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Commit | Line | Data |
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ee8a4b7f HL |
1 | /* |
2 | * interface to user space for the gigaset driver | |
3 | * | |
4 | * Copyright (c) 2004 by Hansjoerg Lipp <hjlipp@web.de> | |
5 | * | |
6 | * ===================================================================== | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as | |
9 | * published by the Free Software Foundation; either version 2 of | |
10 | * the License, or (at your option) any later version. | |
11 | * ===================================================================== | |
ee8a4b7f HL |
12 | */ |
13 | ||
14 | #include "gigaset.h" | |
15 | #include <linux/gigaset_dev.h> | |
16 | #include <linux/tty.h> | |
17 | #include <linux/tty_flip.h> | |
18 | ||
19 | /*** our ioctls ***/ | |
20 | ||
21 | static int if_lock(struct cardstate *cs, int *arg) | |
22 | { | |
23 | int cmd = *arg; | |
24 | ||
784d5858 | 25 | gig_dbg(DEBUG_IF, "%u: if_lock (%d)", cs->minor_index, cmd); |
ee8a4b7f HL |
26 | |
27 | if (cmd > 1) | |
28 | return -EINVAL; | |
29 | ||
30 | if (cmd < 0) { | |
31 | *arg = atomic_read(&cs->mstate) == MS_LOCKED; //FIXME remove? | |
32 | return 0; | |
33 | } | |
34 | ||
35 | if (!cmd && atomic_read(&cs->mstate) == MS_LOCKED | |
69049cc8 | 36 | && cs->connected) { |
ee8a4b7f HL |
37 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); |
38 | cs->ops->baud_rate(cs, B115200); | |
39 | cs->ops->set_line_ctrl(cs, CS8); | |
40 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
41 | } | |
42 | ||
43 | cs->waiting = 1; | |
44 | if (!gigaset_add_event(cs, &cs->at_state, EV_IF_LOCK, | |
784d5858 | 45 | NULL, cmd, NULL)) { |
ee8a4b7f HL |
46 | cs->waiting = 0; |
47 | return -ENOMEM; | |
48 | } | |
49 | ||
784d5858 | 50 | gig_dbg(DEBUG_CMD, "scheduling IF_LOCK"); |
ee8a4b7f HL |
51 | gigaset_schedule_event(cs); |
52 | ||
53 | wait_event(cs->waitqueue, !cs->waiting); | |
54 | ||
55 | if (cs->cmd_result >= 0) { | |
56 | *arg = cs->cmd_result; | |
57 | return 0; | |
58 | } | |
59 | ||
60 | return cs->cmd_result; | |
61 | } | |
62 | ||
63 | static int if_version(struct cardstate *cs, unsigned arg[4]) | |
64 | { | |
65 | static const unsigned version[4] = GIG_VERSION; | |
66 | static const unsigned compat[4] = GIG_COMPAT; | |
67 | unsigned cmd = arg[0]; | |
68 | ||
784d5858 | 69 | gig_dbg(DEBUG_IF, "%u: if_version (%d)", cs->minor_index, cmd); |
ee8a4b7f HL |
70 | |
71 | switch (cmd) { | |
72 | case GIGVER_DRIVER: | |
73 | memcpy(arg, version, sizeof version); | |
74 | return 0; | |
75 | case GIGVER_COMPAT: | |
76 | memcpy(arg, compat, sizeof compat); | |
77 | return 0; | |
78 | case GIGVER_FWBASE: | |
79 | cs->waiting = 1; | |
80 | if (!gigaset_add_event(cs, &cs->at_state, EV_IF_VER, | |
784d5858 | 81 | NULL, 0, arg)) { |
ee8a4b7f HL |
82 | cs->waiting = 0; |
83 | return -ENOMEM; | |
84 | } | |
85 | ||
784d5858 | 86 | gig_dbg(DEBUG_CMD, "scheduling IF_VER"); |
ee8a4b7f HL |
87 | gigaset_schedule_event(cs); |
88 | ||
89 | wait_event(cs->waitqueue, !cs->waiting); | |
90 | ||
91 | if (cs->cmd_result >= 0) | |
92 | return 0; | |
93 | ||
94 | return cs->cmd_result; | |
