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> | |
14 | #include <linux/list.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 | 16 | #include <linux/types.h> |
764a4a8e | 17 | #include <linux/smp_lock.h> |
1da177e4 | 18 | |
16e1a577 | 19 | #include <asm/compat.h> |
1da177e4 LT |
20 | #include <asm/ccwdev.h> |
21 | #include <asm/cio.h> | |
1da177e4 LT |
22 | #include <asm/ebcdic.h> |
23 | #include <asm/idals.h> | |
24 | ||
25 | #include "raw3270.h" | |
26 | #include "ctrlchar.h" | |
27 | ||
2b67fc46 | 28 | static struct raw3270_fn fs3270_fn; |
1da177e4 LT |
29 | |
30 | struct fs3270 { | |
31 | struct raw3270_view view; | |
782237a2 | 32 | struct pid *fs_pid; /* Pid of controlling program. */ |
1da177e4 LT |
33 | int read_command; /* ccw command to use for reads. */ |
34 | int write_command; /* ccw command to use for writes. */ | |
35 | int attention; /* Got attention. */ | |
ed3cb6f0 RH |
36 | int active; /* Fullscreen view is active. */ |
37 | struct raw3270_request *init; /* single init request. */ | |
38 | wait_queue_head_t wait; /* Init & attention wait queue. */ | |
39 | struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */ | |
40 | size_t rdbuf_size; /* size of data returned by RDBUF */ | |
1da177e4 LT |
41 | }; |
42 | ||
5cbb5f57 MS |
43 | static DEFINE_MUTEX(fs3270_mutex); |
44 | ||
1da177e4 LT |
45 | static void |
46 | fs3270_wake_up(struct raw3270_request *rq, void *data) | |
47 | { | |
48 | wake_up((wait_queue_head_t *) data); | |
49 | } | |
50 | ||
ed3cb6f0 RH |
51 | static inline int |
52 | fs3270_working(struct fs3270 *fp) | |
53 | { | |
54 | /* | |
55 | * The fullscreen view is in working order if the view | |
56 | * has been activated AND the initial request is finished. | |
57 | */ | |
58 | return fp->active && raw3270_request_final(fp->init); | |
59 | } | |
60 | ||
1da177e4 LT |
61 | static int |
62 | fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq) | |
63 | { | |
ed3cb6f0 | 64 | struct fs3270 *fp; |
1da177e4 LT |
65 | int rc; |
66 | ||
ed3cb6f0 | 67 | fp = (struct fs3270 *) view; |
1da177e4 | 68 | rq->callback = fs3270_wake_up; |
ed3cb6f0 RH |
69 | rq->callback_data = &fp->wait; |
70 | ||
71 | do { | |
72 | if (!fs3270_working(fp)) { | |
73 | /* Fullscreen view isn't ready yet. */ | |
74 | rc = wait_event_interruptible(fp->wait, | |
75 | fs3270_working(fp)); | |
76 | if (rc != 0) | |
77 | break; | |
78 | } | |
79 | rc = raw3270_start(view, rq); | |
80 | if (rc == 0) { | |
af901ca1 | 81 | /* Started successfully. Now wait for completion. */ |
ed3cb6f0 RH |
82 | wait_event(fp->wait, raw3270_request_final(rq)); |
83 | } | |
84 | } while (rc == -EACCES); | |
85 | return rc; | |
1da177e4 LT |
86 | } |
87 | ||
ed3cb6f0 RH |
88 | /* |
89 | * Switch to the fullscreen view. | |
90 | */ | |
1da177e4 LT |
91 | static void |
92 | fs3270_reset_callback(struct raw3270_request *rq, void *data) | |
93 | { | |
ed3cb6f0 RH |
94 | struct fs3270 *fp; |
95 | ||
96 | fp = (struct fs3270 *) rq->view; | |
1da177e4 | 97 | raw3270_request_reset(rq); |
