Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4b214a0c | 2 | * IBM/3270 Driver - console view. |
1da177e4 | 3 | * |
4b214a0c MS |
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> | |
7 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
8 | */ |
9 | ||
233faec9 | 10 | #include <linux/module.h> |
1da177e4 LT |
11 | #include <linux/console.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/types.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
600b5d16 | 17 | #include <linux/err.h> |
2332ce1a | 18 | #include <linux/reboot.h> |
1da177e4 LT |
19 | |
20 | #include <asm/ccwdev.h> | |
21 | #include <asm/cio.h> | |
22 | #include <asm/cpcmd.h> | |
23 | #include <asm/ebcdic.h> | |
24 | ||
25 | #include "raw3270.h" | |
364c8558 | 26 | #include "tty3270.h" |
1da177e4 LT |
27 | #include "ctrlchar.h" |
28 | ||
29 | #define CON3270_OUTPUT_BUFFER_SIZE 1024 | |
30 | #define CON3270_STRING_PAGES 4 | |
31 | ||
32 | static struct raw3270_fn con3270_fn; | |
33 | ||
233faec9 MS |
34 | static bool auto_update = 1; |
35 | module_param(auto_update, bool, 0); | |
36 | ||
1da177e4 LT |
37 | /* |
38 | * Main 3270 console view data structure. | |
39 | */ | |
40 | struct con3270 { | |
41 | struct raw3270_view view; | |
1da177e4 LT |
42 | struct list_head freemem; /* list of free memory for strings. */ |
43 | ||
44 | /* Output stuff. */ | |
45 | struct list_head lines; /* list of lines. */ | |
46 | struct list_head update; /* list of lines to update. */ | |
47 | int line_nr; /* line number for next update. */ | |
48 | int nr_lines; /* # lines in list. */ | |
49 | int nr_up; /* # lines up in history. */ | |
50 | unsigned long update_flags; /* Update indication bits. */ | |
51 | struct string *cline; /* current output line. */ | |
52 | struct string *status; /* last line of display. */ | |
53 | struct raw3270_request *write; /* single write request. */ | |
54 | struct timer_list timer; | |
55 | ||
56 | /* Input stuff. */ | |
57 | struct string *input; /* input string for read request. */ | |
58 | struct raw3270_request *read; /* single read request. */ | |
59 | struct raw3270_request *kreset; /* single keyboard reset request. */ | |
60 | struct tasklet_struct readlet; /* tasklet to issue read request. */ | |
61 | }; | |
62 | ||
63 | static struct con3270 *condev; | |
64 | ||
65 | /* con3270->update_flags. See con3270_update for details. */ | |
66 | #define CON_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
67 | #define CON_UPDATE_LIST 2 /* Update lines in tty3270->update. */ | |
68 | #define CON_UPDATE_STATUS 4 /* Update status line. */ | |
205d7ab9 | 69 | #define CON_UPDATE_ALL 8 /* Recreate screen. */ |
1da177e4 LT |
70 | |
71 | static void con3270_update(struct con3270 *); | |
72 | ||
73 | /* | |
74 | * Setup timeout for a device. On timeout trigger an update. | |
75 | */ | |
2b67fc46 | 76 | static void con3270_set_timer(struct con3270 *cp, int expires) |
1da177e4 | 77 | { |
205d7ab9 MS |
78 | if (expires == 0) |
79 | del_timer(&cp->timer); | |
80 | else | |
81 | mod_timer(&cp->timer, jiffies + expires); | |
1da177e4 LT |
82 | } |
83 | ||
84 | /* | |
85 | * The status line is the last line of the screen. It shows the string | |