95 | default: | |
96 | return -EINVAL; | |
97 | } | |
98 | } | |
99 | ||
100 | static int if_config(struct cardstate *cs, int *arg) | |
101 | { | |
784d5858 | 102 | gig_dbg(DEBUG_IF, "%u: if_config (%d)", cs->minor_index, *arg); |
ee8a4b7f HL |
103 | |
104 | if (*arg != 1) | |
105 | return -EINVAL; | |
106 | ||
107 | if (atomic_read(&cs->mstate) != MS_LOCKED) | |
108 | return -EBUSY; | |
109 | ||
69049cc8 TS |
110 | if (!cs->connected) { |
111 | err("not connected!"); | |
112 | return -ENODEV; | |
113 | } | |
114 | ||
ee8a4b7f HL |
115 | *arg = 0; |
116 | return gigaset_enterconfigmode(cs); | |
117 | } | |
118 | ||
119 | /*** the terminal driver ***/ | |
120 | /* stolen from usbserial and some other tty drivers */ | |
121 | ||
122 | static int if_open(struct tty_struct *tty, struct file *filp); | |
123 | static void if_close(struct tty_struct *tty, struct file *filp); | |
124 | static int if_ioctl(struct tty_struct *tty, struct file *file, | |
784d5858 | 125 | unsigned int cmd, unsigned long arg); |
ee8a4b7f HL |
126 | static int if_write_room(struct tty_struct *tty); |
127 | static int if_chars_in_buffer(struct tty_struct *tty); | |
128 | static void if_throttle(struct tty_struct *tty); | |
129 | static void if_unthrottle(struct tty_struct *tty); | |
130 | static void if_set_termios(struct tty_struct *tty, struct termios *old); | |
131 | static int if_tiocmget(struct tty_struct *tty, struct file *file); | |
132 | static int if_tiocmset(struct tty_struct *tty, struct file *file, | |
784d5858 | 133 | unsigned int set, unsigned int clear); |
ee8a4b7f | 134 | static int if_write(struct tty_struct *tty, |
784d5858 | 135 | const unsigned char *buf, int count); |
ee8a4b7f | 136 | |
b68e31d0 | 137 | static const struct tty_operations if_ops = { |
ee8a4b7f HL |
138 | .open = if_open, |
139 | .close = if_close, | |
140 | .ioctl = if_ioctl, | |
141 | .write = if_write, | |
142 | .write_room = if_write_room, | |
143 | .chars_in_buffer = if_chars_in_buffer, | |
144 | .set_termios = if_set_termios, | |
145 | .throttle = if_throttle, | |
146 | .unthrottle = if_unthrottle, | |
147 | #if 0 | |
148 | .break_ctl = serial_break, | |
149 | #endif | |
150 | .tiocmget = if_tiocmget, | |
151 | .tiocmset = if_tiocmset, | |
152 | }; | |
153 | ||
154 | static int if_open(struct tty_struct *tty, struct file *filp) | |
155 | { | |
156 | struct cardstate *cs; | |
157 | unsigned long flags; | |
158 | ||
784d5858 TS |
159 | gig_dbg(DEBUG_IF, "%d+%d: %s()", |
160 | tty->driver->minor_start, tty->index, __func__); | |
ee8a4b7f HL |
161 | |
162 | tty->driver_data = NULL; | |
163 | ||
164 | cs = gigaset_get_cs_by_tty(tty); | |
165 | if (!cs) | |
166 | return -ENODEV; | |
167 | ||
abfd1dc7 | 168 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
169 | return -ERESTARTSYS; // FIXME -EINTR? |
170 | tty->driver_data = cs; | |
171 | ||
172 | ++cs->open_count; | |
173 | ||
174 | if (cs->open_count == 1) { | |
175 | spin_lock_irqsave(&cs->lock, flags); | |
176 | cs->tty = tty; | |
177 | spin_unlock_irqrestore(&cs->lock, flags); | |
178 | tty->low_latency = 1; //FIXME test | |
ee8a4b7f HL |
179 | } |
180 | ||
abfd1dc7 | 181 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
