Commit | Line | Data |
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6f05e69e | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * IBM/3270 Driver - tty functions. |
4 | * | |
5 | * Author(s): | |
6 | * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) | |
7 | * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> | |
a53c8fab | 8 | * -- Copyright IBM Corp. 2003 |
1da177e4 LT |
9 | */ |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/kdev_t.h> | |
14 | #include <linux/tty.h> | |
15 | #include <linux/vt_kern.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/console.h> | |
18 | #include <linux/interrupt.h> | |
4d334fd1 | 19 | #include <linux/workqueue.h> |
c17fe081 SS |
20 | #include <linux/panic_notifier.h> |
21 | #include <linux/reboot.h> | |
1da177e4 | 22 | #include <linux/slab.h> |
57c8a661 | 23 | #include <linux/memblock.h> |
9d4bfd41 | 24 | #include <linux/compat.h> |
1da177e4 LT |
25 | |
26 | #include <asm/ccwdev.h> | |
27 | #include <asm/cio.h> | |
28 | #include <asm/ebcdic.h> | |
c17fe081 | 29 | #include <asm/cpcmd.h> |
7c0f6ba6 | 30 | #include <linux/uaccess.h> |
1da177e4 | 31 | |
1da177e4 LT |
32 | #include "raw3270.h" |
33 | #include "keyboard.h" | |
34 | ||
35 | #define TTY3270_CHAR_BUF_SIZE 256 | |
9c138af9 | 36 | #define TTY3270_OUTPUT_BUFFER_SIZE 4096 |
1da177e4 LT |
37 | #define TTY3270_STRING_PAGES 5 |
38 | ||
b2057c87 SS |
39 | #define TTY3270_SCREEN_PAGES 8 /* has to be power-of-two */ |
40 | ||
c17fe081 | 41 | static struct tty_driver *tty3270_driver; |
1da177e4 | 42 | static int tty3270_max_index; |
c17fe081 | 43 | static struct tty3270 *condev; |
2b67fc46 | 44 | static struct raw3270_fn tty3270_fn; |
1da177e4 | 45 | |
c2e9375e | 46 | struct tty3270_attribute { |
94dbb0a7 | 47 | unsigned char alternate_charset:1; /* Graphics charset */ |
4043ea22 SS |
48 | unsigned char highlight; /* Blink/reverse/underscore */ |
49 | unsigned char f_color; /* Foreground color */ | |
50 | unsigned char b_color; /* Background color */ | |
c2e9375e SS |
51 | }; |
52 | ||
1da177e4 LT |
53 | struct tty3270_cell { |
54 | unsigned char character; | |
c2e9375e | 55 | struct tty3270_attribute attributes; |
1da177e4 LT |
56 | }; |
57 | ||
58 | struct tty3270_line { | |
59 | struct tty3270_cell *cells; | |
60 | int len; | |
b2057c87 | 61 | int dirty; |
1da177e4 LT |
62 | }; |
63 | ||
cbb36313 SS |
64 | static const unsigned char sfq_read_partition[] = { |
65 | 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | #define ESCAPE_NPAR 8 |
69 | ||
70 | /* | |
71 | * The main tty view data structure. | |
72 | * FIXME: | |
73 | * 1) describe line orientation & lines list concept against screen | |
74 | * 2) describe conversion of screen to lines | |
75 | * 3) describe line format. | |
76 | */ | |
77 | struct tty3270 { | |
78 | struct raw3270_view view; | |
ba186e7d | 79 | struct tty_port port; |
1da177e4 LT |
80 | void **freemem_pages; /* Array of pages used for freemem. */ |
81 | struct list_head freemem; /* List of free memory for strings. */ | |
82 | ||
83 | /* Output stuff. */ | |
84 | struct list_head lines; /* List of lines. */ | |
1da177e4 LT |
85 | unsigned char wcc; /* Write control character. */ |
86 | int nr_lines; /* # lines in list. */ | |
87 | int nr_up; /* # lines up in history. */ | |
88 | unsigned long update_flags; /* Update indication bits. */ | |
1da177e4 LT |
89 | struct raw3270_request *write; /* Single write request. */ |
90 | struct timer_list timer; /* Output delay timer. */ | |
ec1b0a33 | 91 | char *converted_line; /* RAW 3270 data stream */ |
9c138af9 SS |
92 | unsigned int line_view_start; /* Start of visible area */ |
93 | unsigned int line_write_start; /* current write position */ | |
1da177e4 LT |
94 | |
95 | /* Current tty screen. */ | |
96 | unsigned int cx, cy; /* Current output position. */ | |
c2e9375e SS |
97 | struct tty3270_attribute attributes; |
98 | struct tty3270_attribute saved_attributes; | |
b2057c87 | 99 | int allocated_lines; |
1da177e4 LT |
100 | struct tty3270_line *screen; |
101 | ||
102 | /* Input stuff. */ | |
103 | struct string *prompt; /* Output string for input area. */ | |
104 | struct string *input; /* Input string for read request. */ | |
105 | struct raw3270_request *read; /* Single read request. */ | |
106 | struct raw3270_request *kreset; /* Single keyboard reset request. */ | |
cbb36313 | 107 | struct raw3270_request *readpartreq; |
1da177e4 LT |
108 | unsigned char inattr; /* Visible/invisible input. */ |
109 | int throttle, attn; /* tty throttle/unthrottle. */ | |
110 | struct tasklet_struct readlet; /* Tasklet to issue read request. */ | |
0c756914 | 111 | struct tasklet_struct hanglet; /* Tasklet to hang up the tty. */ |
1da177e4 LT |
112 | struct kbd_data *kbd; /* key_maps stuff. */ |
113 | ||
114 | /* Escape sequence parsing. */ | |
115 | int esc_state, esc_ques, esc_npar; | |
116 | int esc_par[ESCAPE_NPAR]; | |
117 | unsigned int saved_cx, saved_cy; | |
1da177e4 LT |
118 | |
119 | /* Command recalling. */ | |
120 | struct list_head rcl_lines; /* List of recallable lines. */ | |
121 | struct list_head *rcl_walk; /* Point in rcl_lines list. */ | |
122 | int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ | |
123 | ||
124 | /* Character array for put_char/flush_chars. */ | |
125 | unsigned int char_count; | |
126 | char char_buf[TTY3270_CHAR_BUF_SIZE]; | |
127 | }; | |
128 | ||
129 | /* tty3270->update_flags. See tty3270_update for details. */ | |
130 | #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ | |
1da177e4 LT |
131 | #define TTY_UPDATE_INPUT 4 /* Update input line. */ |
132 | #define TTY_UPDATE_STATUS 8 /* Update status line. */ | |
205d7ab9 | 133 | #define TTY_UPDATE_ALL 16 /* Recreate screen. */ |
1da177e4 | 134 | |
9eb99b94 | 135 | #define TTY3270_INPUT_AREA_ROWS 2 |
f77f936a | 136 | |
1da177e4 LT |
137 | /* |
138 | * Setup timeout for a device. On timeout trigger an update. | |
139 | */ | |
2b67fc46 | 140 | static void tty3270_set_timer(struct tty3270 *tp, int expires) |
1da177e4 | 141 | { |
03439e7d | 142 | mod_timer(&tp->timer, jiffies + expires); |
1da177e4 LT |
143 | } |
144 | ||
9eb99b94 SS |
145 | static int tty3270_tty_rows(struct tty3270 *tp) |
146 | { | |
147 | return tp->view.rows - TTY3270_INPUT_AREA_ROWS; | |
148 | } | |
149 | ||
ae657244 SS |
150 | static char *tty3270_add_ba(struct tty3270 *tp, char *cp, char order, int x, int y) |
151 | { | |
152 | *cp++ = order; | |
153 | raw3270_buffer_address(tp->view.dev, cp, x, y); | |
154 | return cp + 2; | |
155 | } | |
156 | ||
157 | static char *tty3270_add_ra(struct tty3270 *tp, char *cp, int x, int y, char c) | |
158 | { | |
159 | cp = tty3270_add_ba(tp, cp, TO_RA, x, y); | |
160 | *cp++ = c; | |
161 | return cp; | |
162 | } | |
163 | ||
164 | static char *tty3270_add_sa(struct tty3270 *tp, char *cp, char attr, char value) | |
165 | { | |
166 | *cp++ = TO_SA; | |
167 | *cp++ = attr; | |
168 | *cp++ = value; | |
169 | return cp; | |
170 | } | |
171 | ||
172 | static char *tty3270_add_ge(struct tty3270 *tp, char *cp, char c) | |
173 | { | |
174 | *cp++ = TO_GE; | |
175 | *cp++ = c; | |
176 | return cp; | |
177 | } | |
178 | ||
ec1b0a33 SS |
179 | static char *tty3270_add_sf(struct tty3270 *tp, char *cp, char type) |
180 | { | |
181 | *cp++ = TO_SF; | |
182 | *cp++ = type; | |
183 | return cp; | |
184 | } | |
185 | ||
9c138af9 SS |
186 | static int tty3270_line_increment(struct tty3270 *tp, unsigned int line, unsigned int incr) |
187 | { | |
188 | return (line + incr) & (tp->allocated_lines - 1); | |
189 | } | |
190 | ||
191 | static struct tty3270_line *tty3270_get_write_line(struct tty3270 *tp, unsigned int num) | |
192 | { | |
193 | return tp->screen + tty3270_line_increment(tp, tp->line_write_start, num); | |
194 | } | |
195 | ||
196 | static struct tty3270_line *tty3270_get_view_line(struct tty3270 *tp, unsigned int num) | |
197 | { | |
198 | return tp->screen + tty3270_line_increment(tp, tp->line_view_start, num - tp->nr_up); | |
199 | } | |
200 | ||
1da177e4 LT |
201 | /* |
202 | * The input line are the two last lines of the screen. | |
203 | */ | |
e6d98bb8 | 204 | static void tty3270_update_prompt(struct tty3270 *tp, char *input, int count) |
1da177e4 LT |
205 | { |
206 | struct string *line; | |
1da177e4 LT |
207 | |
208 | line = tp->prompt; | |
209 | if (count != 0) | |
210 | line->string[5] = TF_INMDT; | |
211 | else | |
212 | line->string[5] = tp->inattr; | |
213 | if (count > tp->view.cols * 2 - 11) | |
214 | count = tp->view.cols * 2 - 11; | |
215 | memcpy(line->string + 6, input, count); | |
216 | line->string[6 + count] = TO_IC; | |
217 | /* Clear to end of input line. */ | |
218 | if (count < tp->view.cols * 2 - 11) { | |
ae657244 | 219 | tty3270_add_ra(tp, line->string + count + 7, -9, -1, 0); |
1da177e4 LT |
220 | line->len = 11 + count; |
221 | } else | |
222 | line->len = 7 + count; | |
223 | tp->update_flags |= TTY_UPDATE_INPUT; | |
224 | } | |
225 | ||
e6d98bb8 | 226 | static void tty3270_create_prompt(struct tty3270 *tp) |
1da177e4 LT |
227 | { |
228 | static const unsigned char blueprint[] = | |
229 | { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, | |
230 | /* empty input string */ | |
231 | TO_IC, TO_RA, 0, 0, 0 }; | |
232 | struct string *line; | |
1da177e4 LT |
233 | |
234 | line = alloc_string(&tp->freemem, | |
235 | sizeof(blueprint) + tp->view.cols * 2 - 9); | |
236 | tp->prompt = line; | |
237 | tp->inattr = TF_INPUT; | |
238 | /* Copy blueprint to status line */ | |
239 | memcpy(line->string, blueprint, sizeof(blueprint)); | |
240 | line->len = sizeof(blueprint); | |
241 | /* Set output offsets. */ | |
f77f936a SS |
242 | |
243 | raw3270_buffer_address(tp->view.dev, line->string + 1, 0, -2); | |
