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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/s390/char/con3215.c | |
3 | * 3215 line mode terminal driver. | |
4 | * | |
5 | * S390 version | |
6 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
7 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), | |
8 | * | |
9 | * Updated: | |
10 | * Aug-2000: Added tab support | |
11 | * Dan Morrison, IBM Corporation (dmorriso@cse.buffalo.edu) | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/kdev_t.h> | |
17 | #include <linux/tty.h> | |
33f0f88f | 18 | #include <linux/tty_flip.h> |
1da177e4 LT |
19 | #include <linux/vt_kern.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/console.h> | |
22 | #include <linux/interrupt.h> | |
600b5d16 | 23 | #include <linux/err.h> |
1da177e4 LT |
24 | |
25 | #include <linux/slab.h> | |
26 | #include <linux/bootmem.h> | |
27 | ||
28 | #include <asm/ccwdev.h> | |
29 | #include <asm/cio.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/ebcdic.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include <asm/delay.h> | |
34 | #include <asm/cpcmd.h> | |
35 | #include <asm/setup.h> | |
36 | ||
37 | #include "ctrlchar.h" | |
38 | ||
39 | #define NR_3215 1 | |
40 | #define NR_3215_REQ (4*NR_3215) | |
41 | #define RAW3215_BUFFER_SIZE 65536 /* output buffer size */ | |
42 | #define RAW3215_INBUF_SIZE 256 /* input buffer size */ | |
43 | #define RAW3215_MIN_SPACE 128 /* minimum free space for wakeup */ | |
44 | #define RAW3215_MIN_WRITE 1024 /* min. length for immediate output */ | |
45 | #define RAW3215_MAX_BYTES 3968 /* max. bytes to write with one ssch */ | |
46 | #define RAW3215_MAX_NEWLINE 50 /* max. lines to write with one ssch */ | |
47 | #define RAW3215_NR_CCWS 3 | |
48 | #define RAW3215_TIMEOUT HZ/10 /* time for delayed output */ | |
49 | ||
50 | #define RAW3215_FIXED 1 /* 3215 console device is not be freed */ | |
51 | #define RAW3215_ACTIVE 2 /* set if the device is in use */ | |
52 | #define RAW3215_WORKING 4 /* set if a request is being worked on */ | |
53 | #define RAW3215_THROTTLED 8 /* set if reading is disabled */ | |
54 | #define RAW3215_STOPPED 16 /* set if writing is disabled */ | |
55 | #define RAW3215_CLOSING 32 /* set while in close process */ | |
56 | #define RAW3215_TIMER_RUNS 64 /* set if the output delay timer is on */ | |
57 | #define RAW3215_FLUSHING 128 /* set to flush buffer (no delay) */ | |
58 | ||
59 | #define TAB_STOP_SIZE 8 /* tab stop size */ | |
60 | ||
61 | /* | |
62 | * Request types for a 3215 device | |
63 | */ | |
64 | enum raw3215_type { | |
65 | RAW3215_FREE, RAW3215_READ, RAW3215_WRITE | |
66 | }; | |
67 | ||
68 | /* | |
69 | * Request structure for a 3215 device | |
70 | */ | |
71 | struct raw3215_req { | |
72 | enum raw3215_type type; /* type of the request */ | |
73 | int start, len; /* start index & len in output buffer */ | |
74 | int delayable; /* indication to wait for more data */ | |
75 | int residual; /* residual count for read request */ | |
76 | struct ccw1 ccws[RAW3215_NR_CCWS]; /* space for the channel program */ | |
77 | struct raw3215_info *info; /* pointer to main structure */ | |
78 | struct raw3215_req *next; /* pointer to next request */ | |
79 | } __attribute__ ((aligned(8))); | |
80 | ||
81 | struct raw3215_info { | |
82 | struct ccw_device *cdev; /* device for tty driver */ | |
83 | spinlock_t *lock; /* pointer to irq lock */ | |
84 | int flags; /* state flags */ | |
85 | char *buffer; /* pointer to output buffer */ | |
86 | char *inbuf; /* pointer to input buffer */ | |
87 | int head; /* first free byte in output buffer */ | |
88 | int count; /* number of bytes in output buffer */ | |
89 | int written; /* number of bytes in write requests */ | |
90 | struct tty_struct *tty; /* pointer to tty structure if present */ | |
91 | struct tasklet_struct tasklet; | |
92 | struct raw3215_req *queued_read; /* pointer to queued read requests */ | |
93 | struct raw3215_req *queued_write;/* pointer to queued write requests */ | |
94 | wait_queue_head_t empty_wait; /* wait queue for flushing */ | |
95 | struct timer_list timer; /* timer for delayed output */ | |
1da177e4 LT |
96 | int line_pos; /* position on the line (for tabs) */ |
97 | char ubuffer[80]; /* copy_from_user buffer */ | |
98 | }; | |
99 | ||
100 | /* array of 3215 devices structures */ | |
101 | static struct raw3215_info *raw3215[NR_3215]; | |
102 | /* spinlock to protect the raw3215 array */ | |
103 | static DEFINE_SPINLOCK(raw3215_device_lock); | |
104 | /* list of free request structures */ | |
105 | static struct raw3215_req *raw3215_freelist; | |
106 | /* spinlock to protect free list */ | |
107 | static spinlock_t raw3215_freelist_lock; | |
108 | ||
109 | static struct tty_driver *tty3215_driver; | |
110 | ||
111 | /* | |
112 | * Get a request structure from the free list | |
113 | */ | |
114 | static inline struct raw3215_req * | |
