Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4b214a0c | 2 | * IBM/3270 Driver - fullscreen driver. |
1da177e4 | 3 | * |
4b214a0c MS |
4 | * Author(s): |
5 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
6 | * Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Copyright IBM Corp. 2003, 2009 | |
1da177e4 LT |
8 | */ |
9 | ||
1da177e4 LT |
10 | #include <linux/bootmem.h> |
11 | #include <linux/console.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/interrupt.h> | |
048cd4e5 | 14 | #include <linux/compat.h> |
3a4c5d59 | 15 | #include <linux/module.h> |
1da177e4 | 16 | #include <linux/list.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/types.h> |
19 | ||
16e1a577 | 20 | #include <asm/compat.h> |
1da177e4 LT |
21 | #include <asm/ccwdev.h> |
22 | #include <asm/cio.h> | |
1da177e4 LT |
23 | #include <asm/ebcdic.h> |
24 | #include <asm/idals.h> | |
25 | ||
26 | #include "raw3270.h" | |
27 | #include "ctrlchar.h" | |
28 | ||
2b67fc46 | 29 | static struct raw3270_fn fs3270_fn; |
1da177e4 LT |
30 | |
31 | struct fs3270 { | |
32 | struct raw3270_view view; | |
782237a2 | 33 | struct pid *fs_pid; /* Pid of controlling program. */ |
1da177e4 LT |
34 | int read_command; /* ccw command to use for reads. */ |
35 | int write_command; /* ccw command to use for writes. */ | |
36 | int attention; /* Got attention. */ | |
ed3cb6f0 RH |
37 | int active; /* Fullscreen view is active. */ |
38 | struct raw3270_request *init; /* single init request. */ | |
39 | wait_queue_head_t wait; /* Init & attention wait queue. */ | |
40 | struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */ | |
41 | size_t rdbuf_size; /* size of data returned by RDBUF */ | |
1da177e4 LT |
42 | }; |
43 | ||
5cbb5f57 MS |
44 | static DEFINE_MUTEX(fs3270_mutex); |
45 | ||
1da177e4 LT |
46 | static void |
47 | fs3270_wake_up(struct raw3270_request *rq, void *data) | |
48 | { | |
49 | wake_up((wait_queue_head_t *) data); | |
50 | } | |
51 | ||
ed3cb6f0 RH |
52 | static inline int |
53 | fs3270_working(struct fs3270 *fp) | |
54 | { | |
55 | /* | |
56 | * The fullscreen view is in working order if the view | |
57 | * has been activated AND the initial request is finished. | |
58 | */ | |
59 | return fp->active && raw3270_request_final(fp->init); | |
60 | } | |
61 | ||
1da177e4 LT |
62 | static int |
63 | fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) | |
64 | { | |
ed3cb6f0 | 65 | struct fs3270 *fp; |
1da177e4 LT |
66 | int rc; |
67 | ||
ed3cb6f0 | 68 | fp = (struct fs3270 *) view; |
1da177e4 | 69 | rq->callback = fs3270_wake_up; |
ed3cb6f0 RH |
70 | rq->callback_data = &fp->wait; |
71 | ||
72 | do { | |
73 | if (!fs3270_working(fp)) { | |
74 | /* Fullscreen view isn't ready yet. */ | |
75 | rc = wait_event_interruptible(fp->wait, | |
76 | fs3270_working(fp)); | |
77 | if (rc != 0) | |
78 | break; | |
79 | } | |
80 | rc = raw3270_start(view, rq); | |
81 | if (rc == 0) { | |
af901ca1 | 82 | /* Started successfully. Now wait for completion. */ |
ed3cb6f0 RH |
83 | wait_event(fp->wait, raw3270_request_final(rq)); |
84 | } | |
85 | } while (rc == -EACCES); | |
86 | return rc; | |
1da177e4 LT |
87 | } |
88 | ||
ed3cb6f0 RH |
89 | /* |
90 | * Switch to the fullscreen view. | |
91 | */ | |
1da177e4 LT |
92 | static void |
