Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/s390/char/tty3270.c | |
3 | * IBM/3270 Driver - tty functions. | |
4 | * | |
5 | * Author(s): | |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
9 | */ | |
10 | ||
11 | #include <linux/config.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/kdev_t.h> | |
15 | #include <linux/tty.h> | |
16 | #include <linux/vt_kern.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/console.h> | |
19 | #include <linux/interrupt.h> | |
20 | ||
21 | #include <linux/slab.h> | |
22 | #include <linux/bootmem.h> | |
23 | ||
24 | #include <asm/ccwdev.h> | |
25 | #include <asm/cio.h> | |
26 | #include <asm/ebcdic.h> | |
27 | #include <asm/uaccess.h> | |
28 | ||
29 | ||
30 | #include "raw3270.h" | |
31 | #include "keyboard.h" | |
32 | ||
33 | #define TTY3270_CHAR_BUF_SIZE 256 | |
34 | #define TTY3270_OUTPUT_BUFFER_SIZE 1024 | |
35 | #define TTY3270_STRING_PAGES 5 | |
36 | ||
37 | struct tty_driver *tty3270_driver; | |
38 | static int tty3270_max_index; | |
39 | ||
40 | struct raw3270_fn tty3270_fn; | |
41 | ||
42 | struct tty3270_cell { | |
43 | unsigned char character; | |
44 | unsigned char highlight; | |
45 | unsigned char f_color; | |
46 | }; | |
47 | ||
48 | struct tty3270_line { | |
49 | struct tty3270_cell *cells; | |
50 | int len; | |
51 | }; | |
52 | ||
53 | #define ESCAPE_NPAR 8 | |
54 | ||
55 | /* | |
56 | * The main tty view data structure. | |
57 | * FIXME: | |
58 | * 1) describe line orientation & lines list concept against screen | |
59 | * 2) describe conversion of screen to lines | |
60 | * 3) describe line format. | |
61 | */ | |
62 | struct tty3270 { | |
63 | struct raw3270_view view; | |
64 | struct tty_struct *tty; /* Pointer to tty structure */ | |
65 | void **freemem_pages; /* Array of pages used for freemem. */ | |
66 | struct list_head freemem; /* List of free memory for strings. */ | |
67 | ||
68 | /* Output stuff. */ | |
69 | struct list_head lines; /* List of lines. */ | |
70 | struct list_head update; /* List of lines to update. */ | |
71 | unsigned char wcc; /* Write control character. */ | |
72 | int nr_lines; /* # lines in list. */ | |
73 | int nr_up; /* # lines up in history. */ | |
74 | unsigned long update_flags; /* Update indication bits. */ | |
75 | struct string *status; /* Lower right of display. */ | |
76 | struct raw3270_request *write; /* Single write request. */ | |
77 | struct timer_list timer; /* Output delay timer. */ | |
78 | ||
79 | /* Current tty screen. */ | |
80 | unsigned int cx, cy; /* Current output position. */ | |
81 | unsigned int highlight; /* Blink/reverse/underscore */ | |
82 | unsigned int f_color; /* Foreground color */ | |
83 | struct tty3270_line *screen; | |
84 | ||
85 | /* Input stuff. */ | |
86 | struct string *prompt; /* Output string for input area. */ | |
87 | struct string *input; /* Input string for read request. */ | |
88 | struct raw3270_request *read; /* Single read request. */ | |
89 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
90 | unsigned char inattr; /* Visible/invisible input. */ | |
91 | int throttle, attn; /* tty throttle/unthrottle. */ | |
92 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
93 | struct kbd_data *kbd; /* key_maps stuff. */ | |
94 | ||
95 | /* Escape sequence parsing. */ | |
96 | int esc_state, esc_ques, esc_npar; | |
97 | int esc_par[ESCAPE_NPAR]; | |
98 | unsigned int saved_cx, saved_cy; | |
99 | unsigned int saved_highlight, saved_f_color; | |
100 | ||
101 | /* Command recalling. */ | |
102 | struct list_head rcl_lines; /* List of recallable lines. */ | |
103 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
104 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
105 | ||
106 | /* Character array for put_char/flush_chars. */ | |
107 | unsigned int char_count; | |
108 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
109 | }; | |
110 | ||
111 | /* tty3270->update_flags. See tty3270_update for details. */ | |
112 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
113 | #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
114 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ | |
115 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
116 | #define TTY_UPDATE_ALL 15 | |
117 | ||
118 | static void tty3270_update(struct tty3270 *); | |
119 | ||
120 | /* | |
121 | * Setup timeout for a device. On timeout trigger an update. | |
122 | */ | |
123 | void | |
124 | tty3270_set_timer(struct tty3270 *tp, int expires) | |
125 | { | |
126 | if (expires == 0) { | |
127 | if (timer_pending(&tp->timer) && del_timer(&tp->timer)) | |
128 | raw3270_put_view(&tp->view); | |
129 | return; | |
130 | } | |
131 | if (timer_pending(&tp->timer) && | |
132 | mod_timer(&tp->timer, jiffies + expires)) | |
133 | return; | |
134 | raw3270_get_view(&tp->view); | |
135 | tp->timer.function = (void (*)(unsigned long)) tty3270_update; | |
136 | tp->timer.data = (unsigned long) tp; | |
137 | tp->timer.expires = jiffies + expires; | |
138 | add_timer(&tp->timer); | |
139 | } | |
140 | ||
141 | /* | |
142 | * The input line are the two last lines of the screen. | |
143 | */ | |
144 | static void | |
145 | tty3270_update_prompt(struct tty3270 *tp, char *input, int count) | |
146 | { | |
147 | struct string *line; | |
148 | unsigned int off; | |
149 | ||
150 | line = tp->prompt; | |
151 | if (count != 0) | |
152 | line->string[5] = TF_INMDT; | |
153 | else | |
154 | line->string[5] = tp->inattr; | |
155 | if (count > tp->view.cols * 2 - 11) | |
156 | count = tp->view.cols * 2 - 11; | |
157 | memcpy(line->string + 6, input, count); | |
158 | line->string[6 + count] = TO_IC; | |
159 | /* Clear to end of input line. */ | |
160 | if (count < tp->view.cols * 2 - 11) { | |
161 | line->string[7 + count] = TO_RA; | |
162 | line->string[10 + count] = 0; | |
163 | off = tp->view.cols * tp->view.rows - 9; | |
164 | raw3270_buffer_address(tp->view.dev, line->string+count+8, off); | |
165 | line->len = 11 + count; | |
166 | } else | |
167 | line->len = 7 + count; | |
168 | tp->update_flags |= TTY_UPDATE_INPUT; | |
169 | } | |
170 | ||
171 | static void | |
172 | tty3270_create_prompt(struct tty3270 *tp) | |
173 | { | |
174 | static const unsigned char blueprint[] = | |
175 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
176 | /* empty input string */ | |
177 | TO_IC, TO_RA, 0, 0, 0 }; | |
178 | struct string *line; | |
179 | unsigned int offset; | |
180 | ||
181 | line = alloc_string(&tp->freemem, | |
182 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
183 | tp->prompt = line; | |
184 | tp->inattr = TF_INPUT; | |
185 | /* Copy blueprint to status line */ | |
186 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
187 | line->len = sizeof(blueprint); | |
188 | /* Set output offsets. */ | |
189 | offset = tp->view.cols * (tp->view.rows - 2); | |
190 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
191 | offset = tp->view.cols * tp->view.rows - 9; | |
192 | raw3270_buffer_address(tp->view.dev, line->string + 8, offset); | |
193 | ||
194 | /* Allocate input string for reading. */ | |
195 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
196 | } | |
197 | ||
198 | /* | |
199 | * The status line is the last line of the screen. It shows the string | |
200 | * "Running"/"Holding" in the lower right corner of the screen. | |
201 | */ | |
202 | static void | |
