 cell->highlight = TAX_RESET;
1276 cell->f_color = TAC_RESET;
1279 tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
1283 * Erase line, 3 different cases:
1284 * Esc [ 0 K Erase from current position to end of line inclusive
1285 * Esc [ 1 K Erase from beginning of line to current position inclusive
1286 * Esc [ 2 K Erase entire line (without moving cursor)
1289 tty3270_erase_line(struct tty3270 *tp, int mode)
1291 struct tty3270_line *line;
1292 struct tty3270_cell *cell;
1295 line = tp->screen + tp->cy;
1298 else if (mode == 1) {
1299 for (i = 0; i < tp->cx; i++) {
1300 cell = line->cells + i;
1301 cell->character = ' ';
1302 cell->highlight = TAX_RESET;
1303 cell->f_color = TAC_RESET;
1305 if (line->len <= tp->cx)
1306 line->len = tp->cx + 1;
1307 } else if (mode == 2)
1309 tty3270_convert_line(tp, tp->cy);
1313 * Erase display, 3 different cases:
1314 * Esc [ 0 J Erase from current position to bottom of screen inclusive
1315 * Esc [ 1 J Erase from top of screen to current position inclusive
1316 * Esc [ 2 J Erase entire screen (without moving the cursor)
1319 tty3270_erase_display(struct tty3270 *tp, int mode)
1324 tty3270_erase_line(tp, 0);
1325 for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
1326 tp->screen[i].len = 0;
1327 tty3270_convert_line(tp, i);
1329 } else if (mode == 1) {
1330 for (i = 0; i < tp->cy; i++) {
1331 tp->screen[i].len = 0;
1332 tty3270_convert_line(tp, i);
1334 tty3270_erase_line(tp, 1);
1335 } else if (mode == 2) {
1336 for (i = 0; i < tp->view.rows - 2; i++) {
1337 tp->screen[i].len = 0;
1338 tty3270_convert_line(tp, i);
1341 tty3270_rebuild_update(tp);
1345 * Set attributes found in an escape sequence.
1346 * Esc [ <attr> ; <attr> ; ... m
1349 tty3270_set_attributes(struct tty3270 *tp)
1351 static unsigned char f_colors[] = {
1352 TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
1353 TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
1357 for (i = 0; i <= tp->esc_npar; i++) {
1358 attr = tp->esc_par[i];
1361 tp->highlight = TAX_RESET;
1362 tp->f_color = TAC_RESET;
1365 case 4: /* Start underlining. */
1366 tp->highlight = TAX_UNDER;
1368 case 5: /* Start blink. */
1369 tp->highlight = TAX_BLINK;
1371 case 7: /* Start reverse. */
1372 tp->highlight = TAX_REVER;
1374 case 24: /* End underlining */
1375 if (tp->highlight == TAX_UNDER)
1376 tp->highlight = TAX_RESET;
1378 case 25: /* End blink. */
1379 if (tp->highlight == TAX_BLINK)
1380 tp->highlight = TAX_RESET;
1382 case 27: /* End reverse. */
1383 if (tp->highlight == TAX_REVER)
1384 tp->highlight = TAX_RESET;
1386 /* Foreground color. */
1387 case 30: /* Black */
1389 case 32: /* Green */
1390 case 33: /* Yellow */
1392 case 35: /* Magenta */
1394 case 37: /* White */
1395 case 39: /* Black */
1396 tp->f_color = f_colors[attr - 30];
1403 tty3270_getpar(struct tty3270 *tp, int ix)
1405 return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
1409 tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
1411 int max_cx = max(0, cx);
1412 int max_cy = max(0, cy);
1414 tp->cx = min_t(int, tp->view.cols - 1, max_cx);
1415 cy = min_t(int, tp->view.rows - 3, max_cy);
1417 tty3270_convert_line(tp, tp->cy);
1423 * Process escape sequences. Known sequences:
1424 * Esc 7 Save Cursor Position
1425 * Esc 8 Restore Cursor Position
1426 * Esc [ Pn ; Pn ; .. m Set attributes
1427 * Esc [ Pn ; Pn H Cursor Position
1428 * Esc [ Pn ; Pn f Cursor Position
1429 * Esc [ Pn A Cursor Up
1430 * Esc [ Pn B Cursor Down
1431 * Esc [ Pn C Cursor Forward
1432 * Esc [ Pn D Cursor Backward
1433 * Esc [ Pn G Cursor Horizontal Absolute
1434 * Esc [ Pn X Erase Characters
1435 * Esc [ Ps J Erase in Display
1436 * Esc [ Ps K Erase in Line
1437 * // FIXME: add all the new ones.
