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 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/kdev_t.h> | |
14 | #include <linux/tty.h> | |
15 | #include <linux/vt_kern.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/console.h> | |
18 | #include <linux/interrupt.h> | |
19 | ||
20 | #include <linux/slab.h> | |
21 | #include <linux/bootmem.h> | |
22 | ||
23 | #include <asm/ccwdev.h> | |
24 | #include <asm/cio.h> | |
25 | #include <asm/ebcdic.h> | |
26 | #include <asm/uaccess.h> | |
27 | ||
28 | ||
29 | #include "raw3270.h" | |
30 | #include "keyboard.h" | |
31 | ||
32 | #define TTY3270_CHAR_BUF_SIZE 256 | |
33 | #define TTY3270_OUTPUT_BUFFER_SIZE 1024 | |
34 | #define TTY3270_STRING_PAGES 5 | |
35 | ||
36 | struct tty_driver *tty3270_driver; | |
37 | static int tty3270_max_index; | |
38 | ||
39 | struct raw3270_fn tty3270_fn; | |
40 | ||
41 | struct tty3270_cell { | |
42 | unsigned char character; | |
43 | unsigned char highlight; | |
44 | unsigned char f_color; | |
45 | }; | |
46 | ||
47 | struct tty3270_line { | |
48 | struct tty3270_cell *cells; | |
49 | int len; | |
50 | }; | |
51 | ||
52 | #define ESCAPE_NPAR 8 | |
53 | ||
54 | /* | |
55 | * The main tty view data structure. | |
56 | * FIXME: | |
57 | * 1) describe line orientation & lines list concept against screen | |
58 | * 2) describe conversion of screen to lines | |
59 | * 3) describe line format. | |
60 | */ | |
61 | struct tty3270 { | |
62 | struct raw3270_view view; | |
63 | struct tty_struct *tty; /* Pointer to tty structure */ | |
64 | void **freemem_pages; /* Array of pages used for freemem. */ | |
65 | struct list_head freemem; /* List of free memory for strings. */ | |
66 | ||
67 | /* Output stuff. */ | |
68 | struct list_head lines; /* List of lines. */ | |
69 | struct list_head update; /* List of lines to update. */ | |
70 | unsigned char wcc; /* Write control character. */ | |
71 | int nr_lines; /* # lines in list. */ | |
72 | int nr_up; /* # lines up in history. */ | |
73 | unsigned long update_flags; /* Update indication bits. */ | |
74 | struct string *status; /* Lower right of display. */ | |
75 | struct raw3270_request *write; /* Single write request. */ | |
76 | struct timer_list timer; /* Output delay timer. */ | |
77 | ||
78 | /* Current tty screen. */ | |
79 | unsigned int cx, cy; /* Current output position. */ | |
80 | unsigned int highlight; /* Blink/reverse/underscore */ | |
81 | unsigned int f_color; /* Foreground color */ | |
82 | struct tty3270_line *screen; | |
83 | ||
84 | /* Input stuff. */ | |
85 | struct string *prompt; /* Output string for input area. */ | |
86 | struct string *input; /* Input string for read request. */ | |
87 | struct raw3270_request *read; /* Single read request. */ | |
88 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
89 | unsigned char inattr; /* Visible/invisible input. */ | |
90 | int throttle, attn; /* tty throttle/unthrottle. */ | |
91 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
92 | struct kbd_data *kbd; /* key_maps stuff. */ | |
93 | ||
94 | /* Escape sequence parsing. */ | |
95 | int esc_state, esc_ques, esc_npar; | |
96 | int esc_par[ESCAPE_NPAR]; | |
97 | unsigned int saved_cx, saved_cy; | |
98 | unsigned int saved_highlight, saved_f_color; | |
99 | ||
100 | /* Command recalling. */ | |
101 | struct list_head rcl_lines; /* List of recallable lines. */ | |
102 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
103 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
104 | ||
105 | /* Character array for put_char/flush_chars. */ | |
106 | unsigned int char_count; | |
107 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
108 | }; | |
109 | ||
110 | /* tty3270->update_flags. See tty3270_update for details. */ | |
111 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
112 | #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
113 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ | |
114 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
115 | #define TTY_UPDATE_ALL 15 | |
116 | ||
117 | static void tty3270_update(struct tty3270 *); | |
118 | ||
119 | /* | |
120 | * Setup timeout for a device. On timeout trigger an update. | |
121 | */ | |
122 | void | |
123 | tty3270_set_timer(struct tty3270 *tp, int expires) | |
124 | { | |
125 | if (expires == 0) { | |
126 | if (timer_pending(&tp->timer) && del_timer(&tp->timer)) | |
127 | raw3270_put_view(&tp->view); | |
128 | return; | |
129 | } | |
130 | if (timer_pending(&tp->timer) && | |
131 | mod_timer(&tp->timer, jiffies + expires)) | |
132 | return; | |
133 | raw3270_get_view(&tp->view); | |
134 | tp->timer.function = (void (*)(unsigned long)) tty3270_update; | |
135 | tp->timer.data = (unsigned long) tp; | |
136 | tp->timer.expires = jiffies + expires; | |
137 | add_timer(&tp->timer); | |
138 | } | |
139 | ||
140 | /* | |
141 | * The input line are the two last lines of the screen. | |
142 | */ | |
143 | static void | |
144 | tty3270_update_prompt(struct tty3270 *tp, char *input, int count) | |
145 | { | |
146 | struct string *line; | |
147 | unsigned int off; | |
148 | ||
149 | line = tp->prompt; | |
150 | if (count != 0) | |
151 | line->string[5] = TF_INMDT; | |
152 | else | |
153 | line->string[5] = tp->inattr; | |
154 | if (count > tp->view.cols * 2 - 11) | |
155 | count = tp->view.cols * 2 - 11; | |
156 | memcpy(line->string + 6, input, count); | |
157 | line->string[6 + count] = TO_IC; | |
158 | /* Clear to end of input line. */ | |
159 | if (count < tp->view.cols * 2 - 11) { | |
160 | line->string[7 + count] = TO_RA; | |
161 | line->string[10 + count] = 0; | |
162 | off = tp->view.cols * tp->view.rows - 9; | |
163 | raw3270_buffer_address(tp->view.dev, line->string+count+8, off); | |
164 | line->len = 11 + count; | |
165 | } else | |
166 | line->len = 7 + count; | |
167 | tp->update_flags |= TTY_UPDATE_INPUT; | |
168 | } | |
169 | ||
170 | static void | |
171 | tty3270_create_prompt(struct tty3270 *tp) | |
172 | { | |
173 | static const unsigned char blueprint[] = | |
174 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
175 | /* empty input string */ | |
176 | TO_IC, TO_RA, 0, 0, 0 }; | |
177 | struct string *line; | |
178 | unsigned int offset; | |
179 | ||
180 | line = alloc_string(&tp->freemem, | |
181 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
182 | tp->prompt = line; | |
183 | tp->inattr = TF_INPUT; | |
184 | /* Copy blueprint to status line */ | |
185 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
186 | line->len = sizeof(blueprint); | |
187 | /* Set output offsets. */ | |
188 | offset = tp->view.cols * (tp->view.rows - 2); | |
189 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
190 | offset = tp->view.cols * tp->view.rows - 9; | |
191 | raw3270_buffer_address(tp->view.dev, line->string + 8, offset); | |
192 | ||
193 | /* Allocate input string for reading. */ | |
194 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
195 | } | |
196 | ||
197 | /* | |
198 | * The status line is the last line of the screen. It shows the string | |
199 | * "Running"/"Holding" in the lower right corner of the screen. | |
200 | */ | |
201 | static void | |
202 | tty3270_update_status(struct tty3270 * tp) | |
203 | { | |
204 | char *str; | |
205 | ||
206 | str = (tp->nr_up != 0) ? "History" : "Running"; | |
207 | memcpy(tp->status->string + 8, str, 7); | |
