Commit | Line | Data |
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6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
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> | |
a53c8fab | 8 | * -- Copyright IBM Corp. 2003 |
1da177e4 LT |
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> | |
4d334fd1 | 19 | #include <linux/workqueue.h> |
1da177e4 LT |
20 | |
21 | #include <linux/slab.h> | |
57c8a661 | 22 | #include <linux/memblock.h> |
9d4bfd41 | 23 | #include <linux/compat.h> |
1da177e4 LT |
24 | |
25 | #include <asm/ccwdev.h> | |
26 | #include <asm/cio.h> | |
27 | #include <asm/ebcdic.h> | |
7c0f6ba6 | 28 | #include <linux/uaccess.h> |
1da177e4 | 29 | |
1da177e4 | 30 | #include "raw3270.h" |
364c8558 | 31 | #include "tty3270.h" |
1da177e4 LT |
32 | #include "keyboard.h" |
33 | ||
34 | #define TTY3270_CHAR_BUF_SIZE 256 | |
35 | #define TTY3270_OUTPUT_BUFFER_SIZE 1024 | |
36 | #define TTY3270_STRING_PAGES 5 | |
37 | ||
38 | struct tty_driver *tty3270_driver; | |
39 | static int tty3270_max_index; | |
40 | ||
2b67fc46 | 41 | static struct raw3270_fn tty3270_fn; |
1da177e4 LT |
42 | |
43 | struct tty3270_cell { | |
44 | unsigned char character; | |
45 | unsigned char highlight; | |
46 | unsigned char f_color; | |
47 | }; | |
48 | ||
49 | struct tty3270_line { | |
50 | struct tty3270_cell *cells; | |
51 | int len; | |
52 | }; | |
53 | ||
54 | #define ESCAPE_NPAR 8 | |
55 | ||
56 | /* | |
57 | * The main tty view data structure. | |
58 | * FIXME: | |
59 | * 1) describe line orientation & lines list concept against screen | |
60 | * 2) describe conversion of screen to lines | |
61 | * 3) describe line format. | |
62 | */ | |
63 | struct tty3270 { | |
64 | struct raw3270_view view; | |
ba186e7d | 65 | struct tty_port port; |
1da177e4 LT |
66 | void **freemem_pages; /* Array of pages used for freemem. */ |
67 | struct list_head freemem; /* List of free memory for strings. */ | |
68 | ||
69 | /* Output stuff. */ | |
70 | struct list_head lines; /* List of lines. */ | |
71 | struct list_head update; /* List of lines to update. */ | |
72 | unsigned char wcc; /* Write control character. */ | |
73 | int nr_lines; /* # lines in list. */ | |
74 | int nr_up; /* # lines up in history. */ | |
75 | unsigned long update_flags; /* Update indication bits. */ | |
76 | struct string *status; /* Lower right of display. */ | |
77 | struct raw3270_request *write; /* Single write request. */ | |
78 | struct timer_list timer; /* Output delay timer. */ | |
79 | ||
80 | /* Current tty screen. */ | |
81 | unsigned int cx, cy; /* Current output position. */ | |
82 | unsigned int highlight; /* Blink/reverse/underscore */ | |
83 | unsigned int f_color; /* Foreground color */ | |
84 | struct tty3270_line *screen; | |
4d334fd1 MS |
85 | unsigned int n_model, n_cols, n_rows; /* New model & size */ |
86 | struct work_struct resize_work; | |
1da177e4 LT |
87 | |
88 | /* Input stuff. */ | |
89 | struct string *prompt; /* Output string for input area. */ | |
90 | struct string *input; /* Input string for read request. */ | |
91 | struct raw3270_request *read; /* Single read request. */ | |
92 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
93 | unsigned char inattr; /* Visible/invisible input. */ | |
94 | int throttle, attn; /* tty throttle/unthrottle. */ | |
95 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
0c756914 | 96 | struct tasklet_struct hanglet; /* Tasklet to hang up the tty. */ |
1da177e4 LT |
97 | struct kbd_data *kbd; /* key_maps stuff. */ |
98 | ||
99 | /* Escape sequence parsing. */ | |
100 | int esc_state, esc_ques, esc_npar; | |
101 | int esc_par[ESCAPE_NPAR]; | |
102 | unsigned int saved_cx, saved_cy; | |
103 | unsigned int saved_highlight, saved_f_color; | |
104 | ||
105 | /* Command recalling. */ | |
106 | struct list_head rcl_lines; /* List of recallable lines. */ | |
107 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
108 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
109 | ||
110 | /* Character array for put_char/flush_chars. */ | |
111 | unsigned int char_count; | |
112 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
113 | }; | |
114 | ||
115 | /* tty3270->update_flags. See tty3270_update for details. */ | |
116 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
117 | #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
118 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ | |
119 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
205d7ab9 | 120 | #define TTY_UPDATE_ALL 16 /* Recreate screen. */ |
1da177e4 | 121 | |
c9602ee7 | 122 | static void tty3270_update(struct timer_list *); |
4d334fd1 | 123 | static void tty3270_resize_work(struct work_struct *work); |
1da177e4 LT |
124 | |
125 | /* | |
126 | * Setup timeout for a device. On timeout trigger an update. | |
127 | */ | |
2b67fc46 | 128 | static void tty3270_set_timer(struct tty3270 *tp, int expires) |
1da177e4 | 129 | { |
03439e7d | 130 | mod_timer(&tp->timer, jiffies + expires); |
1da177e4 LT |
131 | } |
132 | ||
133 | /* | |
134 | * The input line are the two last lines of the screen. | |
135 | */ | |
136 | static void | |
137 | tty3270_update_prompt(struct tty3270 *tp, char *input, int count) | |
138 | { | |
139 | struct string *line; | |
140 | unsigned int off; | |
141 | ||
142 | line = tp->prompt; | |
143 | if (count != 0) | |
144 | line->string[5] = TF_INMDT; | |
145 | else | |
146 | line->string[5] = tp->inattr; | |
147 | if (count > tp->view.cols * 2 - 11) | |
148 | count = tp->view.cols * 2 - 11; | |
149 | memcpy(line->string + 6, input, count); | |
150 | line->string[6 + count] = TO_IC; | |
151 | /* Clear to end of input line. */ | |
152 | if (count < tp->view.cols * 2 - 11) { | |
153 | line->string[7 + count] = TO_RA; | |
154 | line->string[10 + count] = 0; | |
155 | off = tp->view.cols * tp->view.rows - 9; | |
156 | raw3270_buffer_address(tp->view.dev, line->string+count+8, off); | |
157 | line->len = 11 + count; | |
158 | } else | |
159 | line->len = 7 + count; | |
160 | tp->update_flags |= TTY_UPDATE_INPUT; | |
161 | } | |
162 | ||
163 | static void | |
164 | tty3270_create_prompt(struct tty3270 *tp) | |
165 | { | |
166 | static const unsigned char blueprint[] = | |
167 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
168 | /* empty input string */ | |
169 | TO_IC, TO_RA, 0, 0, 0 }; | |
170 | struct string *line; | |
171 | unsigned int offset; | |
172 | ||
173 | line = alloc_string(&tp->freemem, | |
174 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
175 | tp->prompt = line; | |
176 | tp->inattr = TF_INPUT; | |
177 | /* Copy blueprint to status line */ | |
178 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
179 | line->len = sizeof(blueprint); | |
180 | /* Set output offsets. */ | |
181 | offset = tp->view.cols * (tp->view.rows - 2); | |
182 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
183 | offset = tp->view.cols * tp->view.rows - 9; | |
184 | raw3270_buffer_address(tp->view.dev, line->string + 8, offset); | |
185 | ||
186 | /* Allocate input string for reading. */ | |
187 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
188 | } | |
189 | ||
190 | /* | |
191 | * The status line is the last line of the screen. It shows the string | |
192 | * "Running"/"Holding" in the lower right corner of the screen. | |
193 | */ | |
194 | static void | |
195 | tty3270_update_status(struct tty3270 * tp) | |
196 | { | |
197 | char *str; | |
198 | ||
199 | str = (tp->nr_up != 0) ? "History" : "Running"; | |
200 | memcpy(tp->status->string + 8, str, 7); | |
201 | codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); | |
202 | tp->update_flags |= TTY_UPDATE_STATUS; | |
203 | } | |
204 | ||
205 | static void | |
206 | tty3270_create_status(struct tty3270 * tp) | |
207 | { | |
208 | static const unsigned char blueprint[] = | |
209 | { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, | |
210 | 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, | |
211 | TAC_RESET }; | |
212 | struct string *line; | |
213 | unsigned int offset; | |
214 | ||
215 | line = alloc_string(&tp->freemem,sizeof(blueprint)); | |
216 | tp->status = line; | |
217 | /* Copy blueprint to status line */ | |
218 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
219 | /* Set address to start of status string (= last 9 characters). */ | |
220 | offset = tp->view.cols * tp->view.rows - 9; | |
221 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