203 | tty3270_update_status(struct tty3270 * tp) | |
204 | { | |
205 | char *str; | |
206 | ||
207 | str = (tp->nr_up != 0) ? "History" : "Running"; | |
208 | memcpy(tp->status->string + 8, str, 7); | |
209 | codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); | |
210 | tp->update_flags |= TTY_UPDATE_STATUS; | |
211 | } | |
212 | ||
213 | static void | |
214 | tty3270_create_status(struct tty3270 * tp) | |
215 | { | |
216 | static const unsigned char blueprint[] = | |
217 | { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, | |
218 | 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, | |
219 | TAC_RESET }; | |
220 | struct string *line; | |
221 | unsigned int offset; | |
222 | ||
223 | line = alloc_string(&tp->freemem,sizeof(blueprint)); | |
224 | tp->status = line; | |
225 | /* Copy blueprint to status line */ | |
226 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
227 | /* Set address to start of status string (= last 9 characters). */ | |
228 | offset = tp->view.cols * tp->view.rows - 9; | |
229 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Set output offsets to 3270 datastream fragment of a tty string. | |
234 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
235 | */ | |
236 | static void | |
237 | tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) | |
238 | { | |
239 | unsigned char *cp; | |
240 | ||
241 | raw3270_buffer_address(tp->view.dev, line->string + 1, | |
242 | tp->view.cols * nr); | |
243 | cp = line->string + line->len - 4; | |
244 | if (*cp == TO_RA) | |
245 | raw3270_buffer_address(tp->view.dev, cp + 1, | |
246 | tp->view.cols * (nr + 1)); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Rebuild update list to print all lines. | |
251 | */ | |
252 | static void | |
253 | tty3270_rebuild_update(struct tty3270 *tp) | |
254 | { | |
255 | struct string *s, *n; | |
256 | int line, nr_up; | |
257 | ||
258 | /* | |
259 | * Throw away update list and create a new one, | |
260 | * containing all lines that will fit on the screen. | |
261 | */ | |
262 | list_for_each_entry_safe(s, n, &tp->update, update) | |
263 | list_del_init(&s->update); | |
264 | line = tp->view.rows - 3; | |
265 | nr_up = tp->nr_up; | |
266 | list_for_each_entry_reverse(s, &tp->lines, list) { | |
267 | if (nr_up > 0) { | |
268 | nr_up--; | |
269 | continue; | |
270 | } | |
271 | tty3270_update_string(tp, s, line); | |
272 | list_add(&s->update, &tp->update); | |
273 | if (--line < 0) | |
274 | break; | |
275 | } | |
276 | tp->update_flags |= TTY_UPDATE_LIST; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Alloc string for size bytes. If there is not enough room in | |
281 | * freemem, free strings until there is room. | |
282 | */ | |
283 | static struct string * | |
284 | tty3270_alloc_string(struct tty3270 *tp, size_t size) | |
285 | { | |
286 | struct string *s, *n; | |
287 | ||
288 | s = alloc_string(&tp->freemem, size); | |
289 | if (s) | |
290 | return s; | |
291 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
292 | BUG_ON(tp->nr_lines <= tp->view.rows - 2); | |
293 | list_del(&s->list); | |
294 | if (!list_empty(&s->update)) | |
295 | list_del(&s->update); | |
296 | tp->nr_lines--; | |
297 | if (free_string(&tp->freemem, s) >= size) | |
298 | break; | |
299 | } | |
300 | s = alloc_string(&tp->freemem, size); | |
301 | BUG_ON(!s); | |
302 | if (tp->nr_up != 0 && | |
303 | tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { | |
304 | tp->nr_up = tp->nr_lines - tp->view.rows + 2; | |
305 | tty3270_rebuild_update(tp); | |
306 | tty3270_update_status(tp); | |
307 | } | |
308 | return s; | |
309 | } | |
310 | ||
311 | /* | |
312 | * Add an empty line to the list. | |
313 | */ | |
314 | static void | |
315 | tty3270_blank_line(struct tty3270 *tp) | |
316 | { | |
317 | static const unsigned char blueprint[] = | |
318 | { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, | |
319 | TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; | |
320 | struct string *s; | |
321 | ||
322 | s = tty3270_alloc_string(tp, sizeof(blueprint)); | |
323 | memcpy(s->string, blueprint, sizeof(blueprint)); | |
324 | s->len = sizeof(blueprint); | |
325 | list_add_tail(&s->list, &tp->lines); | |
326 | tp->nr_lines++; | |
327 | if (tp->nr_up != 0) | |
328 | tp->nr_up++; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Write request completion callback. | |
333 | */ | |
334 | static void | |
335 | tty3270_write_callback(struct raw3270_request *rq, void *data) | |
336 | { | |
337 | struct tty3270 *tp; | |
338 | ||
339 | tp = (struct tty3270 *) rq->view; | |
340 | if (rq->rc != 0) { | |
341 | /* Write wasn't successfull. Refresh all. */ | |
342 | tty3270_rebuild_update(tp); | |
343 | tp->update_flags = TTY_UPDATE_ALL; | |
344 | tty3270_set_timer(tp, 1); | |
345 | } | |
346 | raw3270_request_reset(rq); | |
347 | xchg(&tp->write, rq); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Update 3270 display. | |
352 | */ | |
353 | static void | |
354 | tty3270_update(struct tty3270 *tp) | |
355 | { | |
356 | static char invalid_sba[2] = { 0xff, 0xff }; | |
357 | struct raw3270_request *wrq; | |
358 | unsigned long updated; | |
359 | struct string *s, *n; | |
360 | char *sba, *str; | |
361 | int rc, len; | |
362 | ||
363 | wrq = xchg(&tp->write, 0); | |
364 | if (!wrq) { | |
365 | tty3270_set_timer(tp, 1); | |
366 | return; | |
367 | } | |
368 | ||
369 | spin_lock(&tp->view.lock); | |
370 | updated = 0; | |
371 | if (tp->update_flags & TTY_UPDATE_ERASE) { | |
372 | /* Use erase write alternate to erase display. */ | |
373 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
374 | updated |= TTY_UPDATE_ERASE; | |
375 | } else | |
376 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
377 | ||
378 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
379 | tp->wcc = TW_NONE; | |
380 | ||
381 | /* | |
382 | * Update status line. | |
383 | */ | |
384 | if (tp->update_flags & TTY_UPDATE_STATUS) | |
385 | if (raw3270_request_add_data(wrq, tp->status->string, | |
386 | tp->status->len) == 0) | |
387 | updated |= TTY_UPDATE_STATUS; | |
388 | ||
389 | /* | |
390 | * Write input line. | |
391 | */ | |
392 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
393 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
394 | tp->prompt->len) == 0) | |
395 | updated |= TTY_UPDATE_INPUT; | |
396 | ||
397 | sba = invalid_sba; | |
398 | ||
399 | if (tp->update_flags & TTY_UPDATE_LIST) { | |
400 | /* Write strings in the update list to the screen. */ | |
401 | list_for_each_entry_safe(s, n, &tp->update, update) { | |
402 | str = s->string; | |
403 | len = s->len; | |
404 | /* | |
405 | * Skip TO_SBA at the start of the string if the | |
406 | * last output position matches the start address | |
407 | * of this line. | |
408 | */ | |
409 | if (s->string[1] == sba[0] && s->string[2] == sba[1]) | |
410 | str += 3, len -= 3; | |
411 | if (raw3270_request_add_data(wrq, str, len) != 0) | |
412 | break; | |
413 | list_del_init(&s->update); | |
414 | sba = s->string + s->len - 3; | |
415 | } | |
416 | if (list_empty(&tp->update)) | |
417 | updated |= TTY_UPDATE_LIST; | |
418 | } | |
419 | wrq->callback = tty3270_write_callback; | |
420 | rc = raw3270_start(&tp->view, wrq); | |
421 | if (rc == 0) { | |
422 | tp->update_flags &= ~updated; | |
423 | if (tp->update_flags) | |
424 | tty3270_set_timer(tp, 1); | |
425 | } else { | |