208 | codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); | |
209 | tp->update_flags |= TTY_UPDATE_STATUS; | |
210 | } | |
211 | ||
212 | static void | |
213 | tty3270_create_status(struct tty3270 * tp) | |
214 | { | |
215 | static const unsigned char blueprint[] = | |
216 | { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, | |
217 | 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, | |
218 | TAC_RESET }; | |
219 | struct string *line; | |
220 | unsigned int offset; | |
221 | ||
222 | line = alloc_string(&tp->freemem,sizeof(blueprint)); | |
223 | tp->status = line; | |
224 | /* Copy blueprint to status line */ | |
225 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
226 | /* Set address to start of status string (= last 9 characters). */ | |
227 | offset = tp->view.cols * tp->view.rows - 9; | |
228 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
229 | } | |
230 | ||
231 | /* | |
232 | * Set output offsets to 3270 datastream fragment of a tty string. | |
233 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
234 | */ | |
235 | static void | |
236 | tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) | |
237 | { | |
238 | unsigned char *cp; | |
239 | ||
240 | raw3270_buffer_address(tp->view.dev, line->string + 1, | |
241 | tp->view.cols * nr); | |
242 | cp = line->string + line->len - 4; | |
243 | if (*cp == TO_RA) | |
244 | raw3270_buffer_address(tp->view.dev, cp + 1, | |
245 | tp->view.cols * (nr + 1)); | |
246 | } | |
247 | ||
248 | /* | |
249 | * Rebuild update list to print all lines. | |
250 | */ | |
251 | static void | |
252 | tty3270_rebuild_update(struct tty3270 *tp) | |
253 | { | |
254 | struct string *s, *n; | |
255 | int line, nr_up; | |
256 | ||
257 | /* | |
258 | * Throw away update list and create a new one, | |
259 | * containing all lines that will fit on the screen. | |
260 | */ | |
261 | list_for_each_entry_safe(s, n, &tp->update, update) | |
262 | list_del_init(&s->update); | |
263 | line = tp->view.rows - 3; | |
264 | nr_up = tp->nr_up; | |
265 | list_for_each_entry_reverse(s, &tp->lines, list) { | |
266 | if (nr_up > 0) { | |
267 | nr_up--; | |
268 | continue; | |
269 | } | |
270 | tty3270_update_string(tp, s, line); | |
271 | list_add(&s->update, &tp->update); | |
272 | if (--line < 0) | |
273 | break; | |
274 | } | |
275 | tp->update_flags |= TTY_UPDATE_LIST; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Alloc string for size bytes. If there is not enough room in | |
280 | * freemem, free strings until there is room. | |
281 | */ | |
282 | static struct string * | |
283 | tty3270_alloc_string(struct tty3270 *tp, size_t size) | |
284 | { | |
285 | struct string *s, *n; | |
286 | ||
287 | s = alloc_string(&tp->freemem, size); | |
288 | if (s) | |
289 | return s; | |
290 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
291 | BUG_ON(tp->nr_lines <= tp->view.rows - 2); | |
292 | list_del(&s->list); | |
293 | if (!list_empty(&s->update)) | |
294 | list_del(&s->update); | |
295 | tp->nr_lines--; | |
296 | if (free_string(&tp->freemem, s) >= size) | |
297 | break; | |
298 | } | |
299 | s = alloc_string(&tp->freemem, size); | |
300 | BUG_ON(!s); | |
301 | if (tp->nr_up != 0 && | |
302 | tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { | |
303 | tp->nr_up = tp->nr_lines - tp->view.rows + 2; | |
304 | tty3270_rebuild_update(tp); | |
305 | tty3270_update_status(tp); | |
306 | } | |
307 | return s; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Add an empty line to the list. | |
312 | */ | |
313 | static void | |
314 | tty3270_blank_line(struct tty3270 *tp) | |
315 | { | |
316 | static const unsigned char blueprint[] = | |
317 | { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, | |
318 | TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; | |
319 | struct string *s; | |
320 | ||
321 | s = tty3270_alloc_string(tp, sizeof(blueprint)); | |
322 | memcpy(s->string, blueprint, sizeof(blueprint)); | |
323 | s->len = sizeof(blueprint); | |
324 | list_add_tail(&s->list, &tp->lines); | |
325 | tp->nr_lines++; | |
326 | if (tp->nr_up != 0) | |
327 | tp->nr_up++; | |
328 | } | |
329 | ||
330 | /* | |
331 | * Write request completion callback. | |
332 | */ | |
333 | static void | |
334 | tty3270_write_callback(struct raw3270_request *rq, void *data) | |
335 | { | |
336 | struct tty3270 *tp; | |
337 | ||
338 | tp = (struct tty3270 *) rq->view; | |
339 | if (rq->rc != 0) { | |
340 | /* Write wasn't successfull. Refresh all. */ | |
341 | tty3270_rebuild_update(tp); | |
342 | tp->update_flags = TTY_UPDATE_ALL; | |
343 | tty3270_set_timer(tp, 1); | |
344 | } | |
345 | raw3270_request_reset(rq); | |
346 | xchg(&tp->write, rq); | |
347 | } | |
348 | ||
349 | /* | |
350 | * Update 3270 display. | |
351 | */ | |
352 | static void | |
353 | tty3270_update(struct tty3270 *tp) | |
354 | { | |
355 | static char invalid_sba[2] = { 0xff, 0xff }; | |
356 | struct raw3270_request *wrq; | |
357 | unsigned long updated; | |
358 | struct string *s, *n; | |
359 | char *sba, *str; | |
360 | int rc, len; | |
361 | ||
362 | wrq = xchg(&tp->write, 0); | |
363 | if (!wrq) { | |
364 | tty3270_set_timer(tp, 1); | |
365 | return; | |
366 | } | |
367 | ||
368 | spin_lock(&tp->view.lock); | |
369 | updated = 0; | |
370 | if (tp->update_flags & TTY_UPDATE_ERASE) { | |
371 | /* Use erase write alternate to erase display. */ | |
372 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
373 | updated |= TTY_UPDATE_ERASE; | |
374 | } else | |
375 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
376 | ||
377 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
378 | tp->wcc = TW_NONE; | |
379 | ||
380 | /* | |
381 | * Update status line. | |
382 | */ | |
383 | if (tp->update_flags & TTY_UPDATE_STATUS) | |
384 | if (raw3270_request_add_data(wrq, tp->status->string, | |
385 | tp->status->len) == 0) | |
386 | updated |= TTY_UPDATE_STATUS; | |
387 | ||
388 | /* | |
389 | * Write input line. | |
390 | */ | |
391 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
392 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
393 | tp->prompt->len) == 0) | |
394 | updated |= TTY_UPDATE_INPUT; | |
395 | ||
396 | sba = invalid_sba; | |
397 | ||
398 | if (tp->update_flags & TTY_UPDATE_LIST) { | |
399 | /* Write strings in the update list to the screen. */ | |
400 | list_for_each_entry_safe(s, n, &tp->update, update) { | |
401 | str = s->string; | |
402 | len = s->len; | |
403 | /* | |
404 | * Skip TO_SBA at the start of the string if the | |
405 | * last output position matches the start address | |
406 | * of this line. | |
407 | */ | |
408 | if (s->string[1] == sba[0] && s->string[2] == sba[1]) | |
409 | str += 3, len -= 3; | |
410 | if (raw3270_request_add_data(wrq, str, len) != 0) | |
411 | break; | |
412 | list_del_init(&s->update); | |
413 | sba = s->string + s->len - 3; | |
414 | } | |
415 | if (list_empty(&tp->update)) | |
416 | updated |= TTY_UPDATE_LIST; | |
417 | } | |
418 | wrq->callback = tty3270_write_callback; | |
419 | rc = raw3270_start(&tp->view, wrq); | |
420 | if (rc == 0) { | |
421 | tp->update_flags &= ~updated; | |
422 | if (tp->update_flags) | |
423 | tty3270_set_timer(tp, 1); | |
424 | } else { | |
425 | raw3270_request_reset(wrq); | |
426 | xchg(&tp->write, wrq); | |
427 | } | |
428 | spin_unlock(&tp->view.lock); | |
429 | raw3270_put_view(&tp->view); | |
430 | } | |
431 | ||
432 | /* | |
433 | * Command recalling. | |