ed3cb6f0 RH |
98 | wake_up(&fp->wait); |
99 | } | |
100 | ||
101 | static void | |
102 | fs3270_restore_callback(struct raw3270_request *rq, void *data) | |
103 | { | |
104 | struct fs3270 *fp; | |
105 | ||
106 | fp = (struct fs3270 *) rq->view; | |
107 | if (rq->rc != 0 || rq->rescnt != 0) { | |
108 | if (fp->fs_pid) | |
782237a2 | 109 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
110 | } |
111 | fp->rdbuf_size = 0; | |
112 | raw3270_request_reset(rq); | |
113 | wake_up(&fp->wait); | |
1da177e4 LT |
114 | } |
115 | ||
1da177e4 LT |
116 | static int |
117 | fs3270_activate(struct raw3270_view *view) | |
118 | { | |
119 | struct fs3270 *fp; | |
ed3cb6f0 RH |
120 | char *cp; |
121 | int rc; | |
1da177e4 LT |
122 | |
123 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
124 | |
125 | /* If an old init command is still running just return. */ | |
126 | if (!raw3270_request_final(fp->init)) | |
127 | return 0; | |
128 | ||
129 | if (fp->rdbuf_size == 0) { | |
130 | /* No saved buffer. Just clear the screen. */ | |
131 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
132 | fp->init->callback = fs3270_reset_callback; | |
133 | } else { | |
134 | /* Restore fullscreen buffer saved by fs3270_deactivate. */ | |
135 | raw3270_request_set_cmd(fp->init, TC_EWRITEA); | |
136 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
137 | fp->init->ccw.count = fp->rdbuf_size; | |
138 | cp = fp->rdbuf->data[0]; | |
139 | cp[0] = TW_KR; | |
140 | cp[1] = TO_SBA; | |
141 | cp[2] = cp[6]; | |
142 | cp[3] = cp[7]; | |
143 | cp[4] = TO_IC; | |
144 | cp[5] = TO_SBA; | |
145 | cp[6] = 0x40; | |
146 | cp[7] = 0x40; | |
147 | fp->init->rescnt = 0; | |
148 | fp->init->callback = fs3270_restore_callback; | |
149 | } | |
150 | rc = fp->init->rc = raw3270_start_locked(view, fp->init); | |
151 | if (rc) | |
152 | fp->init->callback(fp->init, NULL); | |
153 | else | |
154 | fp->active = 1; | |
155 | return rc; | |
1da177e4 LT |
156 | } |
157 | ||
158 | /* | |
159 | * Shutdown fullscreen view. | |
160 | */ | |
ed3cb6f0 RH |
161 | static void |
162 | fs3270_save_callback(struct raw3270_request *rq, void *data) | |
163 | { | |
164 | struct fs3270 *fp; | |
165 | ||
166 | fp = (struct fs3270 *) rq->view; | |
167 | ||
168 | /* Correct idal buffer element 0 address. */ | |
169 | fp->rdbuf->data[0] -= 5; | |
170 | fp->rdbuf->size += 5; | |
171 | ||
172 | /* | |
173 | * If the rdbuf command failed or the idal buffer is | |
174 | * to small for the amount of data returned by the | |
175 | * rdbuf command, then we have no choice but to send | |
176 | * a SIGHUP to the application. | |
177 | */ | |
178 | if (rq->rc != 0 || rq->rescnt == 0) { | |
179 | if (fp->fs_pid) | |
782237a2 | 180 | kill_pid(fp->fs_pid, SIGHUP, 1); |
ed3cb6f0 RH |
181 | fp->rdbuf_size = 0; |
182 | } else | |
183 | fp->rdbuf_size = fp->rdbuf->size - rq->rescnt; | |
184 | raw3270_request_reset(rq); | |
185 | wake_up(&fp->wait); | |
186 | } | |
187 | ||
1da177e4 LT |
188 | static void |
189 | fs3270_deactivate(struct raw3270_view *view) | |
