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> | |
18 | ||
19 | #include <linux/slab.h> | |
20 | #include <linux/bootmem.h> | |
9d4bfd41 | 21 | #include <linux/compat.h> |
1da177e4 LT |
22 | |
23 | #include <asm/ccwdev.h> | |
24 | #include <asm/cio.h> | |
25 | #include <asm/ebcdic.h> | |
26 | #include <asm/uaccess.h> | |
27 | ||
1da177e4 | 28 | #include "raw3270.h" |
364c8558 | 29 | #include "tty3270.h" |
1da177e4 LT |
30 | #include "keyboard.h" |
31 | ||
32 | #define TTY3270_CHAR_BUF_SIZE 256 | |
33 | #define TTY3270_OUTPUT_BUFFER_SIZE 1024 | |
34 | #define TTY3270_STRING_PAGES 5 | |
35 | ||
36 | struct tty_driver *tty3270_driver; | |
37 | static int tty3270_max_index; | |
38 | ||
2b67fc46 | 39 | static struct raw3270_fn tty3270_fn; |
1da177e4 LT |
40 | |
41 | struct tty3270_cell { | |
42 | unsigned char character; | |
43 | unsigned char highlight; | |
44 | unsigned char f_color; | |
45 | }; | |
46 | ||
47 | struct tty3270_line { | |
48 | struct tty3270_cell *cells; | |
49 | int len; | |
50 | }; | |
51 | ||
52 | #define ESCAPE_NPAR 8 | |
53 | ||
54 | /* | |
55 | * The main tty view data structure. | |
56 | * FIXME: | |
57 | * 1) describe line orientation & lines list concept against screen | |
58 | * 2) describe conversion of screen to lines | |
59 | * 3) describe line format. | |
60 | */ | |
61 | struct tty3270 { | |
62 | struct raw3270_view view; | |
ba186e7d | 63 | struct tty_port port; |
1da177e4 LT |
64 | void **freemem_pages; /* Array of pages used for freemem. */ |
65 | struct list_head freemem; /* List of free memory for strings. */ | |
66 | ||
67 | /* Output stuff. */ | |
68 | struct list_head lines; /* List of lines. */ | |
69 | struct list_head update; /* List of lines to update. */ | |
70 | unsigned char wcc; /* Write control character. */ | |
71 | int nr_lines; /* # lines in list. */ | |
72 | int nr_up; /* # lines up in history. */ | |
73 | unsigned long update_flags; /* Update indication bits. */ | |
74 | struct string *status; /* Lower right of display. */ | |
75 | struct raw3270_request *write; /* Single write request. */ | |
76 | struct timer_list timer; /* Output delay timer. */ | |
77 | ||
78 | /* Current tty screen. */ | |
79 | unsigned int cx, cy; /* Current output position. */ | |
80 | unsigned int highlight; /* Blink/reverse/underscore */ | |
81 | unsigned int f_color; /* Foreground color */ | |
82 | struct tty3270_line *screen; | |
83 | ||
84 | /* Input stuff. */ | |
85 | struct string *prompt; /* Output string for input area. */ | |
86 | struct string *input; /* Input string for read request. */ | |
87 | struct raw3270_request *read; /* Single read request. */ | |
88 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
89 | unsigned char inattr; /* Visible/invisible input. */ | |
90 | int throttle, attn; /* tty throttle/unthrottle. */ | |
91 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
92 | struct kbd_data *kbd; /* key_maps stuff. */ | |
93 | ||
94 | /* Escape sequence parsing. */ | |
95 | int esc_state, esc_ques, esc_npar; | |
96 | int esc_par[ESCAPE_NPAR]; | |
97 | unsigned int saved_cx, saved_cy; | |
98 | unsigned int saved_highlight, saved_f_color; | |
99 | ||
100 | /* Command recalling. */ | |
101 | struct list_head rcl_lines; /* List of recallable lines. */ | |
102 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
103 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
104 | ||
105 | /* Character array for put_char/flush_chars. */ | |
106 | unsigned int char_count; | |
107 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
108 | }; | |
109 | ||
110 | /* tty3270->update_flags. See tty3270_update for details. */ | |
111 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
112 | #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
113 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ | |
114 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
205d7ab9 | 115 | #define TTY_UPDATE_ALL 16 /* Recreate screen. */ |
1da177e4 LT |
116 | |
117 | static void tty3270_update(struct tty3270 *); | |
118 | ||
119 | /* | |
120 | * Setup timeout for a device. On timeout trigger an update. | |
121 | */ | |
2b67fc46 | 122 | static void tty3270_set_timer(struct tty3270 *tp, int expires) |
1da177e4 | 123 | { |
205d7ab9 MS |
124 | if (expires == 0) |
125 | del_timer(&tp->timer); | |
126 | else | |
127 | mod_timer(&tp->timer, jiffies + expires); | |
1da177e4 LT |
128 | } |
129 | ||
130 | /* | |
131 | * The input line are the two last lines of the screen. | |
132 | */ | |
133 | static void | |
134 | tty3270_update_prompt(struct tty3270 *tp, char *input, int count) | |
135 | { | |
136 | struct string *line; | |
137 | unsigned int off; | |
138 | ||
139 | line = tp->prompt; | |
140 | if (count != 0) | |
141 | line->string[5] = TF_INMDT; | |
142 | else | |
143 | line->string[5] = tp->inattr; | |
144 | if (count > tp->view.cols * 2 - 11) | |
145 | count = tp->view.cols * 2 - 11; | |
146 | memcpy(line->string + 6, input, count); | |
147 | line->string[6 + count] = TO_IC; | |
148 | /* Clear to end of input line. */ | |
149 | if (count < tp->view.cols * 2 - 11) { | |
150 | line->string[7 + count] = TO_RA; | |
151 | line->string[10 + count] = 0; | |
152 | off = tp->view.cols * tp->view.rows - 9; | |
153 | raw3270_buffer_address(tp->view.dev, line->string+count+8, off); | |
154 | line->len = 11 + count; | |
155 | } else | |
156 | line->len = 7 + count; | |
157 | tp->update_flags |= TTY_UPDATE_INPUT; | |
158 | } | |
159 | ||
160 | static void | |
161 | tty3270_create_prompt(struct tty3270 *tp) | |
162 | { | |
163 | static const unsigned char blueprint[] = | |
164 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
165 | /* empty input string */ | |
166 | TO_IC, TO_RA, 0, 0, 0 }; | |
167 | struct string *line; | |
168 | unsigned int offset; | |
169 | ||
170 | line = alloc_string(&tp->freemem, | |
171 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
172 | tp->prompt = line; | |
173 | tp->inattr = TF_INPUT; | |
174 | /* Copy blueprint to status line */ | |
175 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
176 | line->len = sizeof(blueprint); | |
177 | /* Set output offsets. */ | |
178 | offset = tp->view.cols * (tp->view.rows - 2); | |
179 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
180 | offset = tp->view.cols * tp->view.rows - 9; | |
181 | raw3270_buffer_address(tp->view.dev, line->string + 8, offset); | |
182 | ||
183 | /* Allocate input string for reading. */ | |
184 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
185 | } | |
186 | ||
187 | /* | |
188 | * The status line is the last line of the screen. It shows the string | |
189 | * "Running"/"Holding" in the lower right corner of the screen. | |
190 | */ | |
191 | static void | |
192 | tty3270_update_status(struct tty3270 * tp) | |
193 | { | |
194 | char *str; | |
195 | ||
196 | str = (tp->nr_up != 0) ? "History" : "Running"; | |
197 | memcpy(tp->status->string + 8, str, 7); | |
198 | codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); | |
199 | tp->update_flags |= TTY_UPDATE_STATUS; | |
200 | } | |
201 | ||
202 | static void | |
203 | tty3270_create_status(struct tty3270 * tp) | |
204 | { | |
205 | static const unsigned char blueprint[] = | |
206 | { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, | |
207 | 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, | |
208 | TAC_RESET }; | |
209 | struct string *line; | |
210 | unsigned int offset; | |
211 | ||
212 | line = alloc_string(&tp->freemem,sizeof(blueprint)); | |
213 | tp->status = line; | |
214 | /* Copy blueprint to status line */ | |
215 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
