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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 | ||
8340ab60 | 220 | static void |
1da177e4 LT |
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 | 235 | } |
1da177e4 LT |
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 | |
496ad9aa | 435 | if (imajor(file_inode(filp)) != IBM_FS3270_MAJOR) |
1da177e4 | 436 | return -ENODEV; |
496ad9aa | 437 | minor = iminor(file_inode(filp)); |
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 | 444 | } |
c95571e6 | 445 | minor = tty->index; |
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 | 486 | } |
58ea91c0 | 487 | nonseekable_open(inode, filp); |
1da177e4 | 488 | filp->private_data = fp; |
764a4a8e | 489 | out: |
5cbb5f57 | 490 | mutex_unlock(&fs3270_mutex); |
a18992d4 | 491 | return rc; |
1da177e4 LT |
492 | } |
493 | ||
494 | /* | |
495 | * This routine is called when the 3270 tty is closed. We wait | |
496 | * for the remaining request to be completed. Then we clean up. | |
497 | */ | |
498 | static int | |
499 | fs3270_close(struct inode *inode, struct file *filp) | |
500 | { | |
501 | struct fs3270 *fp; | |
502 | ||
503 | fp = filp->private_data; | |
d2c993d8 | 504 | filp->private_data = NULL; |
ed3cb6f0 | 505 | if (fp) { |
782237a2 CLG |
506 | put_pid(fp->fs_pid); |
507 | fp->fs_pid = NULL; | |
ed3cb6f0 RH |
508 | raw3270_reset(&fp->view); |
509 | raw3270_put_view(&fp->view); | |
1da177e4 | 510 | raw3270_del_view(&fp->view); |
ed3cb6f0 | 511 | } |
1da177e4 LT |
512 | return 0; |
513 | } | |
514 | ||
d54b1fdb | 515 | static const struct file_operations fs3270_fops = { |
0f75e00c CH |
516 | .owner = THIS_MODULE, /* owner */ |
517 | .read = fs3270_read, /* read */ | |
518 | .write = fs3270_write, /* write */ | |
519 | .unlocked_ioctl = fs3270_ioctl, /* ioctl */ | |
520 | .compat_ioctl = fs3270_ioctl, /* ioctl */ | |
16e1a577 HC |
521 | .open = fs3270_open, /* open */ |
522 | .release = fs3270_close, /* release */ | |
6038f373 | 523 | .llseek = no_llseek, |
1da177e4 LT |
524 | }; |
525 | ||
63df41d6 | 526 | static void fs3270_create_cb(int minor) |
c95571e6 MS |
527 | { |
528 | __register_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub", &fs3270_fops); | |
529 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor), | |
530 | NULL, "3270/tub%d", minor); | |
531 | } | |
532 | ||
63df41d6 | 533 | static void fs3270_destroy_cb(int minor) |
c95571e6 MS |
534 | { |
535 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, minor)); | |
536 | __unregister_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub"); | |
537 | } | |
538 | ||
63df41d6 | 539 | static struct raw3270_notifier fs3270_notifier = |
c95571e6 MS |
540 | { |
541 | .create = fs3270_create_cb, | |
542 | .destroy = fs3270_destroy_cb, | |
543 | }; | |
544 | ||
1da177e4 LT |
545 | /* |
546 | * 3270 fullscreen driver initialization. | |
547 | */ | |
548 | static int __init | |
549 | fs3270_init(void) | |
550 | { | |
551 | int rc; | |
552 | ||
c95571e6 | 553 | rc = __register_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270", &fs3270_fops); |
a26182ed | 554 | if (rc) |
1da177e4 | 555 | return rc; |
c95571e6 MS |
556 | device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0), |
557 | NULL, "3270/tub"); | |
558 | raw3270_register_notifier(&fs3270_notifier); | |
1da177e4 LT |
559 | return 0; |
560 | } | |
561 | ||
562 | static void __exit | |
563 | fs3270_exit(void) | |
564 | { | |
c95571e6 | 565 | raw3270_unregister_notifier(&fs3270_notifier); |
d1e61fe4 | 566 | device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, 0)); |
c95571e6 | 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); |