426 | raw3270_request_reset(wrq); | |
427 | xchg(&tp->write, wrq); | |
428 | } | |
429 | spin_unlock(&tp->view.lock); | |
430 | raw3270_put_view(&tp->view); | |
431 | } | |
432 | ||
433 | /* | |
434 | * Command recalling. | |
435 | */ | |
436 | static void | |
437 | tty3270_rcl_add(struct tty3270 *tp, char *input, int len) | |
438 | { | |
439 | struct string *s; | |
440 | ||
441 | tp->rcl_walk = 0; | |
442 | if (len <= 0) | |
443 | return; | |
444 | if (tp->rcl_nr >= tp->rcl_max) { | |
445 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
446 | list_del(&s->list); | |
447 | free_string(&tp->freemem, s); | |
448 | tp->rcl_nr--; | |
449 | } | |
450 | s = tty3270_alloc_string(tp, len); | |
451 | memcpy(s->string, input, len); | |
452 | list_add_tail(&s->list, &tp->rcl_lines); | |
453 | tp->rcl_nr++; | |
454 | } | |
455 | ||
456 | static void | |
457 | tty3270_rcl_backward(struct kbd_data *kbd) | |
458 | { | |
459 | struct tty3270 *tp; | |
460 | struct string *s; | |
461 | ||
462 | tp = kbd->tty->driver_data; | |
463 | spin_lock_bh(&tp->view.lock); | |
464 | if (tp->inattr == TF_INPUT) { | |
465 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
466 | tp->rcl_walk = tp->rcl_walk->prev; | |
467 | else if (!list_empty(&tp->rcl_lines)) | |
468 | tp->rcl_walk = tp->rcl_lines.prev; | |
469 | s = tp->rcl_walk ? | |
470 | list_entry(tp->rcl_walk, struct string, list) : 0; | |
471 | if (tp->rcl_walk) { | |
472 | s = list_entry(tp->rcl_walk, struct string, list); | |
473 | tty3270_update_prompt(tp, s->string, s->len); | |
474 | } else | |
475 | tty3270_update_prompt(tp, 0, 0); | |
476 | tty3270_set_timer(tp, 1); | |
477 | } | |
478 | spin_unlock_bh(&tp->view.lock); | |
479 | } | |
480 | ||
481 | /* | |
482 | * Deactivate tty view. | |
483 | */ | |
484 | static void | |
485 | tty3270_exit_tty(struct kbd_data *kbd) | |
486 | { | |
487 | struct tty3270 *tp; | |
488 | ||
489 | tp = kbd->tty->driver_data; | |
490 | raw3270_deactivate_view(&tp->view); | |
491 | } | |
492 | ||
493 | /* | |
494 | * Scroll forward in history. | |
495 | */ | |
496 | static void | |
497 | tty3270_scroll_forward(struct kbd_data *kbd) | |
498 | { | |
499 | struct tty3270 *tp; | |
500 | int nr_up; | |
501 | ||
502 | tp = kbd->tty->driver_data; | |
503 | spin_lock_bh(&tp->view.lock); | |
504 | nr_up = tp->nr_up - tp->view.rows + 2; | |
505 | if (nr_up < 0) | |
506 | nr_up = 0; | |
507 | if (nr_up != tp->nr_up) { | |
508 | tp->nr_up = nr_up; | |
509 | tty3270_rebuild_update(tp); | |
510 | tty3270_update_status(tp); | |
511 | tty3270_set_timer(tp, 1); | |
512 | } | |
513 | spin_unlock_bh(&tp->view.lock); | |
514 | } | |
515 | ||
516 | /* | |
517 | * Scroll backward in history. | |
518 | */ | |
519 | static void | |
520 | tty3270_scroll_backward(struct kbd_data *kbd) | |
521 | { | |
522 | struct tty3270 *tp; | |
523 | int nr_up; | |
524 | ||
525 | tp = kbd->tty->driver_data; | |
526 | spin_lock_bh(&tp->view.lock); | |
527 | nr_up = tp->nr_up + tp->view.rows - 2; | |
528 | if (nr_up + tp->view.rows - 2 > tp->nr_lines) | |
529 | nr_up = tp->nr_lines - tp->view.rows + 2; | |
530 | if (nr_up != tp->nr_up) { | |
531 | tp->nr_up = nr_up; | |
532 | tty3270_rebuild_update(tp); | |
533 | tty3270_update_status(tp); | |
534 | tty3270_set_timer(tp, 1); | |
535 | } | |
536 | spin_unlock_bh(&tp->view.lock); | |
537 | } | |
538 | ||
539 | /* | |
540 | * Pass input line to tty. | |
541 | */ | |
542 | static void | |
543 | tty3270_read_tasklet(struct raw3270_request *rrq) | |
544 | { | |
545 | static char kreset_data = TW_KR; | |
546 | struct tty3270 *tp; | |
547 | char *input; | |
548 | int len; | |
549 | ||
550 | tp = (struct tty3270 *) rrq->view; | |
551 | spin_lock_bh(&tp->view.lock); | |
552 | /* | |
553 | * Two AID keys are special: For 0x7d (enter) the input line | |
554 | * has to be emitted to the tty and for 0x6d the screen | |
555 | * needs to be redrawn. | |
556 | */ | |
557 | input = 0; | |
558 | len = 0; | |
559 | if (tp->input->string[0] == 0x7d) { | |
560 | /* Enter: write input to tty. */ | |
561 | input = tp->input->string + 6; | |
562 | len = tp->input->len - 6 - rrq->rescnt; | |
563 | if (tp->inattr != TF_INPUTN) | |
564 | tty3270_rcl_add(tp, input, len); | |
565 | if (tp->nr_up > 0) { | |
566 | tp->nr_up = 0; | |
567 | tty3270_rebuild_update(tp); | |
568 | tty3270_update_status(tp); | |
569 | } | |
570 | /* Clear input area. */ | |
571 | tty3270_update_prompt(tp, 0, 0); | |
572 | tty3270_set_timer(tp, 1); | |
573 | } else if (tp->input->string[0] == 0x6d) { | |
574 | /* Display has been cleared. Redraw. */ | |
575 | tty3270_rebuild_update(tp); | |
576 | tp->update_flags = TTY_UPDATE_ALL; | |
577 | tty3270_set_timer(tp, 1); | |
578 | } | |
579 | spin_unlock_bh(&tp->view.lock); | |
580 | ||
581 | /* Start keyboard reset command. */ | |
582 | raw3270_request_reset(tp->kreset); | |
583 | raw3270_request_set_cmd(tp->kreset, TC_WRITE); | |
584 | raw3270_request_add_data(tp->kreset, &kreset_data, 1); | |
585 | raw3270_start(&tp->view, tp->kreset); | |
586 | ||
587 | /* Emit input string. */ | |
588 | if (tp->tty) { | |
589 | while (len-- > 0) | |
590 | kbd_keycode(tp->kbd, *input++); | |
591 | /* Emit keycode for AID byte. */ | |
592 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
593 | } | |
594 | ||
595 | raw3270_request_reset(rrq); | |
596 | xchg(&tp->read, rrq); | |
597 | raw3270_put_view(&tp->view); | |
598 | } | |
599 | ||
600 | /* | |
601 | * Read request completion callback. | |
602 | */ | |
603 | static void | |
604 | tty3270_read_callback(struct raw3270_request *rq, void *data) | |
605 | { | |
606 | raw3270_get_view(rq->view); | |
607 | /* Schedule tasklet to pass input to tty. */ | |
608 | tasklet_schedule(&((struct tty3270 *) rq->view)->readlet); | |
609 | } | |
610 | ||
611 | /* | |
612 | * Issue a read request. Call with device lock. | |
613 | */ | |
614 | static void | |
615 | tty3270_issue_read(struct tty3270 *tp, int lock) | |
616 | { | |
617 | struct raw3270_request *rrq; | |
618 | int rc; | |
619 | ||
620 | rrq = xchg(&tp->read, 0); | |
621 | if (!rrq) | |
622 | /* Read already scheduled. */ | |
623 | return; | |
624 | rrq->callback = tty3270_read_callback; | |
625 | rrq->callback_data = tp; | |
626 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
627 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
628 | /* Issue the read modified request. */ | |
629 | if (lock) { | |
630 | rc = raw3270_start(&tp->view, rrq); | |
631 | } else | |
632 | rc = raw3270_start_irq(&tp->view, rrq); | |
633 | if (rc) { | |
634 | raw3270_request_reset(rrq); | |
635 | xchg(&tp->read, rrq); | |
636 | } | |
637 | } | |
638 | ||
639 | /* | |
640 | * Switch to the tty view. | |
641 | */ | |
642 | static int | |
643 | tty3270_activate(struct raw3270_view *view) | |
644 | { | |
645 | struct tty3270 *tp; | |
646 | unsigned long flags; | |
647 | ||
648 | tp = (struct tty3270 *) view; | |
649 | spin_lock_irqsave(&tp->view.lock, flags); | |
650 | tp->nr_up = 0; | |
651 | tty3270_rebuild_update(tp); | |
652 | tty3270_update_status(tp); | |
653 | tp->update_flags = TTY_UPDATE_ALL; | |
654 | tty3270_set_timer(tp, 1); | |
655 | spin_unlock_irqrestore(&tp->view.lock, flags); | |
656 | start_tty(tp->tty); | |
657 | return 0; | |
658 | } | |
659 | ||
660 | static void | |
661 | tty3270_deactivate(struct raw3270_view *view) | |
662 | { | |
663 | struct tty3270 *tp; | |