222 | } | |
223 | ||
224 | /* | |
225 | * Set output offsets to 3270 datastream fragment of a tty string. | |
226 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
227 | */ | |
228 | static void | |
229 | tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) | |
230 | { | |
231 | unsigned char *cp; | |
232 | ||
233 | raw3270_buffer_address(tp->view.dev, line->string + 1, | |
234 | tp->view.cols * nr); | |
235 | cp = line->string + line->len - 4; | |
236 | if (*cp == TO_RA) | |
237 | raw3270_buffer_address(tp->view.dev, cp + 1, | |
238 | tp->view.cols * (nr + 1)); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Rebuild update list to print all lines. | |
243 | */ | |
244 | static void | |
245 | tty3270_rebuild_update(struct tty3270 *tp) | |
246 | { | |
247 | struct string *s, *n; | |
248 | int line, nr_up; | |
249 | ||
250 | /* | |
251 | * Throw away update list and create a new one, | |
252 | * containing all lines that will fit on the screen. | |
253 | */ | |
254 | list_for_each_entry_safe(s, n, &tp->update, update) | |
255 | list_del_init(&s->update); | |
256 | line = tp->view.rows - 3; | |
257 | nr_up = tp->nr_up; | |
258 | list_for_each_entry_reverse(s, &tp->lines, list) { | |
259 | if (nr_up > 0) { | |
260 | nr_up--; | |
261 | continue; | |
262 | } | |
263 | tty3270_update_string(tp, s, line); | |
264 | list_add(&s->update, &tp->update); | |
265 | if (--line < 0) | |
266 | break; | |
267 | } | |
268 | tp->update_flags |= TTY_UPDATE_LIST; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Alloc string for size bytes. If there is not enough room in | |
273 | * freemem, free strings until there is room. | |
274 | */ | |
275 | static struct string * | |
276 | tty3270_alloc_string(struct tty3270 *tp, size_t size) | |
277 | { | |
278 | struct string *s, *n; | |
279 | ||
280 | s = alloc_string(&tp->freemem, size); | |
281 | if (s) | |
282 | return s; | |
283 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
284 | BUG_ON(tp->nr_lines <= tp->view.rows - 2); | |
285 | list_del(&s->list); | |
286 | if (!list_empty(&s->update)) | |
287 | list_del(&s->update); | |
288 | tp->nr_lines--; | |
289 | if (free_string(&tp->freemem, s) >= size) | |
290 | break; | |
291 | } | |
292 | s = alloc_string(&tp->freemem, size); | |
293 | BUG_ON(!s); | |
294 | if (tp->nr_up != 0 && | |
295 | tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { | |
296 | tp->nr_up = tp->nr_lines - tp->view.rows + 2; | |
297 | tty3270_rebuild_update(tp); | |
298 | tty3270_update_status(tp); | |
299 | } | |
300 | return s; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Add an empty line to the list. | |
305 | */ | |
306 | static void | |
307 | tty3270_blank_line(struct tty3270 *tp) | |
308 | { | |
309 | static const unsigned char blueprint[] = | |
310 | { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, | |
311 | TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; | |
312 | struct string *s; | |
313 | ||
314 | s = tty3270_alloc_string(tp, sizeof(blueprint)); | |
315 | memcpy(s->string, blueprint, sizeof(blueprint)); | |
316 | s->len = sizeof(blueprint); | |
317 | list_add_tail(&s->list, &tp->lines); | |
318 | tp->nr_lines++; | |
319 | if (tp->nr_up != 0) | |
320 | tp->nr_up++; | |
321 | } | |
322 | ||
7e36eff1 MS |
323 | /* |
324 | * Create a blank screen and remove all lines from the history. | |
325 | */ | |
326 | static void | |
327 | tty3270_blank_screen(struct tty3270 *tp) | |
328 | { | |
329 | struct string *s, *n; | |
330 | int i; | |
331 | ||
332 | for (i = 0; i < tp->view.rows - 2; i++) | |
333 | tp->screen[i].len = 0; | |
334 | tp->nr_up = 0; | |
335 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
336 | list_del(&s->list); | |
337 | if (!list_empty(&s->update)) | |
338 | list_del(&s->update); | |
339 | tp->nr_lines--; | |
340 | free_string(&tp->freemem, s); | |
341 | } | |
342 | } | |
343 | ||
1da177e4 LT |
344 | /* |
345 | * Write request completion callback. | |
346 | */ | |
347 | static void | |
348 | tty3270_write_callback(struct raw3270_request *rq, void *data) | |
349 | { | |
881e18f9 | 350 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 | 351 | |
1da177e4 | 352 | if (rq->rc != 0) { |
25985edc | 353 | /* Write wasn't successful. Refresh all. */ |
1da177e4 LT |
354 | tp->update_flags = TTY_UPDATE_ALL; |
355 | tty3270_set_timer(tp, 1); | |
356 | } | |
357 | raw3270_request_reset(rq); | |
358 | xchg(&tp->write, rq); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Update 3270 display. | |
363 | */ | |
364 | static void | |
c9602ee7 | 365 | tty3270_update(struct timer_list *t) |
1da177e4 | 366 | { |
c9602ee7 | 367 | struct tty3270 *tp = from_timer(tp, t, timer); |
1da177e4 LT |
368 | static char invalid_sba[2] = { 0xff, 0xff }; |
369 | struct raw3270_request *wrq; | |
370 | unsigned long updated; | |
371 | struct string *s, *n; | |
372 | char *sba, *str; | |
373 | int rc, len; | |
374 | ||
375 | wrq = xchg(&tp->write, 0); | |
376 | if (!wrq) { | |
377 | tty3270_set_timer(tp, 1); | |
378 | return; | |
379 | } | |
380 | ||
381 | spin_lock(&tp->view.lock); | |
382 | updated = 0; | |
205d7ab9 MS |
383 | if (tp->update_flags & TTY_UPDATE_ALL) { |
384 | tty3270_rebuild_update(tp); | |
385 | tty3270_update_status(tp); | |
386 | tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST | | |
387 | TTY_UPDATE_INPUT | TTY_UPDATE_STATUS; | |
388 | } | |
1da177e4 LT |
389 | if (tp->update_flags & TTY_UPDATE_ERASE) { |
390 | /* Use erase write alternate to erase display. */ | |
391 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
392 | updated |= TTY_UPDATE_ERASE; | |
393 | } else | |
394 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
395 | ||
396 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
397 | tp->wcc = TW_NONE; | |
398 | ||
399 | /* | |
400 | * Update status line. | |
401 | */ | |
402 | if (tp->update_flags & TTY_UPDATE_STATUS) | |
403 | if (raw3270_request_add_data(wrq, tp->status->string, | |
404 | tp->status->len) == 0) | |
405 | updated |= TTY_UPDATE_STATUS; | |
406 | ||
407 | /* | |
408 | * Write input line. | |
409 | */ | |
410 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
411 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
412 | tp->prompt->len) == 0) | |
413 | updated |= TTY_UPDATE_INPUT; | |
414 | ||
415 | sba = invalid_sba; | |
416 | ||
417 | if (tp->update_flags & TTY_UPDATE_LIST) { | |
418 | /* Write strings in the update list to the screen. */ | |
419 | list_for_each_entry_safe(s, n, &tp->update, update) { | |
420 | str = s->string; | |
421 | len = s->len; | |
422 | /* | |
423 | * Skip TO_SBA at the start of the string if the | |
424 | * last output position matches the start address | |
425 | * of this line. | |
426 | */ | |
427 | if (s->string[1] == sba[0] && s->string[2] == sba[1]) | |
428 | str += 3, len -= 3; | |
429 | if (raw3270_request_add_data(wrq, str, len) != 0) | |
430 | break; | |
431 | list_del_init(&s->update); | |
2e63a3a6 MS |
432 | if (s->string[s->len - 4] == TO_RA) |
433 | sba = s->string + s->len - 3; | |
434 | else | |
435 | sba = invalid_sba; | |
1da177e4 LT |
436 | } |
437 | if (list_empty(&tp->update)) | |
438 | updated |= TTY_UPDATE_LIST; | |
439 | } | |
440 | wrq->callback = tty3270_write_callback; | |
441 | rc = raw3270_start(&tp->view, wrq); | |
442 | if (rc == 0) { | |
443 | tp->update_flags &= ~updated; | |
444 | if (tp->update_flags) | |
445 | tty3270_set_timer(tp, 1); | |
446 | } else { | |
447 | raw3270_request_reset(wrq); | |
448 | xchg(&tp->write, wrq); | |
449 | } | |
450 | spin_unlock(&tp->view.lock); | |
1da177e4 LT |
451 | } |
452 | ||
453 | /* | |
454 | * Command recalling. | |
455 | */ | |
456 | static void | |
457 | tty3270_rcl_add(struct tty3270 *tp, char *input, int len) | |
458 | { | |
459 | struct string *s; | |
460 | ||
d2c993d8 | 461 | tp->rcl_walk = NULL; |
1da177e4 LT |
462 | if (len <= 0) |
463 | return; | |
464 | if (tp->rcl_nr >= tp->rcl_max) { | |
465 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
466 | list_del(&s->list); | |
467 | free_string(&tp->freemem, s); | |
468 | tp->rcl_nr--; | |
469 | } | |
470 | s = tty3270_alloc_string(tp, len); | |
471 | memcpy(s->string, input, len); | |
472 | list_add_tail(&s->list, &tp->rcl_lines); | |
473 | tp->rcl_nr++; | |
474 | } | |
475 | ||
476 | static void | |
477 | tty3270_rcl_backward(struct kbd_data *kbd) | |
478 | { | |
ba186e7d | 479 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
