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Commit | Line | Data |
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6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
4b214a0c | 3 | * IBM/3270 Driver - fullscreen driver. |
1da177e4 | 4 | * |
4b214a0c MS |
5 | * Author(s): |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
9 | */ |
10 | ||
1da177e4 LT |
11 | #include <linux/bootmem.h> |
12 | #include <linux/console.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/interrupt.h> | |
048cd4e5 | 15 | #include <linux/compat.h> |
3f07c014 | 16 | #include <linux/sched/signal.h> |
3a4c5d59 | 17 | #include <linux/module.h> |
1da177e4 | 18 | #include <linux/list.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | ||
16e1a577 | 22 | #include <asm/compat.h> |
1da177e4 LT |
23 | #include <asm/ccwdev.h> |
24 | #include <asm/cio.h> | |
1da177e4 LT |
25 | #include <asm/ebcdic.h> |
26 | #include <asm/idals.h> | |
27 | ||
28 | #include "raw3270.h" | |
29 | #include "ctrlchar.h" | |
30 | ||
2b67fc46 | 31 | static struct raw3270_fn fs3270_fn; |
1da177e4 LT |
32 | |
33 | struct fs3270 { | |
34 | struct raw3270_view view; | |
782237a2 | 35 | struct pid *fs_pid; /* Pid of controlling program. */ |
1da177e4 LT |
36 | int read_command; /* ccw command to use for reads. */ |
37 | int write_command; /* ccw command to use for writes. */ | |
38 | int attention; /* Got attention. */ | |
ed3cb6f0 RH |
39 | int active; /* Fullscreen view is active. */ |
40 | struct raw3270_request *init; /* single init request. */ | |
41 | wait_queue_head_t wait; /* Init & attention wait queue. */ | |
42 | struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */ | |
43 | size_t rdbuf_size; /* size of data returned by RDBUF */ | |
1da177e4 LT |
44 | }; |
45 | ||
5cbb5f57 MS |
46 | static DEFINE_MUTEX(fs3270_mutex); |
47 | ||
1da177e4 LT |
48 | static void |
49 | fs3270_wake_up(struct raw3270_request *rq, void *data) | |
50 | { | |
51 | wake_up((wait_queue_head_t *) data); | |
52 | } | |
53 | ||
ed3cb6f0 RH |
54 | static inline int |
55 | fs3270_working(struct fs3270 *fp) | |
56 | { | |
57 | /* | |
58 | * The fullscreen view is in working order if the view | |
59 | * has been activated AND the initial request is finished. | |
60 | */ | |
61 | return fp->active && raw3270_request_final(fp->init); | |
62 | } | |
63 | ||
1da177e4 LT |
64 | static int |
65 | fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) | |
66 | { | |
ed3cb6f0 | 67 | struct fs3270 *fp; |
1da177e4 LT |
68 | int rc; |
69 | ||
ed3cb6f0 | 70 | fp = (struct fs3270 *) view; |
1da177e4 | 71 | rq->callback = fs3270_wake_up; |
ed3cb6f0 RH |
72 | rq->callback_data = &fp->wait; |
73 | ||
74 | do { | |
75 | if (!fs3270_working(fp)) { | |
76 | /* Fullscreen view isn't ready yet. */ | |
77 | rc = wait_event_interruptible(fp->wait, | |
78 | fs3270_working(fp)); | |
79 | if (rc != 0) | |
80 | break; | |
81 | } | |
82 | rc = raw3270_start(view, rq); | |
83 | if (rc == 0) { | |
af901ca1 | 84 | /* Started successfully. Now wait for completion. */ |
ed3cb6f0 RH |
85 | wait_event(fp->wait, raw3270_request_final(rq)); |
86 | } | |
87 | } while (rc == -EACCES); | |
88 | return rc; | |
1da177e4 LT |
89 | } |
90 | ||
ed3cb6f0 RH |
91 | /* |
92 | * Switch to the fullscreen view. | |
93 | */ | |
1da177e4 LT |
94 | static void |
