Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * IBM/3270 Driver - tty functions. |
3 | * | |
4 | * Author(s): | |
5 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
6 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
a53c8fab | 7 | * -- Copyright IBM Corp. 2003 |
1da177e4 LT |
8 | */ |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/types.h> | |
12 | #include <linux/kdev_t.h> | |
13 | #include <linux/tty.h> | |
14 | #include <linux/vt_kern.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/console.h> | |
17 | #include <linux/interrupt.h> | |
4d334fd1 | 18 | #include <linux/workqueue.h> |
1da177e4 LT |
19 | |
20 | #include <linux/slab.h> | |
21 | #include <linux/bootmem.h> | |
9d4bfd41 | 22 | #include <linux/compat.h> |
1da177e4 LT |
23 | |
24 | #include <asm/ccwdev.h> | |
25 | #include <asm/cio.h> | |
26 | #include <asm/ebcdic.h> | |
27 | #include <asm/uaccess.h> | |
28 | ||
1da177e4 | 29 | #include "raw3270.h" |
364c8558 | 30 | #include "tty3270.h" |
1da177e4 LT |
31 | #include "keyboard.h" |
32 | ||
33 | #define TTY3270_CHAR_BUF_SIZE 256 | |
34 | #define TTY3270_OUTPUT_BUFFER_SIZE 1024 | |
35 | #define TTY3270_STRING_PAGES 5 | |
36 | ||
37 | struct tty_driver *tty3270_driver; | |
38 | static int tty3270_max_index; | |
39 | ||
2b67fc46 | 40 | static struct raw3270_fn tty3270_fn; |
1da177e4 LT |
41 | |
42 | struct tty3270_cell { | |
43 | unsigned char character; | |
44 | unsigned char highlight; | |
45 | unsigned char f_color; | |
46 | }; | |
47 | ||
48 | struct tty3270_line { | |
49 | struct tty3270_cell *cells; | |
50 | int len; | |
51 | }; | |
52 | ||
53 | #define ESCAPE_NPAR 8 | |
54 | ||
55 | /* | |
56 | * The main tty view data structure. | |
57 | * FIXME: | |
58 | * 1) describe line orientation & lines list concept against screen | |
59 | * 2) describe conversion of screen to lines | |
60 | * 3) describe line format. | |
61 | */ | |
62 | struct tty3270 { | |
63 | struct raw3270_view view; | |
ba186e7d | 64 | struct tty_port port; |
1da177e4 LT |
65 | void **freemem_pages; /* Array of pages used for freemem. */ |
66 | struct list_head freemem; /* List of free memory for strings. */ | |
67 | ||
68 | /* Output stuff. */ | |
69 | struct list_head lines; /* List of lines. */ | |
70 | struct list_head update; /* List of lines to update. */ | |
71 | unsigned char wcc; /* Write control character. */ | |
72 | int nr_lines; /* # lines in list. */ | |
73 | int nr_up; /* # lines up in history. */ | |
74 | unsigned long update_flags; /* Update indication bits. */ | |
75 | struct string *status; /* Lower right of display. */ | |
76 | struct raw3270_request *write; /* Single write request. */ | |
77 | struct timer_list timer; /* Output delay timer. */ | |
78 | ||
79 | /* Current tty screen. */ | |
80 | unsigned int cx, cy; /* Current output position. */ | |
81 | unsigned int highlight; /* Blink/reverse/underscore */ | |
82 | unsigned int f_color; /* Foreground color */ | |
83 | struct tty3270_line *screen; | |
4d334fd1 MS |
84 | unsigned int n_model, n_cols, n_rows; /* New model & size */ |
85 | struct work_struct resize_work; | |
1da177e4 LT |
86 | |
87 | /* Input stuff. */ | |
88 | struct string *prompt; /* Output string for input area. */ | |
89 | struct string *input; /* Input string for read request. */ | |
90 | struct raw3270_request *read; /* Single read request. */ | |
91 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
92 | unsigned char inattr; /* Visible/invisible input. */ | |
93 | int throttle, attn; /* tty throttle/unthrottle. */ | |
94 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
95 | struct kbd_data *kbd; /* key_maps stuff. */ | |
96 | ||
97 | /* Escape sequence parsing. */ | |
98 | int esc_state, esc_ques, esc_npar; | |
99 | int esc_par[ESCAPE_NPAR]; | |
100 | unsigned int saved_cx, saved_cy; | |
101 | unsigned int saved_highlight, saved_f_color; | |
102 | ||
103 | /* Command recalling. */ | |
104 | struct list_head rcl_lines; /* List of recallable lines. */ | |
105 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
106 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
107 | ||
108 | /* Character array for put_char/flush_chars. */ | |
109 | unsigned int char_count; | |
110 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
111 | }; | |
112 | ||
113 | /* tty3270->update_flags. See tty3270_update for details. */ | |
114 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
115 | #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
116 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ | |
117 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
205d7ab9 | 118 | #define TTY_UPDATE_ALL 16 /* Recreate screen. */ |
1da177e4 LT |
119 | |
120 | static void tty3270_update(struct tty3270 *); | |
4d334fd1 | 121 | static void tty3270_resize_work(struct work_struct *work); |
1da177e4 LT |
122 | |
123 | /* | |
124 | * Setup timeout for a device. On timeout trigger an update. | |
125 | */ | |
2b67fc46 | 126 | static void tty3270_set_timer(struct tty3270 *tp, int expires) |
1da177e4 | 127 | { |
03439e7d | 128 | mod_timer(&tp->timer, jiffies + expires); |
1da177e4 LT |
129 | } |
130 | ||
131 | /* | |
132 | * The input line are the two last lines of the screen. | |
133 | */ | |
134 | static void | |
135 | tty3270_update_prompt(struct tty3270 *tp, char *input, int count) | |
136 | { | |
137 | struct string *line; | |
138 | unsigned int off; | |
139 | ||
140 | line = tp->prompt; | |
141 | if (count != 0) | |
142 | line->string[5] = TF_INMDT; | |
143 | else | |
144 | line->string[5] = tp->inattr; | |
145 | if (count > tp->view.cols * 2 - 11) | |
146 | count = tp->view.cols * 2 - 11; | |
147 | memcpy(line->string + 6, input, count); | |
148 | line->string[6 + count] = TO_IC; | |
149 | /* Clear to end of input line. */ | |
150 | if (count < tp->view.cols * 2 - 11) { | |
151 | line->string[7 + count] = TO_RA; | |
152 | line->string[10 + count] = 0; | |
153 | off = tp->view.cols * tp->view.rows - 9; | |
154 | raw3270_buffer_address(tp->view.dev, line->string+count+8, off); | |
155 | line->len = 11 + count; | |
156 | } else | |
157 | line->len = 7 + count; | |
158 | tp->update_flags |= TTY_UPDATE_INPUT; | |
159 | } | |
160 | ||
161 | static void | |
162 | tty3270_create_prompt(struct tty3270 *tp) | |
163 | { | |
164 | static const unsigned char blueprint[] = | |
165 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
166 | /* empty input string */ | |
167 | TO_IC, TO_RA, 0, 0, 0 }; | |
168 | struct string *line; | |
169 | unsigned int offset; | |
170 | ||
171 | line = alloc_string(&tp->freemem, | |
172 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
173 | tp->prompt = line; | |
174 | tp->inattr = TF_INPUT; | |
175 | /* Copy blueprint to status line */ | |
176 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
177 | line->len = sizeof(blueprint); | |
178 | /* Set output offsets. */ | |
179 | offset = tp->view.cols * (tp->view.rows - 2); | |
180 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
181 | offset = tp->view.cols * tp->view.rows - 9; | |
182 | raw3270_buffer_address(tp->view.dev, line->string + 8, offset); | |
183 | ||
184 | /* Allocate input string for reading. */ | |
185 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
186 | } | |
187 | ||
188 | /* | |
189 | * The status line is the last line of the screen. It shows the string | |
190 | * "Running"/"Holding" in the lower right corner of the screen. | |
191 | */ | |
192 | static void | |
193 | tty3270_update_status(struct tty3270 * tp) | |
194 | { | |
195 | char *str; | |
196 | ||
197 | str = (tp->nr_up != 0) ? "History" : "Running"; | |
198 | memcpy(tp->status->string + 8, str, 7); | |
199 | codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); | |
200 | tp->update_flags |= TTY_UPDATE_STATUS; | |
201 | } | |
202 | ||
203 | static void | |
204 | tty3270_create_status(struct tty3270 * tp) | |
205 | { | |
206 | static const unsigned char blueprint[] = | |
207 | { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, | |
208 | 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, | |
209 | TAC_RESET }; | |