86 | * "console view" in the lower left corner and "Running"/"More..."/"Holding" | |
87 | * in the lower right corner of the screen. | |
88 | */ | |
89 | static void | |
90 | con3270_update_status(struct con3270 *cp) | |
91 | { | |
92 | char *str; | |
93 | ||
94 | str = (cp->nr_up != 0) ? "History" : "Running"; | |
95 | memcpy(cp->status->string + 24, str, 7); | |
96 | codepage_convert(cp->view.ascebc, cp->status->string + 24, 7); | |
97 | cp->update_flags |= CON_UPDATE_STATUS; | |
98 | } | |
99 | ||
100 | static void | |
101 | con3270_create_status(struct con3270 *cp) | |
102 | { | |
103 | static const unsigned char blueprint[] = | |
104 | { TO_SBA, 0, 0, TO_SF,TF_LOG,TO_SA,TAT_COLOR, TAC_GREEN, | |
105 | 'c','o','n','s','o','l','e',' ','v','i','e','w', | |
106 | TO_RA,0,0,0,'R','u','n','n','i','n','g',TO_SF,TF_LOG }; | |
107 | ||
108 | cp->status = alloc_string(&cp->freemem, sizeof(blueprint)); | |
109 | /* Copy blueprint to status line */ | |
110 | memcpy(cp->status->string, blueprint, sizeof(blueprint)); | |
111 | /* Set TO_RA addresses. */ | |
112 | raw3270_buffer_address(cp->view.dev, cp->status->string + 1, | |
113 | cp->view.cols * (cp->view.rows - 1)); | |
114 | raw3270_buffer_address(cp->view.dev, cp->status->string + 21, | |
115 | cp->view.cols * cp->view.rows - 8); | |
116 | /* Convert strings to ebcdic. */ | |
117 | codepage_convert(cp->view.ascebc, cp->status->string + 8, 12); | |
118 | codepage_convert(cp->view.ascebc, cp->status->string + 24, 7); | |
119 | } | |
120 | ||
121 | /* | |
122 | * Set output offsets to 3270 datastream fragment of a console string. | |
123 | */ | |
124 | static void | |
125 | con3270_update_string(struct con3270 *cp, struct string *s, int nr) | |
126 | { | |
127 | if (s->len >= cp->view.cols - 5) | |
128 | return; | |
129 | raw3270_buffer_address(cp->view.dev, s->string + s->len - 3, | |
130 | cp->view.cols * (nr + 1)); | |
131 | } | |
132 | ||
133 | /* | |
134 | * Rebuild update list to print all lines. | |
135 | */ | |
136 | static void | |
137 | con3270_rebuild_update(struct con3270 *cp) | |
138 | { | |
139 | struct string *s, *n; | |
140 | int nr; | |
141 | ||
142 | /* | |
143 | * Throw away update list and create a new one, | |
144 | * containing all lines that will fit on the screen. | |
145 | */ | |
146 | list_for_each_entry_safe(s, n, &cp->update, update) | |
147 | list_del_init(&s->update); | |
148 | nr = cp->view.rows - 2 + cp->nr_up; | |
149 | list_for_each_entry_reverse(s, &cp->lines, list) { | |
150 | if (nr < cp->view.rows - 1) | |
151 | list_add(&s->update, &cp->update); | |
152 | if (--nr < 0) | |
153 | break; | |
154 | } | |
155 | cp->line_nr = 0; | |
156 | cp->update_flags |= CON_UPDATE_LIST; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Alloc string for size bytes. Free strings from history if necessary. | |
161 | */ | |
162 | static struct string * | |
163 | con3270_alloc_string(struct con3270 *cp, size_t size) | |
164 | { | |
165 | struct string *s, *n; | |
166 | ||
167 | s = alloc_string(&cp->freemem, size); | |
168 | if (s) | |
169 | return s; | |
170 | list_for_each_entry_safe(s, n, &cp->lines, list) { | |
171 | list_del(&s->list); | |
172 | if (!list_empty(&s->update)) | |
173 | list_del(&s->update); | |
