Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * SCLP line mode terminal driver. |
3 | * | |
4 | * S390 version | |
a53c8fab | 5 | * Copyright IBM Corp. 1999 |
1da177e4 LT |
6 | * Author(s): Martin Peschke <mpeschke@de.ibm.com> |
7 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
8 | */ | |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/kmod.h> | |
12 | #include <linux/tty.h> | |
13 | #include <linux/tty_driver.h> | |
33f0f88f | 14 | #include <linux/tty_flip.h> |
1da177e4 LT |
15 | #include <linux/err.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/interrupt.h> | |
5a0e3ad6 | 18 | #include <linux/gfp.h> |
1da177e4 LT |
19 | #include <asm/uaccess.h> |
20 | ||
21 | #include "ctrlchar.h" | |
22 | #include "sclp.h" | |
23 | #include "sclp_rw.h" | |
24 | #include "sclp_tty.h" | |
25 | ||
1da177e4 LT |
26 | /* |
27 | * size of a buffer that collects single characters coming in | |
28 | * via sclp_tty_put_char() | |
29 | */ | |
30 | #define SCLP_TTY_BUF_SIZE 512 | |
31 | ||
32 | /* | |
33 | * There is exactly one SCLP terminal, so we can keep things simple | |
34 | * and allocate all variables statically. | |
35 | */ | |
36 | ||
37 | /* Lock to guard over changes to global variables. */ | |
38 | static spinlock_t sclp_tty_lock; | |
39 | /* List of free pages that can be used for console output buffering. */ | |
40 | static struct list_head sclp_tty_pages; | |
41 | /* List of full struct sclp_buffer structures ready for output. */ | |
42 | static struct list_head sclp_tty_outqueue; | |
43 | /* Counter how many buffers are emitted. */ | |
44 | static int sclp_tty_buffer_count; | |
45 | /* Pointer to current console buffer. */ | |
46 | static struct sclp_buffer *sclp_ttybuf; | |
47 | /* Timer for delayed output of console messages. */ | |
48 | static struct timer_list sclp_tty_timer; | |
1da177e4 | 49 | |
0ea63da2 | 50 | static struct tty_port sclp_port; |
1da177e4 LT |
51 | static unsigned char sclp_tty_chars[SCLP_TTY_BUF_SIZE]; |
52 | static unsigned short int sclp_tty_chars_count; | |
53 | ||
54 | struct tty_driver *sclp_tty_driver; | |
55 | ||
095761d2 HC |
56 | static int sclp_tty_tolower; |
57 | static int sclp_tty_columns = 80; | |
58 | ||
59 | #define SPACES_PER_TAB 8 | |
60 | #define CASE_DELIMITER 0x6c /* to separate upper and lower case (% in EBCDIC) */ | |
1da177e4 LT |
61 | |
62 | /* This routine is called whenever we try to open a SCLP terminal. */ | |
63 | static int | |
64 | sclp_tty_open(struct tty_struct *tty, struct file *filp) | |
65 | { | |
0ea63da2 | 66 | tty_port_tty_set(&sclp_port, tty); |
1da177e4 LT |
67 | tty->driver_data = NULL; |
68 | tty->low_latency = 0; | |
69 | return 0; | |
70 | } | |
71 | ||
72 | /* This routine is called when the SCLP terminal is closed. */ | |
73 | static void | |
74 | sclp_tty_close(struct tty_struct *tty, struct file *filp) | |
75 | { | |
76 | if (tty->count > 1) | |
77 | return; | |
0ea63da2 | 78 | tty_port_tty_set(&sclp_port, NULL); |
1da177e4 LT |
79 | } |
80 | ||
1da177e4 LT |
81 | /* |
82 | * This routine returns the numbers of characters the tty driver | |
83 | * will accept for queuing to be written. This number is subject | |
84 | * to change as output buffers get emptied, or if the output flow | |
85 | * control is acted. This is not an exact number because not every | |
86 | * character needs the same space in the sccb. The worst case is | |
87 | * a string of newlines. Every newlines creates a new mto which | |
88 | * needs 8 bytes. | |
89 | */ | |
90 | static int | |
91 | sclp_tty_write_room (struct tty_struct *tty) | |
92 | { | |
