Commit | Line | Data |
---|---|---|
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) { | |
9d4bee2b | 31 | *arg = cs->mstate == MS_LOCKED; |
ee8a4b7f HL |
32 | return 0; |
33 | } | |
34 | ||
9d4bee2b | 35 | if (!cmd && cs->mstate == MS_LOCKED && cs->connected) { |
ee8a4b7f HL |
36 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); |
37 | cs->ops->baud_rate(cs, B115200); | |
38 | cs->ops->set_line_ctrl(cs, CS8); | |
39 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
40 | } | |
41 | ||
42 | cs->waiting = 1; | |
43 | if (!gigaset_add_event(cs, &cs->at_state, EV_IF_LOCK, | |
784d5858 | 44 | NULL, cmd, NULL)) { |
ee8a4b7f HL |
45 | cs->waiting = 0; |
46 | return -ENOMEM; | |
47 | } | |
48 | ||
784d5858 | 49 | gig_dbg(DEBUG_CMD, "scheduling IF_LOCK"); |
ee8a4b7f HL |
50 | gigaset_schedule_event(cs); |
51 | ||
52 | wait_event(cs->waitqueue, !cs->waiting); | |
53 | ||
54 | if (cs->cmd_result >= 0) { | |
55 | *arg = cs->cmd_result; | |
56 | return 0; | |
57 | } | |
58 | ||
59 | return cs->cmd_result; | |
60 | } | |
61 | ||
62 | static int if_version(struct cardstate *cs, unsigned arg[4]) | |
63 | { | |
64 | static const unsigned version[4] = GIG_VERSION; | |
65 | static const unsigned compat[4] = GIG_COMPAT; | |
66 | unsigned cmd = arg[0]; | |
67 | ||
784d5858 | 68 | gig_dbg(DEBUG_IF, "%u: if_version (%d)", cs->minor_index, cmd); |
ee8a4b7f HL |
69 | |
70 | switch (cmd) { | |
71 | case GIGVER_DRIVER: | |
72 | memcpy(arg, version, sizeof version); | |
73 | return 0; | |
74 | case GIGVER_COMPAT: | |
75 | memcpy(arg, compat, sizeof compat); | |
76 | return 0; | |
77 | case GIGVER_FWBASE: | |
78 | cs->waiting = 1; | |
79 | if (!gigaset_add_event(cs, &cs->at_state, EV_IF_VER, | |
784d5858 | 80 | NULL, 0, arg)) { |
ee8a4b7f HL |
81 | cs->waiting = 0; |
82 | return -ENOMEM; | |
83 | } | |
84 | ||
784d5858 | 85 | gig_dbg(DEBUG_CMD, "scheduling IF_VER"); |
ee8a4b7f HL |
86 | gigaset_schedule_event(cs); |
87 | ||
88 | wait_event(cs->waitqueue, !cs->waiting); | |
89 | ||
90 | if (cs->cmd_result >= 0) | |
91 | return 0; | |
92 | ||
93 | return cs->cmd_result; | |
94 | default: | |
95 | return -EINVAL; | |
96 | } | |
97 | } | |
98 | ||
99 | static int if_config(struct cardstate *cs, int *arg) | |
100 | { | |
784d5858 | 101 | gig_dbg(DEBUG_IF, "%u: if_config (%d)", cs->minor_index, *arg); |
ee8a4b7f HL |
102 | |
103 | if (*arg != 1) | |
104 | return -EINVAL; | |
105 | ||
9d4bee2b | 106 | if (cs->mstate != MS_LOCKED) |
ee8a4b7f HL |
107 | return -EBUSY; |
108 | ||
69049cc8 | 109 | if (!cs->connected) { |
c8770dca | 110 | pr_err("%s: not connected\n", __func__); |
69049cc8 TS |
111 | return -ENODEV; |
112 | } | |
113 | ||
ee8a4b7f HL |
114 | *arg = 0; |
115 | return gigaset_enterconfigmode(cs); | |
116 | } | |
117 | ||
118 | /*** the terminal driver ***/ | |
119 | /* stolen from usbserial and some other tty drivers */ | |
120 | ||
121 | static int if_open(struct tty_struct *tty, struct file *filp); | |
122 | static void if_close(struct tty_struct *tty, struct file *filp); | |
123 | static int if_ioctl(struct tty_struct *tty, struct file *file, | |
784d5858 | 124 | unsigned int cmd, unsigned long arg); |
ee8a4b7f HL |
125 | static int if_write_room(struct tty_struct *tty); |
126 | static int if_chars_in_buffer(struct tty_struct *tty); | |
127 | static void if_throttle(struct tty_struct *tty); | |
128 | static void if_unthrottle(struct tty_struct *tty); | |
606d099c | 129 | static void if_set_termios(struct tty_struct *tty, struct ktermios *old); |
