Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/char/con3270.c | |
3 | * IBM/3270 Driver - console view. | |
4 | * | |
5 | * Author(s): | |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/bootmem.h> |
12 | #include <linux/console.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/types.h> | |
600b5d16 | 17 | #include <linux/err.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. */ | |
66 | #define CON_UPDATE_ALL 7 | |
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 LT |
74 | { |
75 | if (expires == 0) { | |
76 | if (timer_pending(&cp->timer)) | |
77 | del_timer(&cp->timer); | |
78 | return; | |
79 | } | |
80 | if (timer_pending(&cp->timer) && | |
81 | mod_timer(&cp->timer, jiffies + expires)) | |
82 | return; | |
83 | cp->timer.function = (void (*)(unsigned long)) con3270_update; | |
84 | cp->timer.data = (unsigned long) cp; | |
85 | cp->timer.expires = jiffies + expires; | |
86 | add_timer(&cp->timer); | |
87 | } | |
88 | ||
89 | /* | |
90 | * The status line is the last line of the screen. It shows the string | |
91 | * "console view" in the lower left corner and "Running"/"More..."/"Holding" | |
92 | * in the lower right corner of the screen. | |
93 | */ | |
94 | static void | |
95 | con3270_update_status(struct con3270 *cp) | |
96 | { | |
97 | char *str; | |
98 | ||
99 | str = (cp->nr_up != 0) ? "History" : "Running"; | |
100 | memcpy(cp->status->string + 24, str, 7); | |
101 | codepage_convert(cp->view.ascebc, cp->status->string + 24, 7); | |
102 | cp->update_flags |= CON_UPDATE_STATUS; | |
103 | } | |
104 | ||
105 | static void | |
106 | con3270_create_status(struct con3270 *cp) | |
107 | { | |
108 | static const unsigned char blueprint[] = | |
109 | { TO_SBA, 0, 0, TO_SF,TF_LOG,TO_SA,TAT_COLOR, TAC_GREEN, | |
110 | 'c','o','n','s','o','l','e',' ','v','i','e','w', | |
111 | TO_RA,0,0,0,'R','u','n','n','i','n','g',TO_SF,TF_LOG }; | |
112 | ||
113 | cp->status = alloc_string(&cp->freemem, sizeof(blueprint)); | |
114 | /* Copy blueprint to status line */ | |
115 | memcpy(cp->status->string, blueprint, sizeof(blueprint)); | |
116 | /* Set TO_RA addresses. */ | |
117 | raw3270_buffer_address(cp->view.dev, cp->status->string + 1, | |
118 | cp->view.cols * (cp->view.rows - 1)); | |
119 | raw3270_buffer_address(cp->view.dev, cp->status->string + 21, | |
120 | cp->view.cols * cp->view.rows - 8); | |
121 | /* Convert strings to ebcdic. */ | |
122 | codepage_convert(cp->view.ascebc, cp->status->string + 8, 12); | |
123 | codepage_convert(cp->view.ascebc, cp->status->string + 24, 7); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Set output offsets to 3270 datastream fragment of a console string. | |
128 | */ | |
129 | static void | |
130 | con3270_update_string(struct con3270 *cp, struct string *s, int nr) | |
131 | { | |
132 | if (s->len >= cp->view.cols - 5) | |
133 | return; | |
134 | raw3270_buffer_address(cp->view.dev, s->string + s->len - 3, | |
135 | cp->view.cols * (nr + 1)); | |
136 | } | |
137 | ||
138 | /* | |
139 | * Rebuild update list to print all lines. | |
140 | */ | |
141 | static void | |
142 | con3270_rebuild_update(struct con3270 *cp) | |
