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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> | |
099dc4fb DS |
32 | |
33 | #include "tty.h" | |
34 | #include "network.h" | |
35 | #include "hardware.h" | |
36 | #include "main.h" | |
37 | ||
38 | #define IPWIRELESS_PCMCIA_START (0) | |
39 | #define IPWIRELESS_PCMCIA_MINORS (24) | |
40 | #define IPWIRELESS_PCMCIA_MINOR_RANGE (8) | |
41 | ||
42 | #define TTYTYPE_MODEM (0) | |
43 | #define TTYTYPE_MONITOR (1) | |
44 | #define TTYTYPE_RAS_RAW (2) | |
45 | ||
46 | struct ipw_tty { | |
47 | int index; | |
48 | struct ipw_hardware *hardware; | |
49 | unsigned int channel_idx; | |
50 | unsigned int secondary_channel_idx; | |
51 | int tty_type; | |
52 | struct ipw_network *network; | |
53 | struct tty_struct *linux_tty; | |
54 | int open_count; | |
55 | unsigned int control_lines; | |
56 | struct mutex ipw_tty_mutex; | |
57 | int tx_bytes_queued; | |
58 | int closing; | |
59 | }; | |
60 | ||
61 | static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS]; | |
62 | ||
63 | static struct tty_driver *ipw_tty_driver; | |
64 | ||
65 | static char *tty_type_name(int tty_type) | |
66 | { | |
67 | static char *channel_names[] = { | |
68 | "modem", | |
69 | "monitor", | |
70 | "RAS-raw" | |
71 | }; | |
72 | ||
73 | return channel_names[tty_type]; | |
74 | } | |
75 | ||
76 | static void report_registering(struct ipw_tty *tty) | |
77 | { | |
78 | char *iftype = tty_type_name(tty->tty_type); | |
79 | ||
80 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
81 | ": registering %s device ttyIPWp%d\n", iftype, tty->index); | |
82 | } | |
83 | ||
84 | static void report_deregistering(struct ipw_tty *tty) | |
85 | { | |
86 | char *iftype = tty_type_name(tty->tty_type); | |
87 | ||
88 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
89 | ": deregistering %s device ttyIPWp%d\n", iftype, | |
90 | tty->index); | |
91 | } | |
92 | ||
93 | static struct ipw_tty *get_tty(int minor) | |
94 | { | |
95 | if (minor < ipw_tty_driver->minor_start | |
96 | || minor >= ipw_tty_driver->minor_start + | |
97 | IPWIRELESS_PCMCIA_MINORS) | |
98 | return NULL; | |
99 | else { | |
100 | int minor_offset = minor - ipw_tty_driver->minor_start; | |
101 | ||
102 | /* | |
103 | * The 'ras_raw' channel is only available when 'loopback' mode | |
104 | * is enabled. | |
105 | * Number of minor starts with 16 (_RANGE * _RAS_RAW). | |
106 | */ | |
107 | if (!ipwireless_loopback && | |
108 | minor_offset >= | |
109 | IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW) | |
110 | return NULL; | |
111 | ||
112 | return ttys[minor_offset]; | |
113 | } | |
114 | } | |
115 | ||
116 | static int ipw_open(struct tty_struct *linux_tty, struct file *filp) | |
117 | { | |
118 | int minor = linux_tty->index; | |
119 | struct ipw_tty *tty = get_tty(minor); | |
120 | ||
121 | if (!tty) | |
122 | return -ENODEV; | |
123 | ||
124 | mutex_lock(&tty->ipw_tty_mutex); | |
125 | ||
126 | if (tty->closing) { | |
127 | mutex_unlock(&tty->ipw_tty_mutex); | |
128 | return -ENODEV; | |
129 | } | |
130 | if (tty->open_count == 0) | |
131 | tty->tx_bytes_queued = 0; | |
132 | ||
133 | tty->open_count++; | |
134 | ||
135 | tty->linux_tty = linux_tty; | |
136 | linux_tty->driver_data = tty; | |
137 | linux_tty->low_latency = 1; | |
138 | ||
139 | if (tty->tty_type == TTYTYPE_MODEM) | |
140 | ipwireless_ppp_open(tty->network); | |