ee8a4b7f HL |
130 | static int if_tiocmget(struct tty_struct *tty, struct file *file); |
131 | static int if_tiocmset(struct tty_struct *tty, struct file *file, | |
784d5858 | 132 | unsigned int set, unsigned int clear); |
ee8a4b7f | 133 | static int if_write(struct tty_struct *tty, |
784d5858 | 134 | const unsigned char *buf, int count); |
ee8a4b7f | 135 | |
b68e31d0 | 136 | static const struct tty_operations if_ops = { |
ee8a4b7f HL |
137 | .open = if_open, |
138 | .close = if_close, | |
139 | .ioctl = if_ioctl, | |
140 | .write = if_write, | |
141 | .write_room = if_write_room, | |
142 | .chars_in_buffer = if_chars_in_buffer, | |
143 | .set_termios = if_set_termios, | |
144 | .throttle = if_throttle, | |
145 | .unthrottle = if_unthrottle, | |
ee8a4b7f HL |
146 | .tiocmget = if_tiocmget, |
147 | .tiocmset = if_tiocmset, | |
148 | }; | |
149 | ||
150 | static int if_open(struct tty_struct *tty, struct file *filp) | |
151 | { | |
152 | struct cardstate *cs; | |
153 | unsigned long flags; | |
154 | ||
784d5858 TS |
155 | gig_dbg(DEBUG_IF, "%d+%d: %s()", |
156 | tty->driver->minor_start, tty->index, __func__); | |
ee8a4b7f HL |
157 | |
158 | tty->driver_data = NULL; | |
159 | ||
160 | cs = gigaset_get_cs_by_tty(tty); | |
e468c048 | 161 | if (!cs || !try_module_get(cs->driver->owner)) |
ee8a4b7f HL |
162 | return -ENODEV; |
163 | ||
abfd1dc7 | 164 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
165 | return -ERESTARTSYS; // FIXME -EINTR? |
166 | tty->driver_data = cs; | |
167 | ||
168 | ++cs->open_count; | |
169 | ||
170 | if (cs->open_count == 1) { | |
171 | spin_lock_irqsave(&cs->lock, flags); | |
172 | cs->tty = tty; | |
173 | spin_unlock_irqrestore(&cs->lock, flags); | |
174 | tty->low_latency = 1; //FIXME test | |
ee8a4b7f HL |
175 | } |
176 | ||
abfd1dc7 | 177 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
178 | return 0; |
179 | } | |
180 | ||
181 | static void if_close(struct tty_struct *tty, struct file *filp) | |
182 | { | |
183 | struct cardstate *cs; | |
184 | unsigned long flags; | |
185 | ||
186 | cs = (struct cardstate *) tty->driver_data; | |
187 | if (!cs) { | |
c8770dca | 188 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
189 | return; |
190 | } | |
191 | ||
784d5858 | 192 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 193 | |
abfd1dc7 | 194 | mutex_lock(&cs->mutex); |
ee8a4b7f | 195 | |
51370e5b TS |
196 | if (!cs->connected) |
197 | gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */ | |
198 | else if (!cs->open_count) | |
5002779d | 199 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
ee8a4b7f HL |
200 | else { |
201 | if (!--cs->open_count) { | |
202 | spin_lock_irqsave(&cs->lock, flags); | |
203 | cs->tty = NULL; | |
204 | spin_unlock_irqrestore(&cs->lock, flags); | |
ee8a4b7f HL |
205 | } |
206 | } | |
207 | ||
abfd1dc7 | 208 | mutex_unlock(&cs->mutex); |
e468c048 TS |
209 | |
210 | module_put(cs->driver->owner); | |
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) { | |
c8770dca | 224 | pr_err("%s: no cardstate\n", __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 | ||
51370e5b TS |
233 | if (!cs->connected) { |
234 | gig_dbg(DEBUG_IF, "not connected"); | |
235 | retval = -ENODEV; | |
236 | } else if (!cs->open_count) | |
5002779d | 237 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
ee8a4b7f HL |
238 | else { |
239 | retval = 0; | |
240 | switch (cmd) { | |
241 | case GIGASET_REDIR: | |