244 | raw3270_buffer_address(tp->view.dev, line->string + 8, -9, -1); | |
1da177e4 LT |
245 | |
246 | /* Allocate input string for reading. */ | |
247 | tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); | |
248 | } | |
249 | ||
ae657244 SS |
250 | /* |
251 | * The status line is the last line of the screen. It shows the string | |
252 | * "Running"/"Holding" in the lower right corner of the screen. | |
253 | */ | |
ec1b0a33 | 254 | static int tty3270_add_status(struct tty3270 *tp) |
1da177e4 | 255 | { |
ec1b0a33 SS |
256 | char *cp = tp->converted_line; |
257 | int len; | |
1da177e4 | 258 | |
ec1b0a33 SS |
259 | cp = tty3270_add_ba(tp, cp, TO_SBA, -9, -1); |
260 | cp = tty3270_add_sf(tp, cp, TF_LOG); | |
261 | cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_GREEN); | |
262 | len = sprintf(cp, tp->nr_up ? "History" : "Running"); | |
263 | codepage_convert(tp->view.ascebc, cp, len); | |
264 | cp += len; | |
265 | cp = tty3270_add_sf(tp, cp, TF_LOG); | |
266 | cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_RESET); | |
267 | return cp - (char *)tp->converted_line; | |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
271 | * Set output offsets to 3270 datastream fragment of a tty string. | |
272 | * (TO_SBA offset at the start and TO_RA offset at the end of the string) | |
273 | */ | |
9c138af9 | 274 | static void tty3270_update_string(struct tty3270 *tp, char *line, int len, int nr) |
1da177e4 LT |
275 | { |
276 | unsigned char *cp; | |
9c138af9 SS |
277 | raw3270_buffer_address(tp->view.dev, line + 1, 0, nr); |
278 | cp = line + len - 4; | |
1da177e4 | 279 | if (*cp == TO_RA) |
f77f936a | 280 | raw3270_buffer_address(tp->view.dev, cp + 1, 0, nr + 1); |
1da177e4 LT |
281 | } |
282 | ||
1da177e4 LT |
283 | /* |
284 | * Alloc string for size bytes. If there is not enough room in | |
285 | * freemem, free strings until there is room. | |
286 | */ | |
e6d98bb8 | 287 | static struct string *tty3270_alloc_string(struct tty3270 *tp, size_t size) |
1da177e4 LT |
288 | { |
289 | struct string *s, *n; | |
290 | ||
291 | s = alloc_string(&tp->freemem, size); | |
292 | if (s) | |
293 | return s; | |
294 | list_for_each_entry_safe(s, n, &tp->lines, list) { | |
1da177e4 | 295 | list_del(&s->list); |
1da177e4 LT |
296 | if (free_string(&tp->freemem, s) >= size) |
297 | break; | |
298 | } | |
9c138af9 | 299 | return alloc_string(&tp->freemem, size); |
1da177e4 LT |
300 | } |
301 | ||
e6d98bb8 | 302 | static void tty3270_blank_screen(struct tty3270 *tp) |
7e36eff1 | 303 | { |
9c138af9 | 304 | struct tty3270_line *line; |
7e36eff1 MS |
305 | int i; |
306 | ||
9c138af9 SS |
307 | for (i = 0; i < tty3270_tty_rows(tp); i++) { |
308 | line = tty3270_get_write_line(tp, i); | |
309 | line->len = 0; | |
310 | line->dirty = 1; | |
7e36eff1 | 311 | } |
9c138af9 | 312 | tp->nr_up = 0; |
7e36eff1 MS |
313 | } |
314 | ||
1da177e4 LT |
315 | /* |
316 | * Write request completion callback. | |
317 | */ | |
e6d98bb8 | 318 | static void tty3270_write_callback(struct raw3270_request *rq, void *data) |
1da177e4 | 319 | { |
881e18f9 | 320 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 | 321 | |
1da177e4 | 322 | if (rq->rc != 0) { |
25985edc | 323 | /* Write wasn't successful. Refresh all. */ |
1da177e4 LT |
324 | tp->update_flags = TTY_UPDATE_ALL; |
325 | tty3270_set_timer(tp, 1); | |
326 | } | |
327 | raw3270_request_reset(rq); | |
328 | xchg(&tp->write, rq); | |
329 | } | |
330 | ||
9c138af9 | 331 | static int tty3270_required_length(struct tty3270 *tp, struct tty3270_line *line) |
2b62ba58 SS |
332 | { |
333 | unsigned char f_color, b_color, highlight; | |
2b62ba58 SS |
334 | struct tty3270_cell *cell; |
335 | int i, flen = 3; /* Prefix (TO_SBA). */ | |
336 | ||
2b62ba58 SS |
337 | flen += line->len; |
338 | highlight = TAX_RESET; | |
339 | f_color = TAC_RESET; | |
340 | b_color = TAC_RESET; | |
341 | ||
342 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
343 | if (cell->attributes.highlight != highlight) { | |
344 | flen += 3; /* TO_SA to switch highlight. */ | |
345 | highlight = cell->attributes.highlight; | |
346 | } | |
347 | if (cell->attributes.f_color != f_color) { | |
348 | flen += 3; /* TO_SA to switch color. */ | |
349 | f_color = cell->attributes.f_color; | |
350 | } | |
351 | if (cell->attributes.b_color != b_color) { | |
352 | flen += 3; /* TO_SA to switch color. */ | |
353 | b_color = cell->attributes.b_color; | |
354 | } | |
355 | if (cell->attributes.alternate_charset) | |
356 | flen += 1; /* TO_GE to switch to graphics extensions */ | |
357 | } | |
358 | if (highlight != TAX_RESET) | |
359 | flen += 3; /* TO_SA to reset hightlight. */ | |
360 | if (f_color != TAC_RESET) | |
361 | flen += 3; /* TO_SA to reset color. */ | |
362 | if (b_color != TAC_RESET) | |
363 | flen += 3; /* TO_SA to reset color. */ | |
364 | if (line->len < tp->view.cols) | |
365 | flen += 4; /* Postfix (TO_RA). */ | |
366 | ||
367 | return flen; | |
368 | } | |
369 | ||
370 | static char *tty3270_add_reset_attributes(struct tty3270 *tp, struct tty3270_line *line, | |
371 | char *cp, struct tty3270_attribute *attr) | |
372 | { | |
ae657244 SS |
373 | if (attr->highlight != TAX_RESET) |
374 | cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET); | |
375 | if (attr->f_color != TAC_RESET) | |
376 | cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAX_RESET); | |
377 | if (attr->b_color != TAC_RESET) | |
378 | cp = tty3270_add_sa(tp, cp, TAT_BGCOLOR, TAX_RESET); | |
379 | if (line->len < tp->view.cols) | |
380 | cp = tty3270_add_ra(tp, cp, 0, 0, 0); | |
2b62ba58 SS |
381 | return cp; |
382 | } | |
383 | ||
6e49017c SS |
384 | static char tty3270_graphics_translate(struct tty3270 *tp, char ch) |
385 | { | |
386 | switch (ch) { | |
387 | case 'q': /* - */ | |
388 | return 0xa2; | |
389 | case 'x': /* '|' */ | |
390 | return 0x85; | |
391 | case 'l': /* |- */ | |
392 | return 0xc5; | |
393 | case 't': /* |_ */ | |
394 | return 0xc6; | |
395 | case 'u': /* _| */ | |
396 | return 0xd6; | |
397 | case 'k': /* -| */ | |
398 | return 0xd5; | |
399 | case 'j': | |
400 | return 0xd4; | |
401 | case 'm': | |
402 | return 0xc4; | |
403 | case 'n': /* + */ | |
404 | return 0xd3; | |
405 | case 'v': | |
406 | return 0xc7; | |
407 | case 'w': | |
408 | return 0xd7; | |
409 | default: | |
410 | return ch; | |
411 | } | |
412 | } | |
413 | ||
414 | static char *tty3270_add_attributes(struct tty3270 *tp, struct tty3270_line *line, | |
415 | struct tty3270_attribute *attr, char *cp) | |
2b62ba58 SS |
416 | { |
417 | struct tty3270_cell *cell; | |
ae657244 | 418 | int c, i; |
2b62ba58 | 419 | |
ae657244 | 420 | cp = tty3270_add_ba(tp, cp, TO_SBA, 0, 0); |
2b62ba58 SS |
421 | |
422 | for (i = 0, cell = line->cells; i < line->len; i++, cell++) { | |
423 | if (cell->attributes.highlight != attr->highlight) { | |
2b62ba58 | 424 | attr->highlight = cell->attributes.highlight; |
ae657244 | 425 | cp = tty3270_add_sa(tp, cp, TAT_EXTHI, attr->highlight); |
2b62ba58 SS |
426 | } |
427 | if (cell->attributes.f_color != attr->f_color) { | |
2b62ba58 | 428 | attr->f_color = cell->attributes.f_color; |
ae657244 | 429 | cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, attr->f_color); |
2b62ba58 SS |
430 | } |
431 | if (cell->attributes.b_color != attr->b_color) { | |
2b62ba58 | 432 | attr->b_color = cell->attributes.b_color; |
ae657244 | 433 | cp = tty3270_add_sa(tp, cp, TAT_BGCOLOR, attr->b_color); |
2b62ba58 | 434 | } |
ae657244 SS |
435 | c = cell->character; |
436 | if (cell->attributes.alternate_charset) | |
437 | cp = tty3270_add_ge(tp, cp, tty3270_graphics_translate(tp, c)); | |
438 | else | |
439 | *cp++ = tp->view.ascebc[c]; | |
2b62ba58 SS |
440 | } |
441 | return cp; | |
442 | } | |
443 | ||
444 | static void tty3270_reset_attributes(struct tty3270_attribute *attr) | |
445 | { | |
446 | attr->highlight = TAX_RESET; | |
447 | attr->f_color = TAC_RESET; | |
448 | attr->b_color = TAC_RESET; | |
449 | } | |
450 | ||
2b62ba58 SS |
451 | /* |
452 | * Convert a tty3270_line to a 3270 data fragment usable for output. | |
453 | */ | |
9c138af9 | 454 | static unsigned int tty3270_convert_line(struct tty3270 *tp, struct tty3270_line *line) |
2b62ba58 | 455 | { |
2b62ba58 | 456 | struct tty3270_attribute attr; |
9c138af9 | 457 | int flen; |
2b62ba58 SS |
458 | char *cp; |
459 | ||
460 | /* Determine how long the fragment will be. */ | |
9c138af9 SS |
461 | flen = tty3270_required_length(tp, line); |
462 | if (flen > PAGE_SIZE) | |
463 | return 0; | |
2b62ba58 SS |
464 | /* Write 3270 data fragment. */ |
465 | tty3270_reset_attributes(&attr); | |
9c138af9 | 466 | cp = tty3270_add_attributes(tp, line, &attr, tp->converted_line); |
2b62ba58 | 467 | cp = tty3270_add_reset_attributes(tp, line, cp, &attr); |
9c138af9 | 468 | return cp - (char *)tp->converted_line; |
2b62ba58 SS |
469 | } |
470 | ||
1da177e4 LT |
471 | /* |
472 | * Update 3270 display. | |
473 | */ | |
e6d98bb8 | 474 | static void tty3270_update(struct timer_list *t) |
1da177e4 | 475 | { |
c9602ee7 | 476 | struct tty3270 *tp = from_timer(tp, t, timer); |
1da177e4 | 477 | struct raw3270_request *wrq; |
9c138af9 | 478 | struct tty3270_line *line; |
1da177e4 | 479 | unsigned long updated; |
9c138af9 | 480 | int i, rc, len; |
1da177e4 LT |
481 | |
482 | wrq = xchg(&tp->write, 0); | |
483 | if (!wrq) { | |
484 | tty3270_set_timer(tp, 1); | |
485 | return; | |
486 | } | |
487 | ||
c17fe081 | 488 | spin_lock_irq(&tp->view.lock); |
1da177e4 | 489 | updated = 0; |
205d7ab9 | 490 | if (tp->update_flags & TTY_UPDATE_ALL) { |
9c138af9 | 491 | tp->update_flags = TTY_UPDATE_ERASE | |
205d7ab9 MS |
492 | TTY_UPDATE_INPUT | TTY_UPDATE_STATUS; |
493 | } | |
1da177e4 LT |
494 | if (tp->update_flags & TTY_UPDATE_ERASE) { |