1439 * Pn is a numeric parameter, a string of zero or more decimal digits.
1440 * Ps is a selective parameter.
1443 tty3270_escape_sequence(struct tty3270 *tp, char ch)
1445 enum { ESnormal, ESesc, ESsquare, ESgetpars };
1447 if (tp->esc_state == ESnormal) {
1449 /* Starting new escape sequence. */
1450 tp->esc_state = ESesc;
1453 if (tp->esc_state == ESesc) {
1454 tp->esc_state = ESnormal;
1457 tp->esc_state = ESsquare;
1469 case 'Z': /* Respond ID. */
1470 kbd_puts_queue(&tp->port, "\033[?6c");
1472 case '7': /* Save cursor position. */
1473 tp->saved_cx = tp->cx;
1474 tp->saved_cy = tp->cy;
1475 tp->saved_highlight = tp->highlight;
1476 tp->saved_f_color = tp->f_color;
1478 case '8': /* Restore cursor position. */
1479 tty3270_convert_line(tp, tp->cy);
1480 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1481 tp->highlight = tp->saved_highlight;
1482 tp->f_color = tp->saved_f_color;
1484 case 'c': /* Reset terminal. */
1485 tp->cx = tp->saved_cx = 0;
1486 tp->cy = tp->saved_cy = 0;
1487 tp->highlight = tp->saved_highlight = TAX_RESET;
1488 tp->f_color = tp->saved_f_color = TAC_RESET;
1489 tty3270_erase_display(tp, 2);
1494 if (tp->esc_state == ESsquare) {
1495 tp->esc_state = ESgetpars;
1496 memset(tp->esc_par, 0, sizeof(tp->esc_par));
1498 tp->esc_ques = (ch == '?');
1502 if (tp->esc_state == ESgetpars) {
1503 if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
1507 if (ch >= '0' && ch <= '9') {
1508 tp->esc_par[tp->esc_npar] *= 10;
1509 tp->esc_par[tp->esc_npar] += ch - '0';
1513 tp->esc_state = ESnormal;
1514 if (ch == 'n' && !tp->esc_ques) {
1515 if (tp->esc_par[0] == 5) /* Status report. */
1516 kbd_puts_queue(&tp->port, "\033[0n");
1517 else if (tp->esc_par[0] == 6) { /* Cursor report. */
1519 sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
1520 kbd_puts_queue(&tp->port, buf);
1528 tty3270_set_attributes(tp);
1530 case 'H': /* Set cursor position. */
1532 tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
1533 tty3270_getpar(tp, 0) - 1);
1535 case 'd': /* Set y position. */
1536 tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
1538 case 'A': /* Cursor up. */
1540 tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
1542 case 'B': /* Cursor down. */
1545 tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
1547 case 'C': /* Cursor forward. */
1549 tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
1551 case 'D': /* Cursor backward. */
1552 tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
1554 case 'G': /* Set x position. */
1556 tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
1558 case 'X': /* Erase Characters. */
1559 tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
1561 case 'J': /* Erase display. */
1562 tty3270_erase_display(tp, tp->esc_par[0]);
1564 case 'K': /* Erase line. */
1565 tty3270_erase_line(tp, tp->esc_par[0]);
1567 case 'P': /* Delete characters. */
1568 tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
1570 case '@': /* Insert characters. */
1571 tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
1573 case 's': /* Save cursor position. */
1574 tp->saved_cx = tp->cx;
1575 tp->saved_cy = tp->cy;
1576 tp->saved_highlight = tp->highlight;
1577 tp->saved_f_color = tp->f_color;
1579 case 'u': /* Restore cursor position. */
1580 tty3270_convert_line(tp, tp->cy);