664 | ||
665 | tp = (struct tty3270 *) view; | |
666 | if (tp && tp->tty) | |
667 | stop_tty(tp->tty); | |
668 | } | |
669 | ||
670 | static int | |
671 | tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) | |
672 | { | |
673 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
674 | if (irb->scsw.dstat & DEV_STAT_ATTENTION) { | |
675 | if (!tp->throttle) | |
676 | tty3270_issue_read(tp, 0); | |
677 | else | |
678 | tp->attn = 1; | |
679 | } | |
680 | ||
681 | if (rq) { | |
682 | if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) | |
683 | rq->rc = -EIO; | |
684 | else | |
685 | /* Normal end. Copy residual count. */ | |
686 | rq->rescnt = irb->scsw.count; | |
687 | } | |
688 | return RAW3270_IO_DONE; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Allocate tty3270 structure. | |
693 | */ | |
694 | static struct tty3270 * | |
695 | tty3270_alloc_view(void) | |
696 | { | |
697 | struct tty3270 *tp; | |
698 | int pages; | |
699 | ||
700 | tp = kmalloc(sizeof(struct tty3270),GFP_KERNEL); | |
701 | if (!tp) | |
702 | goto out_err; | |
703 | memset(tp, 0, sizeof(struct tty3270)); | |
704 | tp->freemem_pages = | |
705 | kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL); | |
706 | if (!tp->freemem_pages) | |
707 | goto out_tp; | |
708 | INIT_LIST_HEAD(&tp->freemem); | |
709 | init_timer(&tp->timer); | |
710 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { | |
711 | tp->freemem_pages[pages] = (void *) | |
712 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
713 | if (!tp->freemem_pages[pages]) | |
714 | goto out_pages; | |
715 | add_string_memory(&tp->freemem, | |
716 | tp->freemem_pages[pages], PAGE_SIZE); | |
717 | } | |
718 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
719 | if (!tp->write) | |
720 | goto out_pages; | |
721 | tp->read = raw3270_request_alloc(0); | |
722 | if (!tp->read) | |
723 | goto out_write; | |
724 | tp->kreset = raw3270_request_alloc(1); | |
725 | if (!tp->kreset) | |
726 | goto out_read; | |
727 | tp->kbd = kbd_alloc(); | |
728 | if (!tp->kbd) | |
729 | goto out_reset; | |
730 | return tp; | |
731 | ||
732 | out_reset: | |
733 | raw3270_request_free(tp->kreset); | |
734 | out_read: | |
735 | raw3270_request_free(tp->read); | |
736 | out_write: | |
737 | raw3270_request_free(tp->write); | |
738 | out_pages: | |
739 | while (pages--) | |
740 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
741 | kfree(tp->freemem_pages); | |
742 | out_tp: | |
743 | kfree(tp); | |
744 | out_err: | |
745 | return ERR_PTR(-ENOMEM); | |
746 | } | |
747 | ||
748 | /* | |
749 | * Free tty3270 structure. | |
750 | */ | |
751 | static void | |
752 | tty3270_free_view(struct tty3270 *tp) | |
753 | { | |
754 | int pages; | |
755 | ||
756 | kbd_free(tp->kbd); | |
757 | raw3270_request_free(tp->kreset); | |
758 | raw3270_request_free(tp->read); | |
759 | raw3270_request_free(tp->write); | |
760 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) | |
761 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
762 | kfree(tp->freemem_pages); | |
763 | kfree(tp); | |
764 | } | |
765 | ||
766 | /* | |
767 | * Allocate tty3270 screen. | |
768 | */ | |
769 | static int | |
770 | tty3270_alloc_screen(struct tty3270 *tp) | |
771 | { | |
772 | unsigned long size; | |
773 | int lines; | |
774 | ||
775 | size = sizeof(struct tty3270_line) * (tp->view.rows - 2); | |
776 | tp->screen = kmalloc(size, GFP_KERNEL); | |
777 | if (!tp->screen) | |
778 | goto out_err; | |
779 | memset(tp->screen, 0, size); | |
780 | for (lines = 0; lines < tp->view.rows - 2; lines++) { | |
781 | size = sizeof(struct tty3270_cell) * tp->view.cols; | |
782 | tp->screen[lines].cells = kmalloc(size, GFP_KERNEL); | |
783 | if (!tp->screen[lines].cells) | |
784 | goto out_screen; | |
785 | memset(tp->screen[lines].cells, 0, size); | |
786 | } | |
787 | return 0; | |
788 | out_screen: | |
789 | while (lines--) | |
790 | kfree(tp->screen[lines].cells); | |
791 | kfree(tp->screen); | |
792 | out_err: | |
793 | return -ENOMEM; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Free tty3270 screen. | |
798 | */ | |
799 | static void | |
800 | tty3270_free_screen(struct tty3270 *tp) | |
801 | { | |
802 | int lines; | |
803 | ||
804 | for (lines = 0; lines < tp->view.rows - 2; lines++) | |
805 | kfree(tp->screen[lines].cells); | |
806 | kfree(tp->screen); | |
807 | } | |
808 | ||
809 | /* | |
810 | * Unlink tty3270 data structure from tty. | |
811 | */ | |
812 | static void | |
813 | tty3270_release(struct raw3270_view *view) | |
814 | { | |
815 | struct tty3270 *tp; | |
816 | struct tty_struct *tty; | |
817 | ||
818 | tp = (struct tty3270 *) view; | |
819 | tty = tp->tty; | |
820 | if (tty) { | |
821 | tty->driver_data = 0; | |
822 | tp->tty = tp->kbd->tty = 0; | |
823 | tty_hangup(tty); | |
824 | raw3270_put_view(&tp->view); | |
825 | } | |
826 | } | |
827 | ||
828 | /* | |
829 | * Free tty3270 data structure | |
830 | */ | |
831 | static void | |
832 | tty3270_free(struct raw3270_view *view) | |
833 | { | |
834 | tty3270_free_screen((struct tty3270 *) view); | |
835 | tty3270_free_view((struct tty3270 *) view); | |
836 | } | |
837 | ||
838 | /* | |
839 | * Delayed freeing of tty3270 views. | |
840 | */ | |
841 | static void | |
842 | tty3270_del_views(void) | |
843 | { | |
844 | struct tty3270 *tp; | |
845 | int i; | |
846 | ||
847 | for (i = 0; i < tty3270_max_index; i++) { | |
848 | tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, i); | |
849 | if (!IS_ERR(tp)) | |
850 | raw3270_del_view(&tp->view); | |
851 | } | |
852 | } | |
853 | ||
854 | struct raw3270_fn tty3270_fn = { | |
855 | .activate = tty3270_activate, | |
856 | .deactivate = tty3270_deactivate, | |
857 | .intv = (void *) tty3270_irq, | |
858 | .release = tty3270_release, | |
859 | .free = tty3270_free | |
860 | }; | |
861 | ||
862 | /* | |
863 | * This routine is called whenever a 3270 tty is opened. | |
864 | */ | |
865 | static int | |
866 | tty3270_open(struct tty_struct *tty, struct file * filp) | |
867 | { | |
868 | struct tty3270 *tp; | |
869 | int i, rc; | |
870 | ||
871 | if (tty->count > 1) | |
872 | return 0; | |
873 | /* Check if the tty3270 is already there. */ | |
874 | tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, tty->index); | |
875 | if (!IS_ERR(tp)) { | |
876 | tty->driver_data = tp; | |
877 | tty->winsize.ws_row = tp->view.rows - 2; | |
878 | tty->winsize.ws_col = tp->view.cols; | |
879 | tty->low_latency = 0; | |
880 | tp->tty = tty; | |
881 | tp->kbd->tty = tty; | |
882 | tp->inattr = TF_INPUT; | |
883 | return 0; | |
884 | } | |
885 | if (tty3270_max_index < tty->index + 1) | |
886 | tty3270_max_index = tty->index + 1; | |
887 | ||
888 | /* Quick exit if there is no device for tty->index. */ | |
889 | if (PTR_ERR(tp) == -ENODEV) | |
890 | return -ENODEV; | |
891 | ||
892 | /* Allocate tty3270 structure on first open. */ | |
893 | tp = tty3270_alloc_view(); | |
894 | if (IS_ERR(tp)) | |
895 | return PTR_ERR(tp); | |
896 | ||
897 | INIT_LIST_HEAD(&tp->lines); | |
898 | INIT_LIST_HEAD(&tp->update); | |
899 | INIT_LIST_HEAD(&tp->rcl_lines); | |
900 | tp->rcl_max = 20; | |
901 | init_timer(&tp->timer); | |
902 | tasklet_init(&tp->readlet, | |
903 | (void (*)(unsigned long)) tty3270_read_tasklet, | |
904 | (unsigned long) tp->read); | |
905 | ||
906 | rc = raw3270_add_view(&tp->view, &tty3270_fn, tty->index); | |