174 | cp->nr_lines--; | |
175 | if (free_string(&cp->freemem, s) >= size) | |
176 | break; | |
177 | } | |
178 | s = alloc_string(&cp->freemem, size); | |
179 | BUG_ON(!s); | |
180 | if (cp->nr_up != 0 && cp->nr_up + cp->view.rows > cp->nr_lines) { | |
181 | cp->nr_up = cp->nr_lines - cp->view.rows + 1; | |
182 | con3270_rebuild_update(cp); | |
183 | con3270_update_status(cp); | |
184 | } | |
185 | return s; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Write completion callback. | |
190 | */ | |
191 | static void | |
192 | con3270_write_callback(struct raw3270_request *rq, void *data) | |
193 | { | |
194 | raw3270_request_reset(rq); | |
195 | xchg(&((struct con3270 *) rq->view)->write, rq); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Update console display. | |
200 | */ | |
201 | static void | |
202 | con3270_update(struct con3270 *cp) | |
203 | { | |
204 | struct raw3270_request *wrq; | |
205 | char wcc, prolog[6]; | |
206 | unsigned long flags; | |
207 | unsigned long updated; | |
208 | struct string *s, *n; | |
209 | int rc; | |
210 | ||
233faec9 MS |
211 | if (!auto_update && !raw3270_view_active(&cp->view)) |
212 | return; | |
ed3cb6f0 RH |
213 | if (cp->view.dev) |
214 | raw3270_activate_view(&cp->view); | |
215 | ||
1da177e4 LT |
216 | wrq = xchg(&cp->write, 0); |
217 | if (!wrq) { | |
218 | con3270_set_timer(cp, 1); | |
219 | return; | |
220 | } | |
221 | ||
222 | spin_lock_irqsave(&cp->view.lock, flags); | |
223 | updated = 0; | |
205d7ab9 MS |
224 | if (cp->update_flags & CON_UPDATE_ALL) { |
225 | con3270_rebuild_update(cp); | |
226 | con3270_update_status(cp); | |
227 | cp->update_flags = CON_UPDATE_ERASE | CON_UPDATE_LIST | | |
228 | CON_UPDATE_STATUS; | |
229 | } | |
1da177e4 LT |
230 | if (cp->update_flags & CON_UPDATE_ERASE) { |
231 | /* Use erase write alternate to initialize display. */ | |
232 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
233 | updated |= CON_UPDATE_ERASE; | |
234 | } else | |
235 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
236 | ||
237 | wcc = TW_NONE; | |
238 | raw3270_request_add_data(wrq, &wcc, 1); | |
239 | ||
240 | /* | |
241 | * Update status line. | |
242 | */ | |
243 | if (cp->update_flags & CON_UPDATE_STATUS) | |
244 | if (raw3270_request_add_data(wrq, cp->status->string, | |
245 | cp->status->len) == 0) | |
246 | updated |= CON_UPDATE_STATUS; | |
247 | ||
248 | if (cp->update_flags & CON_UPDATE_LIST) { | |
249 | prolog[0] = TO_SBA; | |
250 | prolog[3] = TO_SA; | |
251 | prolog[4] = TAT_COLOR; | |
252 | prolog[5] = TAC_TURQ; | |
253 | raw3270_buffer_address(cp->view.dev, prolog + 1, | |
254 | cp->view.cols * cp->line_nr); | |
255 | raw3270_request_add_data(wrq, prolog, 6); | |
256 | /* Write strings in the update list to the screen. */ | |
257 | list_for_each_entry_safe(s, n, &cp->update, update) { | |
258 | if (s != cp->cline) | |
259 | con3270_update_string(cp, s, cp->line_nr); | |
260 | if (raw3270_request_add_data(wrq, s->string, | |
261 | s->len) != 0) | |
262 | break; | |
263 | list_del_init(&s->update); | |
264 | if (s != cp->cline) | |
265 | cp->line_nr++; | |
266 | } | |
267 | if (list_empty(&cp->update)) | |
268 | updated |= CON_UPDATE_LIST; | |
