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 | 67 | tty->driver_data = NULL; |
d6c53c0e | 68 | sclp_port.low_latency = 0; |
1da177e4 LT |
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 | |
18d1a7f6 MS |
87 | * a string of newlines. Every newline creates a new message which |
88 | * needs 82 bytes. | |
1da177e4 LT |
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) | |
18d1a7f6 | 100 | count = sclp_buffer_space(sclp_ttybuf) / sizeof(struct msg_buf); |
1da177e4 | 101 | list_for_each(l, &sclp_tty_pages) |
18d1a7f6 | 102 | count += NR_EMPTY_MSG_PER_SCCB; |
1da177e4 LT |
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 | { | |
110 | unsigned long flags; | |
111 | void *page; | |
112 | ||
113 | do { | |
114 | page = sclp_unmake_buffer(buffer); | |
115 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
116 | /* Remove buffer from outqueue */ | |
117 | list_del(&buffer->list); | |
118 | sclp_tty_buffer_count--; | |
119 | list_add_tail((struct list_head *) page, &sclp_tty_pages); | |
120 | /* Check if there is a pending buffer on the out queue. */ | |
121 | buffer = NULL; | |
122 | if (!list_empty(&sclp_tty_outqueue)) | |
123 | buffer = list_entry(sclp_tty_outqueue.next, | |
124 | struct sclp_buffer, list); | |
125 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
126 | } while (buffer && sclp_emit_buffer(buffer, sclp_ttybuf_callback)); | |
6aad04f2 JS |
127 | |
128 | tty_port_tty_wakeup(&sclp_port); | |
1da177e4 LT |
129 | } |
130 | ||
131 | static inline void | |
132 | __sclp_ttybuf_emit(struct sclp_buffer *buffer) | |
133 | { | |
134 | unsigned long flags; | |
135 | int count; | |
136 | int rc; | |
137 | ||
138 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
139 | list_add_tail(&buffer->list, &sclp_tty_outqueue); | |
140 | count = sclp_tty_buffer_count++; | |
141 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
142 | if (count) | |
143 | return; | |
144 | rc = sclp_emit_buffer(buffer, sclp_ttybuf_callback); | |
145 | if (rc) | |
146 | sclp_ttybuf_callback(buffer, rc); | |
147 | } | |
148 | ||
149 | /* | |
150 | * When this routine is called from the timer then we flush the | |
151 | * temporary write buffer. | |
152 | */ | |
153 | static void | |
154 | sclp_tty_timeout(unsigned long data) | |
155 | { | |
156 | unsigned long flags; | |
157 | struct sclp_buffer *buf; | |
158 | ||
159 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
160 | buf = sclp_ttybuf; | |
161 | sclp_ttybuf = NULL; | |
162 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
163 | ||
164 | if (buf != NULL) { | |
165 | __sclp_ttybuf_emit(buf); | |
166 | } | |
167 | } | |
168 | ||
169 | /* | |
170 | * Write a string to the sclp tty. | |
171 | */ | |
5e34599f | 172 | static int sclp_tty_write_string(const unsigned char *str, int count, int may_fail) |
1da177e4 LT |
173 | { |
174 | unsigned long flags; | |
175 | void *page; | |
176 | int written; | |
5e34599f | 177 | int overall_written; |
1da177e4 LT |
178 | struct sclp_buffer *buf; |
179 | ||
180 | if (count <= 0) | |
5e34599f HC |
181 | return 0; |
182 | overall_written = 0; | |
1da177e4 LT |
183 | spin_lock_irqsave(&sclp_tty_lock, flags); |
184 | do { | |
185 | /* Create a sclp output buffer if none exists yet */ | |
186 | if (sclp_ttybuf == NULL) { | |
187 | while (list_empty(&sclp_tty_pages)) { | |
188 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
5e34599f HC |
189 | if (may_fail) |
190 | goto out; | |
1da177e4 | 191 | else |
5e34599f | 192 | sclp_sync_wait(); |
1da177e4 LT |
193 | spin_lock_irqsave(&sclp_tty_lock, flags); |
194 | } | |
195 | page = sclp_tty_pages.next; | |