182 | return 0; |
183 | } | |
184 | ||
185 | static void if_close(struct tty_struct *tty, struct file *filp) | |
186 | { | |
187 | struct cardstate *cs; | |
188 | unsigned long flags; | |
189 | ||
190 | cs = (struct cardstate *) tty->driver_data; | |
191 | if (!cs) { | |
784d5858 | 192 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
193 | return; |
194 | } | |
195 | ||
784d5858 | 196 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 197 | |
abfd1dc7 | 198 | mutex_lock(&cs->mutex); |
ee8a4b7f HL |
199 | |
200 | if (!cs->open_count) | |
784d5858 | 201 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
202 | else { |
203 | if (!--cs->open_count) { | |
204 | spin_lock_irqsave(&cs->lock, flags); | |
205 | cs->tty = NULL; | |
206 | spin_unlock_irqrestore(&cs->lock, flags); | |
ee8a4b7f HL |
207 | } |
208 | } | |
209 | ||
abfd1dc7 | 210 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
211 | } |
212 | ||
213 | static int if_ioctl(struct tty_struct *tty, struct file *file, | |
784d5858 | 214 | unsigned int cmd, unsigned long arg) |
ee8a4b7f HL |
215 | { |
216 | struct cardstate *cs; | |
217 | int retval = -ENODEV; | |
218 | int int_arg; | |
219 | unsigned char buf[6]; | |
220 | unsigned version[4]; | |
221 | ||
222 | cs = (struct cardstate *) tty->driver_data; | |
223 | if (!cs) { | |
784d5858 | 224 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
225 | return -ENODEV; |
226 | } | |
227 | ||
784d5858 | 228 | gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd); |
ee8a4b7f | 229 | |
abfd1dc7 | 230 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
231 | return -ERESTARTSYS; // FIXME -EINTR? |
232 | ||
233 | if (!cs->open_count) | |
784d5858 | 234 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
235 | else { |
236 | retval = 0; | |
237 | switch (cmd) { | |
238 | case GIGASET_REDIR: | |
239 | retval = get_user(int_arg, (int __user *) arg); | |
240 | if (retval >= 0) | |
241 | retval = if_lock(cs, &int_arg); | |
242 | if (retval >= 0) | |
243 | retval = put_user(int_arg, (int __user *) arg); | |
244 | break; | |
245 | case GIGASET_CONFIG: | |
246 | retval = get_user(int_arg, (int __user *) arg); | |
247 | if (retval >= 0) | |
248 | retval = if_config(cs, &int_arg); | |
249 | if (retval >= 0) | |
250 | retval = put_user(int_arg, (int __user *) arg); | |
251 | break; | |
252 | case GIGASET_BRKCHARS: | |
253 | //FIXME test if MS_LOCKED | |
69049cc8 | 254 | if (!cs->connected) { |
784d5858 | 255 | gig_dbg(DEBUG_ANY, |
917f5085 | 256 | "can't communicate with unplugged device"); |
ee8a4b7f HL |
257 | retval = -ENODEV; |
258 | break; | |
259 | } | |
260 | retval = copy_from_user(&buf, | |
784d5858 TS |
261 | (const unsigned char __user *) arg, 6) |
262 | ? -EFAULT : 0; | |
01371500 TS |
263 | if (retval >= 0) { |
264 | gigaset_dbg_buffer(DEBUG_IF, "GIGASET_BRKCHARS", | |
265 | 6, (const unsigned char *) arg); | |
ee8a4b7f | 266 | retval = cs->ops->brkchars(cs, buf); |
01371500 | 267 | } |
ee8a4b7f HL |
268 | break; |
269 | case GIGASET_VERSION: | |
917f5085 | 270 | retval = copy_from_user(version, |
784d5858 TS |
271 | (unsigned __user *) arg, sizeof version) |
272 | ? -EFAULT : 0; | |