269 | } | |
270 | wrq->callback = con3270_write_callback; | |
271 | rc = raw3270_start(&cp->view, wrq); | |
272 | if (rc == 0) { | |
273 | cp->update_flags &= ~updated; | |
274 | if (cp->update_flags) | |
275 | con3270_set_timer(cp, 1); | |
276 | } else { | |
277 | raw3270_request_reset(wrq); | |
278 | xchg(&cp->write, wrq); | |
279 | } | |
280 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
281 | } | |
282 | ||
283 | /* | |
284 | * Read tasklet. | |
285 | */ | |
286 | static void | |
287 | con3270_read_tasklet(struct raw3270_request *rrq) | |
288 | { | |
289 | static char kreset_data = TW_KR; | |
290 | struct con3270 *cp; | |
291 | unsigned long flags; | |
292 | int nr_up, deactivate; | |
293 | ||
294 | cp = (struct con3270 *) rrq->view; | |
295 | spin_lock_irqsave(&cp->view.lock, flags); | |
296 | nr_up = cp->nr_up; | |
297 | deactivate = 0; | |
298 | /* Check aid byte. */ | |
299 | switch (cp->input->string[0]) { | |
300 | case 0x7d: /* enter: jump to bottom. */ | |
301 | nr_up = 0; | |
302 | break; | |
303 | case 0xf3: /* PF3: deactivate the console view. */ | |
304 | deactivate = 1; | |
305 | break; | |
306 | case 0x6d: /* clear: start from scratch. */ | |
1da177e4 LT |
307 | cp->update_flags = CON_UPDATE_ALL; |
308 | con3270_set_timer(cp, 1); | |
309 | break; | |
310 | case 0xf7: /* PF7: do a page up in the console log. */ | |
311 | nr_up += cp->view.rows - 2; | |
312 | if (nr_up + cp->view.rows - 1 > cp->nr_lines) { | |
313 | nr_up = cp->nr_lines - cp->view.rows + 1; | |
314 | if (nr_up < 0) | |
315 | nr_up = 0; | |
316 | } | |
317 | break; | |
318 | case 0xf8: /* PF8: do a page down in the console log. */ | |
319 | nr_up -= cp->view.rows - 2; | |
320 | if (nr_up < 0) | |
321 | nr_up = 0; | |
322 | break; | |
323 | } | |
324 | if (nr_up != cp->nr_up) { | |
325 | cp->nr_up = nr_up; | |
326 | con3270_rebuild_update(cp); | |
327 | con3270_update_status(cp); | |
328 | con3270_set_timer(cp, 1); | |
329 | } | |
330 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
331 | ||
332 | /* Start keyboard reset command. */ | |
333 | raw3270_request_reset(cp->kreset); | |
334 | raw3270_request_set_cmd(cp->kreset, TC_WRITE); | |
335 | raw3270_request_add_data(cp->kreset, &kreset_data, 1); | |
336 | raw3270_start(&cp->view, cp->kreset); | |
337 | ||
338 | if (deactivate) | |
339 | raw3270_deactivate_view(&cp->view); | |
340 | ||
341 | raw3270_request_reset(rrq); | |
342 | xchg(&cp->read, rrq); | |
343 | raw3270_put_view(&cp->view); | |
344 | } | |
345 | ||
346 | /* | |
347 | * Read request completion callback. | |
348 | */ | |
349 | static void | |
350 | con3270_read_callback(struct raw3270_request *rq, void *data) | |
351 | { | |
352 | raw3270_get_view(rq->view); | |
353 | /* Schedule tasklet to pass input to tty. */ | |
354 | tasklet_schedule(&((struct con3270 *) rq->view)->readlet); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Issue a read request. Called only from interrupt function. | |
359 | */ | |
360 | static void | |
361 | con3270_issue_read(struct con3270 *cp) | |
362 | { | |
363 | struct raw3270_request *rrq; | |
364 | int rc; | |
365 | ||
366 | rrq = xchg(&cp->read, 0); | |
367 | if (!rrq) | |
368 | /* Read already scheduled. */ | |