93 | unsigned long flags; | |
94 | struct list_head *l; | |
95 | int count; | |
96 | ||
97 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
98 | count = 0; | |
99 | if (sclp_ttybuf != NULL) | |
100 | count = sclp_buffer_space(sclp_ttybuf) / sizeof(struct mto); | |
101 | list_for_each(l, &sclp_tty_pages) | |
102 | count += NR_EMPTY_MTO_PER_SCCB; | |
103 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
104 | return count; | |
105 | } | |
106 | ||
107 | static void | |
108 | sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc) | |
109 | { | |
0ea63da2 | 110 | struct tty_struct *tty; |
1da177e4 LT |
111 | unsigned long flags; |
112 | void *page; | |
113 | ||
114 | do { | |
115 | page = sclp_unmake_buffer(buffer); | |
116 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
117 | /* Remove buffer from outqueue */ | |
118 | list_del(&buffer->list); | |
119 | sclp_tty_buffer_count--; | |
120 | list_add_tail((struct list_head *) page, &sclp_tty_pages); | |
121 | /* Check if there is a pending buffer on the out queue. */ | |
122 | buffer = NULL; | |
123 | if (!list_empty(&sclp_tty_outqueue)) | |
124 | buffer = list_entry(sclp_tty_outqueue.next, | |
125 | struct sclp_buffer, list); | |
126 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
127 | } while (buffer && sclp_emit_buffer(buffer, sclp_ttybuf_callback)); | |
1da177e4 | 128 | /* check if the tty needs a wake up call */ |
0ea63da2 JS |
129 | tty = tty_port_tty_get(&sclp_port); |
130 | if (tty != NULL) { | |
131 | tty_wakeup(tty); | |
132 | tty_kref_put(tty); | |
1da177e4 LT |
133 | } |
134 | } | |
135 | ||
136 | static inline void | |
137 | __sclp_ttybuf_emit(struct sclp_buffer *buffer) | |
138 | { | |
139 | unsigned long flags; | |
140 | int count; | |
141 | int rc; | |
142 | ||
143 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
144 | list_add_tail(&buffer->list, &sclp_tty_outqueue); | |
145 | count = sclp_tty_buffer_count++; | |
146 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
147 | if (count) | |
148 | return; | |
149 | rc = sclp_emit_buffer(buffer, sclp_ttybuf_callback); | |
150 | if (rc) | |
151 | sclp_ttybuf_callback(buffer, rc); | |
152 | } | |
153 | ||
154 | /* | |
155 | * When this routine is called from the timer then we flush the | |
156 | * temporary write buffer. | |
157 | */ | |
158 | static void | |
159 | sclp_tty_timeout(unsigned long data) | |
160 | { | |
161 | unsigned long flags; | |
162 | struct sclp_buffer *buf; | |
163 | ||
164 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
165 | buf = sclp_ttybuf; | |
166 | sclp_ttybuf = NULL; | |
167 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
168 | ||
169 | if (buf != NULL) { | |
170 | __sclp_ttybuf_emit(buf); | |
171 | } | |
172 | } | |
173 | ||
174 | /* | |
175 | * Write a string to the sclp tty. | |
176 | */ | |
5e34599f | 177 | static int sclp_tty_write_string(const unsigned char *str, int count, int may_fail) |
1da177e4 LT |
178 | { |
179 | unsigned long flags; | |
180 | void *page; | |
181 | int written; | |
5e34599f | 182 | int overall_written; |
1da177e4 LT |
183 | struct sclp_buffer *buf; |
184 | ||
185 | if (count <= 0) | |
5e34599f HC |
186 | return 0; |
187 | overall_written = 0; | |
1da177e4 LT |
188 | spin_lock_irqsave(&sclp_tty_lock, flags); |
189 | do { | |
190 | /* Create a sclp output buffer if none exists yet */ | |
191 | if (sclp_ttybuf == NULL) { | |
192 | while (list_empty(&sclp_tty_pages)) { | |
193 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
5e34599f HC |
194 | if (may_fail) |
195 | goto out; | |
1da177e4 | 196 | else |