115 | raw3215_alloc_req(void) { | |
116 | struct raw3215_req *req; | |
117 | unsigned long flags; | |
118 | ||
119 | spin_lock_irqsave(&raw3215_freelist_lock, flags); | |
120 | req = raw3215_freelist; | |
121 | raw3215_freelist = req->next; | |
122 | spin_unlock_irqrestore(&raw3215_freelist_lock, flags); | |
123 | return req; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Put a request structure back to the free list | |
128 | */ | |
129 | static inline void | |
130 | raw3215_free_req(struct raw3215_req *req) { | |
131 | unsigned long flags; | |
132 | ||
133 | if (req->type == RAW3215_FREE) | |
134 | return; /* don't free a free request */ | |
135 | req->type = RAW3215_FREE; | |
136 | spin_lock_irqsave(&raw3215_freelist_lock, flags); | |
137 | req->next = raw3215_freelist; | |
138 | raw3215_freelist = req; | |
139 | spin_unlock_irqrestore(&raw3215_freelist_lock, flags); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Set up a read request that reads up to 160 byte from the 3215 device. | |
144 | * If there is a queued read request it is used, but that shouldn't happen | |
145 | * because a 3215 terminal won't accept a new read before the old one is | |
146 | * completed. | |
147 | */ | |
148 | static void | |
149 | raw3215_mk_read_req(struct raw3215_info *raw) | |
150 | { | |
151 | struct raw3215_req *req; | |
152 | struct ccw1 *ccw; | |
153 | ||
154 | /* there can only be ONE read request at a time */ | |
155 | req = raw->queued_read; | |
156 | if (req == NULL) { | |
157 | /* no queued read request, use new req structure */ | |
158 | req = raw3215_alloc_req(); | |
159 | req->type = RAW3215_READ; | |
160 | req->info = raw; | |
161 | raw->queued_read = req; | |
162 | } | |
163 | ||
164 | ccw = req->ccws; | |
165 | ccw->cmd_code = 0x0A; /* read inquiry */ | |
166 | ccw->flags = 0x20; /* ignore incorrect length */ | |
167 | ccw->count = 160; | |
168 | ccw->cda = (__u32) __pa(raw->inbuf); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Set up a write request with the information from the main structure. | |
173 | * A ccw chain is created that writes as much as possible from the output | |
174 | * buffer to the 3215 device. If a queued write exists it is replaced by | |
175 | * the new, probably lengthened request. | |
176 | */ | |
177 | static void | |
178 | raw3215_mk_write_req(struct raw3215_info *raw) | |
179 | { | |
180 | struct raw3215_req *req; | |
181 | struct ccw1 *ccw; | |
182 | int len, count, ix, lines; | |
183 | ||
184 | if (raw->count <= raw->written) | |
185 | return; | |
186 | /* check if there is a queued write request */ | |
187 | req = raw->queued_write; | |
188 | if (req == NULL) { | |
189 | /* no queued write request, use new req structure */ | |
190 | req = raw3215_alloc_req(); | |
191 | req->type = RAW3215_WRITE; | |
192 | req->info = raw; | |
193 | raw->queued_write = req; | |
194 | } else { | |
195 | raw->written -= req->len; | |
196 | } | |
197 | ||
198 | ccw = req->ccws; | |
199 | req->start = (raw->head - raw->count + raw->written) & | |
200 | (RAW3215_BUFFER_SIZE - 1); | |
201 | /* | |
202 | * now we have to count newlines. We can at max accept | |
203 | * RAW3215_MAX_NEWLINE newlines in a single ssch due to | |
204 | * a restriction in VM | |
205 | */ | |
206 | lines = 0; | |
207 | ix = req->start; | |
208 | while (lines < RAW3215_MAX_NEWLINE && ix != raw->head) { | |
209 | if (raw->buffer[ix] == 0x15) | |
210 | lines++; | |
211 | ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1); | |
212 | } | |
213 | len = ((ix - 1 - req->start) & (RAW3215_BUFFER_SIZE - 1)) + 1; | |
214 | if (len > RAW3215_MAX_BYTES) | |
215 | len = RAW3215_MAX_BYTES; | |
216 | req->len = len; | |
217 | raw->written += len; | |
218 | ||
219 | /* set the indication if we should try to enlarge this request */ | |
220 | req->delayable = (ix == raw->head) && (len < RAW3215_MIN_WRITE); | |
221 | ||
222 | ix = req->start; | |
223 | while (len > 0) { | |
224 | if (ccw > req->ccws) | |
225 | ccw[-1].flags |= 0x40; /* use command chaining */ | |
226 | ccw->cmd_code = 0x01; /* write, auto carrier return */ | |
227 | ccw->flags = 0x20; /* ignore incorrect length ind. */ | |
228 | ccw->cda = | |
229 | (__u32) __pa(raw->buffer + ix); | |
230 | count = len; | |
231 | if (ix + count > RAW3215_BUFFER_SIZE) | |
232 | count = RAW3215_BUFFER_SIZE - ix; | |
233 | ccw->count = count; | |
234 | len -= count; | |
235 | ix = (ix + count) & (RAW3215_BUFFER_SIZE - 1); | |
236 | ccw++; | |
237 | } | |
238 | /* | |
239 | * Add a NOP to the channel program. 3215 devices are purely | |
240 | * emulated and its much better to avoid the channel end | |
241 | * interrupt in this case. | |
242 | */ | |
243 | if (ccw > req->ccws) | |
244 | ccw[-1].flags |= 0x40; /* use command chaining */ | |
245 | ccw->cmd_code = 0x03; /* NOP */ | |
246 | ccw->flags = 0; | |
247 | ccw->cda = 0; | |