480 | struct string *s; |
481 | ||
1da177e4 LT |
482 | spin_lock_bh(&tp->view.lock); |
483 | if (tp->inattr == TF_INPUT) { | |
484 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
485 | tp->rcl_walk = tp->rcl_walk->prev; | |
486 | else if (!list_empty(&tp->rcl_lines)) | |
487 | tp->rcl_walk = tp->rcl_lines.prev; | |
488 | s = tp->rcl_walk ? | |
d2c993d8 | 489 | list_entry(tp->rcl_walk, struct string, list) : NULL; |
1da177e4 LT |
490 | if (tp->rcl_walk) { |
491 | s = list_entry(tp->rcl_walk, struct string, list); | |
492 | tty3270_update_prompt(tp, s->string, s->len); | |
493 | } else | |
d2c993d8 | 494 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
495 | tty3270_set_timer(tp, 1); |
496 | } | |
497 | spin_unlock_bh(&tp->view.lock); | |
498 | } | |
499 | ||
500 | /* | |
501 | * Deactivate tty view. | |
502 | */ | |
503 | static void | |
504 | tty3270_exit_tty(struct kbd_data *kbd) | |
505 | { | |
ba186e7d | 506 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 507 | |
1da177e4 LT |
508 | raw3270_deactivate_view(&tp->view); |
509 | } | |
510 | ||
511 | /* | |
512 | * Scroll forward in history. | |
513 | */ | |
514 | static void | |
515 | tty3270_scroll_forward(struct kbd_data *kbd) | |
516 | { | |
ba186e7d | 517 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
518 | int nr_up; |
519 | ||
1da177e4 LT |
520 | spin_lock_bh(&tp->view.lock); |
521 | nr_up = tp->nr_up - tp->view.rows + 2; | |
522 | if (nr_up < 0) | |
523 | nr_up = 0; | |
524 | if (nr_up != tp->nr_up) { | |
525 | tp->nr_up = nr_up; | |
526 | tty3270_rebuild_update(tp); | |
527 | tty3270_update_status(tp); | |
528 | tty3270_set_timer(tp, 1); | |
529 | } | |
530 | spin_unlock_bh(&tp->view.lock); | |
531 | } | |
532 | ||
533 | /* | |
534 | * Scroll backward in history. | |
535 | */ | |
536 | static void | |
537 | tty3270_scroll_backward(struct kbd_data *kbd) | |
538 | { | |
ba186e7d | 539 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
540 | int nr_up; |
541 | ||
1da177e4 LT |
542 | spin_lock_bh(&tp->view.lock); |
543 | nr_up = tp->nr_up + tp->view.rows - 2; | |
544 | if (nr_up + tp->view.rows - 2 > tp->nr_lines) | |
545 | nr_up = tp->nr_lines - tp->view.rows + 2; | |
546 | if (nr_up != tp->nr_up) { | |
547 | tp->nr_up = nr_up; | |
548 | tty3270_rebuild_update(tp); | |
549 | tty3270_update_status(tp); | |
550 | tty3270_set_timer(tp, 1); | |
551 | } | |
552 | spin_unlock_bh(&tp->view.lock); | |
553 | } | |
554 | ||
555 | /* | |
556 | * Pass input line to tty. | |
557 | */ | |
558 | static void | |
559 | tty3270_read_tasklet(struct raw3270_request *rrq) | |
560 | { | |
561 | static char kreset_data = TW_KR; | |
881e18f9 | 562 | struct tty3270 *tp = container_of(rrq->view, struct tty3270, view); |
1da177e4 LT |
563 | char *input; |
564 | int len; | |
565 | ||
1da177e4 LT |
566 | spin_lock_bh(&tp->view.lock); |
567 | /* | |
568 | * Two AID keys are special: For 0x7d (enter) the input line | |
569 | * has to be emitted to the tty and for 0x6d the screen | |
570 | * needs to be redrawn. | |
571 | */ | |
d2c993d8 | 572 | input = NULL; |
1da177e4 LT |
573 | len = 0; |
574 | if (tp->input->string[0] == 0x7d) { | |
575 | /* Enter: write input to tty. */ | |
576 | input = tp->input->string + 6; | |
577 | len = tp->input->len - 6 - rrq->rescnt; | |
578 | if (tp->inattr != TF_INPUTN) | |
579 | tty3270_rcl_add(tp, input, len); | |
580 | if (tp->nr_up > 0) { | |
581 | tp->nr_up = 0; | |
582 | tty3270_rebuild_update(tp); | |
583 | tty3270_update_status(tp); | |
584 | } | |
585 | /* Clear input area. */ | |
d2c993d8 | 586 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
587 | tty3270_set_timer(tp, 1); |
588 | } else if (tp->input->string[0] == 0x6d) { | |
589 | /* Display has been cleared. Redraw. */ | |
1da177e4 LT |
590 | tp->update_flags = TTY_UPDATE_ALL; |
591 | tty3270_set_timer(tp, 1); | |
592 | } | |
593 | spin_unlock_bh(&tp->view.lock); | |
594 | ||
595 | /* Start keyboard reset command. */ | |
596 | raw3270_request_reset(tp->kreset); | |
597 | raw3270_request_set_cmd(tp->kreset, TC_WRITE); | |
598 | raw3270_request_add_data(tp->kreset, &kreset_data, 1); | |
599 | raw3270_start(&tp->view, tp->kreset); | |
600 | ||
ba186e7d JS |
601 | while (len-- > 0) |
602 | kbd_keycode(tp->kbd, *input++); | |
603 | /* Emit keycode for AID byte. */ | |
604 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
1da177e4 LT |
605 | |
606 | raw3270_request_reset(rrq); | |
607 | xchg(&tp->read, rrq); | |
608 | raw3270_put_view(&tp->view); | |
609 | } | |
610 | ||
611 | /* | |
612 | * Read request completion callback. | |
613 | */ | |
614 | static void | |
615 | tty3270_read_callback(struct raw3270_request *rq, void *data) | |
616 | { | |
881e18f9 | 617 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 LT |
618 | raw3270_get_view(rq->view); |
619 | /* Schedule tasklet to pass input to tty. */ | |
881e18f9 | 620 | tasklet_schedule(&tp->readlet); |
1da177e4 LT |
621 | } |
622 | ||
623 | /* | |
624 | * Issue a read request. Call with device lock. | |
625 | */ | |
626 | static void | |
627 | tty3270_issue_read(struct tty3270 *tp, int lock) | |
628 | { | |
629 | struct raw3270_request *rrq; | |
630 | int rc; | |
631 | ||
632 | rrq = xchg(&tp->read, 0); | |
633 | if (!rrq) | |
634 | /* Read already scheduled. */ | |
635 | return; | |
636 | rrq->callback = tty3270_read_callback; | |
637 | rrq->callback_data = tp; | |
638 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
639 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
640 | /* Issue the read modified request. */ | |
641 | if (lock) { | |
642 | rc = raw3270_start(&tp->view, rrq); | |
643 | } else | |
644 | rc = raw3270_start_irq(&tp->view, rrq); | |
645 | if (rc) { | |
646 | raw3270_request_reset(rrq); | |
647 | xchg(&tp->read, rrq); | |
648 | } | |
649 | } | |
650 | ||
0c756914 MS |
651 | /* |
652 | * Hang up the tty | |
653 | */ | |
654 | static void | |
655 | tty3270_hangup_tasklet(struct tty3270 *tp) | |
656 | { | |
657 | tty_port_tty_hangup(&tp->port, true); | |
658 | raw3270_put_view(&tp->view); | |
659 | } | |
660 | ||
1da177e4 LT |
661 | /* |
662 | * Switch to the tty view. | |
663 | */ | |
664 | static int | |
665 | tty3270_activate(struct raw3270_view *view) | |
666 | { | |
881e18f9 | 667 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
1da177e4 | 668 | |
1da177e4 LT |
669 | tp->update_flags = TTY_UPDATE_ALL; |
670 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
671 | return 0; |
672 | } | |
673 | ||
674 | static void | |
675 | tty3270_deactivate(struct raw3270_view *view) | |
676 | { | |
881e18f9 | 677 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
205d7ab9 | 678 | |
205d7ab9 | 679 | del_timer(&tp->timer); |
1da177e4 LT |
680 | } |
681 | ||
8340ab60 | 682 | static void |
1da177e4 LT |
683 | tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) |
684 | { | |
685 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
23d805b6 | 686 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
687 | if (!tp->throttle) |
688 | tty3270_issue_read(tp, 0); | |
689 | else | |
690 | tp->attn = 1; | |
691 | } | |
692 | ||
693 | if (rq) { | |
0c756914 | 694 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 | 695 | rq->rc = -EIO; |
0c756914 MS |
696 | raw3270_get_view(&tp->view); |
697 | tasklet_schedule(&tp->hanglet); | |
698 | } else { | |
1da177e4 | 699 | /* Normal end. Copy residual count. */ |
23d805b6 | 700 | rq->rescnt = irb->scsw.cmd.count; |
0c756914 | 701 | } |
05bfd70b MS |
702 | } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
703 | /* Interrupt without an outstanding request -> update all */ | |
704 | tp->update_flags = TTY_UPDATE_ALL; | |
705 | tty3270_set_timer(tp, 1); | |
1da177e4 | 706 | } |
1da177e4 LT |
707 | } |
708 | ||
709 | /* | |
710 | * Allocate tty3270 structure. | |
711 | */ | |
712 | static struct tty3270 * | |
713 | tty3270_alloc_view(void) | |
714 | { | |
715 | struct tty3270 *tp; | |
716 | int pages; | |
717 | ||
88abaab4 | 718 | tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
1da177e4 LT |
719 | if (!tp) |
720 | goto out_err; | |
1da177e4 | 721 | tp->freemem_pages = |
6da2ec56 KC |
722 | kmalloc_array(TTY3270_STRING_PAGES, sizeof(void *), |
723 | GFP_KERNEL); | |
1da177e4 LT |
724 | if (!tp->freemem_pages) |
725 | goto out_tp; | |
726 | INIT_LIST_HEAD(&tp->freemem); | |
9d2ae233 JS |
727 | INIT_LIST_HEAD(&tp->lines); |
728 | INIT_LIST_HEAD(&tp->update); | |