210 | struct string *line; | |
211 | unsigned int offset; | |
212 | ||
213 | line = alloc_string(&tp->freemem,sizeof(blueprint)); | |
214 | tp->status = line; | |
215 | /* Copy blueprint to status line */ | |
216 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
217 | /* Set address to start of status string (= last 9 characters). */ | |
218 | offset = tp->view.cols * tp->view.rows - 9; | |
219 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Set output offsets to 3270 datastream fragment of a tty string. | |
224 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
225 | */ | |
226 | static void | |
227 | tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) | |
228 | { | |
229 | unsigned char *cp; | |
230 | ||
231 | raw3270_buffer_address(tp->view.dev, line->string + 1, | |
232 | tp->view.cols * nr); | |
233 | cp = line->string + line->len - 4; | |
234 | if (*cp == TO_RA) | |
235 | raw3270_buffer_address(tp->view.dev, cp + 1, | |
236 | tp->view.cols * (nr + 1)); | |
237 | } | |
238 | ||
239 | /* | |
240 | * Rebuild update list to print all lines. | |
241 | */ | |
242 | static void | |
243 | tty3270_rebuild_update(struct tty3270 *tp) | |
244 | { | |
245 | struct string *s, *n; | |
246 | int line, nr_up; | |
247 | ||
248 | /* | |
249 | * Throw away update list and create a new one, | |
250 | * containing all lines that will fit on the screen. | |
251 | */ | |
252 | list_for_each_entry_safe(s, n, &tp->update, update) | |
253 | list_del_init(&s->update); | |
254 | line = tp->view.rows - 3; | |
255 | nr_up = tp->nr_up; | |
256 | list_for_each_entry_reverse(s, &tp->lines, list) { | |
257 | if (nr_up > 0) { | |
258 | nr_up--; | |
259 | continue; | |
260 | } | |
261 | tty3270_update_string(tp, s, line); | |
262 | list_add(&s->update, &tp->update); | |
263 | if (--line < 0) | |
264 | break; | |
265 | } | |
266 | tp->update_flags |= TTY_UPDATE_LIST; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Alloc string for size bytes. If there is not enough room in | |
271 | * freemem, free strings until there is room. | |
272 | */ | |
273 | static struct string * | |
274 | tty3270_alloc_string(struct tty3270 *tp, size_t size) | |
275 | { | |
276 | struct string *s, *n; | |
277 | ||
278 | s = alloc_string(&tp->freemem, size); | |
279 | if (s) | |
280 | return s; | |
281 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
282 | BUG_ON(tp->nr_lines <= tp->view.rows - 2); | |
283 | list_del(&s->list); | |
284 | if (!list_empty(&s->update)) | |
285 | list_del(&s->update); | |
286 | tp->nr_lines--; | |
287 | if (free_string(&tp->freemem, s) >= size) | |
288 | break; | |
289 | } | |
290 | s = alloc_string(&tp->freemem, size); | |
291 | BUG_ON(!s); | |
292 | if (tp->nr_up != 0 && | |
293 | tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { | |
294 | tp->nr_up = tp->nr_lines - tp->view.rows + 2; | |
295 | tty3270_rebuild_update(tp); | |
296 | tty3270_update_status(tp); | |
297 | } | |
298 | return s; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Add an empty line to the list. | |
303 | */ | |
304 | static void | |
305 | tty3270_blank_line(struct tty3270 *tp) | |
306 | { | |
307 | static const unsigned char blueprint[] = | |
308 | { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, | |
309 | TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; | |
310 | struct string *s; | |
311 | ||
312 | s = tty3270_alloc_string(tp, sizeof(blueprint)); | |
313 | memcpy(s->string, blueprint, sizeof(blueprint)); | |
314 | s->len = sizeof(blueprint); | |
315 | list_add_tail(&s->list, &tp->lines); | |
316 | tp->nr_lines++; | |
317 | if (tp->nr_up != 0) | |
318 | tp->nr_up++; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Write request completion callback. | |
323 | */ | |
324 | static void | |
325 | tty3270_write_callback(struct raw3270_request *rq, void *data) | |
326 | { | |
881e18f9 | 327 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 | 328 | |
1da177e4 | 329 | if (rq->rc != 0) { |
25985edc | 330 | /* Write wasn't successful. Refresh all. */ |
1da177e4 LT |
331 | tp->update_flags = TTY_UPDATE_ALL; |
332 | tty3270_set_timer(tp, 1); | |
333 | } | |
334 | raw3270_request_reset(rq); | |
335 | xchg(&tp->write, rq); | |
336 | } | |
337 | ||
338 | /* | |
339 | * Update 3270 display. | |
340 | */ | |
341 | static void | |
342 | tty3270_update(struct tty3270 *tp) | |
343 | { | |
344 | static char invalid_sba[2] = { 0xff, 0xff }; | |
345 | struct raw3270_request *wrq; | |
346 | unsigned long updated; | |
347 | struct string *s, *n; | |
348 | char *sba, *str; | |
349 | int rc, len; | |
350 | ||
351 | wrq = xchg(&tp->write, 0); | |
352 | if (!wrq) { | |
353 | tty3270_set_timer(tp, 1); | |
354 | return; | |
355 | } | |
356 | ||
357 | spin_lock(&tp->view.lock); | |
358 | updated = 0; | |
205d7ab9 MS |
359 | if (tp->update_flags & TTY_UPDATE_ALL) { |
360 | tty3270_rebuild_update(tp); | |
361 | tty3270_update_status(tp); | |
362 | tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST | | |
363 | TTY_UPDATE_INPUT | TTY_UPDATE_STATUS; | |
364 | } | |
1da177e4 LT |
365 | if (tp->update_flags & TTY_UPDATE_ERASE) { |
366 | /* Use erase write alternate to erase display. */ | |
367 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
368 | updated |= TTY_UPDATE_ERASE; | |
369 | } else | |
370 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
371 | ||
372 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
373 | tp->wcc = TW_NONE; | |
374 | ||
375 | /* | |
376 | * Update status line. | |
377 | */ | |
378 | if (tp->update_flags & TTY_UPDATE_STATUS) | |
379 | if (raw3270_request_add_data(wrq, tp->status->string, | |
380 | tp->status->len) == 0) | |
381 | updated |= TTY_UPDATE_STATUS; | |
382 | ||
383 | /* | |
384 | * Write input line. | |
385 | */ | |
386 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
387 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
388 | tp->prompt->len) == 0) | |
389 | updated |= TTY_UPDATE_INPUT; | |
390 | ||
391 | sba = invalid_sba; | |
392 | ||
393 | if (tp->update_flags & TTY_UPDATE_LIST) { | |
394 | /* Write strings in the update list to the screen. */ | |
395 | list_for_each_entry_safe(s, n, &tp->update, update) { | |
396 | str = s->string; | |
397 | len = s->len; | |
398 | /* | |
399 | * Skip TO_SBA at the start of the string if the | |
400 | * last output position matches the start address | |
401 | * of this line. | |
402 | */ | |
403 | if (s->string[1] == sba[0] && s->string[2] == sba[1]) | |
404 | str += 3, len -= 3; | |
405 | if (raw3270_request_add_data(wrq, str, len) != 0) | |
406 | break; | |
407 | list_del_init(&s->update); | |
408 | sba = s->string + s->len - 3; | |
409 | } | |
410 | if (list_empty(&tp->update)) | |
411 | updated |= TTY_UPDATE_LIST; | |
412 | } | |
413 | wrq->callback = tty3270_write_callback; | |
414 | rc = raw3270_start(&tp->view, wrq); | |
415 | if (rc == 0) { | |
416 | tp->update_flags &= ~updated; | |
417 | if (tp->update_flags) | |
418 | tty3270_set_timer(tp, 1); | |
419 | } else { | |
420 | raw3270_request_reset(wrq); | |
421 | xchg(&tp->write, wrq); | |
422 | } | |
423 | spin_unlock(&tp->view.lock); | |
1da177e4 LT |
424 | } |
425 | ||
426 | /* | |
427 | * Command recalling. | |
428 | */ | |
429 | static void | |
430 | tty3270_rcl_add(struct tty3270 *tp, char *input, int len) | |
431 | { | |
432 | struct string *s; | |
433 | ||
d2c993d8 | 434 | tp->rcl_walk = NULL; |
1da177e4 LT |
435 | if (len <= 0) |
436 | return; | |
437 | if (tp->rcl_nr >= tp->rcl_max) { | |
438 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
439 | list_del(&s->list); | |
440 | free_string(&tp->freemem, s); | |
441 | tp->rcl_nr--; | |
442 | } | |
443 | s = tty3270_alloc_string(tp, len); | |
444 | memcpy(s->string, input, len); | |
445 | list_add_tail(&s->list, &tp->rcl_lines); | |
446 | tp->rcl_nr++; | |
447 | } | |
448 | ||
449 | static void | |
450 | tty3270_rcl_backward(struct kbd_data *kbd) | |
451 | { | |
ba186e7d | 452 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
453 | struct string *s; |
454 | ||
1da177e4 LT |
455 | spin_lock_bh(&tp->view.lock); |
456 | if (tp->inattr == TF_INPUT) { | |