216 | /* Set address to start of status string (= last 9 characters). */ | |
217 | offset = tp->view.cols * tp->view.rows - 9; | |
218 | raw3270_buffer_address(tp->view.dev, line->string + 1, offset); | |
219 | } | |
220 | ||
221 | /* | |
222 | * Set output offsets to 3270 datastream fragment of a tty string. | |
223 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
224 | */ | |
225 | static void | |
226 | tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) | |
227 | { | |
228 | unsigned char *cp; | |
229 | ||
230 | raw3270_buffer_address(tp->view.dev, line->string + 1, | |
231 | tp->view.cols * nr); | |
232 | cp = line->string + line->len - 4; | |
233 | if (*cp == TO_RA) | |
234 | raw3270_buffer_address(tp->view.dev, cp + 1, | |
235 | tp->view.cols * (nr + 1)); | |
236 | } | |
237 | ||
238 | /* | |
239 | * Rebuild update list to print all lines. | |
240 | */ | |
241 | static void | |
242 | tty3270_rebuild_update(struct tty3270 *tp) | |
243 | { | |
244 | struct string *s, *n; | |
245 | int line, nr_up; | |
246 | ||
247 | /* | |
248 | * Throw away update list and create a new one, | |
249 | * containing all lines that will fit on the screen. | |
250 | */ | |
251 | list_for_each_entry_safe(s, n, &tp->update, update) | |
252 | list_del_init(&s->update); | |
253 | line = tp->view.rows - 3; | |
254 | nr_up = tp->nr_up; | |
255 | list_for_each_entry_reverse(s, &tp->lines, list) { | |
256 | if (nr_up > 0) { | |
257 | nr_up--; | |
258 | continue; | |
259 | } | |
260 | tty3270_update_string(tp, s, line); | |
261 | list_add(&s->update, &tp->update); | |
262 | if (--line < 0) | |
263 | break; | |
264 | } | |
265 | tp->update_flags |= TTY_UPDATE_LIST; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Alloc string for size bytes. If there is not enough room in | |
270 | * freemem, free strings until there is room. | |
271 | */ | |
272 | static struct string * | |
273 | tty3270_alloc_string(struct tty3270 *tp, size_t size) | |
274 | { | |
275 | struct string *s, *n; | |
276 | ||
277 | s = alloc_string(&tp->freemem, size); | |
278 | if (s) | |
279 | return s; | |
280 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
281 | BUG_ON(tp->nr_lines <= tp->view.rows - 2); | |
282 | list_del(&s->list); | |
283 | if (!list_empty(&s->update)) | |
284 | list_del(&s->update); | |
285 | tp->nr_lines--; | |
286 | if (free_string(&tp->freemem, s) >= size) | |
287 | break; | |
288 | } | |
289 | s = alloc_string(&tp->freemem, size); | |
290 | BUG_ON(!s); | |
291 | if (tp->nr_up != 0 && | |
292 | tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { | |
293 | tp->nr_up = tp->nr_lines - tp->view.rows + 2; | |
294 | tty3270_rebuild_update(tp); | |
295 | tty3270_update_status(tp); | |
296 | } | |
297 | return s; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Add an empty line to the list. | |
302 | */ | |
303 | static void | |
304 | tty3270_blank_line(struct tty3270 *tp) | |
305 | { | |
306 | static const unsigned char blueprint[] = | |
307 | { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, | |
308 | TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; | |
309 | struct string *s; | |
310 | ||
311 | s = tty3270_alloc_string(tp, sizeof(blueprint)); | |
312 | memcpy(s->string, blueprint, sizeof(blueprint)); | |
313 | s->len = sizeof(blueprint); | |
314 | list_add_tail(&s->list, &tp->lines); | |
315 | tp->nr_lines++; | |
316 | if (tp->nr_up != 0) | |
317 | tp->nr_up++; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Write request completion callback. | |
322 | */ | |
323 | static void | |
324 | tty3270_write_callback(struct raw3270_request *rq, void *data) | |
325 | { | |
881e18f9 | 326 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 | 327 | |
1da177e4 | 328 | if (rq->rc != 0) { |
25985edc | 329 | /* Write wasn't successful. Refresh all. */ |
1da177e4 LT |
330 | tp->update_flags = TTY_UPDATE_ALL; |
331 | tty3270_set_timer(tp, 1); | |
332 | } | |
333 | raw3270_request_reset(rq); | |
334 | xchg(&tp->write, rq); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Update 3270 display. | |
339 | */ | |
340 | static void | |
341 | tty3270_update(struct tty3270 *tp) | |
342 | { | |
343 | static char invalid_sba[2] = { 0xff, 0xff }; | |
344 | struct raw3270_request *wrq; | |
345 | unsigned long updated; | |
346 | struct string *s, *n; | |
347 | char *sba, *str; | |
348 | int rc, len; | |
349 | ||
350 | wrq = xchg(&tp->write, 0); | |
351 | if (!wrq) { | |
352 | tty3270_set_timer(tp, 1); | |
353 | return; | |
354 | } | |
355 | ||
356 | spin_lock(&tp->view.lock); | |
357 | updated = 0; | |
205d7ab9 MS |
358 | if (tp->update_flags & TTY_UPDATE_ALL) { |
359 | tty3270_rebuild_update(tp); | |
360 | tty3270_update_status(tp); | |
361 | tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST | | |
362 | TTY_UPDATE_INPUT | TTY_UPDATE_STATUS; | |
363 | } | |
1da177e4 LT |
364 | if (tp->update_flags & TTY_UPDATE_ERASE) { |
365 | /* Use erase write alternate to erase display. */ | |
366 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
367 | updated |= TTY_UPDATE_ERASE; | |
368 | } else | |
369 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
370 | ||
371 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
372 | tp->wcc = TW_NONE; | |
373 | ||
374 | /* | |
375 | * Update status line. | |
376 | */ | |
377 | if (tp->update_flags & TTY_UPDATE_STATUS) | |
378 | if (raw3270_request_add_data(wrq, tp->status->string, | |
379 | tp->status->len) == 0) | |
380 | updated |= TTY_UPDATE_STATUS; | |
381 | ||
382 | /* | |
383 | * Write input line. | |
384 | */ | |
385 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
386 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
387 | tp->prompt->len) == 0) | |
388 | updated |= TTY_UPDATE_INPUT; | |
389 | ||
390 | sba = invalid_sba; | |
391 | ||
392 | if (tp->update_flags & TTY_UPDATE_LIST) { | |
393 | /* Write strings in the update list to the screen. */ | |
394 | list_for_each_entry_safe(s, n, &tp->update, update) { | |
395 | str = s->string; | |
396 | len = s->len; | |
397 | /* | |
398 | * Skip TO_SBA at the start of the string if the | |
399 | * last output position matches the start address | |
400 | * of this line. | |
401 | */ | |
402 | if (s->string[1] == sba[0] && s->string[2] == sba[1]) | |
403 | str += 3, len -= 3; | |
404 | if (raw3270_request_add_data(wrq, str, len) != 0) | |
405 | break; | |
406 | list_del_init(&s->update); | |
407 | sba = s->string + s->len - 3; | |
408 | } | |
409 | if (list_empty(&tp->update)) | |
410 | updated |= TTY_UPDATE_LIST; | |
411 | } | |
412 | wrq->callback = tty3270_write_callback; | |
413 | rc = raw3270_start(&tp->view, wrq); | |
414 | if (rc == 0) { | |
415 | tp->update_flags &= ~updated; | |
416 | if (tp->update_flags) | |
417 | tty3270_set_timer(tp, 1); | |
418 | } else { | |
419 | raw3270_request_reset(wrq); | |
420 | xchg(&tp->write, wrq); | |
421 | } | |
422 | spin_unlock(&tp->view.lock); | |
1da177e4 LT |
423 | } |
424 | ||
425 | /* | |
426 | * Command recalling. | |
427 | */ | |
428 | static void | |
429 | tty3270_rcl_add(struct tty3270 *tp, char *input, int len) | |
430 | { | |
431 | struct string *s; | |
432 | ||
d2c993d8 | 433 | tp->rcl_walk = NULL; |
1da177e4 LT |
434 | if (len <= 0) |
435 | return; | |
436 | if (tp->rcl_nr >= tp->rcl_max) { | |
437 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
438 | list_del(&s->list); | |
439 | free_string(&tp->freemem, s); | |
440 | tp->rcl_nr--; | |
441 | } | |
442 | s = tty3270_alloc_string(tp, len); | |
443 | memcpy(s->string, input, len); | |
444 | list_add_tail(&s->list, &tp->rcl_lines); | |