434 | */ | |
435 | static void | |
436 | tty3270_rcl_add(struct tty3270 *tp, char *input, int len) | |
437 | { | |
438 | struct string *s; | |
439 | ||
d2c993d8 | 440 | tp->rcl_walk = NULL; |
1da177e4 LT |
441 | if (len <= 0) |
442 | return; | |
443 | if (tp->rcl_nr >= tp->rcl_max) { | |
444 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
445 | list_del(&s->list); | |
446 | free_string(&tp->freemem, s); | |
447 | tp->rcl_nr--; | |
448 | } | |
449 | s = tty3270_alloc_string(tp, len); | |
450 | memcpy(s->string, input, len); | |
451 | list_add_tail(&s->list, &tp->rcl_lines); | |
452 | tp->rcl_nr++; | |
453 | } | |
454 | ||
455 | static void | |
456 | tty3270_rcl_backward(struct kbd_data *kbd) | |
457 | { | |
458 | struct tty3270 *tp; | |
459 | struct string *s; | |
460 | ||
461 | tp = kbd->tty->driver_data; | |
462 | spin_lock_bh(&tp->view.lock); | |
463 | if (tp->inattr == TF_INPUT) { | |
464 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
465 | tp->rcl_walk = tp->rcl_walk->prev; | |
466 | else if (!list_empty(&tp->rcl_lines)) | |
467 | tp->rcl_walk = tp->rcl_lines.prev; | |
468 | s = tp->rcl_walk ? | |
d2c993d8 | 469 | list_entry(tp->rcl_walk, struct string, list) : NULL; |
1da177e4 LT |
470 | if (tp->rcl_walk) { |
471 | s = list_entry(tp->rcl_walk, struct string, list); | |
472 | tty3270_update_prompt(tp, s->string, s->len); | |
473 | } else | |
d2c993d8 | 474 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
475 | tty3270_set_timer(tp, 1); |
476 | } | |
477 | spin_unlock_bh(&tp->view.lock); | |
478 | } | |
479 | ||
480 | /* | |
481 | * Deactivate tty view. | |
482 | */ | |
483 | static void | |
484 | tty3270_exit_tty(struct kbd_data *kbd) | |
485 | { | |
486 | struct tty3270 *tp; | |
487 | ||
488 | tp = kbd->tty->driver_data; | |
489 | raw3270_deactivate_view(&tp->view); | |
490 | } | |
491 | ||
492 | /* | |
493 | * Scroll forward in history. | |
494 | */ | |
495 | static void | |
496 | tty3270_scroll_forward(struct kbd_data *kbd) | |
497 | { | |
498 | struct tty3270 *tp; | |
499 | int nr_up; | |
500 | ||
501 | tp = kbd->tty->driver_data; | |
502 | spin_lock_bh(&tp->view.lock); | |
503 | nr_up = tp->nr_up - tp->view.rows + 2; | |
504 | if (nr_up < 0) | |
505 | nr_up = 0; | |
506 | if (nr_up != tp->nr_up) { | |
507 | tp->nr_up = nr_up; | |
508 | tty3270_rebuild_update(tp); | |
509 | tty3270_update_status(tp); | |
510 | tty3270_set_timer(tp, 1); | |
511 | } | |
512 | spin_unlock_bh(&tp->view.lock); | |
513 | } | |
514 | ||
515 | /* | |
516 | * Scroll backward in history. | |
517 | */ | |
518 | static void | |
519 | tty3270_scroll_backward(struct kbd_data *kbd) | |
520 | { | |
521 | struct tty3270 *tp; | |
522 | int nr_up; | |
523 | ||
524 | tp = kbd->tty->driver_data; | |
525 | spin_lock_bh(&tp->view.lock); | |
526 | nr_up = tp->nr_up + tp->view.rows - 2; | |
527 | if (nr_up + tp->view.rows - 2 > tp->nr_lines) | |
528 | nr_up = tp->nr_lines - tp->view.rows + 2; | |
529 | if (nr_up != tp->nr_up) { | |
530 | tp->nr_up = nr_up; | |
531 | tty3270_rebuild_update(tp); | |
532 | tty3270_update_status(tp); | |
533 | tty3270_set_timer(tp, 1); | |
534 | } | |
535 | spin_unlock_bh(&tp->view.lock); | |
536 | } | |
537 | ||
538 | /* | |
539 | * Pass input line to tty. | |
540 | */ | |
541 | static void | |
542 | tty3270_read_tasklet(struct raw3270_request *rrq) | |
543 | { | |
544 | static char kreset_data = TW_KR; | |
545 | struct tty3270 *tp; | |
546 | char *input; | |
547 | int len; | |
548 | ||
549 | tp = (struct tty3270 *) rrq->view; | |
550 | spin_lock_bh(&tp->view.lock); | |
551 | /* | |
552 | * Two AID keys are special: For 0x7d (enter) the input line | |
553 | * has to be emitted to the tty and for 0x6d the screen | |
554 | * needs to be redrawn. | |
555 | */ | |
d2c993d8 | 556 | input = NULL; |
1da177e4 LT |
557 | len = 0; |
558 | if (tp->input->string[0] == 0x7d) { | |
559 | /* Enter: write input to tty. */ | |
560 | input = tp->input->string + 6; | |
561 | len = tp->input->len - 6 - rrq->rescnt; | |
562 | if (tp->inattr != TF_INPUTN) | |
563 | tty3270_rcl_add(tp, input, len); | |
564 | if (tp->nr_up > 0) { | |
565 | tp->nr_up = 0; | |
566 | tty3270_rebuild_update(tp); | |
567 | tty3270_update_status(tp); | |
568 | } | |
569 | /* Clear input area. */ | |
d2c993d8 | 570 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
571 | tty3270_set_timer(tp, 1); |
572 | } else if (tp->input->string[0] == 0x6d) { | |
573 | /* Display has been cleared. Redraw. */ | |
574 | tty3270_rebuild_update(tp); | |
575 | tp->update_flags = TTY_UPDATE_ALL; | |
576 | tty3270_set_timer(tp, 1); | |
577 | } | |
578 | spin_unlock_bh(&tp->view.lock); | |
579 | ||
580 | /* Start keyboard reset command. */ | |
581 | raw3270_request_reset(tp->kreset); | |
582 | raw3270_request_set_cmd(tp->kreset, TC_WRITE); | |
583 | raw3270_request_add_data(tp->kreset, &kreset_data, 1); | |
584 | raw3270_start(&tp->view, tp->kreset); | |
585 | ||
586 | /* Emit input string. */ | |
587 | if (tp->tty) { | |
588 | while (len-- > 0) | |
589 | kbd_keycode(tp->kbd, *input++); | |
590 | /* Emit keycode for AID byte. */ | |
591 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
592 | } | |
593 | ||
594 | raw3270_request_reset(rrq); | |
595 | xchg(&tp->read, rrq); | |
596 | raw3270_put_view(&tp->view); | |
597 | } | |
598 | ||
599 | /* | |
600 | * Read request completion callback. | |
601 | */ | |
602 | static void | |
603 | tty3270_read_callback(struct raw3270_request *rq, void *data) | |
604 | { | |
605 | raw3270_get_view(rq->view); | |
606 | /* Schedule tasklet to pass input to tty. */ | |
607 | tasklet_schedule(&((struct tty3270 *) rq->view)->readlet); | |
608 | } | |
609 | ||
610 | /* | |
611 | * Issue a read request. Call with device lock. | |
612 | */ | |
613 | static void | |
614 | tty3270_issue_read(struct tty3270 *tp, int lock) | |
615 | { | |
616 | struct raw3270_request *rrq; | |
617 | int rc; | |
618 | ||
619 | rrq = xchg(&tp->read, 0); | |
620 | if (!rrq) | |
621 | /* Read already scheduled. */ | |
622 | return; | |
623 | rrq->callback = tty3270_read_callback; | |
624 | rrq->callback_data = tp; | |
625 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
626 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
627 | /* Issue the read modified request. */ | |
628 | if (lock) { | |
629 | rc = raw3270_start(&tp->view, rrq); | |
630 | } else | |
631 | rc = raw3270_start_irq(&tp->view, rrq); | |
632 | if (rc) { | |
633 | raw3270_request_reset(rrq); | |
634 | xchg(&tp->read, rrq); | |
635 | } | |
636 | } | |
637 | ||
638 | /* | |
639 | * Switch to the tty view. | |
640 | */ | |
641 | static int | |
642 | tty3270_activate(struct raw3270_view *view) | |
643 | { | |
644 | struct tty3270 *tp; | |
645 | unsigned long flags; | |
646 | ||
647 | tp = (struct tty3270 *) view; | |
648 | spin_lock_irqsave(&tp->view.lock, flags); | |
649 | tp->nr_up = 0; | |
650 | tty3270_rebuild_update(tp); | |
651 | tty3270_update_status(tp); | |
652 | tp->update_flags = TTY_UPDATE_ALL; | |
653 | tty3270_set_timer(tp, 1); | |
654 | spin_unlock_irqrestore(&tp->view.lock, flags); | |
1da177e4 LT |
655 | return 0; |
656 | } | |
657 | ||
658 | static void | |
659 | tty3270_deactivate(struct raw3270_view *view) | |
660 | { | |
1da177e4 LT |
661 | } |
662 | ||
663 | static int | |
664 | tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) | |
665 | { | |
666 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