457 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
458 | tp->rcl_walk = tp->rcl_walk->prev; | |
459 | else if (!list_empty(&tp->rcl_lines)) | |
460 | tp->rcl_walk = tp->rcl_lines.prev; | |
461 | s = tp->rcl_walk ? | |
d2c993d8 | 462 | list_entry(tp->rcl_walk, struct string, list) : NULL; |
1da177e4 LT |
463 | if (tp->rcl_walk) { |
464 | s = list_entry(tp->rcl_walk, struct string, list); | |
465 | tty3270_update_prompt(tp, s->string, s->len); | |
466 | } else | |
d2c993d8 | 467 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
468 | tty3270_set_timer(tp, 1); |
469 | } | |
470 | spin_unlock_bh(&tp->view.lock); | |
471 | } | |
472 | ||
473 | /* | |
474 | * Deactivate tty view. | |
475 | */ | |
476 | static void | |
477 | tty3270_exit_tty(struct kbd_data *kbd) | |
478 | { | |
ba186e7d | 479 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 480 | |
1da177e4 LT |
481 | raw3270_deactivate_view(&tp->view); |
482 | } | |
483 | ||
484 | /* | |
485 | * Scroll forward in history. | |
486 | */ | |
487 | static void | |
488 | tty3270_scroll_forward(struct kbd_data *kbd) | |
489 | { | |
ba186e7d | 490 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
491 | int nr_up; |
492 | ||
1da177e4 LT |
493 | spin_lock_bh(&tp->view.lock); |
494 | nr_up = tp->nr_up - tp->view.rows + 2; | |
495 | if (nr_up < 0) | |
496 | nr_up = 0; | |
497 | if (nr_up != tp->nr_up) { | |
498 | tp->nr_up = nr_up; | |
499 | tty3270_rebuild_update(tp); | |
500 | tty3270_update_status(tp); | |
501 | tty3270_set_timer(tp, 1); | |
502 | } | |
503 | spin_unlock_bh(&tp->view.lock); | |
504 | } | |
505 | ||
506 | /* | |
507 | * Scroll backward in history. | |
508 | */ | |
509 | static void | |
510 | tty3270_scroll_backward(struct kbd_data *kbd) | |
511 | { | |
ba186e7d | 512 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
513 | int nr_up; |
514 | ||
1da177e4 LT |
515 | spin_lock_bh(&tp->view.lock); |
516 | nr_up = tp->nr_up + tp->view.rows - 2; | |
517 | if (nr_up + tp->view.rows - 2 > tp->nr_lines) | |
518 | nr_up = tp->nr_lines - tp->view.rows + 2; | |
519 | if (nr_up != tp->nr_up) { | |
520 | tp->nr_up = nr_up; | |
521 | tty3270_rebuild_update(tp); | |
522 | tty3270_update_status(tp); | |
523 | tty3270_set_timer(tp, 1); | |
524 | } | |
525 | spin_unlock_bh(&tp->view.lock); | |
526 | } | |
527 | ||
528 | /* | |
529 | * Pass input line to tty. | |
530 | */ | |
531 | static void | |
532 | tty3270_read_tasklet(struct raw3270_request *rrq) | |
533 | { | |
534 | static char kreset_data = TW_KR; | |
881e18f9 | 535 | struct tty3270 *tp = container_of(rrq->view, struct tty3270, view); |
1da177e4 LT |
536 | char *input; |
537 | int len; | |
538 | ||
1da177e4 LT |
539 | spin_lock_bh(&tp->view.lock); |
540 | /* | |
541 | * Two AID keys are special: For 0x7d (enter) the input line | |
542 | * has to be emitted to the tty and for 0x6d the screen | |
543 | * needs to be redrawn. | |
544 | */ | |
d2c993d8 | 545 | input = NULL; |
1da177e4 LT |
546 | len = 0; |
547 | if (tp->input->string[0] == 0x7d) { | |
548 | /* Enter: write input to tty. */ | |
549 | input = tp->input->string + 6; | |
550 | len = tp->input->len - 6 - rrq->rescnt; | |
551 | if (tp->inattr != TF_INPUTN) | |
552 | tty3270_rcl_add(tp, input, len); | |
553 | if (tp->nr_up > 0) { | |
554 | tp->nr_up = 0; | |
555 | tty3270_rebuild_update(tp); | |
556 | tty3270_update_status(tp); | |
557 | } | |
558 | /* Clear input area. */ | |
d2c993d8 | 559 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
560 | tty3270_set_timer(tp, 1); |
561 | } else if (tp->input->string[0] == 0x6d) { | |
562 | /* Display has been cleared. Redraw. */ | |
1da177e4 LT |
563 | tp->update_flags = TTY_UPDATE_ALL; |
564 | tty3270_set_timer(tp, 1); | |
565 | } | |
566 | spin_unlock_bh(&tp->view.lock); | |
567 | ||
568 | /* Start keyboard reset command. */ | |
569 | raw3270_request_reset(tp->kreset); | |
570 | raw3270_request_set_cmd(tp->kreset, TC_WRITE); | |
571 | raw3270_request_add_data(tp->kreset, &kreset_data, 1); | |
572 | raw3270_start(&tp->view, tp->kreset); | |
573 | ||
ba186e7d JS |
574 | while (len-- > 0) |
575 | kbd_keycode(tp->kbd, *input++); | |
576 | /* Emit keycode for AID byte. */ | |
577 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
1da177e4 LT |
578 | |
579 | raw3270_request_reset(rrq); | |
580 | xchg(&tp->read, rrq); | |
581 | raw3270_put_view(&tp->view); | |
582 | } | |
583 | ||
584 | /* | |
585 | * Read request completion callback. | |
586 | */ | |
587 | static void | |
588 | tty3270_read_callback(struct raw3270_request *rq, void *data) | |
589 | { | |
881e18f9 | 590 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 LT |
591 | raw3270_get_view(rq->view); |
592 | /* Schedule tasklet to pass input to tty. */ | |
881e18f9 | 593 | tasklet_schedule(&tp->readlet); |
1da177e4 LT |
594 | } |
595 | ||
596 | /* | |
597 | * Issue a read request. Call with device lock. | |
598 | */ | |
599 | static void | |
600 | tty3270_issue_read(struct tty3270 *tp, int lock) | |
601 | { | |
602 | struct raw3270_request *rrq; | |
603 | int rc; | |
604 | ||
605 | rrq = xchg(&tp->read, 0); | |
606 | if (!rrq) | |
607 | /* Read already scheduled. */ | |
608 | return; | |
609 | rrq->callback = tty3270_read_callback; | |
610 | rrq->callback_data = tp; | |
611 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
612 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
613 | /* Issue the read modified request. */ | |
614 | if (lock) { | |
615 | rc = raw3270_start(&tp->view, rrq); | |
616 | } else | |
617 | rc = raw3270_start_irq(&tp->view, rrq); | |
618 | if (rc) { | |
619 | raw3270_request_reset(rrq); | |
620 | xchg(&tp->read, rrq); | |
621 | } | |
622 | } | |
623 | ||
624 | /* | |
625 | * Switch to the tty view. | |
626 | */ | |
627 | static int | |
628 | tty3270_activate(struct raw3270_view *view) | |
629 | { | |
881e18f9 | 630 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
1da177e4 | 631 | |
1da177e4 LT |
632 | tp->update_flags = TTY_UPDATE_ALL; |
633 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
634 | return 0; |
635 | } | |
636 | ||
637 | static void | |
638 | tty3270_deactivate(struct raw3270_view *view) | |
639 | { | |
881e18f9 | 640 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
205d7ab9 | 641 | |
205d7ab9 | 642 | del_timer(&tp->timer); |
1da177e4 LT |
643 | } |
644 | ||
645 | static int | |
646 | tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) | |
647 | { | |
648 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
23d805b6 | 649 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
650 | if (!tp->throttle) |
651 | tty3270_issue_read(tp, 0); | |
652 | else | |
653 | tp->attn = 1; | |
654 | } | |
655 | ||
656 | if (rq) { | |
23d805b6 | 657 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
658 | rq->rc = -EIO; |
659 | else | |
660 | /* Normal end. Copy residual count. */ | |
23d805b6 | 661 | rq->rescnt = irb->scsw.cmd.count; |
05bfd70b MS |
662 | } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
663 | /* Interrupt without an outstanding request -> update all */ | |
664 | tp->update_flags = TTY_UPDATE_ALL; | |
665 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
666 | } |
667 | return RAW3270_IO_DONE; | |
668 | } | |
669 | ||
670 | /* | |
671 | * Allocate tty3270 structure. | |
672 | */ | |
673 | static struct tty3270 * | |
674 | tty3270_alloc_view(void) | |
675 | { | |
676 | struct tty3270 *tp; | |
677 | int pages; | |
678 | ||
88abaab4 | 679 | tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
1da177e4 LT |
680 | if (!tp) |
681 | goto out_err; | |
1da177e4 LT |
682 | tp->freemem_pages = |
683 | kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL); | |
684 | if (!tp->freemem_pages) | |
685 | goto out_tp; | |
686 | INIT_LIST_HEAD(&tp->freemem); | |
9d2ae233 JS |
687 | INIT_LIST_HEAD(&tp->lines); |
688 | INIT_LIST_HEAD(&tp->update); | |
689 | INIT_LIST_HEAD(&tp->rcl_lines); | |
690 | tp->rcl_max = 20; | |
9d2ae233 | 691 | |
1da177e4 LT |
692 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { |
693 | tp->freemem_pages[pages] = (void *) | |