248 | ccw->count = 1; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Start a read or a write request | |
253 | */ | |
254 | static void | |
255 | raw3215_start_io(struct raw3215_info *raw) | |
256 | { | |
257 | struct raw3215_req *req; | |
258 | int res; | |
259 | ||
260 | req = raw->queued_read; | |
261 | if (req != NULL && | |
262 | !(raw->flags & (RAW3215_WORKING | RAW3215_THROTTLED))) { | |
263 | /* dequeue request */ | |
264 | raw->queued_read = NULL; | |
265 | res = ccw_device_start(raw->cdev, req->ccws, | |
266 | (unsigned long) req, 0, 0); | |
267 | if (res != 0) { | |
268 | /* do_IO failed, put request back to queue */ | |
269 | raw->queued_read = req; | |
270 | } else { | |
271 | raw->flags |= RAW3215_WORKING; | |
272 | } | |
273 | } | |
274 | req = raw->queued_write; | |
275 | if (req != NULL && | |
276 | !(raw->flags & (RAW3215_WORKING | RAW3215_STOPPED))) { | |
277 | /* dequeue request */ | |
278 | raw->queued_write = NULL; | |
279 | res = ccw_device_start(raw->cdev, req->ccws, | |
280 | (unsigned long) req, 0, 0); | |
281 | if (res != 0) { | |
282 | /* do_IO failed, put request back to queue */ | |
283 | raw->queued_write = req; | |
284 | } else { | |
285 | raw->flags |= RAW3215_WORKING; | |
286 | } | |
287 | } | |
288 | } | |
289 | ||
290 | /* | |
291 | * Function to start a delayed output after RAW3215_TIMEOUT seconds | |
292 | */ | |
293 | static void | |
294 | raw3215_timeout(unsigned long __data) | |
295 | { | |
296 | struct raw3215_info *raw = (struct raw3215_info *) __data; | |
297 | unsigned long flags; | |
298 | ||
520a4e37 | 299 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
300 | if (raw->flags & RAW3215_TIMER_RUNS) { |
301 | del_timer(&raw->timer); | |
302 | raw->flags &= ~RAW3215_TIMER_RUNS; | |
303 | raw3215_mk_write_req(raw); | |
304 | raw3215_start_io(raw); | |
305 | } | |
520a4e37 | 306 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
307 | } |
308 | ||
309 | /* | |
310 | * Function to conditionally start an IO. A read is started immediately, | |
311 | * a write is only started immediately if the flush flag is on or the | |
312 | * amount of data is bigger than RAW3215_MIN_WRITE. If a write is not | |
313 | * done immediately a timer is started with a delay of RAW3215_TIMEOUT. | |
314 | */ | |
315 | static inline void | |
316 | raw3215_try_io(struct raw3215_info *raw) | |
317 | { | |
318 | if (!(raw->flags & RAW3215_ACTIVE)) | |
319 | return; | |
320 | if (raw->queued_read != NULL) | |
321 | raw3215_start_io(raw); | |
322 | else if (raw->queued_write != NULL) { | |
323 | if ((raw->queued_write->delayable == 0) || | |
324 | (raw->flags & RAW3215_FLUSHING)) { | |
325 | /* execute write requests bigger than minimum size */ | |
326 | raw3215_start_io(raw); | |
327 | if (raw->flags & RAW3215_TIMER_RUNS) { | |
328 | del_timer(&raw->timer); | |
329 | raw->flags &= ~RAW3215_TIMER_RUNS; | |
330 | } | |
331 | } else if (!(raw->flags & RAW3215_TIMER_RUNS)) { | |
332 | /* delay small writes */ | |
333 | init_timer(&raw->timer); | |
334 | raw->timer.expires = RAW3215_TIMEOUT + jiffies; | |
335 | raw->timer.data = (unsigned long) raw; | |
336 | raw->timer.function = raw3215_timeout; | |
337 | add_timer(&raw->timer); | |
338 | raw->flags |= RAW3215_TIMER_RUNS; | |
339 | } | |
340 | } | |
341 | } | |
342 | ||
343 | /* | |
344 | * The bottom half handler routine for 3215 devices. It tries to start | |
345 | * the next IO and wakes up processes waiting on the tty. | |
346 | */ | |
347 | static void | |
348 | raw3215_tasklet(void *data) | |
349 | { | |
350 | struct raw3215_info *raw; | |
351 | struct tty_struct *tty; | |
352 | unsigned long flags; | |
353 | ||
354 | raw = (struct raw3215_info *) data; | |
520a4e37 | 355 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
356 | raw3215_mk_write_req(raw); |
357 | raw3215_try_io(raw); | |
520a4e37 | 358 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
359 | tty = raw->tty; |
360 | if (tty != NULL && | |
361 | RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) { | |
362 | tty_wakeup(tty); | |
363 | } | |
364 | } | |
365 | ||
366 | /* | |
367 | * Interrupt routine, called from common io layer | |
368 | */ | |
369 | static void | |
370 | raw3215_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
371 | { | |
372 | struct raw3215_info *raw; | |
373 | struct raw3215_req *req; | |
374 | struct tty_struct *tty; | |
375 | int cstat, dstat; | |
1d030370 | 376 | int count; |
1da177e4 LT |
377 | |
378 | raw = cdev->dev.driver_data; | |
379 | req = (struct raw3215_req *) intparm; | |
23d805b6 PO |
380 | cstat = irb->scsw.cmd.cstat; |
381 | dstat = irb->scsw.cmd.dstat; | |
26348f78 | 382 | if (cstat != 0) |
1da177e4 | 383 | tasklet_schedule(&raw->tasklet); |
1da177e4 LT |
384 | if (dstat & 0x01) { /* we got a unit exception */ |
385 | dstat &= ~0x01; /* we can ignore it */ | |
386 | } | |
387 | switch (dstat) { | |
388 | case 0x80: | |