1581 tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
1582 tp->highlight = tp->saved_highlight;
1583 tp->f_color = tp->saved_f_color;
1589 * String write routine for 3270 ttys
1592 tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
1593 const unsigned char *buf, int count)
1597 spin_lock_bh(&tp->view.lock);
1598 for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) {
1599 if (tp->esc_state != 0) {
1600 /* Continue escape sequence. */
1601 tty3270_escape_sequence(tp, buf[i_msg]);
1605 switch (buf[i_msg]) {
1606 case 0x07: /* '\a' -- Alarm */
1607 tp->wcc |= TW_PLUSALARM;
1609 case 0x08: /* Backspace. */
1612 tty3270_put_character(tp, ' ');
1615 case 0x09: /* '\t' -- Tabulate */
1616 for (i = tp->cx % 8; i < 8; i++) {
1617 if (tp->cx >= tp->view.cols) {
1622 tty3270_put_character(tp, ' ');
1626 case 0x0a: /* '\n' -- New Line */
1630 case 0x0c: /* '\f' -- Form Feed */
1631 tty3270_erase_display(tp, 2);
1632 tp->cx = tp->cy = 0;
1634 case 0x0d: /* '\r' -- Carriage Return */
1637 case 0x0f: /* SuSE "exit alternate mode" */
1639 case 0x1b: /* Start escape sequence. */
1640 tty3270_escape_sequence(tp, buf[i_msg]);
1642 default: /* Insert normal character. */
1643 if (tp->cx >= tp->view.cols) {
1647 tty3270_put_character(tp, buf[i_msg]);
1652 /* Convert current line to 3270 data fragment. */
1653 tty3270_convert_line(tp, tp->cy);
1655 /* Setup timer to update display after 1/10 second */
1656 if (!timer_pending(&tp->timer))
1657 tty3270_set_timer(tp, HZ/10);
1659 spin_unlock_bh(&tp->view.lock);
1663 * String write routine for 3270 ttys
1666 tty3270_write(struct tty_struct * tty,
1667 const unsigned char *buf, int count)
1671 tp = tty->driver_data;
1674 if (tp->char_count > 0) {
1675 tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
1678 tty3270_do_write(tp, tty, buf, count);
1683 * Put single characters to the ttys character buffer
1685 static int tty3270_put_char(struct tty_struct *tty, unsigned char ch)
1689 tp = tty->driver_data;
1690 if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE)
1692 tp->char_buf[tp->char_count++] = ch;
1697 * Flush all characters from the ttys characeter buffer put there
1698 * by tty3270_put_char.
1701 tty3270_flush_chars(struct tty_struct *tty)
1705 tp = tty->driver_data;
1708 if (tp->char_count > 0) {
1709 tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
1715 * Returns the number of characters in the output buffer. This is
1716 * used in tty_wait_until_sent to wait until all characters have
1717 * appeared on the screen.
1720 tty3270_chars_in_buffer(struct tty_struct *tty)
1726 tty3270_flush_buffer(struct tty_struct *tty)
1731 * Check for visible/invisible input switches
1734 tty3270_set_termios(struct tty_struct *tty, struct ktermios *old)
1739 tp = tty->driver_data;
1742 spin_lock_bh(&tp->view.lock);
1743 if (L_ICANON(tty)) {
1744 new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
1745 if (new != tp->inattr) {
1747 tty3270_update_prompt(tp, NULL, 0);
1748 tty3270_set_timer(tp, 1);
1751 spin_unlock_bh(&tp->view.lock);
1755 * Disable reading from a 3270 tty
1758 tty3270_throttle(struct tty_struct * tty)
1762 tp = tty->driver_data;
1769 * Enable reading from a 3270 tty
1772 tty3270_unthrottle(struct tty_struct * tty)
1776 tp = tty->driver_data;
1781 tty3270_issue_read(tp, 1);
1785 * Hang up the tty device.
