Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
099dc4fb DS |
2 | /* |
3 | * IPWireless 3G PCMCIA Network Driver | |
4 | * | |
5 | * Original code | |
6 | * by Stephen Blackheath <stephen@blacksapphire.com>, | |
7 | * Ben Martel <benm@symmetric.co.nz> | |
8 | * | |
9 | * Copyrighted as follows: | |
10 | * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) | |
11 | * | |
12 | * Various driver changes and rewrites, port to new kernels | |
13 | * Copyright (C) 2006-2007 Jiri Kosina | |
14 | * | |
15 | * Misc code cleanups and updates | |
16 | * Copyright (C) 2007 David Sterba | |
17 | */ | |
18 | ||
099dc4fb DS |
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); | |
7393af80 | 97 | if (tty->port.count == 0) |
099dc4fb DS |
98 | tty->tx_bytes_queued = 0; |
99 | ||
7393af80 | 100 | tty->port.count++; |
099dc4fb | 101 | |
19ef1b71 | 102 | tty->port.tty = linux_tty; |
099dc4fb | 103 | linux_tty->driver_data = tty; |
d6c53c0e | 104 | tty->port.low_latency = 1; |
099dc4fb DS |
105 | |
106 | if (tty->tty_type == TTYTYPE_MODEM) | |
107 | ipwireless_ppp_open(tty->network); | |
108 | ||
109 | mutex_unlock(&tty->ipw_tty_mutex); | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static void do_ipw_close(struct ipw_tty *tty) | |
115 | { | |
7393af80 | 116 | tty->port.count--; |
099dc4fb | 117 | |
7393af80 | 118 | if (tty->port.count == 0) { |
19ef1b71 | 119 | struct tty_struct *linux_tty = tty->port.tty; |
099dc4fb DS |
120 | |
121 | if (linux_tty != NULL) { | |
19ef1b71 | 122 | tty->port.tty = NULL; |
099dc4fb DS |
123 | linux_tty->driver_data = NULL; |
124 | ||
125 | if (tty->tty_type == TTYTYPE_MODEM) | |
126 | ipwireless_ppp_close(tty->network); | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
131 | static void ipw_hangup(struct tty_struct *linux_tty) | |
132 | { | |
133 | struct ipw_tty *tty = linux_tty->driver_data; | |
134 | ||
135 | if (!tty) | |
136 | return; | |
137 | ||
138 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 139 | if (tty->port.count == 0) { |
099dc4fb DS |
140 | mutex_unlock(&tty->ipw_tty_mutex); |
141 | return; | |
142 | } | |
143 | ||
144 | do_ipw_close(tty); | |
145 | ||
146 | mutex_unlock(&tty->ipw_tty_mutex); | |
147 | } | |
148 | ||
149 | static void ipw_close(struct tty_struct *linux_tty, struct file *filp) | |
150 | { | |
151 | ipw_hangup(linux_tty); | |
152 | } | |
153 | ||
154 | /* Take data received from hardware, and send it out the tty */ | |
155 | void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, | |
156 | unsigned int length) | |
157 | { | |
099dc4fb DS |
158 | int work = 0; |
159 | ||
160 | mutex_lock(&tty->ipw_tty_mutex); | |
099dc4fb | 161 | |
7393af80 | 162 | if (!tty->port.count) { |
099dc4fb DS |
163 | mutex_unlock(&tty->ipw_tty_mutex); |
164 | return; | |
165 | } | |
166 | mutex_unlock(&tty->ipw_tty_mutex); | |
167 | ||
05c7cd39 | 168 | work = tty_insert_flip_string(&tty->port, data, length); |
099dc4fb DS |
169 | |
170 | if (work != length) | |
171 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
172 | ": %d chars not inserted to flip buffer!\n", | |
173 | length - work); | |
174 | ||
099dc4fb | 175 | if (work) |
2e124b4a | 176 | tty_flip_buffer_push(&tty->port); |
099dc4fb DS |
177 | } |
178 | ||
179 | static void ipw_write_packet_sent_callback(void *callback_data, | |
180 | unsigned int packet_length) | |
181 | { | |
182 | struct ipw_tty *tty = callback_data; | |
183 | ||
184 | /* | |
185 | * Packet has been sent, so we subtract the number of bytes from our | |
186 | * tally of outstanding TX bytes. | |
187 | */ | |
188 | tty->tx_bytes_queued -= packet_length; | |