5e34599f | 197 | sclp_sync_wait(); |
1da177e4 LT |
198 | spin_lock_irqsave(&sclp_tty_lock, flags); |
199 | } | |
200 | page = sclp_tty_pages.next; | |
201 | list_del((struct list_head *) page); | |
095761d2 HC |
202 | sclp_ttybuf = sclp_make_buffer(page, sclp_tty_columns, |
203 | SPACES_PER_TAB); | |
1da177e4 LT |
204 | } |
205 | /* try to write the string to the current output buffer */ | |
206 | written = sclp_write(sclp_ttybuf, str, count); | |
5e34599f | 207 | overall_written += written; |
1da177e4 LT |
208 | if (written == count) |
209 | break; | |
210 | /* | |
211 | * Not all characters could be written to the current | |
212 | * output buffer. Emit the buffer, create a new buffer | |
213 | * and then output the rest of the string. | |
214 | */ | |
215 | buf = sclp_ttybuf; | |
216 | sclp_ttybuf = NULL; | |
217 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
218 | __sclp_ttybuf_emit(buf); | |
219 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
220 | str += written; | |
221 | count -= written; | |
222 | } while (count > 0); | |
223 | /* Setup timer to output current console buffer after 1/10 second */ | |
095761d2 HC |
224 | if (sclp_ttybuf && sclp_chars_in_buffer(sclp_ttybuf) && |
225 | !timer_pending(&sclp_tty_timer)) { | |
226 | init_timer(&sclp_tty_timer); | |
227 | sclp_tty_timer.function = sclp_tty_timeout; | |
228 | sclp_tty_timer.data = 0UL; | |
229 | sclp_tty_timer.expires = jiffies + HZ/10; | |
230 | add_timer(&sclp_tty_timer); | |
1da177e4 LT |
231 | } |
232 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
5e34599f HC |
233 | out: |
234 | return overall_written; | |
1da177e4 LT |
235 | } |
236 | ||
237 | /* | |
238 | * This routine is called by the kernel to write a series of characters to the | |
239 | * tty device. The characters may come from user space or kernel space. This | |
240 | * routine will return the number of characters actually accepted for writing. | |
241 | */ | |
242 | static int | |
243 | sclp_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
244 | { | |
245 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 246 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
247 | sclp_tty_chars_count = 0; |
248 | } | |
5e34599f | 249 | return sclp_tty_write_string(buf, count, 1); |
1da177e4 LT |
250 | } |
251 | ||
252 | /* | |
253 | * This routine is called by the kernel to write a single character to the tty | |
254 | * device. If the kernel uses this routine, it must call the flush_chars() | |
255 | * routine (if defined) when it is done stuffing characters into the driver. | |
256 | * | |
257 | * Characters provided to sclp_tty_put_char() are buffered by the SCLP driver. | |
258 | * If the given character is a '\n' the contents of the SCLP write buffer | |
259 | * - including previous characters from sclp_tty_put_char() and strings from | |
260 | * sclp_write() without final '\n' - will be written. | |
261 | */ | |
9e7c9a19 | 262 | static int |
1da177e4 LT |
263 | sclp_tty_put_char(struct tty_struct *tty, unsigned char ch) |
264 | { | |
265 | sclp_tty_chars[sclp_tty_chars_count++] = ch; | |
266 | if (ch == '\n' || sclp_tty_chars_count >= SCLP_TTY_BUF_SIZE) { | |
5e34599f | 267 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 | 268 | sclp_tty_chars_count = 0; |
5e34599f HC |
269 | } |
270 | return 1; | |
1da177e4 LT |
271 | } |
272 | ||
273 | /* | |
274 | * This routine is called by the kernel after it has written a series of | |
275 | * characters to the tty device using put_char(). | |
276 | */ | |
277 | static void | |
278 | sclp_tty_flush_chars(struct tty_struct *tty) | |