694 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
695 | if (!tp->freemem_pages[pages]) | |
696 | goto out_pages; | |
697 | add_string_memory(&tp->freemem, | |
698 | tp->freemem_pages[pages], PAGE_SIZE); | |
699 | } | |
700 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
ed3cb6f0 | 701 | if (IS_ERR(tp->write)) |
1da177e4 LT |
702 | goto out_pages; |
703 | tp->read = raw3270_request_alloc(0); | |
ed3cb6f0 | 704 | if (IS_ERR(tp->read)) |
1da177e4 LT |
705 | goto out_write; |
706 | tp->kreset = raw3270_request_alloc(1); | |
ed3cb6f0 | 707 | if (IS_ERR(tp->kreset)) |
1da177e4 LT |
708 | goto out_read; |
709 | tp->kbd = kbd_alloc(); | |
710 | if (!tp->kbd) | |
711 | goto out_reset; | |
57985d7e MS |
712 | |
713 | tty_port_init(&tp->port); | |
714 | setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update, | |
715 | (unsigned long) tp); | |
716 | tasklet_init(&tp->readlet, | |
717 | (void (*)(unsigned long)) tty3270_read_tasklet, | |
718 | (unsigned long) tp->read); | |
4d334fd1 | 719 | INIT_WORK(&tp->resize_work, tty3270_resize_work); |
57985d7e | 720 | |
1da177e4 LT |
721 | return tp; |
722 | ||
723 | out_reset: | |
724 | raw3270_request_free(tp->kreset); | |
725 | out_read: | |
726 | raw3270_request_free(tp->read); | |
727 | out_write: | |
728 | raw3270_request_free(tp->write); | |
729 | out_pages: | |
730 | while (pages--) | |
731 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
732 | kfree(tp->freemem_pages); | |
191c5f10 | 733 | tty_port_destroy(&tp->port); |
1da177e4 LT |
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); | |
191c5f10 | 755 | tty_port_destroy(&tp->port); |
1da177e4 LT |
756 | kfree(tp); |
757 | } | |
758 | ||
759 | /* | |
760 | * Allocate tty3270 screen. | |
761 | */ | |
4d334fd1 MS |
762 | static struct tty3270_line * |
763 | tty3270_alloc_screen(unsigned int rows, unsigned int cols) | |
1da177e4 | 764 | { |
4d334fd1 | 765 | struct tty3270_line *screen; |
1da177e4 LT |
766 | unsigned long size; |
767 | int lines; | |
768 | ||
4d334fd1 MS |
769 | size = sizeof(struct tty3270_line) * (rows - 2); |
770 | screen = kzalloc(size, GFP_KERNEL); | |
771 | if (!screen) | |
1da177e4 | 772 | goto out_err; |
4d334fd1 MS |
773 | for (lines = 0; lines < rows - 2; lines++) { |
774 | size = sizeof(struct tty3270_cell) * cols; | |
775 | screen[lines].cells = kzalloc(size, GFP_KERNEL); | |
776 | if (!screen[lines].cells) | |
1da177e4 | 777 | goto out_screen; |
1da177e4 | 778 | } |
4d334fd1 | 779 | return screen; |
1da177e4 LT |
780 | out_screen: |
781 | while (lines--) | |
4d334fd1 MS |
782 | kfree(screen[lines].cells); |
783 | kfree(screen); | |
1da177e4 | 784 | out_err: |
4d334fd1 | 785 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
786 | } |
787 | ||
788 | /* | |
789 | * Free tty3270 screen. | |
790 | */ | |
791 | static void | |
4d334fd1 | 792 | tty3270_free_screen(struct tty3270_line *screen, unsigned int rows) |
1da177e4 LT |
793 | { |
794 | int lines; | |
795 | ||
4d334fd1 MS |
796 | for (lines = 0; lines < rows - 2; lines++) |
797 | kfree(screen[lines].cells); | |
798 | kfree(screen); | |
799 | } | |
800 | ||
801 | /* | |
802 | * Resize tty3270 screen | |
803 | */ | |
804 | static void tty3270_resize_work(struct work_struct *work) | |
805 | { | |
806 | struct tty3270 *tp = container_of(work, struct tty3270, resize_work); | |
807 | struct tty3270_line *screen, *oscreen; | |
808 | struct tty_struct *tty; | |
809 | unsigned int orows; | |
810 | struct winsize ws; | |
811 | ||
812 | screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols); | |
8f0ba630 | 813 | if (IS_ERR(screen)) |
4d334fd1 MS |
814 | return; |
815 | /* Switch to new output size */ | |
816 | spin_lock_bh(&tp->view.lock); | |
817 | oscreen = tp->screen; | |
818 | orows = tp->view.rows; | |
819 | tp->view.model = tp->n_model; | |
820 | tp->view.rows = tp->n_rows; | |
821 | tp->view.cols = tp->n_cols; | |
822 | tp->screen = screen; | |
823 | free_string(&tp->freemem, tp->prompt); | |
824 | free_string(&tp->freemem, tp->status); | |
825 | tty3270_create_prompt(tp); | |
826 | tty3270_create_status(tp); | |
827 | tp->nr_up = 0; | |
828 | while (tp->nr_lines < tp->view.rows - 2) | |
829 | tty3270_blank_line(tp); | |
830 | tp->update_flags = TTY_UPDATE_ALL; | |
831 | spin_unlock_bh(&tp->view.lock); | |
832 | tty3270_free_screen(oscreen, orows); | |
833 | tty3270_set_timer(tp, 1); | |
834 | /* Informat tty layer about new size */ | |
835 | tty = tty_port_tty_get(&tp->port); | |
836 | if (!tty) | |
837 | return; | |
838 | ws.ws_row = tp->view.rows - 2; | |
839 | ws.ws_col = tp->view.cols; | |
840 | tty_do_resize(tty, &ws); | |
841 | } | |
842 | ||
843 | static void | |
844 | tty3270_resize(struct raw3270_view *view, int model, int rows, int cols) | |
845 | { | |
846 | struct tty3270 *tp = container_of(view, struct tty3270, view); | |
847 | ||
848 | tp->n_model = model; | |
849 | tp->n_rows = rows; | |
850 | tp->n_cols = cols; | |
851 | schedule_work(&tp->resize_work); | |
1da177e4 LT |
852 | } |
853 | ||
854 | /* | |
855 | * Unlink tty3270 data structure from tty. | |
856 | */ | |
857 | static void | |
858 | tty3270_release(struct raw3270_view *view) | |
859 | { | |
881e18f9 | 860 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
ba186e7d | 861 | struct tty_struct *tty = tty_port_tty_get(&tp->port); |
1da177e4 | 862 | |
1da177e4 | 863 | if (tty) { |
d2c993d8 | 864 | tty->driver_data = NULL; |
ba186e7d | 865 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
866 | tty_hangup(tty); |
867 | raw3270_put_view(&tp->view); | |
ba186e7d | 868 | tty_kref_put(tty); |
1da177e4 LT |
869 | } |
870 | } | |
871 | ||
872 | /* | |
873 | * Free tty3270 data structure | |
874 | */ | |
875 | static void | |
876 | tty3270_free(struct raw3270_view *view) | |
877 | { | |
881e18f9 | 878 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
4d334fd1 | 879 | |
03439e7d | 880 | del_timer_sync(&tp->timer); |
4d334fd1 | 881 | tty3270_free_screen(tp->screen, tp->view.rows); |
881e18f9 | 882 | tty3270_free_view(tp); |
1da177e4 LT |
883 | } |
884 | ||
885 | /* | |
886 | * Delayed freeing of tty3270 views. | |
887 | */ | |
888 | static void | |
889 | tty3270_del_views(void) | |
890 | { | |
1da177e4 LT |
891 | int i; |
892 | ||
c95571e6 MS |
893 | for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) { |
894 | struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i); | |
881e18f9 JS |
895 | if (!IS_ERR(view)) |
896 | raw3270_del_view(view); | |
1da177e4 LT |
897 | } |
898 | } | |
899 | ||
2b67fc46 | 900 | static struct raw3270_fn tty3270_fn = { |
1da177e4 LT |
901 | .activate = tty3270_activate, |
902 | .deactivate = tty3270_deactivate, | |
903 | .intv = (void *) tty3270_irq, | |
904 | .release = tty3270_release, | |
4d334fd1 MS |
905 | .free = tty3270_free, |
906 | .resize = tty3270_resize | |
1da177e4 LT |
907 | }; |
908 | ||
909 | /* | |
20cda6f2 | 910 | * This routine is called whenever a 3270 tty is opened first time. |
1da177e4 | 911 | */ |
20cda6f2 | 912 | static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 | 913 | { |
881e18f9 | 914 | struct raw3270_view *view; |
1da177e4 LT |
915 | struct tty3270 *tp; |
916 | int i, rc; | |
917 | ||
1da177e4 | 918 | /* Check if the tty3270 is already there. */ |
1fcbba3d | 919 | view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR); |
881e18f9 JS |
920 | if (!IS_ERR(view)) { |
921 | tp = container_of(view, struct tty3270, view); | |
1da177e4 LT |
922 | tty->driver_data = tp; |
923 | tty->winsize.ws_row = tp->view.rows - 2; | |
924 | tty->winsize.ws_col = tp->view.cols; | |
d6c53c0e | 925 | tp->port.low_latency = 0; |
ba186e7d JS |
926 | /* why to reassign? */ |
927 | tty_port_tty_set(&tp->port, tty); | |
1da177e4 | 928 | tp->inattr = TF_INPUT; |
20cda6f2 | 929 | return tty_port_install(&tp->port, driver, tty); |
1da177e4 | 930 | } |
1fcbba3d MS |
931 | if (tty3270_max_index < tty->index + 1) |
932 | tty3270_max_index = tty->index + 1; | |
1da177e4 LT |
933 | |
934 | /* Allocate tty3270 structure on first open. */ | |
935 | tp = tty3270_alloc_view(); | |
936 | if (IS_ERR(tp)) | |
937 | return PTR_ERR(tp); | |