667 | if (irb->scsw.dstat & DEV_STAT_ATTENTION) { | |
668 | if (!tp->throttle) | |
669 | tty3270_issue_read(tp, 0); | |
670 | else | |
671 | tp->attn = 1; | |
672 | } | |
673 | ||
674 | if (rq) { | |
675 | if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) | |
676 | rq->rc = -EIO; | |
677 | else | |
678 | /* Normal end. Copy residual count. */ | |
679 | rq->rescnt = irb->scsw.count; | |
680 | } | |
681 | return RAW3270_IO_DONE; | |
682 | } | |
683 | ||
684 | /* | |
685 | * Allocate tty3270 structure. | |
686 | */ | |
687 | static struct tty3270 * | |
688 | tty3270_alloc_view(void) | |
689 | { | |
690 | struct tty3270 *tp; | |
691 | int pages; | |
692 | ||
88abaab4 | 693 | tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
1da177e4 LT |
694 | if (!tp) |
695 | goto out_err; | |
1da177e4 LT |
696 | tp->freemem_pages = |
697 | kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL); | |
698 | if (!tp->freemem_pages) | |
699 | goto out_tp; | |
700 | INIT_LIST_HEAD(&tp->freemem); | |
701 | init_timer(&tp->timer); | |
702 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { | |
703 | tp->freemem_pages[pages] = (void *) | |
704 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
705 | if (!tp->freemem_pages[pages]) | |
706 | goto out_pages; | |
707 | add_string_memory(&tp->freemem, | |
708 | tp->freemem_pages[pages], PAGE_SIZE); | |
709 | } | |
710 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
ed3cb6f0 | 711 | if (IS_ERR(tp->write)) |
1da177e4 LT |
712 | goto out_pages; |
713 | tp->read = raw3270_request_alloc(0); | |
ed3cb6f0 | 714 | if (IS_ERR(tp->read)) |
1da177e4 LT |
715 | goto out_write; |
716 | tp->kreset = raw3270_request_alloc(1); | |
ed3cb6f0 | 717 | if (IS_ERR(tp->kreset)) |
1da177e4 LT |
718 | goto out_read; |
719 | tp->kbd = kbd_alloc(); | |
720 | if (!tp->kbd) | |
721 | goto out_reset; | |
722 | return tp; | |
723 | ||
724 | out_reset: | |
725 | raw3270_request_free(tp->kreset); | |
726 | out_read: | |
727 | raw3270_request_free(tp->read); | |
728 | out_write: | |
729 | raw3270_request_free(tp->write); | |
730 | out_pages: | |
731 | while (pages--) | |
732 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
733 | kfree(tp->freemem_pages); | |
734 | out_tp: | |
735 | kfree(tp); | |
736 | out_err: | |
737 | return ERR_PTR(-ENOMEM); | |
738 | } | |
739 | ||
740 | /* | |
741 | * Free tty3270 structure. | |
742 | */ | |
743 | static void | |
744 | tty3270_free_view(struct tty3270 *tp) | |
745 | { | |
746 | int pages; | |
747 | ||
748 | kbd_free(tp->kbd); | |
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 | kfree(tp); | |
756 | } | |
757 | ||
758 | /* | |
759 | * Allocate tty3270 screen. | |
760 | */ | |
761 | static int | |
762 | tty3270_alloc_screen(struct tty3270 *tp) | |
763 | { | |
764 | unsigned long size; | |
765 | int lines; | |
766 | ||
767 | size = sizeof(struct tty3270_line) * (tp->view.rows - 2); | |
88abaab4 | 768 | tp->screen = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
769 | if (!tp->screen) |
770 | goto out_err; | |
1da177e4 LT |
771 | for (lines = 0; lines < tp->view.rows - 2; lines++) { |
772 | size = sizeof(struct tty3270_cell) * tp->view.cols; | |
88abaab4 | 773 | tp->screen[lines].cells = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
774 | if (!tp->screen[lines].cells) |
775 | goto out_screen; | |
1da177e4 LT |
776 | } |
777 | return 0; | |
778 | out_screen: | |
779 | while (lines--) | |
780 | kfree(tp->screen[lines].cells); | |
781 | kfree(tp->screen); | |
782 | out_err: | |
783 | return -ENOMEM; | |
784 | } | |
785 | ||
786 | /* | |
787 | * Free tty3270 screen. | |
788 | */ | |
789 | static void | |
790 | tty3270_free_screen(struct tty3270 *tp) | |
791 | { | |
792 | int lines; | |
793 | ||
794 | for (lines = 0; lines < tp->view.rows - 2; lines++) | |
795 | kfree(tp->screen[lines].cells); | |
796 | kfree(tp->screen); | |
797 | } | |
798 | ||
799 | /* | |
800 | * Unlink tty3270 data structure from tty. | |
801 | */ | |
802 | static void | |
803 | tty3270_release(struct raw3270_view *view) | |
804 | { | |
805 | struct tty3270 *tp; | |
806 | struct tty_struct *tty; | |
807 | ||
808 | tp = (struct tty3270 *) view; | |
809 | tty = tp->tty; | |
810 | if (tty) { | |
d2c993d8 HC |
811 | tty->driver_data = NULL; |
812 | tp->tty = tp->kbd->tty = NULL; | |
1da177e4 LT |
813 | tty_hangup(tty); |
814 | raw3270_put_view(&tp->view); | |
815 | } | |
816 | } | |
817 | ||
818 | /* | |
819 | * Free tty3270 data structure | |
820 | */ | |
821 | static void | |
822 | tty3270_free(struct raw3270_view *view) | |
823 | { | |
824 | tty3270_free_screen((struct tty3270 *) view); | |
825 | tty3270_free_view((struct tty3270 *) view); | |
826 | } | |
827 | ||
828 | /* | |
829 | * Delayed freeing of tty3270 views. | |
830 | */ | |
831 | static void | |
832 | tty3270_del_views(void) | |
833 | { | |
834 | struct tty3270 *tp; | |
835 | int i; | |
836 | ||
837 | for (i = 0; i < tty3270_max_index; i++) { | |
ed3cb6f0 RH |
838 | tp = (struct tty3270 *) |
839 | raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
840 | if (!IS_ERR(tp)) |
841 | raw3270_del_view(&tp->view); | |
842 | } | |
843 | } | |
844 | ||
845 | struct raw3270_fn tty3270_fn = { | |
846 | .activate = tty3270_activate, | |
847 | .deactivate = tty3270_deactivate, | |
848 | .intv = (void *) tty3270_irq, | |
849 | .release = tty3270_release, | |
850 | .free = tty3270_free | |
851 | }; | |
852 | ||
853 | /* | |
854 | * This routine is called whenever a 3270 tty is opened. | |
855 | */ | |
856 | static int | |
857 | tty3270_open(struct tty_struct *tty, struct file * filp) | |
858 | { | |
859 | struct tty3270 *tp; | |
860 | int i, rc; | |
861 | ||
862 | if (tty->count > 1) | |
863 | return 0; | |
864 | /* Check if the tty3270 is already there. */ | |
ed3cb6f0 RH |
865 | tp = (struct tty3270 *) |
866 | raw3270_find_view(&tty3270_fn, | |
867 | tty->index + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
868 | if (!IS_ERR(tp)) { |
869 | tty->driver_data = tp; | |
870 | tty->winsize.ws_row = tp->view.rows - 2; | |
871 | tty->winsize.ws_col = tp->view.cols; | |
872 | tty->low_latency = 0; | |
873 | tp->tty = tty; | |
874 | tp->kbd->tty = tty; | |
875 | tp->inattr = TF_INPUT; | |
876 | return 0; | |
877 | } | |
878 | if (tty3270_max_index < tty->index + 1) | |
879 | tty3270_max_index = tty->index + 1; | |
880 | ||
881 | /* Quick exit if there is no device for tty->index. */ | |
882 | if (PTR_ERR(tp) == -ENODEV) | |
883 | return -ENODEV; | |
884 | ||
885 | /* Allocate tty3270 structure on first open. */ | |
886 | tp = tty3270_alloc_view(); | |
887 | if (IS_ERR(tp)) | |
888 | return PTR_ERR(tp); | |
889 | ||
890 | INIT_LIST_HEAD(&tp->lines); | |
891 | INIT_LIST_HEAD(&tp->update); | |
892 | INIT_LIST_HEAD(&tp->rcl_lines); | |
893 | tp->rcl_max = 20; | |
894 | init_timer(&tp->timer); | |
895 | tasklet_init(&tp->readlet, | |
896 | (void (*)(unsigned long)) tty3270_read_tasklet, | |
897 | (unsigned long) tp->read); | |
898 | ||
ed3cb6f0 RH |
899 | rc = raw3270_add_view(&tp->view, &tty3270_fn, |
900 | tty->index + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
901 | if (rc) { |
902 | tty3270_free_view(tp); | |
903 | return rc; | |
904 | } | |
905 | ||
906 | rc = tty3270_alloc_screen(tp); | |
907 | if (rc) { | |
1da177e4 | 908 | raw3270_put_view(&tp->view); |
ed3cb6f0 | 909 | raw3270_del_view(&tp->view); |
