Commit | Line | Data |
---|---|---|
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> | |
4b32da2b | 24 | #include <linux/ppp-ioctl.h> |
099dc4fb DS |
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 { | |
7393af80 | 47 | struct tty_port port; |
099dc4fb DS |
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; | |
099dc4fb DS |
54 | unsigned int control_lines; |
55 | struct mutex ipw_tty_mutex; | |
56 | int tx_bytes_queued; | |
57 | int closing; | |
58 | }; | |
59 | ||
60 | static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS]; | |
61 | ||
62 | static struct tty_driver *ipw_tty_driver; | |
63 | ||
64 | static char *tty_type_name(int tty_type) | |
65 | { | |
66 | static char *channel_names[] = { | |
67 | "modem", | |
68 | "monitor", | |
69 | "RAS-raw" | |
70 | }; | |
71 | ||
72 | return channel_names[tty_type]; | |
73 | } | |
74 | ||
ecaa3bda | 75 | static struct ipw_tty *get_tty(int index) |
099dc4fb | 76 | { |
ecaa3bda JS |
77 | /* |
78 | * The 'ras_raw' channel is only available when 'loopback' mode | |
79 | * is enabled. | |
80 | * Number of minor starts with 16 (_RANGE * _RAS_RAW). | |
81 | */ | |
82 | if (!ipwireless_loopback && index >= | |
83 | IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW) | |
099dc4fb | 84 | return NULL; |
ecaa3bda JS |
85 | |
86 | return ttys[index]; | |
099dc4fb DS |
87 | } |
88 | ||
89 | static int ipw_open(struct tty_struct *linux_tty, struct file *filp) | |
90 | { | |
ecaa3bda | 91 | struct ipw_tty *tty = get_tty(linux_tty->index); |
099dc4fb DS |
92 | |
93 | if (!tty) | |
94 | return -ENODEV; | |
95 | ||
96 | mutex_lock(&tty->ipw_tty_mutex); | |
97 | ||
98 | if (tty->closing) { | |
99 | mutex_unlock(&tty->ipw_tty_mutex); | |
100 | return -ENODEV; | |
101 | } | |
7393af80 | 102 | if (tty->port.count == 0) |
099dc4fb DS |
103 | tty->tx_bytes_queued = 0; |
104 | ||
7393af80 | 105 | tty->port.count++; |
099dc4fb | 106 | |
19ef1b71 | 107 | tty->port.tty = linux_tty; |
099dc4fb DS |
108 | linux_tty->driver_data = tty; |
109 | linux_tty->low_latency = 1; | |
110 | ||
111 | if (tty->tty_type == TTYTYPE_MODEM) | |
112 | ipwireless_ppp_open(tty->network); | |
113 | ||
114 | mutex_unlock(&tty->ipw_tty_mutex); | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | static void do_ipw_close(struct ipw_tty *tty) | |
120 | { | |
7393af80 | 121 | tty->port.count--; |
099dc4fb | 122 | |
7393af80 | 123 | if (tty->port.count == 0) { |
19ef1b71 | 124 | struct tty_struct *linux_tty = tty->port.tty; |
099dc4fb DS |
125 | |
126 | if (linux_tty != NULL) { | |
19ef1b71 | 127 | tty->port.tty = NULL; |
099dc4fb DS |
128 | linux_tty->driver_data = NULL; |
129 | ||
130 | if (tty->tty_type == TTYTYPE_MODEM) | |
131 | ipwireless_ppp_close(tty->network); | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
136 | static void ipw_hangup(struct tty_struct *linux_tty) | |
137 | { | |
138 | struct ipw_tty *tty = linux_tty->driver_data; | |
139 | ||
140 | if (!tty) | |
141 | return; | |
142 | ||
143 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 144 | if (tty->port.count == 0) { |
099dc4fb DS |
145 | mutex_unlock(&tty->ipw_tty_mutex); |
146 | return; | |
147 | } | |
148 | ||
149 | do_ipw_close(tty); | |
150 | ||
151 | mutex_unlock(&tty->ipw_tty_mutex); | |