189 | } | |
190 | ||
191 | static int ipw_write(struct tty_struct *linux_tty, | |
192 | const unsigned char *buf, int count) | |
193 | { | |
194 | struct ipw_tty *tty = linux_tty->driver_data; | |
195 | int room, ret; | |
196 | ||
197 | if (!tty) | |
198 | return -ENODEV; | |
199 | ||
200 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 201 | if (!tty->port.count) { |
099dc4fb DS |
202 | mutex_unlock(&tty->ipw_tty_mutex); |
203 | return -EINVAL; | |
204 | } | |
205 | ||
206 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
207 | if (room < 0) | |
208 | room = 0; | |
209 | /* Don't allow caller to write any more than we have room for */ | |
210 | if (count > room) | |
211 | count = room; | |
212 | ||
213 | if (count == 0) { | |
214 | mutex_unlock(&tty->ipw_tty_mutex); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, | |
ff3e990e | 219 | buf, count, |
099dc4fb DS |
220 | ipw_write_packet_sent_callback, tty); |
221 | if (ret == -1) { | |
222 | mutex_unlock(&tty->ipw_tty_mutex); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | tty->tx_bytes_queued += count; | |
227 | mutex_unlock(&tty->ipw_tty_mutex); | |
228 | ||
229 | return count; | |
230 | } | |
231 | ||
232 | static int ipw_write_room(struct tty_struct *linux_tty) | |
233 | { | |
234 | struct ipw_tty *tty = linux_tty->driver_data; | |
235 | int room; | |
236 | ||
5aaa70a8 | 237 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
238 | if (!tty) |
239 | return -ENODEV; | |
240 | ||
7393af80 | 241 | if (!tty->port.count) |
099dc4fb DS |
242 | return -EINVAL; |
243 | ||
244 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
245 | if (room < 0) | |
246 | room = 0; | |
247 | ||
248 | return room; | |
249 | } | |
250 | ||
a7b06fcf AV |
251 | static int ipwireless_get_serial_info(struct tty_struct *linux_tty, |
252 | struct serial_struct *ss) | |
099dc4fb | 253 | { |
a7b06fcf | 254 | struct ipw_tty *tty = linux_tty->driver_data; |
099dc4fb | 255 | |
a7b06fcf AV |
256 | if (!tty) |
257 | return -ENODEV; | |
fec4daec | 258 | |
a7b06fcf AV |
259 | if (!tty->port.count) |
260 | return -EINVAL; | |
099dc4fb | 261 | |
a7b06fcf AV |
262 | ss->type = PORT_UNKNOWN; |
263 | ss->line = tty->index; | |
264 | ss->baud_base = 115200; | |
099dc4fb DS |
265 | return 0; |
266 | } | |
267 | ||
a7b06fcf AV |
268 | static int ipwireless_set_serial_info(struct tty_struct *linux_tty, |
269 | struct serial_struct *ss) | |
270 | { | |
271 | return 0; /* Keeps the PCMCIA scripts happy. */ | |
272 | } | |
273 | ||
099dc4fb DS |
274 | static int ipw_chars_in_buffer(struct tty_struct *linux_tty) |
275 | { | |
276 | struct ipw_tty *tty = linux_tty->driver_data; | |
277 | ||
278 | if (!tty) | |
23198fda | 279 | return 0; |
099dc4fb | 280 | |
7393af80 | 281 | if (!tty->port.count) |
23198fda | 282 | return 0; |
099dc4fb DS |
283 | |
284 | return tty->tx_bytes_queued; | |
285 | } | |
286 | ||
287 | static int get_control_lines(struct ipw_tty *tty) | |
288 | { | |
289 | unsigned int my = tty->control_lines; | |
290 | unsigned int out = 0; | |
291 | ||
292 | if (my & IPW_CONTROL_LINE_RTS) | |
293 | out |= TIOCM_RTS; | |
294 | if (my & IPW_CONTROL_LINE_DTR) | |
295 | out |= TIOCM_DTR; | |
296 | if (my & IPW_CONTROL_LINE_CTS) | |
297 | out |= TIOCM_CTS; | |
298 | if (my & IPW_CONTROL_LINE_DSR) | |
299 | out |= TIOCM_DSR; | |
300 | if (my & IPW_CONTROL_LINE_DCD) | |
301 | out |= TIOCM_CD; | |
302 | ||
303 | return out; | |
304 | } | |
305 | ||
306 | static int set_control_lines(struct ipw_tty *tty, unsigned int set, | |
307 | unsigned int clear) | |
308 | { | |