196 | list_del((struct list_head *) page); | |
095761d2 HC |
197 | sclp_ttybuf = sclp_make_buffer(page, sclp_tty_columns, |
198 | SPACES_PER_TAB); | |
1da177e4 LT |
199 | } |
200 | /* try to write the string to the current output buffer */ | |
201 | written = sclp_write(sclp_ttybuf, str, count); | |
5e34599f | 202 | overall_written += written; |
1da177e4 LT |
203 | if (written == count) |
204 | break; | |
205 | /* | |
206 | * Not all characters could be written to the current | |
207 | * output buffer. Emit the buffer, create a new buffer | |
208 | * and then output the rest of the string. | |
209 | */ | |
210 | buf = sclp_ttybuf; | |
211 | sclp_ttybuf = NULL; | |
212 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
213 | __sclp_ttybuf_emit(buf); | |
214 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
215 | str += written; | |
216 | count -= written; | |
217 | } while (count > 0); | |
218 | /* Setup timer to output current console buffer after 1/10 second */ | |
095761d2 HC |
219 | if (sclp_ttybuf && sclp_chars_in_buffer(sclp_ttybuf) && |
220 | !timer_pending(&sclp_tty_timer)) { | |
221 | init_timer(&sclp_tty_timer); | |
222 | sclp_tty_timer.function = sclp_tty_timeout; | |
223 | sclp_tty_timer.data = 0UL; | |
224 | sclp_tty_timer.expires = jiffies + HZ/10; | |
225 | add_timer(&sclp_tty_timer); | |
1da177e4 LT |
226 | } |
227 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
5e34599f HC |
228 | out: |
229 | return overall_written; | |
1da177e4 LT |
230 | } |
231 | ||
232 | /* | |
233 | * This routine is called by the kernel to write a series of characters to the | |
234 | * tty device. The characters may come from user space or kernel space. This | |
235 | * routine will return the number of characters actually accepted for writing. | |
236 | */ | |
237 | static int | |
238 | sclp_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
239 | { | |
240 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 241 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
242 | sclp_tty_chars_count = 0; |
243 | } | |
5e34599f | 244 | return sclp_tty_write_string(buf, count, 1); |
1da177e4 LT |
245 | } |
246 | ||
247 | /* | |
248 | * This routine is called by the kernel to write a single character to the tty | |
249 | * device. If the kernel uses this routine, it must call the flush_chars() | |
250 | * routine (if defined) when it is done stuffing characters into the driver. | |
251 | * | |
252 | * Characters provided to sclp_tty_put_char() are buffered by the SCLP driver. | |
253 | * If the given character is a '\n' the contents of the SCLP write buffer | |
254 | * - including previous characters from sclp_tty_put_char() and strings from | |
255 | * sclp_write() without final '\n' - will be written. | |
256 | */ | |
9e7c9a19 | 257 | static int |
1da177e4 LT |
258 | sclp_tty_put_char(struct tty_struct *tty, unsigned char ch) |
259 | { | |
260 | sclp_tty_chars[sclp_tty_chars_count++] = ch; | |
261 | if (ch == '\n' || sclp_tty_chars_count >= SCLP_TTY_BUF_SIZE) { | |
5e34599f | 262 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 | 263 | sclp_tty_chars_count = 0; |
5e34599f HC |
264 | } |
265 | return 1; | |
1da177e4 LT |
266 | } |
267 | ||
268 | /* | |
269 | * This routine is called by the kernel after it has written a series of | |
270 | * characters to the tty device using put_char(). | |
271 | */ | |
272 | static void | |
273 | sclp_tty_flush_chars(struct tty_struct *tty) | |
274 | { | |
275 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 276 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