95 | fs3270_reset_callback(struct raw3270_request *rq, void *data) | |
96 | { | |
ed3cb6f0 RH |
97 | struct fs3270 *fp; |
98 | ||
99 | fp = (struct fs3270 *) rq->view; | |
1da177e4 | 100 | raw3270_request_reset(rq); |
ed3cb6f0 RH |
101 | wake_up(&fp->wait); |
102 | } | |
103 | ||
104 | static void | |
105 | fs3270_restore_callback(struct raw3270_request *rq, void *data) | |
106 | { | |
107 | struct fs3270 *fp; | |
108 | ||
109 | fp = (struct fs3270 *) rq->view; | |
110 | if (rq->rc != 0 || rq->rescnt != 0) { | |
111 | if (fp->fs_pid) | |
782237a2 | 112 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
113 | } |
114 | fp->rdbuf_size = 0; | |
115 | raw3270_request_reset(rq); | |
116 | wake_up(&fp->wait); | |
1da177e4 LT |
117 | } |
118 | ||
1da177e4 LT |
119 | static int |
120 | fs3270_activate(struct raw3270_view *view) | |
121 | { | |
122 | struct fs3270 *fp; | |
ed3cb6f0 RH |
123 | char *cp; |
124 | int rc; | |
1da177e4 LT |
125 | |
126 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
127 | |
128 | /* If an old init command is still running just return. */ | |
129 | if (!raw3270_request_final(fp->init)) | |
130 | return 0; | |
131 | ||
132 | if (fp->rdbuf_size == 0) { | |
133 | /* No saved buffer. Just clear the screen. */ | |
134 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
135 | fp->init->callback = fs3270_reset_callback; | |
136 | } else { | |
137 | /* Restore fullscreen buffer saved by fs3270_deactivate. */ | |
138 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
139 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
140 | fp->init->ccw.count = fp->rdbuf_size; | |
141 | cp = fp->rdbuf->data[0]; | |
142 | cp[0] = TW_KR; | |
143 | cp[1] = TO_SBA; | |
144 | cp[2] = cp[6]; | |
145 | cp[3] = cp[7]; | |
146 | cp[4] = TO_IC; | |
147 | cp[5] = TO_SBA; | |
148 | cp[6] = 0x40; | |
149 | cp[7] = 0x40; | |
150 | fp->init->rescnt = 0; | |
151 | fp->init->callback = fs3270_restore_callback; | |
152 | } | |
153 | rc = fp->init->rc = raw3270_start_locked(view, fp->init); | |
154 | if (rc) | |
155 | fp->init->callback(fp->init, NULL); | |
156 | else | |
157 | fp->active = 1; | |
158 | return rc; | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * Shutdown fullscreen view. | |
163 | */ | |
ed3cb6f0 RH |
164 | static void |
165 | fs3270_save_callback(struct raw3270_request *rq, void *data) | |
166 | { | |
167 | struct fs3270 *fp; | |
168 | ||
169 | fp = (struct fs3270 *) rq->view; | |
170 | ||
171 | /* Correct idal buffer element 0 address. */ | |
172 | fp->rdbuf->data[0] -= 5; | |
173 | fp->rdbuf->size += 5; | |
174 | ||
175 | /* | |
176 | * If the rdbuf command failed or the idal buffer is | |
177 | * to small for the amount of data returned by the | |
178 | * rdbuf command, then we have no choice but to send | |
179 | * a SIGHUP to the application. | |
180 | */ | |
181 | if (rq->rc != 0 || rq->rescnt == 0) { | |
182 | if (fp->fs_pid) | |
782237a2 | 183 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
184 | fp->rdbuf_size = 0; |
185 | } else | |
186 | fp->rdbuf_size = fp->rdbuf->size - rq->rescnt; | |
187 | raw3270_request_reset(rq); | |
188 | wake_up(&fp->wait); | |
189 | } | |
190 | ||
1da177e4 LT |
191 | static void |
192 | fs3270_deactivate(struct raw3270_view *view) | |
193 | { | |
1da177e4 LT |
194 | struct fs3270 *fp; |