369 | return; | |
370 | rrq->callback = con3270_read_callback; | |
371 | rrq->callback_data = cp; | |
372 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
373 | raw3270_request_set_data(rrq, cp->input->string, cp->input->len); | |
374 | /* Issue the read modified request. */ | |
375 | rc = raw3270_start_irq(&cp->view, rrq); | |
376 | if (rc) | |
377 | raw3270_request_reset(rrq); | |
378 | } | |
379 | ||
380 | /* | |
381 | * Switch to the console view. | |
382 | */ | |
383 | static int | |
384 | con3270_activate(struct raw3270_view *view) | |
385 | { | |
1da177e4 LT |
386 | struct con3270 *cp; |
387 | ||
388 | cp = (struct con3270 *) view; | |
1da177e4 LT |
389 | cp->update_flags = CON_UPDATE_ALL; |
390 | con3270_set_timer(cp, 1); | |
1da177e4 LT |
391 | return 0; |
392 | } | |
393 | ||
394 | static void | |
395 | con3270_deactivate(struct raw3270_view *view) | |
396 | { | |
1da177e4 LT |
397 | struct con3270 *cp; |
398 | ||
399 | cp = (struct con3270 *) view; | |
1da177e4 | 400 | del_timer(&cp->timer); |
1da177e4 LT |
401 | } |
402 | ||
403 | static int | |
404 | con3270_irq(struct con3270 *cp, struct raw3270_request *rq, struct irb *irb) | |
405 | { | |
406 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
23d805b6 | 407 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) |
1da177e4 LT |
408 | con3270_issue_read(cp); |
409 | ||
410 | if (rq) { | |
23d805b6 | 411 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
412 | rq->rc = -EIO; |
413 | else | |
414 | /* Normal end. Copy residual count. */ | |
23d805b6 | 415 | rq->rescnt = irb->scsw.cmd.count; |
05bfd70b MS |
416 | } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
417 | /* Interrupt without an outstanding request -> update all */ | |
418 | cp->update_flags = CON_UPDATE_ALL; | |
419 | con3270_set_timer(cp, 1); | |
1da177e4 LT |
420 | } |
421 | return RAW3270_IO_DONE; | |
422 | } | |
423 | ||
424 | /* Console view to a 3270 device. */ | |
425 | static struct raw3270_fn con3270_fn = { | |
426 | .activate = con3270_activate, | |
427 | .deactivate = con3270_deactivate, | |
428 | .intv = (void *) con3270_irq | |
429 | }; | |
430 | ||
431 | static inline void | |
432 | con3270_cline_add(struct con3270 *cp) | |
433 | { | |
434 | if (!list_empty(&cp->cline->list)) | |
435 | /* Already added. */ | |
436 | return; | |
437 | list_add_tail(&cp->cline->list, &cp->lines); | |
438 | cp->nr_lines++; | |
439 | con3270_rebuild_update(cp); | |
440 | } | |
441 | ||
442 | static inline void | |
443 | con3270_cline_insert(struct con3270 *cp, unsigned char c) | |
444 | { | |
445 | cp->cline->string[cp->cline->len++] = | |
446 | cp->view.ascebc[(c < ' ') ? ' ' : c]; | |
447 | if (list_empty(&cp->cline->update)) { | |
448 | list_add_tail(&cp->cline->update, &cp->update); | |
449 | cp->update_flags |= CON_UPDATE_LIST; | |
450 | } | |
451 | } | |
452 | ||
453 | static inline void | |
454 | con3270_cline_end(struct con3270 *cp) | |
455 | { | |
456 | struct string *s; | |
457 | unsigned int size; | |
458 | ||
459 | /* Copy cline. */ | |
460 | size = (cp->cline->len < cp->view.cols - 5) ? | |
461 | cp->cline->len + 4 : cp->view.cols; | |
462 | s = con3270_alloc_string(cp, size); | |