190 | { | |
1da177e4 LT |
191 | struct fs3270 *fp; |
192 | ||
193 | fp = (struct fs3270 *) view; | |
ed3cb6f0 RH |
194 | fp->active = 0; |
195 | ||
196 | /* If an old init command is still running just return. */ | |
197 | if (!raw3270_request_final(fp->init)) | |
198 | return; | |
199 | ||
200 | /* Prepare read-buffer request. */ | |
201 | raw3270_request_set_cmd(fp->init, TC_RDBUF); | |
202 | /* | |
203 | * Hackish: skip first 5 bytes of the idal buffer to make | |
204 | * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence | |
205 | * in the activation command. | |
206 | */ | |
207 | fp->rdbuf->data[0] += 5; | |
208 | fp->rdbuf->size -= 5; | |
209 | raw3270_request_set_idal(fp->init, fp->rdbuf); | |
210 | fp->init->rescnt = 0; | |
211 | fp->init->callback = fs3270_save_callback; | |
212 | ||
213 | /* Start I/O to read in the 3270 buffer. */ | |
214 | fp->init->rc = raw3270_start_locked(view, fp->init); | |
215 | if (fp->init->rc) | |
216 | fp->init->callback(fp->init, NULL); | |
1da177e4 LT |
217 | } |
218 | ||
219 | static int | |
220 | fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb) | |
221 | { | |
222 | /* Handle ATTN. Set indication and wake waiters for attention. */ | |
23d805b6 | 223 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 | 224 | fp->attention = 1; |
ed3cb6f0 | 225 | wake_up(&fp->wait); |
1da177e4 LT |
226 | } |
227 | ||
228 | if (rq) { | |
23d805b6 | 229 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 LT |
230 | rq->rc = -EIO; |
231 | else | |
232 | /* Normal end. Copy residual count. */ | |
23d805b6 | 233 | rq->rescnt = irb->scsw.cmd.count; |
1da177e4 LT |
234 | } |
235 | return RAW3270_IO_DONE; | |
236 | } | |
237 | ||
238 | /* | |
239 | * Process reads from fullscreen 3270. | |
240 | */ | |
241 | static ssize_t | |
d2c993d8 | 242 | fs3270_read(struct file *filp, char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
243 | { |
244 | struct fs3270 *fp; | |
245 | struct raw3270_request *rq; | |
246 | struct idal_buffer *ib; | |
ed3cb6f0 | 247 | ssize_t rc; |
1da177e4 LT |
248 | |
249 | if (count == 0 || count > 65535) | |
250 | return -EINVAL; | |
251 | fp = filp->private_data; | |
252 | if (!fp) | |
253 | return -ENODEV; | |
254 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 255 | if (IS_ERR(ib)) |
1da177e4 LT |
256 | return -ENOMEM; |
257 | rq = raw3270_request_alloc(0); | |
258 | if (!IS_ERR(rq)) { | |
259 | if (fp->read_command == 0 && fp->write_command != 0) | |
260 | fp->read_command = 6; | |
261 | raw3270_request_set_cmd(rq, fp->read_command ? : 2); | |
262 | raw3270_request_set_idal(rq, ib); | |
ed3cb6f0 RH |
263 | rc = wait_event_interruptible(fp->wait, fp->attention); |
264 | fp->attention = 0; | |
265 | if (rc == 0) { | |
266 | rc = fs3270_do_io(&fp->view, rq); | |
267 | if (rc == 0) { | |
268 | count -= rq->rescnt; | |
269 | if (idal_buffer_to_user(ib, data, count) != 0) | |
270 | rc = -EFAULT; | |
271 | else | |
272 | rc = count; | |
273 | ||
274 | } | |
275 | } | |
1da177e4 LT |