729 | INIT_LIST_HEAD(&tp->rcl_lines); | |
730 | tp->rcl_max = 20; | |
9d2ae233 | 731 | |
1da177e4 LT |
732 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { |
733 | tp->freemem_pages[pages] = (void *) | |
734 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
735 | if (!tp->freemem_pages[pages]) | |
736 | goto out_pages; | |
737 | add_string_memory(&tp->freemem, | |
738 | tp->freemem_pages[pages], PAGE_SIZE); | |
739 | } | |
740 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
ed3cb6f0 | 741 | if (IS_ERR(tp->write)) |
1da177e4 LT |
742 | goto out_pages; |
743 | tp->read = raw3270_request_alloc(0); | |
ed3cb6f0 | 744 | if (IS_ERR(tp->read)) |
1da177e4 LT |
745 | goto out_write; |
746 | tp->kreset = raw3270_request_alloc(1); | |
ed3cb6f0 | 747 | if (IS_ERR(tp->kreset)) |
1da177e4 LT |
748 | goto out_read; |
749 | tp->kbd = kbd_alloc(); | |
750 | if (!tp->kbd) | |
751 | goto out_reset; | |
57985d7e MS |
752 | |
753 | tty_port_init(&tp->port); | |
c9602ee7 | 754 | timer_setup(&tp->timer, tty3270_update, 0); |
57985d7e MS |
755 | tasklet_init(&tp->readlet, |
756 | (void (*)(unsigned long)) tty3270_read_tasklet, | |
757 | (unsigned long) tp->read); | |
0c756914 MS |
758 | tasklet_init(&tp->hanglet, |
759 | (void (*)(unsigned long)) tty3270_hangup_tasklet, | |
760 | (unsigned long) tp); | |
4d334fd1 | 761 | INIT_WORK(&tp->resize_work, tty3270_resize_work); |
57985d7e | 762 | |
1da177e4 LT |
763 | return tp; |
764 | ||
765 | out_reset: | |
766 | raw3270_request_free(tp->kreset); | |
767 | out_read: | |
768 | raw3270_request_free(tp->read); | |
769 | out_write: | |
770 | raw3270_request_free(tp->write); | |
771 | out_pages: | |
772 | while (pages--) | |
773 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
774 | kfree(tp->freemem_pages); | |
191c5f10 | 775 | tty_port_destroy(&tp->port); |
1da177e4 LT |
776 | out_tp: |
777 | kfree(tp); | |
778 | out_err: | |
779 | return ERR_PTR(-ENOMEM); | |
780 | } | |
781 | ||
782 | /* | |
783 | * Free tty3270 structure. | |
784 | */ | |
785 | static void | |
786 | tty3270_free_view(struct tty3270 *tp) | |
787 | { | |
788 | int pages; | |
789 | ||
790 | kbd_free(tp->kbd); | |
791 | raw3270_request_free(tp->kreset); | |
792 | raw3270_request_free(tp->read); | |
793 | raw3270_request_free(tp->write); | |
794 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) | |
795 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
796 | kfree(tp->freemem_pages); | |
191c5f10 | 797 | tty_port_destroy(&tp->port); |
1da177e4 LT |
798 | kfree(tp); |
799 | } | |
800 | ||
801 | /* | |
802 | * Allocate tty3270 screen. | |
803 | */ | |
4d334fd1 MS |
804 | static struct tty3270_line * |
805 | tty3270_alloc_screen(unsigned int rows, unsigned int cols) | |
1da177e4 | 806 | { |
4d334fd1 | 807 | struct tty3270_line *screen; |
1da177e4 LT |
808 | unsigned long size; |
809 | int lines; | |
810 | ||
4d334fd1 MS |
811 | size = sizeof(struct tty3270_line) * (rows - 2); |
812 | screen = kzalloc(size, GFP_KERNEL); | |
813 | if (!screen) | |
1da177e4 | 814 | goto out_err; |
4d334fd1 MS |
815 | for (lines = 0; lines < rows - 2; lines++) { |
816 | size = sizeof(struct tty3270_cell) * cols; | |
817 | screen[lines].cells = kzalloc(size, GFP_KERNEL); | |
818 | if (!screen[lines].cells) | |
1da177e4 | 819 | goto out_screen; |
1da177e4 | 820 | } |
4d334fd1 | 821 | return screen; |
1da177e4 LT |
822 | out_screen: |
823 | while (lines--) | |
4d334fd1 MS |
824 | kfree(screen[lines].cells); |
825 | kfree(screen); | |
1da177e4 | 826 | out_err: |
4d334fd1 | 827 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
828 | } |
829 | ||
830 | /* | |
831 | * Free tty3270 screen. | |
832 | */ | |
833 | static void | |
4d334fd1 | 834 | tty3270_free_screen(struct tty3270_line *screen, unsigned int rows) |
1da177e4 LT |
835 | { |
836 | int lines; | |
837 | ||
4d334fd1 MS |
838 | for (lines = 0; lines < rows - 2; lines++) |
839 | kfree(screen[lines].cells); | |
840 | kfree(screen); | |
841 | } | |
842 | ||
843 | /* | |
844 | * Resize tty3270 screen | |
845 | */ | |
846 | static void tty3270_resize_work(struct work_struct *work) | |
847 | { | |
848 | struct tty3270 *tp = container_of(work, struct tty3270, resize_work); | |
849 | struct tty3270_line *screen, *oscreen; | |
850 | struct tty_struct *tty; | |
851 | unsigned int orows; | |
852 | struct winsize ws; | |
853 | ||
854 | screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols); | |
8f0ba630 | 855 | if (IS_ERR(screen)) |
4d334fd1 MS |
856 | return; |
857 | /* Switch to new output size */ | |
858 | spin_lock_bh(&tp->view.lock); | |
7e36eff1 | 859 | tty3270_blank_screen(tp); |
4d334fd1 MS |
860 | oscreen = tp->screen; |
861 | orows = tp->view.rows; | |
862 | tp->view.model = tp->n_model; | |
863 | tp->view.rows = tp->n_rows; | |
864 | tp->view.cols = tp->n_cols; | |
865 | tp->screen = screen; | |
866 | free_string(&tp->freemem, tp->prompt); | |
867 | free_string(&tp->freemem, tp->status); | |
868 | tty3270_create_prompt(tp); | |
869 | tty3270_create_status(tp); | |
4d334fd1 MS |
870 | while (tp->nr_lines < tp->view.rows - 2) |
871 | tty3270_blank_line(tp); | |
872 | tp->update_flags = TTY_UPDATE_ALL; | |
873 | spin_unlock_bh(&tp->view.lock); | |
874 | tty3270_free_screen(oscreen, orows); | |
875 | tty3270_set_timer(tp, 1); | |
876 | /* Informat tty layer about new size */ | |
877 | tty = tty_port_tty_get(&tp->port); | |
878 | if (!tty) | |
879 | return; | |
880 | ws.ws_row = tp->view.rows - 2; | |
881 | ws.ws_col = tp->view.cols; | |
882 | tty_do_resize(tty, &ws); | |
5ff04fe5 | 883 | tty_kref_put(tty); |
4d334fd1 MS |
884 | } |
885 | ||
886 | static void | |
887 | tty3270_resize(struct raw3270_view *view, int model, int rows, int cols) | |
888 | { | |
889 | struct tty3270 *tp = container_of(view, struct tty3270, view); | |
890 | ||
7e36eff1 MS |
891 | if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols) |
892 | return; | |
4d334fd1 MS |
893 | tp->n_model = model; |
894 | tp->n_rows = rows; | |
895 | tp->n_cols = cols; | |
896 | schedule_work(&tp->resize_work); | |
1da177e4 LT |
897 | } |
898 | ||
899 | /* | |
900 | * Unlink tty3270 data structure from tty. | |
901 | */ | |
902 | static void | |
903 | tty3270_release(struct raw3270_view *view) | |
904 | { | |
881e18f9 | 905 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
ba186e7d | 906 | struct tty_struct *tty = tty_port_tty_get(&tp->port); |
1da177e4 | 907 | |
1da177e4 | 908 | if (tty) { |
d2c993d8 | 909 | tty->driver_data = NULL; |
ba186e7d | 910 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
911 | tty_hangup(tty); |
912 | raw3270_put_view(&tp->view); | |
ba186e7d | 913 | tty_kref_put(tty); |
1da177e4 LT |
914 | } |
915 | } | |
916 | ||
917 | /* | |
918 | * Free tty3270 data structure | |
919 | */ | |
920 | static void | |
921 | tty3270_free(struct raw3270_view *view) | |
922 | { | |
881e18f9 | 923 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
4d334fd1 | 924 | |
03439e7d | 925 | del_timer_sync(&tp->timer); |
4d334fd1 | 926 | tty3270_free_screen(tp->screen, tp->view.rows); |
881e18f9 | 927 | tty3270_free_view(tp); |
1da177e4 LT |
928 | } |
929 | ||
930 | /* | |
931 | * Delayed freeing of tty3270 views. | |
932 | */ | |
933 | static void | |
934 | tty3270_del_views(void) | |
935 | { | |
1da177e4 LT |
936 | int i; |
937 | ||
c95571e6 MS |
938 | for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) { |
939 | struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i); | |
881e18f9 JS |
940 | if (!IS_ERR(view)) |
941 | raw3270_del_view(view); | |
1da177e4 LT |
942 | } |
943 | } | |
944 | ||
2b67fc46 | 945 | static struct raw3270_fn tty3270_fn = { |
1da177e4 LT |
946 | .activate = tty3270_activate, |
947 | .deactivate = tty3270_deactivate, | |
948 | .intv = (void *) tty3270_irq, | |
949 | .release = tty3270_release, | |
4d334fd1 MS |
950 | .free = tty3270_free, |
951 | .resize = tty3270_resize | |
1da177e4 LT |
952 | }; |
953 | ||
954 | /* | |
20cda6f2 | 955 | * This routine is called whenever a 3270 tty is opened first time. |
1da177e4 | 956 | */ |
20cda6f2 | 957 | static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 | 958 | { |
881e18f9 | 959 | struct raw3270_view *view; |
1da177e4 LT |
960 | struct tty3270 *tp; |
961 | int i, rc; | |
962 | ||
1da177e4 | 963 | /* Check if the tty3270 is already there. */ |
1fcbba3d | 964 | view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR); |
881e18f9 JS |