389 | if (cstat != 0) | |
390 | break; | |
391 | /* Attention interrupt, someone hit the enter key */ | |
392 | raw3215_mk_read_req(raw); | |
1da177e4 LT |
393 | tasklet_schedule(&raw->tasklet); |
394 | break; | |
395 | case 0x08: | |
396 | case 0x0C: | |
397 | /* Channel end interrupt. */ | |
398 | if ((raw = req->info) == NULL) | |
399 | return; /* That shouldn't happen ... */ | |
400 | if (req->type == RAW3215_READ) { | |
401 | /* store residual count, then wait for device end */ | |
23d805b6 | 402 | req->residual = irb->scsw.cmd.count; |
1da177e4 LT |
403 | } |
404 | if (dstat == 0x08) | |
405 | break; | |
406 | case 0x04: | |
407 | /* Device end interrupt. */ | |
408 | if ((raw = req->info) == NULL) | |
409 | return; /* That shouldn't happen ... */ | |
410 | if (req->type == RAW3215_READ && raw->tty != NULL) { | |
411 | unsigned int cchar; | |
412 | ||
413 | tty = raw->tty; | |
414 | count = 160 - req->residual; | |
1da177e4 LT |
415 | EBCASC(raw->inbuf, count); |
416 | cchar = ctrlchar_handle(raw->inbuf, count, tty); | |
417 | switch (cchar & CTRLCHAR_MASK) { | |
418 | case CTRLCHAR_SYSRQ: | |
419 | break; | |
420 | ||
421 | case CTRLCHAR_CTRL: | |
33f0f88f | 422 | tty_insert_flip_char(tty, cchar, TTY_NORMAL); |
1da177e4 LT |
423 | tty_flip_buffer_push(raw->tty); |
424 | break; | |
425 | ||
426 | case CTRLCHAR_NONE: | |
1da177e4 | 427 | if (count < 2 || |
33f0f88f AC |
428 | (strncmp(raw->inbuf+count-2, "\252n", 2) && |
429 | strncmp(raw->inbuf+count-2, "^n", 2)) ) { | |
430 | /* add the auto \n */ | |
431 | raw->inbuf[count] = '\n'; | |
1da177e4 LT |
432 | count++; |
433 | } else | |
33f0f88f AC |
434 | count -= 2; |
435 | tty_insert_flip_string(tty, raw->inbuf, count); | |
1da177e4 LT |
436 | tty_flip_buffer_push(raw->tty); |
437 | break; | |
438 | } | |
439 | } else if (req->type == RAW3215_WRITE) { | |
440 | raw->count -= req->len; | |
441 | raw->written -= req->len; | |
442 | } | |
443 | raw->flags &= ~RAW3215_WORKING; | |
444 | raw3215_free_req(req); | |
445 | /* check for empty wait */ | |
446 | if (waitqueue_active(&raw->empty_wait) && | |
447 | raw->queued_write == NULL && | |
448 | raw->queued_read == NULL) { | |
449 | wake_up_interruptible(&raw->empty_wait); | |
450 | } | |
451 | tasklet_schedule(&raw->tasklet); | |
452 | break; | |
453 | default: | |
454 | /* Strange interrupt, I'll do my best to clean up */ | |
455 | if (req != NULL && req->type != RAW3215_FREE) { | |
456 | if (req->type == RAW3215_WRITE) { | |
457 | raw->count -= req->len; | |
458 | raw->written -= req->len; | |
459 | } | |
460 | raw->flags &= ~RAW3215_WORKING; | |
461 | raw3215_free_req(req); | |
462 | } | |
1da177e4 LT |
463 | tasklet_schedule(&raw->tasklet); |
464 | } | |
465 | return; | |
466 | } | |
467 | ||
468 | /* | |
469 | * Wait until length bytes are available int the output buffer. | |
470 | * Has to be called with the s390irq lock held. Can be called | |
471 | * disabled. | |
472 | */ | |
473 | static void | |
474 | raw3215_make_room(struct raw3215_info *raw, unsigned int length) | |
475 | { | |
476 | while (RAW3215_BUFFER_SIZE - raw->count < length) { | |
477 | /* there might be a request pending */ | |
478 | raw->flags |= RAW3215_FLUSHING; | |
479 | raw3215_mk_write_req(raw); | |
480 | raw3215_try_io(raw); | |
481 | raw->flags &= ~RAW3215_FLUSHING; | |
482 | #ifdef CONFIG_TN3215_CONSOLE | |
483 | wait_cons_dev(); | |
484 | #endif | |
485 | /* Enough room freed up ? */ | |
486 | if (RAW3215_BUFFER_SIZE - raw->count >= length) | |
487 | break; | |
488 | /* there might be another cpu waiting for the lock */ | |
520a4e37 | 489 | spin_unlock(get_ccwdev_lock(raw->cdev)); |
1da177e4 | 490 | udelay(100); |
520a4e37 | 491 | spin_lock(get_ccwdev_lock(raw->cdev)); |
1da177e4 LT |
492 | } |
493 | } | |
494 | ||
495 | /* | |
496 | * String write routine for 3215 devices | |
497 | */ | |
498 | static void | |
499 | raw3215_write(struct raw3215_info *raw, const char *str, unsigned int length) | |
500 | { | |
501 | unsigned long flags; | |
502 | int c, count; | |
503 | ||
504 | while (length > 0) { | |
520a4e37 | 505 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
506 | count = (length > RAW3215_BUFFER_SIZE) ? |
507 | RAW3215_BUFFER_SIZE : length; | |
508 | length -= count; | |
509 | ||
510 | raw3215_make_room(raw, count); | |
511 | ||
512 | /* copy string to output buffer and convert it to EBCDIC */ | |
513 | while (1) { | |
514 | c = min_t(int, count, | |
515 | min(RAW3215_BUFFER_SIZE - raw->count, | |
516 | RAW3215_BUFFER_SIZE - raw->head)); | |
517 | if (c <= 0) | |
518 | break; | |
519 | memcpy(raw->buffer + raw->head, str, c); | |
520 | ASCEBC(raw->buffer + raw->head, c); | |
521 | raw->head = (raw->head + c) & (RAW3215_BUFFER_SIZE - 1); | |
522 | raw->count += c; | |
523 | raw->line_pos += c; | |
524 | str += c; | |
525 | count -= c; | |
526 | } | |
527 | if (!(raw->flags & RAW3215_WORKING)) { | |