143 | { | |
144 | struct string *s, *n; | |
145 | int nr; | |
146 | ||
147 | /* | |
148 | * Throw away update list and create a new one, | |
149 | * containing all lines that will fit on the screen. | |
150 | */ | |
151 | list_for_each_entry_safe(s, n, &cp->update, update) | |
152 | list_del_init(&s->update); | |
153 | nr = cp->view.rows - 2 + cp->nr_up; | |
154 | list_for_each_entry_reverse(s, &cp->lines, list) { | |
155 | if (nr < cp->view.rows - 1) | |
156 | list_add(&s->update, &cp->update); | |
157 | if (--nr < 0) | |
158 | break; | |
159 | } | |
160 | cp->line_nr = 0; | |
161 | cp->update_flags |= CON_UPDATE_LIST; | |
162 | } | |
163 | ||
164 | /* | |
165 | * Alloc string for size bytes. Free strings from history if necessary. | |
166 | */ | |
167 | static struct string * | |
168 | con3270_alloc_string(struct con3270 *cp, size_t size) | |
169 | { | |
170 | struct string *s, *n; | |
171 | ||
172 | s = alloc_string(&cp->freemem, size); | |
173 | if (s) | |
174 | return s; | |
175 | list_for_each_entry_safe(s, n, &cp->lines, list) { | |
176 | list_del(&s->list); | |
177 | if (!list_empty(&s->update)) | |
178 | list_del(&s->update); | |
179 | cp->nr_lines--; | |
180 | if (free_string(&cp->freemem, s) >= size) | |
181 | break; | |
182 | } | |
183 | s = alloc_string(&cp->freemem, size); | |
184 | BUG_ON(!s); | |
185 | if (cp->nr_up != 0 && cp->nr_up + cp->view.rows > cp->nr_lines) { | |
186 | cp->nr_up = cp->nr_lines - cp->view.rows + 1; | |
187 | con3270_rebuild_update(cp); | |
188 | con3270_update_status(cp); | |
189 | } | |
190 | return s; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Write completion callback. | |
195 | */ | |
196 | static void | |
197 | con3270_write_callback(struct raw3270_request *rq, void *data) | |
198 | { | |
199 | raw3270_request_reset(rq); | |
200 | xchg(&((struct con3270 *) rq->view)->write, rq); | |
201 | } | |
202 | ||
203 | /* | |
204 | * Update console display. | |
205 | */ | |
206 | static void | |
207 | con3270_update(struct con3270 *cp) | |
208 | { | |
209 | struct raw3270_request *wrq; | |
210 | char wcc, prolog[6]; | |
211 | unsigned long flags; | |
212 | unsigned long updated; | |
213 | struct string *s, *n; | |
214 | int rc; | |
215 | ||
ed3cb6f0 RH |
216 | if (cp->view.dev) |
217 | raw3270_activate_view(&cp->view); | |
218 | ||
1da177e4 LT |
219 | wrq = xchg(&cp->write, 0); |
220 | if (!wrq) { | |
221 | con3270_set_timer(cp, 1); | |
222 | return; | |
223 | } | |
224 | ||
225 | spin_lock_irqsave(&cp->view.lock, flags); | |
226 | updated = 0; | |
227 | if (cp->update_flags & CON_UPDATE_ERASE) { | |
228 | /* Use erase write alternate to initialize display. */ | |
229 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
230 | updated |= CON_UPDATE_ERASE; | |
231 | } else | |
232 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
233 | ||
234 | wcc = TW_NONE; | |
235 | raw3270_request_add_data(wrq, &wcc, 1); | |
236 | ||
237 | /* | |
238 | * Update status line. | |
239 | */ | |
240 | if (cp->update_flags & CON_UPDATE_STATUS) | |
241 | if (raw3270_request_add_data(wrq, cp->status->string, | |