1da177e4 LT |
910 | return rc; |
911 | } | |
912 | ||
913 | tp->tty = tty; | |
914 | tty->low_latency = 0; | |
915 | tty->driver_data = tp; | |
916 | tty->winsize.ws_row = tp->view.rows - 2; | |
917 | tty->winsize.ws_col = tp->view.cols; | |
918 | ||
919 | tty3270_create_prompt(tp); | |
920 | tty3270_create_status(tp); | |
921 | tty3270_update_status(tp); | |
922 | ||
923 | /* Create blank line for every line in the tty output area. */ | |
924 | for (i = 0; i < tp->view.rows - 2; i++) | |
925 | tty3270_blank_line(tp); | |
926 | ||
927 | tp->kbd->tty = tty; | |
928 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; | |
929 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
930 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
931 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
932 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
933 | ||
934 | raw3270_activate_view(&tp->view); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | /* | |
939 | * This routine is called when the 3270 tty is closed. We wait | |
940 | * for the remaining request to be completed. Then we clean up. | |
941 | */ | |
942 | static void | |
943 | tty3270_close(struct tty_struct *tty, struct file * filp) | |
944 | { | |
945 | struct tty3270 *tp; | |
946 | ||
947 | if (tty->count > 1) | |
948 | return; | |
949 | tp = (struct tty3270 *) tty->driver_data; | |
950 | if (tp) { | |
d2c993d8 HC |
951 | tty->driver_data = NULL; |
952 | tp->tty = tp->kbd->tty = NULL; | |
1da177e4 LT |
953 | raw3270_put_view(&tp->view); |
954 | } | |
955 | } | |
956 | ||
957 | /* | |
958 | * We always have room. | |
959 | */ | |
960 | static int | |
961 | tty3270_write_room(struct tty_struct *tty) | |
962 | { | |
963 | return INT_MAX; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Insert character into the screen at the current position with the | |
968 | * current color and highlight. This function does NOT do cursor movement. | |
969 | */ | |
970 | static void | |
971 | tty3270_put_character(struct tty3270 *tp, char ch) | |
972 | { | |
973 | struct tty3270_line *line; | |
974 | struct tty3270_cell *cell; | |
975 | ||
976 | line = tp->screen + tp->cy; | |
977 | if (line->len <= tp->cx) { | |
978 | while (line->len < tp->cx) { | |
979 | cell = line->cells + line->len; | |
980 | cell->character = tp->view.ascebc[' ']; | |
981 | cell->highlight = tp->highlight; | |
982 | cell->f_color = tp->f_color; | |
983 | line->len++; | |
984 | } | |
985 | line->len++; | |
986 | } | |
987 | cell = line->cells + tp->cx; | |
988 | cell->character = tp->view.ascebc[(unsigned int) ch]; | |
989 | cell->highlight = tp->highlight; | |
990 | cell->f_color = tp->f_color; | |
991 | } | |
992 | ||
993 | /* | |
994 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
995 | */ | |
996 | static void | |
997 | tty3270_convert_line(struct tty3270 *tp, int line_nr) | |
998 | { | |
999 | struct tty3270_line *line; | |
1000 | struct tty3270_cell *cell; | |
1001 | struct string *s, *n; | |
1002 | unsigned char highlight; | |
1003 | unsigned char f_color; | |
1004 | char *cp; | |
1005 | int flen, i; | |
1006 | ||
1007 | /* Determine how long the fragment will be. */ | |
1008 | flen = 3; /* Prefix (TO_SBA). */ | |
1009 | line = tp->screen + line_nr; | |
1010 | flen += line->len; | |
1011 | highlight = TAX_RESET; | |
1012 | f_color = TAC_RESET; | |
1013 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1014 | if (cell->highlight != highlight) { | |
1015 | flen += 3; /* TO_SA to switch highlight. */ | |
1016 | highlight = cell->highlight; | |
1017 | } | |
1018 | if (cell->f_color != f_color) { | |
1019 | flen += 3; /* TO_SA to switch color. */ | |
1020 | f_color = cell->f_color; | |
1021 | } | |
1022 | } | |
1023 | if (highlight != TAX_RESET) | |
1024 | flen += 3; /* TO_SA to reset hightlight. */ | |
1025 | if (f_color != TAC_RESET) | |
1026 | flen += 3; /* TO_SA to reset color. */ | |
1027 | if (line->len < tp->view.cols) | |
1028 | flen += 4; /* Postfix (TO_RA). */ | |
1029 | ||
1030 | /* Find the line in the list. */ | |
1031 | i = tp->view.rows - 2 - line_nr; | |
1032 | list_for_each_entry_reverse(s, &tp->lines, list) | |
1033 | if (--i <= 0) | |
1034 | break; | |
1035 | /* | |
1036 | * Check if the line needs to get reallocated. | |
1037 | */ | |
1038 | if (s->len != flen) { | |
1039 | /* Reallocate string. */ | |
1040 | n = tty3270_alloc_string(tp, flen); | |
1041 | list_add(&n->list, &s->list); | |
1042 | list_del_init(&s->list); | |
1043 | if (!list_empty(&s->update)) | |
1044 | list_del_init(&s->update); | |
1045 | free_string(&tp->freemem, s); | |
1046 | s = n; | |
1047 | } | |
1048 | ||
1049 | /* Write 3270 data fragment. */ | |
1050 | cp = s->string; | |
1051 | *cp++ = TO_SBA; | |
1052 | *cp++ = 0; | |
1053 | *cp++ = 0; | |
1054 | ||
1055 | highlight = TAX_RESET; | |
1056 | f_color = TAC_RESET; | |
1057 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1058 | if (cell->highlight != highlight) { | |
1059 | *cp++ = TO_SA; | |
1060 | *cp++ = TAT_EXTHI; | |
1061 | *cp++ = cell->highlight; | |
1062 | highlight = cell->highlight; | |
1063 | } | |
1064 | if (cell->f_color != f_color) { | |
1065 | *cp++ = TO_SA; | |
1066 | *cp++ = TAT_COLOR; | |
1067 | *cp++ = cell->f_color; | |
1068 | f_color = cell->f_color; | |
1069 | } | |
1070 | *cp++ = cell->character; | |
1071 | } | |
1072 | if (highlight != TAX_RESET) { | |
1073 | *cp++ = TO_SA; | |
1074 | *cp++ = TAT_EXTHI; | |
1075 | *cp++ = TAX_RESET; | |
1076 | } | |
1077 | if (f_color != TAC_RESET) { | |
1078 | *cp++ = TO_SA; | |
1079 | *cp++ = TAT_COLOR; | |
1080 | *cp++ = TAC_RESET; | |
1081 | } | |
1082 | if (line->len < tp->view.cols) { | |
1083 | *cp++ = TO_RA; | |
1084 | *cp++ = 0; | |
1085 | *cp++ = 0; | |
1086 | *cp++ = 0; | |
1087 | } | |
1088 | ||
1089 | if (tp->nr_up + line_nr < tp->view.rows - 2) { | |
1090 | /* Line is currently visible on screen. */ | |
1091 | tty3270_update_string(tp, s, line_nr); | |
1092 | /* Add line to update list. */ | |
1093 | if (list_empty(&s->update)) { | |
1094 | list_add_tail(&s->update, &tp->update); | |
1095 | tp->update_flags |= TTY_UPDATE_LIST; | |
1096 | } | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Do carriage return. | |
1102 | */ | |
1103 | static void | |
1104 | tty3270_cr(struct tty3270 *tp) | |
1105 | { | |
1106 | tp->cx = 0; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Do line feed. | |
1111 | */ | |
1112 | static void | |
1113 | tty3270_lf(struct tty3270 *tp) | |
1114 | { | |
1115 | struct tty3270_line temp; | |
1116 | int i; | |
1117 | ||
1118 | tty3270_convert_line(tp, tp->cy); | |
1119 | if (tp->cy < tp->view.rows - 3) { | |
1120 | tp->cy++; | |
1121 | return; | |
1122 | } | |
1123 | /* Last line just filled up. Add new, blank line. */ | |
1124 | tty3270_blank_line(tp); | |
1125 | temp = tp->screen[0]; | |
1126 | temp.len = 0; | |
1127 | for (i = 0; i < tp->view.rows - 3; i++) | |
1128 | tp->screen[i] = tp->screen[i+1]; | |
1129 | tp->screen[tp->view.rows - 3] = temp; | |
1130 | tty3270_rebuild_update(tp); | |
1131 | } | |
1132 | ||
1133 | static void | |
1134 | tty3270_ri(struct tty3270 *tp) | |
1135 | { | |
1136 | if (tp->cy > 0) { | |
1137 | tty3270_convert_line(tp, tp->cy); | |
1138 | tp->cy--; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Insert characters at current position. | |
1144 | */ | |
1145 | static void | |
1146 | tty3270_insert_characters(struct tty3270 *tp, int n) | |