242 | retval = get_user(int_arg, (int __user *) arg); | |
243 | if (retval >= 0) | |
244 | retval = if_lock(cs, &int_arg); | |
245 | if (retval >= 0) | |
246 | retval = put_user(int_arg, (int __user *) arg); | |
247 | break; | |
248 | case GIGASET_CONFIG: | |
249 | retval = get_user(int_arg, (int __user *) arg); | |
250 | if (retval >= 0) | |
251 | retval = if_config(cs, &int_arg); | |
252 | if (retval >= 0) | |
253 | retval = put_user(int_arg, (int __user *) arg); | |
254 | break; | |
255 | case GIGASET_BRKCHARS: | |
ee8a4b7f | 256 | retval = copy_from_user(&buf, |
784d5858 TS |
257 | (const unsigned char __user *) arg, 6) |
258 | ? -EFAULT : 0; | |
01371500 TS |
259 | if (retval >= 0) { |
260 | gigaset_dbg_buffer(DEBUG_IF, "GIGASET_BRKCHARS", | |
261 | 6, (const unsigned char *) arg); | |
ee8a4b7f | 262 | retval = cs->ops->brkchars(cs, buf); |
01371500 | 263 | } |
ee8a4b7f HL |
264 | break; |
265 | case GIGASET_VERSION: | |
917f5085 | 266 | retval = copy_from_user(version, |
784d5858 TS |
267 | (unsigned __user *) arg, sizeof version) |
268 | ? -EFAULT : 0; | |
ee8a4b7f HL |
269 | if (retval >= 0) |
270 | retval = if_version(cs, version); | |
271 | if (retval >= 0) | |
917f5085 | 272 | retval = copy_to_user((unsigned __user *) arg, |
784d5858 TS |
273 | version, sizeof version) |
274 | ? -EFAULT : 0; | |
ee8a4b7f | 275 | break; |
784d5858 TS |
276 | default: |
277 | gig_dbg(DEBUG_ANY, "%s: arg not supported - 0x%04x", | |
278 | __func__, cmd); | |
ee8a4b7f HL |
279 | retval = -ENOIOCTLCMD; |
280 | } | |
281 | } | |
282 | ||
abfd1dc7 | 283 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
284 | |
285 | return retval; | |
286 | } | |
287 | ||
288 | static int if_tiocmget(struct tty_struct *tty, struct file *file) | |
289 | { | |
290 | struct cardstate *cs; | |
291 | int retval; | |
292 | ||
293 | cs = (struct cardstate *) tty->driver_data; | |
294 | if (!cs) { | |
c8770dca | 295 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
296 | return -ENODEV; |
297 | } | |
298 | ||
784d5858 | 299 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 300 | |
abfd1dc7 | 301 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
302 | return -ERESTARTSYS; // FIXME -EINTR? |
303 | ||
304 | // FIXME read from device? | |
305 | retval = cs->control_state & (TIOCM_RTS|TIOCM_DTR); | |
306 | ||
abfd1dc7 | 307 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
308 | |
309 | return retval; | |
310 | } | |
311 | ||
312 | static int if_tiocmset(struct tty_struct *tty, struct file *file, | |
784d5858 | 313 | unsigned int set, unsigned int clear) |
ee8a4b7f HL |
314 | { |
315 | struct cardstate *cs; | |
316 | int retval; | |
317 | unsigned mc; | |
318 | ||
319 | cs = (struct cardstate *) tty->driver_data; | |
320 | if (!cs) { | |
c8770dca | 321 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
322 | return -ENODEV; |
323 | } | |
324 | ||
784d5858 TS |
325 | gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)", |
326 | cs->minor_index, __func__, set, clear); | |
ee8a4b7f | 327 | |
abfd1dc7 | 328 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
329 | return -ERESTARTSYS; // FIXME -EINTR? |
330 | ||
69049cc8 | 331 | if (!cs->connected) { |
51370e5b | 332 | gig_dbg(DEBUG_IF, "not connected"); |
ee8a4b7f HL |
333 | retval = -ENODEV; |
334 | } else { | |
335 | mc = (cs->control_state | set) & ~clear & (TIOCM_RTS|TIOCM_DTR); | |
336 | retval = cs->ops->set_modem_ctrl(cs, cs->control_state, mc); | |
337 | cs->control_state = mc; | |