279 | { | |
280 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 281 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
282 | sclp_tty_chars_count = 0; |
283 | } | |
284 | } | |
285 | ||
286 | /* | |
287 | * This routine returns the number of characters in the write buffer of the | |
288 | * SCLP driver. The provided number includes all characters that are stored | |
289 | * in the SCCB (will be written next time the SCLP is not busy) as well as | |
290 | * characters in the write buffer (will not be written as long as there is a | |
291 | * final line feed missing). | |
292 | */ | |
293 | static int | |
294 | sclp_tty_chars_in_buffer(struct tty_struct *tty) | |
295 | { | |
296 | unsigned long flags; | |
297 | struct list_head *l; | |
298 | struct sclp_buffer *t; | |
299 | int count; | |
300 | ||
301 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
302 | count = 0; | |
303 | if (sclp_ttybuf != NULL) | |
304 | count = sclp_chars_in_buffer(sclp_ttybuf); | |
305 | list_for_each(l, &sclp_tty_outqueue) { | |
306 | t = list_entry(l, struct sclp_buffer, list); | |
307 | count += sclp_chars_in_buffer(t); | |
308 | } | |
309 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
310 | return count; | |
311 | } | |
312 | ||
313 | /* | |
314 | * removes all content from buffers of low level driver | |
315 | */ | |
316 | static void | |
317 | sclp_tty_flush_buffer(struct tty_struct *tty) | |
318 | { | |
319 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 320 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
321 | sclp_tty_chars_count = 0; |
322 | } | |
323 | } | |
324 | ||
325 | /* | |
326 | * push input to tty | |
327 | */ | |
328 | static void | |
329 | sclp_tty_input(unsigned char* buf, unsigned int count) | |
330 | { | |
0ea63da2 | 331 | struct tty_struct *tty = tty_port_tty_get(&sclp_port); |
1da177e4 LT |
332 | unsigned int cchar; |
333 | ||
334 | /* | |
335 | * If this tty driver is currently closed | |
336 | * then throw the received input away. | |
337 | */ | |
0ea63da2 | 338 | if (tty == NULL) |
1da177e4 | 339 | return; |
0ea63da2 | 340 | cchar = ctrlchar_handle(buf, count, tty); |
1da177e4 LT |
341 | switch (cchar & CTRLCHAR_MASK) { |
342 | case CTRLCHAR_SYSRQ: | |
343 | break; | |
344 | case CTRLCHAR_CTRL: | |
0ea63da2 JS |
345 | tty_insert_flip_char(tty, cchar, TTY_NORMAL); |
346 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
347 | break; |
348 | case CTRLCHAR_NONE: | |
349 | /* send (normal) input to line discipline */ | |
1da177e4 | 350 | if (count < 2 || |
33f0f88f AC |
351 | (strncmp((const char *) buf + count - 2, "^n", 2) && |
352 | strncmp((const char *) buf + count - 2, "\252n", 2))) { | |
353 | /* add the auto \n */ | |
0ea63da2 JS |
354 | tty_insert_flip_string(tty, buf, count); |
355 | tty_insert_flip_char(tty, '\n', TTY_NORMAL); | |
1da177e4 | 356 | } else |
0ea63da2 JS |
357 | tty_insert_flip_string(tty, buf, count - 2); |
358 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
359 | break; |
360 | } | |
0ea63da2 | 361 | tty_kref_put(tty); |
1da177e4 LT |
362 | } |
363 | ||
364 | /* | |
365 | * get a EBCDIC string in upper/lower case, | |
366 | * find out characters in lower/upper case separated by a special character, | |
367 | * modifiy original string, | |
368 | * returns length of resulting string | |
369 | */ | |
095761d2 | 370 | static int sclp_switch_cases(unsigned char *buf, int count) |
1da177e4 LT |
371 | { |
372 | unsigned char *ip, *op; | |
373 | int toggle; | |
374 | ||
375 | /* initially changing case is off */ | |
376 | toggle = 0; | |