276 | raw3270_request_free(rq); |
277 | } else | |
278 | rc = PTR_ERR(rq); | |
279 | idal_buffer_free(ib); | |
280 | return rc; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Process writes to fullscreen 3270. | |
285 | */ | |
286 | static ssize_t | |
d2c993d8 | 287 | fs3270_write(struct file *filp, const char __user *data, size_t count, loff_t *off) |
1da177e4 LT |
288 | { |
289 | struct fs3270 *fp; | |
290 | struct raw3270_request *rq; | |
291 | struct idal_buffer *ib; | |
292 | int write_command; | |
ed3cb6f0 | 293 | ssize_t rc; |
1da177e4 LT |
294 | |
295 | fp = filp->private_data; | |
296 | if (!fp) | |
297 | return -ENODEV; | |
298 | ib = idal_buffer_alloc(count, 0); | |
ed3cb6f0 | 299 | if (IS_ERR(ib)) |
1da177e4 LT |
300 | return -ENOMEM; |
301 | rq = raw3270_request_alloc(0); | |
302 | if (!IS_ERR(rq)) { | |
303 | if (idal_buffer_from_user(ib, data, count) == 0) { | |
304 | write_command = fp->write_command ? : 1; | |
305 | if (write_command == 5) | |
306 | write_command = 13; | |
307 | raw3270_request_set_cmd(rq, write_command); | |
308 | raw3270_request_set_idal(rq, ib); | |
309 | rc = fs3270_do_io(&fp->view, rq); | |
ed3cb6f0 RH |
310 | if (rc == 0) |
311 | rc = count - rq->rescnt; | |
1da177e4 LT |
312 | } else |
313 | rc = -EFAULT; | |
314 | raw3270_request_free(rq); | |
315 | } else | |
316 | rc = PTR_ERR(rq); | |
317 | idal_buffer_free(ib); | |
318 | return rc; | |
319 | } | |
320 | ||
321 | /* | |
322 | * process ioctl commands for the tube driver | |
323 | */ | |
0f75e00c CH |
324 | static long |
325 | fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 326 | { |
16e1a577 | 327 | char __user *argp; |
1da177e4 LT |
328 | struct fs3270 *fp; |
329 | struct raw3270_iocb iocb; | |
330 | int rc; | |
331 | ||
332 | fp = filp->private_data; | |
333 | if (!fp) | |
334 | return -ENODEV; | |
16e1a577 HC |
335 | if (is_compat_task()) |
336 | argp = compat_ptr(arg); | |
337 | else | |
338 | argp = (char __user *)arg; | |
1da177e4 | 339 | rc = 0; |
5cbb5f57 | 340 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
341 | switch (cmd) { |
342 | case TUBICMD: | |
343 | fp->read_command = arg; | |
344 | break; | |
345 | case TUBOCMD: | |
346 | fp->write_command = arg; | |
347 | break; | |
348 | case TUBGETI: | |
16e1a577 | 349 | rc = put_user(fp->read_command, argp); |
1da177e4 LT |
350 | break; |
351 | case TUBGETO: | |
16e1a577 | 352 | rc = put_user(fp->write_command, argp); |
1da177e4 LT |
353 | break; |
354 | case TUBGETMOD: | |
355 | iocb.model = fp->view.model; | |
356 | iocb.line_cnt = fp->view.rows; | |
357 | iocb.col_cnt = fp->view.cols; | |
358 | iocb.pf_cnt = 24; | |
359 | iocb.re_cnt = 20; | |
360 | iocb.map = 0; | |
16e1a577 | 361 | if (copy_to_user(argp, &iocb, sizeof(struct raw3270_iocb))) |
1da177e4 LT |
362 | rc = -EFAULT; |
363 | break; | |
364 | } | |
5cbb5f57 | 365 | mutex_unlock(&fs3270_mutex); |
1da177e4 LT |
366 | return rc; |
367 | } | |
368 | ||
369 | /* | |
ed3cb6f0 | 370 | * Allocate fs3270 structure. |
1da177e4 LT |
371 | */ |