965 | if (!IS_ERR(view)) { |
966 | tp = container_of(view, struct tty3270, view); | |
1da177e4 LT |
967 | tty->driver_data = tp; |
968 | tty->winsize.ws_row = tp->view.rows - 2; | |
969 | tty->winsize.ws_col = tp->view.cols; | |
d6c53c0e | 970 | tp->port.low_latency = 0; |
1da177e4 | 971 | tp->inattr = TF_INPUT; |
b512353c | 972 | goto port_install; |
1da177e4 | 973 | } |
1fcbba3d MS |
974 | if (tty3270_max_index < tty->index + 1) |
975 | tty3270_max_index = tty->index + 1; | |
1da177e4 LT |
976 | |
977 | /* Allocate tty3270 structure on first open. */ | |
978 | tp = tty3270_alloc_view(); | |
979 | if (IS_ERR(tp)) | |
980 | return PTR_ERR(tp); | |
981 | ||
1fcbba3d MS |
982 | rc = raw3270_add_view(&tp->view, &tty3270_fn, |
983 | tty->index + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
984 | if (rc) { |
985 | tty3270_free_view(tp); | |
986 | return rc; | |
987 | } | |
988 | ||
36d9f4d3 | 989 | tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols); |
4d334fd1 MS |
990 | if (IS_ERR(tp->screen)) { |
991 | rc = PTR_ERR(tp->screen); | |
1da177e4 | 992 | raw3270_put_view(&tp->view); |
ed3cb6f0 | 993 | raw3270_del_view(&tp->view); |
4d334fd1 | 994 | tty3270_free_view(tp); |
1da177e4 LT |
995 | return rc; |
996 | } | |
997 | ||
d6c53c0e | 998 | tp->port.low_latency = 0; |
1da177e4 LT |
999 | tty->winsize.ws_row = tp->view.rows - 2; |
1000 | tty->winsize.ws_col = tp->view.cols; | |
1001 | ||
1002 | tty3270_create_prompt(tp); | |
1003 | tty3270_create_status(tp); | |
1004 | tty3270_update_status(tp); | |
1005 | ||
1006 | /* Create blank line for every line in the tty output area. */ | |
1007 | for (i = 0; i < tp->view.rows - 2; i++) | |
1008 | tty3270_blank_line(tp); | |
1009 | ||
ba186e7d | 1010 | tp->kbd->port = &tp->port; |
1da177e4 LT |
1011 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; |
1012 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
1013 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
1014 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
1015 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
1016 | ||
1017 | raw3270_activate_view(&tp->view); | |
20cda6f2 | 1018 | |
b512353c | 1019 | port_install: |
20cda6f2 JS |
1020 | rc = tty_port_install(&tp->port, driver, tty); |
1021 | if (rc) { | |
1022 | raw3270_put_view(&tp->view); | |
1023 | return rc; | |
1024 | } | |
1025 | ||
1026 | tty->driver_data = tp; | |
1027 | ||
1da177e4 LT |
1028 | return 0; |
1029 | } | |
1030 | ||
736c9fd2 MS |
1031 | /* |
1032 | * This routine is called whenever a 3270 tty is opened. | |
1033 | */ | |
1034 | static int | |
1035 | tty3270_open(struct tty_struct *tty, struct file *filp) | |
1036 | { | |
1037 | struct tty3270 *tp = tty->driver_data; | |
1038 | struct tty_port *port = &tp->port; | |
1039 | ||
1040 | port->count++; | |
1041 | tty_port_tty_set(port, tty); | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1da177e4 LT |
1045 | /* |
1046 | * This routine is called when the 3270 tty is closed. We wait | |
1047 | * for the remaining request to be completed. Then we clean up. | |
1048 | */ | |
1049 | static void | |
1050 | tty3270_close(struct tty_struct *tty, struct file * filp) | |
1051 | { | |
881e18f9 | 1052 | struct tty3270 *tp = tty->driver_data; |
1da177e4 LT |
1053 | |
1054 | if (tty->count > 1) | |
1055 | return; | |
b512353c | 1056 | if (tp) |
ba186e7d | 1057 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
1058 | } |
1059 | ||
20cda6f2 JS |
1060 | static void tty3270_cleanup(struct tty_struct *tty) |
1061 | { | |
1062 | struct tty3270 *tp = tty->driver_data; | |
1063 | ||
b512353c MS |
1064 | if (tp) { |
1065 | tty->driver_data = NULL; | |
20cda6f2 | 1066 | raw3270_put_view(&tp->view); |
b512353c | 1067 | } |
20cda6f2 JS |
1068 | } |
1069 | ||
1da177e4 LT |
1070 | /* |
1071 | * We always have room. | |
1072 | */ | |
1073 | static int | |
1074 | tty3270_write_room(struct tty_struct *tty) | |
1075 | { | |
1076 | return INT_MAX; | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Insert character into the screen at the current position with the | |
1081 | * current color and highlight. This function does NOT do cursor movement. | |
1082 | */ | |
74c76c84 | 1083 | static void tty3270_put_character(struct tty3270 *tp, char ch) |
1da177e4 LT |
1084 | { |
1085 | struct tty3270_line *line; | |
1086 | struct tty3270_cell *cell; | |
1087 | ||
1088 | line = tp->screen + tp->cy; | |
1089 | if (line->len <= tp->cx) { | |
1090 | while (line->len < tp->cx) { | |
1091 | cell = line->cells + line->len; | |
1092 | cell->character = tp->view.ascebc[' ']; | |
1093 | cell->highlight = tp->highlight; | |
1094 | cell->f_color = tp->f_color; | |
1095 | line->len++; | |
1096 | } | |
1097 | line->len++; | |
1098 | } | |
1099 | cell = line->cells + tp->cx; | |
1100 | cell->character = tp->view.ascebc[(unsigned int) ch]; | |
1101 | cell->highlight = tp->highlight; | |
1102 | cell->f_color = tp->f_color; | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
1107 | */ | |
1108 | static void | |
1109 | tty3270_convert_line(struct tty3270 *tp, int line_nr) | |
1110 | { | |
1111 | struct tty3270_line *line; | |
1112 | struct tty3270_cell *cell; | |
1113 | struct string *s, *n; | |
1114 | unsigned char highlight; | |
1115 | unsigned char f_color; | |
1116 | char *cp; | |
1117 | int flen, i; | |
1118 | ||
1119 | /* Determine how long the fragment will be. */ | |
1120 | flen = 3; /* Prefix (TO_SBA). */ | |
1121 | line = tp->screen + line_nr; | |
1122 | flen += line->len; | |
1123 | highlight = TAX_RESET; | |
1124 | f_color = TAC_RESET; | |
1125 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1126 | if (cell->highlight != highlight) { | |
1127 | flen += 3; /* TO_SA to switch highlight. */ | |
1128 | highlight = cell->highlight; | |
1129 | } | |
1130 | if (cell->f_color != f_color) { | |
1131 | flen += 3; /* TO_SA to switch color. */ | |
1132 | f_color = cell->f_color; | |
1133 | } | |
1134 | } | |
1135 | if (highlight != TAX_RESET) | |
1136 | flen += 3; /* TO_SA to reset hightlight. */ | |
1137 | if (f_color != TAC_RESET) | |
1138 | flen += 3; /* TO_SA to reset color. */ | |
1139 | if (line->len < tp->view.cols) | |
1140 | flen += 4; /* Postfix (TO_RA). */ | |
1141 | ||
1142 | /* Find the line in the list. */ | |
1143 | i = tp->view.rows - 2 - line_nr; | |
1144 | list_for_each_entry_reverse(s, &tp->lines, list) | |
1145 | if (--i <= 0) | |
1146 | break; | |
1147 | /* | |
1148 | * Check if the line needs to get reallocated. | |
1149 | */ | |
1150 | if (s->len != flen) { | |
1151 | /* Reallocate string. */ | |
1152 | n = tty3270_alloc_string(tp, flen); | |
1153 | list_add(&n->list, &s->list); | |
1154 | list_del_init(&s->list); | |
1155 | if (!list_empty(&s->update)) | |
1156 | list_del_init(&s->update); | |
1157 | free_string(&tp->freemem, s); | |
1158 | s = n; | |
1159 | } | |
1160 | ||
1161 | /* Write 3270 data fragment. */ | |
1162 | cp = s->string; | |
1163 | *cp++ = TO_SBA; | |
1164 | *cp++ = 0; | |
1165 | *cp++ = 0; | |
1166 | ||
1167 | highlight = TAX_RESET; | |
1168 | f_color = TAC_RESET; | |
1169 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1170 | if (cell->highlight != highlight) { | |
1171 | *cp++ = TO_SA; | |
1172 | *cp++ = TAT_EXTHI; | |
1173 | *cp++ = cell->highlight; | |
1174 | highlight = cell->highlight; | |
1175 | } | |
1176 | if (cell->f_color != f_color) { | |
1177 | *cp++ = TO_SA; | |
1178 | *cp++ = TAT_COLOR; | |
1179 | *cp++ = cell->f_color; | |
1180 | f_color = cell->f_color; | |
1181 | } | |
1182 | *cp++ = cell->character; | |
1183 | } | |
1184 | if (highlight != TAX_RESET) { | |
1185 | *cp++ = TO_SA; | |
1186 | *cp++ = TAT_EXTHI; | |
1187 | *cp++ = TAX_RESET; | |
1188 | } | |
1189 | if (f_color != TAC_RESET) { | |
1190 | *cp++ = TO_SA; | |
1191 | *cp++ = TAT_COLOR; | |
1192 | *cp++ = TAC_RESET; | |
1193 | } | |
1194 | if (line->len < tp->view.cols) { | |
1195 | *cp++ = TO_RA; | |
1196 | *cp++ = 0; | |
1197 | *cp++ = 0; | |
1198 | *cp++ = 0; | |
1199 | } | |
1200 | ||
1201 | if (tp->nr_up + line_nr < tp->view.rows - 2) { | |
1202 | /* Line is currently visible on screen. */ | |
1203 | tty3270_update_string(tp, s, line_nr); | |
1204 | /* Add line to update list. */ | |
1205 | if (list_empty(&s->update)) { | |
1206 | list_add_tail(&s->update, &tp->update); | |
1207 | tp->update_flags |= TTY_UPDATE_LIST; | |
1208 | } | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Do carriage return. | |