152 | } | |
153 | ||
154 | static void ipw_close(struct tty_struct *linux_tty, struct file *filp) | |
155 | { | |
156 | ipw_hangup(linux_tty); | |
157 | } | |
158 | ||
159 | /* Take data received from hardware, and send it out the tty */ | |
160 | void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, | |
161 | unsigned int length) | |
162 | { | |
163 | struct tty_struct *linux_tty; | |
164 | int work = 0; | |
165 | ||
166 | mutex_lock(&tty->ipw_tty_mutex); | |
19ef1b71 | 167 | linux_tty = tty->port.tty; |
099dc4fb DS |
168 | if (linux_tty == NULL) { |
169 | mutex_unlock(&tty->ipw_tty_mutex); | |
170 | return; | |
171 | } | |
172 | ||
7393af80 | 173 | if (!tty->port.count) { |
099dc4fb DS |
174 | mutex_unlock(&tty->ipw_tty_mutex); |
175 | return; | |
176 | } | |
177 | mutex_unlock(&tty->ipw_tty_mutex); | |
178 | ||
179 | work = tty_insert_flip_string(linux_tty, data, length); | |
180 | ||
181 | if (work != length) | |
182 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
183 | ": %d chars not inserted to flip buffer!\n", | |
184 | length - work); | |
185 | ||
186 | /* | |
187 | * This may sleep if ->low_latency is set | |
188 | */ | |
189 | if (work) | |
190 | tty_flip_buffer_push(linux_tty); | |
191 | } | |
192 | ||
193 | static void ipw_write_packet_sent_callback(void *callback_data, | |
194 | unsigned int packet_length) | |
195 | { | |
196 | struct ipw_tty *tty = callback_data; | |
197 | ||
198 | /* | |
199 | * Packet has been sent, so we subtract the number of bytes from our | |
200 | * tally of outstanding TX bytes. | |
201 | */ | |
202 | tty->tx_bytes_queued -= packet_length; | |
203 | } | |
204 | ||
205 | static int ipw_write(struct tty_struct *linux_tty, | |
206 | const unsigned char *buf, int count) | |
207 | { | |
208 | struct ipw_tty *tty = linux_tty->driver_data; | |
209 | int room, ret; | |
210 | ||
211 | if (!tty) | |
212 | return -ENODEV; | |
213 | ||
214 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 215 | if (!tty->port.count) { |
099dc4fb DS |
216 | mutex_unlock(&tty->ipw_tty_mutex); |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
221 | if (room < 0) | |
222 | room = 0; | |
223 | /* Don't allow caller to write any more than we have room for */ | |
224 | if (count > room) | |
225 | count = room; | |
226 | ||
227 | if (count == 0) { | |
228 | mutex_unlock(&tty->ipw_tty_mutex); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, | |
ff3e990e | 233 | buf, count, |
099dc4fb DS |
234 | ipw_write_packet_sent_callback, tty); |
235 | if (ret == -1) { | |
236 | mutex_unlock(&tty->ipw_tty_mutex); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | tty->tx_bytes_queued += count; | |
241 | mutex_unlock(&tty->ipw_tty_mutex); | |
242 | ||
243 | return count; | |
244 | } | |
245 | ||
246 | static int ipw_write_room(struct tty_struct *linux_tty) | |
247 | { | |
248 | struct ipw_tty *tty = linux_tty->driver_data; | |
249 | int room; | |
250 | ||
5aaa70a8 | 251 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
252 | if (!tty) |
253 | return -ENODEV; | |
254 | ||
7393af80 | 255 | if (!tty->port.count) |
099dc4fb DS |
256 | return -EINVAL; |
257 | ||
258 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
259 | if (room < 0) | |