93 | fs3270_reset_callback(struct raw3270_request *rq, void *data) | |
94 | { | |
ed3cb6f0 RH |
95 | struct fs3270 *fp; |
96 | ||
97 | fp = (struct fs3270 *) rq->view; | |
1da177e4 | 98 | raw3270_request_reset(rq); |
ed3cb6f0 RH |
99 | wake_up(&fp->wait); |
100 | } | |
101 | ||
102 | static void | |
103 | fs3270_restore_callback(struct raw3270_request *rq, void *data) | |
104 | { | |
105 | struct fs3270 *fp; | |
106 | ||
107 | fp = (struct fs3270 *) rq->view; | |
108 | if (rq->rc != 0 || rq->rescnt != 0) { | |
109 | if (fp->fs_pid) | |
782237a2 | 110 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
111 | } |
112 | fp->rdbuf_size = 0; | |
113 | raw3270_request_reset(rq); | |
114 | wake_up(&fp->wait); | |
1da177e4 LT |
115 | } |
116 | ||
1da177e4 LT |
117 | static int |
118 | fs3270_activate(struct raw3270_view *view) | |
119 | { | |
120 | struct fs3270 *fp; | |
ed3cb6f0 RH |
121 | char *cp; |
122 | int rc; | |
1da177e4 LT |
123 | |
124 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
125 | |
126 | /* If an old init command is still running just return. */ | |
127 | if (!raw3270_request_final(fp->init)) | |
128 | return 0; | |
129 | ||
130 | if (fp->rdbuf_size == 0) { | |
131 | /* No saved buffer. Just clear the screen. */ | |
132 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
133 | fp->init->callback = fs3270_reset_callback; | |
134 | } else { | |
135 | /* Restore fullscreen buffer saved by fs3270_deactivate. */ | |
136 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
137 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
138 | fp->init->ccw.count = fp->rdbuf_size; | |
139 | cp = fp->rdbuf->data[0]; | |
140 | cp[0] = TW_KR; | |
141 | cp[1] = TO_SBA; | |
142 | cp[2] = cp[6]; | |
143 | cp[3] = cp[7]; | |
144 | cp[4] = TO_IC; | |
145 | cp[5] = TO_SBA; | |
146 | cp[6] = 0x40; | |
147 | cp[7] = 0x40; | |
148 | fp->init->rescnt = 0; | |
149 | fp->init->callback = fs3270_restore_callback; | |
150 | } | |
151 | rc = fp->init->rc = raw3270_start_locked(view, fp->init); | |
152 | if (rc) | |
153 | fp->init->callback(fp->init, NULL); | |
154 | else | |
155 | fp->active = 1; | |
156 | return rc; | |
1da177e4 LT |
157 | } |
158 | ||
159 | /* | |
160 | * Shutdown fullscreen view. | |
161 | */ | |
ed3cb6f0 RH |
162 | static void |
163 | fs3270_save_callback(struct raw3270_request *rq, void *data) | |
164 | { | |
165 | struct fs3270 *fp; | |
166 | ||
167 | fp = (struct fs3270 *) rq->view; | |
168 | ||
169 | /* Correct idal buffer element 0 address. */ | |
170 | fp->rdbuf->data[0] -= 5; | |
171 | fp->rdbuf->size += 5; | |
172 | ||
173 | /* | |
174 | * If the rdbuf command failed or the idal buffer is | |
175 | * to small for the amount of data returned by the | |
176 | * rdbuf command, then we have no choice but to send | |
177 | * a SIGHUP to the application. | |
178 | */ | |
179 | if (rq->rc != 0 || rq->rescnt == 0) { | |
180 | if (fp->fs_pid) | |
782237a2 | 181 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
182 | fp->rdbuf_size = 0; |
183 | } else | |
184 | fp->rdbuf_size = fp->rdbuf->size - rq->rescnt; | |
185 | raw3270_request_reset(rq); | |
186 | wake_up(&fp->wait); | |
187 | } | |
188 | ||
1da177e4 LT |
189 | static void |
190 | fs3270_deactivate(struct raw3270_view *view) | |
191 | { | |
1da177e4 LT |
192 | struct fs3270 *fp; |