938 | ||
1fcbba3d MS |
939 | rc = raw3270_add_view(&tp->view, &tty3270_fn, |
940 | tty->index + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
941 | if (rc) { |
942 | tty3270_free_view(tp); | |
943 | return rc; | |
944 | } | |
945 | ||
36d9f4d3 | 946 | tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols); |
4d334fd1 MS |
947 | if (IS_ERR(tp->screen)) { |
948 | rc = PTR_ERR(tp->screen); | |
1da177e4 | 949 | raw3270_put_view(&tp->view); |
ed3cb6f0 | 950 | raw3270_del_view(&tp->view); |
4d334fd1 | 951 | tty3270_free_view(tp); |
1da177e4 LT |
952 | return rc; |
953 | } | |
954 | ||
ba186e7d | 955 | tty_port_tty_set(&tp->port, tty); |
d6c53c0e | 956 | tp->port.low_latency = 0; |
1da177e4 LT |
957 | tty->winsize.ws_row = tp->view.rows - 2; |
958 | tty->winsize.ws_col = tp->view.cols; | |
959 | ||
960 | tty3270_create_prompt(tp); | |
961 | tty3270_create_status(tp); | |
962 | tty3270_update_status(tp); | |
963 | ||
964 | /* Create blank line for every line in the tty output area. */ | |
965 | for (i = 0; i < tp->view.rows - 2; i++) | |
966 | tty3270_blank_line(tp); | |
967 | ||
ba186e7d | 968 | tp->kbd->port = &tp->port; |
1da177e4 LT |
969 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; |
970 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
971 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
972 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
973 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
974 | ||
975 | raw3270_activate_view(&tp->view); | |
20cda6f2 JS |
976 | |
977 | rc = tty_port_install(&tp->port, driver, tty); | |
978 | if (rc) { | |
979 | raw3270_put_view(&tp->view); | |
980 | return rc; | |
981 | } | |
982 | ||
983 | tty->driver_data = tp; | |
984 | ||
1da177e4 LT |
985 | return 0; |
986 | } | |
987 | ||
736c9fd2 MS |
988 | /* |
989 | * This routine is called whenever a 3270 tty is opened. | |
990 | */ | |
991 | static int | |
992 | tty3270_open(struct tty_struct *tty, struct file *filp) | |
993 | { | |
994 | struct tty3270 *tp = tty->driver_data; | |
995 | struct tty_port *port = &tp->port; | |
996 | ||
997 | port->count++; | |
998 | tty_port_tty_set(port, tty); | |
999 | return 0; | |
1000 | } | |
1001 | ||
1da177e4 LT |
1002 | /* |
1003 | * This routine is called when the 3270 tty is closed. We wait | |
1004 | * for the remaining request to be completed. Then we clean up. | |
1005 | */ | |
1006 | static void | |
1007 | tty3270_close(struct tty_struct *tty, struct file * filp) | |
1008 | { | |
881e18f9 | 1009 | struct tty3270 *tp = tty->driver_data; |
1da177e4 LT |
1010 | |
1011 | if (tty->count > 1) | |
1012 | return; | |
1da177e4 | 1013 | if (tp) { |
d2c993d8 | 1014 | tty->driver_data = NULL; |
ba186e7d | 1015 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
1016 | } |
1017 | } | |
1018 | ||
20cda6f2 JS |
1019 | static void tty3270_cleanup(struct tty_struct *tty) |
1020 | { | |
1021 | struct tty3270 *tp = tty->driver_data; | |
1022 | ||
1023 | if (tp) | |
1024 | raw3270_put_view(&tp->view); | |
1025 | } | |
1026 | ||
1da177e4 LT |
1027 | /* |
1028 | * We always have room. | |
1029 | */ | |
1030 | static int | |
1031 | tty3270_write_room(struct tty_struct *tty) | |
1032 | { | |
1033 | return INT_MAX; | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Insert character into the screen at the current position with the | |
1038 | * current color and highlight. This function does NOT do cursor movement. | |
1039 | */ | |
74c76c84 | 1040 | static void tty3270_put_character(struct tty3270 *tp, char ch) |
1da177e4 LT |
1041 | { |
1042 | struct tty3270_line *line; | |
1043 | struct tty3270_cell *cell; | |
1044 | ||
1045 | line = tp->screen + tp->cy; | |
1046 | if (line->len <= tp->cx) { | |
1047 | while (line->len < tp->cx) { | |
1048 | cell = line->cells + line->len; | |
1049 | cell->character = tp->view.ascebc[' ']; | |
1050 | cell->highlight = tp->highlight; | |
1051 | cell->f_color = tp->f_color; | |
1052 | line->len++; | |
1053 | } | |
1054 | line->len++; | |
1055 | } | |
1056 | cell = line->cells + tp->cx; | |
1057 | cell->character = tp->view.ascebc[(unsigned int) ch]; | |
1058 | cell->highlight = tp->highlight; | |
1059 | cell->f_color = tp->f_color; | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
1064 | */ | |
1065 | static void | |
1066 | tty3270_convert_line(struct tty3270 *tp, int line_nr) | |
1067 | { | |
1068 | struct tty3270_line *line; | |
1069 | struct tty3270_cell *cell; | |
1070 | struct string *s, *n; | |
1071 | unsigned char highlight; | |
1072 | unsigned char f_color; | |
1073 | char *cp; | |
1074 | int flen, i; | |
1075 | ||
1076 | /* Determine how long the fragment will be. */ | |
1077 | flen = 3; /* Prefix (TO_SBA). */ | |
1078 | line = tp->screen + line_nr; | |
1079 | flen += line->len; | |
1080 | highlight = TAX_RESET; | |
1081 | f_color = TAC_RESET; | |
1082 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1083 | if (cell->highlight != highlight) { | |
1084 | flen += 3; /* TO_SA to switch highlight. */ | |
1085 | highlight = cell->highlight; | |
1086 | } | |
1087 | if (cell->f_color != f_color) { | |
1088 | flen += 3; /* TO_SA to switch color. */ | |
1089 | f_color = cell->f_color; | |
1090 | } | |
1091 | } | |
1092 | if (highlight != TAX_RESET) | |
1093 | flen += 3; /* TO_SA to reset hightlight. */ | |
1094 | if (f_color != TAC_RESET) | |
1095 | flen += 3; /* TO_SA to reset color. */ | |
1096 | if (line->len < tp->view.cols) | |
1097 | flen += 4; /* Postfix (TO_RA). */ | |
1098 | ||
1099 | /* Find the line in the list. */ | |
1100 | i = tp->view.rows - 2 - line_nr; | |
1101 | list_for_each_entry_reverse(s, &tp->lines, list) | |
1102 | if (--i <= 0) | |
1103 | break; | |
1104 | /* | |
1105 | * Check if the line needs to get reallocated. | |
1106 | */ | |
1107 | if (s->len != flen) { | |
1108 | /* Reallocate string. */ | |
1109 | n = tty3270_alloc_string(tp, flen); | |
1110 | list_add(&n->list, &s->list); | |
1111 | list_del_init(&s->list); | |
1112 | if (!list_empty(&s->update)) | |
1113 | list_del_init(&s->update); | |
1114 | free_string(&tp->freemem, s); | |
1115 | s = n; | |
1116 | } | |
1117 | ||
1118 | /* Write 3270 data fragment. */ | |
1119 | cp = s->string; | |
1120 | *cp++ = TO_SBA; | |
1121 | *cp++ = 0; | |
1122 | *cp++ = 0; | |
1123 | ||
1124 | highlight = TAX_RESET; | |
1125 | f_color = TAC_RESET; | |
1126 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1127 | if (cell->highlight != highlight) { | |
1128 | *cp++ = TO_SA; | |
1129 | *cp++ = TAT_EXTHI; | |
1130 | *cp++ = cell->highlight; | |
1131 | highlight = cell->highlight; | |
1132 | } | |
1133 | if (cell->f_color != f_color) { | |
1134 | *cp++ = TO_SA; | |
1135 | *cp++ = TAT_COLOR; | |
1136 | *cp++ = cell->f_color; | |
1137 | f_color = cell->f_color; | |
1138 | } | |
1139 | *cp++ = cell->character; | |
1140 | } | |
1141 | if (highlight != TAX_RESET) { | |
1142 | *cp++ = TO_SA; | |
1143 | *cp++ = TAT_EXTHI; | |
1144 | *cp++ = TAX_RESET; | |
1145 | } | |
1146 | if (f_color != TAC_RESET) { | |
1147 | *cp++ = TO_SA; | |
1148 | *cp++ = TAT_COLOR; | |
1149 | *cp++ = TAC_RESET; | |
1150 | } | |
1151 | if (line->len < tp->view.cols) { | |
1152 | *cp++ = TO_RA; | |
1153 | *cp++ = 0; | |
1154 | *cp++ = 0; | |
1155 | *cp++ = 0; | |
1156 | } | |
1157 | ||
1158 | if (tp->nr_up + line_nr < tp->view.rows - 2) { | |
1159 | /* Line is currently visible on screen. */ | |
1160 | tty3270_update_string(tp, s, line_nr); | |
1161 | /* Add line to update list. */ | |
1162 | if (list_empty(&s->update)) { | |
1163 | list_add_tail(&s->update, &tp->update); | |
1164 | tp->update_flags |= TTY_UPDATE_LIST; | |
1165 | } | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * Do carriage return. | |
1171 | */ | |
1172 | static void | |
1173 | tty3270_cr(struct tty3270 *tp) | |
1174 | { | |
1175 | tp->cx = 0; | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Do line feed. | |
1180 | */ | |
1181 | static void | |
1182 | tty3270_lf(struct tty3270 *tp) | |
1183 | { | |
1184 | struct tty3270_line temp; | |
1185 | int i; | |
1186 | ||
1187 | tty3270_convert_line(tp, tp->cy); | |