195 | ||
196 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
197 | fp->active = 0; |
198 | ||
199 | /* If an old init command is still running just return. */ | |
200 | if (!raw3270_request_final(fp->init)) | |
201 | return; | |
202 | ||
203 | /* Prepare read-buffer request. */ | |
204 | raw3270_request_set_cmd(fp->init, TC_RDBUF); | |
205 | /* | |
206 | * Hackish: skip first 5 bytes of the idal buffer to make | |
207 | * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence | |
208 | * in the activation command. | |
209 | */ | |
210 | fp->rdbuf->data[0] += 5; | |
211 | fp->rdbuf->size -= 5; | |
212 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
213 | fp->init->rescnt = 0; | |
214 | fp->init->callback = fs3270_save_callback; | |
215 | ||
216 | /* Start I/O to read in the 3270 buffer. */ | |
217 | fp->init->rc = raw3270_start_locked(view, fp->init); | |
218 | if (fp->init->rc) | |
219 | fp->init->callback(fp->init, NULL); | |
1da177e4 LT |
220 | } |
221 | ||
8340ab60 | 222 | static void |
1da177e4 LT |
223 | fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) |
224 | { | |
225 | /* Handle ATTN. Set indication and wake waiters for attention. */ | |
23d805b6 | 226 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 | 227 | fp->attention = 1; |
ed3cb6f0 | 228 | wake_up(&fp->wait); |
1da177e4 LT |
229 | } |
230 | ||
231 | if (rq) { | |
23d805b6 | 232 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
233 | rq->rc = -EIO; |
234 | else | |
235 | /* Normal end. Copy residual count. */ | |
23d805b6 | 236 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 | 237 | } |
1da177e4 LT |
238 | } |
239 | ||
240 | /* | |
241 | * Process reads from fullscreen 3270. | |
242 | */ | |
243 | static ssize_t | |
d2c993d8 | 244 | fs3270_read(struct file *filp, char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
245 | { |
246 | struct fs3270 *fp; | |
247 | struct raw3270_request *rq; | |
248 | struct idal_buffer *ib; | |
ed3cb6f0 | 249 | ssize_t rc; |
1da177e4 LT |
250 | |
251 | if (count == 0 || count > 65535) | |
252 | return -EINVAL; | |
253 | fp = filp->private_data; | |
254 | if (!fp) | |
255 | return -ENODEV; | |
256 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 257 | if (IS_ERR(ib)) |
1da177e4 LT |
258 | return -ENOMEM; |
259 | rq = raw3270_request_alloc(0); | |
260 | if (!IS_ERR(rq)) { | |
261 | if (fp->read_command == 0 && fp->write_command != 0) | |
262 | fp->read_command = 6; | |
263 | raw3270_request_set_cmd(rq, fp->read_command ? : 2); | |
264 | raw3270_request_set_idal(rq, ib); | |
ed3cb6f0 RH |
265 | rc = wait_event_interruptible(fp->wait, fp->attention); |
266 | fp->attention = 0; | |
267 | if (rc == 0) { | |
268 | rc = fs3270_do_io(&fp->view, rq); | |
269 | if (rc == 0) { | |
270 | count -= rq->rescnt; | |
271 | if (idal_buffer_to_user(ib, data, count) != 0) | |
272 | rc = -EFAULT; | |
273 | else | |
274 | rc = count; | |
275 | ||
276 | } | |
277 | } | |
1da177e4 LT |
278 | raw3270_request_free(rq); |
279 | } else | |
280 | rc = PTR_ERR(rq); | |
281 | idal_buffer_free(ib); | |
282 | return rc; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Process writes to fullscreen 3270. | |
287 | */ | |
288 | static ssize_t | |
d2c993d8 | 289 | fs3270_write(struct file *filp, const char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