141 | ||
142 | mutex_unlock(&tty->ipw_tty_mutex); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | static void do_ipw_close(struct ipw_tty *tty) | |
148 | { | |
149 | tty->open_count--; | |
150 | ||
151 | if (tty->open_count == 0) { | |
152 | struct tty_struct *linux_tty = tty->linux_tty; | |
153 | ||
154 | if (linux_tty != NULL) { | |
155 | tty->linux_tty = NULL; | |
156 | linux_tty->driver_data = NULL; | |
157 | ||
158 | if (tty->tty_type == TTYTYPE_MODEM) | |
159 | ipwireless_ppp_close(tty->network); | |
160 | } | |
161 | } | |
162 | } | |
163 | ||
164 | static void ipw_hangup(struct tty_struct *linux_tty) | |
165 | { | |
166 | struct ipw_tty *tty = linux_tty->driver_data; | |
167 | ||
168 | if (!tty) | |
169 | return; | |
170 | ||
171 | mutex_lock(&tty->ipw_tty_mutex); | |
172 | if (tty->open_count == 0) { | |
173 | mutex_unlock(&tty->ipw_tty_mutex); | |
174 | return; | |
175 | } | |
176 | ||
177 | do_ipw_close(tty); | |
178 | ||
179 | mutex_unlock(&tty->ipw_tty_mutex); | |
180 | } | |
181 | ||
182 | static void ipw_close(struct tty_struct *linux_tty, struct file *filp) | |
183 | { | |
184 | ipw_hangup(linux_tty); | |
185 | } | |
186 | ||
187 | /* Take data received from hardware, and send it out the tty */ | |
188 | void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, | |
189 | unsigned int length) | |
190 | { | |
191 | struct tty_struct *linux_tty; | |
192 | int work = 0; | |
193 | ||
194 | mutex_lock(&tty->ipw_tty_mutex); | |
195 | linux_tty = tty->linux_tty; | |
196 | if (linux_tty == NULL) { | |
197 | mutex_unlock(&tty->ipw_tty_mutex); | |
198 | return; | |
199 | } | |
200 | ||
201 | if (!tty->open_count) { | |
202 | mutex_unlock(&tty->ipw_tty_mutex); | |
203 | return; | |
204 | } | |
205 | mutex_unlock(&tty->ipw_tty_mutex); | |
206 | ||
207 | work = tty_insert_flip_string(linux_tty, data, length); | |
208 | ||
209 | if (work != length) | |
210 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
211 | ": %d chars not inserted to flip buffer!\n", | |
212 | length - work); | |
213 | ||
214 | /* | |
215 | * This may sleep if ->low_latency is set | |
216 | */ | |
217 | if (work) | |
218 | tty_flip_buffer_push(linux_tty); | |
219 | } | |
220 | ||
221 | static void ipw_write_packet_sent_callback(void *callback_data, | |
222 | unsigned int packet_length) | |
223 | { | |
224 | struct ipw_tty *tty = callback_data; | |
225 | ||
226 | /* | |
227 | * Packet has been sent, so we subtract the number of bytes from our | |
228 | * tally of outstanding TX bytes. | |
229 | */ | |
230 | tty->tx_bytes_queued -= packet_length; | |
231 | } | |
232 | ||
233 | static int ipw_write(struct tty_struct *linux_tty, | |
234 | const unsigned char *buf, int count) | |
235 | { | |
236 | struct ipw_tty *tty = linux_tty->driver_data; | |
237 | int room, ret; | |
238 | ||
239 | if (!tty) | |
240 | return -ENODEV; | |
241 | ||
242 | mutex_lock(&tty->ipw_tty_mutex); | |
243 | if (!tty->open_count) { | |
244 | mutex_unlock(&tty->ipw_tty_mutex); | |
245 | return -EINVAL; | |
246 | } | |
247 | ||
248 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
249 | if (room < 0) | |
250 | room = 0; | |
251 | /* Don't allow caller to write any more than we have room for */ | |
252 | if (count > room) | |
253 | count = room; | |
254 | ||
255 | if (count == 0) { | |
256 | mutex_unlock(&tty->ipw_tty_mutex); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, | |