907 | if (rc) { | |
908 | tty3270_free_view(tp); | |
909 | return rc; | |
910 | } | |
911 | ||
912 | rc = tty3270_alloc_screen(tp); | |
913 | if (rc) { | |
914 | raw3270_del_view(&tp->view); | |
915 | raw3270_put_view(&tp->view); | |
916 | return rc; | |
917 | } | |
918 | ||
919 | tp->tty = tty; | |
920 | tty->low_latency = 0; | |
921 | tty->driver_data = tp; | |
922 | tty->winsize.ws_row = tp->view.rows - 2; | |
923 | tty->winsize.ws_col = tp->view.cols; | |
924 | ||
925 | tty3270_create_prompt(tp); | |
926 | tty3270_create_status(tp); | |
927 | tty3270_update_status(tp); | |
928 | ||
929 | /* Create blank line for every line in the tty output area. */ | |
930 | for (i = 0; i < tp->view.rows - 2; i++) | |
931 | tty3270_blank_line(tp); | |
932 | ||
933 | tp->kbd->tty = tty; | |
934 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; | |
935 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
936 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
937 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
938 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
939 | ||
940 | raw3270_activate_view(&tp->view); | |
941 | return 0; | |
942 | } | |
943 | ||
944 | /* | |
945 | * This routine is called when the 3270 tty is closed. We wait | |
946 | * for the remaining request to be completed. Then we clean up. | |
947 | */ | |
948 | static void | |
949 | tty3270_close(struct tty_struct *tty, struct file * filp) | |
950 | { | |
951 | struct tty3270 *tp; | |
952 | ||
953 | if (tty->count > 1) | |
954 | return; | |
955 | tp = (struct tty3270 *) tty->driver_data; | |
956 | if (tp) { | |
957 | tty->driver_data = 0; | |
958 | tp->tty = tp->kbd->tty = 0; | |
959 | raw3270_put_view(&tp->view); | |
960 | } | |
961 | } | |
962 | ||
963 | /* | |
964 | * We always have room. | |
965 | */ | |
966 | static int | |
967 | tty3270_write_room(struct tty_struct *tty) | |
968 | { | |
969 | return INT_MAX; | |
970 | } | |
971 | ||
972 | /* | |
973 | * Insert character into the screen at the current position with the | |
974 | * current color and highlight. This function does NOT do cursor movement. | |
975 | */ | |
976 | static void | |
977 | tty3270_put_character(struct tty3270 *tp, char ch) | |
978 | { | |
979 | struct tty3270_line *line; | |
980 | struct tty3270_cell *cell; | |
981 | ||
982 | line = tp->screen + tp->cy; | |
983 | if (line->len <= tp->cx) { | |
984 | while (line->len < tp->cx) { | |
985 | cell = line->cells + line->len; | |
986 | cell->character = tp->view.ascebc[' ']; | |
987 | cell->highlight = tp->highlight; | |
988 | cell->f_color = tp->f_color; | |
989 | line->len++; | |
990 | } | |
991 | line->len++; | |
992 | } | |
993 | cell = line->cells + tp->cx; | |
994 | cell->character = tp->view.ascebc[(unsigned int) ch]; | |
995 | cell->highlight = tp->highlight; | |
996 | cell->f_color = tp->f_color; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
1001 | */ | |
1002 | static void | |
1003 | tty3270_convert_line(struct tty3270 *tp, int line_nr) | |
1004 | { | |
1005 | struct tty3270_line *line; | |
1006 | struct tty3270_cell *cell; | |
1007 | struct string *s, *n; | |
1008 | unsigned char highlight; | |
1009 | unsigned char f_color; | |
1010 | char *cp; | |
1011 | int flen, i; | |
1012 | ||
1013 | /* Determine how long the fragment will be. */ | |
1014 | flen = 3; /* Prefix (TO_SBA). */ | |
1015 | line = tp->screen + line_nr; | |
1016 | flen += line->len; | |
1017 | highlight = TAX_RESET; | |
1018 | f_color = TAC_RESET; | |
1019 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1020 | if (cell->highlight != highlight) { | |
1021 | flen += 3; /* TO_SA to switch highlight. */ | |
1022 | highlight = cell->highlight; | |
1023 | } | |
1024 | if (cell->f_color != f_color) { | |
1025 | flen += 3; /* TO_SA to switch color. */ | |
1026 | f_color = cell->f_color; | |
1027 | } | |
1028 | } | |
1029 | if (highlight != TAX_RESET) | |
1030 | flen += 3; /* TO_SA to reset hightlight. */ | |
1031 | if (f_color != TAC_RESET) | |
1032 | flen += 3; /* TO_SA to reset color. */ | |
1033 | if (line->len < tp->view.cols) | |
1034 | flen += 4; /* Postfix (TO_RA). */ | |
1035 | ||
1036 | /* Find the line in the list. */ | |
1037 | i = tp->view.rows - 2 - line_nr; | |
1038 | list_for_each_entry_reverse(s, &tp->lines, list) | |
1039 | if (--i <= 0) | |
1040 | break; | |
1041 | /* | |
1042 | * Check if the line needs to get reallocated. | |
1043 | */ | |
1044 | if (s->len != flen) { | |
1045 | /* Reallocate string. */ | |
1046 | n = tty3270_alloc_string(tp, flen); | |
1047 | list_add(&n->list, &s->list); | |
1048 | list_del_init(&s->list); | |
1049 | if (!list_empty(&s->update)) | |
1050 | list_del_init(&s->update); | |
1051 | free_string(&tp->freemem, s); | |
1052 | s = n; | |
1053 | } | |
1054 | ||
1055 | /* Write 3270 data fragment. */ | |
1056 | cp = s->string; | |
1057 | *cp++ = TO_SBA; | |
1058 | *cp++ = 0; | |
1059 | *cp++ = 0; | |
1060 | ||
1061 | highlight = TAX_RESET; | |
1062 | f_color = TAC_RESET; | |
1063 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1064 | if (cell->highlight != highlight) { | |
1065 | *cp++ = TO_SA; | |
1066 | *cp++ = TAT_EXTHI; | |
1067 | *cp++ = cell->highlight; | |
1068 | highlight = cell->highlight; | |
1069 | } | |
1070 | if (cell->f_color != f_color) { | |
1071 | *cp++ = TO_SA; | |
1072 | *cp++ = TAT_COLOR; | |
1073 | *cp++ = cell->f_color; | |
1074 | f_color = cell->f_color; | |
1075 | } | |
1076 | *cp++ = cell->character; | |
1077 | } | |
1078 | if (highlight != TAX_RESET) { | |
1079 | *cp++ = TO_SA; | |
1080 | *cp++ = TAT_EXTHI; | |
1081 | *cp++ = TAX_RESET; | |
1082 | } | |
1083 | if (f_color != TAC_RESET) { | |
1084 | *cp++ = TO_SA; | |
1085 | *cp++ = TAT_COLOR; | |
1086 | *cp++ = TAC_RESET; | |
1087 | } | |
1088 | if (line->len < tp->view.cols) { | |
1089 | *cp++ = TO_RA; | |
1090 | *cp++ = 0; | |
1091 | *cp++ = 0; | |
1092 | *cp++ = 0; | |
1093 | } | |
1094 | ||
1095 | if (tp->nr_up + line_nr < tp->view.rows - 2) { | |
1096 | /* Line is currently visible on screen. */ | |
1097 | tty3270_update_string(tp, s, line_nr); | |
1098 | /* Add line to update list. */ | |
1099 | if (list_empty(&s->update)) { | |
1100 | list_add_tail(&s->update, &tp->update); | |
1101 | tp->update_flags |= TTY_UPDATE_LIST; | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Do carriage return. | |
1108 | */ | |
1109 | static void | |
1110 | tty3270_cr(struct tty3270 *tp) | |
1111 | { | |
1112 | tp->cx = 0; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Do line feed. | |
1117 | */ | |
1118 | static void | |
1119 | tty3270_lf(struct tty3270 *tp) | |
1120 | { | |
1121 | struct tty3270_line temp; | |
1122 | int i; | |
1123 | ||
1124 | tty3270_convert_line(tp, tp->cy); | |
1125 | if (tp->cy < tp->view.rows - 3) { | |
1126 | tp->cy++; | |
1127 | return; | |
1128 | } | |
1129 | /* Last line just filled up. Add new, blank line. */ | |
1130 | tty3270_blank_line(tp); | |
1131 | temp = tp->screen[0]; | |
1132 | temp.len = 0; | |
1133 | for (i = 0; i < tp->view.rows - 3; i++) | |
1134 | tp->screen[i] = tp->screen[i+1]; | |
1135 | tp->screen[tp->view.rows - 3] = temp; | |
1136 | tty3270_rebuild_update(tp); | |
1137 | } | |
1138 | ||
1139 | static void | |
1140 | tty3270_ri(struct tty3270 *tp) | |
1141 | { | |
1142 | if (tp->cy > 0) { | |
1143 | tty3270_convert_line(tp, tp->cy); | |