445 | tp->rcl_nr++; | |
446 | } | |
447 | ||
448 | static void | |
449 | tty3270_rcl_backward(struct kbd_data *kbd) | |
450 | { | |
ba186e7d | 451 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
452 | struct string *s; |
453 | ||
1da177e4 LT |
454 | spin_lock_bh(&tp->view.lock); |
455 | if (tp->inattr == TF_INPUT) { | |
456 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
457 | tp->rcl_walk = tp->rcl_walk->prev; | |
458 | else if (!list_empty(&tp->rcl_lines)) | |
459 | tp->rcl_walk = tp->rcl_lines.prev; | |
460 | s = tp->rcl_walk ? | |
d2c993d8 | 461 | list_entry(tp->rcl_walk, struct string, list) : NULL; |
1da177e4 LT |
462 | if (tp->rcl_walk) { |
463 | s = list_entry(tp->rcl_walk, struct string, list); | |
464 | tty3270_update_prompt(tp, s->string, s->len); | |
465 | } else | |
d2c993d8 | 466 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
467 | tty3270_set_timer(tp, 1); |
468 | } | |
469 | spin_unlock_bh(&tp->view.lock); | |
470 | } | |
471 | ||
472 | /* | |
473 | * Deactivate tty view. | |
474 | */ | |
475 | static void | |
476 | tty3270_exit_tty(struct kbd_data *kbd) | |
477 | { | |
ba186e7d | 478 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 479 | |
1da177e4 LT |
480 | raw3270_deactivate_view(&tp->view); |
481 | } | |
482 | ||
483 | /* | |
484 | * Scroll forward in history. | |
485 | */ | |
486 | static void | |
487 | tty3270_scroll_forward(struct kbd_data *kbd) | |
488 | { | |
ba186e7d | 489 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
490 | int nr_up; |
491 | ||
1da177e4 LT |
492 | spin_lock_bh(&tp->view.lock); |
493 | nr_up = tp->nr_up - tp->view.rows + 2; | |
494 | if (nr_up < 0) | |
495 | nr_up = 0; | |
496 | if (nr_up != tp->nr_up) { | |
497 | tp->nr_up = nr_up; | |
498 | tty3270_rebuild_update(tp); | |
499 | tty3270_update_status(tp); | |
500 | tty3270_set_timer(tp, 1); | |
501 | } | |
502 | spin_unlock_bh(&tp->view.lock); | |
503 | } | |
504 | ||
505 | /* | |
506 | * Scroll backward in history. | |
507 | */ | |
508 | static void | |
509 | tty3270_scroll_backward(struct kbd_data *kbd) | |
510 | { | |
ba186e7d | 511 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
512 | int nr_up; |
513 | ||
1da177e4 LT |
514 | spin_lock_bh(&tp->view.lock); |
515 | nr_up = tp->nr_up + tp->view.rows - 2; | |
516 | if (nr_up + tp->view.rows - 2 > tp->nr_lines) | |
517 | nr_up = tp->nr_lines - tp->view.rows + 2; | |
518 | if (nr_up != tp->nr_up) { | |
519 | tp->nr_up = nr_up; | |
520 | tty3270_rebuild_update(tp); | |
521 | tty3270_update_status(tp); | |
522 | tty3270_set_timer(tp, 1); | |
523 | } | |
524 | spin_unlock_bh(&tp->view.lock); | |
525 | } | |
526 | ||
527 | /* | |
528 | * Pass input line to tty. | |
529 | */ | |
530 | static void | |
531 | tty3270_read_tasklet(struct raw3270_request *rrq) | |
532 | { | |
533 | static char kreset_data = TW_KR; | |
881e18f9 | 534 | struct tty3270 *tp = container_of(rrq->view, struct tty3270, view); |
1da177e4 LT |
535 | char *input; |
536 | int len; | |
537 | ||
1da177e4 LT |
538 | spin_lock_bh(&tp->view.lock); |
539 | /* | |
540 | * Two AID keys are special: For 0x7d (enter) the input line | |
541 | * has to be emitted to the tty and for 0x6d the screen | |
542 | * needs to be redrawn. | |
543 | */ | |
d2c993d8 | 544 | input = NULL; |
1da177e4 LT |
545 | len = 0; |
546 | if (tp->input->string[0] == 0x7d) { | |
547 | /* Enter: write input to tty. */ | |
548 | input = tp->input->string + 6; | |
549 | len = tp->input->len - 6 - rrq->rescnt; | |
550 | if (tp->inattr != TF_INPUTN) | |
551 | tty3270_rcl_add(tp, input, len); | |
552 | if (tp->nr_up > 0) { | |
553 | tp->nr_up = 0; | |
554 | tty3270_rebuild_update(tp); | |
555 | tty3270_update_status(tp); | |
556 | } | |
557 | /* Clear input area. */ | |
d2c993d8 | 558 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
559 | tty3270_set_timer(tp, 1); |
560 | } else if (tp->input->string[0] == 0x6d) { | |
561 | /* Display has been cleared. Redraw. */ | |
1da177e4 LT |
562 | tp->update_flags = TTY_UPDATE_ALL; |
563 | tty3270_set_timer(tp, 1); | |
564 | } | |
565 | spin_unlock_bh(&tp->view.lock); | |
566 | ||
567 | /* Start keyboard reset command. */ | |
568 | raw3270_request_reset(tp->kreset); | |
569 | raw3270_request_set_cmd(tp->kreset, TC_WRITE); | |
570 | raw3270_request_add_data(tp->kreset, &kreset_data, 1); | |
571 | raw3270_start(&tp->view, tp->kreset); | |
572 | ||
ba186e7d JS |
573 | while (len-- > 0) |
574 | kbd_keycode(tp->kbd, *input++); | |
575 | /* Emit keycode for AID byte. */ | |
576 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
1da177e4 LT |
577 | |
578 | raw3270_request_reset(rrq); | |
579 | xchg(&tp->read, rrq); | |
580 | raw3270_put_view(&tp->view); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Read request completion callback. | |
585 | */ | |
586 | static void | |
587 | tty3270_read_callback(struct raw3270_request *rq, void *data) | |
588 | { | |
881e18f9 | 589 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 LT |
590 | raw3270_get_view(rq->view); |
591 | /* Schedule tasklet to pass input to tty. */ | |
881e18f9 | 592 | tasklet_schedule(&tp->readlet); |
1da177e4 LT |
593 | } |
594 | ||
595 | /* | |
596 | * Issue a read request. Call with device lock. | |
597 | */ | |
598 | static void | |
599 | tty3270_issue_read(struct tty3270 *tp, int lock) | |
600 | { | |
601 | struct raw3270_request *rrq; | |
602 | int rc; | |
603 | ||
604 | rrq = xchg(&tp->read, 0); | |
605 | if (!rrq) | |
606 | /* Read already scheduled. */ | |
607 | return; | |
608 | rrq->callback = tty3270_read_callback; | |
609 | rrq->callback_data = tp; | |
610 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
611 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
612 | /* Issue the read modified request. */ | |
613 | if (lock) { | |
614 | rc = raw3270_start(&tp->view, rrq); | |
615 | } else | |
616 | rc = raw3270_start_irq(&tp->view, rrq); | |
617 | if (rc) { | |
618 | raw3270_request_reset(rrq); | |
619 | xchg(&tp->read, rrq); | |
620 | } | |
621 | } | |
622 | ||
623 | /* | |
624 | * Switch to the tty view. | |
625 | */ | |
626 | static int | |
627 | tty3270_activate(struct raw3270_view *view) | |
628 | { | |
881e18f9 | 629 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
1da177e4 | 630 | |
1da177e4 LT |
631 | tp->update_flags = TTY_UPDATE_ALL; |
632 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
633 | return 0; |
634 | } | |
635 | ||
636 | static void | |
637 | tty3270_deactivate(struct raw3270_view *view) | |
638 | { | |
881e18f9 | 639 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
205d7ab9 | 640 | |
205d7ab9 | 641 | del_timer(&tp->timer); |
1da177e4 LT |
642 | } |
643 | ||
644 | static int | |
645 | tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) | |
646 | { | |
647 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
23d805b6 | 648 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
649 | if (!tp->throttle) |
650 | tty3270_issue_read(tp, 0); | |
651 | else | |
652 | tp->attn = 1; | |
653 | } | |
654 | ||
655 | if (rq) { | |
23d805b6 | 656 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
657 | rq->rc = -EIO; |
658 | else | |
659 | /* Normal end. Copy residual count. */ | |
23d805b6 | 660 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 LT |
661 | } |
662 | return RAW3270_IO_DONE; | |
663 | } | |
664 | ||
665 | /* | |
666 | * Allocate tty3270 structure. | |
667 | */ | |
668 | static struct tty3270 * | |
669 | tty3270_alloc_view(void) | |
670 | { | |
671 | struct tty3270 *tp; | |
672 | int pages; | |
673 | ||
88abaab4 | 674 | tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
1da177e4 LT |