1188 | if (tp->cy < tp->view.rows - 3) { | |
1189 | tp->cy++; | |
1190 | return; | |
1191 | } | |
1192 | /* Last line just filled up. Add new, blank line. */ | |
1193 | tty3270_blank_line(tp); | |
1194 | temp = tp->screen[0]; | |
1195 | temp.len = 0; | |
1196 | for (i = 0; i < tp->view.rows - 3; i++) | |
1197 | tp->screen[i] = tp->screen[i+1]; | |
1198 | tp->screen[tp->view.rows - 3] = temp; | |
1199 | tty3270_rebuild_update(tp); | |
1200 | } | |
1201 | ||
1202 | static void | |
1203 | tty3270_ri(struct tty3270 *tp) | |
1204 | { | |
1205 | if (tp->cy > 0) { | |
1206 | tty3270_convert_line(tp, tp->cy); | |
1207 | tp->cy--; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * Insert characters at current position. | |
1213 | */ | |
1214 | static void | |
1215 | tty3270_insert_characters(struct tty3270 *tp, int n) | |
1216 | { | |
1217 | struct tty3270_line *line; | |
1218 | int k; | |
1219 | ||
1220 | line = tp->screen + tp->cy; | |
1221 | while (line->len < tp->cx) { | |
1222 | line->cells[line->len].character = tp->view.ascebc[' ']; | |
1223 | line->cells[line->len].highlight = TAX_RESET; | |
1224 | line->cells[line->len].f_color = TAC_RESET; | |
1225 | line->len++; | |
1226 | } | |
1227 | if (n > tp->view.cols - tp->cx) | |
1228 | n = tp->view.cols - tp->cx; | |
1229 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1230 | while (k--) | |
1231 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1232 | line->len += n; | |
1233 | if (line->len > tp->view.cols) | |
1234 | line->len = tp->view.cols; | |
1235 | while (n-- > 0) { | |
1236 | line->cells[tp->cx + n].character = tp->view.ascebc[' ']; | |
1237 | line->cells[tp->cx + n].highlight = tp->highlight; | |
1238 | line->cells[tp->cx + n].f_color = tp->f_color; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * Delete characters at current position. | |
1244 | */ | |
1245 | static void | |
1246 | tty3270_delete_characters(struct tty3270 *tp, int n) | |
1247 | { | |
1248 | struct tty3270_line *line; | |
1249 | int i; | |
1250 | ||
1251 | line = tp->screen + tp->cy; | |
1252 | if (line->len <= tp->cx) | |
1253 | return; | |
1254 | if (line->len - tp->cx <= n) { | |
1255 | line->len = tp->cx; | |
1256 | return; | |
1257 | } | |
1258 | for (i = tp->cx; i + n < line->len; i++) | |
1259 | line->cells[i] = line->cells[i + n]; | |
1260 | line->len -= n; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * Erase characters at current position. | |
1265 | */ | |
1266 | static void | |
1267 | tty3270_erase_characters(struct tty3270 *tp, int n) | |
1268 | { | |
1269 | struct tty3270_line *line; | |
1270 | struct tty3270_cell *cell; | |
1271 | ||
1272 | line = tp->screen + tp->cy; | |
1273 | while (line->len > tp->cx && n-- > 0) { | |
1274 | cell = line->cells + tp->cx++; | |
1275 | cell->character = ' '; | |
1276 | cell->highlight = TAX_RESET; | |
1277 | cell->f_color = TAC_RESET; | |
1278 | } | |
1279 | tp->cx += n; | |
1280 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Erase line, 3 different cases: | |
1285 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1286 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1287 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1288 | */ | |
1289 | static void | |
1290 | tty3270_erase_line(struct tty3270 *tp, int mode) | |
1291 | { | |
1292 | struct tty3270_line *line; | |
1293 | struct tty3270_cell *cell; | |
1294 | int i; | |
1295 | ||
1296 | line = tp->screen + tp->cy; | |
1297 | if (mode == 0) | |
1298 | line->len = tp->cx; | |
1299 | else if (mode == 1) { | |
1300 | for (i = 0; i < tp->cx; i++) { | |
1301 | cell = line->cells + i; | |
1302 | cell->character = ' '; | |
1303 | cell->highlight = TAX_RESET; | |
1304 | cell->f_color = TAC_RESET; | |
1305 | } | |
1306 | if (line->len <= tp->cx) | |
1307 | line->len = tp->cx + 1; | |
1308 | } else if (mode == 2) | |
1309 | line->len = 0; | |
1310 | tty3270_convert_line(tp, tp->cy); | |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * Erase display, 3 different cases: | |
1315 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1316 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1317 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1318 | */ | |
1319 | static void | |
1320 | tty3270_erase_display(struct tty3270 *tp, int mode) | |
1321 | { | |
1322 | int i; | |
1323 | ||
1324 | if (mode == 0) { | |
1325 | tty3270_erase_line(tp, 0); | |
1326 | for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { | |
1327 | tp->screen[i].len = 0; | |
1328 | tty3270_convert_line(tp, i); | |
1329 | } | |
1330 | } else if (mode == 1) { | |
1331 | for (i = 0; i < tp->cy; i++) { | |
1332 | tp->screen[i].len = 0; | |
1333 | tty3270_convert_line(tp, i); | |
1334 | } | |
1335 | tty3270_erase_line(tp, 1); | |
1336 | } else if (mode == 2) { | |
1337 | for (i = 0; i < tp->view.rows - 2; i++) { | |
1338 | tp->screen[i].len = 0; | |
1339 | tty3270_convert_line(tp, i); | |
1340 | } | |
1341 | } | |
1342 | tty3270_rebuild_update(tp); | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Set attributes found in an escape sequence. | |
1347 | * Esc [ <attr> ; <attr> ; ... m | |
1348 | */ | |
1349 | static void | |
1350 | tty3270_set_attributes(struct tty3270 *tp) | |
1351 | { | |
1352 | static unsigned char f_colors[] = { | |
1353 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, | |
1354 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1355 | }; | |
1356 | int i, attr; | |
1357 | ||
1358 | for (i = 0; i <= tp->esc_npar; i++) { | |
1359 | attr = tp->esc_par[i]; | |
1360 | switch (attr) { | |
1361 | case 0: /* Reset */ | |
1362 | tp->highlight = TAX_RESET; | |
1363 | tp->f_color = TAC_RESET; | |
1364 | break; | |
1365 | /* Highlight. */ | |
1366 | case 4: /* Start underlining. */ | |
1367 | tp->highlight = TAX_UNDER; | |
1368 | break; | |
1369 | case 5: /* Start blink. */ | |
1370 | tp->highlight = TAX_BLINK; | |
1371 | break; | |
1372 | case 7: /* Start reverse. */ | |
1373 | tp->highlight = TAX_REVER; | |
1374 | break; | |
1375 | case 24: /* End underlining */ | |
1376 | if (tp->highlight == TAX_UNDER) | |
1377 | tp->highlight = TAX_RESET; | |
1378 | break; | |
1379 | case 25: /* End blink. */ | |
1380 | if (tp->highlight == TAX_BLINK) | |
1381 | tp->highlight = TAX_RESET; | |
1382 | break; | |
1383 | case 27: /* End reverse. */ | |
1384 | if (tp->highlight == TAX_REVER) | |
1385 | tp->highlight = TAX_RESET; | |
1386 | break; | |
1387 | /* Foreground color. */ | |
1388 | case 30: /* Black */ | |
1389 | case 31: /* Red */ | |
1390 | case 32: /* Green */ | |
1391 | case 33: /* Yellow */ | |
1392 | case 34: /* Blue */ | |
1393 | case 35: /* Magenta */ | |
1394 | case 36: /* Cyan */ | |
1395 | case 37: /* White */ | |
1396 | case 39: /* Black */ | |
1397 | tp->f_color = f_colors[attr - 30]; | |
1398 | break; | |
1399 | } | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | static inline int | |
1404 | tty3270_getpar(struct tty3270 *tp, int ix) | |
1405 | { | |
1406 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1407 | } | |
1408 | ||
1409 | static void | |
1410 | tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) | |
1411 | { | |
364c8558 HC |
1412 | int max_cx = max(0, cx); |
1413 | int max_cy = max(0, cy); | |
1414 | ||
1415 | tp->cx = min_t(int, tp->view.cols - 1, max_cx); | |
1416 | cy = min_t(int, tp->view.rows - 3, max_cy); | |
1da177e4 LT |
1417 | if (cy != tp->cy) { |
1418 | tty3270_convert_line(tp, tp->cy); | |
1419 | tp->cy = cy; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * Process escape sequences. Known sequences: | |
1425 | * Esc 7 Save Cursor Position | |
1426 | * Esc 8 Restore Cursor Position | |
1427 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1428 | * Esc [ Pn ; Pn H Cursor Position | |
1429 | * Esc [ Pn ; Pn f Cursor Position | |
1430 | * Esc [ Pn A Cursor Up | |
1431 | * Esc [ Pn B Cursor Down | |
1432 | * Esc [ Pn C Cursor Forward | |
1433 | * Esc [ Pn D Cursor Backward | |
1434 | * Esc [ Pn G Cursor Horizontal Absolute | |
1435 | * Esc [ Pn X Erase Characters | |
1436 | * Esc [ Ps J Erase in Display | |
1437 | * Esc [ Ps K Erase in Line | |