528 | raw3215_mk_write_req(raw); | |
529 | /* start or queue request */ | |
530 | raw3215_try_io(raw); | |
531 | } | |
520a4e37 | 532 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
533 | } |
534 | } | |
535 | ||
536 | /* | |
537 | * Put character routine for 3215 devices | |
538 | */ | |
539 | static void | |
540 | raw3215_putchar(struct raw3215_info *raw, unsigned char ch) | |
541 | { | |
542 | unsigned long flags; | |
543 | unsigned int length, i; | |
544 | ||
520a4e37 | 545 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
546 | if (ch == '\t') { |
547 | length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE); | |
548 | raw->line_pos += length; | |
549 | ch = ' '; | |
550 | } else if (ch == '\n') { | |
551 | length = 1; | |
552 | raw->line_pos = 0; | |
553 | } else { | |
554 | length = 1; | |
555 | raw->line_pos++; | |
556 | } | |
557 | raw3215_make_room(raw, length); | |
558 | ||
559 | for (i = 0; i < length; i++) { | |
560 | raw->buffer[raw->head] = (char) _ascebc[(int) ch]; | |
561 | raw->head = (raw->head + 1) & (RAW3215_BUFFER_SIZE - 1); | |
562 | raw->count++; | |
563 | } | |
564 | if (!(raw->flags & RAW3215_WORKING)) { | |
565 | raw3215_mk_write_req(raw); | |
566 | /* start or queue request */ | |
567 | raw3215_try_io(raw); | |
568 | } | |
520a4e37 | 569 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
570 | } |
571 | ||
572 | /* | |
573 | * Flush routine, it simply sets the flush flag and tries to start | |
574 | * pending IO. | |
575 | */ | |
576 | static void | |
577 | raw3215_flush_buffer(struct raw3215_info *raw) | |
578 | { | |
579 | unsigned long flags; | |
580 | ||
520a4e37 | 581 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
582 | if (raw->count > 0) { |
583 | raw->flags |= RAW3215_FLUSHING; | |
584 | raw3215_try_io(raw); | |
585 | raw->flags &= ~RAW3215_FLUSHING; | |
586 | } | |
520a4e37 | 587 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
588 | } |
589 | ||
590 | /* | |
591 | * Fire up a 3215 device. | |
592 | */ | |
593 | static int | |
594 | raw3215_startup(struct raw3215_info *raw) | |
595 | { | |
596 | unsigned long flags; | |
597 | ||
598 | if (raw->flags & RAW3215_ACTIVE) | |
599 | return 0; | |
600 | raw->line_pos = 0; | |
601 | raw->flags |= RAW3215_ACTIVE; | |
520a4e37 | 602 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 | 603 | raw3215_try_io(raw); |
520a4e37 | 604 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
605 | |
606 | return 0; | |
607 | } | |
608 | ||
609 | /* | |
610 | * Shutdown a 3215 device. | |
611 | */ | |
612 | static void | |
613 | raw3215_shutdown(struct raw3215_info *raw) | |
614 | { | |
615 | DECLARE_WAITQUEUE(wait, current); | |
616 | unsigned long flags; | |
617 | ||
618 | if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FIXED)) | |
619 | return; | |
620 | /* Wait for outstanding requests, then free irq */ | |
520a4e37 | 621 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
622 | if ((raw->flags & RAW3215_WORKING) || |
623 | raw->queued_write != NULL || | |
624 | raw->queued_read != NULL) { | |
625 | raw->flags |= RAW3215_CLOSING; | |
626 | add_wait_queue(&raw->empty_wait, &wait); | |
627 | set_current_state(TASK_INTERRUPTIBLE); | |
520a4e37 | 628 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 | 629 | schedule(); |
520a4e37 | 630 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
631 | remove_wait_queue(&raw->empty_wait, &wait); |
632 | set_current_state(TASK_RUNNING); | |
633 | raw->flags &= ~(RAW3215_ACTIVE | RAW3215_CLOSING); | |
634 | } | |
520a4e37 | 635 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
636 | } |
637 | ||
638 | static int | |
639 | raw3215_probe (struct ccw_device *cdev) | |
640 | { | |
641 | struct raw3215_info *raw; | |
642 | int line; | |
643 | ||
a2e53801 CH |
644 | /* Console is special. */ |
645 | if (raw3215[0] && (cdev->dev.driver_data == raw3215[0])) | |
646 | return 0; | |
1da177e4 LT |
647 | raw = kmalloc(sizeof(struct raw3215_info) + |
648 | RAW3215_INBUF_SIZE, GFP_KERNEL|GFP_DMA); | |
649 | if (raw == NULL) | |
650 | return -ENOMEM; | |
651 | ||
652 | spin_lock(&raw3215_device_lock); | |
653 | for (line = 0; line < NR_3215; line++) { | |
654 | if (!raw3215[line]) { | |
655 | raw3215[line] = raw; | |
656 | break; | |
657 | } | |
658 | } | |
659 | spin_unlock(&raw3215_device_lock); | |
660 | if (line == NR_3215) { | |
661 | kfree(raw); | |
662 | return -ENODEV; | |
663 | } | |
664 | ||
665 | raw->cdev = cdev; | |
1da177e4 LT |
666 | raw->inbuf = (char *) raw + sizeof(struct raw3215_info); |
667 | memset(raw, 0, sizeof(struct raw3215_info)); | |
5cbded58 | 668 | raw->buffer = kmalloc(RAW3215_BUFFER_SIZE, |
1da177e4 LT |
669 | GFP_KERNEL|GFP_DMA); |
670 | if (raw->buffer == NULL) { | |
671 | spin_lock(&raw3215_device_lock); | |
d2c993d8 | 672 | raw3215[line] = NULL; |
1da177e4 LT |
673 | spin_unlock(&raw3215_device_lock); |
674 | kfree(raw); | |