242 | cp->status->len) == 0) | |
243 | updated |= CON_UPDATE_STATUS; | |
244 | ||
245 | if (cp->update_flags & CON_UPDATE_LIST) { | |
246 | prolog[0] = TO_SBA; | |
247 | prolog[3] = TO_SA; | |
248 | prolog[4] = TAT_COLOR; | |
249 | prolog[5] = TAC_TURQ; | |
250 | raw3270_buffer_address(cp->view.dev, prolog + 1, | |
251 | cp->view.cols * cp->line_nr); | |
252 | raw3270_request_add_data(wrq, prolog, 6); | |
253 | /* Write strings in the update list to the screen. */ | |
254 | list_for_each_entry_safe(s, n, &cp->update, update) { | |
255 | if (s != cp->cline) | |
256 | con3270_update_string(cp, s, cp->line_nr); | |
257 | if (raw3270_request_add_data(wrq, s->string, | |
258 | s->len) != 0) | |
259 | break; | |
260 | list_del_init(&s->update); | |
261 | if (s != cp->cline) | |
262 | cp->line_nr++; | |
263 | } | |
264 | if (list_empty(&cp->update)) | |
265 | updated |= CON_UPDATE_LIST; | |
266 | } | |
267 | wrq->callback = con3270_write_callback; | |
268 | rc = raw3270_start(&cp->view, wrq); | |
269 | if (rc == 0) { | |
270 | cp->update_flags &= ~updated; | |
271 | if (cp->update_flags) | |
272 | con3270_set_timer(cp, 1); | |
273 | } else { | |
274 | raw3270_request_reset(wrq); | |
275 | xchg(&cp->write, wrq); | |
276 | } | |
277 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
278 | } | |
279 | ||
280 | /* | |
281 | * Read tasklet. | |
282 | */ | |
283 | static void | |
284 | con3270_read_tasklet(struct raw3270_request *rrq) | |
285 | { | |
286 | static char kreset_data = TW_KR; | |
287 | struct con3270 *cp; | |
288 | unsigned long flags; | |
289 | int nr_up, deactivate; | |
290 | ||
291 | cp = (struct con3270 *) rrq->view; | |
292 | spin_lock_irqsave(&cp->view.lock, flags); | |
293 | nr_up = cp->nr_up; | |
294 | deactivate = 0; | |
295 | /* Check aid byte. */ | |
296 | switch (cp->input->string[0]) { | |
297 | case 0x7d: /* enter: jump to bottom. */ | |
298 | nr_up = 0; | |
299 | break; | |
300 | case 0xf3: /* PF3: deactivate the console view. */ | |
301 | deactivate = 1; | |
302 | break; | |
303 | case 0x6d: /* clear: start from scratch. */ | |
304 | con3270_rebuild_update(cp); | |
305 | cp->update_flags = CON_UPDATE_ALL; | |
306 | con3270_set_timer(cp, 1); | |
307 | break; | |
308 | case 0xf7: /* PF7: do a page up in the console log. */ | |
309 | nr_up += cp->view.rows - 2; | |
310 | if (nr_up + cp->view.rows - 1 > cp->nr_lines) { | |
311 | nr_up = cp->nr_lines - cp->view.rows + 1; | |
312 | if (nr_up < 0) | |
313 | nr_up = 0; | |
314 | } | |
315 | break; | |
316 | case 0xf8: /* PF8: do a page down in the console log. */ | |
317 | nr_up -= cp->view.rows - 2; | |
318 | if (nr_up < 0) | |
319 | nr_up = 0; | |
320 | break; | |
321 | } | |
322 | if (nr_up != cp->nr_up) { | |
323 | cp->nr_up = nr_up; | |
324 | con3270_rebuild_update(cp); | |
325 | con3270_update_status(cp); | |
326 | con3270_set_timer(cp, 1); | |
327 | } | |
328 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
329 | ||
330 | /* Start keyboard reset command. */ | |
331 | raw3270_request_reset(cp->kreset); | |
332 | raw3270_request_set_cmd(cp->kreset, TC_WRITE); | |