1144 | tp->cy--; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Insert characters at current position. | |
1150 | */ | |
1151 | static void | |
1152 | tty3270_insert_characters(struct tty3270 *tp, int n) | |
1153 | { | |
1154 | struct tty3270_line *line; | |
1155 | int k; | |
1156 | ||
1157 | line = tp->screen + tp->cy; | |
1158 | while (line->len < tp->cx) { | |
1159 | line->cells[line->len].character = tp->view.ascebc[' ']; | |
1160 | line->cells[line->len].highlight = TAX_RESET; | |
1161 | line->cells[line->len].f_color = TAC_RESET; | |
1162 | line->len++; | |
1163 | } | |
1164 | if (n > tp->view.cols - tp->cx) | |
1165 | n = tp->view.cols - tp->cx; | |
1166 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1167 | while (k--) | |
1168 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1169 | line->len += n; | |
1170 | if (line->len > tp->view.cols) | |
1171 | line->len = tp->view.cols; | |
1172 | while (n-- > 0) { | |
1173 | line->cells[tp->cx + n].character = tp->view.ascebc[' ']; | |
1174 | line->cells[tp->cx + n].highlight = tp->highlight; | |
1175 | line->cells[tp->cx + n].f_color = tp->f_color; | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * Delete characters at current position. | |
1181 | */ | |
1182 | static void | |
1183 | tty3270_delete_characters(struct tty3270 *tp, int n) | |
1184 | { | |
1185 | struct tty3270_line *line; | |
1186 | int i; | |
1187 | ||
1188 | line = tp->screen + tp->cy; | |
1189 | if (line->len <= tp->cx) | |
1190 | return; | |
1191 | if (line->len - tp->cx <= n) { | |
1192 | line->len = tp->cx; | |
1193 | return; | |
1194 | } | |
1195 | for (i = tp->cx; i + n < line->len; i++) | |
1196 | line->cells[i] = line->cells[i + n]; | |
1197 | line->len -= n; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Erase characters at current position. | |
1202 | */ | |
1203 | static void | |
1204 | tty3270_erase_characters(struct tty3270 *tp, int n) | |
1205 | { | |
1206 | struct tty3270_line *line; | |
1207 | struct tty3270_cell *cell; | |
1208 | ||
1209 | line = tp->screen + tp->cy; | |
1210 | while (line->len > tp->cx && n-- > 0) { | |
1211 | cell = line->cells + tp->cx++; | |
1212 | cell->character = ' '; | |
1213 | cell->highlight = TAX_RESET; | |
1214 | cell->f_color = TAC_RESET; | |
1215 | } | |
1216 | tp->cx += n; | |
1217 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * Erase line, 3 different cases: | |
1222 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1223 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1224 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1225 | */ | |
1226 | static void | |
1227 | tty3270_erase_line(struct tty3270 *tp, int mode) | |
1228 | { | |
1229 | struct tty3270_line *line; | |
1230 | struct tty3270_cell *cell; | |
1231 | int i; | |
1232 | ||
1233 | line = tp->screen + tp->cy; | |
1234 | if (mode == 0) | |
1235 | line->len = tp->cx; | |
1236 | else if (mode == 1) { | |
1237 | for (i = 0; i < tp->cx; i++) { | |
1238 | cell = line->cells + i; | |
1239 | cell->character = ' '; | |
1240 | cell->highlight = TAX_RESET; | |
1241 | cell->f_color = TAC_RESET; | |
1242 | } | |
1243 | if (line->len <= tp->cx) | |
1244 | line->len = tp->cx + 1; | |
1245 | } else if (mode == 2) | |
1246 | line->len = 0; | |
1247 | tty3270_convert_line(tp, tp->cy); | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * Erase display, 3 different cases: | |
1252 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1253 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1254 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1255 | */ | |
1256 | static void | |
1257 | tty3270_erase_display(struct tty3270 *tp, int mode) | |
1258 | { | |
1259 | int i; | |
1260 | ||
1261 | if (mode == 0) { | |
1262 | tty3270_erase_line(tp, 0); | |
1263 | for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { | |
1264 | tp->screen[i].len = 0; | |
1265 | tty3270_convert_line(tp, i); | |
1266 | } | |
1267 | } else if (mode == 1) { | |
1268 | for (i = 0; i < tp->cy; i++) { | |
1269 | tp->screen[i].len = 0; | |
1270 | tty3270_convert_line(tp, i); | |
1271 | } | |
1272 | tty3270_erase_line(tp, 1); | |
1273 | } else if (mode == 2) { | |
1274 | for (i = 0; i < tp->view.rows - 2; i++) { | |
1275 | tp->screen[i].len = 0; | |
1276 | tty3270_convert_line(tp, i); | |
1277 | } | |
1278 | } | |
1279 | tty3270_rebuild_update(tp); | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Set attributes found in an escape sequence. | |
1284 | * Esc [ <attr> ; <attr> ; ... m | |
1285 | */ | |
1286 | static void | |
1287 | tty3270_set_attributes(struct tty3270 *tp) | |
1288 | { | |
1289 | static unsigned char f_colors[] = { | |
1290 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, | |
1291 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1292 | }; | |
1293 | int i, attr; | |
1294 | ||
1295 | for (i = 0; i <= tp->esc_npar; i++) { | |
1296 | attr = tp->esc_par[i]; | |
1297 | switch (attr) { | |
1298 | case 0: /* Reset */ | |
1299 | tp->highlight = TAX_RESET; | |
1300 | tp->f_color = TAC_RESET; | |
1301 | break; | |
1302 | /* Highlight. */ | |
1303 | case 4: /* Start underlining. */ | |
1304 | tp->highlight = TAX_UNDER; | |
1305 | break; | |
1306 | case 5: /* Start blink. */ | |
1307 | tp->highlight = TAX_BLINK; | |
1308 | break; | |
1309 | case 7: /* Start reverse. */ | |
1310 | tp->highlight = TAX_REVER; | |
1311 | break; | |
1312 | case 24: /* End underlining */ | |
1313 | if (tp->highlight == TAX_UNDER) | |
1314 | tp->highlight = TAX_RESET; | |
1315 | break; | |
1316 | case 25: /* End blink. */ | |
1317 | if (tp->highlight == TAX_BLINK) | |
1318 | tp->highlight = TAX_RESET; | |
1319 | break; | |
1320 | case 27: /* End reverse. */ | |
1321 | if (tp->highlight == TAX_REVER) | |
1322 | tp->highlight = TAX_RESET; | |
1323 | break; | |
1324 | /* Foreground color. */ | |
1325 | case 30: /* Black */ | |
1326 | case 31: /* Red */ | |
1327 | case 32: /* Green */ | |
1328 | case 33: /* Yellow */ | |
1329 | case 34: /* Blue */ | |
1330 | case 35: /* Magenta */ | |
1331 | case 36: /* Cyan */ | |
1332 | case 37: /* White */ | |
1333 | case 39: /* Black */ | |
1334 | tp->f_color = f_colors[attr - 30]; | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | static inline int | |
1341 | tty3270_getpar(struct tty3270 *tp, int ix) | |
1342 | { | |
1343 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1344 | } | |
1345 | ||
1346 | static void | |
1347 | tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) | |
1348 | { | |
1349 | tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx)); | |
1350 | cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy)); | |
1351 | if (cy != tp->cy) { | |
1352 | tty3270_convert_line(tp, tp->cy); | |
1353 | tp->cy = cy; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Process escape sequences. Known sequences: | |
1359 | * Esc 7 Save Cursor Position | |
1360 | * Esc 8 Restore Cursor Position | |
1361 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1362 | * Esc [ Pn ; Pn H Cursor Position | |
1363 | * Esc [ Pn ; Pn f Cursor Position | |
1364 | * Esc [ Pn A Cursor Up | |
1365 | * Esc [ Pn B Cursor Down | |
1366 | * Esc [ Pn C Cursor Forward | |
1367 | * Esc [ Pn D Cursor Backward | |
1368 | * Esc [ Pn G Cursor Horizontal Absolute | |
1369 | * Esc [ Pn X Erase Characters | |
1370 | * Esc [ Ps J Erase in Display | |
1371 | * Esc [ Ps K Erase in Line | |