495 | /* Use erase write alternate to erase display. */ | |
496 | raw3270_request_set_cmd(wrq, TC_EWRITEA); | |
497 | updated |= TTY_UPDATE_ERASE; | |
498 | } else | |
499 | raw3270_request_set_cmd(wrq, TC_WRITE); | |
500 | ||
501 | raw3270_request_add_data(wrq, &tp->wcc, 1); | |
502 | tp->wcc = TW_NONE; | |
503 | ||
504 | /* | |
505 | * Update status line. | |
506 | */ | |
ec1b0a33 SS |
507 | if (tp->update_flags & TTY_UPDATE_STATUS) { |
508 | len = tty3270_add_status(tp); | |
509 | if (raw3270_request_add_data(wrq, tp->converted_line, len) == 0) | |
1da177e4 | 510 | updated |= TTY_UPDATE_STATUS; |
ec1b0a33 | 511 | } |
1da177e4 LT |
512 | |
513 | /* | |
514 | * Write input line. | |
515 | */ | |
516 | if (tp->update_flags & TTY_UPDATE_INPUT) | |
517 | if (raw3270_request_add_data(wrq, tp->prompt->string, | |
518 | tp->prompt->len) == 0) | |
519 | updated |= TTY_UPDATE_INPUT; | |
520 | ||
9c138af9 SS |
521 | for (i = 0; i < tty3270_tty_rows(tp); i++) { |
522 | line = tty3270_get_view_line(tp, i); | |
523 | if (!line->dirty) | |
524 | continue; | |
525 | len = tty3270_convert_line(tp, line); | |
526 | tty3270_update_string(tp, tp->converted_line, len, i); | |
527 | if (raw3270_request_add_data(wrq, tp->converted_line, len)) | |
528 | break; | |
529 | line->dirty = 0; | |
1da177e4 | 530 | } |
9c138af9 SS |
531 | |
532 | if (i < tty3270_tty_rows(tp) - 1) | |
533 | tty3270_set_timer(tp, 1); | |
534 | ||
1da177e4 LT |
535 | wrq->callback = tty3270_write_callback; |
536 | rc = raw3270_start(&tp->view, wrq); | |
537 | if (rc == 0) { | |
538 | tp->update_flags &= ~updated; | |
539 | if (tp->update_flags) | |
540 | tty3270_set_timer(tp, 1); | |
541 | } else { | |
542 | raw3270_request_reset(wrq); | |
543 | xchg(&tp->write, wrq); | |
544 | } | |
c17fe081 | 545 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
546 | } |
547 | ||
548 | /* | |
549 | * Command recalling. | |
550 | */ | |
e6d98bb8 | 551 | static void tty3270_rcl_add(struct tty3270 *tp, char *input, int len) |
1da177e4 LT |
552 | { |
553 | struct string *s; | |
554 | ||
d2c993d8 | 555 | tp->rcl_walk = NULL; |
1da177e4 LT |
556 | if (len <= 0) |
557 | return; | |
558 | if (tp->rcl_nr >= tp->rcl_max) { | |
559 | s = list_entry(tp->rcl_lines.next, struct string, list); | |
560 | list_del(&s->list); | |
561 | free_string(&tp->freemem, s); | |
562 | tp->rcl_nr--; | |
563 | } | |
564 | s = tty3270_alloc_string(tp, len); | |
9c138af9 SS |
565 | if (!s) |
566 | return; | |
1da177e4 LT |
567 | memcpy(s->string, input, len); |
568 | list_add_tail(&s->list, &tp->rcl_lines); | |
569 | tp->rcl_nr++; | |
570 | } | |
571 | ||
e6d98bb8 | 572 | static void tty3270_rcl_backward(struct kbd_data *kbd) |
1da177e4 | 573 | { |
ba186e7d | 574 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 LT |
575 | struct string *s; |
576 | ||
c17fe081 | 577 | spin_lock_irq(&tp->view.lock); |
1da177e4 LT |
578 | if (tp->inattr == TF_INPUT) { |
579 | if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) | |
580 | tp->rcl_walk = tp->rcl_walk->prev; | |
581 | else if (!list_empty(&tp->rcl_lines)) | |
582 | tp->rcl_walk = tp->rcl_lines.prev; | |
583 | s = tp->rcl_walk ? | |
d2c993d8 | 584 | list_entry(tp->rcl_walk, struct string, list) : NULL; |
1da177e4 LT |
585 | if (tp->rcl_walk) { |
586 | s = list_entry(tp->rcl_walk, struct string, list); | |
587 | tty3270_update_prompt(tp, s->string, s->len); | |
588 | } else | |
d2c993d8 | 589 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
590 | tty3270_set_timer(tp, 1); |
591 | } | |
c17fe081 | 592 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
593 | } |
594 | ||
595 | /* | |
596 | * Deactivate tty view. | |
597 | */ | |
e6d98bb8 | 598 | static void tty3270_exit_tty(struct kbd_data *kbd) |
1da177e4 | 599 | { |
ba186e7d | 600 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 601 | |
1da177e4 LT |
602 | raw3270_deactivate_view(&tp->view); |
603 | } | |
604 | ||
9c138af9 SS |
605 | static void tty3270_redraw(struct tty3270 *tp) |
606 | { | |
607 | int i; | |
608 | ||
609 | for (i = 0; i < tty3270_tty_rows(tp); i++) | |
610 | tty3270_get_view_line(tp, i)->dirty = 1; | |
611 | tp->update_flags = TTY_UPDATE_ALL; | |
612 | tty3270_set_timer(tp, 1); | |
613 | } | |
1da177e4 LT |
614 | /* |
615 | * Scroll forward in history. | |
616 | */ | |
e6d98bb8 | 617 | static void tty3270_scroll_forward(struct kbd_data *kbd) |
1da177e4 | 618 | { |
ba186e7d | 619 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 620 | |
c17fe081 | 621 | spin_lock_irq(&tp->view.lock); |
9c138af9 SS |
622 | |
623 | if (tp->nr_up >= tty3270_tty_rows(tp)) | |
624 | tp->nr_up -= tty3270_tty_rows(tp) / 2; | |
625 | else | |
626 | tp->nr_up = 0; | |
627 | tty3270_redraw(tp); | |
c17fe081 | 628 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
629 | } |
630 | ||
631 | /* | |
632 | * Scroll backward in history. | |
633 | */ | |
e6d98bb8 | 634 | static void tty3270_scroll_backward(struct kbd_data *kbd) |
1da177e4 | 635 | { |
ba186e7d | 636 | struct tty3270 *tp = container_of(kbd->port, struct tty3270, port); |
1da177e4 | 637 | |
c17fe081 | 638 | spin_lock_irq(&tp->view.lock); |
9c138af9 SS |
639 | tp->nr_up += tty3270_tty_rows(tp) / 2; |
640 | if (tp->nr_up > tp->allocated_lines - tty3270_tty_rows(tp)) | |
641 | tp->nr_up = tp->allocated_lines - tty3270_tty_rows(tp); | |
642 | tty3270_redraw(tp); | |
c17fe081 | 643 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
644 | } |
645 | ||
646 | /* | |
647 | * Pass input line to tty. | |
648 | */ | |
e6d98bb8 | 649 | static void tty3270_read_tasklet(unsigned long data) |
1da177e4 | 650 | { |
5cdfbdce | 651 | struct raw3270_request *rrq = (struct raw3270_request *)data; |
1da177e4 | 652 | static char kreset_data = TW_KR; |
881e18f9 | 653 | struct tty3270 *tp = container_of(rrq->view, struct tty3270, view); |
1da177e4 LT |
654 | char *input; |
655 | int len; | |
656 | ||
c17fe081 | 657 | spin_lock_irq(&tp->view.lock); |
1da177e4 LT |
658 | /* |
659 | * Two AID keys are special: For 0x7d (enter) the input line | |
660 | * has to be emitted to the tty and for 0x6d the screen | |
661 | * needs to be redrawn. | |
662 | */ | |
d2c993d8 | 663 | input = NULL; |
1da177e4 | 664 | len = 0; |
e22de7d7 SS |
665 | switch (tp->input->string[0]) { |
666 | case AID_ENTER: | |
1da177e4 LT |
667 | /* Enter: write input to tty. */ |
668 | input = tp->input->string + 6; | |
669 | len = tp->input->len - 6 - rrq->rescnt; | |
670 | if (tp->inattr != TF_INPUTN) | |
671 | tty3270_rcl_add(tp, input, len); | |
9c138af9 | 672 | if (tp->nr_up > 0) |
1da177e4 | 673 | tp->nr_up = 0; |
1da177e4 | 674 | /* Clear input area. */ |
d2c993d8 | 675 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 | 676 | tty3270_set_timer(tp, 1); |
e22de7d7 SS |
677 | break; |
678 | case AID_CLEAR: | |
1da177e4 | 679 | /* Display has been cleared. Redraw. */ |
1da177e4 LT |
680 | tp->update_flags = TTY_UPDATE_ALL; |
681 | tty3270_set_timer(tp, 1); | |
cbb36313 SS |
682 | if (!list_empty(&tp->readpartreq->list)) |
683 | break; | |
684 | raw3270_start_request(&tp->view, tp->readpartreq, TC_WRITESF, | |
685 | (char *)sfq_read_partition, sizeof(sfq_read_partition)); | |
686 | break; | |
687 | case AID_READ_PARTITION: | |
688 | raw3270_read_modified_cb(tp->readpartreq, tp->input->string); | |
689 | break; | |
e22de7d7 SS |
690 | default: |
691 | break; | |
1da177e4 | 692 | } |
c17fe081 | 693 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
694 | |
695 | /* Start keyboard reset command. */ | |
f08e3155 | 696 | raw3270_start_request(&tp->view, tp->kreset, TC_WRITE, &kreset_data, 1); |
1da177e4 | 697 | |
ba186e7d JS |
698 | while (len-- > 0) |
699 | kbd_keycode(tp->kbd, *input++); | |
700 | /* Emit keycode for AID byte. */ | |
701 | kbd_keycode(tp->kbd, 256 + tp->input->string[0]); | |
1da177e4 LT |
702 | |
703 | raw3270_request_reset(rrq); | |
704 | xchg(&tp->read, rrq); | |
705 | raw3270_put_view(&tp->view); | |
706 | } | |
707 | ||
708 | /* | |
709 | * Read request completion callback. | |
710 | */ | |
e6d98bb8 | 711 | static void tty3270_read_callback(struct raw3270_request *rq, void *data) |
1da177e4 | 712 | { |
881e18f9 | 713 | struct tty3270 *tp = container_of(rq->view, struct tty3270, view); |
1da177e4 LT |
714 | raw3270_get_view(rq->view); |
715 | /* Schedule tasklet to pass input to tty. */ | |
881e18f9 | 716 | tasklet_schedule(&tp->readlet); |
1da177e4 LT |
717 | } |
718 | ||
719 | /* | |
720 | * Issue a read request. Call with device lock. | |
721 | */ | |
e6d98bb8 | 722 | static void tty3270_issue_read(struct tty3270 *tp, int lock) |
1da177e4 LT |
723 | { |
724 | struct raw3270_request *rrq; | |
725 | int rc; | |
726 | ||
727 | rrq = xchg(&tp->read, 0); | |
728 | if (!rrq) | |
729 | /* Read already scheduled. */ | |
730 | return; | |
731 | rrq->callback = tty3270_read_callback; | |
732 | rrq->callback_data = tp; | |
733 | raw3270_request_set_cmd(rrq, TC_READMOD); | |
734 | raw3270_request_set_data(rrq, tp->input->string, tp->input->len); | |
735 | /* Issue the read modified request. */ | |
736 | if (lock) { | |
737 | rc = raw3270_start(&tp->view, rrq); | |
738 | } else | |
739 | rc = raw3270_start_irq(&tp->view, rrq); | |
740 | if (rc) { | |
741 | raw3270_request_reset(rrq); | |
742 | xchg(&tp->read, rrq); | |
743 | } | |
744 | } | |
745 | ||
0c756914 MS |
746 | /* |
747 | * Hang up the tty | |
748 | */ | |
e6d98bb8 | 749 | static void tty3270_hangup_tasklet(unsigned long data) |
0c756914 | 750 | { |
5cdfbdce | 751 | struct tty3270 *tp = (struct tty3270 *)data; |
0c756914 MS |
752 | tty_port_tty_hangup(&tp->port, true); |
753 | raw3270_put_view(&tp->view); | |
754 | } | |
755 | ||
1da177e4 LT |
756 | /* |
757 | * Switch to the tty view. | |
758 | */ | |
e6d98bb8 | 759 | static int tty3270_activate(struct raw3270_view *view) |