333 | raw3270_request_add_data(cp->kreset, &kreset_data, 1); | |
334 | raw3270_start(&cp->view, cp->kreset); | |
335 | ||
336 | if (deactivate) | |
337 | raw3270_deactivate_view(&cp->view); | |
338 | ||
339 | raw3270_request_reset(rrq); | |
340 | xchg(&cp->read, rrq); | |
341 | raw3270_put_view(&cp->view); | |
342 | } | |
343 | ||
344 | /* | |
345 | * Read request completion callback. | |
346 | */ | |
347 | static void | |
348 | con3270_read_callback(struct raw3270_request *rq, void *data) | |
349 | { | |
350 | raw3270_get_view(rq->view); | |
351 | /* Schedule tasklet to pass input to tty. */ | |
352 | tasklet_schedule(&((struct con3270 *) rq->view)->readlet); | |
353 | } | |
354 | ||
355 | /* | |
356 | * Issue a read request. Called only from interrupt function. | |
357 | */ | |
358 | static void | |
359 | con3270_issue_read(struct con3270 *cp) | |
360 | { | |
361 | struct raw3270_request *rrq; | |
362 | int rc; | |
363 | ||
364 | rrq = xchg(&cp->read, 0); | |
365 | if (!rrq) | |
366 | /* Read already scheduled. */ | |
367 | return; | |
368 | rrq->callback = con3270_read_callback; | |
369 | rrq->callback_data = cp; | |
370 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
371 | raw3270_request_set_data(rrq, cp->input->string, cp->input->len); | |
372 | /* Issue the read modified request. */ | |
373 | rc = raw3270_start_irq(&cp->view, rrq); | |
374 | if (rc) | |
375 | raw3270_request_reset(rrq); | |
376 | } | |
377 | ||
378 | /* | |
379 | * Switch to the console view. | |
380 | */ | |
381 | static int | |
382 | con3270_activate(struct raw3270_view *view) | |
383 | { | |
384 | unsigned long flags; | |
385 | struct con3270 *cp; | |
386 | ||
387 | cp = (struct con3270 *) view; | |
388 | spin_lock_irqsave(&cp->view.lock, flags); | |
389 | cp->nr_up = 0; | |
390 | con3270_rebuild_update(cp); | |
391 | con3270_update_status(cp); | |
392 | cp->update_flags = CON_UPDATE_ALL; | |
393 | con3270_set_timer(cp, 1); | |
394 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static void | |
399 | con3270_deactivate(struct raw3270_view *view) | |
400 | { | |
401 | unsigned long flags; | |
402 | struct con3270 *cp; | |
403 | ||
404 | cp = (struct con3270 *) view; | |
405 | spin_lock_irqsave(&cp->view.lock, flags); | |
406 | del_timer(&cp->timer); | |
407 | spin_unlock_irqrestore(&cp->view.lock, flags); | |
408 | } | |
409 | ||
410 | static int | |
411 | con3270_irq(struct con3270 *cp, struct raw3270_request *rq, struct irb *irb) | |
412 | { | |
413 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
414 | if (irb->scsw.dstat & DEV_STAT_ATTENTION) | |
415 | con3270_issue_read(cp); | |
416 | ||
417 | if (rq) { | |
418 | if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) | |
419 | rq->rc = -EIO; | |
420 | else | |
421 | /* Normal end. Copy residual count. */ | |
422 | rq->rescnt = irb->scsw.count; | |
423 | } | |
424 | return RAW3270_IO_DONE; | |
425 | } | |
426 | ||
427 | /* Console view to a 3270 device. */ | |
428 | static struct raw3270_fn con3270_fn = { | |
429 | .activate = con3270_activate, | |
430 | .deactivate = con3270_deactivate, | |
431 | .intv = (void *) con3270_irq | |
432 | }; | |