1372 | * // FIXME: add all the new ones. | |
1373 | * | |
1374 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1375 | * Ps is a selective parameter. | |
1376 | */ | |
1377 | static void | |
1378 | tty3270_escape_sequence(struct tty3270 *tp, char ch) | |
1379 | { | |
1380 | enum { ESnormal, ESesc, ESsquare, ESgetpars }; | |
1381 | ||
1382 | if (tp->esc_state == ESnormal) { | |
1383 | if (ch == 0x1b) | |
1384 | /* Starting new escape sequence. */ | |
1385 | tp->esc_state = ESesc; | |
1386 | return; | |
1387 | } | |
1388 | if (tp->esc_state == ESesc) { | |
1389 | tp->esc_state = ESnormal; | |
1390 | switch (ch) { | |
1391 | case '[': | |
1392 | tp->esc_state = ESsquare; | |
1393 | break; | |
1394 | case 'E': | |
1395 | tty3270_cr(tp); | |
1396 | tty3270_lf(tp); | |
1397 | break; | |
1398 | case 'M': | |
1399 | tty3270_ri(tp); | |
1400 | break; | |
1401 | case 'D': | |
1402 | tty3270_lf(tp); | |
1403 | break; | |
1404 | case 'Z': /* Respond ID. */ | |
1405 | kbd_puts_queue(tp->tty, "\033[?6c"); | |
1406 | break; | |
1407 | case '7': /* Save cursor position. */ | |
1408 | tp->saved_cx = tp->cx; | |
1409 | tp->saved_cy = tp->cy; | |
1410 | tp->saved_highlight = tp->highlight; | |
1411 | tp->saved_f_color = tp->f_color; | |
1412 | break; | |
1413 | case '8': /* Restore cursor position. */ | |
1414 | tty3270_convert_line(tp, tp->cy); | |
1415 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1416 | tp->highlight = tp->saved_highlight; | |
1417 | tp->f_color = tp->saved_f_color; | |
1418 | break; | |
1419 | case 'c': /* Reset terminal. */ | |
1420 | tp->cx = tp->saved_cx = 0; | |
1421 | tp->cy = tp->saved_cy = 0; | |
1422 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1423 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1424 | tty3270_erase_display(tp, 2); | |
1425 | break; | |
1426 | } | |
1427 | return; | |
1428 | } | |
1429 | if (tp->esc_state == ESsquare) { | |
1430 | tp->esc_state = ESgetpars; | |
1431 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1432 | tp->esc_npar = 0; | |
1433 | tp->esc_ques = (ch == '?'); | |
1434 | if (tp->esc_ques) | |
1435 | return; | |
1436 | } | |
1437 | if (tp->esc_state == ESgetpars) { | |
1438 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { | |
1439 | tp->esc_npar++; | |
1440 | return; | |
1441 | } | |
1442 | if (ch >= '0' && ch <= '9') { | |
1443 | tp->esc_par[tp->esc_npar] *= 10; | |
1444 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1445 | return; | |
1446 | } | |
1447 | } | |
1448 | tp->esc_state = ESnormal; | |
1449 | if (ch == 'n' && !tp->esc_ques) { | |
1450 | if (tp->esc_par[0] == 5) /* Status report. */ | |
1451 | kbd_puts_queue(tp->tty, "\033[0n"); | |
1452 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ | |
1453 | char buf[40]; | |
1454 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
1455 | kbd_puts_queue(tp->tty, buf); | |
1456 | } | |
1457 | return; | |
1458 | } | |
1459 | if (tp->esc_ques) | |
1460 | return; | |
1461 | switch (ch) { | |
1462 | case 'm': | |
1463 | tty3270_set_attributes(tp); | |
1464 | break; | |
1465 | case 'H': /* Set cursor position. */ | |
1466 | case 'f': | |
1467 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1468 | tty3270_getpar(tp, 0) - 1); | |
1469 | break; | |
1470 | case 'd': /* Set y position. */ | |
1471 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1472 | break; | |
1473 | case 'A': /* Cursor up. */ | |
1474 | case 'F': | |
1475 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1476 | break; | |
1477 | case 'B': /* Cursor down. */ | |
1478 | case 'e': | |
1479 | case 'E': | |
1480 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1481 | break; | |
1482 | case 'C': /* Cursor forward. */ | |
1483 | case 'a': | |
1484 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1485 | break; | |
1486 | case 'D': /* Cursor backward. */ | |
1487 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1488 | break; | |
1489 | case 'G': /* Set x position. */ | |
1490 | case '`': | |
1491 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1492 | break; | |
1493 | case 'X': /* Erase Characters. */ | |
1494 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1495 | break; | |
1496 | case 'J': /* Erase display. */ | |
1497 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1498 | break; | |
1499 | case 'K': /* Erase line. */ | |
1500 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1501 | break; | |
1502 | case 'P': /* Delete characters. */ | |
1503 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1504 | break; | |
1505 | case '@': /* Insert characters. */ | |
1506 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1507 | break; | |
1508 | case 's': /* Save cursor position. */ | |
1509 | tp->saved_cx = tp->cx; | |
1510 | tp->saved_cy = tp->cy; | |
1511 | tp->saved_highlight = tp->highlight; | |
1512 | tp->saved_f_color = tp->f_color; | |
1513 | break; | |
1514 | case 'u': /* Restore cursor position. */ | |
1515 | tty3270_convert_line(tp, tp->cy); | |
1516 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1517 | tp->highlight = tp->saved_highlight; | |
1518 | tp->f_color = tp->saved_f_color; | |
1519 | break; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * String write routine for 3270 ttys | |
1525 | */ | |
1526 | static void | |
1527 | tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count) | |
1528 | { | |
1529 | int i_msg, i; | |
1530 | ||
1531 | spin_lock_bh(&tp->view.lock); | |
1532 | for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) { | |
1533 | if (tp->esc_state != 0) { | |
1534 | /* Continue escape sequence. */ | |
1535 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1536 | continue; | |
1537 | } | |
1538 | ||
1539 | switch (buf[i_msg]) { | |
1540 | case 0x07: /* '\a' -- Alarm */ | |
1541 | tp->wcc |= TW_PLUSALARM; | |
1542 | break; | |
1543 | case 0x08: /* Backspace. */ | |
1544 | if (tp->cx > 0) { | |
1545 | tp->cx--; | |
1546 | tty3270_put_character(tp, ' '); | |
1547 | } | |
1548 | break; | |
1549 | case 0x09: /* '\t' -- Tabulate */ | |
1550 | for (i = tp->cx % 8; i < 8; i++) { | |
1551 | if (tp->cx >= tp->view.cols) { | |
1552 | tty3270_cr(tp); | |
1553 | tty3270_lf(tp); | |
1554 | break; | |
1555 | } | |
1556 | tty3270_put_character(tp, ' '); | |
1557 | tp->cx++; | |
1558 | } | |
1559 | break; | |
1560 | case 0x0a: /* '\n' -- New Line */ | |
1561 | tty3270_cr(tp); | |
1562 | tty3270_lf(tp); | |
1563 | break; | |
1564 | case 0x0c: /* '\f' -- Form Feed */ | |
1565 | tty3270_erase_display(tp, 2); | |
1566 | tp->cx = tp->cy = 0; | |
1567 | break; | |
1568 | case 0x0d: /* '\r' -- Carriage Return */ | |
1569 | tp->cx = 0; | |
1570 | break; | |
1571 | case 0x0f: /* SuSE "exit alternate mode" */ | |
1572 | break; | |
1573 | case 0x1b: /* Start escape sequence. */ | |
1574 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1575 | break; | |
1576 | default: /* Insert normal character. */ | |
1577 | if (tp->cx >= tp->view.cols) { | |
1578 | tty3270_cr(tp); | |
1579 | tty3270_lf(tp); | |
1580 | } | |
1581 | tty3270_put_character(tp, buf[i_msg]); | |
1582 | tp->cx++; | |
1583 | break; | |
1584 | } | |
1585 | } | |
1586 | /* Convert current line to 3270 data fragment. */ | |
1587 | tty3270_convert_line(tp, tp->cy); | |
1588 | ||
1589 | /* Setup timer to update display after 1/10 second */ | |
1590 | if (!timer_pending(&tp->timer)) | |
1591 | tty3270_set_timer(tp, HZ/10); | |