309 | int ret; | |
310 | ||
311 | if (set & TIOCM_RTS) { | |
312 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1); | |
313 | if (ret) | |
314 | return ret; | |
315 | if (tty->secondary_channel_idx != -1) { | |
316 | ret = ipwireless_set_RTS(tty->hardware, | |
317 | tty->secondary_channel_idx, 1); | |
318 | if (ret) | |
319 | return ret; | |
320 | } | |
321 | } | |
322 | if (set & TIOCM_DTR) { | |
323 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1); | |
324 | if (ret) | |
325 | return ret; | |
326 | if (tty->secondary_channel_idx != -1) { | |
327 | ret = ipwireless_set_DTR(tty->hardware, | |
328 | tty->secondary_channel_idx, 1); | |
329 | if (ret) | |
330 | return ret; | |
331 | } | |
332 | } | |
333 | if (clear & TIOCM_RTS) { | |
334 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0); | |
335 | if (tty->secondary_channel_idx != -1) { | |
336 | ret = ipwireless_set_RTS(tty->hardware, | |
337 | tty->secondary_channel_idx, 0); | |
338 | if (ret) | |
339 | return ret; | |
340 | } | |
341 | } | |
342 | if (clear & TIOCM_DTR) { | |
343 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0); | |
344 | if (tty->secondary_channel_idx != -1) { | |
345 | ret = ipwireless_set_DTR(tty->hardware, | |
346 | tty->secondary_channel_idx, 0); | |
347 | if (ret) | |
348 | return ret; | |
349 | } | |
350 | } | |
351 | return 0; | |
352 | } | |
353 | ||
60b33c13 | 354 | static int ipw_tiocmget(struct tty_struct *linux_tty) |
099dc4fb DS |
355 | { |
356 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 357 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
358 | |
359 | if (!tty) | |
360 | return -ENODEV; | |
361 | ||
7393af80 | 362 | if (!tty->port.count) |
099dc4fb DS |
363 | return -EINVAL; |
364 | ||
365 | return get_control_lines(tty); | |
366 | } | |
367 | ||
368 | static int | |
20b9d177 | 369 | ipw_tiocmset(struct tty_struct *linux_tty, |
099dc4fb DS |
370 | unsigned int set, unsigned int clear) |
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 set_control_lines(tty, set, clear); | |
382 | } | |
383 | ||
6caa76b7 | 384 | static int ipw_ioctl(struct tty_struct *linux_tty, |
099dc4fb DS |
385 | unsigned int cmd, unsigned long arg) |
386 | { | |
387 | struct ipw_tty *tty = linux_tty->driver_data; | |
388 | ||
389 | if (!tty) | |
390 | return -ENODEV; | |
391 | ||
7393af80 | 392 | if (!tty->port.count) |
099dc4fb DS |
393 | return -EINVAL; |
394 | ||
5aaa70a8 | 395 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
396 | if (tty->tty_type == TTYTYPE_MODEM) { |
397 | switch (cmd) { | |
398 | case PPPIOCGCHAN: | |
399 | { | |
400 | int chan = ipwireless_ppp_channel_index( | |
401 | tty->network); | |
402 | ||
403 | if (chan < 0) | |
404 | return -ENODEV; | |
405 | if (put_user(chan, (int __user *) arg)) | |
406 | return -EFAULT; | |
407 | } | |
408 | return 0; | |
409 | ||
410 | case PPPIOCGUNIT: | |
411 | { | |
412 | int unit = ipwireless_ppp_unit_number( | |
413 | tty->network); | |
414 | ||
415 | if (unit < 0) | |
416 | return -ENODEV; | |
417 | if (put_user(unit, (int __user *) arg)) | |
418 | return -EFAULT; | |
419 | } | |
420 | return 0; | |
421 | ||
099dc4fb DS |
422 | case FIONREAD: |
423 | { | |
424 | int val = 0; | |
425 | ||
426 | if (put_user(val, (int __user *) arg)) | |
427 | return -EFAULT; | |
428 | } | |
429 | return 0; | |
5aaa70a8 AC |
430 | case TCFLSH: |
431 | return tty_perform_flush(linux_tty, arg); | |
099dc4fb DS |
432 | } |
433 | } | |
6caa76b7 | 434 | return -ENOIOCTLCMD; |
099dc4fb DS |
435 | } |
436 | ||
b498ada6 | 437 | static int add_tty(int j, |
099dc4fb DS |