ff3e990e | 261 | buf, count, |
099dc4fb DS |
262 | ipw_write_packet_sent_callback, tty); |
263 | if (ret == -1) { | |
264 | mutex_unlock(&tty->ipw_tty_mutex); | |
265 | return 0; | |
266 | } | |
267 | ||
268 | tty->tx_bytes_queued += count; | |
269 | mutex_unlock(&tty->ipw_tty_mutex); | |
270 | ||
271 | return count; | |
272 | } | |
273 | ||
274 | static int ipw_write_room(struct tty_struct *linux_tty) | |
275 | { | |
276 | struct ipw_tty *tty = linux_tty->driver_data; | |
277 | int room; | |
278 | ||
5aaa70a8 | 279 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
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) | |
23198fda | 323 | return 0; |
099dc4fb DS |
324 | |
325 | if (!tty->open_count) | |
23198fda | 326 | return 0; |
099dc4fb DS |
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 | ||
60b33c13 | 398 | static int ipw_tiocmget(struct tty_struct *linux_tty) |
099dc4fb DS |
399 | { |
400 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 401 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
402 | |
403 | if (!tty) | |
404 | return -ENODEV; | |
405 | ||
406 | if (!tty->open_count) | |
407 | return -EINVAL; | |
408 | ||
409 | return get_control_lines(tty); | |
410 | } | |
411 | ||
412 | static int | |
20b9d177 | 413 | ipw_tiocmset(struct tty_struct *linux_tty, |
099dc4fb DS |
414 | unsigned int set, unsigned int clear) |
415 | { | |
416 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 417 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
418 | |
419 | if (!tty) | |
420 | return -ENODEV; | |
421 | ||
422 | if (!tty->open_count) | |
423 | return -EINVAL; | |
424 | ||
425 | return set_control_lines(tty, set, clear); | |
426 | } | |
427 | ||
6caa76b7 | 428 | static int ipw_ioctl(struct tty_struct *linux_tty, |
099dc4fb DS |
429 | unsigned int cmd, unsigned long arg) |
430 | { | |
431 | struct ipw_tty *tty = linux_tty->driver_data; | |
432 | ||
433 | if (!tty) | |
434 | return -ENODEV; | |
435 | ||
436 | if (!tty->open_count) | |
437 | return -EINVAL; | |
438 | ||
5aaa70a8 AC |
439 | /* FIXME: Exactly how is the tty object locked here .. */ |
440 | ||
099dc4fb DS |
441 | switch (cmd) { |
442 | case TIOCGSERIAL: | |
443 | return ipwireless_get_serial_info(tty, (void __user *) arg); | |
444 | ||
445 | case TIOCSSERIAL: | |
446 | return 0; /* Keeps the PCMCIA scripts happy. */ | |
447 | } | |
448 | ||
449 | if (tty->tty_type == TTYTYPE_MODEM) { | |
450 | switch (cmd) { | |
451 | case PPPIOCGCHAN: | |
452 | { | |
453 | int chan = ipwireless_ppp_channel_index( | |
454 | tty->network); | |
455 | ||
456 | if (chan < 0) | |
457 | return -ENODEV; | |
458 | if (put_user(chan, (int __user *) arg)) | |
459 | return -EFAULT; | |
460 | } | |
461 | return 0; | |
462 | ||
463 | case PPPIOCGUNIT: | |
464 | { | |
465 | int unit = ipwireless_ppp_unit_number( | |
466 | tty->network); | |
467 | ||
468 | if (unit < 0) | |
469 | return -ENODEV; | |
470 | if (put_user(unit, (int __user *) arg)) | |
471 | return -EFAULT; | |
472 | } | |
473 | return 0; | |
474 | ||
099dc4fb DS |
475 | case FIONREAD: |
476 | { | |
477 | int val = 0; | |
478 | ||
479 | if (put_user(val, (int __user *) arg)) | |
480 | return -EFAULT; | |
481 | } | |
482 | return 0; | |
5aaa70a8 AC |
483 | case TCFLSH: |
484 | return tty_perform_flush(linux_tty, arg); | |
099dc4fb DS |
485 | } |