463 | memcpy(s->string, cp->cline->string, cp->cline->len); | |
464 | if (s->len < cp->view.cols - 5) { | |
465 | s->string[s->len - 4] = TO_RA; | |
466 | s->string[s->len - 1] = 0; | |
467 | } else { | |
468 | while (--size > cp->cline->len) | |
469 | s->string[size] = cp->view.ascebc[' ']; | |
470 | } | |
471 | /* Replace cline with allocated line s and reset cline. */ | |
472 | list_add(&s->list, &cp->cline->list); | |
473 | list_del_init(&cp->cline->list); | |
474 | if (!list_empty(&cp->cline->update)) { | |
475 | list_add(&s->update, &cp->cline->update); | |
476 | list_del_init(&cp->cline->update); | |
477 | } | |
478 | cp->cline->len = 0; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Write a string to the 3270 console | |
483 | */ | |
484 | static void | |
485 | con3270_write(struct console *co, const char *str, unsigned int count) | |
486 | { | |
487 | struct con3270 *cp; | |
488 | unsigned long flags; | |
489 | unsigned char c; | |
490 | ||
491 | cp = condev; | |
1da177e4 LT |
492 | spin_lock_irqsave(&cp->view.lock, flags); |
493 | while (count-- > 0) { | |
494 | c = *str++; | |
495 | if (cp->cline->len == 0) | |
496 | con3270_cline_add(cp); | |
497 | if (c != '\n') | |
498 | con3270_cline_insert(cp, c); | |
499 | if (c == '\n' || cp->cline->len >= cp->view.cols) | |
500 | con3270_cline_end(cp); | |
501 | } | |
502 | /* Setup timer to output current console buffer after 1/10 second */ | |
205d7ab9 | 503 | cp->nr_up = 0; |
1da177e4 LT |
504 | if (cp->view.dev && !timer_pending(&cp->timer)) |
505 | con3270_set_timer(cp, HZ/10); | |
506 | spin_unlock_irqrestore(&cp->view.lock,flags); | |
507 | } | |
508 | ||
1da177e4 LT |
509 | static struct tty_driver * |
510 | con3270_device(struct console *c, int *index) | |
511 | { | |
512 | *index = c->index; | |
513 | return tty3270_driver; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Wait for end of write request. | |
518 | */ | |
519 | static void | |
520 | con3270_wait_write(struct con3270 *cp) | |
521 | { | |
522 | while (!cp->write) { | |
523 | raw3270_wait_cons_dev(cp->view.dev); | |
524 | barrier(); | |
525 | } | |
526 | } | |
527 | ||
528 | /* | |
2332ce1a HS |
529 | * panic() calls con3270_flush through a panic_notifier |
530 | * before the system enters a disabled, endless loop. | |
1da177e4 LT |
531 | */ |
532 | static void | |
2332ce1a | 533 | con3270_flush(void) |
1da177e4 LT |
534 | { |
535 | struct con3270 *cp; | |
536 | unsigned long flags; | |
537 | ||
538 | cp = condev; | |
539 | if (!cp->view.dev) | |
540 | return; | |
4b214a0c | 541 | raw3270_pm_unfreeze(&cp->view); |
233faec9 | 542 | raw3270_activate_view(&cp->view); |
1da177e4 LT |
543 | spin_lock_irqsave(&cp->view.lock, flags); |
544 | con3270_wait_write(cp); | |
545 | cp->nr_up = 0; | |
546 | con3270_rebuild_update(cp); | |
547 | con3270_update_status(cp); | |
548 | while (cp->update_flags != 0) { | |
549 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
550 | con3270_update(cp); | |
551 | spin_lock_irqsave(&cp->view.lock, flags); | |
552 | con3270_wait_write(cp); | |
553 | } | |
554 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
555 | } | |
556 | ||
2332ce1a HS |
557 | static int con3270_notify(struct notifier_block *self, |