675 | if (!tp) |
676 | goto out_err; | |
1da177e4 LT |
677 | tp->freemem_pages = |
678 | kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL); | |
679 | if (!tp->freemem_pages) | |
680 | goto out_tp; | |
681 | INIT_LIST_HEAD(&tp->freemem); | |
9d2ae233 JS |
682 | INIT_LIST_HEAD(&tp->lines); |
683 | INIT_LIST_HEAD(&tp->update); | |
684 | INIT_LIST_HEAD(&tp->rcl_lines); | |
685 | tp->rcl_max = 20; | |
9d2ae233 | 686 | |
1da177e4 LT |
687 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { |
688 | tp->freemem_pages[pages] = (void *) | |
689 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
690 | if (!tp->freemem_pages[pages]) | |
691 | goto out_pages; | |
692 | add_string_memory(&tp->freemem, | |
693 | tp->freemem_pages[pages], PAGE_SIZE); | |
694 | } | |
695 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
ed3cb6f0 | 696 | if (IS_ERR(tp->write)) |
1da177e4 LT |
697 | goto out_pages; |
698 | tp->read = raw3270_request_alloc(0); | |
ed3cb6f0 | 699 | if (IS_ERR(tp->read)) |
1da177e4 LT |
700 | goto out_write; |
701 | tp->kreset = raw3270_request_alloc(1); | |
ed3cb6f0 | 702 | if (IS_ERR(tp->kreset)) |
1da177e4 LT |
703 | goto out_read; |
704 | tp->kbd = kbd_alloc(); | |
705 | if (!tp->kbd) | |
706 | goto out_reset; | |
57985d7e MS |
707 | |
708 | tty_port_init(&tp->port); | |
709 | setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update, | |
710 | (unsigned long) tp); | |
711 | tasklet_init(&tp->readlet, | |
712 | (void (*)(unsigned long)) tty3270_read_tasklet, | |
713 | (unsigned long) tp->read); | |
714 | ||
1da177e4 LT |
715 | return tp; |
716 | ||
717 | out_reset: | |
718 | raw3270_request_free(tp->kreset); | |
719 | out_read: | |
720 | raw3270_request_free(tp->read); | |
721 | out_write: | |
722 | raw3270_request_free(tp->write); | |
723 | out_pages: | |
724 | while (pages--) | |
725 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
726 | kfree(tp->freemem_pages); | |
191c5f10 | 727 | tty_port_destroy(&tp->port); |
1da177e4 LT |
728 | out_tp: |
729 | kfree(tp); | |
730 | out_err: | |
731 | return ERR_PTR(-ENOMEM); | |
732 | } | |
733 | ||
734 | /* | |
735 | * Free tty3270 structure. | |
736 | */ | |
737 | static void | |
738 | tty3270_free_view(struct tty3270 *tp) | |
739 | { | |
740 | int pages; | |
741 | ||
205d7ab9 | 742 | del_timer_sync(&tp->timer); |
1da177e4 LT |
743 | kbd_free(tp->kbd); |
744 | raw3270_request_free(tp->kreset); | |
745 | raw3270_request_free(tp->read); | |
746 | raw3270_request_free(tp->write); | |
747 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) | |
748 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
749 | kfree(tp->freemem_pages); | |
191c5f10 | 750 | tty_port_destroy(&tp->port); |
1da177e4 LT |
751 | kfree(tp); |
752 | } | |
753 | ||
754 | /* | |
755 | * Allocate tty3270 screen. | |
756 | */ | |
757 | static int | |
758 | tty3270_alloc_screen(struct tty3270 *tp) | |
759 | { | |
760 | unsigned long size; | |
761 | int lines; | |
762 | ||
763 | size = sizeof(struct tty3270_line) * (tp->view.rows - 2); | |
88abaab4 | 764 | tp->screen = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
765 | if (!tp->screen) |
766 | goto out_err; | |
1da177e4 LT |
767 | for (lines = 0; lines < tp->view.rows - 2; lines++) { |
768 | size = sizeof(struct tty3270_cell) * tp->view.cols; | |
88abaab4 | 769 | tp->screen[lines].cells = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
770 | if (!tp->screen[lines].cells) |
771 | goto out_screen; | |
1da177e4 LT |
772 | } |
773 | return 0; | |
774 | out_screen: | |
775 | while (lines--) | |
776 | kfree(tp->screen[lines].cells); | |
777 | kfree(tp->screen); | |
778 | out_err: | |
779 | return -ENOMEM; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Free tty3270 screen. | |
784 | */ | |
785 | static void | |
786 | tty3270_free_screen(struct tty3270 *tp) | |
787 | { | |
788 | int lines; | |
789 | ||
790 | for (lines = 0; lines < tp->view.rows - 2; lines++) | |
791 | kfree(tp->screen[lines].cells); | |
792 | kfree(tp->screen); | |
793 | } | |
794 | ||
795 | /* | |
796 | * Unlink tty3270 data structure from tty. | |
797 | */ | |
798 | static void | |
799 | tty3270_release(struct raw3270_view *view) | |
800 | { | |
881e18f9 | 801 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
ba186e7d | 802 | struct tty_struct *tty = tty_port_tty_get(&tp->port); |
1da177e4 | 803 | |
1da177e4 | 804 | if (tty) { |
d2c993d8 | 805 | tty->driver_data = NULL; |
ba186e7d | 806 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
807 | tty_hangup(tty); |
808 | raw3270_put_view(&tp->view); | |
ba186e7d | 809 | tty_kref_put(tty); |
1da177e4 LT |
810 | } |
811 | } | |
812 | ||
813 | /* | |
814 | * Free tty3270 data structure | |
815 | */ | |
816 | static void | |
817 | tty3270_free(struct raw3270_view *view) | |
818 | { | |
881e18f9 JS |
819 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
820 | tty3270_free_screen(tp); | |
821 | tty3270_free_view(tp); | |
1da177e4 LT |
822 | } |
823 | ||
824 | /* | |
825 | * Delayed freeing of tty3270 views. | |
826 | */ | |
827 | static void | |
828 | tty3270_del_views(void) | |
829 | { | |
1da177e4 LT |
830 | int i; |
831 | ||
832 | for (i = 0; i < tty3270_max_index; i++) { | |
881e18f9 | 833 | struct raw3270_view *view = |
ed3cb6f0 | 834 | raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR); |
881e18f9 JS |
835 | if (!IS_ERR(view)) |
836 | raw3270_del_view(view); | |
1da177e4 LT |
837 | } |
838 | } | |
839 | ||
2b67fc46 | 840 | static struct raw3270_fn tty3270_fn = { |
1da177e4 LT |
841 | .activate = tty3270_activate, |
842 | .deactivate = tty3270_deactivate, | |
843 | .intv = (void *) tty3270_irq, | |
844 | .release = tty3270_release, | |
845 | .free = tty3270_free | |
846 | }; | |
847 | ||
848 | /* | |
20cda6f2 | 849 | * This routine is called whenever a 3270 tty is opened first time. |
1da177e4 | 850 | */ |
20cda6f2 | 851 | static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 | 852 | { |
881e18f9 | 853 | struct raw3270_view *view; |
1da177e4 LT |
854 | struct tty3270 *tp; |
855 | int i, rc; | |
856 | ||
1da177e4 | 857 | /* Check if the tty3270 is already there. */ |
881e18f9 | 858 | view = raw3270_find_view(&tty3270_fn, |
ed3cb6f0 | 859 | tty->index + RAW3270_FIRSTMINOR); |
881e18f9 JS |
860 | if (!IS_ERR(view)) { |
861 | tp = container_of(view, struct tty3270, view); | |
1da177e4 LT |
862 | tty->driver_data = tp; |
863 | tty->winsize.ws_row = tp->view.rows - 2; | |
864 | tty->winsize.ws_col = tp->view.cols; | |
865 | tty->low_latency = 0; | |
ba186e7d JS |
866 | /* why to reassign? */ |
867 | tty_port_tty_set(&tp->port, tty); | |
1da177e4 | 868 | tp->inattr = TF_INPUT; |
20cda6f2 | 869 | return tty_port_install(&tp->port, driver, tty); |
1da177e4 LT |
870 | } |
871 | if (tty3270_max_index < tty->index + 1) | |
872 | tty3270_max_index = tty->index + 1; | |
873 | ||
874 | /* Quick exit if there is no device for tty->index. */ | |
881e18f9 | 875 | if (PTR_ERR(view) == -ENODEV) |
1da177e4 LT |
876 | return -ENODEV; |
877 | ||
878 | /* Allocate tty3270 structure on first open. */ | |
879 | tp = tty3270_alloc_view(); | |
880 | if (IS_ERR(tp)) | |
881 | return PTR_ERR(tp); | |
882 | ||
ed3cb6f0 RH |
883 | rc = raw3270_add_view(&tp->view, &tty3270_fn, |
884 | tty->index + RAW3270_FIRSTMINOR); | |
1da177e4 LT |
885 | if (rc) { |
886 | tty3270_free_view(tp); | |
887 | return rc; | |
888 | } | |
889 | ||
890 | rc = tty3270_alloc_screen(tp); | |
891 | if (rc) { | |
1da177e4 | 892 | raw3270_put_view(&tp->view); |
ed3cb6f0 | 893 | raw3270_del_view(&tp->view); |
1da177e4 LT |
894 | return rc; |
895 | } | |
896 | ||