1214 | */ | |
1215 | static void | |
1216 | tty3270_cr(struct tty3270 *tp) | |
1217 | { | |
1218 | tp->cx = 0; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * Do line feed. | |
1223 | */ | |
1224 | static void | |
1225 | tty3270_lf(struct tty3270 *tp) | |
1226 | { | |
1227 | struct tty3270_line temp; | |
1228 | int i; | |
1229 | ||
1230 | tty3270_convert_line(tp, tp->cy); | |
1231 | if (tp->cy < tp->view.rows - 3) { | |
1232 | tp->cy++; | |
1233 | return; | |
1234 | } | |
1235 | /* Last line just filled up. Add new, blank line. */ | |
1236 | tty3270_blank_line(tp); | |
1237 | temp = tp->screen[0]; | |
1238 | temp.len = 0; | |
1239 | for (i = 0; i < tp->view.rows - 3; i++) | |
1240 | tp->screen[i] = tp->screen[i+1]; | |
1241 | tp->screen[tp->view.rows - 3] = temp; | |
1242 | tty3270_rebuild_update(tp); | |
1243 | } | |
1244 | ||
1245 | static void | |
1246 | tty3270_ri(struct tty3270 *tp) | |
1247 | { | |
1248 | if (tp->cy > 0) { | |
1249 | tty3270_convert_line(tp, tp->cy); | |
1250 | tp->cy--; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Insert characters at current position. | |
1256 | */ | |
1257 | static void | |
1258 | tty3270_insert_characters(struct tty3270 *tp, int n) | |
1259 | { | |
1260 | struct tty3270_line *line; | |
1261 | int k; | |
1262 | ||
1263 | line = tp->screen + tp->cy; | |
1264 | while (line->len < tp->cx) { | |
1265 | line->cells[line->len].character = tp->view.ascebc[' ']; | |
1266 | line->cells[line->len].highlight = TAX_RESET; | |
1267 | line->cells[line->len].f_color = TAC_RESET; | |
1268 | line->len++; | |
1269 | } | |
1270 | if (n > tp->view.cols - tp->cx) | |
1271 | n = tp->view.cols - tp->cx; | |
1272 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1273 | while (k--) | |
1274 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1275 | line->len += n; | |
1276 | if (line->len > tp->view.cols) | |
1277 | line->len = tp->view.cols; | |
1278 | while (n-- > 0) { | |
1279 | line->cells[tp->cx + n].character = tp->view.ascebc[' ']; | |
1280 | line->cells[tp->cx + n].highlight = tp->highlight; | |
1281 | line->cells[tp->cx + n].f_color = tp->f_color; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Delete characters at current position. | |
1287 | */ | |
1288 | static void | |
1289 | tty3270_delete_characters(struct tty3270 *tp, int n) | |
1290 | { | |
1291 | struct tty3270_line *line; | |
1292 | int i; | |
1293 | ||
1294 | line = tp->screen + tp->cy; | |
1295 | if (line->len <= tp->cx) | |
1296 | return; | |
1297 | if (line->len - tp->cx <= n) { | |
1298 | line->len = tp->cx; | |
1299 | return; | |
1300 | } | |
1301 | for (i = tp->cx; i + n < line->len; i++) | |
1302 | line->cells[i] = line->cells[i + n]; | |
1303 | line->len -= n; | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Erase characters at current position. | |
1308 | */ | |
1309 | static void | |
1310 | tty3270_erase_characters(struct tty3270 *tp, int n) | |
1311 | { | |
1312 | struct tty3270_line *line; | |
1313 | struct tty3270_cell *cell; | |
1314 | ||
1315 | line = tp->screen + tp->cy; | |
1316 | while (line->len > tp->cx && n-- > 0) { | |
1317 | cell = line->cells + tp->cx++; | |
1318 | cell->character = ' '; | |
1319 | cell->highlight = TAX_RESET; | |
1320 | cell->f_color = TAC_RESET; | |
1321 | } | |
1322 | tp->cx += n; | |
1323 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Erase line, 3 different cases: | |
1328 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1329 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1330 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1331 | */ | |
1332 | static void | |
1333 | tty3270_erase_line(struct tty3270 *tp, int mode) | |
1334 | { | |
1335 | struct tty3270_line *line; | |
1336 | struct tty3270_cell *cell; | |
1337 | int i; | |
1338 | ||
1339 | line = tp->screen + tp->cy; | |
1340 | if (mode == 0) | |
1341 | line->len = tp->cx; | |
1342 | else if (mode == 1) { | |
1343 | for (i = 0; i < tp->cx; i++) { | |
1344 | cell = line->cells + i; | |
1345 | cell->character = ' '; | |
1346 | cell->highlight = TAX_RESET; | |
1347 | cell->f_color = TAC_RESET; | |
1348 | } | |
1349 | if (line->len <= tp->cx) | |
1350 | line->len = tp->cx + 1; | |
1351 | } else if (mode == 2) | |
1352 | line->len = 0; | |
1353 | tty3270_convert_line(tp, tp->cy); | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Erase display, 3 different cases: | |
1358 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1359 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1360 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1361 | */ | |
1362 | static void | |
1363 | tty3270_erase_display(struct tty3270 *tp, int mode) | |
1364 | { | |
1365 | int i; | |
1366 | ||
1367 | if (mode == 0) { | |
1368 | tty3270_erase_line(tp, 0); | |
1369 | for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { | |
1370 | tp->screen[i].len = 0; | |
1371 | tty3270_convert_line(tp, i); | |
1372 | } | |
1373 | } else if (mode == 1) { | |
1374 | for (i = 0; i < tp->cy; i++) { | |
1375 | tp->screen[i].len = 0; | |
1376 | tty3270_convert_line(tp, i); | |
1377 | } | |
1378 | tty3270_erase_line(tp, 1); | |
1379 | } else if (mode == 2) { | |
1380 | for (i = 0; i < tp->view.rows - 2; i++) { | |
1381 | tp->screen[i].len = 0; | |
1382 | tty3270_convert_line(tp, i); | |
1383 | } | |
1384 | } | |
1385 | tty3270_rebuild_update(tp); | |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * Set attributes found in an escape sequence. | |
1390 | * Esc [ <attr> ; <attr> ; ... m | |
1391 | */ | |
1392 | static void | |
1393 | tty3270_set_attributes(struct tty3270 *tp) | |
1394 | { | |
1395 | static unsigned char f_colors[] = { | |
1396 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, | |
1397 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1398 | }; | |
1399 | int i, attr; | |
1400 | ||
1401 | for (i = 0; i <= tp->esc_npar; i++) { | |
1402 | attr = tp->esc_par[i]; | |
1403 | switch (attr) { | |
1404 | case 0: /* Reset */ | |
1405 | tp->highlight = TAX_RESET; | |
1406 | tp->f_color = TAC_RESET; | |
1407 | break; | |
1408 | /* Highlight. */ | |
1409 | case 4: /* Start underlining. */ | |
1410 | tp->highlight = TAX_UNDER; | |
1411 | break; | |
1412 | case 5: /* Start blink. */ | |
1413 | tp->highlight = TAX_BLINK; | |
1414 | break; | |
1415 | case 7: /* Start reverse. */ | |
1416 | tp->highlight = TAX_REVER; | |
1417 | break; | |
1418 | case 24: /* End underlining */ | |
1419 | if (tp->highlight == TAX_UNDER) | |
1420 | tp->highlight = TAX_RESET; | |
1421 | break; | |
1422 | case 25: /* End blink. */ | |
1423 | if (tp->highlight == TAX_BLINK) | |
1424 | tp->highlight = TAX_RESET; | |
1425 | break; | |
1426 | case 27: /* End reverse. */ | |
1427 | if (tp->highlight == TAX_REVER) | |
1428 | tp->highlight = TAX_RESET; | |
1429 | break; | |
1430 | /* Foreground color. */ | |
1431 | case 30: /* Black */ | |
1432 | case 31: /* Red */ | |
1433 | case 32: /* Green */ | |
1434 | case 33: /* Yellow */ | |
1435 | case 34: /* Blue */ | |
1436 | case 35: /* Magenta */ | |
1437 | case 36: /* Cyan */ | |
1438 | case 37: /* White */ | |
1439 | case 39: /* Black */ | |
1440 | tp->f_color = f_colors[attr - 30]; | |
1441 | break; | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | static inline int | |
1447 | tty3270_getpar(struct tty3270 *tp, int ix) | |
1448 | { | |
1449 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1450 | } | |
1451 | ||
1452 | static void | |
1453 | tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) | |
1454 | { | |
364c8558 HC |
1455 | int max_cx = max(0, cx); |
1456 | int max_cy = max(0, cy); | |
1457 | ||
1458 | tp->cx = min_t(int, tp->view.cols - 1, max_cx); | |
1459 | cy = min_t(int, tp->view.rows - 3, max_cy); | |
1da177e4 LT |
1460 | if (cy != tp->cy) { |
1461 | tty3270_convert_line(tp, tp->cy); | |
1462 | tp->cy = cy; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * Process escape sequences. Known sequences: | |
1468 | * Esc 7 Save Cursor Position | |
1469 | * Esc 8 Restore Cursor Position | |
1470 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1471 | * Esc [ Pn ; Pn H Cursor Position | |
1472 | * Esc [ Pn ; Pn f Cursor Position | |
1473 | * Esc [ Pn A Cursor Up | |
1474 | * Esc [ Pn B Cursor Down | |
1475 | * Esc [ Pn C Cursor Forward | |
1476 | * Esc [ Pn D Cursor Backward | |
1477 | * Esc [ Pn G Cursor Horizontal Absolute | |
1478 | * Esc [ Pn X Erase Characters | |
1479 | * Esc [ Ps J Erase in Display | |