260 | room = 0; | |
261 | ||
262 | return room; | |
263 | } | |
264 | ||
265 | static int ipwireless_get_serial_info(struct ipw_tty *tty, | |
266 | struct serial_struct __user *retinfo) | |
267 | { | |
268 | struct serial_struct tmp; | |
269 | ||
270 | if (!retinfo) | |
271 | return (-EFAULT); | |
272 | ||
273 | memset(&tmp, 0, sizeof(tmp)); | |
274 | tmp.type = PORT_UNKNOWN; | |
275 | tmp.line = tty->index; | |
276 | tmp.port = 0; | |
277 | tmp.irq = 0; | |
278 | tmp.flags = 0; | |
279 | tmp.baud_base = 115200; | |
280 | tmp.close_delay = 0; | |
281 | tmp.closing_wait = 0; | |
282 | tmp.custom_divisor = 0; | |
283 | tmp.hub6 = 0; | |
284 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
285 | return -EFAULT; | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | static int ipw_chars_in_buffer(struct tty_struct *linux_tty) | |
291 | { | |
292 | struct ipw_tty *tty = linux_tty->driver_data; | |
293 | ||
294 | if (!tty) | |
23198fda | 295 | return 0; |
099dc4fb | 296 | |
7393af80 | 297 | if (!tty->port.count) |
23198fda | 298 | return 0; |
099dc4fb DS |
299 | |
300 | return tty->tx_bytes_queued; | |
301 | } | |
302 | ||
303 | static int get_control_lines(struct ipw_tty *tty) | |
304 | { | |
305 | unsigned int my = tty->control_lines; | |
306 | unsigned int out = 0; | |
307 | ||
308 | if (my & IPW_CONTROL_LINE_RTS) | |
309 | out |= TIOCM_RTS; | |
310 | if (my & IPW_CONTROL_LINE_DTR) | |
311 | out |= TIOCM_DTR; | |
312 | if (my & IPW_CONTROL_LINE_CTS) | |
313 | out |= TIOCM_CTS; | |
314 | if (my & IPW_CONTROL_LINE_DSR) | |
315 | out |= TIOCM_DSR; | |
316 | if (my & IPW_CONTROL_LINE_DCD) | |
317 | out |= TIOCM_CD; | |
318 | ||
319 | return out; | |
320 | } | |
321 | ||
322 | static int set_control_lines(struct ipw_tty *tty, unsigned int set, | |
323 | unsigned int clear) | |
324 | { | |
325 | int ret; | |
326 | ||
327 | if (set & TIOCM_RTS) { | |
328 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1); | |
329 | if (ret) | |
330 | return ret; | |
331 | if (tty->secondary_channel_idx != -1) { | |
332 | ret = ipwireless_set_RTS(tty->hardware, | |
333 | tty->secondary_channel_idx, 1); | |
334 | if (ret) | |
335 | return ret; | |
336 | } | |
337 | } | |
338 | if (set & TIOCM_DTR) { | |
339 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1); | |
340 | if (ret) | |
341 | return ret; | |
342 | if (tty->secondary_channel_idx != -1) { | |
343 | ret = ipwireless_set_DTR(tty->hardware, | |
344 | tty->secondary_channel_idx, 1); | |
345 | if (ret) | |
346 | return ret; | |
347 | } | |
348 | } | |
349 | if (clear & TIOCM_RTS) { | |
350 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0); | |
351 | if (tty->secondary_channel_idx != -1) { | |
352 | ret = ipwireless_set_RTS(tty->hardware, | |
353 | tty->secondary_channel_idx, 0); | |
354 | if (ret) | |
355 | return ret; | |
356 | } | |
357 | } | |
358 | if (clear & TIOCM_DTR) { | |
359 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0); | |
360 | if (tty->secondary_channel_idx != -1) { | |
361 | ret = ipwireless_set_DTR(tty->hardware, | |
362 | tty->secondary_channel_idx, 0); | |
363 | if (ret) | |
364 | return ret; | |
365 | } | |
366 | } | |
367 | return 0; | |
368 | } | |
369 | ||