ee8a4b7f HL |
273 | if (retval >= 0) |
274 | retval = if_version(cs, version); | |
275 | if (retval >= 0) | |
917f5085 | 276 | retval = copy_to_user((unsigned __user *) arg, |
784d5858 TS |
277 | version, sizeof version) |
278 | ? -EFAULT : 0; | |
ee8a4b7f | 279 | break; |
784d5858 TS |
280 | default: |
281 | gig_dbg(DEBUG_ANY, "%s: arg not supported - 0x%04x", | |
282 | __func__, cmd); | |
ee8a4b7f HL |
283 | retval = -ENOIOCTLCMD; |
284 | } | |
285 | } | |
286 | ||
abfd1dc7 | 287 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
288 | |
289 | return retval; | |
290 | } | |
291 | ||
292 | static int if_tiocmget(struct tty_struct *tty, struct file *file) | |
293 | { | |
294 | struct cardstate *cs; | |
295 | int retval; | |
296 | ||
297 | cs = (struct cardstate *) tty->driver_data; | |
298 | if (!cs) { | |
784d5858 | 299 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
300 | return -ENODEV; |
301 | } | |
302 | ||
784d5858 | 303 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 304 | |
abfd1dc7 | 305 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
306 | return -ERESTARTSYS; // FIXME -EINTR? |
307 | ||
308 | // FIXME read from device? | |
309 | retval = cs->control_state & (TIOCM_RTS|TIOCM_DTR); | |
310 | ||
abfd1dc7 | 311 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
312 | |
313 | return retval; | |
314 | } | |
315 | ||
316 | static int if_tiocmset(struct tty_struct *tty, struct file *file, | |
784d5858 | 317 | unsigned int set, unsigned int clear) |
ee8a4b7f HL |
318 | { |
319 | struct cardstate *cs; | |
320 | int retval; | |
321 | unsigned mc; | |
322 | ||
323 | cs = (struct cardstate *) tty->driver_data; | |
324 | if (!cs) { | |
784d5858 | 325 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
326 | return -ENODEV; |
327 | } | |
328 | ||
784d5858 TS |
329 | gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)", |
330 | cs->minor_index, __func__, set, clear); | |
ee8a4b7f | 331 | |
abfd1dc7 | 332 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
333 | return -ERESTARTSYS; // FIXME -EINTR? |
334 | ||
69049cc8 | 335 | if (!cs->connected) { |
784d5858 | 336 | gig_dbg(DEBUG_ANY, "can't communicate with unplugged device"); |
ee8a4b7f HL |
337 | retval = -ENODEV; |
338 | } else { | |
339 | mc = (cs->control_state | set) & ~clear & (TIOCM_RTS|TIOCM_DTR); | |
340 | retval = cs->ops->set_modem_ctrl(cs, cs->control_state, mc); | |
341 | cs->control_state = mc; | |
342 | } | |
343 | ||
abfd1dc7 | 344 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
345 | |
346 | return retval; | |
347 | } | |
348 | ||
349 | static int if_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
350 | { | |
351 | struct cardstate *cs; | |
352 | int retval = -ENODEV; | |
353 | ||
354 | cs = (struct cardstate *) tty->driver_data; | |
355 | if (!cs) { | |
784d5858 | 356 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
357 | return -ENODEV; |
358 | } | |
359 | ||
784d5858 | 360 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 361 | |
abfd1dc7 | 362 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
363 | return -ERESTARTSYS; // FIXME -EINTR? |
364 | ||
365 | if (!cs->open_count) | |