1147 | { | |
1148 | struct tty3270_line *line; | |
1149 | int k; | |
1150 | ||
1151 | line = tp->screen + tp->cy; | |
1152 | while (line->len < tp->cx) { | |
1153 | line->cells[line->len].character = tp->view.ascebc[' ']; | |
1154 | line->cells[line->len].highlight = TAX_RESET; | |
1155 | line->cells[line->len].f_color = TAC_RESET; | |
1156 | line->len++; | |
1157 | } | |
1158 | if (n > tp->view.cols - tp->cx) | |
1159 | n = tp->view.cols - tp->cx; | |
1160 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1161 | while (k--) | |
1162 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1163 | line->len += n; | |
1164 | if (line->len > tp->view.cols) | |
1165 | line->len = tp->view.cols; | |
1166 | while (n-- > 0) { | |
1167 | line->cells[tp->cx + n].character = tp->view.ascebc[' ']; | |
1168 | line->cells[tp->cx + n].highlight = tp->highlight; | |
1169 | line->cells[tp->cx + n].f_color = tp->f_color; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Delete characters at current position. | |
1175 | */ | |
1176 | static void | |
1177 | tty3270_delete_characters(struct tty3270 *tp, int n) | |
1178 | { | |
1179 | struct tty3270_line *line; | |
1180 | int i; | |
1181 | ||
1182 | line = tp->screen + tp->cy; | |
1183 | if (line->len <= tp->cx) | |
1184 | return; | |
1185 | if (line->len - tp->cx <= n) { | |
1186 | line->len = tp->cx; | |
1187 | return; | |
1188 | } | |
1189 | for (i = tp->cx; i + n < line->len; i++) | |
1190 | line->cells[i] = line->cells[i + n]; | |
1191 | line->len -= n; | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * Erase characters at current position. | |
1196 | */ | |
1197 | static void | |
1198 | tty3270_erase_characters(struct tty3270 *tp, int n) | |
1199 | { | |
1200 | struct tty3270_line *line; | |
1201 | struct tty3270_cell *cell; | |
1202 | ||
1203 | line = tp->screen + tp->cy; | |
1204 | while (line->len > tp->cx && n-- > 0) { | |
1205 | cell = line->cells + tp->cx++; | |
1206 | cell->character = ' '; | |
1207 | cell->highlight = TAX_RESET; | |
1208 | cell->f_color = TAC_RESET; | |
1209 | } | |
1210 | tp->cx += n; | |
1211 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1212 | } | |
1213 | ||
1214 | /* | |
1215 | * Erase line, 3 different cases: | |
1216 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1217 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1218 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1219 | */ | |
1220 | static void | |
1221 | tty3270_erase_line(struct tty3270 *tp, int mode) | |
1222 | { | |
1223 | struct tty3270_line *line; | |
1224 | struct tty3270_cell *cell; | |
1225 | int i; | |
1226 | ||
1227 | line = tp->screen + tp->cy; | |
1228 | if (mode == 0) | |
1229 | line->len = tp->cx; | |
1230 | else if (mode == 1) { | |
1231 | for (i = 0; i < tp->cx; i++) { | |
1232 | cell = line->cells + i; | |
1233 | cell->character = ' '; | |
1234 | cell->highlight = TAX_RESET; | |
1235 | cell->f_color = TAC_RESET; | |
1236 | } | |
1237 | if (line->len <= tp->cx) | |
1238 | line->len = tp->cx + 1; | |
1239 | } else if (mode == 2) | |
1240 | line->len = 0; | |
1241 | tty3270_convert_line(tp, tp->cy); | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | * Erase display, 3 different cases: | |
1246 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1247 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1248 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1249 | */ | |
1250 | static void | |
1251 | tty3270_erase_display(struct tty3270 *tp, int mode) | |
1252 | { | |
1253 | int i; | |
1254 | ||
1255 | if (mode == 0) { | |
1256 | tty3270_erase_line(tp, 0); | |
1257 | for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { | |
1258 | tp->screen[i].len = 0; | |
1259 | tty3270_convert_line(tp, i); | |
1260 | } | |
1261 | } else if (mode == 1) { | |
1262 | for (i = 0; i < tp->cy; i++) { | |
1263 | tp->screen[i].len = 0; | |
1264 | tty3270_convert_line(tp, i); | |
1265 | } | |
1266 | tty3270_erase_line(tp, 1); | |
1267 | } else if (mode == 2) { | |
1268 | for (i = 0; i < tp->view.rows - 2; i++) { | |
1269 | tp->screen[i].len = 0; | |
1270 | tty3270_convert_line(tp, i); | |
1271 | } | |
1272 | } | |
1273 | tty3270_rebuild_update(tp); | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * Set attributes found in an escape sequence. | |
1278 | * Esc [ <attr> ; <attr> ; ... m | |
1279 | */ | |
1280 | static void | |
1281 | tty3270_set_attributes(struct tty3270 *tp) | |
1282 | { | |
1283 | static unsigned char f_colors[] = { | |
1284 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, | |
1285 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1286 | }; | |
1287 | int i, attr; | |
1288 | ||
1289 | for (i = 0; i <= tp->esc_npar; i++) { | |
1290 | attr = tp->esc_par[i]; | |
1291 | switch (attr) { | |
1292 | case 0: /* Reset */ | |
1293 | tp->highlight = TAX_RESET; | |
1294 | tp->f_color = TAC_RESET; | |
1295 | break; | |
1296 | /* Highlight. */ | |
1297 | case 4: /* Start underlining. */ | |
1298 | tp->highlight = TAX_UNDER; | |
1299 | break; | |
1300 | case 5: /* Start blink. */ | |
1301 | tp->highlight = TAX_BLINK; | |
1302 | break; | |
1303 | case 7: /* Start reverse. */ | |
1304 | tp->highlight = TAX_REVER; | |
1305 | break; | |
1306 | case 24: /* End underlining */ | |
1307 | if (tp->highlight == TAX_UNDER) | |
1308 | tp->highlight = TAX_RESET; | |
1309 | break; | |
1310 | case 25: /* End blink. */ | |
1311 | if (tp->highlight == TAX_BLINK) | |
1312 | tp->highlight = TAX_RESET; | |
1313 | break; | |
1314 | case 27: /* End reverse. */ | |
1315 | if (tp->highlight == TAX_REVER) | |
1316 | tp->highlight = TAX_RESET; | |
1317 | break; | |
1318 | /* Foreground color. */ | |
1319 | case 30: /* Black */ | |
1320 | case 31: /* Red */ | |
1321 | case 32: /* Green */ | |
1322 | case 33: /* Yellow */ | |
1323 | case 34: /* Blue */ | |
1324 | case 35: /* Magenta */ | |
1325 | case 36: /* Cyan */ | |
1326 | case 37: /* White */ | |
1327 | case 39: /* Black */ | |
1328 | tp->f_color = f_colors[attr - 30]; | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | static inline int | |
1335 | tty3270_getpar(struct tty3270 *tp, int ix) | |
1336 | { | |
1337 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1338 | } | |
1339 | ||
1340 | static void | |
1341 | tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) | |
1342 | { | |
1343 | tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx)); | |
1344 | cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy)); | |
1345 | if (cy != tp->cy) { | |
1346 | tty3270_convert_line(tp, tp->cy); | |
1347 | tp->cy = cy; | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Process escape sequences. Known sequences: | |
1353 | * Esc 7 Save Cursor Position | |
1354 | * Esc 8 Restore Cursor Position | |
1355 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1356 | * Esc [ Pn ; Pn H Cursor Position | |
1357 | * Esc [ Pn ; Pn f Cursor Position | |
1358 | * Esc [ Pn A Cursor Up | |
1359 | * Esc [ Pn B Cursor Down | |
1360 | * Esc [ Pn C Cursor Forward | |
1361 | * Esc [ Pn D Cursor Backward | |
1362 | * Esc [ Pn G Cursor Horizontal Absolute | |
1363 | * Esc [ Pn X Erase Characters | |
1364 | * Esc [ Ps J Erase in Display | |
1365 | * Esc [ Ps K Erase in Line | |
1366 | * // FIXME: add all the new ones. | |
1367 | * | |
1368 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1369 | * Ps is a selective parameter. | |