1438 | * // FIXME: add all the new ones. | |
1439 | * | |
1440 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1441 | * Ps is a selective parameter. | |
1442 | */ | |
1443 | static void | |
1444 | tty3270_escape_sequence(struct tty3270 *tp, char ch) | |
1445 | { | |
1446 | enum { ESnormal, ESesc, ESsquare, ESgetpars }; | |
1447 | ||
1448 | if (tp->esc_state == ESnormal) { | |
1449 | if (ch == 0x1b) | |
1450 | /* Starting new escape sequence. */ | |
1451 | tp->esc_state = ESesc; | |
1452 | return; | |
1453 | } | |
1454 | if (tp->esc_state == ESesc) { | |
1455 | tp->esc_state = ESnormal; | |
1456 | switch (ch) { | |
1457 | case '[': | |
1458 | tp->esc_state = ESsquare; | |
1459 | break; | |
1460 | case 'E': | |
1461 | tty3270_cr(tp); | |
1462 | tty3270_lf(tp); | |
1463 | break; | |
1464 | case 'M': | |
1465 | tty3270_ri(tp); | |
1466 | break; | |
1467 | case 'D': | |
1468 | tty3270_lf(tp); | |
1469 | break; | |
1470 | case 'Z': /* Respond ID. */ | |
ba186e7d | 1471 | kbd_puts_queue(&tp->port, "\033[?6c"); |
1da177e4 LT |
1472 | break; |
1473 | case '7': /* Save cursor position. */ | |
1474 | tp->saved_cx = tp->cx; | |
1475 | tp->saved_cy = tp->cy; | |
1476 | tp->saved_highlight = tp->highlight; | |
1477 | tp->saved_f_color = tp->f_color; | |
1478 | break; | |
1479 | case '8': /* Restore cursor position. */ | |
1480 | tty3270_convert_line(tp, tp->cy); | |
1481 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1482 | tp->highlight = tp->saved_highlight; | |
1483 | tp->f_color = tp->saved_f_color; | |
1484 | break; | |
1485 | case 'c': /* Reset terminal. */ | |
1486 | tp->cx = tp->saved_cx = 0; | |
1487 | tp->cy = tp->saved_cy = 0; | |
1488 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1489 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1490 | tty3270_erase_display(tp, 2); | |
1491 | break; | |
1492 | } | |
1493 | return; | |
1494 | } | |
1495 | if (tp->esc_state == ESsquare) { | |
1496 | tp->esc_state = ESgetpars; | |
1497 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1498 | tp->esc_npar = 0; | |
1499 | tp->esc_ques = (ch == '?'); | |
1500 | if (tp->esc_ques) | |
1501 | return; | |
1502 | } | |
1503 | if (tp->esc_state == ESgetpars) { | |
1504 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { | |
1505 | tp->esc_npar++; | |
1506 | return; | |
1507 | } | |
1508 | if (ch >= '0' && ch <= '9') { | |
1509 | tp->esc_par[tp->esc_npar] *= 10; | |
1510 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1511 | return; | |
1512 | } | |
1513 | } | |
1514 | tp->esc_state = ESnormal; | |
1515 | if (ch == 'n' && !tp->esc_ques) { | |
1516 | if (tp->esc_par[0] == 5) /* Status report. */ | |
ba186e7d | 1517 | kbd_puts_queue(&tp->port, "\033[0n"); |
1da177e4 LT |
1518 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ |
1519 | char buf[40]; | |
1520 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
ba186e7d | 1521 | kbd_puts_queue(&tp->port, buf); |
1da177e4 LT |
1522 | } |
1523 | return; | |
1524 | } | |
1525 | if (tp->esc_ques) | |
1526 | return; | |
1527 | switch (ch) { | |
1528 | case 'm': | |
1529 | tty3270_set_attributes(tp); | |
1530 | break; | |
1531 | case 'H': /* Set cursor position. */ | |
1532 | case 'f': | |
1533 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1534 | tty3270_getpar(tp, 0) - 1); | |
1535 | break; | |
1536 | case 'd': /* Set y position. */ | |
1537 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1538 | break; | |
1539 | case 'A': /* Cursor up. */ | |
1540 | case 'F': | |
1541 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1542 | break; | |
1543 | case 'B': /* Cursor down. */ | |
1544 | case 'e': | |
1545 | case 'E': | |
1546 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1547 | break; | |
1548 | case 'C': /* Cursor forward. */ | |
1549 | case 'a': | |
1550 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1551 | break; | |
1552 | case 'D': /* Cursor backward. */ | |
1553 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1554 | break; | |
1555 | case 'G': /* Set x position. */ | |
1556 | case '`': | |
1557 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1558 | break; | |
1559 | case 'X': /* Erase Characters. */ | |
1560 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1561 | break; | |
1562 | case 'J': /* Erase display. */ | |
1563 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1564 | break; | |
1565 | case 'K': /* Erase line. */ | |
1566 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1567 | break; | |
1568 | case 'P': /* Delete characters. */ | |
1569 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1570 | break; | |
1571 | case '@': /* Insert characters. */ | |
1572 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1573 | break; | |
1574 | case 's': /* Save cursor position. */ | |
1575 | tp->saved_cx = tp->cx; | |
1576 | tp->saved_cy = tp->cy; | |
1577 | tp->saved_highlight = tp->highlight; | |
1578 | tp->saved_f_color = tp->f_color; | |
1579 | break; | |
1580 | case 'u': /* Restore cursor position. */ | |
1581 | tty3270_convert_line(tp, tp->cy); | |
1582 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1583 | tp->highlight = tp->saved_highlight; | |
1584 | tp->f_color = tp->saved_f_color; | |
1585 | break; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * String write routine for 3270 ttys | |
1591 | */ | |
1592 | static void | |
20acdfa8 JS |
1593 | tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty, |
1594 | const unsigned char *buf, int count) | |
1da177e4 LT |
1595 | { |
1596 | int i_msg, i; | |
1597 | ||
1598 | spin_lock_bh(&tp->view.lock); | |
20acdfa8 | 1599 | for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) { |
1da177e4 LT |
1600 | if (tp->esc_state != 0) { |
1601 | /* Continue escape sequence. */ | |
1602 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1603 | continue; | |
1604 | } | |
1605 | ||
1606 | switch (buf[i_msg]) { | |
1607 | case 0x07: /* '\a' -- Alarm */ | |
1608 | tp->wcc |= TW_PLUSALARM; | |
1609 | break; | |
1610 | case 0x08: /* Backspace. */ | |
1611 | if (tp->cx > 0) { | |
1612 | tp->cx--; | |
1613 | tty3270_put_character(tp, ' '); | |
1614 | } | |
1615 | break; | |
1616 | case 0x09: /* '\t' -- Tabulate */ | |
1617 | for (i = tp->cx % 8; i < 8; i++) { | |
1618 | if (tp->cx >= tp->view.cols) { | |
1619 | tty3270_cr(tp); | |
1620 | tty3270_lf(tp); | |
1621 | break; | |
1622 | } | |
1623 | tty3270_put_character(tp, ' '); | |
1624 | tp->cx++; | |
1625 | } | |
1626 | break; | |
1627 | case 0x0a: /* '\n' -- New Line */ | |
1628 | tty3270_cr(tp); | |
1629 | tty3270_lf(tp); | |
1630 | break; | |
1631 | case 0x0c: /* '\f' -- Form Feed */ | |
1632 | tty3270_erase_display(tp, 2); | |
1633 | tp->cx = tp->cy = 0; | |
1634 | break; | |
1635 | case 0x0d: /* '\r' -- Carriage Return */ | |
1636 | tp->cx = 0; | |
1637 | break; | |
1638 | case 0x0f: /* SuSE "exit alternate mode" */ | |
1639 | break; | |
1640 | case 0x1b: /* Start escape sequence. */ | |
1641 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1642 | break; | |
1643 | default: /* Insert normal character. */ | |
1644 | if (tp->cx >= tp->view.cols) { | |
1645 | tty3270_cr(tp); | |
1646 | tty3270_lf(tp); | |
1647 | } | |
1648 | tty3270_put_character(tp, buf[i_msg]); | |
1649 | tp->cx++; | |
1650 | break; | |
1651 | } | |
1652 | } | |
1653 | /* Convert current line to 3270 data fragment. */ | |
1654 | tty3270_convert_line(tp, tp->cy); | |
1655 | ||
1656 | /* Setup timer to update display after 1/10 second */ | |
1657 | if (!timer_pending(&tp->timer)) | |
1658 | tty3270_set_timer(tp, HZ/10); | |
1659 | ||
1660 | spin_unlock_bh(&tp->view.lock); | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * String write routine for 3270 ttys | |
1665 | */ | |
1666 | static int | |
1667 | tty3270_write(struct tty_struct * tty, | |
1668 | const unsigned char *buf, int count) | |
1669 | { | |
1670 | struct tty3270 *tp; | |
1671 | ||
1672 | tp = tty->driver_data; | |
1673 | if (!tp) | |
1674 | return 0; | |
1675 | if (tp->char_count > 0) { | |
20acdfa8 | 1676 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1677 | tp->char_count = 0; |
1678 | } | |