193 | ||
194 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
195 | fp->active = 0; |
196 | ||
197 | /* If an old init command is still running just return. */ | |
198 | if (!raw3270_request_final(fp->init)) | |
199 | return; | |
200 | ||
201 | /* Prepare read-buffer request. */ | |
202 | raw3270_request_set_cmd(fp->init, TC_RDBUF); | |
203 | /* | |
204 | * Hackish: skip first 5 bytes of the idal buffer to make | |
205 | * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence | |
206 | * in the activation command. | |
207 | */ | |
208 | fp->rdbuf->data[0] += 5; | |
209 | fp->rdbuf->size -= 5; | |
210 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
211 | fp->init->rescnt = 0; | |
212 | fp->init->callback = fs3270_save_callback; | |
213 | ||
214 | /* Start I/O to read in the 3270 buffer. */ | |
215 | fp->init->rc = raw3270_start_locked(view, fp->init); | |
216 | if (fp->init->rc) | |
217 | fp->init->callback(fp->init, NULL); | |
1da177e4 LT |
218 | } |
219 | ||
220 | static int | |
221 | fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) | |
222 | { | |
223 | /* Handle ATTN. Set indication and wake waiters for attention. */ | |
23d805b6 | 224 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 | 225 | fp->attention = 1; |
ed3cb6f0 | 226 | wake_up(&fp->wait); |
1da177e4 LT |
227 | } |
228 | ||
229 | if (rq) { | |
23d805b6 | 230 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
231 | rq->rc = -EIO; |
232 | else | |
233 | /* Normal end. Copy residual count. */ | |
23d805b6 | 234 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 LT |
235 | } |
236 | return RAW3270_IO_DONE; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Process reads from fullscreen 3270. | |
241 | */ | |
242 | static ssize_t | |
d2c993d8 | 243 | fs3270_read(struct file *filp, char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
244 | { |
245 | struct fs3270 *fp; | |
246 | struct raw3270_request *rq; | |
247 | struct idal_buffer *ib; | |
ed3cb6f0 | 248 | ssize_t rc; |
1da177e4 LT |
249 | |
250 | if (count == 0 || count > 65535) | |
251 | return -EINVAL; | |
252 | fp = filp->private_data; | |
253 | if (!fp) | |
254 | return -ENODEV; | |
255 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 256 | if (IS_ERR(ib)) |
1da177e4 LT |
257 | return -ENOMEM; |
258 | rq = raw3270_request_alloc(0); | |
259 | if (!IS_ERR(rq)) { | |
260 | if (fp->read_command == 0 && fp->write_command != 0) | |
261 | fp->read_command = 6; | |
262 | raw3270_request_set_cmd(rq, fp->read_command ? : 2); | |
263 | raw3270_request_set_idal(rq, ib); | |
ed3cb6f0 RH |
264 | rc = wait_event_interruptible(fp->wait, fp->attention); |
265 | fp->attention = 0; | |
266 | if (rc == 0) { | |
267 | rc = fs3270_do_io(&fp->view, rq); | |
268 | if (rc == 0) { | |
269 | count -= rq->rescnt; | |
270 | if (idal_buffer_to_user(ib, data, count) != 0) | |
271 | rc = -EFAULT; | |
272 | else | |
273 | rc = count; | |
274 | ||
275 | } | |
276 | } | |
1da177e4 LT |
277 | raw3270_request_free(rq); |
278 | } else | |
279 | rc = PTR_ERR(rq); | |
280 | idal_buffer_free(ib); | |
281 | return rc; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Process writes to fullscreen 3270. | |
286 | */ | |
287 | static ssize_t | |
d2c993d8 | 288 | fs3270_write(struct file *filp, const char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