ba186e7d | 897 | tty_port_tty_set(&tp->port, tty); |
1da177e4 | 898 | tty->low_latency = 0; |
1da177e4 LT |
899 | tty->winsize.ws_row = tp->view.rows - 2; |
900 | tty->winsize.ws_col = tp->view.cols; | |
901 | ||
902 | tty3270_create_prompt(tp); | |
903 | tty3270_create_status(tp); | |
904 | tty3270_update_status(tp); | |
905 | ||
906 | /* Create blank line for every line in the tty output area. */ | |
907 | for (i = 0; i < tp->view.rows - 2; i++) | |
908 | tty3270_blank_line(tp); | |
909 | ||
ba186e7d | 910 | tp->kbd->port = &tp->port; |
1da177e4 LT |
911 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; |
912 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
913 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
914 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
915 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
916 | ||
917 | raw3270_activate_view(&tp->view); | |
20cda6f2 JS |
918 | |
919 | rc = tty_port_install(&tp->port, driver, tty); | |
920 | if (rc) { | |
921 | raw3270_put_view(&tp->view); | |
922 | return rc; | |
923 | } | |
924 | ||
925 | tty->driver_data = tp; | |
926 | ||
1da177e4 LT |
927 | return 0; |
928 | } | |
929 | ||
736c9fd2 MS |
930 | /* |
931 | * This routine is called whenever a 3270 tty is opened. | |
932 | */ | |
933 | static int | |
934 | tty3270_open(struct tty_struct *tty, struct file *filp) | |
935 | { | |
936 | struct tty3270 *tp = tty->driver_data; | |
937 | struct tty_port *port = &tp->port; | |
938 | ||
939 | port->count++; | |
940 | tty_port_tty_set(port, tty); | |
941 | return 0; | |
942 | } | |
943 | ||
1da177e4 LT |
944 | /* |
945 | * This routine is called when the 3270 tty is closed. We wait | |
946 | * for the remaining request to be completed. Then we clean up. | |
947 | */ | |
948 | static void | |
949 | tty3270_close(struct tty_struct *tty, struct file * filp) | |
950 | { | |
881e18f9 | 951 | struct tty3270 *tp = tty->driver_data; |
1da177e4 LT |
952 | |
953 | if (tty->count > 1) | |
954 | return; | |
1da177e4 | 955 | if (tp) { |
d2c993d8 | 956 | tty->driver_data = NULL; |
ba186e7d | 957 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
958 | } |
959 | } | |
960 | ||
20cda6f2 JS |
961 | static void tty3270_cleanup(struct tty_struct *tty) |
962 | { | |
963 | struct tty3270 *tp = tty->driver_data; | |
964 | ||
965 | if (tp) | |
966 | raw3270_put_view(&tp->view); | |
967 | } | |
968 | ||
1da177e4 LT |
969 | /* |
970 | * We always have room. | |
971 | */ | |
972 | static int | |
973 | tty3270_write_room(struct tty_struct *tty) | |
974 | { | |
975 | return INT_MAX; | |
976 | } | |
977 | ||
978 | /* | |
979 | * Insert character into the screen at the current position with the | |
980 | * current color and highlight. This function does NOT do cursor movement. | |
981 | */ | |
74c76c84 | 982 | static void tty3270_put_character(struct tty3270 *tp, char ch) |
1da177e4 LT |
983 | { |
984 | struct tty3270_line *line; | |
985 | struct tty3270_cell *cell; | |
986 | ||
987 | line = tp->screen + tp->cy; | |
988 | if (line->len <= tp->cx) { | |
989 | while (line->len < tp->cx) { | |
990 | cell = line->cells + line->len; | |
991 | cell->character = tp->view.ascebc[' ']; | |
992 | cell->highlight = tp->highlight; | |
993 | cell->f_color = tp->f_color; | |
994 | line->len++; | |
995 | } | |
996 | line->len++; | |
997 | } | |
998 | cell = line->cells + tp->cx; | |
999 | cell->character = tp->view.ascebc[(unsigned int) ch]; | |
1000 | cell->highlight = tp->highlight; | |
1001 | cell->f_color = tp->f_color; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
1006 | */ | |
1007 | static void | |
1008 | tty3270_convert_line(struct tty3270 *tp, int line_nr) | |
1009 | { | |
1010 | struct tty3270_line *line; | |
1011 | struct tty3270_cell *cell; | |
1012 | struct string *s, *n; | |
1013 | unsigned char highlight; | |
1014 | unsigned char f_color; | |
1015 | char *cp; | |
1016 | int flen, i; | |
1017 | ||
1018 | /* Determine how long the fragment will be. */ | |
1019 | flen = 3; /* Prefix (TO_SBA). */ | |
1020 | line = tp->screen + line_nr; | |
1021 | flen += line->len; | |
1022 | highlight = TAX_RESET; | |
1023 | f_color = TAC_RESET; | |
1024 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1025 | if (cell->highlight != highlight) { | |
1026 | flen += 3; /* TO_SA to switch highlight. */ | |
1027 | highlight = cell->highlight; | |
1028 | } | |
1029 | if (cell->f_color != f_color) { | |
1030 | flen += 3; /* TO_SA to switch color. */ | |
1031 | f_color = cell->f_color; | |
1032 | } | |
1033 | } | |
1034 | if (highlight != TAX_RESET) | |
1035 | flen += 3; /* TO_SA to reset hightlight. */ | |
1036 | if (f_color != TAC_RESET) | |
1037 | flen += 3; /* TO_SA to reset color. */ | |
1038 | if (line->len < tp->view.cols) | |
1039 | flen += 4; /* Postfix (TO_RA). */ | |
1040 | ||
1041 | /* Find the line in the list. */ | |
1042 | i = tp->view.rows - 2 - line_nr; | |
1043 | list_for_each_entry_reverse(s, &tp->lines, list) | |
1044 | if (--i <= 0) | |
1045 | break; | |
1046 | /* | |
1047 | * Check if the line needs to get reallocated. | |
1048 | */ | |
1049 | if (s->len != flen) { | |
1050 | /* Reallocate string. */ | |
1051 | n = tty3270_alloc_string(tp, flen); | |
1052 | list_add(&n->list, &s->list); | |
1053 | list_del_init(&s->list); | |
1054 | if (!list_empty(&s->update)) | |
1055 | list_del_init(&s->update); | |
1056 | free_string(&tp->freemem, s); | |
1057 | s = n; | |
1058 | } | |
1059 | ||
1060 | /* Write 3270 data fragment. */ | |
1061 | cp = s->string; | |
1062 | *cp++ = TO_SBA; | |
1063 | *cp++ = 0; | |
1064 | *cp++ = 0; | |
1065 | ||
1066 | highlight = TAX_RESET; | |
1067 | f_color = TAC_RESET; | |
1068 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
1069 | if (cell->highlight != highlight) { | |
1070 | *cp++ = TO_SA; | |
1071 | *cp++ = TAT_EXTHI; | |
1072 | *cp++ = cell->highlight; | |
1073 | highlight = cell->highlight; | |
1074 | } | |
1075 | if (cell->f_color != f_color) { | |
1076 | *cp++ = TO_SA; | |
1077 | *cp++ = TAT_COLOR; | |
1078 | *cp++ = cell->f_color; | |
1079 | f_color = cell->f_color; | |
1080 | } | |
1081 | *cp++ = cell->character; | |
1082 | } | |
1083 | if (highlight != TAX_RESET) { | |
1084 | *cp++ = TO_SA; | |
1085 | *cp++ = TAT_EXTHI; | |
1086 | *cp++ = TAX_RESET; | |
1087 | } | |
1088 | if (f_color != TAC_RESET) { | |
1089 | *cp++ = TO_SA; | |
1090 | *cp++ = TAT_COLOR; | |
1091 | *cp++ = TAC_RESET; | |
1092 | } | |
1093 | if (line->len < tp->view.cols) { | |
1094 | *cp++ = TO_RA; | |
1095 | *cp++ = 0; | |
1096 | *cp++ = 0; | |
1097 | *cp++ = 0; | |
1098 | } | |
1099 | ||
1100 | if (tp->nr_up + line_nr < tp->view.rows - 2) { | |
1101 | /* Line is currently visible on screen. */ | |
1102 | tty3270_update_string(tp, s, line_nr); | |
1103 | /* Add line to update list. */ | |
1104 | if (list_empty(&s->update)) { | |
1105 | list_add_tail(&s->update, &tp->update); | |
1106 | tp->update_flags |= TTY_UPDATE_LIST; | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Do carriage return. | |
1113 | */ | |
1114 | static void | |
1115 | tty3270_cr(struct tty3270 *tp) | |
1116 | { | |
1117 | tp->cx = 0; | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Do line feed. | |
1122 | */ | |
1123 | static void | |
1124 | tty3270_lf(struct tty3270 *tp) | |
1125 | { | |
1126 | struct tty3270_line temp; | |
1127 | int i; | |
1128 | ||
1129 | tty3270_convert_line(tp, tp->cy); | |
1130 | if (tp->cy < tp->view.rows - 3) { | |
1131 | tp->cy++; | |
1132 | return; | |
1133 | } | |
1134 | /* Last line just filled up. Add new, blank line. */ | |
1135 | tty3270_blank_line(tp); | |
1136 | temp = tp->screen[0]; | |
