Commit | Line | Data |
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099dc4fb DS |
1 | /* |
2 | * IPWireless 3G PCMCIA Network Driver | |
3 | * | |
4 | * Original code | |
5 | * by Stephen Blackheath <stephen@blacksapphire.com>, | |
6 | * Ben Martel <benm@symmetric.co.nz> | |
7 | * | |
8 | * Copyrighted as follows: | |
9 | * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) | |
10 | * | |
11 | * Various driver changes and rewrites, port to new kernels | |
12 | * Copyright (C) 2006-2007 Jiri Kosina | |
13 | * | |
14 | * Misc code cleanups and updates | |
15 | * Copyright (C) 2007 David Sterba | |
16 | */ | |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/ppp_defs.h> | |
23 | #include <linux/if.h> | |
24 | #include <linux/if_ppp.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/serial.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/tty.h> | |
29 | #include <linux/tty_driver.h> | |
30 | #include <linux/tty_flip.h> | |
31 | #include <linux/uaccess.h> | |
32 | #include <linux/version.h> | |
33 | ||
34 | #include "tty.h" | |
35 | #include "network.h" | |
36 | #include "hardware.h" | |
37 | #include "main.h" | |
38 | ||
39 | #define IPWIRELESS_PCMCIA_START (0) | |
40 | #define IPWIRELESS_PCMCIA_MINORS (24) | |
41 | #define IPWIRELESS_PCMCIA_MINOR_RANGE (8) | |
42 | ||
43 | #define TTYTYPE_MODEM (0) | |
44 | #define TTYTYPE_MONITOR (1) | |
45 | #define TTYTYPE_RAS_RAW (2) | |
46 | ||
47 | struct ipw_tty { | |
48 | int index; | |
49 | struct ipw_hardware *hardware; | |
50 | unsigned int channel_idx; | |
51 | unsigned int secondary_channel_idx; | |
52 | int tty_type; | |
53 | struct ipw_network *network; | |
54 | struct tty_struct *linux_tty; | |
55 | int open_count; | |
56 | unsigned int control_lines; | |
57 | struct mutex ipw_tty_mutex; | |
58 | int tx_bytes_queued; | |
59 | int closing; | |
60 | }; | |
61 | ||
62 | static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS]; | |
63 | ||
64 | static struct tty_driver *ipw_tty_driver; | |
65 | ||
66 | static char *tty_type_name(int tty_type) | |
67 | { | |
68 | static char *channel_names[] = { | |
69 | "modem", | |
70 | "monitor", | |
71 | "RAS-raw" | |
72 | }; | |
73 | ||
74 | return channel_names[tty_type]; | |
75 | } | |
76 | ||
77 | static void report_registering(struct ipw_tty *tty) | |
78 | { | |
79 | char *iftype = tty_type_name(tty->tty_type); | |
80 | ||
81 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
82 | ": registering %s device ttyIPWp%d\n", iftype, tty->index); | |
83 | } | |
84 | ||
85 | static void report_deregistering(struct ipw_tty *tty) | |
86 | { | |
87 | char *iftype = tty_type_name(tty->tty_type); | |
88 | ||
89 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
90 | ": deregistering %s device ttyIPWp%d\n", iftype, | |
91 | tty->index); | |
92 | } | |
93 | ||
94 | static struct ipw_tty *get_tty(int minor) | |
95 | { | |
96 | if (minor < ipw_tty_driver->minor_start | |
97 | || minor >= ipw_tty_driver->minor_start + | |
98 | IPWIRELESS_PCMCIA_MINORS) | |
99 | return NULL; | |
100 | else { | |
101 | int minor_offset = minor - ipw_tty_driver->minor_start; | |
102 | ||
103 | /* | |
104 | * The 'ras_raw' channel is only available when 'loopback' mode | |
105 | * is enabled. | |
106 | * Number of minor starts with 16 (_RANGE * _RAS_RAW). | |
107 | */ | |
108 | if (!ipwireless_loopback && | |
109 | minor_offset >= | |
110 | IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW) | |
111 | return NULL; | |