60b33c13 | 370 | static int ipw_tiocmget(struct tty_struct *linux_tty) |
099dc4fb DS |
371 | { |
372 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 373 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
374 | |
375 | if (!tty) | |
376 | return -ENODEV; | |
377 | ||
7393af80 | 378 | if (!tty->port.count) |
099dc4fb DS |
379 | return -EINVAL; |
380 | ||
381 | return get_control_lines(tty); | |
382 | } | |
383 | ||
384 | static int | |
20b9d177 | 385 | ipw_tiocmset(struct tty_struct *linux_tty, |
099dc4fb DS |
386 | unsigned int set, unsigned int clear) |
387 | { | |
388 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 389 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
390 | |
391 | if (!tty) | |
392 | return -ENODEV; | |
393 | ||
7393af80 | 394 | if (!tty->port.count) |
099dc4fb DS |
395 | return -EINVAL; |
396 | ||
397 | return set_control_lines(tty, set, clear); | |
398 | } | |
399 | ||
6caa76b7 | 400 | static int ipw_ioctl(struct tty_struct *linux_tty, |
099dc4fb DS |
401 | unsigned int cmd, unsigned long arg) |
402 | { | |
403 | struct ipw_tty *tty = linux_tty->driver_data; | |
404 | ||
405 | if (!tty) | |
406 | return -ENODEV; | |
407 | ||
7393af80 | 408 | if (!tty->port.count) |
099dc4fb DS |
409 | return -EINVAL; |
410 | ||
5aaa70a8 AC |
411 | /* FIXME: Exactly how is the tty object locked here .. */ |
412 | ||
099dc4fb DS |
413 | switch (cmd) { |
414 | case TIOCGSERIAL: | |
415 | return ipwireless_get_serial_info(tty, (void __user *) arg); | |
416 | ||
417 | case TIOCSSERIAL: | |
418 | return 0; /* Keeps the PCMCIA scripts happy. */ | |
419 | } | |
420 | ||
421 | if (tty->tty_type == TTYTYPE_MODEM) { | |
422 | switch (cmd) { | |
423 | case PPPIOCGCHAN: | |
424 | { | |
425 | int chan = ipwireless_ppp_channel_index( | |
426 | tty->network); | |
427 | ||
428 | if (chan < 0) | |
429 | return -ENODEV; | |
430 | if (put_user(chan, (int __user *) arg)) | |
431 | return -EFAULT; | |
432 | } | |
433 | return 0; | |
434 | ||
435 | case PPPIOCGUNIT: | |
436 | { | |
437 | int unit = ipwireless_ppp_unit_number( | |
438 | tty->network); | |
439 | ||
440 | if (unit < 0) | |
441 | return -ENODEV; | |
442 | if (put_user(unit, (int __user *) arg)) | |
443 | return -EFAULT; | |
444 | } | |
445 | return 0; | |
446 | ||
099dc4fb DS |
447 | case FIONREAD: |
448 | { | |
449 | int val = 0; | |
450 | ||
451 | if (put_user(val, (int __user *) arg)) | |
452 | return -EFAULT; | |
453 | } | |
454 | return 0; | |
5aaa70a8 AC |
455 | case TCFLSH: |
456 | return tty_perform_flush(linux_tty, arg); | |
099dc4fb DS |
457 | } |
458 | } | |
6caa76b7 | 459 | return -ENOIOCTLCMD; |
099dc4fb DS |
460 | } |
461 | ||
b498ada6 | 462 | static int add_tty(int j, |
099dc4fb DS |
463 | struct ipw_hardware *hardware, |
464 | struct ipw_network *network, int channel_idx, | |
465 | int secondary_channel_idx, int tty_type) | |
466 | { | |
467 | ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); | |
468 | if (!ttys[j]) | |
469 | return -ENOMEM; | |
470 | ttys[j]->index = j; | |
471 | ttys[j]->hardware = hardware; | |
472 | ttys[j]->channel_idx = channel_idx; | |
473 | ttys[j]->secondary_channel_idx = secondary_channel_idx; | |
474 | ttys[j]->network = network; | |
475 | ttys[j]->tty_type = tty_type; | |