486 | } | |
6caa76b7 | 487 | return -ENOIOCTLCMD; |
099dc4fb DS |
488 | } |
489 | ||
b498ada6 | 490 | static int add_tty(int j, |
099dc4fb DS |
491 | struct ipw_hardware *hardware, |
492 | struct ipw_network *network, int channel_idx, | |
493 | int secondary_channel_idx, int tty_type) | |
494 | { | |
495 | ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); | |
496 | if (!ttys[j]) | |
497 | return -ENOMEM; | |
498 | ttys[j]->index = j; | |
499 | ttys[j]->hardware = hardware; | |
500 | ttys[j]->channel_idx = channel_idx; | |
501 | ttys[j]->secondary_channel_idx = secondary_channel_idx; | |
502 | ttys[j]->network = network; | |
503 | ttys[j]->tty_type = tty_type; | |
504 | mutex_init(&ttys[j]->ipw_tty_mutex); | |
505 | ||
506 | tty_register_device(ipw_tty_driver, j, NULL); | |
507 | ipwireless_associate_network_tty(network, channel_idx, ttys[j]); | |
508 | ||
509 | if (secondary_channel_idx != -1) | |
510 | ipwireless_associate_network_tty(network, | |
511 | secondary_channel_idx, | |
512 | ttys[j]); | |
099dc4fb DS |
513 | if (get_tty(j + ipw_tty_driver->minor_start) == ttys[j]) |
514 | report_registering(ttys[j]); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, | |
b498ada6 | 519 | struct ipw_network *network) |
099dc4fb DS |
520 | { |
521 | int i, j; | |
522 | ||
523 | for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { | |
524 | int allfree = 1; | |
525 | ||
526 | for (j = i; j < IPWIRELESS_PCMCIA_MINORS; | |
527 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) | |
528 | if (ttys[j] != NULL) { | |
529 | allfree = 0; | |
530 | break; | |
531 | } | |
532 | ||
533 | if (allfree) { | |
534 | j = i; | |
535 | ||
b498ada6 | 536 | if (add_tty(j, hardware, network, |
099dc4fb DS |
537 | IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, |
538 | TTYTYPE_MODEM)) | |
539 | return NULL; | |
540 | ||
541 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 542 | if (add_tty(j, hardware, network, |
099dc4fb DS |
543 | IPW_CHANNEL_DIALLER, -1, |
544 | TTYTYPE_MONITOR)) | |
545 | return NULL; | |
546 | ||
547 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 548 | if (add_tty(j, hardware, network, |
099dc4fb DS |
549 | IPW_CHANNEL_RAS, -1, |
550 | TTYTYPE_RAS_RAW)) | |
551 | return NULL; | |
552 | ||
099dc4fb DS |
553 | return ttys[i]; |
554 | } | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | /* | |
560 | * Must be called before ipwireless_network_free(). | |
561 | */ | |
562 | void ipwireless_tty_free(struct ipw_tty *tty) | |
563 | { | |
564 | int j; | |
565 | struct ipw_network *network = ttys[tty->index]->network; | |
566 | ||
567 | for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; | |
568 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) { | |
569 | struct ipw_tty *ttyj = ttys[j]; | |
570 | ||
571 | if (ttyj) { | |
572 | mutex_lock(&ttyj->ipw_tty_mutex); | |
573 | if (get_tty(j + ipw_tty_driver->minor_start) == ttyj) | |
574 | report_deregistering(ttyj); | |
575 | ttyj->closing = 1; | |
576 | if (ttyj->linux_tty != NULL) { | |
577 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
578 | tty_hangup(ttyj->linux_tty); | |
579 | /* Wait till the tty_hangup has completed */ | |
404437ef | 580 | flush_work_sync(&ttyj->linux_tty->hangup_work); |
5aaa70a8 AC |
581 | /* FIXME: Exactly how is the tty object locked here |
582 | against a parallel ioctl etc */ | |