112 | ||
113 | return ttys[minor_offset]; | |
114 | } | |
115 | } | |
116 | ||
117 | static int ipw_open(struct tty_struct *linux_tty, struct file *filp) | |
118 | { | |
119 | int minor = linux_tty->index; | |
120 | struct ipw_tty *tty = get_tty(minor); | |
121 | ||
122 | if (!tty) | |
123 | return -ENODEV; | |
124 | ||
125 | mutex_lock(&tty->ipw_tty_mutex); | |
126 | ||
127 | if (tty->closing) { | |
128 | mutex_unlock(&tty->ipw_tty_mutex); | |
129 | return -ENODEV; | |
130 | } | |
131 | if (tty->open_count == 0) | |
132 | tty->tx_bytes_queued = 0; | |
133 | ||
134 | tty->open_count++; | |
135 | ||
136 | tty->linux_tty = linux_tty; | |
137 | linux_tty->driver_data = tty; | |
138 | linux_tty->low_latency = 1; | |
139 | ||
140 | if (tty->tty_type == TTYTYPE_MODEM) | |
141 | ipwireless_ppp_open(tty->network); | |
142 | ||
143 | mutex_unlock(&tty->ipw_tty_mutex); | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static void do_ipw_close(struct ipw_tty *tty) | |
149 | { | |
150 | tty->open_count--; | |
151 | ||
152 | if (tty->open_count == 0) { | |
153 | struct tty_struct *linux_tty = tty->linux_tty; | |
154 | ||
155 | if (linux_tty != NULL) { | |
156 | tty->linux_tty = NULL; | |
157 | linux_tty->driver_data = NULL; | |
158 | ||
159 | if (tty->tty_type == TTYTYPE_MODEM) | |
160 | ipwireless_ppp_close(tty->network); | |
161 | } | |
162 | } | |
163 | } | |
164 | ||
165 | static void ipw_hangup(struct tty_struct *linux_tty) | |
166 | { | |
167 | struct ipw_tty *tty = linux_tty->driver_data; | |
168 | ||
169 | if (!tty) | |
170 | return; | |
171 | ||
172 | mutex_lock(&tty->ipw_tty_mutex); | |
173 | if (tty->open_count == 0) { | |
174 | mutex_unlock(&tty->ipw_tty_mutex); | |
175 | return; | |
176 | } | |
177 | ||
178 | do_ipw_close(tty); | |
179 | ||
180 | mutex_unlock(&tty->ipw_tty_mutex); | |
181 | } | |
182 | ||
183 | static void ipw_close(struct tty_struct *linux_tty, struct file *filp) | |
184 | { | |
185 | ipw_hangup(linux_tty); | |
186 | } | |
187 | ||
188 | /* Take data received from hardware, and send it out the tty */ | |
189 | void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, | |
190 | unsigned int length) | |
191 | { | |
192 | struct tty_struct *linux_tty; | |
193 | int work = 0; | |
194 | ||
195 | mutex_lock(&tty->ipw_tty_mutex); | |
196 | linux_tty = tty->linux_tty; | |
197 | if (linux_tty == NULL) { | |
198 | mutex_unlock(&tty->ipw_tty_mutex); | |
199 | return; | |
200 | } | |
201 | ||
202 | if (!tty->open_count) { | |
203 | mutex_unlock(&tty->ipw_tty_mutex); | |
204 | return; | |
205 | } | |
206 | mutex_unlock(&tty->ipw_tty_mutex); | |
207 | ||
208 | work = tty_insert_flip_string(linux_tty, data, length); | |
209 | ||
210 | if (work != length) | |
211 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
212 | ": %d chars not inserted to flip buffer!\n", | |
213 | length - work); | |
214 | ||
215 | /* | |
216 | * This may sleep if ->low_latency is set | |
217 | */ | |
218 | if (work) | |
219 | tty_flip_buffer_push(linux_tty); | |
220 | } | |
221 | ||
222 | static void ipw_write_packet_sent_callback(void *callback_data, | |
223 | unsigned int packet_length) | |
224 | { | |
225 | struct ipw_tty *tty = callback_data; | |
226 | ||
227 | /* | |
228 | * Packet has been sent, so we subtract the number of bytes from our | |
229 | * tally of outstanding TX bytes. | |
230 | */ | |
231 | tty->tx_bytes_queued -= packet_length; | |
232 | } | |
233 | ||
234 | static int ipw_write(struct tty_struct *linux_tty, | |