784d5858 | 366 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
367 | else if (atomic_read(&cs->mstate) != MS_LOCKED) { |
368 | warn("can't write to unlocked device"); | |
369 | retval = -EBUSY; | |
69049cc8 | 370 | } else if (!cs->connected) { |
784d5858 | 371 | gig_dbg(DEBUG_ANY, "can't write to unplugged device"); |
ee8a4b7f HL |
372 | retval = -EBUSY; //FIXME |
373 | } else { | |
374 | retval = cs->ops->write_cmd(cs, buf, count, | |
784d5858 | 375 | &cs->if_wake_tasklet); |
ee8a4b7f HL |
376 | } |
377 | ||
abfd1dc7 | 378 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
379 | |
380 | return retval; | |
381 | } | |
382 | ||
383 | static int if_write_room(struct tty_struct *tty) | |
384 | { | |
385 | struct cardstate *cs; | |
386 | int retval = -ENODEV; | |
387 | ||
388 | cs = (struct cardstate *) tty->driver_data; | |
389 | if (!cs) { | |
784d5858 | 390 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
391 | return -ENODEV; |
392 | } | |
393 | ||
784d5858 | 394 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 395 | |
abfd1dc7 | 396 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
397 | return -ERESTARTSYS; // FIXME -EINTR? |
398 | ||
399 | if (!cs->open_count) | |
784d5858 | 400 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
401 | else if (atomic_read(&cs->mstate) != MS_LOCKED) { |
402 | warn("can't write to unlocked device"); | |
403 | retval = -EBUSY; //FIXME | |
69049cc8 | 404 | } else if (!cs->connected) { |
784d5858 | 405 | gig_dbg(DEBUG_ANY, "can't write to unplugged device"); |
ee8a4b7f HL |
406 | retval = -EBUSY; //FIXME |
407 | } else | |
408 | retval = cs->ops->write_room(cs); | |
409 | ||
abfd1dc7 | 410 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
411 | |
412 | return retval; | |
413 | } | |
414 | ||
415 | static int if_chars_in_buffer(struct tty_struct *tty) | |
416 | { | |
417 | struct cardstate *cs; | |
418 | int retval = -ENODEV; | |
419 | ||
420 | cs = (struct cardstate *) tty->driver_data; | |
421 | if (!cs) { | |
784d5858 | 422 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
423 | return -ENODEV; |
424 | } | |
425 | ||
784d5858 | 426 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 427 | |
abfd1dc7 | 428 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
429 | return -ERESTARTSYS; // FIXME -EINTR? |
430 | ||
431 | if (!cs->open_count) | |
784d5858 | 432 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
433 | else if (atomic_read(&cs->mstate) != MS_LOCKED) { |
434 | warn("can't write to unlocked device"); | |
435 | retval = -EBUSY; | |
69049cc8 | 436 | } else if (!cs->connected) { |
784d5858 | 437 | gig_dbg(DEBUG_ANY, "can't write to unplugged device"); |
ee8a4b7f HL |
438 | retval = -EBUSY; //FIXME |
439 | } else | |
440 | retval = cs->ops->chars_in_buffer(cs); | |
441 | ||
abfd1dc7 | 442 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
443 | |
444 | return retval; | |
445 | } | |
446 | ||
447 | static void if_throttle(struct tty_struct *tty) | |
448 | { | |
449 | struct cardstate *cs; | |
450 | ||
451 | cs = (struct cardstate *) tty->driver_data; | |
452 | if (!cs) { | |
784d5858 | 453 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