476 | mutex_init(&ttys[j]->ipw_tty_mutex); | |
7393af80 | 477 | tty_port_init(&ttys[j]->port); |
099dc4fb | 478 | |
734cc178 | 479 | tty_port_register_device(&ttys[j]->port, ipw_tty_driver, j, NULL); |
099dc4fb DS |
480 | ipwireless_associate_network_tty(network, channel_idx, ttys[j]); |
481 | ||
482 | if (secondary_channel_idx != -1) | |
483 | ipwireless_associate_network_tty(network, | |
484 | secondary_channel_idx, | |
485 | ttys[j]); | |
e6df3cce JS |
486 | /* check if we provide raw device (if loopback is enabled) */ |
487 | if (get_tty(j)) | |
488 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
489 | ": registering %s device ttyIPWp%d\n", | |
490 | tty_type_name(tty_type), j); | |
491 | ||
099dc4fb DS |
492 | return 0; |
493 | } | |
494 | ||
495 | struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, | |
b498ada6 | 496 | struct ipw_network *network) |
099dc4fb DS |
497 | { |
498 | int i, j; | |
499 | ||
500 | for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { | |
501 | int allfree = 1; | |
502 | ||
503 | for (j = i; j < IPWIRELESS_PCMCIA_MINORS; | |
504 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) | |
505 | if (ttys[j] != NULL) { | |
506 | allfree = 0; | |
507 | break; | |
508 | } | |
509 | ||
510 | if (allfree) { | |
511 | j = i; | |
512 | ||
b498ada6 | 513 | if (add_tty(j, hardware, network, |
099dc4fb DS |
514 | IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, |
515 | TTYTYPE_MODEM)) | |
516 | return NULL; | |
517 | ||
518 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 519 | if (add_tty(j, hardware, network, |
099dc4fb DS |
520 | IPW_CHANNEL_DIALLER, -1, |
521 | TTYTYPE_MONITOR)) | |
522 | return NULL; | |
523 | ||
524 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 525 | if (add_tty(j, hardware, network, |
099dc4fb DS |
526 | IPW_CHANNEL_RAS, -1, |
527 | TTYTYPE_RAS_RAW)) | |
528 | return NULL; | |
529 | ||
099dc4fb DS |
530 | return ttys[i]; |
531 | } | |
532 | } | |
533 | return NULL; | |
534 | } | |
535 | ||
536 | /* | |
537 | * Must be called before ipwireless_network_free(). | |
538 | */ | |
539 | void ipwireless_tty_free(struct ipw_tty *tty) | |
540 | { | |
541 | int j; | |
542 | struct ipw_network *network = ttys[tty->index]->network; | |
543 | ||
544 | for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; | |
545 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) { | |
546 | struct ipw_tty *ttyj = ttys[j]; | |
547 | ||
548 | if (ttyj) { | |
549 | mutex_lock(&ttyj->ipw_tty_mutex); | |
e6df3cce JS |
550 | if (get_tty(j)) |
551 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
552 | ": deregistering %s device ttyIPWp%d\n", | |
553 | tty_type_name(ttyj->tty_type), j); | |
099dc4fb | 554 | ttyj->closing = 1; |
19ef1b71 | 555 | if (ttyj->port.tty != NULL) { |
099dc4fb | 556 | mutex_unlock(&ttyj->ipw_tty_mutex); |
19ef1b71 | 557 | tty_vhangup(ttyj->port.tty); |
5aaa70a8 AC |
558 | /* FIXME: Exactly how is the tty object locked here |
559 | against a parallel ioctl etc */ | |
de3a60a3 JS |
560 | /* FIXME2: hangup does not mean all processes |
561 | * are gone */ | |
099dc4fb DS |
562 | mutex_lock(&ttyj->ipw_tty_mutex); |
563 | } | |
7393af80 | 564 | while (ttyj->port.count) |
099dc4fb DS |
565 | do_ipw_close(ttyj); |