235 | const unsigned char *buf, int count) | |
236 | { | |
237 | struct ipw_tty *tty = linux_tty->driver_data; | |
238 | int room, ret; | |
239 | ||
240 | if (!tty) | |
241 | return -ENODEV; | |
242 | ||
243 | mutex_lock(&tty->ipw_tty_mutex); | |
244 | if (!tty->open_count) { | |
245 | mutex_unlock(&tty->ipw_tty_mutex); | |
246 | return -EINVAL; | |
247 | } | |
248 | ||
249 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
250 | if (room < 0) | |
251 | room = 0; | |
252 | /* Don't allow caller to write any more than we have room for */ | |
253 | if (count > room) | |
254 | count = room; | |
255 | ||
256 | if (count == 0) { | |
257 | mutex_unlock(&tty->ipw_tty_mutex); | |
258 | return 0; | |
259 | } | |
260 | ||
261 | ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, | |
ff3e990e | 262 | buf, count, |
099dc4fb DS |
263 | ipw_write_packet_sent_callback, tty); |
264 | if (ret == -1) { | |
265 | mutex_unlock(&tty->ipw_tty_mutex); | |
266 | return 0; | |
267 | } | |
268 | ||
269 | tty->tx_bytes_queued += count; | |
270 | mutex_unlock(&tty->ipw_tty_mutex); | |
271 | ||
272 | return count; | |
273 | } | |
274 | ||
275 | static int ipw_write_room(struct tty_struct *linux_tty) | |
276 | { | |
277 | struct ipw_tty *tty = linux_tty->driver_data; | |
278 | int room; | |
279 | ||
280 | if (!tty) | |
281 | return -ENODEV; | |
282 | ||
283 | if (!tty->open_count) | |
284 | return -EINVAL; | |
285 | ||
286 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
287 | if (room < 0) | |
288 | room = 0; | |
289 | ||
290 | return room; | |
291 | } | |
292 | ||
293 | static int ipwireless_get_serial_info(struct ipw_tty *tty, | |
294 | struct serial_struct __user *retinfo) | |
295 | { | |
296 | struct serial_struct tmp; | |
297 | ||
298 | if (!retinfo) | |
299 | return (-EFAULT); | |
300 | ||
301 | memset(&tmp, 0, sizeof(tmp)); | |
302 | tmp.type = PORT_UNKNOWN; | |
303 | tmp.line = tty->index; | |
304 | tmp.port = 0; | |
305 | tmp.irq = 0; | |
306 | tmp.flags = 0; | |
307 | tmp.baud_base = 115200; | |
308 | tmp.close_delay = 0; | |
309 | tmp.closing_wait = 0; | |
310 | tmp.custom_divisor = 0; | |
311 | tmp.hub6 = 0; | |
312 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
313 | return -EFAULT; | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static int ipw_chars_in_buffer(struct tty_struct *linux_tty) | |
319 | { | |
320 | struct ipw_tty *tty = linux_tty->driver_data; | |
321 | ||
322 | if (!tty) | |
323 | return -ENODEV; | |
324 | ||
325 | if (!tty->open_count) | |
326 | return -EINVAL; | |
327 | ||
328 | return tty->tx_bytes_queued; | |
329 | } | |
330 | ||
331 | static int get_control_lines(struct ipw_tty *tty) | |
332 | { | |
333 | unsigned int my = tty->control_lines; | |
334 | unsigned int out = 0; | |
335 | ||
336 | if (my & IPW_CONTROL_LINE_RTS) | |
337 | out |= TIOCM_RTS; | |
338 | if (my & IPW_CONTROL_LINE_DTR) | |
339 | out |= TIOCM_DTR; | |
340 | if (my & IPW_CONTROL_LINE_CTS) | |
341 | out |= TIOCM_CTS; | |
342 | if (my & IPW_CONTROL_LINE_DSR) | |
343 | out |= TIOCM_DSR; | |
344 | if (my & IPW_CONTROL_LINE_DCD) | |
345 | out |= TIOCM_CD; | |
346 | ||
347 | return out; | |
348 | } | |
349 | ||
350 | static int set_control_lines(struct ipw_tty *tty, unsigned int set, | |
351 | unsigned int clear) | |
352 | { | |
353 | int ret; | |
354 | ||
355 | if (set & TIOCM_RTS) { | |
356 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1); | |
357 | if (ret) | |