433 | ||
434 | static inline void | |
435 | con3270_cline_add(struct con3270 *cp) | |
436 | { | |
437 | if (!list_empty(&cp->cline->list)) | |
438 | /* Already added. */ | |
439 | return; | |
440 | list_add_tail(&cp->cline->list, &cp->lines); | |
441 | cp->nr_lines++; | |
442 | con3270_rebuild_update(cp); | |
443 | } | |
444 | ||
445 | static inline void | |
446 | con3270_cline_insert(struct con3270 *cp, unsigned char c) | |
447 | { | |
448 | cp->cline->string[cp->cline->len++] = | |
449 | cp->view.ascebc[(c < ' ') ? ' ' : c]; | |
450 | if (list_empty(&cp->cline->update)) { | |
451 | list_add_tail(&cp->cline->update, &cp->update); | |
452 | cp->update_flags |= CON_UPDATE_LIST; | |
453 | } | |
454 | } | |
455 | ||
456 | static inline void | |
457 | con3270_cline_end(struct con3270 *cp) | |
458 | { | |
459 | struct string *s; | |
460 | unsigned int size; | |
461 | ||
462 | /* Copy cline. */ | |
463 | size = (cp->cline->len < cp->view.cols - 5) ? | |
464 | cp->cline->len + 4 : cp->view.cols; | |
465 | s = con3270_alloc_string(cp, size); | |
466 | memcpy(s->string, cp->cline->string, cp->cline->len); | |
467 | if (s->len < cp->view.cols - 5) { | |
468 | s->string[s->len - 4] = TO_RA; | |
469 | s->string[s->len - 1] = 0; | |
470 | } else { | |
471 | while (--size > cp->cline->len) | |
472 | s->string[size] = cp->view.ascebc[' ']; | |
473 | } | |
474 | /* Replace cline with allocated line s and reset cline. */ | |
475 | list_add(&s->list, &cp->cline->list); | |
476 | list_del_init(&cp->cline->list); | |
477 | if (!list_empty(&cp->cline->update)) { | |
478 | list_add(&s->update, &cp->cline->update); | |
479 | list_del_init(&cp->cline->update); | |
480 | } | |
481 | cp->cline->len = 0; | |
482 | } | |
483 | ||
484 | /* | |
485 | * Write a string to the 3270 console | |
486 | */ | |
487 | static void | |
488 | con3270_write(struct console *co, const char *str, unsigned int count) | |
489 | { | |
490 | struct con3270 *cp; | |
491 | unsigned long flags; | |
492 | unsigned char c; | |
493 | ||
494 | cp = condev; | |
1da177e4 LT |
495 | spin_lock_irqsave(&cp->view.lock, flags); |
496 | while (count-- > 0) { | |
497 | c = *str++; | |
498 | if (cp->cline->len == 0) | |
499 | con3270_cline_add(cp); | |
500 | if (c != '\n') | |
501 | con3270_cline_insert(cp, c); | |
502 | if (c == '\n' || cp->cline->len >= cp->view.cols) | |
503 | con3270_cline_end(cp); | |
504 | } | |
505 | /* Setup timer to output current console buffer after 1/10 second */ | |
506 | if (cp->view.dev && !timer_pending(&cp->timer)) | |
507 | con3270_set_timer(cp, HZ/10); | |
508 | spin_unlock_irqrestore(&cp->view.lock,flags); | |
509 | } | |
510 | ||
1da177e4 LT |
511 | static struct tty_driver * |
512 | con3270_device(struct console *c, int *index) | |
513 | { | |
514 | *index = c->index; | |
515 | return tty3270_driver; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Wait for end of write request. | |
520 | */ | |
521 | static void | |
522 | con3270_wait_write(struct con3270 *cp) | |
523 | { | |
524 | while (!cp->write) { | |
525 | raw3270_wait_cons_dev(cp->view.dev); | |
526 | barrier(); | |
527 | } | |