438 | struct ipw_hardware *hardware, |
439 | struct ipw_network *network, int channel_idx, | |
440 | int secondary_channel_idx, int tty_type) | |
441 | { | |
442 | ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); | |
443 | if (!ttys[j]) | |
444 | return -ENOMEM; | |
445 | ttys[j]->index = j; | |
446 | ttys[j]->hardware = hardware; | |
447 | ttys[j]->channel_idx = channel_idx; | |
448 | ttys[j]->secondary_channel_idx = secondary_channel_idx; | |
449 | ttys[j]->network = network; | |
450 | ttys[j]->tty_type = tty_type; | |
451 | mutex_init(&ttys[j]->ipw_tty_mutex); | |
7393af80 | 452 | tty_port_init(&ttys[j]->port); |
099dc4fb | 453 | |
734cc178 | 454 | tty_port_register_device(&ttys[j]->port, ipw_tty_driver, j, NULL); |
099dc4fb DS |
455 | ipwireless_associate_network_tty(network, channel_idx, ttys[j]); |
456 | ||
457 | if (secondary_channel_idx != -1) | |
458 | ipwireless_associate_network_tty(network, | |
459 | secondary_channel_idx, | |
460 | ttys[j]); | |
e6df3cce JS |
461 | /* check if we provide raw device (if loopback is enabled) */ |
462 | if (get_tty(j)) | |
463 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
464 | ": registering %s device ttyIPWp%d\n", | |
465 | tty_type_name(tty_type), j); | |
466 | ||
099dc4fb DS |
467 | return 0; |
468 | } | |
469 | ||
470 | struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, | |
b498ada6 | 471 | struct ipw_network *network) |
099dc4fb DS |
472 | { |
473 | int i, j; | |
474 | ||
475 | for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { | |
476 | int allfree = 1; | |
477 | ||
478 | for (j = i; j < IPWIRELESS_PCMCIA_MINORS; | |
479 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) | |
480 | if (ttys[j] != NULL) { | |
481 | allfree = 0; | |
482 | break; | |
483 | } | |
484 | ||
485 | if (allfree) { | |
486 | j = i; | |
487 | ||
b498ada6 | 488 | if (add_tty(j, hardware, network, |
099dc4fb DS |
489 | IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, |
490 | TTYTYPE_MODEM)) | |
491 | return NULL; | |
492 | ||
493 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 494 | if (add_tty(j, hardware, network, |
099dc4fb DS |
495 | IPW_CHANNEL_DIALLER, -1, |
496 | TTYTYPE_MONITOR)) | |
497 | return NULL; | |
498 | ||
499 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 500 | if (add_tty(j, hardware, network, |
099dc4fb DS |
501 | IPW_CHANNEL_RAS, -1, |
502 | TTYTYPE_RAS_RAW)) | |
503 | return NULL; | |
504 | ||
099dc4fb DS |
505 | return ttys[i]; |
506 | } | |
507 | } | |
508 | return NULL; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Must be called before ipwireless_network_free(). | |
513 | */ | |
514 | void ipwireless_tty_free(struct ipw_tty *tty) | |
515 | { | |
516 | int j; | |
517 | struct ipw_network *network = ttys[tty->index]->network; | |
518 | ||
519 | for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; | |
520 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) { | |
521 | struct ipw_tty *ttyj = ttys[j]; | |
522 | ||
523 | if (ttyj) { | |
524 | mutex_lock(&ttyj->ipw_tty_mutex); | |
e6df3cce JS |
525 | if (get_tty(j)) |
526 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
527 | ": deregistering %s device ttyIPWp%d\n", | |
528 | tty_type_name(ttyj->tty_type), j); | |
099dc4fb | 529 | ttyj->closing = 1; |
19ef1b71 | 530 | if (ttyj->port.tty != NULL) { |
099dc4fb | 531 | mutex_unlock(&ttyj->ipw_tty_mutex); |
19ef1b71 | 532 | tty_vhangup(ttyj->port.tty); |
5aaa70a8 AC |
533 | /* FIXME: Exactly how is the tty object locked here |
534 | against a parallel ioctl etc */ | |
de3a60a3 JS |
535 | /* FIXME2: hangup does not mean all processes |