358 | return ret; | |
359 | if (tty->secondary_channel_idx != -1) { | |
360 | ret = ipwireless_set_RTS(tty->hardware, | |
361 | tty->secondary_channel_idx, 1); | |
362 | if (ret) | |
363 | return ret; | |
364 | } | |
365 | } | |
366 | if (set & TIOCM_DTR) { | |
367 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1); | |
368 | if (ret) | |
369 | return ret; | |
370 | if (tty->secondary_channel_idx != -1) { | |
371 | ret = ipwireless_set_DTR(tty->hardware, | |
372 | tty->secondary_channel_idx, 1); | |
373 | if (ret) | |
374 | return ret; | |
375 | } | |
376 | } | |
377 | if (clear & TIOCM_RTS) { | |
378 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0); | |
379 | if (tty->secondary_channel_idx != -1) { | |
380 | ret = ipwireless_set_RTS(tty->hardware, | |
381 | tty->secondary_channel_idx, 0); | |
382 | if (ret) | |
383 | return ret; | |
384 | } | |
385 | } | |
386 | if (clear & TIOCM_DTR) { | |
387 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0); | |
388 | if (tty->secondary_channel_idx != -1) { | |
389 | ret = ipwireless_set_DTR(tty->hardware, | |
390 | tty->secondary_channel_idx, 0); | |
391 | if (ret) | |
392 | return ret; | |
393 | } | |
394 | } | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static int ipw_tiocmget(struct tty_struct *linux_tty, struct file *file) | |
399 | { | |
400 | struct ipw_tty *tty = linux_tty->driver_data; | |
401 | ||
402 | if (!tty) | |
403 | return -ENODEV; | |
404 | ||
405 | if (!tty->open_count) | |
406 | return -EINVAL; | |
407 | ||
408 | return get_control_lines(tty); | |
409 | } | |
410 | ||
411 | static int | |
412 | ipw_tiocmset(struct tty_struct *linux_tty, struct file *file, | |
413 | unsigned int set, unsigned int clear) | |
414 | { | |
415 | struct ipw_tty *tty = linux_tty->driver_data; | |
416 | ||
417 | if (!tty) | |
418 | return -ENODEV; | |
419 | ||
420 | if (!tty->open_count) | |
421 | return -EINVAL; | |
422 | ||
423 | return set_control_lines(tty, set, clear); | |
424 | } | |
425 | ||
426 | static int ipw_ioctl(struct tty_struct *linux_tty, struct file *file, | |
427 | unsigned int cmd, unsigned long arg) | |
428 | { | |
429 | struct ipw_tty *tty = linux_tty->driver_data; | |
430 | ||
431 | if (!tty) | |
432 | return -ENODEV; | |
433 | ||
434 | if (!tty->open_count) | |
435 | return -EINVAL; | |
436 | ||
437 | switch (cmd) { | |
438 | case TIOCGSERIAL: | |
439 | return ipwireless_get_serial_info(tty, (void __user *) arg); | |
440 | ||
441 | case TIOCSSERIAL: | |
442 | return 0; /* Keeps the PCMCIA scripts happy. */ | |
443 | } | |
444 | ||
445 | if (tty->tty_type == TTYTYPE_MODEM) { | |
446 | switch (cmd) { | |
447 | case PPPIOCGCHAN: | |
448 | { | |
449 | int chan = ipwireless_ppp_channel_index( | |
450 | tty->network); | |
451 | ||
452 | if (chan < 0) | |
453 | return -ENODEV; | |
454 | if (put_user(chan, (int __user *) arg)) | |
455 | return -EFAULT; | |
456 | } | |
457 | return 0; | |
458 | ||
459 | case PPPIOCGUNIT: | |
460 | { | |
461 | int unit = ipwireless_ppp_unit_number( | |
462 | tty->network); | |
463 | ||
464 | if (unit < 0) | |
465 | return -ENODEV; | |
466 | if (put_user(unit, (int __user *) arg)) | |
467 | return -EFAULT; | |
468 | } | |
469 | return 0; | |
470 | ||
471 | case TCGETS: | |
472 | case TCGETA: | |
473 | return n_tty_ioctl(linux_tty, file, cmd, arg); | |
474 | ||
475 | case TCFLSH: | |
476 | return n_tty_ioctl(linux_tty, file, cmd, arg); | |
477 | ||
478 | case FIONREAD: | |
479 | { | |
480 | int val = 0; | |