454 | return; |
455 | } | |
456 | ||
784d5858 | 457 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 458 | |
abfd1dc7 | 459 | mutex_lock(&cs->mutex); |
ee8a4b7f HL |
460 | |
461 | if (!cs->open_count) | |
784d5858 | 462 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
463 | else { |
464 | //FIXME | |
465 | } | |
466 | ||
abfd1dc7 | 467 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
468 | } |
469 | ||
470 | static void if_unthrottle(struct tty_struct *tty) | |
471 | { | |
472 | struct cardstate *cs; | |
473 | ||
474 | cs = (struct cardstate *) tty->driver_data; | |
475 | if (!cs) { | |
784d5858 | 476 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
477 | return; |
478 | } | |
479 | ||
784d5858 | 480 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 481 | |
abfd1dc7 | 482 | mutex_lock(&cs->mutex); |
ee8a4b7f HL |
483 | |
484 | if (!cs->open_count) | |
784d5858 | 485 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
486 | else { |
487 | //FIXME | |
488 | } | |
489 | ||
abfd1dc7 | 490 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
491 | } |
492 | ||
493 | static void if_set_termios(struct tty_struct *tty, struct termios *old) | |
494 | { | |
495 | struct cardstate *cs; | |
496 | unsigned int iflag; | |
497 | unsigned int cflag; | |
498 | unsigned int old_cflag; | |
499 | unsigned int control_state, new_state; | |
500 | ||
501 | cs = (struct cardstate *) tty->driver_data; | |
502 | if (!cs) { | |
784d5858 | 503 | err("cs==NULL in %s", __func__); |
ee8a4b7f HL |
504 | return; |
505 | } | |
506 | ||
784d5858 | 507 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 508 | |
abfd1dc7 | 509 | mutex_lock(&cs->mutex); |
ee8a4b7f HL |
510 | |
511 | if (!cs->open_count) { | |
784d5858 | 512 | warn("%s: device not opened", __func__); |
ee8a4b7f HL |
513 | goto out; |
514 | } | |
515 | ||
69049cc8 | 516 | if (!cs->connected) { |
784d5858 | 517 | gig_dbg(DEBUG_ANY, "can't communicate with unplugged device"); |
ee8a4b7f HL |
518 | goto out; |
519 | } | |
520 | ||
521 | // stolen from mct_u232.c | |
522 | iflag = tty->termios->c_iflag; | |
523 | cflag = tty->termios->c_cflag; | |
524 | old_cflag = old ? old->c_cflag : cflag; //FIXME? | |
784d5858 TS |
525 | gig_dbg(DEBUG_IF, "%u: iflag %x cflag %x old %x", |
526 | cs->minor_index, iflag, cflag, old_cflag); | |
ee8a4b7f HL |
527 | |
528 | /* get a local copy of the current port settings */ | |
529 | control_state = cs->control_state; | |
530 | ||
531 | /* | |
532 | * Update baud rate. | |
533 | * Do not attempt to cache old rates and skip settings, | |
534 | * disconnects screw such tricks up completely. | |
535 | * Premature optimization is the root of all evil. | |
536 | */ | |
537 | ||
784d5858 | 538 | /* reassert DTR and (maybe) RTS on transition from B0 */ |
ee8a4b7f HL |
539 | if ((old_cflag & CBAUD) == B0) { |
540 | new_state = control_state | TIOCM_DTR; | |
541 | /* don't set RTS if using hardware flow control */ | |
542 | if (!(old_cflag & CRTSCTS)) | |
543 | new_state |= TIOCM_RTS; | |
784d5858 TS |
544 | gig_dbg(DEBUG_IF, "%u: from B0 - set DTR%s", |
545 | cs->minor_index, | |
546 | (new_state & TIOCM_RTS) ? " only" : "/RTS"); | |
ee8a4b7f HL |