675 | return -ENOMEM; | |
676 | } | |
677 | tasklet_init(&raw->tasklet, | |
678 | (void (*)(unsigned long)) raw3215_tasklet, | |
679 | (unsigned long) raw); | |
680 | init_waitqueue_head(&raw->empty_wait); | |
681 | ||
682 | cdev->dev.driver_data = raw; | |
683 | cdev->handler = raw3215_irq; | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | static void | |
689 | raw3215_remove (struct ccw_device *cdev) | |
690 | { | |
691 | struct raw3215_info *raw; | |
692 | ||
693 | ccw_device_set_offline(cdev); | |
694 | raw = cdev->dev.driver_data; | |
695 | if (raw) { | |
696 | cdev->dev.driver_data = NULL; | |
17fd682e | 697 | kfree(raw->buffer); |
1da177e4 LT |
698 | kfree(raw); |
699 | } | |
700 | } | |
701 | ||
702 | static int | |
703 | raw3215_set_online (struct ccw_device *cdev) | |
704 | { | |
705 | struct raw3215_info *raw; | |
706 | ||
707 | raw = cdev->dev.driver_data; | |
708 | if (!raw) | |
709 | return -ENODEV; | |
710 | ||
711 | return raw3215_startup(raw); | |
712 | } | |
713 | ||
714 | static int | |
715 | raw3215_set_offline (struct ccw_device *cdev) | |
716 | { | |
717 | struct raw3215_info *raw; | |
718 | ||
719 | raw = cdev->dev.driver_data; | |
720 | if (!raw) | |
721 | return -ENODEV; | |
722 | ||
723 | raw3215_shutdown(raw); | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static struct ccw_device_id raw3215_id[] = { | |
729 | { CCW_DEVICE(0x3215, 0) }, | |
730 | { /* end of list */ }, | |
731 | }; | |
732 | ||
733 | static struct ccw_driver raw3215_ccw_driver = { | |
734 | .name = "3215", | |
735 | .owner = THIS_MODULE, | |
736 | .ids = raw3215_id, | |
737 | .probe = &raw3215_probe, | |
738 | .remove = &raw3215_remove, | |
739 | .set_online = &raw3215_set_online, | |
740 | .set_offline = &raw3215_set_offline, | |
741 | }; | |
742 | ||
743 | #ifdef CONFIG_TN3215_CONSOLE | |
744 | /* | |
745 | * Write a string to the 3215 console | |
746 | */ | |
747 | static void | |
748 | con3215_write(struct console *co, const char *str, unsigned int count) | |
749 | { | |
750 | struct raw3215_info *raw; | |
751 | int i; | |
752 | ||
753 | if (count <= 0) | |
754 | return; | |
755 | raw = raw3215[0]; /* console 3215 is the first one */ | |
756 | while (count > 0) { | |
757 | for (i = 0; i < count; i++) | |
758 | if (str[i] == '\t' || str[i] == '\n') | |
759 | break; | |
760 | raw3215_write(raw, str, i); | |
761 | count -= i; | |
762 | str += i; | |
763 | if (count > 0) { | |
764 | raw3215_putchar(raw, *str); | |
765 | count--; | |
766 | str++; | |
767 | } | |
768 | } | |
769 | } | |
770 | ||
771 | static struct tty_driver *con3215_device(struct console *c, int *index) | |
772 | { | |
773 | *index = c->index; | |
774 | return tty3215_driver; | |
775 | } | |
776 | ||
777 | /* | |
778 | * panic() calls console_unblank before the system enters a | |
779 | * disabled, endless loop. | |
780 | */ | |
781 | static void | |
782 | con3215_unblank(void) | |
783 | { | |
784 | struct raw3215_info *raw; | |
785 | unsigned long flags; | |
786 | ||
787 | raw = raw3215[0]; /* console 3215 is the first one */ | |
520a4e37 | 788 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 | 789 | raw3215_make_room(raw, RAW3215_BUFFER_SIZE); |
520a4e37 | 790 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
791 | } |
792 | ||
1da177e4 LT |
793 | /* |
794 | * The console structure for the 3215 console | |
795 | */ | |
796 | static struct console con3215 = { | |
797 | .name = "ttyS", | |
798 | .write = con3215_write, | |
799 | .device = con3215_device, | |
800 | .unblank = con3215_unblank, | |
1da177e4 LT |
801 | .flags = CON_PRINTBUFFER, |
802 | }; | |
803 | ||
804 | /* | |
805 | * 3215 console initialization code called from console_init(). | |
806 | * NOTE: This is called before kmalloc is available. | |
807 | */ | |
808 | static int __init | |
809 | con3215_init(void) | |
810 | { | |
811 | struct ccw_device *cdev; | |
812 | struct raw3215_info *raw; | |
813 | struct raw3215_req *req; | |
814 | int i; | |
815 | ||
816 | /* Check if 3215 is to be the console */ | |
817 | if (!CONSOLE_IS_3215) | |
818 | return -ENODEV; | |
819 | ||
820 | /* Set the console mode for VM */ | |
821 | if (MACHINE_IS_VM) { | |
6b979de3 CB |
822 | cpcmd("TERM CONMODE 3215", NULL, 0, NULL); |
823 | cpcmd("TERM AUTOCR OFF", NULL, 0, NULL); | |
1da177e4 LT |
824 | } |
825 | ||
826 | /* allocate 3215 request structures */ | |
827 | raw3215_freelist = NULL; | |
828 | spin_lock_init(&raw3215_freelist_lock); | |
829 | for (i = 0; i < NR_3215_REQ; i++) { | |
830 | req = (struct raw3215_req *) alloc_bootmem_low(sizeof(struct raw3215_req)); | |
831 | req->next = raw3215_freelist; | |
832 | raw3215_freelist = req; | |
833 | } | |
834 | ||
835 | cdev = ccw_device_probe_console(); | |
600b5d16 | 836 | if (IS_ERR(cdev)) |
1da177e4 LT |
837 | return -ENODEV; |
838 | ||
839 | raw3215[0] = raw = (struct raw3215_info *) | |