481 | ||
482 | if (put_user(val, (int __user *) arg)) | |
483 | return -EFAULT; | |
484 | } | |
485 | return 0; | |
486 | } | |
487 | } | |
488 | ||
489 | return -ENOIOCTLCMD; | |
490 | } | |
491 | ||
492 | static int add_tty(dev_node_t *nodesp, int j, | |
493 | struct ipw_hardware *hardware, | |
494 | struct ipw_network *network, int channel_idx, | |
495 | int secondary_channel_idx, int tty_type) | |
496 | { | |
497 | ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); | |
498 | if (!ttys[j]) | |
499 | return -ENOMEM; | |
500 | ttys[j]->index = j; | |
501 | ttys[j]->hardware = hardware; | |
502 | ttys[j]->channel_idx = channel_idx; | |
503 | ttys[j]->secondary_channel_idx = secondary_channel_idx; | |
504 | ttys[j]->network = network; | |
505 | ttys[j]->tty_type = tty_type; | |
506 | mutex_init(&ttys[j]->ipw_tty_mutex); | |
507 | ||
508 | tty_register_device(ipw_tty_driver, j, NULL); | |
509 | ipwireless_associate_network_tty(network, channel_idx, ttys[j]); | |
510 | ||
511 | if (secondary_channel_idx != -1) | |
512 | ipwireless_associate_network_tty(network, | |
513 | secondary_channel_idx, | |
514 | ttys[j]); | |
515 | if (nodesp != NULL) { | |
516 | sprintf(nodesp->dev_name, "ttyIPWp%d", j); | |
517 | nodesp->major = ipw_tty_driver->major; | |
518 | nodesp->minor = j + ipw_tty_driver->minor_start; | |
519 | } | |
520 | if (get_tty(j + ipw_tty_driver->minor_start) == ttys[j]) | |
521 | report_registering(ttys[j]); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, | |
526 | struct ipw_network *network, | |
527 | dev_node_t *nodes) | |
528 | { | |
529 | int i, j; | |
530 | ||
531 | for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { | |
532 | int allfree = 1; | |
533 | ||
534 | for (j = i; j < IPWIRELESS_PCMCIA_MINORS; | |
535 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) | |
536 | if (ttys[j] != NULL) { | |
537 | allfree = 0; | |
538 | break; | |
539 | } | |
540 | ||
541 | if (allfree) { | |
542 | j = i; | |
543 | ||
544 | if (add_tty(&nodes[0], j, hardware, network, | |
545 | IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, | |
546 | TTYTYPE_MODEM)) | |
547 | return NULL; | |
548 | ||
549 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
550 | if (add_tty(&nodes[1], j, hardware, network, | |
551 | IPW_CHANNEL_DIALLER, -1, | |
552 | TTYTYPE_MONITOR)) | |
553 | return NULL; | |
554 | ||
555 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
556 | if (add_tty(NULL, j, hardware, network, | |
557 | IPW_CHANNEL_RAS, -1, | |
558 | TTYTYPE_RAS_RAW)) | |
559 | return NULL; | |
560 | ||
561 | nodes[0].next = &nodes[1]; | |
562 | nodes[1].next = NULL; | |
563 | ||
564 | return ttys[i]; | |
565 | } | |
566 | } | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | /* | |
571 | * Must be called before ipwireless_network_free(). | |
572 | */ | |
573 | void ipwireless_tty_free(struct ipw_tty *tty) | |
574 | { | |
575 | int j; | |
576 | struct ipw_network *network = ttys[tty->index]->network; | |
577 | ||
578 | for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; | |
579 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) { | |
580 | struct ipw_tty *ttyj = ttys[j]; | |
581 | ||
582 | if (ttyj) { | |
583 | mutex_lock(&ttyj->ipw_tty_mutex); | |
584 | if (get_tty(j + ipw_tty_driver->minor_start) == ttyj) | |
585 | report_deregistering(ttyj); | |
586 | ttyj->closing = 1; | |
587 | if (ttyj->linux_tty != NULL) { | |
588 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