277 | sclp_tty_chars_count = 0; |
278 | } | |
279 | } | |
280 | ||
281 | /* | |
282 | * This routine returns the number of characters in the write buffer of the | |
283 | * SCLP driver. The provided number includes all characters that are stored | |
284 | * in the SCCB (will be written next time the SCLP is not busy) as well as | |
285 | * characters in the write buffer (will not be written as long as there is a | |
286 | * final line feed missing). | |
287 | */ | |
288 | static int | |
289 | sclp_tty_chars_in_buffer(struct tty_struct *tty) | |
290 | { | |
291 | unsigned long flags; | |
292 | struct list_head *l; | |
293 | struct sclp_buffer *t; | |
294 | int count; | |
295 | ||
296 | spin_lock_irqsave(&sclp_tty_lock, flags); | |
297 | count = 0; | |
298 | if (sclp_ttybuf != NULL) | |
299 | count = sclp_chars_in_buffer(sclp_ttybuf); | |
300 | list_for_each(l, &sclp_tty_outqueue) { | |
301 | t = list_entry(l, struct sclp_buffer, list); | |
302 | count += sclp_chars_in_buffer(t); | |
303 | } | |
304 | spin_unlock_irqrestore(&sclp_tty_lock, flags); | |
305 | return count; | |
306 | } | |
307 | ||
308 | /* | |
309 | * removes all content from buffers of low level driver | |
310 | */ | |
311 | static void | |
312 | sclp_tty_flush_buffer(struct tty_struct *tty) | |
313 | { | |
314 | if (sclp_tty_chars_count > 0) { | |
5e34599f | 315 | sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); |
1da177e4 LT |
316 | sclp_tty_chars_count = 0; |
317 | } | |
318 | } | |
319 | ||
320 | /* | |
321 | * push input to tty | |
322 | */ | |
323 | static void | |
324 | sclp_tty_input(unsigned char* buf, unsigned int count) | |
325 | { | |
0ea63da2 | 326 | struct tty_struct *tty = tty_port_tty_get(&sclp_port); |
1da177e4 LT |
327 | unsigned int cchar; |
328 | ||
329 | /* | |
330 | * If this tty driver is currently closed | |
331 | * then throw the received input away. | |
332 | */ | |
0ea63da2 | 333 | if (tty == NULL) |
1da177e4 | 334 | return; |
0ea63da2 | 335 | cchar = ctrlchar_handle(buf, count, tty); |
1da177e4 LT |
336 | switch (cchar & CTRLCHAR_MASK) { |
337 | case CTRLCHAR_SYSRQ: | |
338 | break; | |
339 | case CTRLCHAR_CTRL: | |
92a19f9c | 340 | tty_insert_flip_char(&sclp_port, cchar, TTY_NORMAL); |
2e124b4a | 341 | tty_flip_buffer_push(&sclp_port); |
1da177e4 LT |
342 | break; |
343 | case CTRLCHAR_NONE: | |
344 | /* send (normal) input to line discipline */ | |
1da177e4 | 345 | if (count < 2 || |
33f0f88f AC |
346 | (strncmp((const char *) buf + count - 2, "^n", 2) && |
347 | strncmp((const char *) buf + count - 2, "\252n", 2))) { | |
348 | /* add the auto \n */ | |
05c7cd39 | 349 | tty_insert_flip_string(&sclp_port, buf, count); |
92a19f9c | 350 | tty_insert_flip_char(&sclp_port, '\n', TTY_NORMAL); |
1da177e4 | 351 | } else |
05c7cd39 | 352 | tty_insert_flip_string(&sclp_port, buf, count - 2); |
2e124b4a | 353 | tty_flip_buffer_push(&sclp_port); |
1da177e4 LT |
354 | break; |
355 | } | |
0ea63da2 | 356 | tty_kref_put(tty); |
1da177e4 LT |
357 | } |
358 | ||
359 | /* | |
360 | * get a EBCDIC string in upper/lower case, | |
361 | * find out characters in lower/upper case separated by a special character, | |
362 | * modifiy original string, | |
363 | * returns length of resulting string | |
364 | */ | |
095761d2 | 365 | static int sclp_switch_cases(unsigned char *buf, int count) |
1da177e4 LT |
366 | { |
367 | unsigned char *ip, *op; | |
368 | int toggle; | |
369 | ||
370 | /* initially changing case is off */ | |
371 | toggle = 0; | |
372 | ip = op = buf; | |
373 | while (count-- > 0) { | |
374 | /* compare with special character */ | |