372 | static struct fs3270 * | |
373 | fs3270_alloc_view(void) | |
374 | { | |
375 | struct fs3270 *fp; | |
376 | ||
88abaab4 | 377 | fp = kzalloc(sizeof(struct fs3270),GFP_KERNEL); |
1da177e4 LT |
378 | if (!fp) |
379 | return ERR_PTR(-ENOMEM); | |
ed3cb6f0 RH |
380 | fp->init = raw3270_request_alloc(0); |
381 | if (IS_ERR(fp->init)) { | |
1da177e4 LT |
382 | kfree(fp); |
383 | return ERR_PTR(-ENOMEM); | |
384 | } | |
385 | return fp; | |
386 | } | |
387 | ||
388 | /* | |
ed3cb6f0 | 389 | * Free fs3270 structure. |
1da177e4 LT |
390 | */ |
391 | static void | |
392 | fs3270_free_view(struct raw3270_view *view) | |
393 | { | |
ed3cb6f0 RH |
394 | struct fs3270 *fp; |
395 | ||
396 | fp = (struct fs3270 *) view; | |
397 | if (fp->rdbuf) | |
398 | idal_buffer_free(fp->rdbuf); | |
399 | raw3270_request_free(((struct fs3270 *) view)->init); | |
1da177e4 LT |
400 | kfree(view); |
401 | } | |
402 | ||
403 | /* | |
404 | * Unlink fs3270 data structure from filp. | |
405 | */ | |
406 | static void | |
407 | fs3270_release(struct raw3270_view *view) | |
408 | { | |
4b214a0c MS |
409 | struct fs3270 *fp; |
410 | ||
411 | fp = (struct fs3270 *) view; | |
412 | if (fp->fs_pid) | |
413 | kill_pid(fp->fs_pid, SIGHUP, 1); | |
1da177e4 LT |
414 | } |
415 | ||
416 | /* View to a 3270 device. Can be console, tty or fullscreen. */ | |
2b67fc46 | 417 | static struct raw3270_fn fs3270_fn = { |
1da177e4 LT |
418 | .activate = fs3270_activate, |
419 | .deactivate = fs3270_deactivate, | |
420 | .intv = (void *) fs3270_irq, | |
421 | .release = fs3270_release, | |
422 | .free = fs3270_free_view | |
423 | }; | |
424 | ||
425 | /* | |
426 | * This routine is called whenever a 3270 fullscreen device is opened. | |
427 | */ | |
428 | static int | |
429 | fs3270_open(struct inode *inode, struct file *filp) | |
430 | { | |
431 | struct fs3270 *fp; | |
ed3cb6f0 | 432 | struct idal_buffer *ib; |
a18992d4 | 433 | int minor, rc = 0; |
1da177e4 | 434 | |
49522c97 | 435 | if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR) |
1da177e4 | 436 | return -ENODEV; |
49522c97 | 437 | minor = iminor(filp->f_path.dentry->d_inode); |
ed3cb6f0 RH |
438 | /* Check for minor 0 multiplexer. */ |
439 | if (minor == 0) { | |
a90610e5 | 440 | struct tty_struct *tty = get_current_tty(); |
24ec839c | 441 | if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) { |
452a00d2 | 442 | tty_kref_put(tty); |
a18992d4 | 443 | return -ENODEV; |
24ec839c PZ |
444 | } |
445 | minor = tty->index + RAW3270_FIRSTMINOR; | |
452a00d2 | 446 | tty_kref_put(tty); |
ed3cb6f0 | 447 | } |
5cbb5f57 | 448 | mutex_lock(&fs3270_mutex); |
1da177e4 LT |
449 | /* Check if some other program is already using fullscreen mode. */ |
450 | fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor); | |
451 | if (!IS_ERR(fp)) { | |
452 | raw3270_put_view(&fp->view); | |
764a4a8e JC |
453 | rc = -EBUSY; |
454 | goto out; | |
1da177e4 LT |
455 | } |
456 | /* Allocate fullscreen view structure. */ | |
457 | fp = fs3270_alloc_view(); | |
764a4a8e JC |