338 | } | |
339 | ||
abfd1dc7 | 340 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
341 | |
342 | return retval; | |
343 | } | |
344 | ||
345 | static int if_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
346 | { | |
347 | struct cardstate *cs; | |
348 | int retval = -ENODEV; | |
349 | ||
350 | cs = (struct cardstate *) tty->driver_data; | |
351 | if (!cs) { | |
c8770dca | 352 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
353 | return -ENODEV; |
354 | } | |
355 | ||
784d5858 | 356 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 357 | |
abfd1dc7 | 358 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
359 | return -ERESTARTSYS; // FIXME -EINTR? |
360 | ||
51370e5b TS |
361 | if (!cs->connected) { |
362 | gig_dbg(DEBUG_IF, "not connected"); | |
363 | retval = -ENODEV; | |
364 | } else if (!cs->open_count) | |
5002779d | 365 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
9d4bee2b | 366 | else if (cs->mstate != MS_LOCKED) { |
5002779d | 367 | dev_warn(cs->dev, "can't write to unlocked device\n"); |
ee8a4b7f | 368 | retval = -EBUSY; |
ee8a4b7f HL |
369 | } else { |
370 | retval = cs->ops->write_cmd(cs, buf, count, | |
784d5858 | 371 | &cs->if_wake_tasklet); |
ee8a4b7f HL |
372 | } |
373 | ||
abfd1dc7 | 374 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
375 | |
376 | return retval; | |
377 | } | |
378 | ||
379 | static int if_write_room(struct tty_struct *tty) | |
380 | { | |
381 | struct cardstate *cs; | |
382 | int retval = -ENODEV; | |
383 | ||
384 | cs = (struct cardstate *) tty->driver_data; | |
385 | if (!cs) { | |
c8770dca | 386 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
387 | return -ENODEV; |
388 | } | |
389 | ||
784d5858 | 390 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 391 | |
abfd1dc7 | 392 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
393 | return -ERESTARTSYS; // FIXME -EINTR? |
394 | ||
51370e5b TS |
395 | if (!cs->connected) { |
396 | gig_dbg(DEBUG_IF, "not connected"); | |
397 | retval = -ENODEV; | |
398 | } else if (!cs->open_count) | |
5002779d | 399 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
9d4bee2b | 400 | else if (cs->mstate != MS_LOCKED) { |
5002779d | 401 | dev_warn(cs->dev, "can't write to unlocked device\n"); |
9d4bee2b | 402 | retval = -EBUSY; |
ee8a4b7f HL |
403 | } else |
404 | retval = cs->ops->write_room(cs); | |
405 | ||
abfd1dc7 | 406 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
407 | |
408 | return retval; | |
409 | } | |
410 | ||
411 | static int if_chars_in_buffer(struct tty_struct *tty) | |
412 | { | |
413 | struct cardstate *cs; | |
414 | int retval = -ENODEV; | |
415 | ||
416 | cs = (struct cardstate *) tty->driver_data; | |
417 | if (!cs) { | |
c8770dca | 418 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
419 | return -ENODEV; |
420 | } | |
421 | ||
784d5858 | 422 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 423 | |
abfd1dc7 | 424 | if (mutex_lock_interruptible(&cs->mutex)) |
ee8a4b7f HL |
425 | return -ERESTARTSYS; // FIXME -EINTR? |
426 | ||
51370e5b TS |
427 | if (!cs->connected) { |
428 | gig_dbg(DEBUG_IF, "not connected"); | |
429 | retval = -ENODEV; | |
430 | } else if (!cs->open_count) | |
5002779d | 431 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
9d4bee2b | 432 | else if (cs->mstate != MS_LOCKED) { |
5002779d | 433 | dev_warn(cs->dev, "can't write to unlocked device\n"); |
ee8a4b7f | 434 | retval = -EBUSY; |
ee8a4b7f HL |
435 | } else |