290 | { |
291 | struct fs3270 *fp; | |
292 | struct raw3270_request *rq; | |
293 | struct idal_buffer *ib; | |
294 | int write_command; | |
ed3cb6f0 | 295 | ssize_t rc; |
1da177e4 LT |
296 | |
297 | fp = filp->private_data; | |
298 | if (!fp) | |
299 | return -ENODEV; | |
300 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 301 | if (IS_ERR(ib)) |
1da177e4 LT |
302 | return -ENOMEM; |
303 | rq = raw3270_request_alloc(0); | |
304 | if (!IS_ERR(rq)) { | |
305 | if (idal_buffer_from_user(ib, data, count) == 0) { | |
306 | write_command = fp->write_command ? : 1; | |
307 | if (write_command == 5) | |
308 | write_command = 13; | |
309 | raw3270_request_set_cmd(rq, write_command); | |
310 | raw3270_request_set_idal(rq, ib); | |
311 | rc = fs3270_do_io(&fp->view, rq); | |
ed3cb6f0 RH |
312 | if (rc == 0) |
313 | rc = count - rq->rescnt; | |
1da177e4 LT |
314 | } else |
315 | rc = -EFAULT; | |
316 | raw3270_request_free(rq); | |
317 | } else | |
318 | rc = PTR_ERR(rq); | |
319 | idal_buffer_free(ib); | |
320 | return rc; | |
321 | } | |
322 | ||
323 | /* | |
324 | * process ioctl commands for the tube driver | |
325 | */ | |
0f75e00c CH |
326 | static long |
327 | fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 328 | { |
16e1a577 | 329 | char __user *argp; |
1da177e4 LT |
330 | struct fs3270 *fp; |
331 | struct raw3270_iocb iocb; | |
332 | int rc; | |
333 | ||
334 | fp = filp->private_data; | |
335 | if (!fp) | |
336 | return -ENODEV; | |
16e1a577 HC |
337 | if (is_compat_task()) |
338 | argp = compat_ptr(arg); | |
339 | else | |
340 | argp = (char __user *)arg; | |
1da177e4 | 341 | rc = 0; |
5cbb5f57 | 342 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
343 | switch (cmd) { |
344 | case TUBICMD: | |
345 | fp->read_command = arg; | |
346 | break; | |
347 | case TUBOCMD: | |
348 | fp->write_command = arg; | |
349 | break; | |
350 | case TUBGETI: | |
16e1a577 | 351 | rc = put_user(fp->read_command, argp); |
1da177e4 LT |
352 | break; |
353 | case TUBGETO: | |
16e1a577 | 354 | rc = put_user(fp->write_command, argp); |
1da177e4 LT |
355 | break; |
356 | case TUBGETMOD: | |
357 | iocb.model = fp->view.model; | |
358 | iocb.line_cnt = fp->view.rows; | |
359 | iocb.col_cnt = fp->view.cols; | |
360 | iocb.pf_cnt = 24; | |
361 | iocb.re_cnt = 20; | |
362 | iocb.map = 0; | |
16e1a577 | 363 | if (copy_to_user(argp, &iocb, sizeof(struct raw3270_iocb))) |
1da177e4 LT |
364 | rc = -EFAULT; |
365 | break; | |
366 | } | |
5cbb5f57 | 367 | mutex_unlock(&fs3270_mutex); |
1da177e4 LT |
368 | return rc; |
369 | } | |
370 | ||
371 | /* | |
ed3cb6f0 | 372 | * Allocate fs3270 structure. |
1da177e4 LT |
373 | */ |
374 | static struct fs3270 * | |
375 | fs3270_alloc_view(void) | |
376 | { | |
377 | struct fs3270 *fp; | |
378 | ||
88abaab4 | 379 | fp = kzalloc(sizeof(struct fs3270),GFP_KERNEL); |
1da177e4 LT |
380 | if (!fp) |
381 | return ERR_PTR(-ENOMEM); | |
ed3cb6f0 RH |
382 | fp->init = raw3270_request_alloc(0); |
383 | if (IS_ERR(fp->init)) { | |
1da177e4 LT |
384 | kfree(fp); |
385 | return ERR_PTR(-ENOMEM); | |
386 | } | |
387 | return fp; | |
388 | } | |
389 | ||
390 | /* | |
ed3cb6f0 | 391 | * Free fs3270 structure. |
1da177e4 LT |
392 | */ |
393 | static void | |
394 | fs3270_free_view(struct raw3270_view *view) | |