1480 | * Esc [ Ps K Erase in Line | |
1481 | * // FIXME: add all the new ones. | |
1482 | * | |
1483 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1484 | * Ps is a selective parameter. | |
1485 | */ | |
1486 | static void | |
1487 | tty3270_escape_sequence(struct tty3270 *tp, char ch) | |
1488 | { | |
1489 | enum { ESnormal, ESesc, ESsquare, ESgetpars }; | |
1490 | ||
1491 | if (tp->esc_state == ESnormal) { | |
1492 | if (ch == 0x1b) | |
1493 | /* Starting new escape sequence. */ | |
1494 | tp->esc_state = ESesc; | |
1495 | return; | |
1496 | } | |
1497 | if (tp->esc_state == ESesc) { | |
1498 | tp->esc_state = ESnormal; | |
1499 | switch (ch) { | |
1500 | case '[': | |
1501 | tp->esc_state = ESsquare; | |
1502 | break; | |
1503 | case 'E': | |
1504 | tty3270_cr(tp); | |
1505 | tty3270_lf(tp); | |
1506 | break; | |
1507 | case 'M': | |
1508 | tty3270_ri(tp); | |
1509 | break; | |
1510 | case 'D': | |
1511 | tty3270_lf(tp); | |
1512 | break; | |
1513 | case 'Z': /* Respond ID. */ | |
ba186e7d | 1514 | kbd_puts_queue(&tp->port, "\033[?6c"); |
1da177e4 LT |
1515 | break; |
1516 | case '7': /* Save cursor position. */ | |
1517 | tp->saved_cx = tp->cx; | |
1518 | tp->saved_cy = tp->cy; | |
1519 | tp->saved_highlight = tp->highlight; | |
1520 | tp->saved_f_color = tp->f_color; | |
1521 | break; | |
1522 | case '8': /* Restore cursor position. */ | |
1523 | tty3270_convert_line(tp, tp->cy); | |
1524 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1525 | tp->highlight = tp->saved_highlight; | |
1526 | tp->f_color = tp->saved_f_color; | |
1527 | break; | |
1528 | case 'c': /* Reset terminal. */ | |
1529 | tp->cx = tp->saved_cx = 0; | |
1530 | tp->cy = tp->saved_cy = 0; | |
1531 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1532 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1533 | tty3270_erase_display(tp, 2); | |
1534 | break; | |
1535 | } | |
1536 | return; | |
1537 | } | |
1538 | if (tp->esc_state == ESsquare) { | |
1539 | tp->esc_state = ESgetpars; | |
1540 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1541 | tp->esc_npar = 0; | |
1542 | tp->esc_ques = (ch == '?'); | |
1543 | if (tp->esc_ques) | |
1544 | return; | |
1545 | } | |
1546 | if (tp->esc_state == ESgetpars) { | |
1547 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { | |
1548 | tp->esc_npar++; | |
1549 | return; | |
1550 | } | |
1551 | if (ch >= '0' && ch <= '9') { | |
1552 | tp->esc_par[tp->esc_npar] *= 10; | |
1553 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1554 | return; | |
1555 | } | |
1556 | } | |
1557 | tp->esc_state = ESnormal; | |
1558 | if (ch == 'n' && !tp->esc_ques) { | |
1559 | if (tp->esc_par[0] == 5) /* Status report. */ | |
ba186e7d | 1560 | kbd_puts_queue(&tp->port, "\033[0n"); |
1da177e4 LT |
1561 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ |
1562 | char buf[40]; | |
1563 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
ba186e7d | 1564 | kbd_puts_queue(&tp->port, buf); |
1da177e4 LT |
1565 | } |
1566 | return; | |
1567 | } | |
1568 | if (tp->esc_ques) | |
1569 | return; | |
1570 | switch (ch) { | |
1571 | case 'm': | |
1572 | tty3270_set_attributes(tp); | |
1573 | break; | |
1574 | case 'H': /* Set cursor position. */ | |
1575 | case 'f': | |
1576 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1577 | tty3270_getpar(tp, 0) - 1); | |
1578 | break; | |
1579 | case 'd': /* Set y position. */ | |
1580 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1581 | break; | |
1582 | case 'A': /* Cursor up. */ | |
1583 | case 'F': | |
1584 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1585 | break; | |
1586 | case 'B': /* Cursor down. */ | |
1587 | case 'e': | |
1588 | case 'E': | |
1589 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1590 | break; | |
1591 | case 'C': /* Cursor forward. */ | |
1592 | case 'a': | |
1593 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1594 | break; | |
1595 | case 'D': /* Cursor backward. */ | |
1596 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1597 | break; | |
1598 | case 'G': /* Set x position. */ | |
1599 | case '`': | |
1600 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1601 | break; | |
1602 | case 'X': /* Erase Characters. */ | |
1603 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1604 | break; | |
1605 | case 'J': /* Erase display. */ | |
1606 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1607 | break; | |
1608 | case 'K': /* Erase line. */ | |
1609 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1610 | break; | |
1611 | case 'P': /* Delete characters. */ | |
1612 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1613 | break; | |
1614 | case '@': /* Insert characters. */ | |
1615 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1616 | break; | |
1617 | case 's': /* Save cursor position. */ | |
1618 | tp->saved_cx = tp->cx; | |
1619 | tp->saved_cy = tp->cy; | |
1620 | tp->saved_highlight = tp->highlight; | |
1621 | tp->saved_f_color = tp->f_color; | |
1622 | break; | |
1623 | case 'u': /* Restore cursor position. */ | |
1624 | tty3270_convert_line(tp, tp->cy); | |
1625 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1626 | tp->highlight = tp->saved_highlight; | |
1627 | tp->f_color = tp->saved_f_color; | |
1628 | break; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * String write routine for 3270 ttys | |
1634 | */ | |
1635 | static void | |
20acdfa8 JS |
1636 | tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty, |
1637 | const unsigned char *buf, int count) | |
1da177e4 LT |
1638 | { |
1639 | int i_msg, i; | |
1640 | ||
1641 | spin_lock_bh(&tp->view.lock); | |
20acdfa8 | 1642 | for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) { |
1da177e4 LT |
1643 | if (tp->esc_state != 0) { |
1644 | /* Continue escape sequence. */ | |
1645 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1646 | continue; | |
1647 | } | |
1648 | ||
1649 | switch (buf[i_msg]) { | |
1650 | case 0x07: /* '\a' -- Alarm */ | |
1651 | tp->wcc |= TW_PLUSALARM; | |
1652 | break; | |
1653 | case 0x08: /* Backspace. */ | |
1654 | if (tp->cx > 0) { | |
1655 | tp->cx--; | |
1656 | tty3270_put_character(tp, ' '); | |
1657 | } | |
1658 | break; | |
1659 | case 0x09: /* '\t' -- Tabulate */ | |
1660 | for (i = tp->cx % 8; i < 8; i++) { | |
1661 | if (tp->cx >= tp->view.cols) { | |
1662 | tty3270_cr(tp); | |
1663 | tty3270_lf(tp); | |
1664 | break; | |
1665 | } | |
1666 | tty3270_put_character(tp, ' '); | |
1667 | tp->cx++; | |
1668 | } | |
1669 | break; | |
1670 | case 0x0a: /* '\n' -- New Line */ | |
1671 | tty3270_cr(tp); | |
1672 | tty3270_lf(tp); | |
1673 | break; | |
1674 | case 0x0c: /* '\f' -- Form Feed */ | |
1675 | tty3270_erase_display(tp, 2); | |
1676 | tp->cx = tp->cy = 0; | |
1677 | break; | |
1678 | case 0x0d: /* '\r' -- Carriage Return */ | |
1679 | tp->cx = 0; | |
1680 | break; | |
1681 | case 0x0f: /* SuSE "exit alternate mode" */ | |
1682 | break; | |
1683 | case 0x1b: /* Start escape sequence. */ | |
1684 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1685 | break; | |
1686 | default: /* Insert normal character. */ | |
1687 | if (tp->cx >= tp->view.cols) { | |
1688 | tty3270_cr(tp); | |
1689 | tty3270_lf(tp); | |
1690 | } | |
1691 | tty3270_put_character(tp, buf[i_msg]); | |
1692 | tp->cx++; | |
1693 | break; | |
1694 | } | |
1695 | } | |
1696 | /* Convert current line to 3270 data fragment. */ | |
1697 | tty3270_convert_line(tp, tp->cy); | |
1698 | ||
1699 | /* Setup timer to update display after 1/10 second */ | |
1700 | if (!timer_pending(&tp->timer)) | |
1701 | tty3270_set_timer(tp, HZ/10); | |
1702 | ||
1703 | spin_unlock_bh(&tp->view.lock); | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * String write routine for 3270 ttys | |
1708 | */ | |
1709 | static int | |
1710 | tty3270_write(struct tty_struct * tty, | |
1711 | const unsigned char *buf, int count) | |
1712 | { | |
1713 | struct tty3270 *tp; | |
1714 | ||
1715 | tp = tty->driver_data; | |
1716 | if (!tp) | |
1717 | return 0; | |
1718 | if (tp->char_count > 0) { | |
20acdfa8 | 1719 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1720 | tp->char_count = 0; |
1721 | } | |
20acdfa8 | 1722 | tty3270_do_write(tp, tty, buf, count); |
1da177e4 LT |
1723 | return count; |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Put single characters to the ttys character buffer | |
1728 | */ | |
