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