1137 | temp.len = 0; | |
1138 | for (i = 0; i < tp->view.rows - 3; i++) | |
1139 | tp->screen[i] = tp->screen[i+1]; | |
1140 | tp->screen[tp->view.rows - 3] = temp; | |
1141 | tty3270_rebuild_update(tp); | |
1142 | } | |
1143 | ||
1144 | static void | |
1145 | tty3270_ri(struct tty3270 *tp) | |
1146 | { | |
1147 | if (tp->cy > 0) { | |
1148 | tty3270_convert_line(tp, tp->cy); | |
1149 | tp->cy--; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * Insert characters at current position. | |
1155 | */ | |
1156 | static void | |
1157 | tty3270_insert_characters(struct tty3270 *tp, int n) | |
1158 | { | |
1159 | struct tty3270_line *line; | |
1160 | int k; | |
1161 | ||
1162 | line = tp->screen + tp->cy; | |
1163 | while (line->len < tp->cx) { | |
1164 | line->cells[line->len].character = tp->view.ascebc[' ']; | |
1165 | line->cells[line->len].highlight = TAX_RESET; | |
1166 | line->cells[line->len].f_color = TAC_RESET; | |
1167 | line->len++; | |
1168 | } | |
1169 | if (n > tp->view.cols - tp->cx) | |
1170 | n = tp->view.cols - tp->cx; | |
1171 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1172 | while (k--) | |
1173 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1174 | line->len += n; | |
1175 | if (line->len > tp->view.cols) | |
1176 | line->len = tp->view.cols; | |
1177 | while (n-- > 0) { | |
1178 | line->cells[tp->cx + n].character = tp->view.ascebc[' ']; | |
1179 | line->cells[tp->cx + n].highlight = tp->highlight; | |
1180 | line->cells[tp->cx + n].f_color = tp->f_color; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Delete characters at current position. | |
1186 | */ | |
1187 | static void | |
1188 | tty3270_delete_characters(struct tty3270 *tp, int n) | |
1189 | { | |
1190 | struct tty3270_line *line; | |
1191 | int i; | |
1192 | ||
1193 | line = tp->screen + tp->cy; | |
1194 | if (line->len <= tp->cx) | |
1195 | return; | |
1196 | if (line->len - tp->cx <= n) { | |
1197 | line->len = tp->cx; | |
1198 | return; | |
1199 | } | |
1200 | for (i = tp->cx; i + n < line->len; i++) | |
1201 | line->cells[i] = line->cells[i + n]; | |
1202 | line->len -= n; | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Erase characters at current position. | |
1207 | */ | |
1208 | static void | |
1209 | tty3270_erase_characters(struct tty3270 *tp, int n) | |
1210 | { | |
1211 | struct tty3270_line *line; | |
1212 | struct tty3270_cell *cell; | |
1213 | ||
1214 | line = tp->screen + tp->cy; | |
1215 | while (line->len > tp->cx && n-- > 0) { | |
1216 | cell = line->cells + tp->cx++; | |
1217 | cell->character = ' '; | |
1218 | cell->highlight = TAX_RESET; | |
1219 | cell->f_color = TAC_RESET; | |
1220 | } | |
1221 | tp->cx += n; | |
1222 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Erase line, 3 different cases: | |
1227 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1228 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1229 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1230 | */ | |
1231 | static void | |
1232 | tty3270_erase_line(struct tty3270 *tp, int mode) | |
1233 | { | |
1234 | struct tty3270_line *line; | |
1235 | struct tty3270_cell *cell; | |
1236 | int i; | |
1237 | ||
1238 | line = tp->screen + tp->cy; | |
1239 | if (mode == 0) | |
1240 | line->len = tp->cx; | |
1241 | else if (mode == 1) { | |
1242 | for (i = 0; i < tp->cx; i++) { | |
1243 | cell = line->cells + i; | |
1244 | cell->character = ' '; | |
1245 | cell->highlight = TAX_RESET; | |
1246 | cell->f_color = TAC_RESET; | |
1247 | } | |
1248 | if (line->len <= tp->cx) | |
1249 | line->len = tp->cx + 1; | |
1250 | } else if (mode == 2) | |
1251 | line->len = 0; | |
1252 | tty3270_convert_line(tp, tp->cy); | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Erase display, 3 different cases: | |
1257 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1258 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1259 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1260 | */ | |
1261 | static void | |
1262 | tty3270_erase_display(struct tty3270 *tp, int mode) | |
1263 | { | |
1264 | int i; | |
1265 | ||
1266 | if (mode == 0) { | |
1267 | tty3270_erase_line(tp, 0); | |
1268 | for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { | |
1269 | tp->screen[i].len = 0; | |
1270 | tty3270_convert_line(tp, i); | |
1271 | } | |
1272 | } else if (mode == 1) { | |
1273 | for (i = 0; i < tp->cy; i++) { | |
1274 | tp->screen[i].len = 0; | |
1275 | tty3270_convert_line(tp, i); | |
1276 | } | |
1277 | tty3270_erase_line(tp, 1); | |
1278 | } else if (mode == 2) { | |
1279 | for (i = 0; i < tp->view.rows - 2; i++) { | |
1280 | tp->screen[i].len = 0; | |
1281 | tty3270_convert_line(tp, i); | |
1282 | } | |
1283 | } | |
1284 | tty3270_rebuild_update(tp); | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Set attributes found in an escape sequence. | |
1289 | * Esc [ <attr> ; <attr> ; ... m | |
1290 | */ | |
1291 | static void | |
1292 | tty3270_set_attributes(struct tty3270 *tp) | |
1293 | { | |
1294 | static unsigned char f_colors[] = { | |
1295 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, | |
1296 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1297 | }; | |
1298 | int i, attr; | |
1299 | ||
1300 | for (i = 0; i <= tp->esc_npar; i++) { | |
1301 | attr = tp->esc_par[i]; | |
1302 | switch (attr) { | |
1303 | case 0: /* Reset */ | |
1304 | tp->highlight = TAX_RESET; | |
1305 | tp->f_color = TAC_RESET; | |
1306 | break; | |
1307 | /* Highlight. */ | |
1308 | case 4: /* Start underlining. */ | |
1309 | tp->highlight = TAX_UNDER; | |
1310 | break; | |
1311 | case 5: /* Start blink. */ | |
1312 | tp->highlight = TAX_BLINK; | |
1313 | break; | |
1314 | case 7: /* Start reverse. */ | |
1315 | tp->highlight = TAX_REVER; | |
1316 | break; | |
1317 | case 24: /* End underlining */ | |
1318 | if (tp->highlight == TAX_UNDER) | |
1319 | tp->highlight = TAX_RESET; | |
1320 | break; | |
1321 | case 25: /* End blink. */ | |
1322 | if (tp->highlight == TAX_BLINK) | |
1323 | tp->highlight = TAX_RESET; | |
1324 | break; | |
1325 | case 27: /* End reverse. */ | |
1326 | if (tp->highlight == TAX_REVER) | |
1327 | tp->highlight = TAX_RESET; | |
1328 | break; | |
1329 | /* Foreground color. */ | |
1330 | case 30: /* Black */ | |
1331 | case 31: /* Red */ | |
1332 | case 32: /* Green */ | |
1333 | case 33: /* Yellow */ | |
1334 | case 34: /* Blue */ | |
1335 | case 35: /* Magenta */ | |
1336 | case 36: /* Cyan */ | |
1337 | case 37: /* White */ | |
1338 | case 39: /* Black */ | |
1339 | tp->f_color = f_colors[attr - 30]; | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | static inline int | |
1346 | tty3270_getpar(struct tty3270 *tp, int ix) | |
1347 | { | |
1348 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1349 | } | |
1350 | ||
1351 | static void | |
1352 | tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) | |
1353 | { | |
364c8558 HC |
1354 | int max_cx = max(0, cx); |
1355 | int max_cy = max(0, cy); | |
1356 | ||
1357 | tp->cx = min_t(int, tp->view.cols - 1, max_cx); | |
1358 | cy = min_t(int, tp->view.rows - 3, max_cy); | |
1da177e4 LT |
1359 | if (cy != tp->cy) { |
1360 | tty3270_convert_line(tp, tp->cy); | |
1361 | tp->cy = cy; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * Process escape sequences. Known sequences: | |
1367 | * Esc 7 Save Cursor Position | |
1368 | * Esc 8 Restore Cursor Position | |
1369 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1370 | * Esc [ Pn ; Pn H Cursor Position | |
1371 | * Esc [ Pn ; Pn f Cursor Position | |
1372 | * Esc [ Pn A Cursor Up | |
1373 | * Esc [ Pn B Cursor Down | |
1374 | * Esc [ Pn C Cursor Forward | |