1da177e4 | 760 | { |
881e18f9 | 761 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
1da177e4 | 762 | |
1da177e4 LT |
763 | tp->update_flags = TTY_UPDATE_ALL; |
764 | tty3270_set_timer(tp, 1); | |
1da177e4 LT |
765 | return 0; |
766 | } | |
767 | ||
e6d98bb8 | 768 | static void tty3270_deactivate(struct raw3270_view *view) |
1da177e4 | 769 | { |
881e18f9 | 770 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
205d7ab9 | 771 | |
205d7ab9 | 772 | del_timer(&tp->timer); |
1da177e4 LT |
773 | } |
774 | ||
e6d98bb8 | 775 | static void tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) |
1da177e4 LT |
776 | { |
777 | /* Handle ATTN. Schedule tasklet to read aid. */ | |
23d805b6 | 778 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
1da177e4 LT |
779 | if (!tp->throttle) |
780 | tty3270_issue_read(tp, 0); | |
781 | else | |
782 | tp->attn = 1; | |
783 | } | |
784 | ||
785 | if (rq) { | |
0c756914 | 786 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { |
1da177e4 | 787 | rq->rc = -EIO; |
0c756914 MS |
788 | raw3270_get_view(&tp->view); |
789 | tasklet_schedule(&tp->hanglet); | |
790 | } else { | |
1da177e4 | 791 | /* Normal end. Copy residual count. */ |
23d805b6 | 792 | rq->rescnt = irb->scsw.cmd.count; |
0c756914 | 793 | } |
05bfd70b MS |
794 | } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
795 | /* Interrupt without an outstanding request -> update all */ | |
796 | tp->update_flags = TTY_UPDATE_ALL; | |
797 | tty3270_set_timer(tp, 1); | |
1da177e4 | 798 | } |
1da177e4 LT |
799 | } |
800 | ||
801 | /* | |
802 | * Allocate tty3270 structure. | |
803 | */ | |
e6d98bb8 | 804 | static struct tty3270 *tty3270_alloc_view(void) |
1da177e4 LT |
805 | { |
806 | struct tty3270 *tp; | |
807 | int pages; | |
808 | ||
88abaab4 | 809 | tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
1da177e4 LT |
810 | if (!tp) |
811 | goto out_err; | |
1da177e4 | 812 | tp->freemem_pages = |
6da2ec56 KC |
813 | kmalloc_array(TTY3270_STRING_PAGES, sizeof(void *), |
814 | GFP_KERNEL); | |
1da177e4 LT |
815 | if (!tp->freemem_pages) |
816 | goto out_tp; | |
817 | INIT_LIST_HEAD(&tp->freemem); | |
9d2ae233 | 818 | INIT_LIST_HEAD(&tp->lines); |
9d2ae233 JS |
819 | INIT_LIST_HEAD(&tp->rcl_lines); |
820 | tp->rcl_max = 20; | |
9d2ae233 | 821 | |
1da177e4 LT |
822 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { |
823 | tp->freemem_pages[pages] = (void *) | |
824 | __get_free_pages(GFP_KERNEL|GFP_DMA, 0); | |
825 | if (!tp->freemem_pages[pages]) | |
826 | goto out_pages; | |
827 | add_string_memory(&tp->freemem, | |
828 | tp->freemem_pages[pages], PAGE_SIZE); | |
829 | } | |
830 | tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); | |
ed3cb6f0 | 831 | if (IS_ERR(tp->write)) |
1da177e4 LT |
832 | goto out_pages; |
833 | tp->read = raw3270_request_alloc(0); | |
ed3cb6f0 | 834 | if (IS_ERR(tp->read)) |
1da177e4 LT |
835 | goto out_write; |
836 | tp->kreset = raw3270_request_alloc(1); | |
ed3cb6f0 | 837 | if (IS_ERR(tp->kreset)) |
1da177e4 | 838 | goto out_read; |
cbb36313 SS |
839 | tp->readpartreq = raw3270_request_alloc(sizeof(sfq_read_partition)); |
840 | if (IS_ERR(tp->readpartreq)) | |
841 | goto out_reset; | |
1da177e4 LT |
842 | tp->kbd = kbd_alloc(); |
843 | if (!tp->kbd) | |
cbb36313 | 844 | goto out_readpartreq; |
57985d7e MS |
845 | |
846 | tty_port_init(&tp->port); | |
c9602ee7 | 847 | timer_setup(&tp->timer, tty3270_update, 0); |
5cdfbdce | 848 | tasklet_init(&tp->readlet, tty3270_read_tasklet, |
57985d7e | 849 | (unsigned long) tp->read); |
5cdfbdce | 850 | tasklet_init(&tp->hanglet, tty3270_hangup_tasklet, |
0c756914 | 851 | (unsigned long) tp); |
1da177e4 LT |
852 | return tp; |
853 | ||
cbb36313 SS |
854 | out_readpartreq: |
855 | raw3270_request_free(tp->readpartreq); | |
1da177e4 LT |
856 | out_reset: |
857 | raw3270_request_free(tp->kreset); | |
858 | out_read: | |
859 | raw3270_request_free(tp->read); | |
860 | out_write: | |
861 | raw3270_request_free(tp->write); | |
862 | out_pages: | |
863 | while (pages--) | |
864 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
865 | kfree(tp->freemem_pages); | |
191c5f10 | 866 | tty_port_destroy(&tp->port); |
1da177e4 LT |
867 | out_tp: |
868 | kfree(tp); | |
869 | out_err: | |
870 | return ERR_PTR(-ENOMEM); | |
871 | } | |
872 | ||
873 | /* | |
874 | * Free tty3270 structure. | |
875 | */ | |
e6d98bb8 | 876 | static void tty3270_free_view(struct tty3270 *tp) |
1da177e4 LT |
877 | { |
878 | int pages; | |
879 | ||
880 | kbd_free(tp->kbd); | |
881 | raw3270_request_free(tp->kreset); | |
882 | raw3270_request_free(tp->read); | |
883 | raw3270_request_free(tp->write); | |
884 | for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) | |
885 | free_pages((unsigned long) tp->freemem_pages[pages], 0); | |
886 | kfree(tp->freemem_pages); | |
9c138af9 | 887 | free_page((unsigned long)tp->converted_line); |
191c5f10 | 888 | tty_port_destroy(&tp->port); |
1da177e4 LT |
889 | kfree(tp); |
890 | } | |
891 | ||
892 | /* | |
893 | * Allocate tty3270 screen. | |
894 | */ | |
b2057c87 SS |
895 | static struct tty3270_line *tty3270_alloc_screen(struct tty3270 *tp, unsigned int rows, |
896 | unsigned int cols, int *allocated_out) | |
1da177e4 | 897 | { |
4d334fd1 | 898 | struct tty3270_line *screen; |
b2057c87 | 899 | int allocated, lines; |
1da177e4 | 900 | |
b2057c87 SS |
901 | allocated = __roundup_pow_of_two(rows) * TTY3270_SCREEN_PAGES; |
902 | screen = kcalloc(allocated, sizeof(struct tty3270_line), GFP_KERNEL); | |
4d334fd1 | 903 | if (!screen) |
1da177e4 | 904 | goto out_err; |
b2057c87 SS |
905 | for (lines = 0; lines < allocated; lines++) { |
906 | screen[lines].cells = kcalloc(cols, sizeof(struct tty3270_cell), GFP_KERNEL); | |
4d334fd1 | 907 | if (!screen[lines].cells) |
1da177e4 | 908 | goto out_screen; |
1da177e4 | 909 | } |
b2057c87 | 910 | *allocated_out = allocated; |
4d334fd1 | 911 | return screen; |
1da177e4 LT |
912 | out_screen: |
913 | while (lines--) | |
4d334fd1 MS |
914 | kfree(screen[lines].cells); |
915 | kfree(screen); | |
1da177e4 | 916 | out_err: |
4d334fd1 | 917 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
918 | } |
919 | ||
920 | /* | |
921 | * Free tty3270 screen. | |
922 | */ | |
b2057c87 | 923 | static void tty3270_free_screen(struct tty3270_line *screen, int old_lines) |
1da177e4 LT |
924 | { |
925 | int lines; | |
926 | ||
b2057c87 | 927 | for (lines = 0; lines < old_lines; lines++) |
4d334fd1 MS |
928 | kfree(screen[lines].cells); |
929 | kfree(screen); | |
930 | } | |
931 | ||
932 | /* | |
933 | * Resize tty3270 screen | |
934 | */ | |
91621ba7 SS |
935 | static void tty3270_resize(struct raw3270_view *view, |
936 | int new_model, int new_rows, int new_cols, | |
937 | int old_model, int old_rows, int old_cols) | |
4d334fd1 | 938 | { |
91621ba7 | 939 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
4d334fd1 MS |
940 | struct tty3270_line *screen, *oscreen; |
941 | struct tty_struct *tty; | |
4d334fd1 | 942 | struct winsize ws; |
b2057c87 | 943 | int new_allocated, old_allocated = tp->allocated_lines; |
4d334fd1 | 944 | |
91621ba7 SS |
945 | if (old_model == new_model && |
946 | old_cols == new_cols && | |
947 | old_rows == new_rows) { | |
948 | spin_lock_irq(&tp->view.lock); | |
9c138af9 | 949 | tty3270_redraw(tp); |
91621ba7 SS |
950 | spin_unlock_irq(&tp->view.lock); |
951 | return; | |
952 | } | |
b2057c87 | 953 | screen = tty3270_alloc_screen(tp, new_rows, new_cols, &new_allocated); |
8f0ba630 | 954 | if (IS_ERR(screen)) |
4d334fd1 MS |
955 | return; |
956 | /* Switch to new output size */ | |
c17fe081 | 957 | spin_lock_irq(&tp->view.lock); |
7e36eff1 | 958 | tty3270_blank_screen(tp); |
4d334fd1 | 959 | oscreen = tp->screen; |
4d334fd1 | 960 | tp->screen = screen; |
b2057c87 | 961 | tp->allocated_lines = new_allocated; |
91621ba7 SS |
962 | tp->view.rows = new_rows; |
963 | tp->view.cols = new_cols; | |
964 | tp->view.model = new_model; | |
965 | ||
4d334fd1 | 966 | free_string(&tp->freemem, tp->prompt); |
4d334fd1 | 967 | tty3270_create_prompt(tp); |
4d334fd1 | 968 | tp->update_flags = TTY_UPDATE_ALL; |
c17fe081 | 969 | spin_unlock_irq(&tp->view.lock); |
b2057c87 | 970 | tty3270_free_screen(oscreen, old_allocated); |
4d334fd1 MS |
971 | tty3270_set_timer(tp, 1); |
972 | /* Informat tty layer about new size */ | |
973 | tty = tty_port_tty_get(&tp->port); | |
974 | if (!tty) | |
975 | return; | |
9eb99b94 | 976 | ws.ws_row = tty3270_tty_rows(tp); |
4d334fd1 MS |
977 | ws.ws_col = tp->view.cols; |
978 | tty_do_resize(tty, &ws); | |
5ff04fe5 | 979 | tty_kref_put(tty); |
4d334fd1 MS |
980 | } |
981 | ||
1da177e4 LT |
982 | /* |
983 | * Unlink tty3270 data structure from tty. | |
984 | */ | |
e6d98bb8 | 985 | static void tty3270_release(struct raw3270_view *view) |
1da177e4 | 986 | { |
881e18f9 | 987 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
ba186e7d | 988 | struct tty_struct *tty = tty_port_tty_get(&tp->port); |
1da177e4 | 989 | |
1da177e4 | 990 | if (tty) { |
d2c993d8 | 991 | tty->driver_data = NULL; |
ba186e7d | 992 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
993 | tty_hangup(tty); |
994 | raw3270_put_view(&tp->view); | |
ba186e7d | 995 | tty_kref_put(tty); |
1da177e4 LT |
996 | } |
997 | } | |
998 | ||
999 | /* | |
1000 | * Free tty3270 data structure | |
1001 | */ | |
e6d98bb8 | 1002 | static void tty3270_free(struct raw3270_view *view) |
1da177e4 | 1003 | { |
881e18f9 | 1004 | struct tty3270 *tp = container_of(view, struct tty3270, view); |
4d334fd1 | 1005 | |
03439e7d | 1006 | del_timer_sync(&tp->timer); |
b2057c87 | 1007 | tty3270_free_screen(tp->screen, tp->allocated_lines); |
ec1b0a33 | 1008 | free_page((unsigned long)tp->converted_line); |