566 | ipwireless_disassociate_network_ttys(network, | |
567 | ttyj->channel_idx); | |
568 | tty_unregister_device(ipw_tty_driver, j); | |
569 | ttys[j] = NULL; | |
570 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
571 | kfree(ttyj); | |
572 | } | |
573 | } | |
574 | } | |
575 | ||
1cceefd3 | 576 | static const struct tty_operations tty_ops = { |
099dc4fb DS |
577 | .open = ipw_open, |
578 | .close = ipw_close, | |
579 | .hangup = ipw_hangup, | |
580 | .write = ipw_write, | |
581 | .write_room = ipw_write_room, | |
582 | .ioctl = ipw_ioctl, | |
583 | .chars_in_buffer = ipw_chars_in_buffer, | |
584 | .tiocmget = ipw_tiocmget, | |
585 | .tiocmset = ipw_tiocmset, | |
586 | }; | |
587 | ||
588 | int ipwireless_tty_init(void) | |
589 | { | |
590 | int result; | |
591 | ||
592 | ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); | |
593 | if (!ipw_tty_driver) | |
594 | return -ENOMEM; | |
595 | ||
099dc4fb DS |
596 | ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; |
597 | ipw_tty_driver->name = "ttyIPWp"; | |
598 | ipw_tty_driver->major = 0; | |
599 | ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; | |
600 | ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
601 | ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
602 | ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
603 | ipw_tty_driver->init_termios = tty_std_termios; | |
604 | ipw_tty_driver->init_termios.c_cflag = | |
605 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606 | ipw_tty_driver->init_termios.c_ispeed = 9600; | |
607 | ipw_tty_driver->init_termios.c_ospeed = 9600; | |
608 | tty_set_operations(ipw_tty_driver, &tty_ops); | |
609 | result = tty_register_driver(ipw_tty_driver); | |
610 | if (result) { | |
611 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
612 | ": failed to register tty driver\n"); | |
613 | put_tty_driver(ipw_tty_driver); | |
614 | return result; | |
615 | } | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | void ipwireless_tty_release(void) | |
621 | { | |
622 | int ret; | |
623 | ||
624 | ret = tty_unregister_driver(ipw_tty_driver); | |
625 | put_tty_driver(ipw_tty_driver); | |
626 | if (ret != 0) | |
627 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
628 | ": tty_unregister_driver failed with code %d\n", ret); | |
629 | } | |
630 | ||
631 | int ipwireless_tty_is_modem(struct ipw_tty *tty) | |
632 | { | |
633 | return tty->tty_type == TTYTYPE_MODEM; | |
634 | } | |
635 | ||
636 | void | |
637 | ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, | |
638 | unsigned int channel_idx, | |
639 | unsigned int control_lines, | |
640 | unsigned int changed_mask) | |
641 | { | |
642 | unsigned int old_control_lines = tty->control_lines; | |
643 | ||
644 | tty->control_lines = (tty->control_lines & ~changed_mask) | |
645 | | (control_lines & changed_mask); | |
646 | ||
647 | /* | |
648 | * If DCD is de-asserted, we close the tty so pppd can tell that we | |
649 | * have gone offline. | |
650 | */ | |
651 | if ((old_control_lines & IPW_CONTROL_LINE_DCD) | |
652 | && !(tty->control_lines & IPW_CONTROL_LINE_DCD) | |
19ef1b71 JS |
653 | && tty->port.tty) { |
654 | tty_hangup(tty->port.tty); | |
099dc4fb DS |
655 | } |
656 | } | |
657 |