547 | cs->ops->set_modem_ctrl(cs, control_state, new_state); |
548 | control_state = new_state; | |
549 | } | |
550 | ||
551 | cs->ops->baud_rate(cs, cflag & CBAUD); | |
552 | ||
553 | if ((cflag & CBAUD) == B0) { | |
554 | /* Drop RTS and DTR */ | |
784d5858 | 555 | gig_dbg(DEBUG_IF, "%u: to B0 - drop DTR/RTS", cs->minor_index); |
ee8a4b7f HL |
556 | new_state = control_state & ~(TIOCM_DTR | TIOCM_RTS); |
557 | cs->ops->set_modem_ctrl(cs, control_state, new_state); | |
558 | control_state = new_state; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Update line control register (LCR) | |
563 | */ | |
564 | ||
565 | cs->ops->set_line_ctrl(cs, cflag); | |
566 | ||
567 | #if 0 | |
568 | //FIXME this hangs M101 [ts 2005-03-09] | |
569 | //FIXME do we need this? | |
570 | /* | |
571 | * Set flow control: well, I do not really now how to handle DTR/RTS. | |
572 | * Just do what we have seen with SniffUSB on Win98. | |
573 | */ | |
574 | /* Drop DTR/RTS if no flow control otherwise assert */ | |
784d5858 TS |
575 | gig_dbg(DEBUG_IF, "%u: control_state %x", |
576 | cs->minor_index, control_state); | |
ee8a4b7f HL |
577 | new_state = control_state; |
578 | if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) | |
579 | new_state |= TIOCM_DTR | TIOCM_RTS; | |
580 | else | |
581 | new_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
582 | if (new_state != control_state) { | |
784d5858 TS |
583 | gig_dbg(DEBUG_IF, "%u: new_state %x", |
584 | cs->minor_index, new_state); | |
917f5085 | 585 | gigaset_set_modem_ctrl(cs, control_state, new_state); |
ee8a4b7f HL |
586 | control_state = new_state; |
587 | } | |
588 | #endif | |
589 | ||
590 | /* save off the modified port settings */ | |
591 | cs->control_state = control_state; | |
592 | ||
593 | out: | |
abfd1dc7 | 594 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
595 | } |
596 | ||
597 | ||
598 | /* wakeup tasklet for the write operation */ | |
599 | static void if_wake(unsigned long data) | |
600 | { | |
601 | struct cardstate *cs = (struct cardstate *) data; | |
602 | struct tty_struct *tty; | |
603 | ||
604 | tty = cs->tty; | |
605 | if (!tty) | |
606 | return; | |
607 | ||
608 | if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && | |
609 | tty->ldisc.write_wakeup) { | |
784d5858 | 610 | gig_dbg(DEBUG_IF, "write wakeup call"); |
ee8a4b7f HL |
611 | tty->ldisc.write_wakeup(tty); |
612 | } | |
613 | ||
614 | wake_up_interruptible(&tty->write_wait); | |
615 | } | |
616 | ||
617 | /*** interface to common ***/ | |
618 | ||
619 | void gigaset_if_init(struct cardstate *cs) | |
620 | { | |
621 | struct gigaset_driver *drv; | |
622 | ||
623 | drv = cs->driver; | |
624 | if (!drv->have_tty) | |
625 | return; | |
626 | ||
627 | tasklet_init(&cs->if_wake_tasklet, &if_wake, (unsigned long) cs); | |
01107d34 | 628 | cs->tty_dev = tty_register_device(drv->tty, cs->minor_index, NULL); |
3dda4e37 | 629 | |
01107d34 GKH |
630 | if (!IS_ERR(cs->tty_dev)) |
631 | dev_set_drvdata(cs->tty_dev, cs); | |
3dda4e37 HL |
632 | else { |
633 | warn("could not register device to the tty subsystem"); | |
01107d34 | 634 | cs->tty_dev = NULL; |
3dda4e37 | 635 | } |
ee8a4b7f HL |
636 | } |