881e18f9 | 1009 | tty3270_free_view(tp); |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | /* | |
1013 | * Delayed freeing of tty3270 views. | |
1014 | */ | |
e6d98bb8 | 1015 | static void tty3270_del_views(void) |
1da177e4 | 1016 | { |
1da177e4 LT |
1017 | int i; |
1018 | ||
c95571e6 MS |
1019 | for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) { |
1020 | struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i); | |
881e18f9 JS |
1021 | if (!IS_ERR(view)) |
1022 | raw3270_del_view(view); | |
1da177e4 LT |
1023 | } |
1024 | } | |
1025 | ||
2b67fc46 | 1026 | static struct raw3270_fn tty3270_fn = { |
1da177e4 LT |
1027 | .activate = tty3270_activate, |
1028 | .deactivate = tty3270_deactivate, | |
1029 | .intv = (void *) tty3270_irq, | |
1030 | .release = tty3270_release, | |
4d334fd1 MS |
1031 | .free = tty3270_free, |
1032 | .resize = tty3270_resize | |
1da177e4 LT |
1033 | }; |
1034 | ||
a21e962e SS |
1035 | static int |
1036 | tty3270_create_view(int index, struct tty3270 **newtp) | |
1da177e4 LT |
1037 | { |
1038 | struct tty3270 *tp; | |
9c138af9 | 1039 | int rc; |
1da177e4 | 1040 | |
a21e962e SS |
1041 | if (tty3270_max_index < index + 1) |
1042 | tty3270_max_index = index + 1; | |
1da177e4 LT |
1043 | |
1044 | /* Allocate tty3270 structure on first open. */ | |
1045 | tp = tty3270_alloc_view(); | |
1046 | if (IS_ERR(tp)) | |
1047 | return PTR_ERR(tp); | |
1048 | ||
1fcbba3d | 1049 | rc = raw3270_add_view(&tp->view, &tty3270_fn, |
a21e962e | 1050 | index + RAW3270_FIRSTMINOR, |
c17fe081 | 1051 | RAW3270_VIEW_LOCK_IRQ); |
ec1b0a33 SS |
1052 | if (rc) |
1053 | goto out_free_view; | |
1da177e4 | 1054 | |
b2057c87 SS |
1055 | tp->screen = tty3270_alloc_screen(tp, tp->view.rows, tp->view.cols, |
1056 | &tp->allocated_lines); | |
4d334fd1 MS |
1057 | if (IS_ERR(tp->screen)) { |
1058 | rc = PTR_ERR(tp->screen); | |
ec1b0a33 SS |
1059 | goto out_put_view; |
1060 | } | |
1061 | ||
1062 | tp->converted_line = (void *)__get_free_page(GFP_KERNEL); | |
1063 | if (!tp->converted_line) { | |
1064 | rc = -ENOMEM; | |
1065 | goto out_free_screen; | |
1da177e4 LT |
1066 | } |
1067 | ||
1da177e4 | 1068 | tty3270_create_prompt(tp); |
1da177e4 LT |
1069 | |
1070 | /* Create blank line for every line in the tty output area. */ | |
9c138af9 | 1071 | tty3270_blank_screen(tp); |
1da177e4 | 1072 | |
ba186e7d | 1073 | tp->kbd->port = &tp->port; |
1da177e4 LT |
1074 | tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; |
1075 | tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; | |
1076 | tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; | |
1077 | tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; | |
1078 | kbd_ascebc(tp->kbd, tp->view.ascebc); | |
1079 | ||
1080 | raw3270_activate_view(&tp->view); | |
a21e962e SS |
1081 | raw3270_put_view(&tp->view); |
1082 | *newtp = tp; | |
1083 | return 0; | |
ec1b0a33 SS |
1084 | |
1085 | out_free_screen: | |
1086 | tty3270_free_screen(tp->screen, tp->view.rows); | |
1087 | out_put_view: | |
1088 | raw3270_put_view(&tp->view); | |
1089 | raw3270_del_view(&tp->view); | |
1090 | out_free_view: | |
1091 | tty3270_free_view(tp); | |
1092 | return rc; | |
a21e962e SS |
1093 | } |
1094 | ||
1095 | /* | |
1096 | * This routine is called whenever a 3270 tty is opened first time. | |
1097 | */ | |
1098 | static int | |
1099 | tty3270_install(struct tty_driver *driver, struct tty_struct *tty) | |
1100 | { | |
1101 | struct raw3270_view *view; | |
1102 | struct tty3270 *tp; | |
1103 | int rc; | |
20cda6f2 | 1104 | |
a21e962e SS |
1105 | /* Check if the tty3270 is already there. */ |
1106 | view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR); | |
1107 | if (IS_ERR(view)) { | |
1108 | rc = tty3270_create_view(tty->index, &tp); | |
1109 | if (rc) | |
1110 | return rc; | |
1111 | } else { | |
1112 | tp = container_of(view, struct tty3270, view); | |
1113 | tty->driver_data = tp; | |
1114 | tp->inattr = TF_INPUT; | |
1115 | } | |
1116 | ||
9eb99b94 | 1117 | tty->winsize.ws_row = tty3270_tty_rows(tp); |
a21e962e | 1118 | tty->winsize.ws_col = tp->view.cols; |
20cda6f2 JS |
1119 | rc = tty_port_install(&tp->port, driver, tty); |
1120 | if (rc) { | |
1121 | raw3270_put_view(&tp->view); | |
1122 | return rc; | |
1123 | } | |
20cda6f2 | 1124 | tty->driver_data = tp; |
1da177e4 LT |
1125 | return 0; |
1126 | } | |
1127 | ||
736c9fd2 MS |
1128 | /* |
1129 | * This routine is called whenever a 3270 tty is opened. | |
1130 | */ | |
e6d98bb8 | 1131 | static int tty3270_open(struct tty_struct *tty, struct file *filp) |
736c9fd2 MS |
1132 | { |
1133 | struct tty3270 *tp = tty->driver_data; | |
1134 | struct tty_port *port = &tp->port; | |
1135 | ||
1136 | port->count++; | |
1137 | tty_port_tty_set(port, tty); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1da177e4 LT |
1141 | /* |
1142 | * This routine is called when the 3270 tty is closed. We wait | |
1143 | * for the remaining request to be completed. Then we clean up. | |
1144 | */ | |
e6d98bb8 | 1145 | static void tty3270_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1146 | { |
881e18f9 | 1147 | struct tty3270 *tp = tty->driver_data; |
1da177e4 LT |
1148 | |
1149 | if (tty->count > 1) | |
1150 | return; | |
b512353c | 1151 | if (tp) |
ba186e7d | 1152 | tty_port_tty_set(&tp->port, NULL); |
1da177e4 LT |
1153 | } |
1154 | ||
20cda6f2 JS |
1155 | static void tty3270_cleanup(struct tty_struct *tty) |
1156 | { | |
1157 | struct tty3270 *tp = tty->driver_data; | |
1158 | ||
b512353c MS |
1159 | if (tp) { |
1160 | tty->driver_data = NULL; | |
20cda6f2 | 1161 | raw3270_put_view(&tp->view); |
b512353c | 1162 | } |
20cda6f2 JS |
1163 | } |
1164 | ||
1da177e4 LT |
1165 | /* |
1166 | * We always have room. | |
1167 | */ | |
e6d98bb8 | 1168 | static unsigned int tty3270_write_room(struct tty_struct *tty) |
1da177e4 LT |
1169 | { |
1170 | return INT_MAX; | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Insert character into the screen at the current position with the | |
1175 | * current color and highlight. This function does NOT do cursor movement. | |
1176 | */ | |
74c76c84 | 1177 | static void tty3270_put_character(struct tty3270 *tp, char ch) |
1da177e4 LT |
1178 | { |
1179 | struct tty3270_line *line; | |
1180 | struct tty3270_cell *cell; | |
1181 | ||
9c138af9 | 1182 | line = tty3270_get_write_line(tp, tp->cy); |
1da177e4 LT |
1183 | if (line->len <= tp->cx) { |
1184 | while (line->len < tp->cx) { | |
1185 | cell = line->cells + line->len; | |
6e49017c | 1186 | cell->character = ' '; |
c2e9375e | 1187 | cell->attributes = tp->attributes; |
1da177e4 LT |
1188 | line->len++; |
1189 | } | |
1190 | line->len++; | |
1191 | } | |
1192 | cell = line->cells + tp->cx; | |
6e49017c | 1193 | cell->character = ch; |
c2e9375e | 1194 | cell->attributes = tp->attributes; |
9c138af9 | 1195 | line->dirty = 1; |
1da177e4 LT |
1196 | } |
1197 | ||
1da177e4 LT |
1198 | /* |
1199 | * Do carriage return. | |
1200 | */ | |
e6d98bb8 | 1201 | static void tty3270_cr(struct tty3270 *tp) |
1da177e4 LT |
1202 | { |
1203 | tp->cx = 0; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Do line feed. | |
1208 | */ | |
e6d98bb8 | 1209 | static void tty3270_lf(struct tty3270 *tp) |
1da177e4 | 1210 | { |
9c138af9 | 1211 | struct tty3270_line *line; |
1da177e4 LT |
1212 | int i; |
1213 | ||
9eb99b94 | 1214 | if (tp->cy < tty3270_tty_rows(tp) - 1) { |
1da177e4 | 1215 | tp->cy++; |
9c138af9 SS |
1216 | } else { |
1217 | tp->line_view_start = tty3270_line_increment(tp, tp->line_view_start, 1); | |
1218 | tp->line_write_start = tty3270_line_increment(tp, tp->line_write_start, 1); | |
1219 | for (i = 0; i < tty3270_tty_rows(tp); i++) | |
1220 | tty3270_get_view_line(tp, i)->dirty = 1; | |
1da177e4 | 1221 | } |
9c138af9 SS |
1222 | |
1223 | line = tty3270_get_write_line(tp, tp->cy); | |
1224 | line->len = 0; | |
1225 | line->dirty = 1; | |
1da177e4 LT |
1226 | } |
1227 | ||
e6d98bb8 | 1228 | static void tty3270_ri(struct tty3270 *tp) |
1da177e4 | 1229 | { |
9c138af9 SS |
1230 | if (tp->cy > 0) |
1231 | tp->cy--; | |
1da177e4 LT |
1232 | } |
1233 | ||
c2e9375e SS |
1234 | static void tty3270_reset_cell(struct tty3270 *tp, struct tty3270_cell *cell) |
1235 | { | |
6e49017c | 1236 | cell->character = ' '; |
c2e9375e SS |
1237 | tty3270_reset_attributes(&cell->attributes); |
1238 | } | |
1239 | ||
1da177e4 LT |
1240 | /* |
1241 | * Insert characters at current position. | |
1242 | */ | |
e6d98bb8 | 1243 | static void tty3270_insert_characters(struct tty3270 *tp, int n) |
1da177e4 LT |
1244 | { |
1245 | struct tty3270_line *line; | |
1246 | int k; | |
1247 | ||
9c138af9 | 1248 | line = tty3270_get_write_line(tp, tp->cy); |
c2e9375e SS |
1249 | while (line->len < tp->cx) |
1250 | tty3270_reset_cell(tp, &line->cells[line->len++]); | |
1da177e4 LT |
1251 | if (n > tp->view.cols - tp->cx) |
1252 | n = tp->view.cols - tp->cx; | |
1253 | k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); | |
1254 | while (k--) | |
1255 | line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; | |
1256 | line->len += n; | |
1257 | if (line->len > tp->view.cols) | |
1258 | line->len = tp->view.cols; | |
1259 | while (n-- > 0) { | |
6e49017c | 1260 | line->cells[tp->cx + n].character = ' '; |
c2e9375e | 1261 | line->cells[tp->cx + n].attributes = tp->attributes; |
1da177e4 LT |
1262 | } |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Delete characters at current position. | |
1267 | */ | |
e6d98bb8 | 1268 | static void tty3270_delete_characters(struct tty3270 *tp, int n) |
1da177e4 LT |
1269 | { |
1270 | struct tty3270_line *line; | |
1271 | int i; | |
1272 | ||
9c138af9 | 1273 | line = tty3270_get_write_line(tp, tp->cy); |
1da177e4 LT |
1274 | if (line->len <= tp->cx) |
1275 | return; | |