840 | alloc_bootmem_low(sizeof(struct raw3215_info)); | |
841 | memset(raw, 0, sizeof(struct raw3215_info)); | |
842 | raw->buffer = (char *) alloc_bootmem_low(RAW3215_BUFFER_SIZE); | |
843 | raw->inbuf = (char *) alloc_bootmem_low(RAW3215_INBUF_SIZE); | |
844 | raw->cdev = cdev; | |
1da177e4 LT |
845 | cdev->dev.driver_data = raw; |
846 | cdev->handler = raw3215_irq; | |
847 | ||
848 | raw->flags |= RAW3215_FIXED; | |
849 | tasklet_init(&raw->tasklet, | |
850 | (void (*)(unsigned long)) raw3215_tasklet, | |
851 | (unsigned long) raw); | |
852 | init_waitqueue_head(&raw->empty_wait); | |
853 | ||
854 | /* Request the console irq */ | |
855 | if (raw3215_startup(raw) != 0) { | |
856 | free_bootmem((unsigned long) raw->inbuf, RAW3215_INBUF_SIZE); | |
857 | free_bootmem((unsigned long) raw->buffer, RAW3215_BUFFER_SIZE); | |
858 | free_bootmem((unsigned long) raw, sizeof(struct raw3215_info)); | |
859 | raw3215[0] = NULL; | |
1da177e4 LT |
860 | return -ENODEV; |
861 | } | |
862 | register_console(&con3215); | |
863 | return 0; | |
864 | } | |
865 | console_initcall(con3215_init); | |
866 | #endif | |
867 | ||
868 | /* | |
869 | * tty3215_open | |
870 | * | |
871 | * This routine is called whenever a 3215 tty is opened. | |
872 | */ | |
873 | static int | |
874 | tty3215_open(struct tty_struct *tty, struct file * filp) | |
875 | { | |
876 | struct raw3215_info *raw; | |
877 | int retval, line; | |
878 | ||
879 | line = tty->index; | |
880 | if ((line < 0) || (line >= NR_3215)) | |
881 | return -ENODEV; | |
882 | ||
883 | raw = raw3215[line]; | |
884 | if (raw == NULL) | |
885 | return -ENODEV; | |
886 | ||
887 | tty->driver_data = raw; | |
888 | raw->tty = tty; | |
889 | ||
890 | tty->low_latency = 0; /* don't use bottom half for pushing chars */ | |
891 | /* | |
892 | * Start up 3215 device | |
893 | */ | |
894 | retval = raw3215_startup(raw); | |
895 | if (retval) | |
896 | return retval; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | /* | |
902 | * tty3215_close() | |
903 | * | |
904 | * This routine is called when the 3215 tty is closed. We wait | |
905 | * for the remaining request to be completed. Then we clean up. | |
906 | */ | |
907 | static void | |
908 | tty3215_close(struct tty_struct *tty, struct file * filp) | |
909 | { | |
910 | struct raw3215_info *raw; | |
911 | ||
912 | raw = (struct raw3215_info *) tty->driver_data; | |
913 | if (raw == NULL || tty->count > 1) | |
914 | return; | |
915 | tty->closing = 1; | |
916 | /* Shutdown the terminal */ | |
917 | raw3215_shutdown(raw); | |
918 | tty->closing = 0; | |
919 | raw->tty = NULL; | |
920 | } | |
921 | ||
922 | /* | |
923 | * Returns the amount of free space in the output buffer. | |
924 | */ | |
925 | static int | |
926 | tty3215_write_room(struct tty_struct *tty) | |
927 | { | |
928 | struct raw3215_info *raw; | |
929 | ||
930 | raw = (struct raw3215_info *) tty->driver_data; | |
931 | ||
932 | /* Subtract TAB_STOP_SIZE to allow for a tab, 8 <<< 64K */ | |
933 | if ((RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE) >= 0) | |
934 | return RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE; | |
935 | else | |
936 | return 0; | |
937 | } | |
938 | ||
939 | /* | |
940 | * String write routine for 3215 ttys | |
941 | */ | |
942 | static int | |
943 | tty3215_write(struct tty_struct * tty, | |
944 | const unsigned char *buf, int count) | |
945 | { | |
946 | struct raw3215_info *raw; | |
947 | ||
948 | if (!tty) | |
949 | return 0; | |
950 | raw = (struct raw3215_info *) tty->driver_data; | |
951 | raw3215_write(raw, buf, count); | |
952 | return count; | |
953 | } | |
954 | ||
955 | /* | |
956 | * Put character routine for 3215 ttys | |
957 | */ | |
9e7c9a19 | 958 | static int |
1da177e4 LT |
959 | tty3215_put_char(struct tty_struct *tty, unsigned char ch) |
960 | { | |
961 | struct raw3215_info *raw; | |
962 | ||
963 | if (!tty) | |
9e7c9a19 | 964 | return 0; |
1da177e4 LT |
965 | raw = (struct raw3215_info *) tty->driver_data; |
966 | raw3215_putchar(raw, ch); | |
9e7c9a19 | 967 | return 1; |
1da177e4 LT |
968 | } |
969 | ||
970 | static void | |
971 | tty3215_flush_chars(struct tty_struct *tty) | |
972 | { | |
973 | } | |
974 | ||
975 | /* | |
976 | * Returns the number of characters in the output buffer | |
977 | */ | |
978 | static int | |
979 | tty3215_chars_in_buffer(struct tty_struct *tty) | |
980 | { | |
981 | struct raw3215_info *raw; | |
982 | ||
983 | raw = (struct raw3215_info *) tty->driver_data; | |
984 | return raw->count; | |
985 | } | |
986 | ||
987 | static void | |
988 | tty3215_flush_buffer(struct tty_struct *tty) | |
989 | { | |
990 | struct raw3215_info *raw; | |
991 | ||
992 | raw = (struct raw3215_info *) tty->driver_data; | |
993 | raw3215_flush_buffer(raw); | |
994 | tty_wakeup(tty); | |
995 | } | |
996 | ||
997 | /* | |
998 | * Currently we don't have any io controls for 3215 ttys | |
999 | */ | |