289 | { |
290 | struct fs3270 *fp; | |
291 | struct raw3270_request *rq; | |
292 | struct idal_buffer *ib; | |
293 | int write_command; | |
ed3cb6f0 | 294 | ssize_t rc; |
1da177e4 LT |
295 | |
296 | fp = filp->private_data; | |
297 | if (!fp) | |
298 | return -ENODEV; | |
299 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 300 | if (IS_ERR(ib)) |
1da177e4 LT |
301 | return -ENOMEM; |
302 | rq = raw3270_request_alloc(0); | |
303 | if (!IS_ERR(rq)) { | |
304 | if (idal_buffer_from_user(ib, data, count) == 0) { | |
305 | write_command = fp->write_command ? : 1; | |
306 | if (write_command == 5) | |
307 | write_command = 13; | |
308 | raw3270_request_set_cmd(rq, write_command); | |
309 | raw3270_request_set_idal(rq, ib); | |
310 | rc = fs3270_do_io(&fp->view, rq); | |
ed3cb6f0 RH |
311 | if (rc == 0) |
312 | rc = count - rq->rescnt; | |
1da177e4 LT |
313 | } else |
314 | rc = -EFAULT; | |
315 | raw3270_request_free(rq); | |
316 | } else | |
317 | rc = PTR_ERR(rq); | |
318 | idal_buffer_free(ib); | |
319 | return rc; | |
320 | } | |
321 | ||
322 | /* | |
323 | * process ioctl commands for the tube driver | |
324 | */ | |
0f75e00c CH |
325 | static long |
326 | fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 327 | { |
16e1a577 | 328 | char __user *argp; |
1da177e4 LT |
329 | struct fs3270 *fp; |
330 | struct raw3270_iocb iocb; | |
331 | int rc; | |
332 | ||
333 | fp = filp->private_data; | |
334 | if (!fp) | |
335 | return -ENODEV; | |
16e1a577 HC |
336 | if (is_compat_task()) |
337 | argp = compat_ptr(arg); | |
338 | else | |
339 | argp = (char __user *)arg; | |
1da177e4 | 340 | rc = 0; |
5cbb5f57 | 341 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
342 | switch (cmd) { |
343 | case TUBICMD: | |
344 | fp->read_command = arg; | |
345 | break; | |
346 | case TUBOCMD: | |
347 | fp->write_command = arg; | |
348 | break; | |
349 | case TUBGETI: | |
16e1a577 | 350 | rc = put_user(fp->read_command, argp); |
1da177e4 LT |
351 | break; |
352 | case TUBGETO: | |
16e1a577 | 353 | rc = put_user(fp->write_command, argp); |
1da177e4 LT |
354 | break; |
355 | case TUBGETMOD: | |
356 | iocb.model = fp->view.model; | |
357 | iocb.line_cnt = fp->view.rows; | |
358 | iocb.col_cnt = fp->view.cols; | |
359 | iocb.pf_cnt = 24; | |
360 | iocb.re_cnt = 20; | |
361 | iocb.map = 0; | |
16e1a577 | 362 | if (copy_to_user(argp, &iocb, sizeof(struct raw3270_iocb))) |
1da177e4 LT |
363 | rc = -EFAULT; |
364 | break; | |
365 | } | |
5cbb5f57 | 366 | mutex_unlock(&fs3270_mutex); |
1da177e4 LT |
367 | return rc; |
368 | } | |
369 | ||
370 | /* | |
ed3cb6f0 | 371 | * Allocate fs3270 structure. |
1da177e4 LT |
372 | */ |
373 | static struct fs3270 * | |
374 | fs3270_alloc_view(void) | |
375 | { | |
376 | struct fs3270 *fp; | |
377 | ||
88abaab4 | 378 | fp = kzalloc(sizeof(struct fs3270),GFP_KERNEL); |
1da177e4 LT |
379 | if (!fp) |
380 | return ERR_PTR(-ENOMEM); | |
ed3cb6f0 RH |
381 | fp->init = raw3270_request_alloc(0); |
382 | if (IS_ERR(fp->init)) { | |
1da177e4 LT |
383 | kfree(fp); |
384 | return ERR_PTR(-ENOMEM); | |
385 | } | |
386 | return fp; | |
387 | } | |
388 | ||
389 | /* | |
ed3cb6f0 | 390 | * Free fs3270 structure. |
1da177e4 LT |
391 | */ |
392 | static void | |