436 | retval = cs->ops->chars_in_buffer(cs); | |
437 | ||
abfd1dc7 | 438 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
439 | |
440 | return retval; | |
441 | } | |
442 | ||
443 | static void if_throttle(struct tty_struct *tty) | |
444 | { | |
445 | struct cardstate *cs; | |
446 | ||
447 | cs = (struct cardstate *) tty->driver_data; | |
448 | if (!cs) { | |
c8770dca | 449 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
450 | return; |
451 | } | |
452 | ||
784d5858 | 453 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 454 | |
abfd1dc7 | 455 | mutex_lock(&cs->mutex); |
ee8a4b7f | 456 | |
51370e5b TS |
457 | if (!cs->connected) |
458 | gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */ | |
459 | else if (!cs->open_count) | |
5002779d | 460 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
ee8a4b7f HL |
461 | else { |
462 | //FIXME | |
463 | } | |
464 | ||
abfd1dc7 | 465 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
466 | } |
467 | ||
468 | static void if_unthrottle(struct tty_struct *tty) | |
469 | { | |
470 | struct cardstate *cs; | |
471 | ||
472 | cs = (struct cardstate *) tty->driver_data; | |
473 | if (!cs) { | |
c8770dca | 474 | pr_err("%s: no cardstate\n", __func__); |
ee8a4b7f HL |
475 | return; |
476 | } | |
477 | ||
784d5858 | 478 | gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); |
ee8a4b7f | 479 | |
abfd1dc7 | 480 | mutex_lock(&cs->mutex); |
ee8a4b7f | 481 | |
51370e5b TS |
482 | if (!cs->connected) |
483 | gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */ | |
484 | else if (!cs->open_count) | |
5002779d | 485 | dev_warn(cs->dev, "%s: device not opened\n", __func__); |
ee8a4b7f HL |
486 | else { |
487 | //FIXME | |
488 | } | |
489 | ||
abfd1dc7 | 490 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
491 | } |
492 | ||
606d099c | 493 | static void if_set_termios(struct tty_struct *tty, struct ktermios *old) |
ee8a4b7f HL |
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) { | |
c8770dca | 503 | pr_err("%s: no cardstate\n", __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 | 510 | |
51370e5b TS |
511 | if (!cs->connected) { |
512 | gig_dbg(DEBUG_IF, "not connected"); | |
ee8a4b7f HL |
513 | goto out; |
514 | } | |
515 | ||
51370e5b TS |
516 | if (!cs->open_count) { |
517 | dev_warn(cs->dev, "%s: device not opened\n", __func__); | |
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 | ||
ee8a4b7f HL |
567 | /* save off the modified port settings */ |
568 | cs->control_state = control_state; | |
569 | ||
570 | out: | |
abfd1dc7 | 571 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
572 | } |
573 | ||
574 | ||
575 | /* wakeup tasklet for the write operation */ | |
576 | static void if_wake(unsigned long data) | |
577 | { | |
578 | struct cardstate *cs = (struct cardstate *) data; | |
ee8a4b7f | 579 | |
b963a844 JS |
580 | if (cs->tty) |
581 | tty_wakeup(cs->tty); | |
ee8a4b7f HL |
582 | } |
583 | ||
584 | /*** interface to common ***/ | |
585 | ||
586 | void gigaset_if_init(struct cardstate *cs) | |
587 | { | |
588 | struct gigaset_driver *drv; | |
589 | ||
590 | drv = cs->driver; | |
591 | if (!drv->have_tty) | |
592 | return; | |
593 | ||
594 | tasklet_init(&cs->if_wake_tasklet, &if_wake, (unsigned long) cs); | |
7435f50e TS |
595 | |
596 | mutex_lock(&cs->mutex); | |
01107d34 | 597 | cs->tty_dev = tty_register_device(drv->tty, cs->minor_index, NULL); |
3dda4e37 | 598 | |
01107d34 GKH |
599 | if (!IS_ERR(cs->tty_dev)) |