1000 | static int | |
1001 | tty3215_ioctl(struct tty_struct *tty, struct file * file, | |
1002 | unsigned int cmd, unsigned long arg) | |
1003 | { | |
1004 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1005 | return -EIO; | |
1006 | ||
1007 | switch (cmd) { | |
1008 | default: | |
1009 | return -ENOIOCTLCMD; | |
1010 | } | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Disable reading from a 3215 tty | |
1016 | */ | |
1017 | static void | |
1018 | tty3215_throttle(struct tty_struct * tty) | |
1019 | { | |
1020 | struct raw3215_info *raw; | |
1021 | ||
1022 | raw = (struct raw3215_info *) tty->driver_data; | |
1023 | raw->flags |= RAW3215_THROTTLED; | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Enable reading from a 3215 tty | |
1028 | */ | |
1029 | static void | |
1030 | tty3215_unthrottle(struct tty_struct * tty) | |
1031 | { | |
1032 | struct raw3215_info *raw; | |
1033 | unsigned long flags; | |
1034 | ||
1035 | raw = (struct raw3215_info *) tty->driver_data; | |
1036 | if (raw->flags & RAW3215_THROTTLED) { | |
520a4e37 | 1037 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
1038 | raw->flags &= ~RAW3215_THROTTLED; |
1039 | raw3215_try_io(raw); | |
520a4e37 | 1040 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
1041 | } |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Disable writing to a 3215 tty | |
1046 | */ | |
1047 | static void | |
1048 | tty3215_stop(struct tty_struct *tty) | |
1049 | { | |
1050 | struct raw3215_info *raw; | |
1051 | ||
1052 | raw = (struct raw3215_info *) tty->driver_data; | |
1053 | raw->flags |= RAW3215_STOPPED; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Enable writing to a 3215 tty | |
1058 | */ | |
1059 | static void | |
1060 | tty3215_start(struct tty_struct *tty) | |
1061 | { | |
1062 | struct raw3215_info *raw; | |
1063 | unsigned long flags; | |
1064 | ||
1065 | raw = (struct raw3215_info *) tty->driver_data; | |
1066 | if (raw->flags & RAW3215_STOPPED) { | |
520a4e37 | 1067 | spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
1068 | raw->flags &= ~RAW3215_STOPPED; |
1069 | raw3215_try_io(raw); | |
520a4e37 | 1070 | spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags); |
1da177e4 LT |
1071 | } |
1072 | } | |
1073 | ||
b68e31d0 | 1074 | static const struct tty_operations tty3215_ops = { |
1da177e4 LT |
1075 | .open = tty3215_open, |
1076 | .close = tty3215_close, | |
1077 | .write = tty3215_write, | |
1078 | .put_char = tty3215_put_char, | |
1079 | .flush_chars = tty3215_flush_chars, | |
1080 | .write_room = tty3215_write_room, | |
1081 | .chars_in_buffer = tty3215_chars_in_buffer, | |
1082 | .flush_buffer = tty3215_flush_buffer, | |
1083 | .ioctl = tty3215_ioctl, | |
1084 | .throttle = tty3215_throttle, | |
1085 | .unthrottle = tty3215_unthrottle, | |
1086 | .stop = tty3215_stop, | |
1087 | .start = tty3215_start, | |
1088 | }; | |
1089 | ||
1090 | /* | |
1091 | * 3215 tty registration code called from tty_init(). | |
1092 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1093 | */ | |
2b67fc46 | 1094 | static int __init |
1da177e4 LT |
1095 | tty3215_init(void) |
1096 | { | |
1097 | struct tty_driver *driver; | |
1098 | int ret; | |
1099 | ||
1100 | if (!CONSOLE_IS_3215) | |
1101 | return 0; | |
1102 | ||
1103 | driver = alloc_tty_driver(NR_3215); | |
1104 | if (!driver) | |
1105 | return -ENOMEM; | |
1106 | ||
1107 | ret = ccw_driver_register(&raw3215_ccw_driver); | |
1108 | if (ret) { | |
1109 | put_tty_driver(driver); | |
1110 | return ret; | |
1111 | } | |
1112 | /* | |
1113 | * Initialize the tty_driver structure | |
1114 | * Entries in tty3215_driver that are NOT initialized: | |
1115 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1116 | */ | |
1117 | ||
1118 | driver->owner = THIS_MODULE; | |
1119 | driver->driver_name = "tty3215"; | |
1120 | driver->name = "ttyS"; | |
1121 | driver->major = TTY_MAJOR; | |
1122 | driver->minor_start = 64; | |
1123 | driver->type = TTY_DRIVER_TYPE_SYSTEM; | |
1124 | driver->subtype = SYSTEM_TYPE_TTY; | |
1125 | driver->init_termios = tty_std_termios; | |
1126 | driver->init_termios.c_iflag = IGNBRK | IGNPAR; | |
1127 | driver->init_termios.c_oflag = ONLCR | XTABS; | |
1128 | driver->init_termios.c_lflag = ISIG; | |
1129 | driver->flags = TTY_DRIVER_REAL_RAW; | |
1130 | tty_set_operations(driver, &tty3215_ops); | |
1131 | ret = tty_register_driver(driver); | |
1132 | if (ret) { | |
1da177e4 LT |
1133 | put_tty_driver(driver); |
1134 | return ret; | |
1135 | } | |
1136 | tty3215_driver = driver; | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | static void __exit | |
1141 | tty3215_exit(void) | |
1142 | { | |
1143 | tty_unregister_driver(tty3215_driver); | |
1144 | put_tty_driver(tty3215_driver); | |
1145 | ccw_driver_unregister(&raw3215_ccw_driver); | |
1146 | } | |
1147 | ||
1148 | module_init(tty3215_init); | |
1149 | module_exit(tty3215_exit); |