1592 | ||
1593 | spin_unlock_bh(&tp->view.lock); | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * String write routine for 3270 ttys | |
1598 | */ | |
1599 | static int | |
1600 | tty3270_write(struct tty_struct * tty, | |
1601 | const unsigned char *buf, int count) | |
1602 | { | |
1603 | struct tty3270 *tp; | |
1604 | ||
1605 | tp = tty->driver_data; | |
1606 | if (!tp) | |
1607 | return 0; | |
1608 | if (tp->char_count > 0) { | |
1609 | tty3270_do_write(tp, tp->char_buf, tp->char_count); | |
1610 | tp->char_count = 0; | |
1611 | } | |
1612 | tty3270_do_write(tp, buf, count); | |
1613 | return count; | |
1614 | } | |
1615 | ||
1616 | /* | |
1617 | * Put single characters to the ttys character buffer | |
1618 | */ | |
1619 | static void | |
1620 | tty3270_put_char(struct tty_struct *tty, unsigned char ch) | |
1621 | { | |
1622 | struct tty3270 *tp; | |
1623 | ||
1624 | tp = tty->driver_data; | |
1625 | if (!tp) | |
1626 | return; | |
1627 | if (tp->char_count < TTY3270_CHAR_BUF_SIZE) | |
1628 | tp->char_buf[tp->char_count++] = ch; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Flush all characters from the ttys characeter buffer put there | |
1633 | * by tty3270_put_char. | |
1634 | */ | |
1635 | static void | |
1636 | tty3270_flush_chars(struct tty_struct *tty) | |
1637 | { | |
1638 | struct tty3270 *tp; | |
1639 | ||
1640 | tp = tty->driver_data; | |
1641 | if (!tp) | |
1642 | return; | |
1643 | if (tp->char_count > 0) { | |
1644 | tty3270_do_write(tp, tp->char_buf, tp->char_count); | |
1645 | tp->char_count = 0; | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * Returns the number of characters in the output buffer. This is | |
1651 | * used in tty_wait_until_sent to wait until all characters have | |
1652 | * appeared on the screen. | |
1653 | */ | |
1654 | static int | |
1655 | tty3270_chars_in_buffer(struct tty_struct *tty) | |
1656 | { | |
1657 | return 0; | |
1658 | } | |
1659 | ||
1660 | static void | |
1661 | tty3270_flush_buffer(struct tty_struct *tty) | |
1662 | { | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Check for visible/invisible input switches | |
1667 | */ | |
1668 | static void | |
1669 | tty3270_set_termios(struct tty_struct *tty, struct termios *old) | |
1670 | { | |
1671 | struct tty3270 *tp; | |
1672 | int new; | |
1673 | ||
1674 | tp = tty->driver_data; | |
1675 | if (!tp) | |
1676 | return; | |
1677 | spin_lock_bh(&tp->view.lock); | |
1678 | if (L_ICANON(tty)) { | |
1679 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1680 | if (new != tp->inattr) { | |
1681 | tp->inattr = new; | |
1682 | tty3270_update_prompt(tp, 0, 0); | |
1683 | tty3270_set_timer(tp, 1); | |
1684 | } | |
1685 | } | |
1686 | spin_unlock_bh(&tp->view.lock); | |
1687 | } | |
1688 | ||
1689 | /* | |
1690 | * Disable reading from a 3270 tty | |
1691 | */ | |
1692 | static void | |
1693 | tty3270_throttle(struct tty_struct * tty) | |
1694 | { | |
1695 | struct tty3270 *tp; | |
1696 | ||
1697 | tp = tty->driver_data; | |
1698 | if (!tp) | |
1699 | return; | |
1700 | tp->throttle = 1; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * Enable reading from a 3270 tty | |
1705 | */ | |
1706 | static void | |
1707 | tty3270_unthrottle(struct tty_struct * tty) | |
1708 | { | |
1709 | struct tty3270 *tp; | |
1710 | ||
1711 | tp = tty->driver_data; | |
1712 | if (!tp) | |
1713 | return; | |
1714 | tp->throttle = 0; | |
1715 | if (tp->attn) | |
1716 | tty3270_issue_read(tp, 1); | |
1717 | } | |
1718 | ||
1719 | /* | |
1720 | * Hang up the tty device. | |
1721 | */ | |
1722 | static void | |
1723 | tty3270_hangup(struct tty_struct *tty) | |
1724 | { | |
1725 | // FIXME: implement | |
1726 | } | |
1727 | ||
1728 | static void | |
1729 | tty3270_wait_until_sent(struct tty_struct *tty, int timeout) | |
1730 | { | |
1731 | } | |
1732 | ||
1733 | static int | |
1734 | tty3270_ioctl(struct tty_struct *tty, struct file *file, | |
1735 | unsigned int cmd, unsigned long arg) | |
1736 | { | |
1737 | struct tty3270 *tp; | |
1738 | ||
1739 | tp = tty->driver_data; | |
1740 | if (!tp) | |
1741 | return -ENODEV; | |
1742 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1743 | return -EIO; | |
1744 | return kbd_ioctl(tp->kbd, file, cmd, arg); | |
1745 | } | |
1746 | ||
1747 | static struct tty_operations tty3270_ops = { | |
1748 | .open = tty3270_open, | |
1749 | .close = tty3270_close, | |
1750 | .write = tty3270_write, | |
1751 | .put_char = tty3270_put_char, | |
1752 | .flush_chars = tty3270_flush_chars, | |
1753 | .write_room = tty3270_write_room, | |
1754 | .chars_in_buffer = tty3270_chars_in_buffer, | |
1755 | .flush_buffer = tty3270_flush_buffer, | |
1756 | .throttle = tty3270_throttle, | |
1757 | .unthrottle = tty3270_unthrottle, | |
1758 | .hangup = tty3270_hangup, | |
1759 | .wait_until_sent = tty3270_wait_until_sent, | |
1760 | .ioctl = tty3270_ioctl, | |
1761 | .set_termios = tty3270_set_termios | |
1762 | }; | |
1763 | ||
1764 | void | |
1765 | tty3270_notifier(int index, int active) | |
1766 | { | |
1767 | if (active) | |
1768 | tty_register_device(tty3270_driver, index, 0); | |
1769 | else | |
1770 | tty_unregister_device(tty3270_driver, index); | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * 3270 tty registration code called from tty_init(). | |
1775 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1776 | */ | |
1777 | int __init | |
1778 | tty3270_init(void) | |
1779 | { | |
1780 | struct tty_driver *driver; | |
1781 | int ret; | |
1782 | ||
1783 | driver = alloc_tty_driver(256); | |
1784 | if (!driver) | |
1785 | return -ENOMEM; | |
1786 | ||
1787 | /* | |
1788 | * Initialize the tty_driver structure | |
1789 | * Entries in tty3270_driver that are NOT initialized: | |
1790 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1791 | */ | |
1792 | driver->owner = THIS_MODULE; | |
1793 | driver->devfs_name = "ttyTUB/"; | |
1794 | driver->driver_name = "ttyTUB"; | |
1795 | driver->name = "ttyTUB"; | |
1796 | driver->major = IBM_TTY3270_MAJOR; | |
1797 | driver->type = TTY_DRIVER_TYPE_SYSTEM; | |
1798 | driver->subtype = SYSTEM_TYPE_TTY; | |
1799 | driver->init_termios = tty_std_termios; | |
1800 | driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS; | |
1801 | tty_set_operations(driver, &tty3270_ops); | |
1802 | ret = tty_register_driver(driver); | |
1803 | if (ret) { | |
1804 | printk(KERN_ERR "tty3270 registration failed with %d\n", ret); | |
1805 | put_tty_driver(driver); | |
1806 | return ret; | |
1807 | } | |
1808 | tty3270_driver = driver; | |
1809 | ret = raw3270_register_notifier(tty3270_notifier); | |
1810 | if (ret) { | |
1811 | printk(KERN_ERR "tty3270 notifier registration failed " | |
1812 | "with %d\n", ret); | |
1813 | put_tty_driver(driver); | |
1814 | return ret; | |
1815 | ||
1816 | } | |
1817 | return 0; | |
1818 | } | |
1819 | ||
1820 | static void __exit | |
1821 | tty3270_exit(void) | |
1822 | { | |
1823 | struct tty_driver *driver; | |
1824 | ||
1825 | raw3270_unregister_notifier(tty3270_notifier); | |
1826 | driver = tty3270_driver; | |
1827 | tty3270_driver = 0; | |
1828 | tty_unregister_driver(driver); | |
1829 | tty3270_del_views(); | |
1830 | } | |
1831 | ||
1832 | MODULE_LICENSE("GPL"); | |
1833 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
1834 | ||
1835 | module_init(tty3270_init); | |
1836 | module_exit(tty3270_exit); |