637 | ||
638 | void gigaset_if_free(struct cardstate *cs) | |
639 | { | |
640 | struct gigaset_driver *drv; | |
641 | ||
642 | drv = cs->driver; | |
643 | if (!drv->have_tty) | |
644 | return; | |
645 | ||
646 | tasklet_disable(&cs->if_wake_tasklet); | |
647 | tasklet_kill(&cs->if_wake_tasklet); | |
01107d34 | 648 | cs->tty_dev = NULL; |
ee8a4b7f HL |
649 | tty_unregister_device(drv->tty, cs->minor_index); |
650 | } | |
651 | ||
652 | void gigaset_if_receive(struct cardstate *cs, | |
784d5858 | 653 | unsigned char *buffer, size_t len) |
ee8a4b7f HL |
654 | { |
655 | unsigned long flags; | |
656 | struct tty_struct *tty; | |
657 | ||
658 | spin_lock_irqsave(&cs->lock, flags); | |
659 | if ((tty = cs->tty) == NULL) | |
784d5858 | 660 | gig_dbg(DEBUG_ANY, "receive on closed device"); |
ee8a4b7f HL |
661 | else { |
662 | tty_buffer_request_room(tty, len); | |
663 | tty_insert_flip_string(tty, buffer, len); | |
664 | tty_flip_buffer_push(tty); | |
665 | } | |
666 | spin_unlock_irqrestore(&cs->lock, flags); | |
667 | } | |
668 | EXPORT_SYMBOL_GPL(gigaset_if_receive); | |
669 | ||
670 | /* gigaset_if_initdriver | |
671 | * Initialize tty interface. | |
672 | * parameters: | |
784d5858 TS |
673 | * drv Driver |
674 | * procname Name of the driver (e.g. for /proc/tty/drivers) | |
675 | * devname Name of the device files (prefix without minor number) | |
ee8a4b7f HL |
676 | */ |
677 | void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname, | |
f4eaa370 | 678 | const char *devname) |
ee8a4b7f HL |
679 | { |
680 | unsigned minors = drv->minors; | |
681 | int ret; | |
682 | struct tty_driver *tty; | |
683 | ||
684 | drv->have_tty = 0; | |
685 | ||
686 | if ((drv->tty = alloc_tty_driver(minors)) == NULL) | |
687 | goto enomem; | |
688 | tty = drv->tty; | |
689 | ||
690 | tty->magic = TTY_DRIVER_MAGIC, | |
691 | tty->major = GIG_MAJOR, | |
692 | tty->type = TTY_DRIVER_TYPE_SERIAL, | |
693 | tty->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 694 | tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
ee8a4b7f HL |
695 | |
696 | tty->driver_name = procname; | |
697 | tty->name = devname; | |
698 | tty->minor_start = drv->minor; | |
699 | tty->num = drv->minors; | |
700 | ||
701 | tty->owner = THIS_MODULE; | |
ee8a4b7f HL |
702 | |
703 | tty->init_termios = tty_std_termios; //FIXME | |
704 | tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; //FIXME | |
705 | tty_set_operations(tty, &if_ops); | |
706 | ||
707 | ret = tty_register_driver(tty); | |
708 | if (ret < 0) { | |
709 | warn("failed to register tty driver (error %d)", ret); | |
710 | goto error; | |
711 | } | |
784d5858 | 712 | gig_dbg(DEBUG_IF, "tty driver initialized"); |
ee8a4b7f HL |
713 | drv->have_tty = 1; |
714 | return; | |
715 | ||
716 | enomem: | |
717 | warn("could not allocate tty structures"); | |
718 | error: | |
719 | if (drv->tty) | |
720 | put_tty_driver(drv->tty); | |
721 | } | |
722 | ||
723 | void gigaset_if_freedriver(struct gigaset_driver *drv) | |
724 | { | |
725 | if (!drv->have_tty) | |
726 | return; | |
727 | ||
728 | drv->have_tty = 0; | |
729 | tty_unregister_driver(drv->tty); | |
730 | put_tty_driver(drv->tty); | |
731 | } |