74c76c84 | 1729 | static int tty3270_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1730 | { |
1731 | struct tty3270 *tp; | |
1732 | ||
1733 | tp = tty->driver_data; | |
74c76c84 HC |
1734 | if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE) |
1735 | return 0; | |
1736 | tp->char_buf[tp->char_count++] = ch; | |
1737 | return 1; | |
1da177e4 LT |
1738 | } |
1739 | ||
1740 | /* | |
1741 | * Flush all characters from the ttys characeter buffer put there | |
1742 | * by tty3270_put_char. | |
1743 | */ | |
1744 | static void | |
1745 | tty3270_flush_chars(struct tty_struct *tty) | |
1746 | { | |
1747 | struct tty3270 *tp; | |
1748 | ||
1749 | tp = tty->driver_data; | |
1750 | if (!tp) | |
1751 | return; | |
1752 | if (tp->char_count > 0) { | |
20acdfa8 | 1753 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1754 | tp->char_count = 0; |
1755 | } | |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * Returns the number of characters in the output buffer. This is | |
1760 | * used in tty_wait_until_sent to wait until all characters have | |
1761 | * appeared on the screen. | |
1762 | */ | |
1763 | static int | |
1764 | tty3270_chars_in_buffer(struct tty_struct *tty) | |
1765 | { | |
1766 | return 0; | |
1767 | } | |
1768 | ||
1769 | static void | |
1770 | tty3270_flush_buffer(struct tty_struct *tty) | |
1771 | { | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * Check for visible/invisible input switches | |
1776 | */ | |
1777 | static void | |
606d099c | 1778 | tty3270_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 LT |
1779 | { |
1780 | struct tty3270 *tp; | |
1781 | int new; | |
1782 | ||
1783 | tp = tty->driver_data; | |
1784 | if (!tp) | |
1785 | return; | |
1786 | spin_lock_bh(&tp->view.lock); | |
1787 | if (L_ICANON(tty)) { | |
1788 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1789 | if (new != tp->inattr) { | |
1790 | tp->inattr = new; | |
d2c993d8 | 1791 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
1792 | tty3270_set_timer(tp, 1); |
1793 | } | |
1794 | } | |
1795 | spin_unlock_bh(&tp->view.lock); | |
1796 | } | |
1797 | ||
1798 | /* | |
1799 | * Disable reading from a 3270 tty | |
1800 | */ | |
1801 | static void | |
1802 | tty3270_throttle(struct tty_struct * tty) | |
1803 | { | |
1804 | struct tty3270 *tp; | |
1805 | ||
1806 | tp = tty->driver_data; | |
1807 | if (!tp) | |
1808 | return; | |
1809 | tp->throttle = 1; | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Enable reading from a 3270 tty | |
1814 | */ | |
1815 | static void | |
1816 | tty3270_unthrottle(struct tty_struct * tty) | |
1817 | { | |
1818 | struct tty3270 *tp; | |
1819 | ||
1820 | tp = tty->driver_data; | |
1821 | if (!tp) | |
1822 | return; | |
1823 | tp->throttle = 0; | |
1824 | if (tp->attn) | |
1825 | tty3270_issue_read(tp, 1); | |
1826 | } | |
1827 | ||
1828 | /* | |
1829 | * Hang up the tty device. | |
1830 | */ | |
1831 | static void | |
1832 | tty3270_hangup(struct tty_struct *tty) | |
1833 | { | |
0c756914 MS |
1834 | struct tty3270 *tp; |
1835 | ||
1836 | tp = tty->driver_data; | |
1837 | if (!tp) | |
1838 | return; | |
1839 | spin_lock_bh(&tp->view.lock); | |
1840 | tp->cx = tp->saved_cx = 0; | |
1841 | tp->cy = tp->saved_cy = 0; | |
1842 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1843 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1844 | tty3270_blank_screen(tp); | |
1845 | while (tp->nr_lines < tp->view.rows - 2) | |
1846 | tty3270_blank_line(tp); | |
1847 | tp->update_flags = TTY_UPDATE_ALL; | |
1848 | spin_unlock_bh(&tp->view.lock); | |
1849 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
1850 | } |
1851 | ||
1852 | static void | |
1853 | tty3270_wait_until_sent(struct tty_struct *tty, int timeout) | |
1854 | { | |
1855 | } | |
1856 | ||
65c56e07 HC |
1857 | static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd, |
1858 | unsigned long arg) | |
1da177e4 LT |
1859 | { |
1860 | struct tty3270 *tp; | |
1861 | ||
1862 | tp = tty->driver_data; | |
1863 | if (!tp) | |
1864 | return -ENODEV; | |
18900ca6 | 1865 | if (tty_io_error(tty)) |
1da177e4 | 1866 | return -EIO; |
65c56e07 | 1867 | return kbd_ioctl(tp->kbd, cmd, arg); |
1da177e4 LT |
1868 | } |
1869 | ||
9d4bfd41 | 1870 | #ifdef CONFIG_COMPAT |
65c56e07 HC |
1871 | static long tty3270_compat_ioctl(struct tty_struct *tty, |
1872 | unsigned int cmd, unsigned long arg) | |
9d4bfd41 AB |
1873 | { |
1874 | struct tty3270 *tp; | |
1875 | ||
1876 | tp = tty->driver_data; | |
1877 | if (!tp) | |
1878 | return -ENODEV; | |
18900ca6 | 1879 | if (tty_io_error(tty)) |
9d4bfd41 | 1880 | return -EIO; |
65c56e07 | 1881 | return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg)); |
9d4bfd41 AB |
1882 | } |
1883 | #endif | |
1884 | ||
b68e31d0 | 1885 | static const struct tty_operations tty3270_ops = { |
20cda6f2 JS |
1886 | .install = tty3270_install, |
1887 | .cleanup = tty3270_cleanup, | |
736c9fd2 | 1888 | .open = tty3270_open, |
1da177e4 LT |
1889 | .close = tty3270_close, |
1890 | .write = tty3270_write, | |
1891 | .put_char = tty3270_put_char, | |
1892 | .flush_chars = tty3270_flush_chars, | |
1893 | .write_room = tty3270_write_room, | |
1894 | .chars_in_buffer = tty3270_chars_in_buffer, | |
1895 | .flush_buffer = tty3270_flush_buffer, | |
1896 | .throttle = tty3270_throttle, | |
1897 | .unthrottle = tty3270_unthrottle, | |
1898 | .hangup = tty3270_hangup, | |
1899 | .wait_until_sent = tty3270_wait_until_sent, | |
1900 | .ioctl = tty3270_ioctl, | |
9d4bfd41 AB |
1901 | #ifdef CONFIG_COMPAT |
1902 | .compat_ioctl = tty3270_compat_ioctl, | |
1903 | #endif | |
1da177e4 LT |
1904 | .set_termios = tty3270_set_termios |
1905 | }; | |
1906 | ||
63df41d6 | 1907 | static void tty3270_create_cb(int minor) |
c95571e6 | 1908 | { |
1fcbba3d | 1909 | tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL); |
c95571e6 MS |
1910 | } |
1911 | ||
63df41d6 | 1912 | static void tty3270_destroy_cb(int minor) |
c95571e6 | 1913 | { |
1fcbba3d | 1914 | tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR); |
c95571e6 MS |
1915 | } |
1916 | ||
63df41d6 | 1917 | static struct raw3270_notifier tty3270_notifier = |
c95571e6 MS |
1918 | { |
1919 | .create = tty3270_create_cb, | |
1920 | .destroy = tty3270_destroy_cb, | |
1921 | }; | |
1922 | ||
1da177e4 LT |
1923 | /* |
1924 | * 3270 tty registration code called from tty_init(). | |
1925 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1926 | */ | |
2b67fc46 | 1927 | static int __init tty3270_init(void) |
1da177e4 LT |
1928 | { |
1929 | struct tty_driver *driver; | |
1930 | int ret; | |
1931 | ||
c95571e6 MS |
1932 | driver = tty_alloc_driver(RAW3270_MAXDEVS, |
1933 | TTY_DRIVER_REAL_RAW | | |
1934 | TTY_DRIVER_DYNAMIC_DEV | | |
1935 | TTY_DRIVER_RESET_TERMIOS); | |
1936 | if (IS_ERR(driver)) | |
1937 | return PTR_ERR(driver); | |
1da177e4 LT |
1938 | |
1939 | /* | |
1940 | * Initialize the tty_driver structure | |
1941 | * Entries in tty3270_driver that are NOT initialized: | |
1942 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1943 | */ | |
c95571e6 MS |
1944 | driver->driver_name = "tty3270"; |
1945 | driver->name = "3270/tty"; | |
1da177e4 | 1946 | driver->major = IBM_TTY3270_MAJOR; |
1fcbba3d MS |
1947 | driver->minor_start = RAW3270_FIRSTMINOR; |
1948 | driver->name_base = RAW3270_FIRSTMINOR; | |
1da177e4 LT |
1949 | driver->type = TTY_DRIVER_TYPE_SYSTEM; |
1950 | driver->subtype = SYSTEM_TYPE_TTY; | |
1951 | driver->init_termios = tty_std_termios; | |
1da177e4 LT |
1952 | tty_set_operations(driver, &tty3270_ops); |
1953 | ret = tty_register_driver(driver); | |
1954 | if (ret) { | |
1da177e4 LT |
1955 | put_tty_driver(driver); |
1956 | return ret; | |
1957 | } | |
1958 | tty3270_driver = driver; | |
c95571e6 | 1959 | raw3270_register_notifier(&tty3270_notifier); |
1da177e4 LT |
1960 | return 0; |
1961 | } | |
1962 | ||
1963 | static void __exit | |
1964 | tty3270_exit(void) | |
1965 | { | |
1966 | struct tty_driver *driver; | |
1967 | ||
c95571e6 | 1968 | raw3270_unregister_notifier(&tty3270_notifier); |
1da177e4 | 1969 | driver = tty3270_driver; |
d2c993d8 | 1970 | tty3270_driver = NULL; |
1da177e4 | 1971 | tty_unregister_driver(driver); |
2312e4f3 | 1972 | put_tty_driver(driver); |
1da177e4 LT |
1973 | tty3270_del_views(); |
1974 | } | |
1975 | ||
1976 | MODULE_LICENSE("GPL"); | |
1977 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
1978 | ||
1979 | module_init(tty3270_init); | |
1980 | module_exit(tty3270_exit); |