528 | } | |
529 | ||
530 | /* | |
531 | * panic() calls console_unblank before the system enters a | |
532 | * disabled, endless loop. | |
533 | */ | |
534 | static void | |
535 | con3270_unblank(void) | |
536 | { | |
537 | struct con3270 *cp; | |
538 | unsigned long flags; | |
539 | ||
540 | cp = condev; | |
541 | if (!cp->view.dev) | |
542 | return; | |
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 | ||
1da177e4 LT |
557 | /* |
558 | * The console structure for the 3270 console | |
559 | */ | |
560 | static struct console con3270 = { | |
561 | .name = "tty3270", | |
562 | .write = con3270_write, | |
563 | .device = con3270_device, | |
564 | .unblank = con3270_unblank, | |
1da177e4 LT |
565 | .flags = CON_PRINTBUFFER, |
566 | }; | |
567 | ||
568 | /* | |
569 | * 3270 console initialization code called from console_init(). | |
570 | * NOTE: This is called before kmalloc is available. | |
571 | */ | |
572 | static int __init | |
573 | con3270_init(void) | |
574 | { | |
575 | struct ccw_device *cdev; | |
576 | struct raw3270 *rp; | |
577 | void *cbuf; | |
578 | int i; | |
579 | ||
580 | /* Check if 3270 is to be the console */ | |
581 | if (!CONSOLE_IS_3270) | |
582 | return -ENODEV; | |
583 | ||
584 | /* Set the console mode for VM */ | |
585 | if (MACHINE_IS_VM) { | |
6b979de3 CB |
586 | cpcmd("TERM CONMODE 3270", NULL, 0, NULL); |
587 | cpcmd("TERM AUTOCR OFF", NULL, 0, NULL); | |
1da177e4 LT |
588 | } |
589 | ||
590 | cdev = ccw_device_probe_console(); | |
600b5d16 | 591 | if (IS_ERR(cdev)) |
1da177e4 LT |
592 | return -ENODEV; |
593 | rp = raw3270_setup_console(cdev); | |
594 | if (IS_ERR(rp)) | |
595 | return PTR_ERR(rp); | |
596 | ||
597 | condev = (struct con3270 *) alloc_bootmem_low(sizeof(struct con3270)); | |
598 | memset(condev, 0, sizeof(struct con3270)); | |
599 | condev->view.dev = rp; | |
600 | ||
601 | condev->read = raw3270_request_alloc_bootmem(0); | |
602 | condev->read->callback = con3270_read_callback; | |
603 | condev->read->callback_data = condev; | |
604 | condev->write = | |
605 | raw3270_request_alloc_bootmem(CON3270_OUTPUT_BUFFER_SIZE); | |
606 | condev->kreset = raw3270_request_alloc_bootmem(1); | |
607 | ||
608 | INIT_LIST_HEAD(&condev->lines); | |
609 | INIT_LIST_HEAD(&condev->update); | |
610 | init_timer(&condev->timer); | |
611 | tasklet_init(&condev->readlet, | |
612 | (void (*)(unsigned long)) con3270_read_tasklet, | |
613 | (unsigned long) condev->read); | |
614 | ||
ed3cb6f0 | 615 | raw3270_add_view(&condev->view, &con3270_fn, 1); |
1da177e4 LT |
616 | |
617 | INIT_LIST_HEAD(&condev->freemem); | |
618 | for (i = 0; i < CON3270_STRING_PAGES; i++) { | |
619 | cbuf = (void *) alloc_bootmem_low_pages(PAGE_SIZE); | |
620 | add_string_memory(&condev->freemem, cbuf, PAGE_SIZE); | |
621 | } | |
622 | condev->cline = alloc_string(&condev->freemem, condev->view.cols); | |
623 | condev->cline->len = 0; | |
624 | con3270_create_status(condev); | |
625 | condev->input = alloc_string(&condev->freemem, 80); | |
626 | register_console(&con3270); | |
627 | return 0; | |
628 | } | |
629 | ||
630 | console_initcall(con3270_init); |