1276 | if (line->len - tp->cx <= n) { | |
1277 | line->len = tp->cx; | |
1278 | return; | |
1279 | } | |
1280 | for (i = tp->cx; i + n < line->len; i++) | |
1281 | line->cells[i] = line->cells[i + n]; | |
1282 | line->len -= n; | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Erase characters at current position. | |
1287 | */ | |
e6d98bb8 | 1288 | static void tty3270_erase_characters(struct tty3270 *tp, int n) |
1da177e4 LT |
1289 | { |
1290 | struct tty3270_line *line; | |
1291 | struct tty3270_cell *cell; | |
1292 | ||
9c138af9 | 1293 | line = tty3270_get_write_line(tp, tp->cy); |
1da177e4 LT |
1294 | while (line->len > tp->cx && n-- > 0) { |
1295 | cell = line->cells + tp->cx++; | |
c2e9375e | 1296 | tty3270_reset_cell(tp, cell); |
1da177e4 LT |
1297 | } |
1298 | tp->cx += n; | |
1299 | tp->cx = min_t(int, tp->cx, tp->view.cols - 1); | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * Erase line, 3 different cases: | |
1304 | * Esc [ 0 K Erase from current position to end of line inclusive | |
1305 | * Esc [ 1 K Erase from beginning of line to current position inclusive | |
1306 | * Esc [ 2 K Erase entire line (without moving cursor) | |
1307 | */ | |
e6d98bb8 | 1308 | static void tty3270_erase_line(struct tty3270 *tp, int mode) |
1da177e4 LT |
1309 | { |
1310 | struct tty3270_line *line; | |
1311 | struct tty3270_cell *cell; | |
4043ea22 | 1312 | int i, start, end; |
1da177e4 | 1313 | |
9c138af9 | 1314 | line = tty3270_get_write_line(tp, tp->cy); |
4043ea22 | 1315 | |
815f3eee SS |
1316 | switch (mode) { |
1317 | case 0: | |
4043ea22 SS |
1318 | start = tp->cx; |
1319 | end = tp->view.cols; | |
815f3eee SS |
1320 | break; |
1321 | case 1: | |
4043ea22 SS |
1322 | start = 0; |
1323 | end = tp->cx; | |
815f3eee SS |
1324 | break; |
1325 | case 2: | |
4043ea22 SS |
1326 | start = 0; |
1327 | end = tp->view.cols; | |
815f3eee SS |
1328 | break; |
1329 | default: | |
1330 | return; | |
1331 | } | |
4043ea22 SS |
1332 | |
1333 | for (i = start; i < end; i++) { | |
1334 | cell = line->cells + i; | |
1335 | tty3270_reset_cell(tp, cell); | |
1336 | cell->attributes.b_color = tp->attributes.b_color; | |
1337 | } | |
1338 | ||
1339 | if (line->len <= end) | |
1340 | line->len = end; | |
1da177e4 LT |
1341 | } |
1342 | ||
1343 | /* | |
1344 | * Erase display, 3 different cases: | |
1345 | * Esc [ 0 J Erase from current position to bottom of screen inclusive | |
1346 | * Esc [ 1 J Erase from top of screen to current position inclusive | |
1347 | * Esc [ 2 J Erase entire screen (without moving the cursor) | |
1348 | */ | |
e6d98bb8 | 1349 | static void tty3270_erase_display(struct tty3270 *tp, int mode) |
1da177e4 | 1350 | { |
9c138af9 | 1351 | struct tty3270_line *line; |
65b77ccb | 1352 | int i, start, end; |
1da177e4 | 1353 | |
65b77ccb SS |
1354 | switch (mode) { |
1355 | case 0: | |
1da177e4 | 1356 | tty3270_erase_line(tp, 0); |
65b77ccb | 1357 | start = tp->cy + 1; |
9eb99b94 | 1358 | end = tty3270_tty_rows(tp); |
65b77ccb SS |
1359 | break; |
1360 | case 1: | |
1361 | start = 0; | |
1362 | end = tp->cy; | |
1da177e4 | 1363 | tty3270_erase_line(tp, 1); |
65b77ccb SS |
1364 | break; |
1365 | case 2: | |
1366 | start = 0; | |
9eb99b94 | 1367 | end = tty3270_tty_rows(tp); |
65b77ccb SS |
1368 | break; |
1369 | default: | |
1370 | return; | |
1371 | } | |
1372 | for (i = start; i < end; i++) { | |
9c138af9 SS |
1373 | line = tty3270_get_write_line(tp, i); |
1374 | line->len = 0; | |
1375 | line->dirty = 1; | |
1da177e4 | 1376 | } |
1da177e4 LT |
1377 | } |
1378 | ||
1379 | /* | |
1380 | * Set attributes found in an escape sequence. | |
1381 | * Esc [ <attr> ; <attr> ; ... m | |
1382 | */ | |
e6d98bb8 | 1383 | static void tty3270_set_attributes(struct tty3270 *tp) |
1da177e4 | 1384 | { |
4043ea22 | 1385 | static unsigned char colors[] = { |
1da177e4 LT |
1386 | TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, |
1387 | TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT | |
1388 | }; | |
1389 | int i, attr; | |
1390 | ||
1391 | for (i = 0; i <= tp->esc_npar; i++) { | |
1392 | attr = tp->esc_par[i]; | |
1393 | switch (attr) { | |
1394 | case 0: /* Reset */ | |
c2e9375e | 1395 | tty3270_reset_attributes(&tp->attributes); |
1da177e4 LT |
1396 | break; |
1397 | /* Highlight. */ | |
1398 | case 4: /* Start underlining. */ | |
c2e9375e | 1399 | tp->attributes.highlight = TAX_UNDER; |
1da177e4 LT |
1400 | break; |
1401 | case 5: /* Start blink. */ | |
c2e9375e | 1402 | tp->attributes.highlight = TAX_BLINK; |
1da177e4 LT |
1403 | break; |
1404 | case 7: /* Start reverse. */ | |
c2e9375e | 1405 | tp->attributes.highlight = TAX_REVER; |
1da177e4 LT |
1406 | break; |
1407 | case 24: /* End underlining */ | |
c2e9375e SS |
1408 | if (tp->attributes.highlight == TAX_UNDER) |
1409 | tp->attributes.highlight = TAX_RESET; | |
1da177e4 LT |
1410 | break; |
1411 | case 25: /* End blink. */ | |
c2e9375e SS |
1412 | if (tp->attributes.highlight == TAX_BLINK) |
1413 | tp->attributes.highlight = TAX_RESET; | |
1da177e4 LT |
1414 | break; |
1415 | case 27: /* End reverse. */ | |
c2e9375e SS |
1416 | if (tp->attributes.highlight == TAX_REVER) |
1417 | tp->attributes.highlight = TAX_RESET; | |
1da177e4 LT |
1418 | break; |
1419 | /* Foreground color. */ | |
1420 | case 30: /* Black */ | |
1421 | case 31: /* Red */ | |
1422 | case 32: /* Green */ | |
1423 | case 33: /* Yellow */ | |
1424 | case 34: /* Blue */ | |
1425 | case 35: /* Magenta */ | |
1426 | case 36: /* Cyan */ | |
1427 | case 37: /* White */ | |
1428 | case 39: /* Black */ | |
4043ea22 SS |
1429 | tp->attributes.f_color = colors[attr - 30]; |
1430 | break; | |
1431 | /* Background color. */ | |
1432 | case 40: /* Black */ | |
1433 | case 41: /* Red */ | |
1434 | case 42: /* Green */ | |
1435 | case 43: /* Yellow */ | |
1436 | case 44: /* Blue */ | |
1437 | case 45: /* Magenta */ | |
1438 | case 46: /* Cyan */ | |
1439 | case 47: /* White */ | |
1440 | case 49: /* Black */ | |
1441 | tp->attributes.b_color = colors[attr - 40]; | |
1da177e4 LT |
1442 | break; |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | ||
e6d98bb8 | 1447 | static inline int tty3270_getpar(struct tty3270 *tp, int ix) |
1da177e4 LT |
1448 | { |
1449 | return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; | |
1450 | } | |
1451 | ||
e6d98bb8 | 1452 | static void tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) |
1da177e4 | 1453 | { |
4043ea22 SS |
1454 | struct tty3270_line *line; |
1455 | struct tty3270_cell *cell; | |
364c8558 HC |
1456 | int max_cx = max(0, cx); |
1457 | int max_cy = max(0, cy); | |
1458 | ||
1459 | tp->cx = min_t(int, tp->view.cols - 1, max_cx); | |
9c138af9 | 1460 | line = tty3270_get_write_line(tp, tp->cy); |
4043ea22 SS |
1461 | while (line->len < tp->cx) { |
1462 | cell = line->cells + line->len; | |
1463 | cell->character = ' '; | |
1464 | cell->attributes = tp->attributes; | |
1465 | line->len++; | |
1466 | } | |
9c138af9 | 1467 | tp->cy = min_t(int, tty3270_tty_rows(tp) - 1, max_cy); |
1da177e4 LT |
1468 | } |
1469 | ||
1470 | /* | |
1471 | * Process escape sequences. Known sequences: | |
1472 | * Esc 7 Save Cursor Position | |
1473 | * Esc 8 Restore Cursor Position | |
1474 | * Esc [ Pn ; Pn ; .. m Set attributes | |
1475 | * Esc [ Pn ; Pn H Cursor Position | |
1476 | * Esc [ Pn ; Pn f Cursor Position | |
1477 | * Esc [ Pn A Cursor Up | |
1478 | * Esc [ Pn B Cursor Down | |
1479 | * Esc [ Pn C Cursor Forward | |
1480 | * Esc [ Pn D Cursor Backward | |
1481 | * Esc [ Pn G Cursor Horizontal Absolute | |
1482 | * Esc [ Pn X Erase Characters | |
1483 | * Esc [ Ps J Erase in Display | |
1484 | * Esc [ Ps K Erase in Line | |
1485 | * // FIXME: add all the new ones. | |
1486 | * | |
1487 | * Pn is a numeric parameter, a string of zero or more decimal digits. | |
1488 | * Ps is a selective parameter. | |
1489 | */ | |
e6d98bb8 | 1490 | static void tty3270_escape_sequence(struct tty3270 *tp, char ch) |
1da177e4 | 1491 | { |
e4b57b93 | 1492 | enum { ESnormal, ESesc, ESsquare, ESparen, ESgetpars }; |
1da177e4 LT |
1493 | |
1494 | if (tp->esc_state == ESnormal) { | |
1495 | if (ch == 0x1b) | |
1496 | /* Starting new escape sequence. */ | |
1497 | tp->esc_state = ESesc; | |
1498 | return; | |
1499 | } | |
1500 | if (tp->esc_state == ESesc) { | |
1501 | tp->esc_state = ESnormal; | |
1502 | switch (ch) { | |
1503 | case '[': | |
1504 | tp->esc_state = ESsquare; | |
1505 | break; | |
e4b57b93 SS |
1506 | case '(': |
1507 | tp->esc_state = ESparen; | |
1508 | break; | |
1da177e4 LT |
1509 | case 'E': |
1510 | tty3270_cr(tp); | |
1511 | tty3270_lf(tp); | |
1512 | break; | |
1513 | case 'M': | |
1514 | tty3270_ri(tp); | |
1515 | break; | |
1516 | case 'D': | |
1517 | tty3270_lf(tp); | |
1518 | break; | |
1519 | case 'Z': /* Respond ID. */ | |
ba186e7d | 1520 | kbd_puts_queue(&tp->port, "\033[?6c"); |
1da177e4 LT |
1521 | break; |
1522 | case '7': /* Save cursor position. */ | |
1523 | tp->saved_cx = tp->cx; | |
1524 | tp->saved_cy = tp->cy; | |
c2e9375e | 1525 | tp->saved_attributes = tp->attributes; |
1da177e4 LT |
1526 | break; |
1527 | case '8': /* Restore cursor position. */ | |
1da177e4 | 1528 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); |
c2e9375e | 1529 | tp->attributes = tp->saved_attributes; |
1da177e4 LT |
1530 | break; |
1531 | case 'c': /* Reset terminal. */ | |
1532 | tp->cx = tp->saved_cx = 0; | |
1533 | tp->cy = tp->saved_cy = 0; | |
c2e9375e SS |
1534 | tty3270_reset_attributes(&tp->attributes); |
1535 | tty3270_reset_attributes(&tp->saved_attributes); | |
1da177e4 LT |
1536 | tty3270_erase_display(tp, 2); |
1537 | break; | |
1538 | } | |
1539 | return; | |
1540 | } | |
e4b57b93 SS |
1541 | |
1542 | switch (tp->esc_state) { | |
1543 | case ESparen: | |