395 | { | |
ed3cb6f0 RH |
396 | struct fs3270 *fp; |
397 | ||
398 | fp = (struct fs3270 *) view; | |
399 | if (fp->rdbuf) | |
400 | idal_buffer_free(fp->rdbuf); | |
401 | raw3270_request_free(((struct fs3270 *) view)->init); | |
1da177e4 LT |
402 | kfree(view); |
403 | } | |
404 | ||
405 | /* | |
406 | * Unlink fs3270 data structure from filp. | |
407 | */ | |
408 | static void | |
409 | fs3270_release(struct raw3270_view *view) | |
410 | { | |
4b214a0c MS |
411 | struct fs3270 *fp; |
412 | ||
413 | fp = (struct fs3270 *) view; | |
414 | if (fp->fs_pid) | |
415 | kill_pid(fp->fs_pid, SIGHUP, 1); | |
1da177e4 LT |
416 | } |
417 | ||
418 | /* View to a 3270 device. Can be console, tty or fullscreen. */ | |
2b67fc46 | 419 | static struct raw3270_fn fs3270_fn = { |
1da177e4 LT |
420 | .activate = fs3270_activate, |
421 | .deactivate = fs3270_deactivate, | |
422 | .intv = (void *) fs3270_irq, | |
423 | .release = fs3270_release, | |
424 | .free = fs3270_free_view | |
425 | }; | |
426 | ||
427 | /* | |
428 | * This routine is called whenever a 3270 fullscreen device is opened. | |
429 | */ | |
430 | static int | |
431 | fs3270_open(struct inode *inode, struct file *filp) | |
432 | { | |
433 | struct fs3270 *fp; | |
ed3cb6f0 | 434 | struct idal_buffer *ib; |
a18992d4 | 435 | int minor, rc = 0; |
1da177e4 | 436 | |
496ad9aa | 437 | if (imajor(file_inode(filp)) != IBM_FS3270_MAJOR) |
1da177e4 | 438 | return -ENODEV; |
496ad9aa | 439 | minor = iminor(file_inode(filp)); |
ed3cb6f0 RH |
440 | /* Check for minor 0 multiplexer. */ |
441 | if (minor == 0) { | |
a90610e5 | 442 | struct tty_struct *tty = get_current_tty(); |
24ec839c | 443 | if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { |
452a00d2 | 444 | tty_kref_put(tty); |
a18992d4 | 445 | return -ENODEV; |
24ec839c | 446 | } |
c95571e6 | 447 | minor = tty->index; |
452a00d2 | 448 | tty_kref_put(tty); |
ed3cb6f0 | 449 | } |
5cbb5f57 | 450 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
451 | /* Check if some other program is already using fullscreen mode. */ |
452 | fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); | |
453 | if (!IS_ERR(fp)) { | |
454 | raw3270_put_view(&fp->view); | |
764a4a8e JC |
455 | rc = -EBUSY; |
456 | goto out; | |
1da177e4 LT |
457 | } |
458 | /* Allocate fullscreen view structure. */ | |
459 | fp = fs3270_alloc_view(); | |
764a4a8e JC |
460 | if (IS_ERR(fp)) { |
461 | rc = PTR_ERR(fp); | |
462 | goto out; | |
463 | } | |
1da177e4 | 464 | |
ed3cb6f0 | 465 | init_waitqueue_head(&fp->wait); |
782237a2 | 466 | fp->fs_pid = get_pid(task_pid(current)); |
1da177e4 LT |
467 | rc = raw3270_add_view(&fp->view, &fs3270_fn, minor); |
468 | if (rc) { | |
469 | fs3270_free_view(&fp->view); | |
764a4a8e | 470 | goto out; |
1da177e4 LT |
471 | } |
472 | ||
ed3cb6f0 RH |
473 | /* Allocate idal-buffer. */ |
474 | ib = idal_buffer_alloc(2*fp->view.rows*fp->view.cols + 5, 0); | |
475 | if (IS_ERR(ib)) { | |
476 | raw3270_put_view(&fp->view); | |
477 | raw3270_del_view(&fp->view); | |
2b31001d | 478 | rc = PTR_ERR(ib); |
764a4a8e | 479 | goto out; |
ed3cb6f0 RH |
480 | } |
481 | fp->rdbuf = ib; | |
482 | ||
1da177e4 LT |
483 | rc = raw3270_activate_view(&fp->view); |
484 | if (rc) { | |
ed3cb6f0 | 485 | raw3270_put_view(&fp->view); |
1da177e4 | 486 | raw3270_del_view(&fp->view); |