099dc4fb DS |
583 | mutex_lock(&ttyj->ipw_tty_mutex); |
584 | } | |
585 | while (ttyj->open_count) | |
586 | do_ipw_close(ttyj); | |
587 | ipwireless_disassociate_network_ttys(network, | |
588 | ttyj->channel_idx); | |
589 | tty_unregister_device(ipw_tty_driver, j); | |
590 | ttys[j] = NULL; | |
591 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
592 | kfree(ttyj); | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
1cceefd3 | 597 | static const struct tty_operations tty_ops = { |
099dc4fb DS |
598 | .open = ipw_open, |
599 | .close = ipw_close, | |
600 | .hangup = ipw_hangup, | |
601 | .write = ipw_write, | |
602 | .write_room = ipw_write_room, | |
603 | .ioctl = ipw_ioctl, | |
604 | .chars_in_buffer = ipw_chars_in_buffer, | |
605 | .tiocmget = ipw_tiocmget, | |
606 | .tiocmset = ipw_tiocmset, | |
607 | }; | |
608 | ||
609 | int ipwireless_tty_init(void) | |
610 | { | |
611 | int result; | |
612 | ||
613 | ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); | |
614 | if (!ipw_tty_driver) | |
615 | return -ENOMEM; | |
616 | ||
617 | ipw_tty_driver->owner = THIS_MODULE; | |
618 | ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; | |
619 | ipw_tty_driver->name = "ttyIPWp"; | |
620 | ipw_tty_driver->major = 0; | |
621 | ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; | |
622 | ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
623 | ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
624 | ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
625 | ipw_tty_driver->init_termios = tty_std_termios; | |
626 | ipw_tty_driver->init_termios.c_cflag = | |
627 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
628 | ipw_tty_driver->init_termios.c_ispeed = 9600; | |
629 | ipw_tty_driver->init_termios.c_ospeed = 9600; | |
630 | tty_set_operations(ipw_tty_driver, &tty_ops); | |
631 | result = tty_register_driver(ipw_tty_driver); | |
632 | if (result) { | |
633 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
634 | ": failed to register tty driver\n"); | |
635 | put_tty_driver(ipw_tty_driver); | |
636 | return result; | |
637 | } | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | void ipwireless_tty_release(void) | |
643 | { | |
644 | int ret; | |
645 | ||
646 | ret = tty_unregister_driver(ipw_tty_driver); | |
647 | put_tty_driver(ipw_tty_driver); | |
648 | if (ret != 0) | |
649 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
650 | ": tty_unregister_driver failed with code %d\n", ret); | |
651 | } | |
652 | ||
653 | int ipwireless_tty_is_modem(struct ipw_tty *tty) | |
654 | { | |
655 | return tty->tty_type == TTYTYPE_MODEM; | |
656 | } | |
657 | ||
658 | void | |
659 | ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, | |
660 | unsigned int channel_idx, | |
661 | unsigned int control_lines, | |
662 | unsigned int changed_mask) | |
663 | { | |
664 | unsigned int old_control_lines = tty->control_lines; | |
665 | ||
666 | tty->control_lines = (tty->control_lines & ~changed_mask) | |
667 | | (control_lines & changed_mask); | |
668 | ||
669 | /* | |
670 | * If DCD is de-asserted, we close the tty so pppd can tell that we | |
671 | * have gone offline. | |
672 | */ | |
673 | if ((old_control_lines & IPW_CONTROL_LINE_DCD) | |
674 | && !(tty->control_lines & IPW_CONTROL_LINE_DCD) | |
675 | && tty->linux_tty) { | |
676 | tty_hangup(tty->linux_tty); | |
677 | } | |
678 | } | |
679 |