1370 | */ | |
1371 | static void | |
1372 | tty3270_escape_sequence(struct tty3270 *tp, char ch) | |
1373 | { | |
1374 | enum { ESnormal, ESesc, ESsquare, ESgetpars }; | |
1375 | ||
1376 | if (tp->esc_state == ESnormal) { | |
1377 | if (ch == 0x1b) | |
1378 | /* Starting new escape sequence. */ | |
1379 | tp->esc_state = ESesc; | |
1380 | return; | |
1381 | } | |
1382 | if (tp->esc_state == ESesc) { | |
1383 | tp->esc_state = ESnormal; | |
1384 | switch (ch) { | |
1385 | case '[': | |
1386 | tp->esc_state = ESsquare; | |
1387 | break; | |
1388 | case 'E': | |
1389 | tty3270_cr(tp); | |
1390 | tty3270_lf(tp); | |
1391 | break; | |
1392 | case 'M': | |
1393 | tty3270_ri(tp); | |
1394 | break; | |
1395 | case 'D': | |
1396 | tty3270_lf(tp); | |
1397 | break; | |
1398 | case 'Z': /* Respond ID. */ | |
1399 | kbd_puts_queue(tp->tty, "\033[?6c"); | |
1400 | break; | |
1401 | case '7': /* Save cursor position. */ | |
1402 | tp->saved_cx = tp->cx; | |
1403 | tp->saved_cy = tp->cy; | |
1404 | tp->saved_highlight = tp->highlight; | |
1405 | tp->saved_f_color = tp->f_color; | |
1406 | break; | |
1407 | case '8': /* Restore cursor position. */ | |
1408 | tty3270_convert_line(tp, tp->cy); | |
1409 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1410 | tp->highlight = tp->saved_highlight; | |
1411 | tp->f_color = tp->saved_f_color; | |
1412 | break; | |
1413 | case 'c': /* Reset terminal. */ | |
1414 | tp->cx = tp->saved_cx = 0; | |
1415 | tp->cy = tp->saved_cy = 0; | |
1416 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1417 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1418 | tty3270_erase_display(tp, 2); | |
1419 | break; | |
1420 | } | |
1421 | return; | |
1422 | } | |
1423 | if (tp->esc_state == ESsquare) { | |
1424 | tp->esc_state = ESgetpars; | |
1425 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1426 | tp->esc_npar = 0; | |
1427 | tp->esc_ques = (ch == '?'); | |
1428 | if (tp->esc_ques) | |
1429 | return; | |
1430 | } | |
1431 | if (tp->esc_state == ESgetpars) { | |
1432 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { | |
1433 | tp->esc_npar++; | |
1434 | return; | |
1435 | } | |
1436 | if (ch >= '0' && ch <= '9') { | |
1437 | tp->esc_par[tp->esc_npar] *= 10; | |
1438 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1439 | return; | |
1440 | } | |
1441 | } | |
1442 | tp->esc_state = ESnormal; | |
1443 | if (ch == 'n' && !tp->esc_ques) { | |
1444 | if (tp->esc_par[0] == 5) /* Status report. */ | |
1445 | kbd_puts_queue(tp->tty, "\033[0n"); | |
1446 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ | |
1447 | char buf[40]; | |
1448 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
1449 | kbd_puts_queue(tp->tty, buf); | |
1450 | } | |
1451 | return; | |
1452 | } | |
1453 | if (tp->esc_ques) | |
1454 | return; | |
1455 | switch (ch) { | |
1456 | case 'm': | |
1457 | tty3270_set_attributes(tp); | |
1458 | break; | |
1459 | case 'H': /* Set cursor position. */ | |
1460 | case 'f': | |
1461 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1462 | tty3270_getpar(tp, 0) - 1); | |
1463 | break; | |
1464 | case 'd': /* Set y position. */ | |
1465 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1466 | break; | |
1467 | case 'A': /* Cursor up. */ | |
1468 | case 'F': | |
1469 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1470 | break; | |
1471 | case 'B': /* Cursor down. */ | |
1472 | case 'e': | |
1473 | case 'E': | |
1474 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1475 | break; | |
1476 | case 'C': /* Cursor forward. */ | |
1477 | case 'a': | |
1478 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1479 | break; | |
1480 | case 'D': /* Cursor backward. */ | |
1481 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1482 | break; | |
1483 | case 'G': /* Set x position. */ | |
1484 | case '`': | |
1485 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1486 | break; | |
1487 | case 'X': /* Erase Characters. */ | |
1488 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1489 | break; | |
1490 | case 'J': /* Erase display. */ | |
1491 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1492 | break; | |
1493 | case 'K': /* Erase line. */ | |
1494 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1495 | break; | |
1496 | case 'P': /* Delete characters. */ | |
1497 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1498 | break; | |
1499 | case '@': /* Insert characters. */ | |
1500 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1501 | break; | |
1502 | case 's': /* Save cursor position. */ | |
1503 | tp->saved_cx = tp->cx; | |
1504 | tp->saved_cy = tp->cy; | |
1505 | tp->saved_highlight = tp->highlight; | |
1506 | tp->saved_f_color = tp->f_color; | |
1507 | break; | |
1508 | case 'u': /* Restore cursor position. */ | |
1509 | tty3270_convert_line(tp, tp->cy); | |
1510 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1511 | tp->highlight = tp->saved_highlight; | |
1512 | tp->f_color = tp->saved_f_color; | |
1513 | break; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * String write routine for 3270 ttys | |
1519 | */ | |
1520 | static void | |
1521 | tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count) | |
1522 | { | |
1523 | int i_msg, i; | |
1524 | ||
1525 | spin_lock_bh(&tp->view.lock); | |
1526 | for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) { | |
1527 | if (tp->esc_state != 0) { | |
1528 | /* Continue escape sequence. */ | |
1529 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1530 | continue; | |
1531 | } | |
1532 | ||
1533 | switch (buf[i_msg]) { | |
1534 | case 0x07: /* '\a' -- Alarm */ | |
1535 | tp->wcc |= TW_PLUSALARM; | |
1536 | break; | |
1537 | case 0x08: /* Backspace. */ | |
1538 | if (tp->cx > 0) { | |
1539 | tp->cx--; | |
1540 | tty3270_put_character(tp, ' '); | |
1541 | } | |
1542 | break; | |
1543 | case 0x09: /* '\t' -- Tabulate */ | |
1544 | for (i = tp->cx % 8; i < 8; i++) { | |
1545 | if (tp->cx >= tp->view.cols) { | |
1546 | tty3270_cr(tp); | |
1547 | tty3270_lf(tp); | |
1548 | break; | |
1549 | } | |
1550 | tty3270_put_character(tp, ' '); | |
1551 | tp->cx++; | |
1552 | } | |
1553 | break; | |
1554 | case 0x0a: /* '\n' -- New Line */ | |
1555 | tty3270_cr(tp); | |
1556 | tty3270_lf(tp); | |
1557 | break; | |
1558 | case 0x0c: /* '\f' -- Form Feed */ | |
1559 | tty3270_erase_display(tp, 2); | |
1560 | tp->cx = tp->cy = 0; | |
1561 | break; | |
1562 | case 0x0d: /* '\r' -- Carriage Return */ | |
1563 | tp->cx = 0; | |
1564 | break; | |
1565 | case 0x0f: /* SuSE "exit alternate mode" */ | |
1566 | break; | |
1567 | case 0x1b: /* Start escape sequence. */ | |
1568 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1569 | break; | |
1570 | default: /* Insert normal character. */ | |
1571 | if (tp->cx >= tp->view.cols) { | |
1572 | tty3270_cr(tp); | |
1573 | tty3270_lf(tp); | |
1574 | } | |
1575 | tty3270_put_character(tp, buf[i_msg]); | |
1576 | tp->cx++; | |
1577 | break; | |
1578 | } | |
1579 | } | |
1580 | /* Convert current line to 3270 data fragment. */ | |
1581 | tty3270_convert_line(tp, tp->cy); | |
1582 | ||
1583 | /* Setup timer to update display after 1/10 second */ | |
1584 | if (!timer_pending(&tp->timer)) | |
1585 | tty3270_set_timer(tp, HZ/10); | |
1586 | ||
1587 | spin_unlock_bh(&tp->view.lock); | |
1588 | } | |
1589 | ||
1590 | /* | |
1591 | * String write routine for 3270 ttys | |