095761d2 | 375 | if (*ip == CASE_DELIMITER) { |
1da177e4 | 376 | /* followed by another special character? */ |
095761d2 | 377 | if (count && ip[1] == CASE_DELIMITER) { |
1da177e4 LT |
378 | /* |
379 | * ... then put a single copy of the special | |
380 | * character to the output string | |
381 | */ | |
382 | *op++ = *ip++; | |
383 | count--; | |
384 | } else | |
385 | /* | |
386 | * ... special character follower by a normal | |
387 | * character toggles the case change behaviour | |
388 | */ | |
389 | toggle = ~toggle; | |
390 | /* skip special character */ | |
391 | ip++; | |
392 | } else | |
393 | /* not the special character */ | |
394 | if (toggle) | |
395 | /* but case switching is on */ | |
095761d2 | 396 | if (sclp_tty_tolower) |
1da177e4 LT |
397 | /* switch to uppercase */ |
398 | *op++ = _ebc_toupper[(int) *ip++]; | |
399 | else | |
400 | /* switch to lowercase */ | |
401 | *op++ = _ebc_tolower[(int) *ip++]; | |
402 | else | |
403 | /* no case switching, copy the character */ | |
404 | *op++ = *ip++; | |
405 | } | |
406 | /* return length of reformatted string. */ | |
407 | return op - buf; | |
408 | } | |
409 | ||
30c2df51 | 410 | static void sclp_get_input(struct gds_subvector *sv) |
1da177e4 | 411 | { |
30c2df51 | 412 | unsigned char *str; |
1da177e4 LT |
413 | int count; |
414 | ||
30c2df51 MS |
415 | str = (unsigned char *) (sv + 1); |
416 | count = sv->length - sizeof(*sv); | |
095761d2 | 417 | if (sclp_tty_tolower) |
30c2df51 MS |
418 | EBC_TOLOWER(str, count); |
419 | count = sclp_switch_cases(str, count); | |
1da177e4 | 420 | /* convert EBCDIC to ASCII (modify original input in SCCB) */ |
30c2df51 | 421 | sclp_ebcasc_str(str, count); |
1da177e4 | 422 | |
1da177e4 | 423 | /* transfer input to high level driver */ |
30c2df51 | 424 | sclp_tty_input(str, count); |
1da177e4 LT |
425 | } |
426 | ||
30c2df51 | 427 | static inline void sclp_eval_selfdeftextmsg(struct gds_subvector *sv) |
1da177e4 | 428 | { |
30c2df51 | 429 | void *end; |
1da177e4 | 430 | |
30c2df51 MS |
431 | end = (void *) sv + sv->length; |
432 | for (sv = sv + 1; (void *) sv < end; sv = (void *) sv + sv->length) | |
433 | if (sv->key == 0x30) | |
434 | sclp_get_input(sv); | |
1da177e4 LT |
435 | } |
436 | ||
30c2df51 | 437 | static inline void sclp_eval_textcmd(struct gds_vector *v) |
1da177e4 | 438 | { |
30c2df51 MS |
439 | struct gds_subvector *sv; |
440 | void *end; | |
1da177e4 | 441 | |
30c2df51 MS |
442 | end = (void *) v + v->length; |
443 | for (sv = (struct gds_subvector *) (v + 1); | |
444 | (void *) sv < end; sv = (void *) sv + sv->length) | |
445 | if (sv->key == GDS_KEY_SELFDEFTEXTMSG) | |
446 | sclp_eval_selfdeftextmsg(sv); | |
1da177e4 | 447 | |
1da177e4 LT |
448 | } |
449 | ||
30c2df51 | 450 | static inline void sclp_eval_cpmsu(struct gds_vector *v) |
1da177e4 | 451 | { |
30c2df51 | 452 | void *end; |
1da177e4 | 453 | |
30c2df51 MS |
454 | end = (void *) v + v->length; |
455 | for (v = v + 1; (void *) v < end; v = (void *) v + v->length) | |
456 | if (v->gds_id == GDS_ID_TEXTCMD) | |
457 | sclp_eval_textcmd(v); | |
1da177e4 LT |
458 | } |
459 | ||
460 | ||
30c2df51 | 461 | static inline void sclp_eval_mdsmu(struct gds_vector *v) |
1da177e4 | 462 | { |
30c2df51 MS |
463 | v = sclp_find_gds_vector(v + 1, (void *) v + v->length, GDS_ID_CPMSU); |
464 | if (v) | |
465 | sclp_eval_cpmsu(v); | |
1da177e4 LT |
466 | } |
467 | ||
30c2df51 | 468 | static void sclp_tty_receiver(struct evbuf_header *evbuf) |
1da177e4 | 469 | { |
30c2df51 | 470 | struct gds_vector *v; |
1da177e4 | 471 | |
30c2df51 MS |
472 | v = sclp_find_gds_vector(evbuf + 1, (void *) evbuf + evbuf->length, |