536 | * are gone */ | |
099dc4fb DS |
537 | mutex_lock(&ttyj->ipw_tty_mutex); |
538 | } | |
7393af80 | 539 | while (ttyj->port.count) |
099dc4fb DS |
540 | do_ipw_close(ttyj); |
541 | ipwireless_disassociate_network_ttys(network, | |
542 | ttyj->channel_idx); | |
543 | tty_unregister_device(ipw_tty_driver, j); | |
191c5f10 | 544 | tty_port_destroy(&ttyj->port); |
099dc4fb DS |
545 | ttys[j] = NULL; |
546 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
547 | kfree(ttyj); | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
1cceefd3 | 552 | static const struct tty_operations tty_ops = { |
099dc4fb DS |
553 | .open = ipw_open, |
554 | .close = ipw_close, | |
555 | .hangup = ipw_hangup, | |
556 | .write = ipw_write, | |
557 | .write_room = ipw_write_room, | |
558 | .ioctl = ipw_ioctl, | |
559 | .chars_in_buffer = ipw_chars_in_buffer, | |
560 | .tiocmget = ipw_tiocmget, | |
561 | .tiocmset = ipw_tiocmset, | |
a7b06fcf AV |
562 | .set_serial = ipwireless_set_serial_info, |
563 | .get_serial = ipwireless_get_serial_info, | |
099dc4fb DS |
564 | }; |
565 | ||
566 | int ipwireless_tty_init(void) | |
567 | { | |
568 | int result; | |
569 | ||
570 | ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); | |
571 | if (!ipw_tty_driver) | |
572 | return -ENOMEM; | |
573 | ||
099dc4fb DS |
574 | ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; |
575 | ipw_tty_driver->name = "ttyIPWp"; | |
576 | ipw_tty_driver->major = 0; | |
577 | ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; | |
578 | ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
579 | ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
580 | ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
581 | ipw_tty_driver->init_termios = tty_std_termios; | |
582 | ipw_tty_driver->init_termios.c_cflag = | |
583 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
584 | ipw_tty_driver->init_termios.c_ispeed = 9600; | |
585 | ipw_tty_driver->init_termios.c_ospeed = 9600; | |
586 | tty_set_operations(ipw_tty_driver, &tty_ops); | |
587 | result = tty_register_driver(ipw_tty_driver); | |
588 | if (result) { | |
589 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
590 | ": failed to register tty driver\n"); | |
591 | put_tty_driver(ipw_tty_driver); | |
592 | return result; | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | void ipwireless_tty_release(void) | |
599 | { | |
600 | int ret; | |
601 | ||
602 | ret = tty_unregister_driver(ipw_tty_driver); | |
603 | put_tty_driver(ipw_tty_driver); | |
604 | if (ret != 0) | |
605 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
606 | ": tty_unregister_driver failed with code %d\n", ret); | |
607 | } | |
608 | ||
609 | int ipwireless_tty_is_modem(struct ipw_tty *tty) | |
610 | { | |
611 | return tty->tty_type == TTYTYPE_MODEM; | |
612 | } | |
613 | ||
614 | void | |
615 | ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, | |
616 | unsigned int channel_idx, | |
617 | unsigned int control_lines, | |
618 | unsigned int changed_mask) | |
619 | { | |
620 | unsigned int old_control_lines = tty->control_lines; | |
621 | ||
622 | tty->control_lines = (tty->control_lines & ~changed_mask) | |
623 | | (control_lines & changed_mask); | |
624 | ||
625 | /* | |
626 | * If DCD is de-asserted, we close the tty so pppd can tell that we | |
627 | * have gone offline. | |
628 | */ | |
629 | if ((old_control_lines & IPW_CONTROL_LINE_DCD) | |
630 | && !(tty->control_lines & IPW_CONTROL_LINE_DCD) | |
19ef1b71 JS |
631 | && tty->port.tty) { |
632 | tty_hangup(tty->port.tty); | |
099dc4fb DS |
633 | } |
634 | } | |
635 |