1592 | */ | |
1593 | static int | |
1594 | tty3270_write(struct tty_struct * tty, | |
1595 | const unsigned char *buf, int count) | |
1596 | { | |
1597 | struct tty3270 *tp; | |
1598 | ||
1599 | tp = tty->driver_data; | |
1600 | if (!tp) | |
1601 | return 0; | |
1602 | if (tp->char_count > 0) { | |
1603 | tty3270_do_write(tp, tp->char_buf, tp->char_count); | |
1604 | tp->char_count = 0; | |
1605 | } | |
1606 | tty3270_do_write(tp, buf, count); | |
1607 | return count; | |
1608 | } | |
1609 | ||
1610 | /* | |
1611 | * Put single characters to the ttys character buffer | |
1612 | */ | |
1613 | static void | |
1614 | tty3270_put_char(struct tty_struct *tty, unsigned char ch) | |
1615 | { | |
1616 | struct tty3270 *tp; | |
1617 | ||
1618 | tp = tty->driver_data; | |
1619 | if (!tp) | |
1620 | return; | |
1621 | if (tp->char_count < TTY3270_CHAR_BUF_SIZE) | |
1622 | tp->char_buf[tp->char_count++] = ch; | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Flush all characters from the ttys characeter buffer put there | |
1627 | * by tty3270_put_char. | |
1628 | */ | |
1629 | static void | |
1630 | tty3270_flush_chars(struct tty_struct *tty) | |
1631 | { | |
1632 | struct tty3270 *tp; | |
1633 | ||
1634 | tp = tty->driver_data; | |
1635 | if (!tp) | |
1636 | return; | |
1637 | if (tp->char_count > 0) { | |
1638 | tty3270_do_write(tp, tp->char_buf, tp->char_count); | |
1639 | tp->char_count = 0; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | /* | |
1644 | * Returns the number of characters in the output buffer. This is | |
1645 | * used in tty_wait_until_sent to wait until all characters have | |
1646 | * appeared on the screen. | |
1647 | */ | |
1648 | static int | |
1649 | tty3270_chars_in_buffer(struct tty_struct *tty) | |
1650 | { | |
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | static void | |
1655 | tty3270_flush_buffer(struct tty_struct *tty) | |
1656 | { | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Check for visible/invisible input switches | |
1661 | */ | |
1662 | static void | |
1663 | tty3270_set_termios(struct tty_struct *tty, struct termios *old) | |
1664 | { | |
1665 | struct tty3270 *tp; | |
1666 | int new; | |
1667 | ||
1668 | tp = tty->driver_data; | |
1669 | if (!tp) | |
1670 | return; | |
1671 | spin_lock_bh(&tp->view.lock); | |
1672 | if (L_ICANON(tty)) { | |
1673 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1674 | if (new != tp->inattr) { | |
1675 | tp->inattr = new; | |
d2c993d8 | 1676 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
1677 | tty3270_set_timer(tp, 1); |
1678 | } | |
1679 | } | |
1680 | spin_unlock_bh(&tp->view.lock); | |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * Disable reading from a 3270 tty | |
1685 | */ | |
1686 | static void | |
1687 | tty3270_throttle(struct tty_struct * tty) | |
1688 | { | |
1689 | struct tty3270 *tp; | |
1690 | ||
1691 | tp = tty->driver_data; | |
1692 | if (!tp) | |
1693 | return; | |
1694 | tp->throttle = 1; | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Enable reading from a 3270 tty | |
1699 | */ | |
1700 | static void | |
1701 | tty3270_unthrottle(struct tty_struct * tty) | |
1702 | { | |
1703 | struct tty3270 *tp; | |
1704 | ||
1705 | tp = tty->driver_data; | |
1706 | if (!tp) | |
1707 | return; | |
1708 | tp->throttle = 0; | |
1709 | if (tp->attn) | |
1710 | tty3270_issue_read(tp, 1); | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Hang up the tty device. | |
1715 | */ | |
1716 | static void | |
1717 | tty3270_hangup(struct tty_struct *tty) | |
1718 | { | |
1719 | // FIXME: implement | |
1720 | } | |
1721 | ||
1722 | static void | |
1723 | tty3270_wait_until_sent(struct tty_struct *tty, int timeout) | |
1724 | { | |
1725 | } | |
1726 | ||
1727 | static int | |
1728 | tty3270_ioctl(struct tty_struct *tty, struct file *file, | |
1729 | unsigned int cmd, unsigned long arg) | |
1730 | { | |
1731 | struct tty3270 *tp; | |
1732 | ||
1733 | tp = tty->driver_data; | |
1734 | if (!tp) | |
1735 | return -ENODEV; | |
1736 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1737 | return -EIO; | |
1738 | return kbd_ioctl(tp->kbd, file, cmd, arg); | |
1739 | } | |
1740 | ||
1741 | static struct tty_operations tty3270_ops = { | |
1742 | .open = tty3270_open, | |
1743 | .close = tty3270_close, | |
1744 | .write = tty3270_write, | |
1745 | .put_char = tty3270_put_char, | |
1746 | .flush_chars = tty3270_flush_chars, | |
1747 | .write_room = tty3270_write_room, | |
1748 | .chars_in_buffer = tty3270_chars_in_buffer, | |
1749 | .flush_buffer = tty3270_flush_buffer, | |
1750 | .throttle = tty3270_throttle, | |
1751 | .unthrottle = tty3270_unthrottle, | |
1752 | .hangup = tty3270_hangup, | |
1753 | .wait_until_sent = tty3270_wait_until_sent, | |
1754 | .ioctl = tty3270_ioctl, | |
1755 | .set_termios = tty3270_set_termios | |
1756 | }; | |
1757 | ||
1758 | void | |
1759 | tty3270_notifier(int index, int active) | |
1760 | { | |
1761 | if (active) | |
d2c993d8 | 1762 | tty_register_device(tty3270_driver, index, NULL); |
1da177e4 LT |
1763 | else |
1764 | tty_unregister_device(tty3270_driver, index); | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * 3270 tty registration code called from tty_init(). | |
1769 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1770 | */ | |
1771 | int __init | |
1772 | tty3270_init(void) | |
1773 | { | |
1774 | struct tty_driver *driver; | |
1775 | int ret; | |
1776 | ||
ed3cb6f0 | 1777 | driver = alloc_tty_driver(RAW3270_MAXDEVS); |
1da177e4 LT |
1778 | if (!driver) |
1779 | return -ENOMEM; | |
1780 | ||
1781 | /* | |
1782 | * Initialize the tty_driver structure | |
1783 | * Entries in tty3270_driver that are NOT initialized: | |
1784 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1785 | */ | |
1786 | driver->owner = THIS_MODULE; | |
1da177e4 LT |
1787 | driver->driver_name = "ttyTUB"; |
1788 | driver->name = "ttyTUB"; | |
1789 | driver->major = IBM_TTY3270_MAJOR; | |
ed3cb6f0 | 1790 | driver->minor_start = RAW3270_FIRSTMINOR; |
1da177e4 LT |
1791 | driver->type = TTY_DRIVER_TYPE_SYSTEM; |
1792 | driver->subtype = SYSTEM_TYPE_TTY; | |
1793 | driver->init_termios = tty_std_termios; | |
331b8319 | 1794 | driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1795 | tty_set_operations(driver, &tty3270_ops); |
1796 | ret = tty_register_driver(driver); | |
1797 | if (ret) { | |
1798 | printk(KERN_ERR "tty3270 registration failed with %d\n", ret); | |
1799 | put_tty_driver(driver); | |
1800 | return ret; | |
1801 | } | |
1802 | tty3270_driver = driver; | |
1803 | ret = raw3270_register_notifier(tty3270_notifier); | |
1804 | if (ret) { | |
1805 | printk(KERN_ERR "tty3270 notifier registration failed " | |
1806 | "with %d\n", ret); | |
1807 | put_tty_driver(driver); | |
1808 | return ret; | |
1809 | ||
1810 | } | |
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | static void __exit | |
1815 | tty3270_exit(void) | |
1816 | { | |
1817 | struct tty_driver *driver; | |
1818 | ||
1819 | raw3270_unregister_notifier(tty3270_notifier); | |
1820 | driver = tty3270_driver; | |
d2c993d8 | 1821 | tty3270_driver = NULL; |
1da177e4 LT |
1822 | tty_unregister_driver(driver); |
1823 | tty3270_del_views(); | |
1824 | } | |
1825 | ||
1826 | MODULE_LICENSE("GPL"); | |
1827 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
1828 | ||
1829 | module_init(tty3270_init); | |
1830 | module_exit(tty3270_exit); |