393 | fs3270_free_view(struct raw3270_view *view) | |
394 | { | |
ed3cb6f0 RH |
395 | struct fs3270 *fp; |
396 | ||
397 | fp = (struct fs3270 *) view; | |
398 | if (fp->rdbuf) | |
399 | idal_buffer_free(fp->rdbuf); | |
400 | raw3270_request_free(((struct fs3270 *) view)->init); | |
1da177e4 LT |
401 | kfree(view); |
402 | } | |
403 | ||
404 | /* | |
405 | * Unlink fs3270 data structure from filp. | |
406 | */ | |
407 | static void | |
408 | fs3270_release(struct raw3270_view *view) | |
409 | { | |
4b214a0c MS |
410 | struct fs3270 *fp; |
411 | ||
412 | fp = (struct fs3270 *) view; | |
413 | if (fp->fs_pid) | |
414 | kill_pid(fp->fs_pid, SIGHUP, 1); | |
1da177e4 LT |
415 | } |
416 | ||
417 | /* View to a 3270 device. Can be console, tty or fullscreen. */ | |
2b67fc46 | 418 | static struct raw3270_fn fs3270_fn = { |
1da177e4 LT |
419 | .activate = fs3270_activate, |
420 | .deactivate = fs3270_deactivate, | |
421 | .intv = (void *) fs3270_irq, | |
422 | .release = fs3270_release, | |
423 | .free = fs3270_free_view | |
424 | }; | |
425 | ||
426 | /* | |
427 | * This routine is called whenever a 3270 fullscreen device is opened. | |
428 | */ | |
429 | static int | |
430 | fs3270_open(struct inode *inode, struct file *filp) | |
431 | { | |
432 | struct fs3270 *fp; | |
ed3cb6f0 | 433 | struct idal_buffer *ib; |
a18992d4 | 434 | int minor, rc = 0; |
1da177e4 | 435 | |
496ad9aa | 436 | if (imajor(file_inode(filp)) != IBM_FS3270_MAJOR) |
1da177e4 | 437 | return -ENODEV; |
496ad9aa | 438 | minor = iminor(file_inode(filp)); |
ed3cb6f0 RH |
439 | /* Check for minor 0 multiplexer. */ |
440 | if (minor == 0) { | |
a90610e5 | 441 | struct tty_struct *tty = get_current_tty(); |
24ec839c | 442 | if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { |
452a00d2 | 443 | tty_kref_put(tty); |
a18992d4 | 444 | return -ENODEV; |
24ec839c | 445 | } |
c95571e6 | 446 | minor = tty->index; |
452a00d2 | 447 | tty_kref_put(tty); |
ed3cb6f0 | 448 | } |
5cbb5f57 | 449 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
450 | /* Check if some other program is already using fullscreen mode. */ |
451 | fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); | |
452 | if (!IS_ERR(fp)) { | |
453 | raw3270_put_view(&fp->view); | |
764a4a8e JC |
454 | rc = -EBUSY; |
455 | goto out; | |
1da177e4 LT |
456 | } |
457 | /* Allocate fullscreen view structure. */ | |
458 | fp = fs3270_alloc_view(); | |
764a4a8e JC |
459 | if (IS_ERR(fp)) { |
460 | rc = PTR_ERR(fp); | |
461 | goto out; | |
462 | } | |
1da177e4 | 463 | |
ed3cb6f0 | 464 | init_waitqueue_head(&fp->wait); |
782237a2 | 465 | fp->fs_pid = get_pid(task_pid(current)); |
1da177e4 LT |
466 | rc = raw3270_add_view(&fp->view, &fs3270_fn, minor); |
467 | if (rc) { | |
468 | fs3270_free_view(&fp->view); | |
764a4a8e | 469 | goto out; |
1da177e4 LT |
470 | } |
471 | ||
ed3cb6f0 RH |
472 | /* Allocate idal-buffer. */ |
473 | ib = idal_buffer_alloc(2*fp->view.rows*fp->view.cols + 5, 0); | |
474 | if (IS_ERR(ib)) { | |
475 | raw3270_put_view(&fp->view); | |
476 | raw3270_del_view(&fp->view); | |
2b31001d | 477 | rc = PTR_ERR(ib); |
764a4a8e | 478 | goto out; |
ed3cb6f0 RH |
479 | } |
480 | fp->rdbuf = ib; | |
481 | ||
1da177e4 LT |
482 | rc = raw3270_activate_view(&fp->view); |
483 | if (rc) { | |
ed3cb6f0 | 484 | raw3270_put_view(&fp->view); |