473 | GDS_ID_MDSMU); | |
474 | if (v) | |
475 | sclp_eval_mdsmu(v); | |
1da177e4 LT |
476 | } |
477 | ||
478 | static void | |
479 | sclp_tty_state_change(struct sclp_register *reg) | |
480 | { | |
481 | } | |
482 | ||
483 | static struct sclp_register sclp_input_event = | |
484 | { | |
6d4740c8 | 485 | .receive_mask = EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK, |
1da177e4 LT |
486 | .state_change_fn = sclp_tty_state_change, |
487 | .receiver_fn = sclp_tty_receiver | |
488 | }; | |
489 | ||
b68e31d0 | 490 | static const struct tty_operations sclp_ops = { |
1da177e4 LT |
491 | .open = sclp_tty_open, |
492 | .close = sclp_tty_close, | |
493 | .write = sclp_tty_write, | |
494 | .put_char = sclp_tty_put_char, | |
495 | .flush_chars = sclp_tty_flush_chars, | |
496 | .write_room = sclp_tty_write_room, | |
497 | .chars_in_buffer = sclp_tty_chars_in_buffer, | |
498 | .flush_buffer = sclp_tty_flush_buffer, | |
1da177e4 LT |
499 | }; |
500 | ||
2b67fc46 | 501 | static int __init |
1da177e4 LT |
502 | sclp_tty_init(void) |
503 | { | |
504 | struct tty_driver *driver; | |
505 | void *page; | |
506 | int i; | |
507 | int rc; | |
508 | ||
509 | if (!CONSOLE_IS_SCLP) | |
510 | return 0; | |
511 | driver = alloc_tty_driver(1); | |
512 | if (!driver) | |
513 | return -ENOMEM; | |
514 | ||
515 | rc = sclp_rw_init(); | |
516 | if (rc) { | |
1da177e4 LT |
517 | put_tty_driver(driver); |
518 | return rc; | |
519 | } | |
520 | /* Allocate pages for output buffering */ | |
521 | INIT_LIST_HEAD(&sclp_tty_pages); | |
522 | for (i = 0; i < MAX_KMEM_PAGES; i++) { | |
523 | page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
524 | if (page == NULL) { | |
525 | put_tty_driver(driver); | |
526 | return -ENOMEM; | |
527 | } | |
528 | list_add_tail((struct list_head *) page, &sclp_tty_pages); | |
529 | } | |
530 | INIT_LIST_HEAD(&sclp_tty_outqueue); | |
531 | spin_lock_init(&sclp_tty_lock); | |
1da177e4 LT |
532 | init_timer(&sclp_tty_timer); |
533 | sclp_ttybuf = NULL; | |
534 | sclp_tty_buffer_count = 0; | |
535 | if (MACHINE_IS_VM) { | |
536 | /* | |
537 | * save 4 characters for the CPU number | |
538 | * written at start of each line by VM/CP | |
539 | */ | |
095761d2 | 540 | sclp_tty_columns = 76; |
1da177e4 | 541 | /* case input lines to lowercase */ |
095761d2 | 542 | sclp_tty_tolower = 1; |
1da177e4 | 543 | } |
1da177e4 | 544 | sclp_tty_chars_count = 0; |
1da177e4 LT |
545 | |
546 | rc = sclp_register(&sclp_input_event); | |
547 | if (rc) { | |
548 | put_tty_driver(driver); | |
549 | return rc; | |
550 | } | |
551 | ||
191c5f10 JS |
552 | tty_port_init(&sclp_port); |
553 | ||
1da177e4 LT |
554 | driver->driver_name = "sclp_line"; |
555 | driver->name = "sclp_line"; | |
556 | driver->major = TTY_MAJOR; | |
557 | driver->minor_start = 64; | |
558 | driver->type = TTY_DRIVER_TYPE_SYSTEM; | |
559 | driver->subtype = SYSTEM_TYPE_TTY; | |
560 | driver->init_termios = tty_std_termios; | |
561 | driver->init_termios.c_iflag = IGNBRK | IGNPAR; | |
b8a2bbdf | 562 | driver->init_termios.c_oflag = ONLCR; |
1da177e4 LT |
563 | driver->init_termios.c_lflag = ISIG | ECHO; |
564 | driver->flags = TTY_DRIVER_REAL_RAW; | |
565 | tty_set_operations(driver, &sclp_ops); | |
b19e2ca7 | 566 | tty_port_link_device(&sclp_port, driver, 0); |
1da177e4 LT |
567 | rc = tty_register_driver(driver); |
568 | if (rc) { | |
1da177e4 | 569 | put_tty_driver(driver); |
191c5f10 | 570 | tty_port_destroy(&sclp_port); |
1da177e4 LT |
571 | return rc; |
572 | } | |
573 | sclp_tty_driver = driver; | |
574 | return 0; | |
575 | } | |
576 | module_init(sclp_tty_init); |