20acdfa8 | 1679 | tty3270_do_write(tp, tty, buf, count); |
1da177e4 LT |
1680 | return count; |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * Put single characters to the ttys character buffer | |
1685 | */ | |
74c76c84 | 1686 | static int tty3270_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1687 | { |
1688 | struct tty3270 *tp; | |
1689 | ||
1690 | tp = tty->driver_data; | |
74c76c84 HC |
1691 | if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE) |
1692 | return 0; | |
1693 | tp->char_buf[tp->char_count++] = ch; | |
1694 | return 1; | |
1da177e4 LT |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * Flush all characters from the ttys characeter buffer put there | |
1699 | * by tty3270_put_char. | |
1700 | */ | |
1701 | static void | |
1702 | tty3270_flush_chars(struct tty_struct *tty) | |
1703 | { | |
1704 | struct tty3270 *tp; | |
1705 | ||
1706 | tp = tty->driver_data; | |
1707 | if (!tp) | |
1708 | return; | |
1709 | if (tp->char_count > 0) { | |
20acdfa8 | 1710 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1711 | tp->char_count = 0; |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Returns the number of characters in the output buffer. This is | |
1717 | * used in tty_wait_until_sent to wait until all characters have | |
1718 | * appeared on the screen. | |
1719 | */ | |
1720 | static int | |
1721 | tty3270_chars_in_buffer(struct tty_struct *tty) | |
1722 | { | |
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | static void | |
1727 | tty3270_flush_buffer(struct tty_struct *tty) | |
1728 | { | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * Check for visible/invisible input switches | |
1733 | */ | |
1734 | static void | |
606d099c | 1735 | tty3270_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 LT |
1736 | { |
1737 | struct tty3270 *tp; | |
1738 | int new; | |
1739 | ||
1740 | tp = tty->driver_data; | |
1741 | if (!tp) | |
1742 | return; | |
1743 | spin_lock_bh(&tp->view.lock); | |
1744 | if (L_ICANON(tty)) { | |
1745 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1746 | if (new != tp->inattr) { | |
1747 | tp->inattr = new; | |
d2c993d8 | 1748 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
1749 | tty3270_set_timer(tp, 1); |
1750 | } | |
1751 | } | |
1752 | spin_unlock_bh(&tp->view.lock); | |
1753 | } | |
1754 | ||
1755 | /* | |
1756 | * Disable reading from a 3270 tty | |
1757 | */ | |
1758 | static void | |
1759 | tty3270_throttle(struct tty_struct * tty) | |
1760 | { | |
1761 | struct tty3270 *tp; | |
1762 | ||
1763 | tp = tty->driver_data; | |
1764 | if (!tp) | |
1765 | return; | |
1766 | tp->throttle = 1; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Enable reading from a 3270 tty | |
1771 | */ | |
1772 | static void | |
1773 | tty3270_unthrottle(struct tty_struct * tty) | |
1774 | { | |
1775 | struct tty3270 *tp; | |
1776 | ||
1777 | tp = tty->driver_data; | |
1778 | if (!tp) | |
1779 | return; | |
1780 | tp->throttle = 0; | |
1781 | if (tp->attn) | |
1782 | tty3270_issue_read(tp, 1); | |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * Hang up the tty device. | |
1787 | */ | |
1788 | static void | |
1789 | tty3270_hangup(struct tty_struct *tty) | |
1790 | { | |
1791 | // FIXME: implement | |
1792 | } | |
1793 | ||
1794 | static void | |
1795 | tty3270_wait_until_sent(struct tty_struct *tty, int timeout) | |
1796 | { | |
1797 | } | |
1798 | ||
65c56e07 HC |
1799 | static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd, |
1800 | unsigned long arg) | |
1da177e4 LT |
1801 | { |
1802 | struct tty3270 *tp; | |
1803 | ||
1804 | tp = tty->driver_data; | |
1805 | if (!tp) | |
1806 | return -ENODEV; | |
1807 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1808 | return -EIO; | |
65c56e07 | 1809 | return kbd_ioctl(tp->kbd, cmd, arg); |
1da177e4 LT |
1810 | } |
1811 | ||
9d4bfd41 | 1812 | #ifdef CONFIG_COMPAT |
65c56e07 HC |
1813 | static long tty3270_compat_ioctl(struct tty_struct *tty, |
1814 | unsigned int cmd, unsigned long arg) | |
9d4bfd41 AB |
1815 | { |
1816 | struct tty3270 *tp; | |
1817 | ||
1818 | tp = tty->driver_data; | |
1819 | if (!tp) | |
1820 | return -ENODEV; | |
1821 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1822 | return -EIO; | |
65c56e07 | 1823 | return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg)); |
9d4bfd41 AB |
1824 | } |
1825 | #endif | |
1826 | ||
b68e31d0 | 1827 | static const struct tty_operations tty3270_ops = { |
20cda6f2 JS |
1828 | .install = tty3270_install, |
1829 | .cleanup = tty3270_cleanup, | |
736c9fd2 | 1830 | .open = tty3270_open, |
1da177e4 LT |
1831 | .close = tty3270_close, |
1832 | .write = tty3270_write, | |
1833 | .put_char = tty3270_put_char, | |
1834 | .flush_chars = tty3270_flush_chars, | |
1835 | .write_room = tty3270_write_room, | |
1836 | .chars_in_buffer = tty3270_chars_in_buffer, | |
1837 | .flush_buffer = tty3270_flush_buffer, | |
1838 | .throttle = tty3270_throttle, | |
1839 | .unthrottle = tty3270_unthrottle, | |
1840 | .hangup = tty3270_hangup, | |
1841 | .wait_until_sent = tty3270_wait_until_sent, | |
1842 | .ioctl = tty3270_ioctl, | |
9d4bfd41 AB |
1843 | #ifdef CONFIG_COMPAT |
1844 | .compat_ioctl = tty3270_compat_ioctl, | |
1845 | #endif | |
1da177e4 LT |
1846 | .set_termios = tty3270_set_termios |
1847 | }; | |
1848 | ||
63df41d6 | 1849 | static void tty3270_create_cb(int minor) |
c95571e6 | 1850 | { |
1fcbba3d | 1851 | tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL); |
c95571e6 MS |
1852 | } |
1853 | ||
63df41d6 | 1854 | static void tty3270_destroy_cb(int minor) |
c95571e6 | 1855 | { |
1fcbba3d | 1856 | tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR); |
c95571e6 MS |
1857 | } |
1858 | ||
63df41d6 | 1859 | static struct raw3270_notifier tty3270_notifier = |
c95571e6 MS |
1860 | { |
1861 | .create = tty3270_create_cb, | |
1862 | .destroy = tty3270_destroy_cb, | |
1863 | }; | |
1864 | ||
1da177e4 LT |
1865 | /* |
1866 | * 3270 tty registration code called from tty_init(). | |
1867 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1868 | */ | |
2b67fc46 | 1869 | static int __init tty3270_init(void) |
1da177e4 LT |
1870 | { |
1871 | struct tty_driver *driver; | |
1872 | int ret; | |
1873 | ||
c95571e6 MS |
1874 | driver = tty_alloc_driver(RAW3270_MAXDEVS, |
1875 | TTY_DRIVER_REAL_RAW | | |
1876 | TTY_DRIVER_DYNAMIC_DEV | | |
1877 | TTY_DRIVER_RESET_TERMIOS); | |
1878 | if (IS_ERR(driver)) | |
1879 | return PTR_ERR(driver); | |
1da177e4 LT |
1880 | |
1881 | /* | |
1882 | * Initialize the tty_driver structure | |
1883 | * Entries in tty3270_driver that are NOT initialized: | |
1884 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1885 | */ | |
c95571e6 MS |
1886 | driver->driver_name = "tty3270"; |
1887 | driver->name = "3270/tty"; | |
1da177e4 | 1888 | driver->major = IBM_TTY3270_MAJOR; |
1fcbba3d MS |
1889 | driver->minor_start = RAW3270_FIRSTMINOR; |
1890 | driver->name_base = RAW3270_FIRSTMINOR; | |
1da177e4 LT |
1891 | driver->type = TTY_DRIVER_TYPE_SYSTEM; |
1892 | driver->subtype = SYSTEM_TYPE_TTY; | |
1893 | driver->init_termios = tty_std_termios; | |
1da177e4 LT |
1894 | tty_set_operations(driver, &tty3270_ops); |
1895 | ret = tty_register_driver(driver); | |
1896 | if (ret) { | |
1da177e4 LT |
1897 | put_tty_driver(driver); |
1898 | return ret; | |
1899 | } | |
1900 | tty3270_driver = driver; | |
c95571e6 | 1901 | raw3270_register_notifier(&tty3270_notifier); |
1da177e4 LT |
1902 | return 0; |
1903 | } | |
1904 | ||
1905 | static void __exit | |
1906 | tty3270_exit(void) | |
1907 | { | |
1908 | struct tty_driver *driver; | |
1909 | ||
c95571e6 | 1910 | raw3270_unregister_notifier(&tty3270_notifier); |
1da177e4 | 1911 | driver = tty3270_driver; |
d2c993d8 | 1912 | tty3270_driver = NULL; |
1da177e4 | 1913 | tty_unregister_driver(driver); |
2312e4f3 | 1914 | put_tty_driver(driver); |
1da177e4 LT |
1915 | tty3270_del_views(); |
1916 | } | |
1917 | ||
1918 | MODULE_LICENSE("GPL"); | |
1919 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
1920 | ||
1921 | module_init(tty3270_init); | |
1922 | module_exit(tty3270_exit); |