600 | dev_set_drvdata(cs->tty_dev, cs); | |
3dda4e37 | 601 | else { |
42e3d611 | 602 | pr_warning("could not register device to the tty subsystem\n"); |
01107d34 | 603 | cs->tty_dev = NULL; |
3dda4e37 | 604 | } |
7435f50e | 605 | mutex_unlock(&cs->mutex); |
ee8a4b7f HL |
606 | } |
607 | ||
608 | void gigaset_if_free(struct cardstate *cs) | |
609 | { | |
610 | struct gigaset_driver *drv; | |
611 | ||
612 | drv = cs->driver; | |
613 | if (!drv->have_tty) | |
614 | return; | |
615 | ||
616 | tasklet_disable(&cs->if_wake_tasklet); | |
617 | tasklet_kill(&cs->if_wake_tasklet); | |
01107d34 | 618 | cs->tty_dev = NULL; |
ee8a4b7f HL |
619 | tty_unregister_device(drv->tty, cs->minor_index); |
620 | } | |
621 | ||
622 | void gigaset_if_receive(struct cardstate *cs, | |
784d5858 | 623 | unsigned char *buffer, size_t len) |
ee8a4b7f HL |
624 | { |
625 | unsigned long flags; | |
626 | struct tty_struct *tty; | |
627 | ||
628 | spin_lock_irqsave(&cs->lock, flags); | |
629 | if ((tty = cs->tty) == NULL) | |
784d5858 | 630 | gig_dbg(DEBUG_ANY, "receive on closed device"); |
ee8a4b7f HL |
631 | else { |
632 | tty_buffer_request_room(tty, len); | |
633 | tty_insert_flip_string(tty, buffer, len); | |
634 | tty_flip_buffer_push(tty); | |
635 | } | |
636 | spin_unlock_irqrestore(&cs->lock, flags); | |
637 | } | |
638 | EXPORT_SYMBOL_GPL(gigaset_if_receive); | |
639 | ||
640 | /* gigaset_if_initdriver | |
641 | * Initialize tty interface. | |
642 | * parameters: | |
784d5858 TS |
643 | * drv Driver |
644 | * procname Name of the driver (e.g. for /proc/tty/drivers) | |
645 | * devname Name of the device files (prefix without minor number) | |
ee8a4b7f HL |
646 | */ |
647 | void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname, | |
f4eaa370 | 648 | const char *devname) |
ee8a4b7f HL |
649 | { |
650 | unsigned minors = drv->minors; | |
651 | int ret; | |
652 | struct tty_driver *tty; | |
653 | ||
654 | drv->have_tty = 0; | |
655 | ||
656 | if ((drv->tty = alloc_tty_driver(minors)) == NULL) | |
657 | goto enomem; | |
658 | tty = drv->tty; | |
659 | ||
660 | tty->magic = TTY_DRIVER_MAGIC, | |
661 | tty->major = GIG_MAJOR, | |
662 | tty->type = TTY_DRIVER_TYPE_SERIAL, | |
663 | tty->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 664 | tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
ee8a4b7f HL |
665 | |
666 | tty->driver_name = procname; | |
667 | tty->name = devname; | |
668 | tty->minor_start = drv->minor; | |
669 | tty->num = drv->minors; | |
670 | ||
671 | tty->owner = THIS_MODULE; | |
ee8a4b7f HL |
672 | |
673 | tty->init_termios = tty_std_termios; //FIXME | |
674 | tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; //FIXME | |
675 | tty_set_operations(tty, &if_ops); | |
676 | ||
677 | ret = tty_register_driver(tty); | |
678 | if (ret < 0) { | |
c8770dca | 679 | pr_err("error %d registering tty driver\n", ret); |
ee8a4b7f HL |
680 | goto error; |
681 | } | |
784d5858 | 682 | gig_dbg(DEBUG_IF, "tty driver initialized"); |
ee8a4b7f HL |
683 | drv->have_tty = 1; |
684 | return; | |
685 | ||
686 | enomem: | |
c8770dca | 687 | pr_err("out of memory\n"); |
ee8a4b7f HL |
688 | error: |
689 | if (drv->tty) | |
690 | put_tty_driver(drv->tty); | |
691 | } | |
692 | ||
693 | void gigaset_if_freedriver(struct gigaset_driver *drv) | |
694 | { | |
695 | if (!drv->have_tty) | |
696 | return; | |
697 | ||
698 | drv->have_tty = 0; | |
699 | tty_unregister_driver(drv->tty); | |
700 | put_tty_driver(drv->tty); | |
701 | } |