377 | ip = op = buf; | |
378 | while (count-- > 0) { | |
379 | /* compare with special character */ | |
095761d2 | 380 | if (*ip == CASE_DELIMITER) { |
1da177e4 | 381 | /* followed by another special character? */ |
095761d2 | 382 | if (count && ip[1] == CASE_DELIMITER) { |
1da177e4 LT |
383 | /* |
384 | * ... then put a single copy of the special | |
385 | * character to the output string | |
386 | */ | |
387 | *op++ = *ip++; | |
388 | count--; | |
389 | } else | |
390 | /* | |
391 | * ... special character follower by a normal | |
392 | * character toggles the case change behaviour | |
393 | */ | |
394 | toggle = ~toggle; | |
395 | /* skip special character */ | |
396 | ip++; | |
397 | } else | |
398 | /* not the special character */ | |
399 | if (toggle) | |
400 | /* but case switching is on */ | |
095761d2 | 401 | if (sclp_tty_tolower) |
1da177e4 LT |
402 | /* switch to uppercase */ |
403 | *op++ = _ebc_toupper[(int) *ip++]; | |
404 | else | |
405 | /* switch to lowercase */ | |
406 | *op++ = _ebc_tolower[(int) *ip++]; | |
407 | else | |
408 | /* no case switching, copy the character */ | |
409 | *op++ = *ip++; | |
410 | } | |
411 | /* return length of reformatted string. */ | |
412 | return op - buf; | |
413 | } | |
414 | ||
30c2df51 | 415 | static void sclp_get_input(struct gds_subvector *sv) |
1da177e4 | 416 | { |
30c2df51 | 417 | unsigned char *str; |
1da177e4 LT |
418 | int count; |
419 | ||
30c2df51 MS |
420 | str = (unsigned char *) (sv + 1); |
421 | count = sv->length - sizeof(*sv); | |
095761d2 | 422 | if (sclp_tty_tolower) |
30c2df51 MS |
423 | EBC_TOLOWER(str, count); |
424 | count = sclp_switch_cases(str, count); | |
1da177e4 | 425 | /* convert EBCDIC to ASCII (modify original input in SCCB) */ |
30c2df51 | 426 | sclp_ebcasc_str(str, count); |
1da177e4 | 427 | |
1da177e4 | 428 | /* transfer input to high level driver */ |
30c2df51 | 429 | sclp_tty_input(str, count); |
1da177e4 LT |
430 | } |
431 | ||
30c2df51 | 432 | static inline void sclp_eval_selfdeftextmsg(struct gds_subvector *sv) |
1da177e4 | 433 | { |
30c2df51 | 434 | void *end; |
1da177e4 | 435 | |
30c2df51 MS |
436 | end = (void *) sv + sv->length; |
437 | for (sv = sv + 1; (void *) sv < end; sv = (void *) sv + sv->length) | |
438 | if (sv->key == 0x30) | |
439 | sclp_get_input(sv); | |
1da177e4 LT |
440 | } |
441 | ||
30c2df51 | 442 | static inline void sclp_eval_textcmd(struct gds_vector *v) |
1da177e4 | 443 | { |
30c2df51 MS |
444 | struct gds_subvector *sv; |
445 | void *end; | |
1da177e4 | 446 | |
30c2df51 MS |
447 | end = (void *) v + v->length; |
448 | for (sv = (struct gds_subvector *) (v + 1); | |
449 | (void *) sv < end; sv = (void *) sv + sv->length) | |
450 | if (sv->key == GDS_KEY_SELFDEFTEXTMSG) | |
451 | sclp_eval_selfdeftextmsg(sv); | |
1da177e4 | 452 | |
1da177e4 LT |
453 | } |
454 | ||
30c2df51 | 455 | static inline void sclp_eval_cpmsu(struct gds_vector *v) |
1da177e4 | 456 | { |
30c2df51 | 457 | void *end; |
1da177e4 | 458 | |
30c2df51 MS |
459 | end = (void *) v + v->length; |
460 | for (v = v + 1; (void *) v < end; v = (void *) v + v->length) | |
461 | if (v->gds_id == GDS_ID_TEXTCMD) | |
462 | sclp_eval_textcmd(v); | |
1da177e4 LT |
463 | } |
464 | ||
465 | ||
30c2df51 | 466 | static inline void sclp_eval_mdsmu(struct gds_vector *v) |
1da177e4 | 467 | { |
30c2df51 MS |
468 | v = sclp_find_gds_vector(v + 1, (void *) v + v->length, GDS_ID_CPMSU); |
469 | if (v) | |
470 | sclp_eval_cpmsu(v); | |
1da177e4 LT |
471 | } |
472 | ||
30c2df51 | 473 | static void sclp_tty_receiver(struct evbuf_header *evbuf) |
1da177e4 | 474 | { |