458 | if (IS_ERR(fp)) { |
459 | rc = PTR_ERR(fp); | |
460 | goto out; | |
461 | } | |
1da177e4 | 462 | |
ed3cb6f0 | 463 | init_waitqueue_head(&fp->wait); |
782237a2 | 464 | fp->fs_pid = get_pid(task_pid(current)); |
1da177e4 LT |
465 | rc = raw3270_add_view(&fp->view, &fs3270_fn, minor); |
466 | if (rc) { | |
467 | fs3270_free_view(&fp->view); | |
764a4a8e | 468 | goto out; |
1da177e4 LT |
469 | } |
470 | ||
ed3cb6f0 RH |
471 | /* Allocate idal-buffer. */ |
472 | ib = idal_buffer_alloc(2*fp->view.rows*fp->view.cols + 5, 0); | |
473 | if (IS_ERR(ib)) { | |
474 | raw3270_put_view(&fp->view); | |
475 | raw3270_del_view(&fp->view); | |
2b31001d | 476 | rc = PTR_ERR(ib); |
764a4a8e | 477 | goto out; |
ed3cb6f0 RH |
478 | } |
479 | fp->rdbuf = ib; | |
480 | ||
1da177e4 LT |
481 | rc = raw3270_activate_view(&fp->view); |
482 | if (rc) { | |
ed3cb6f0 | 483 | raw3270_put_view(&fp->view); |
1da177e4 | 484 | raw3270_del_view(&fp->view); |
764a4a8e | 485 | goto out; |
1da177e4 LT |
486 | } |
487 | filp->private_data = fp; | |
764a4a8e | 488 | out: |
5cbb5f57 | 489 | mutex_unlock(&fs3270_mutex); |
a18992d4 | 490 | return rc; |
1da177e4 LT |
491 | } |
492 | ||
493 | /* | |
494 | * This routine is called when the 3270 tty is closed. We wait | |
495 | * for the remaining request to be completed. Then we clean up. | |
496 | */ | |
497 | static int | |
498 | fs3270_close(struct inode *inode, struct file *filp) | |
499 | { | |
500 | struct fs3270 *fp; | |
501 | ||
502 | fp = filp->private_data; | |
d2c993d8 | 503 | filp->private_data = NULL; |
ed3cb6f0 | 504 | if (fp) { |
782237a2 CLG |
505 | put_pid(fp->fs_pid); |
506 | fp->fs_pid = NULL; | |
ed3cb6f0 RH |
507 | raw3270_reset(&fp->view); |
508 | raw3270_put_view(&fp->view); | |
1da177e4 | 509 | raw3270_del_view(&fp->view); |
ed3cb6f0 | 510 | } |
1da177e4 LT |
511 | return 0; |
512 | } | |
513 | ||
d54b1fdb | 514 | static const struct file_operations fs3270_fops = { |
0f75e00c CH |
515 | .owner = THIS_MODULE, /* owner */ |
516 | .read = fs3270_read, /* read */ | |
517 | .write = fs3270_write, /* write */ | |
518 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ | |
519 | .compat_ioctl = fs3270_ioctl, /* ioctl */ | |
16e1a577 HC |
520 | .open = fs3270_open, /* open */ |
521 | .release = fs3270_close, /* release */ | |
1da177e4 LT |
522 | }; |
523 | ||
524 | /* | |
525 | * 3270 fullscreen driver initialization. | |
526 | */ | |
527 | static int __init | |
528 | fs3270_init(void) | |
529 | { | |
530 | int rc; | |
531 | ||
532 | rc = register_chrdev(IBM_FS3270_MAJOR, "fs3270", &fs3270_fops); | |
a26182ed | 533 | if (rc) |
1da177e4 | 534 | return rc; |
1da177e4 LT |
535 | return 0; |
536 | } | |
537 | ||
538 | static void __exit | |
539 | fs3270_exit(void) | |
540 | { | |
541 | unregister_chrdev(IBM_FS3270_MAJOR, "fs3270"); | |
542 | } | |
543 | ||
544 | MODULE_LICENSE("GPL"); | |
545 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_FS3270_MAJOR); | |
546 | ||
547 | module_init(fs3270_init); | |
548 | module_exit(fs3270_exit); |