764a4a8e | 487 | goto out; |
1da177e4 | 488 | } |
58ea91c0 | 489 | nonseekable_open(inode, filp); |
1da177e4 | 490 | filp->private_data = fp; |
764a4a8e | 491 | out: |
5cbb5f57 | 492 | mutex_unlock(&fs3270_mutex); |
a18992d4 | 493 | return rc; |
1da177e4 LT |
494 | } |
495 | ||
496 | /* | |
497 | * This routine is called when the 3270 tty is closed. We wait | |
498 | * for the remaining request to be completed. Then we clean up. | |
499 | */ | |
500 | static int | |
501 | fs3270_close(struct inode *inode, struct file *filp) | |
502 | { | |
503 | struct fs3270 *fp; | |
504 | ||
505 | fp = filp->private_data; | |
d2c993d8 | 506 | filp->private_data = NULL; |
ed3cb6f0 | 507 | if (fp) { |
782237a2 CLG |
508 | put_pid(fp->fs_pid); |
509 | fp->fs_pid = NULL; | |
ed3cb6f0 RH |
510 | raw3270_reset(&fp->view); |
511 | raw3270_put_view(&fp->view); | |
1da177e4 | 512 | raw3270_del_view(&fp->view); |
ed3cb6f0 | 513 | } |
1da177e4 LT |
514 | return 0; |
515 | } | |
516 | ||
d54b1fdb | 517 | static const struct file_operations fs3270_fops = { |
0f75e00c CH |
518 | .owner = THIS_MODULE, /* owner */ |
519 | .read = fs3270_read, /* read */ | |
520 | .write = fs3270_write, /* write */ | |
521 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ | |
522 | .compat_ioctl = fs3270_ioctl, /* ioctl */ | |
16e1a577 HC |
523 | .open = fs3270_open, /* open */ |
524 | .release = fs3270_close, /* release */ | |
6038f373 | 525 | .llseek = no_llseek, |
1da177e4 LT |
526 | }; |
527 | ||
63df41d6 | 528 | static void fs3270_create_cb(int minor) |
c95571e6 MS |
529 | { |
530 | __register_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub", &fs3270_fops); | |
531 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor), | |
532 | NULL, "3270/tub%d", minor); | |
533 | } | |
534 | ||
63df41d6 | 535 | static void fs3270_destroy_cb(int minor) |
c95571e6 MS |
536 | { |
537 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, minor)); | |
538 | __unregister_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub"); | |
539 | } | |
540 | ||
63df41d6 | 541 | static struct raw3270_notifier fs3270_notifier = |
c95571e6 MS |
542 | { |
543 | .create = fs3270_create_cb, | |
544 | .destroy = fs3270_destroy_cb, | |
545 | }; | |
546 | ||
1da177e4 LT |
547 | /* |
548 | * 3270 fullscreen driver initialization. | |
549 | */ | |
550 | static int __init | |
551 | fs3270_init(void) | |
552 | { | |
553 | int rc; | |
554 | ||
c95571e6 | 555 | rc = __register_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270", &fs3270_fops); |
a26182ed | 556 | if (rc) |
1da177e4 | 557 | return rc; |
c95571e6 MS |
558 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0), |
559 | NULL, "3270/tub"); | |
560 | raw3270_register_notifier(&fs3270_notifier); | |
1da177e4 LT |
561 | return 0; |
562 | } | |
563 | ||
564 | static void __exit | |
565 | fs3270_exit(void) | |
566 | { | |
c95571e6 | 567 | raw3270_unregister_notifier(&fs3270_notifier); |
d1e61fe4 | 568 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, 0)); |
c95571e6 | 569 | __unregister_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270"); |
1da177e4 LT |
570 | } |
571 | ||
572 | MODULE_LICENSE("GPL"); | |
573 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); | |
574 | ||
575 | module_init(fs3270_init); | |
576 | module_exit(fs3270_exit); |