1544 | tp->esc_state = ESnormal; | |
1545 | switch (ch) { | |
1546 | case 'B': | |
1547 | tp->attributes.alternate_charset = 0; | |
1548 | break; | |
1549 | case '0': | |
1550 | tp->attributes.alternate_charset = 1; | |
1551 | break; | |
1552 | } | |
1553 | return; | |
1554 | case ESsquare: | |
1da177e4 LT |
1555 | tp->esc_state = ESgetpars; |
1556 | memset(tp->esc_par, 0, sizeof(tp->esc_par)); | |
1557 | tp->esc_npar = 0; | |
1558 | tp->esc_ques = (ch == '?'); | |
1559 | if (tp->esc_ques) | |
1560 | return; | |
e4b57b93 SS |
1561 | fallthrough; |
1562 | case ESgetpars: | |
1da177e4 LT |
1563 | if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { |
1564 | tp->esc_npar++; | |
1565 | return; | |
1566 | } | |
1567 | if (ch >= '0' && ch <= '9') { | |
1568 | tp->esc_par[tp->esc_npar] *= 10; | |
1569 | tp->esc_par[tp->esc_npar] += ch - '0'; | |
1570 | return; | |
1571 | } | |
e4b57b93 SS |
1572 | break; |
1573 | default: | |
1574 | break; | |
1da177e4 LT |
1575 | } |
1576 | tp->esc_state = ESnormal; | |
1577 | if (ch == 'n' && !tp->esc_ques) { | |
1578 | if (tp->esc_par[0] == 5) /* Status report. */ | |
ba186e7d | 1579 | kbd_puts_queue(&tp->port, "\033[0n"); |
1da177e4 LT |
1580 | else if (tp->esc_par[0] == 6) { /* Cursor report. */ |
1581 | char buf[40]; | |
1582 | sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); | |
ba186e7d | 1583 | kbd_puts_queue(&tp->port, buf); |
1da177e4 LT |
1584 | } |
1585 | return; | |
1586 | } | |
1587 | if (tp->esc_ques) | |
1588 | return; | |
1589 | switch (ch) { | |
1590 | case 'm': | |
1591 | tty3270_set_attributes(tp); | |
1592 | break; | |
1593 | case 'H': /* Set cursor position. */ | |
1594 | case 'f': | |
1595 | tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, | |
1596 | tty3270_getpar(tp, 0) - 1); | |
1597 | break; | |
1598 | case 'd': /* Set y position. */ | |
1599 | tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); | |
1600 | break; | |
1601 | case 'A': /* Cursor up. */ | |
1602 | case 'F': | |
1603 | tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); | |
1604 | break; | |
1605 | case 'B': /* Cursor down. */ | |
1606 | case 'e': | |
1607 | case 'E': | |
1608 | tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); | |
1609 | break; | |
1610 | case 'C': /* Cursor forward. */ | |
1611 | case 'a': | |
1612 | tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); | |
1613 | break; | |
1614 | case 'D': /* Cursor backward. */ | |
1615 | tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); | |
1616 | break; | |
1617 | case 'G': /* Set x position. */ | |
1618 | case '`': | |
1619 | tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); | |
1620 | break; | |
1621 | case 'X': /* Erase Characters. */ | |
1622 | tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); | |
1623 | break; | |
1624 | case 'J': /* Erase display. */ | |
1625 | tty3270_erase_display(tp, tp->esc_par[0]); | |
1626 | break; | |
1627 | case 'K': /* Erase line. */ | |
1628 | tty3270_erase_line(tp, tp->esc_par[0]); | |
1629 | break; | |
1630 | case 'P': /* Delete characters. */ | |
1631 | tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); | |
1632 | break; | |
1633 | case '@': /* Insert characters. */ | |
1634 | tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); | |
1635 | break; | |
1636 | case 's': /* Save cursor position. */ | |
1637 | tp->saved_cx = tp->cx; | |
1638 | tp->saved_cy = tp->cy; | |
c2e9375e | 1639 | tp->saved_attributes = tp->attributes; |
1da177e4 LT |
1640 | break; |
1641 | case 'u': /* Restore cursor position. */ | |
1da177e4 | 1642 | tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); |
c2e9375e | 1643 | tp->attributes = tp->saved_attributes; |
1da177e4 LT |
1644 | break; |
1645 | } | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * String write routine for 3270 ttys | |
1650 | */ | |
e6d98bb8 SS |
1651 | static void tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty, |
1652 | const unsigned char *buf, int count) | |
1da177e4 LT |
1653 | { |
1654 | int i_msg, i; | |
1655 | ||
c17fe081 | 1656 | spin_lock_irq(&tp->view.lock); |
6e94dbc7 | 1657 | for (i_msg = 0; !tty->flow.stopped && i_msg < count; i_msg++) { |
1da177e4 LT |
1658 | if (tp->esc_state != 0) { |
1659 | /* Continue escape sequence. */ | |
1660 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1661 | continue; | |
1662 | } | |
1663 | ||
1664 | switch (buf[i_msg]) { | |
970cf9a9 SS |
1665 | case 0x00: |
1666 | break; | |
1da177e4 LT |
1667 | case 0x07: /* '\a' -- Alarm */ |
1668 | tp->wcc |= TW_PLUSALARM; | |
1669 | break; | |
1670 | case 0x08: /* Backspace. */ | |
1671 | if (tp->cx > 0) { | |
1672 | tp->cx--; | |
1673 | tty3270_put_character(tp, ' '); | |
1674 | } | |
1675 | break; | |
1676 | case 0x09: /* '\t' -- Tabulate */ | |
1677 | for (i = tp->cx % 8; i < 8; i++) { | |
1678 | if (tp->cx >= tp->view.cols) { | |
1679 | tty3270_cr(tp); | |
1680 | tty3270_lf(tp); | |
1681 | break; | |
1682 | } | |
1683 | tty3270_put_character(tp, ' '); | |
1684 | tp->cx++; | |
1685 | } | |
1686 | break; | |
1687 | case 0x0a: /* '\n' -- New Line */ | |
1688 | tty3270_cr(tp); | |
1689 | tty3270_lf(tp); | |
1690 | break; | |
1691 | case 0x0c: /* '\f' -- Form Feed */ | |
1692 | tty3270_erase_display(tp, 2); | |
1693 | tp->cx = tp->cy = 0; | |
1694 | break; | |
1695 | case 0x0d: /* '\r' -- Carriage Return */ | |
1696 | tp->cx = 0; | |
1697 | break; | |
94dbb0a7 SS |
1698 | case 0x0e: |
1699 | tp->attributes.alternate_charset = 1; | |
1700 | break; | |
1da177e4 | 1701 | case 0x0f: /* SuSE "exit alternate mode" */ |
94dbb0a7 | 1702 | tp->attributes.alternate_charset = 0; |
1da177e4 LT |
1703 | break; |
1704 | case 0x1b: /* Start escape sequence. */ | |
1705 | tty3270_escape_sequence(tp, buf[i_msg]); | |
1706 | break; | |
1707 | default: /* Insert normal character. */ | |
1708 | if (tp->cx >= tp->view.cols) { | |
1709 | tty3270_cr(tp); | |
1710 | tty3270_lf(tp); | |
1711 | } | |
1712 | tty3270_put_character(tp, buf[i_msg]); | |
1713 | tp->cx++; | |
1714 | break; | |
1715 | } | |
1716 | } | |
1da177e4 LT |
1717 | /* Setup timer to update display after 1/10 second */ |
1718 | if (!timer_pending(&tp->timer)) | |
1719 | tty3270_set_timer(tp, HZ/10); | |
1720 | ||
c17fe081 | 1721 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
1722 | } |
1723 | ||
1724 | /* | |
1725 | * String write routine for 3270 ttys | |
1726 | */ | |
e6d98bb8 SS |
1727 | static int tty3270_write(struct tty_struct *tty, |
1728 | const unsigned char *buf, int count) | |
1da177e4 LT |
1729 | { |
1730 | struct tty3270 *tp; | |
1731 | ||
1732 | tp = tty->driver_data; | |
1733 | if (!tp) | |
1734 | return 0; | |
1735 | if (tp->char_count > 0) { | |
20acdfa8 | 1736 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1737 | tp->char_count = 0; |
1738 | } | |
20acdfa8 | 1739 | tty3270_do_write(tp, tty, buf, count); |
1da177e4 LT |
1740 | return count; |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * Put single characters to the ttys character buffer | |
1745 | */ | |
74c76c84 | 1746 | static int tty3270_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1747 | { |
1748 | struct tty3270 *tp; | |
1749 | ||
1750 | tp = tty->driver_data; | |
74c76c84 HC |
1751 | if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE) |
1752 | return 0; | |
1753 | tp->char_buf[tp->char_count++] = ch; | |
1754 | return 1; | |
1da177e4 LT |
1755 | } |
1756 | ||
1757 | /* | |
1758 | * Flush all characters from the ttys characeter buffer put there | |
1759 | * by tty3270_put_char. | |
1760 | */ | |
e6d98bb8 | 1761 | static void tty3270_flush_chars(struct tty_struct *tty) |
1da177e4 LT |
1762 | { |
1763 | struct tty3270 *tp; | |
1764 | ||
1765 | tp = tty->driver_data; | |
1766 | if (!tp) | |
1767 | return; | |
1768 | if (tp->char_count > 0) { | |
20acdfa8 | 1769 | tty3270_do_write(tp, tty, tp->char_buf, tp->char_count); |
1da177e4 LT |
1770 | tp->char_count = 0; |
1771 | } | |
1772 | } | |
1773 | ||
1da177e4 LT |
1774 | /* |
1775 | * Check for visible/invisible input switches | |
1776 | */ | |
e6d98bb8 | 1777 | static void tty3270_set_termios(struct tty_struct *tty, const struct ktermios *old) |
1da177e4 LT |
1778 | { |
1779 | struct tty3270 *tp; | |
1780 | int new; | |
1781 | ||
1782 | tp = tty->driver_data; | |
1783 | if (!tp) | |
1784 | return; | |
c17fe081 | 1785 | spin_lock_irq(&tp->view.lock); |
1da177e4 LT |
1786 | if (L_ICANON(tty)) { |
1787 | new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; | |
1788 | if (new != tp->inattr) { | |
1789 | tp->inattr = new; | |
d2c993d8 | 1790 | tty3270_update_prompt(tp, NULL, 0); |
1da177e4 LT |
1791 | tty3270_set_timer(tp, 1); |
1792 | } | |
1793 | } | |
c17fe081 | 1794 | spin_unlock_irq(&tp->view.lock); |
1da177e4 LT |
1795 | } |
1796 | ||
1797 | /* | |
1798 | * Disable reading from a 3270 tty | |
1799 | */ | |
e6d98bb8 | 1800 | static void tty3270_throttle(struct tty_struct *tty) |
1da177e4 LT |
1801 | { |
1802 | struct tty3270 *tp; | |
1803 | ||
1804 | tp = tty->driver_data; | |
1805 | if (!tp) | |
1806 | return; | |
1807 | tp->throttle = 1; | |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * Enable reading from a 3270 tty | |
1812 | */ | |
e6d98bb8 | 1813 | static void tty3270_unthrottle(struct tty_struct *tty) |
1da177e4 LT |
1814 | { |
1815 | struct tty3270 *tp; | |
1816 | ||
1817 | tp = tty->driver_data; | |
1818 | if (!tp) | |
1819 | return; | |
1820 | tp->throttle = 0; | |
1821 | if (tp->attn) | |
1822 | tty3270_issue_read(tp, 1); | |
1823 | } | |
1824 | ||
1825 | /* | |
1826 | * Hang up the tty device. | |
1827 | */ | |
e6d98bb8 | 1828 | static void tty3270_hangup(struct tty_struct *tty) |
1da177e4 | 1829 | { |
0c756914 MS |
1830 | struct tty3270 *tp; |
1831 | ||
1832 | tp = tty->driver_data; | |