589 | tty_hangup(ttyj->linux_tty); | |
590 | /* Wait till the tty_hangup has completed */ | |
591 | flush_scheduled_work(); | |
592 | mutex_lock(&ttyj->ipw_tty_mutex); | |
593 | } | |
594 | while (ttyj->open_count) | |
595 | do_ipw_close(ttyj); | |
596 | ipwireless_disassociate_network_ttys(network, | |
597 | ttyj->channel_idx); | |
598 | tty_unregister_device(ipw_tty_driver, j); | |
599 | ttys[j] = NULL; | |
600 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
601 | kfree(ttyj); | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | static struct tty_operations tty_ops = { | |
607 | .open = ipw_open, | |
608 | .close = ipw_close, | |
609 | .hangup = ipw_hangup, | |
610 | .write = ipw_write, | |
611 | .write_room = ipw_write_room, | |
612 | .ioctl = ipw_ioctl, | |
613 | .chars_in_buffer = ipw_chars_in_buffer, | |
614 | .tiocmget = ipw_tiocmget, | |
615 | .tiocmset = ipw_tiocmset, | |
616 | }; | |
617 | ||
618 | int ipwireless_tty_init(void) | |
619 | { | |
620 | int result; | |
621 | ||
622 | ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); | |
623 | if (!ipw_tty_driver) | |
624 | return -ENOMEM; | |
625 | ||
626 | ipw_tty_driver->owner = THIS_MODULE; | |
627 | ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; | |
628 | ipw_tty_driver->name = "ttyIPWp"; | |
629 | ipw_tty_driver->major = 0; | |
630 | ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; | |
631 | ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
632 | ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
633 | ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
634 | ipw_tty_driver->init_termios = tty_std_termios; | |
635 | ipw_tty_driver->init_termios.c_cflag = | |
636 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
637 | ipw_tty_driver->init_termios.c_ispeed = 9600; | |
638 | ipw_tty_driver->init_termios.c_ospeed = 9600; | |
639 | tty_set_operations(ipw_tty_driver, &tty_ops); | |
640 | result = tty_register_driver(ipw_tty_driver); | |
641 | if (result) { | |
642 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
643 | ": failed to register tty driver\n"); | |
644 | put_tty_driver(ipw_tty_driver); | |
645 | return result; | |
646 | } | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | void ipwireless_tty_release(void) | |
652 | { | |
653 | int ret; | |
654 | ||
655 | ret = tty_unregister_driver(ipw_tty_driver); | |
656 | put_tty_driver(ipw_tty_driver); | |
657 | if (ret != 0) | |
658 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
659 | ": tty_unregister_driver failed with code %d\n", ret); | |
660 | } | |
661 | ||
662 | int ipwireless_tty_is_modem(struct ipw_tty *tty) | |
663 | { | |
664 | return tty->tty_type == TTYTYPE_MODEM; | |
665 | } | |
666 | ||
667 | void | |
668 | ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, | |
669 | unsigned int channel_idx, | |
670 | unsigned int control_lines, | |
671 | unsigned int changed_mask) | |
672 | { | |
673 | unsigned int old_control_lines = tty->control_lines; | |
674 | ||
675 | tty->control_lines = (tty->control_lines & ~changed_mask) | |
676 | | (control_lines & changed_mask); | |
677 | ||
678 | /* | |
679 | * If DCD is de-asserted, we close the tty so pppd can tell that we | |
680 | * have gone offline. | |
681 | */ | |
682 | if ((old_control_lines & IPW_CONTROL_LINE_DCD) | |
683 | && !(tty->control_lines & IPW_CONTROL_LINE_DCD) | |
684 | && tty->linux_tty) { | |
685 | tty_hangup(tty->linux_tty); | |
686 | } | |
687 | } | |
688 |