1375 | * Esc [ Pn D Cursor Backward | |
1376 | * Esc [ Pn G Cursor Horizontal Absolute | |
1377 | * Esc [ Pn X Erase Characters | |
1378 | * Esc [ Ps J Erase in Display | |
1379 | * Esc [ Ps K Erase in Line | |
1380 | * // FIXME: add all the new ones. | |
1381 | * | |
1382 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1383 | * Ps is a selective parameter. | |
1384 | */ | |
1385 | static void | |
1386 | tty3270_escape_sequence(struct tty3270 *tp, char ch) | |
1387 | { | |
1388 | enum { ESnormal, ESesc, ESsquare, ESgetpars }; | |
1389 | ||
1390 | if (tp->esc_state == ESnormal) { | |
1391 | if (ch == 0x1b) | |
1392 | /* Starting new escape sequence. */ | |
1393 | tp->esc_state = ESesc; | |
1394 | return; | |
1395 | } | |
1396 | if (tp->esc_state == ESesc) { | |
1397 | tp->esc_state = ESnormal; | |
1398 | switch (ch) { | |
1399 | case '[': | |
1400 | tp->esc_state = ESsquare; | |
1401 | break; | |
1402 | case 'E': | |
1403 | tty3270_cr(tp); | |
1404 | tty3270_lf(tp); | |
1405 | break; | |
1406 | case 'M': | |
1407 | tty3270_ri(tp); | |
1408 | break; | |
1409 | case 'D': | |
1410 | tty3270_lf(tp); | |
1411 | break; | |
1412 | case 'Z': /* Respond ID. */ | |
ba186e7d | 1413 | kbd_puts_queue(&tp->port, "\033[?6c"); |
1da177e4 LT |
1414 | break; |
1415 | case '7': /* Save cursor position. */ | |
1416 | tp->saved_cx = tp->cx; | |
1417 | tp->saved_cy = tp->cy; | |
1418 | tp->saved_highlight = tp->highlight; | |
1419 | tp->saved_f_color = tp->f_color; | |
1420 | break; | |
1421 | case '8': /* Restore cursor position. */ | |
1422 | tty3270_convert_line(tp, tp->cy); | |
1423 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); | |
1424 | tp->highlight = tp->saved_highlight; | |
1425 | tp->f_color = tp->saved_f_color; | |
1426 | break; | |
1427 | case 'c': /* Reset terminal. */ | |
1428 | tp->cx = tp->saved_cx = 0; | |
1429 | tp->cy = tp->saved_cy = 0; | |
1430 | tp->highlight = tp->saved_highlight = TAX_RESET; | |
1431 | tp->f_color = tp->saved_f_color = TAC_RESET; | |
1432 | tty3270_erase_display(tp, 2); | |
1433 | break; | |
1434 | } | |
1435 | return; | |
1436 | } | |
1437 | if (tp->esc_state == ESsquare) { | |
1438 | tp->esc_state = ESgetpars; | |
1439 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1440 | tp->esc_npar = 0; | |
1441 | tp->esc_ques = (ch == '?'); | |
1442 | if (tp->esc_ques) | |
1443 | return; | |
1444 | } | |
1445 | if (tp->esc_state == ESgetpars) { | |
1446 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { | |
1447 | tp->esc_npar++; | |
1448 | return; | |
1449 | } | |
1450 | if (ch >= '0' && ch <= '9') { | |
1451 | tp->esc_par[tp->esc_npar] *= 10; | |
1452 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1453 | return; | |
1454 | } | |
1455 | } | |
1456 | tp->esc_state = ESnormal; | |
1457 | if (ch == 'n' && !tp->esc_ques) { | |
1458 | if (tp->esc_par[0] == 5) /* Status report. */ | |
ba186e7d | 1459 | kbd_puts_queue(&tp->port, "\033[0n"); |
1da177e4 LT |
1460 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ |
1461 | char buf[40]; | |
1462 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
ba186e7d | 1463 | kbd_puts_queue(&tp->port, buf); |
1da177e4 LT |
1464 | } |
1465 | return; | |
1466 | } | |
1467 | if (tp->esc_ques) | |
1468 | return; | |
1469 | switch (ch) { | |
1470 | case 'm': | |
1471 | tty3270_set_attributes(tp); | |
1472 | break; | |
1473 | case 'H': /* Set cursor position. */ | |
1474 | case 'f': | |
1475 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1476 | tty3270_getpar(tp, 0) - 1); | |
1477 | break; | |
1478 | case 'd': /* Set y position. */ | |
1479 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1480 | break; | |
1481 | case 'A': /* Cursor up. */ | |
1482 | case 'F': | |
1483 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1484 | break; | |
1485 | case 'B': /* Cursor down. */ | |
1486 | case 'e': | |
1487 | case 'E': | |
1488 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1489 | break; | |
1490 | case 'C': /* Cursor forward. */ | |
1491 | case 'a': | |
1492 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1493 | break; | |
1494 | case 'D': /* Cursor backward. */ | |
1495 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1496 | break; | |
1497 | case 'G': /* Set x position. */ | |
1498 | case '`': | |
1499 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1500 | break; | |
1501 | case 'X': /* Erase Characters. */ | |
1502 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1503 | break; | |
1504 | case 'J': /* Erase display. */ | |
1505 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1506 | break; | |
1507 | case 'K': /* Erase line. */ | |
1508 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1509 | break; | |
1510 | case 'P': /* Delete characters. */ | |
1511 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1512 | break; | |
1513 | case '@': /* Insert characters. */ | |
1514 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1515 | break; | |
1516 | case 's': /* 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 'u': /* 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 | } | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * String write routine for 3270 ttys | |
1533 | */ | |
1534 | static void | |
20acdfa8 JS |
1535 | tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty, |
1536 | const unsigned char *buf, int count) | |
1da177e4 LT |
1537 | { |
1538 | int i_msg, i; | |
1539 | ||
1540 | spin_lock_bh(&tp->view.lock); | |
20acdfa8 | 1541 | for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) { |
1da177e4 LT |
1542 | if (tp->esc_state != 0) { |
1543 | /* Continue escape sequence. */ | |
1544 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1545 | continue; | |
1546 | } | |
1547 | ||
1548 | switch (buf[i_msg]) { | |
1549 | case 0x07: /* '\a' -- Alarm */ | |
1550 | tp->wcc |= TW_PLUSALARM; | |
1551 | break; | |
1552 | case 0x08: /* Backspace. */ | |
1553 | if (tp->cx > 0) { | |
1554 | tp->cx--; | |
1555 | tty3270_put_character(tp, ' '); | |
1556 | } | |
1557 | break; | |
1558 | case 0x09: /* '\t' -- Tabulate */ | |
1559 | for (i = tp->cx % 8; i < 8; i++) { | |
1560 | if (tp->cx >= tp->view.cols) { | |
1561 | tty3270_cr(tp); | |
1562 | tty3270_lf(tp); | |
1563 | break; | |
1564 | } | |
1565 | tty3270_put_character(tp, ' '); | |
1566 | tp->cx++; | |
1567 | } | |
1568 | break; | |
1569 | case 0x0a: /* '\n' -- New Line */ | |
1570 | tty3270_cr(tp); | |
1571 | tty3270_lf(tp); | |
1572 | break; | |
1573 | case 0x0c: /* '\f' -- Form Feed */ | |
1574 | tty3270_erase_display(tp, 2); | |
1575 | tp->cx = tp->cy = 0; | |
1576 | break; | |
1577 | case 0x0d: /* '\r' -- Carriage Return */ | |
1578 | tp->cx = 0; | |
1579 | break; | |
1580 | case 0x0f: /* SuSE "exit alternate mode" */ | |
1581 | break; | |
1582 | case 0x1b: /* Start escape sequence. */ | |
1583 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1584 | break; | |
1585 | default: /* Insert normal character. */ | |
1586 | if (tp->cx >= tp->view.cols) { | |
1587 | tty3270_cr(tp); | |
1588 | tty3270_lf(tp); | |
1589 | } | |
1590 | tty3270_put_character(tp, buf[i_msg]); | |
1591 | tp->cx++; | |
1592 | break; | |
1593 | } | |
1594 | } | |
1595 | /* Convert current line to 3270 data fragment. */ | |
1596 | tty3270_convert_line(tp, tp->cy); | |
1597 | ||
1598 | /* Setup timer to update display after 1/10 second */ | |
1599 | if (!timer_pending(&tp->timer)) | |
1600 | tty3270_set_timer(tp, HZ/10); | |
1601 | ||
1602 | spin_unlock_bh(&tp->view.lock); | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * String write routine for 3270 ttys | |
1607 | */ | |
1608 | static int | |