30c2df51 | 475 | struct gds_vector *v; |
1da177e4 | 476 | |
30c2df51 MS |
477 | v = sclp_find_gds_vector(evbuf + 1, (void *) evbuf + evbuf->length, |
478 | GDS_ID_MDSMU); | |
479 | if (v) | |
480 | sclp_eval_mdsmu(v); | |
1da177e4 LT |
481 | } |
482 | ||
483 | static void | |
484 | sclp_tty_state_change(struct sclp_register *reg) | |
485 | { | |
486 | } | |
487 | ||
488 | static struct sclp_register sclp_input_event = | |
489 | { | |
6d4740c8 | 490 | .receive_mask = EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK, |
1da177e4 LT |
491 | .state_change_fn = sclp_tty_state_change, |
492 | .receiver_fn = sclp_tty_receiver | |
493 | }; | |
494 | ||
b68e31d0 | 495 | static const struct tty_operations sclp_ops = { |
1da177e4 LT |
496 | .open = sclp_tty_open, |
497 | .close = sclp_tty_close, | |
498 | .write = sclp_tty_write, | |
499 | .put_char = sclp_tty_put_char, | |
500 | .flush_chars = sclp_tty_flush_chars, | |
501 | .write_room = sclp_tty_write_room, | |
502 | .chars_in_buffer = sclp_tty_chars_in_buffer, | |
503 | .flush_buffer = sclp_tty_flush_buffer, | |
1da177e4 LT |
504 | }; |
505 | ||
2b67fc46 | 506 | static int __init |
1da177e4 LT |
507 | sclp_tty_init(void) |
508 | { | |
509 | struct tty_driver *driver; | |
510 | void *page; | |
511 | int i; | |
512 | int rc; | |
513 | ||
514 | if (!CONSOLE_IS_SCLP) | |
515 | return 0; | |
516 | driver = alloc_tty_driver(1); | |
517 | if (!driver) | |
518 | return -ENOMEM; | |
519 | ||
520 | rc = sclp_rw_init(); | |
521 | if (rc) { | |
1da177e4 LT |
522 | put_tty_driver(driver); |
523 | return rc; | |
524 | } | |
525 | /* Allocate pages for output buffering */ | |
526 | INIT_LIST_HEAD(&sclp_tty_pages); | |
527 | for (i = 0; i < MAX_KMEM_PAGES; i++) { | |
528 | page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
529 | if (page == NULL) { | |
530 | put_tty_driver(driver); | |
531 | return -ENOMEM; | |
532 | } | |
533 | list_add_tail((struct list_head *) page, &sclp_tty_pages); | |
534 | } | |
535 | INIT_LIST_HEAD(&sclp_tty_outqueue); | |
536 | spin_lock_init(&sclp_tty_lock); | |
1da177e4 LT |
537 | init_timer(&sclp_tty_timer); |
538 | sclp_ttybuf = NULL; | |
539 | sclp_tty_buffer_count = 0; | |
540 | if (MACHINE_IS_VM) { | |
541 | /* | |
542 | * save 4 characters for the CPU number | |
543 | * written at start of each line by VM/CP | |
544 | */ | |
095761d2 | 545 | sclp_tty_columns = 76; |
1da177e4 | 546 | /* case input lines to lowercase */ |
095761d2 | 547 | sclp_tty_tolower = 1; |
1da177e4 | 548 | } |
1da177e4 | 549 | sclp_tty_chars_count = 0; |
0ea63da2 | 550 | tty_port_init(&sclp_port); |
1da177e4 LT |
551 | |
552 | rc = sclp_register(&sclp_input_event); | |
553 | if (rc) { | |
554 | put_tty_driver(driver); | |
555 | return rc; | |
556 | } | |
557 | ||
1da177e4 LT |
558 | driver->driver_name = "sclp_line"; |
559 | driver->name = "sclp_line"; | |
560 | driver->major = TTY_MAJOR; | |
561 | driver->minor_start = 64; | |
562 | driver->type = TTY_DRIVER_TYPE_SYSTEM; | |
563 | driver->subtype = SYSTEM_TYPE_TTY; | |
564 | driver->init_termios = tty_std_termios; | |
565 | driver->init_termios.c_iflag = IGNBRK | IGNPAR; | |
566 | driver->init_termios.c_oflag = ONLCR | XTABS; | |
567 | driver->init_termios.c_lflag = ISIG | ECHO; | |
568 | driver->flags = TTY_DRIVER_REAL_RAW; | |
569 | tty_set_operations(driver, &sclp_ops); | |
570 | rc = tty_register_driver(driver); | |
571 | if (rc) { | |
1da177e4 LT |
572 | put_tty_driver(driver); |
573 | return rc; | |
574 | } | |
575 | sclp_tty_driver = driver; | |
576 | return 0; | |
577 | } | |
578 | module_init(sclp_tty_init); |