1833 | if (!tp) | |
1834 | return; | |
c17fe081 | 1835 | spin_lock_irq(&tp->view.lock); |
0c756914 MS |
1836 | tp->cx = tp->saved_cx = 0; |
1837 | tp->cy = tp->saved_cy = 0; | |
c2e9375e SS |
1838 | tty3270_reset_attributes(&tp->attributes); |
1839 | tty3270_reset_attributes(&tp->saved_attributes); | |
0c756914 | 1840 | tty3270_blank_screen(tp); |
0c756914 | 1841 | tp->update_flags = TTY_UPDATE_ALL; |
c17fe081 | 1842 | spin_unlock_irq(&tp->view.lock); |
0c756914 | 1843 | tty3270_set_timer(tp, 1); |
1da177e4 LT |
1844 | } |
1845 | ||
e6d98bb8 | 1846 | static void tty3270_wait_until_sent(struct tty_struct *tty, int timeout) |
1da177e4 LT |
1847 | { |
1848 | } | |
1849 | ||
65c56e07 HC |
1850 | static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd, |
1851 | unsigned long arg) | |
1da177e4 LT |
1852 | { |
1853 | struct tty3270 *tp; | |
1854 | ||
1855 | tp = tty->driver_data; | |
1856 | if (!tp) | |
1857 | return -ENODEV; | |
18900ca6 | 1858 | if (tty_io_error(tty)) |
1da177e4 | 1859 | return -EIO; |
65c56e07 | 1860 | return kbd_ioctl(tp->kbd, cmd, arg); |
1da177e4 LT |
1861 | } |
1862 | ||
9d4bfd41 | 1863 | #ifdef CONFIG_COMPAT |
65c56e07 HC |
1864 | static long tty3270_compat_ioctl(struct tty_struct *tty, |
1865 | unsigned int cmd, unsigned long arg) | |
9d4bfd41 AB |
1866 | { |
1867 | struct tty3270 *tp; | |
1868 | ||
1869 | tp = tty->driver_data; | |
1870 | if (!tp) | |
1871 | return -ENODEV; | |
18900ca6 | 1872 | if (tty_io_error(tty)) |
9d4bfd41 | 1873 | return -EIO; |
65c56e07 | 1874 | return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg)); |
9d4bfd41 AB |
1875 | } |
1876 | #endif | |
1877 | ||
b68e31d0 | 1878 | static const struct tty_operations tty3270_ops = { |
20cda6f2 JS |
1879 | .install = tty3270_install, |
1880 | .cleanup = tty3270_cleanup, | |
736c9fd2 | 1881 | .open = tty3270_open, |
1da177e4 LT |
1882 | .close = tty3270_close, |
1883 | .write = tty3270_write, | |
1884 | .put_char = tty3270_put_char, | |
1885 | .flush_chars = tty3270_flush_chars, | |
1886 | .write_room = tty3270_write_room, | |
1da177e4 LT |
1887 | .throttle = tty3270_throttle, |
1888 | .unthrottle = tty3270_unthrottle, | |
1889 | .hangup = tty3270_hangup, | |
1890 | .wait_until_sent = tty3270_wait_until_sent, | |
1891 | .ioctl = tty3270_ioctl, | |
9d4bfd41 AB |
1892 | #ifdef CONFIG_COMPAT |
1893 | .compat_ioctl = tty3270_compat_ioctl, | |
1894 | #endif | |
1da177e4 LT |
1895 | .set_termios = tty3270_set_termios |
1896 | }; | |
1897 | ||
63df41d6 | 1898 | static void tty3270_create_cb(int minor) |
c95571e6 | 1899 | { |
1fcbba3d | 1900 | tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL); |
c95571e6 MS |
1901 | } |
1902 | ||
63df41d6 | 1903 | static void tty3270_destroy_cb(int minor) |
c95571e6 | 1904 | { |
1fcbba3d | 1905 | tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR); |
c95571e6 MS |
1906 | } |
1907 | ||
63df41d6 | 1908 | static struct raw3270_notifier tty3270_notifier = |
c95571e6 MS |
1909 | { |
1910 | .create = tty3270_create_cb, | |
1911 | .destroy = tty3270_destroy_cb, | |
1912 | }; | |
1913 | ||
1da177e4 LT |
1914 | /* |
1915 | * 3270 tty registration code called from tty_init(). | |
1916 | * Most kernel services (incl. kmalloc) are available at this poimt. | |
1917 | */ | |
2b67fc46 | 1918 | static int __init tty3270_init(void) |
1da177e4 LT |
1919 | { |
1920 | struct tty_driver *driver; | |
1921 | int ret; | |
1922 | ||
c95571e6 MS |
1923 | driver = tty_alloc_driver(RAW3270_MAXDEVS, |
1924 | TTY_DRIVER_REAL_RAW | | |
1925 | TTY_DRIVER_DYNAMIC_DEV | | |
1926 | TTY_DRIVER_RESET_TERMIOS); | |
1927 | if (IS_ERR(driver)) | |
1928 | return PTR_ERR(driver); | |
1da177e4 LT |
1929 | |
1930 | /* | |
1931 | * Initialize the tty_driver structure | |
1932 | * Entries in tty3270_driver that are NOT initialized: | |
1933 | * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc | |
1934 | */ | |
c95571e6 MS |
1935 | driver->driver_name = "tty3270"; |
1936 | driver->name = "3270/tty"; | |
1da177e4 | 1937 | driver->major = IBM_TTY3270_MAJOR; |
1fcbba3d MS |
1938 | driver->minor_start = RAW3270_FIRSTMINOR; |
1939 | driver->name_base = RAW3270_FIRSTMINOR; | |
1da177e4 LT |
1940 | driver->type = TTY_DRIVER_TYPE_SYSTEM; |
1941 | driver->subtype = SYSTEM_TYPE_TTY; | |
1942 | driver->init_termios = tty_std_termios; | |
1da177e4 LT |
1943 | tty_set_operations(driver, &tty3270_ops); |
1944 | ret = tty_register_driver(driver); | |
1945 | if (ret) { | |
9f90a4dd | 1946 | tty_driver_kref_put(driver); |
1da177e4 LT |
1947 | return ret; |
1948 | } | |
1949 | tty3270_driver = driver; | |
c95571e6 | 1950 | raw3270_register_notifier(&tty3270_notifier); |
1da177e4 LT |
1951 | return 0; |
1952 | } | |
1953 | ||
e6d98bb8 | 1954 | static void __exit tty3270_exit(void) |
1da177e4 LT |
1955 | { |
1956 | struct tty_driver *driver; | |
1957 | ||
c95571e6 | 1958 | raw3270_unregister_notifier(&tty3270_notifier); |
1da177e4 | 1959 | driver = tty3270_driver; |
d2c993d8 | 1960 | tty3270_driver = NULL; |
1da177e4 | 1961 | tty_unregister_driver(driver); |
9f90a4dd | 1962 | tty_driver_kref_put(driver); |
1da177e4 LT |
1963 | tty3270_del_views(); |
1964 | } | |
1965 | ||
c17fe081 SS |
1966 | #if IS_ENABLED(CONFIG_TN3270_CONSOLE) |
1967 | static void | |
1968 | con3270_write(struct console *co, const char *str, unsigned int count) | |
1969 | { | |
1970 | struct tty3270 *tp = co->data; | |
1971 | unsigned long flags; | |
1972 | char c; | |
1973 | ||
1974 | spin_lock_irqsave(&tp->view.lock, flags); | |
1975 | while (count--) { | |
1976 | c = *str++; | |
1977 | if (c == 0x0a) { | |
1978 | tty3270_cr(tp); | |
1979 | tty3270_lf(tp); | |
1980 | } else { | |
1981 | if (tp->cx >= tp->view.cols) { | |
1982 | tty3270_cr(tp); | |
1983 | tty3270_lf(tp); | |
1984 | } | |
1985 | tty3270_put_character(tp, c); | |
1986 | tp->cx++; | |
1987 | } | |
1988 | } | |
1989 | spin_unlock_irqrestore(&tp->view.lock, flags); | |
1990 | } | |
1991 | ||
1992 | static struct tty_driver * | |
1993 | con3270_device(struct console *c, int *index) | |
1994 | { | |
1995 | *index = c->index; | |
1996 | return tty3270_driver; | |
1997 | } | |
1998 | ||
1999 | static void | |
2000 | con3270_wait_write(struct tty3270 *tp) | |
2001 | { | |
2002 | while (!tp->write) { | |
2003 | raw3270_wait_cons_dev(tp->view.dev); | |
2004 | barrier(); | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | /* | |
2009 | * The below function is called as a panic/reboot notifier before the | |
2010 | * system enters a disabled, endless loop. | |
2011 | * | |
2012 | * Notice we must use the spin_trylock() alternative, to prevent lockups | |
2013 | * in atomic context (panic routine runs with secondary CPUs, local IRQs | |
2014 | * and preemption disabled). | |
2015 | */ | |
2016 | static int con3270_notify(struct notifier_block *self, | |
2017 | unsigned long event, void *data) | |
2018 | { | |
2019 | struct tty3270 *tp; | |
2020 | unsigned long flags; | |
2021 | ||
2022 | tp = condev; | |
2023 | if (!tp->view.dev) | |
2024 | return NOTIFY_DONE; | |
2025 | if (!raw3270_view_lock_unavailable(&tp->view)) | |
2026 | raw3270_activate_view(&tp->view); | |
2027 | if (!spin_trylock_irqsave(&tp->view.lock, flags)) | |
2028 | return NOTIFY_DONE; | |
2029 | con3270_wait_write(tp); | |
2030 | tp->nr_up = 0; | |
2031 | while (tp->update_flags != 0) { | |
2032 | spin_unlock_irqrestore(&tp->view.lock, flags); | |
2033 | tty3270_update(&tp->timer); | |
2034 | spin_lock_irqsave(&tp->view.lock, flags); | |
2035 | con3270_wait_write(tp); | |
2036 | } | |
2037 | spin_unlock_irqrestore(&tp->view.lock, flags); | |
2038 | return NOTIFY_DONE; | |
2039 | } | |
2040 | ||
2041 | static struct notifier_block on_panic_nb = { | |
2042 | .notifier_call = con3270_notify, | |
2043 | .priority = INT_MIN + 1, /* run the callback late */ | |
2044 | }; | |
2045 | ||
2046 | static struct notifier_block on_reboot_nb = { | |
2047 | .notifier_call = con3270_notify, | |
2048 | .priority = INT_MIN + 1, /* run the callback late */ | |
2049 | }; | |
2050 | ||
2051 | static struct console con3270 = { | |
2052 | .name = "tty3270", | |
2053 | .write = con3270_write, | |
2054 | .device = con3270_device, | |
2055 | .flags = CON_PRINTBUFFER, | |
2056 | }; | |
2057 | ||
2058 | static int __init | |
2059 | con3270_init(void) | |
2060 | { | |
2061 | struct raw3270_view *view; | |
2062 | struct raw3270 *rp; | |
2063 | struct tty3270 *tp; | |
2064 | int rc; | |
2065 | ||
2066 | /* Check if 3270 is to be the console */ | |
2067 | if (!CONSOLE_IS_3270) | |
2068 | return -ENODEV; | |
2069 | ||
2070 | /* Set the console mode for VM */ | |
2071 | if (MACHINE_IS_VM) { | |
2072 | cpcmd("TERM CONMODE 3270", NULL, 0, NULL); | |
2073 | cpcmd("TERM AUTOCR OFF", NULL, 0, NULL); | |
2074 | } | |
2075 | ||
2076 | rp = raw3270_setup_console(); | |
2077 | if (IS_ERR(rp)) | |
2078 | return PTR_ERR(rp); | |
2079 | ||
2080 | /* Check if the tty3270 is already there. */ | |
2081 | view = raw3270_find_view(&tty3270_fn, RAW3270_FIRSTMINOR); | |
2082 | if (IS_ERR(view)) { | |
2083 | rc = tty3270_create_view(0, &tp); | |
2084 | if (rc) | |
2085 | return rc; | |
2086 | } else { | |
2087 | tp = container_of(view, struct tty3270, view); | |
2088 | tp->inattr = TF_INPUT; | |
2089 | } | |
2090 | con3270.data = tp; | |
2091 | condev = tp; | |
2092 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); | |
2093 | register_reboot_notifier(&on_reboot_nb); | |
2094 | register_console(&con3270); | |
2095 | return 0; | |
2096 | } | |
2097 | console_initcall(con3270_init); | |
2098 | #endif | |
2099 | ||
1da177e4 LT |
2100 | MODULE_LICENSE("GPL"); |
2101 | MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); | |
2102 | ||
2103 | module_init(tty3270_init); | |
2104 | module_exit(tty3270_exit); |