1da177e4 | 485 | raw3270_del_view(&fp->view); |
764a4a8e | 486 | goto out; |
1da177e4 | 487 | } |
58ea91c0 | 488 | nonseekable_open(inode, filp); |
1da177e4 | 489 | filp->private_data = fp; |
764a4a8e | 490 | out: |
5cbb5f57 | 491 | mutex_unlock(&fs3270_mutex); |
a18992d4 | 492 | return rc; |
1da177e4 LT |
493 | } |
494 | ||
495 | /* | |
496 | * This routine is called when the 3270 tty is closed. We wait | |
497 | * for the remaining request to be completed. Then we clean up. | |
498 | */ | |
499 | static int | |
500 | fs3270_close(struct inode *inode, struct file *filp) | |
501 | { | |
502 | struct fs3270 *fp; | |
503 | ||
504 | fp = filp->private_data; | |
d2c993d8 | 505 | filp->private_data = NULL; |
ed3cb6f0 | 506 | if (fp) { |
782237a2 CLG |
507 | put_pid(fp->fs_pid); |
508 | fp->fs_pid = NULL; | |
ed3cb6f0 RH |
509 | raw3270_reset(&fp->view); |
510 | raw3270_put_view(&fp->view); | |
1da177e4 | 511 | raw3270_del_view(&fp->view); |
ed3cb6f0 | 512 | } |
1da177e4 LT |
513 | return 0; |
514 | } | |
515 | ||
d54b1fdb | 516 | static const struct file_operations fs3270_fops = { |
0f75e00c CH |
517 | .owner = THIS_MODULE, /* owner */ |
518 | .read = fs3270_read, /* read */ | |
519 | .write = fs3270_write, /* write */ | |
520 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ | |
521 | .compat_ioctl = fs3270_ioctl, /* ioctl */ | |
16e1a577 HC |
522 | .open = fs3270_open, /* open */ |
523 | .release = fs3270_close, /* release */ | |
6038f373 | 524 | .llseek = no_llseek, |
1da177e4 LT |
525 | }; |
526 | ||
63df41d6 | 527 | static void fs3270_create_cb(int minor) |
c95571e6 MS |
528 | { |
529 | __register_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub", &fs3270_fops); | |
530 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor), | |
531 | NULL, "3270/tub%d", minor); | |
532 | } | |
533 | ||
63df41d6 | 534 | static void fs3270_destroy_cb(int minor) |
c95571e6 MS |
535 | { |
536 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, minor)); | |
537 | __unregister_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub"); | |
538 | } | |
539 | ||
63df41d6 | 540 | static struct raw3270_notifier fs3270_notifier = |
c95571e6 MS |
541 | { |
542 | .create = fs3270_create_cb, | |
543 | .destroy = fs3270_destroy_cb, | |
544 | }; | |
545 | ||
1da177e4 LT |
546 | /* |
547 | * 3270 fullscreen driver initialization. | |
548 | */ | |
549 | static int __init | |
550 | fs3270_init(void) | |
551 | { | |
552 | int rc; | |
553 | ||
c95571e6 | 554 | rc = __register_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270", &fs3270_fops); |
a26182ed | 555 | if (rc) |
1da177e4 | 556 | return rc; |
c95571e6 MS |
557 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0), |
558 | NULL, "3270/tub"); | |
559 | raw3270_register_notifier(&fs3270_notifier); | |
1da177e4 LT |
560 | return 0; |
561 | } | |
562 | ||
563 | static void __exit | |
564 | fs3270_exit(void) | |
565 | { | |
c95571e6 MS |
566 | raw3270_unregister_notifier(&fs3270_notifier); |
567 | __unregister_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270"); | |
1da177e4 LT |
568 | } |
569 | ||
570 | MODULE_LICENSE("GPL"); | |
571 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); | |
572 | ||
573 | module_init(fs3270_init); | |
574 | module_exit(fs3270_exit); |