1609 | tty3270_write(struct tty_struct * tty, | |
1610 | const unsigned char *buf, int count) | |
1611 | { | |
1612 | struct tty3270 *tp; | |
1613 | ||
1614 | tp = tty->driver_data; | |
1615 | if (!tp) | |
1616 | return 0; | |
1617 | if (tp->char_count > 0) { | |
20acdfa8 | 1618 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1619 | tp->char_count = 0; |
1620 | } | |
20acdfa8 | 1621 | tty3270_do_write(tp, tty, buf, count); |
1da177e4 LT |
1622 | return count; |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Put single characters to the ttys character buffer | |
1627 | */ | |
74c76c84 | 1628 | static int tty3270_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1629 | { |
1630 | struct tty3270 *tp; | |
1631 | ||
1632 | tp = tty->driver_data; | |
74c76c84 HC |
1633 | if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE) |
1634 | return 0; | |
1635 | tp->char_buf[tp->char_count++] = ch; | |
1636 | return 1; | |
1da177e4 LT |
1637 | } |
1638 | ||
1639 | /* | |
1640 | * Flush all characters from the ttys characeter buffer put there | |
1641 | * by tty3270_put_char. | |
1642 | */ | |
1643 | static void | |
1644 | tty3270_flush_chars(struct tty_struct *tty) | |
1645 | { | |
1646 | struct tty3270 *tp; | |
1647 | ||
1648 | tp = tty->driver_data; | |
1649 | if (!tp) | |
1650 | return; | |
1651 | if (tp->char_count > 0) { | |
20acdfa8 | 1652 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1653 | tp->char_count = 0; |
1654 | } | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Returns the number of characters in the output buffer. This is | |
1659 | * used in tty_wait_until_sent to wait until all characters have | |
1660 | * appeared on the screen. | |
1661 | */ | |
1662 | static int | |
1663 | tty3270_chars_in_buffer(struct tty_struct *tty) | |
1664 | { | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | static void | |
1669 | tty3270_flush_buffer(struct tty_struct *tty) | |
1670 | { | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * Check for visible/invisible input switches | |
1675 | */ | |
1676 | static void | |
606d099c | 1677 | tty3270_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 LT |
1678 | { |
1679 | struct tty3270 *tp; | |
1680 | int new; | |
1681 | ||
1682 | tp = tty->driver_data; | |
1683 | if (!tp) | |
1684 | return; | |
1685 | spin_lock_bh(&tp->view.lock); | |
1686 | if (L_ICANON(tty)) { | |
1687 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1688 | if (new != tp->inattr) { | |
1689 | tp->inattr = new; | |
d2c993d8 | 1690 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
1691 | tty3270_set_timer(tp, 1); |
1692 | } | |
1693 | } | |
1694 | spin_unlock_bh(&tp->view.lock); | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Disable reading from a 3270 tty | |
1699 | */ | |
1700 | static void | |
1701 | tty3270_throttle(struct tty_struct * tty) | |
1702 | { | |
1703 | struct tty3270 *tp; | |
1704 | ||
1705 | tp = tty->driver_data; | |
1706 | if (!tp) | |
1707 | return; | |
1708 | tp->throttle = 1; | |
1709 | } | |
1710 | ||
1711 | /* | |
1712 | * Enable reading from a 3270 tty | |
1713 | */ | |
1714 | static void | |
1715 | tty3270_unthrottle(struct tty_struct * tty) | |
1716 | { | |
1717 | struct tty3270 *tp; | |
1718 | ||
1719 | tp = tty->driver_data; | |
1720 | if (!tp) | |
1721 | return; | |
1722 | tp->throttle = 0; | |
1723 | if (tp->attn) | |
1724 | tty3270_issue_read(tp, 1); | |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * Hang up the tty device. | |
1729 | */ | |
1730 | static void | |
1731 | tty3270_hangup(struct tty_struct *tty) | |
1732 | { | |
1733 | // FIXME: implement | |
1734 | } | |
1735 | ||
1736 | static void | |
1737 | tty3270_wait_until_sent(struct tty_struct *tty, int timeout) | |
1738 | { | |
1739 | } | |
1740 | ||
65c56e07 HC |
1741 | static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd, |
1742 | unsigned long arg) | |
1da177e4 LT |
1743 | { |
1744 | struct tty3270 *tp; | |
1745 | ||
1746 | tp = tty->driver_data; | |
1747 | if (!tp) | |
1748 | return -ENODEV; | |
1749 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1750 | return -EIO; | |
65c56e07 | 1751 | return kbd_ioctl(tp->kbd, cmd, arg); |
1da177e4 LT |
1752 | } |
1753 | ||
9d4bfd41 | 1754 | #ifdef CONFIG_COMPAT |
65c56e07 HC |
1755 | static long tty3270_compat_ioctl(struct tty_struct *tty, |
1756 | unsigned int cmd, unsigned long arg) | |
9d4bfd41 AB |
1757 | { |
1758 | struct tty3270 *tp; | |
1759 | ||
1760 | tp = tty->driver_data; | |
1761 | if (!tp) | |
1762 | return -ENODEV; | |
1763 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1764 | return -EIO; | |
65c56e07 | 1765 | return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg)); |
9d4bfd41 AB |
1766 | } |
1767 | #endif | |
1768 | ||
b68e31d0 | 1769 | static const struct tty_operations tty3270_ops = { |
20cda6f2 JS |
1770 | .install = tty3270_install, |
1771 | .cleanup = tty3270_cleanup, | |
736c9fd2 | 1772 | .open = tty3270_open, |
1da177e4 LT |
1773 | .close = tty3270_close, |
1774 | .write = tty3270_write, | |
1775 | .put_char = tty3270_put_char, | |
1776 | .flush_chars = tty3270_flush_chars, | |
1777 | .write_room = tty3270_write_room, | |
1778 | .chars_in_buffer = tty3270_chars_in_buffer, | |
1779 | .flush_buffer = tty3270_flush_buffer, | |
1780 | .throttle = tty3270_throttle, | |
1781 | .unthrottle = tty3270_unthrottle, | |
1782 | .hangup = tty3270_hangup, | |
1783 | .wait_until_sent = tty3270_wait_until_sent, | |
1784 | .ioctl = tty3270_ioctl, | |
9d4bfd41 AB |
1785 | #ifdef CONFIG_COMPAT |
1786 | .compat_ioctl = tty3270_compat_ioctl, | |
1787 | #endif | |
1da177e4 LT |
1788 | .set_termios = tty3270_set_termios |
1789 | }; | |
1790 | ||
1da177e4 LT |
1791 | /* |
1792 | * 3270 tty registration code called from tty_init(). | |
1793 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1794 | */ | |
2b67fc46 | 1795 | static int __init tty3270_init(void) |
1da177e4 LT |
1796 | { |
1797 | struct tty_driver *driver; | |
1798 | int ret; | |
1799 | ||
ed3cb6f0 | 1800 | driver = alloc_tty_driver(RAW3270_MAXDEVS); |
1da177e4 LT |
1801 | if (!driver) |
1802 | return -ENOMEM; | |
1803 | ||
1804 | /* | |
1805 | * Initialize the tty_driver structure | |
1806 | * Entries in tty3270_driver that are NOT initialized: | |
1807 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1808 | */ | |
1da177e4 LT |
1809 | driver->driver_name = "ttyTUB"; |
1810 | driver->name = "ttyTUB"; | |
1811 | driver->major = IBM_TTY3270_MAJOR; | |
ed3cb6f0 | 1812 | driver->minor_start = RAW3270_FIRSTMINOR; |
1da177e4 LT |
1813 | driver->type = TTY_DRIVER_TYPE_SYSTEM; |
1814 | driver->subtype = SYSTEM_TYPE_TTY; | |
1815 | driver->init_termios = tty_std_termios; | |
c4d6ebeb | 1816 | driver->flags = TTY_DRIVER_RESET_TERMIOS; |
1da177e4 LT |
1817 | tty_set_operations(driver, &tty3270_ops); |
1818 | ret = tty_register_driver(driver); | |
1819 | if (ret) { | |
1da177e4 LT |
1820 | put_tty_driver(driver); |
1821 | return ret; | |
1822 | } | |
1823 | tty3270_driver = driver; | |
1da177e4 LT |
1824 | return 0; |
1825 | } | |
1826 | ||
1827 | static void __exit | |
1828 | tty3270_exit(void) | |
1829 | { | |
1830 | struct tty_driver *driver; | |
1831 | ||
1da177e4 | 1832 | driver = tty3270_driver; |
d2c993d8 | 1833 | tty3270_driver = NULL; |
1da177e4 | 1834 | tty_unregister_driver(driver); |
2312e4f3 | 1835 | put_tty_driver(driver); |
1da177e4 LT |
1836 | tty3270_del_views(); |
1837 | } | |
1838 | ||
1839 | MODULE_LICENSE("GPL"); | |
1840 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
1841 | ||
1842 | module_init(tty3270_init); | |
1843 | module_exit(tty3270_exit); |