558 | unsigned long event, void *data) | |
559 | { | |
560 | con3270_flush(); | |
561 | return NOTIFY_OK; | |
562 | } | |
563 | ||
564 | static struct notifier_block on_panic_nb = { | |
565 | .notifier_call = con3270_notify, | |
566 | .priority = 0, | |
567 | }; | |
568 | ||
569 | static struct notifier_block on_reboot_nb = { | |
570 | .notifier_call = con3270_notify, | |
571 | .priority = 0, | |
572 | }; | |
573 | ||
1da177e4 LT |
574 | /* |
575 | * The console structure for the 3270 console | |
576 | */ | |
577 | static struct console con3270 = { | |
578 | .name = "tty3270", | |
579 | .write = con3270_write, | |
580 | .device = con3270_device, | |
1da177e4 LT |
581 | .flags = CON_PRINTBUFFER, |
582 | }; | |
583 | ||
584 | /* | |
585 | * 3270 console initialization code called from console_init(). | |
1da177e4 LT |
586 | */ |
587 | static int __init | |
588 | con3270_init(void) | |
589 | { | |
1da177e4 LT |
590 | struct raw3270 *rp; |
591 | void *cbuf; | |
592 | int i; | |
593 | ||
594 | /* Check if 3270 is to be the console */ | |
595 | if (!CONSOLE_IS_3270) | |
596 | return -ENODEV; | |
597 | ||
598 | /* Set the console mode for VM */ | |
599 | if (MACHINE_IS_VM) { | |
6b979de3 CB |
600 | cpcmd("TERM CONMODE 3270", NULL, 0, NULL); |
601 | cpcmd("TERM AUTOCR OFF", NULL, 0, NULL); | |
1da177e4 LT |
602 | } |
603 | ||
2253e8d7 | 604 | rp = raw3270_setup_console(); |
1da177e4 LT |
605 | if (IS_ERR(rp)) |
606 | return PTR_ERR(rp); | |
607 | ||
33403dcf | 608 | condev = kzalloc(sizeof(struct con3270), GFP_KERNEL | GFP_DMA); |
cf61393f PM |
609 | if (!condev) |
610 | return -ENOMEM; | |
1da177e4 LT |
611 | condev->view.dev = rp; |
612 | ||
33403dcf | 613 | condev->read = raw3270_request_alloc(0); |
1da177e4 LT |
614 | condev->read->callback = con3270_read_callback; |
615 | condev->read->callback_data = condev; | |
33403dcf HC |
616 | condev->write = raw3270_request_alloc(CON3270_OUTPUT_BUFFER_SIZE); |
617 | condev->kreset = raw3270_request_alloc(1); | |
1da177e4 LT |
618 | |
619 | INIT_LIST_HEAD(&condev->lines); | |
620 | INIT_LIST_HEAD(&condev->update); | |
205d7ab9 MS |
621 | setup_timer(&condev->timer, (void (*)(unsigned long)) con3270_update, |
622 | (unsigned long) condev); | |
1da177e4 LT |
623 | tasklet_init(&condev->readlet, |
624 | (void (*)(unsigned long)) con3270_read_tasklet, | |
625 | (unsigned long) condev->read); | |
626 | ||
ed3cb6f0 | 627 | raw3270_add_view(&condev->view, &con3270_fn, 1); |
1da177e4 LT |
628 | |
629 | INIT_LIST_HEAD(&condev->freemem); | |
630 | for (i = 0; i < CON3270_STRING_PAGES; i++) { | |
33403dcf | 631 | cbuf = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
632 | add_string_memory(&condev->freemem, cbuf, PAGE_SIZE); |
633 | } | |
634 | condev->cline = alloc_string(&condev->freemem, condev->view.cols); | |
635 | condev->cline->len = 0; | |
636 | con3270_create_status(condev); | |
637 | condev->input = alloc_string(&condev->freemem, 80); | |
2332ce1a HS |
638 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); |
639 | register_reboot_notifier(&on_reboot_nb); | |
1da177e4 LT |
640 | register_console(&con3270); |
641 | return 0; | |
642 | } | |
643 | ||
644 | console_initcall(con3270_init); |