1788 tty3270_hangup(struct tty_struct *tty)
1794 tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
1798 static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
1803 tp = tty->driver_data;
1806 if (tty->flags & (1 << TTY_IO_ERROR))
1808 return kbd_ioctl(tp->kbd, cmd, arg);
1811 #ifdef CONFIG_COMPAT
1812 static long tty3270_compat_ioctl(struct tty_struct *tty,
1813 unsigned int cmd, unsigned long arg)
1817 tp = tty->driver_data;
1820 if (tty->flags & (1 << TTY_IO_ERROR))
1822 return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
1826 static const struct tty_operations tty3270_ops = {
1827 .install = tty3270_install,
1828 .cleanup = tty3270_cleanup,
1829 .open = tty3270_open,
1830 .close = tty3270_close,
1831 .write = tty3270_write,
1832 .put_char = tty3270_put_char,
1833 .flush_chars = tty3270_flush_chars,
1834 .write_room = tty3270_write_room,
1835 .chars_in_buffer = tty3270_chars_in_buffer,
1836 .flush_buffer = tty3270_flush_buffer,
1837 .throttle = tty3270_throttle,
1838 .unthrottle = tty3270_unthrottle,
1839 .hangup = tty3270_hangup,
1840 .wait_until_sent = tty3270_wait_until_sent,
1841 .ioctl = tty3270_ioctl,
1842 #ifdef CONFIG_COMPAT
1843 .compat_ioctl = tty3270_compat_ioctl,
1845 .set_termios = tty3270_set_termios
1848 void tty3270_create_cb(int minor)
1850 tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL);
1853 void tty3270_destroy_cb(int minor)
1855 tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR);
1858 struct raw3270_notifier tty3270_notifier =
1860 .create = tty3270_create_cb,
1861 .destroy = tty3270_destroy_cb,
1865 * 3270 tty registration code called from tty_init().
1866 * Most kernel services (incl. kmalloc) are available at this poimt.
1868 static int __init tty3270_init(void)
1870 struct tty_driver *driver;
1873 driver = tty_alloc_driver(RAW3270_MAXDEVS,
1874 TTY_DRIVER_REAL_RAW |
1875 TTY_DRIVER_DYNAMIC_DEV |
1876 TTY_DRIVER_RESET_TERMIOS);
1878 return PTR_ERR(driver);
1881 * Initialize the tty_driver structure
1882 * Entries in tty3270_driver that are NOT initialized:
1883 * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
1885 driver->driver_name = "tty3270";
1886 driver->name = "3270/tty";
1887 driver->major = IBM_TTY3270_MAJOR;
1888 driver->minor_start = RAW3270_FIRSTMINOR;
1889 driver->name_base = RAW3270_FIRSTMINOR;
1890 driver->type = TTY_DRIVER_TYPE_SYSTEM;
1891 driver->subtype = SYSTEM_TYPE_TTY;
1892 driver->init_termios = tty_std_termios;
1893 tty_set_operations(driver, &tty3270_ops);
1894 ret = tty_register_driver(driver);
1896 put_tty_driver(driver);
1899 tty3270_driver = driver;
1900 raw3270_register_notifier(&tty3270_notifier);
1907 struct tty_driver *driver;
1909 raw3270_unregister_notifier(&tty3270_notifier);
1910 driver = tty3270_driver;
1911 tty3270_driver = NULL;
1912 tty_unregister_driver(driver);
1913 put_tty_driver(driver);
1914 tty3270_del_views();
1917 MODULE_LICENSE("GPL");
1918 MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
1920 module_init(tty3270_init);
1921 module_exit(tty3270_exit);