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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 | ||
099dc4fb DS |
18 | #include <linux/kernel.h> |
19 | #include <linux/module.h> | |
20 | #include <linux/mutex.h> | |
21 | #include <linux/ppp_defs.h> | |
22 | #include <linux/if.h> | |
4b32da2b | 23 | #include <linux/ppp-ioctl.h> |
099dc4fb DS |
24 | #include <linux/sched.h> |
25 | #include <linux/serial.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/uaccess.h> | |
099dc4fb DS |
31 | |
32 | #include "tty.h" | |
33 | #include "network.h" | |
34 | #include "hardware.h" | |
35 | #include "main.h" | |
36 | ||
37 | #define IPWIRELESS_PCMCIA_START (0) | |
38 | #define IPWIRELESS_PCMCIA_MINORS (24) | |
39 | #define IPWIRELESS_PCMCIA_MINOR_RANGE (8) | |
40 | ||
41 | #define TTYTYPE_MODEM (0) | |
42 | #define TTYTYPE_MONITOR (1) | |
43 | #define TTYTYPE_RAS_RAW (2) | |
44 | ||
45 | struct ipw_tty { | |
7393af80 | 46 | struct tty_port port; |
099dc4fb DS |
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; | |
099dc4fb DS |
53 | unsigned int control_lines; |
54 | struct mutex ipw_tty_mutex; | |
55 | int tx_bytes_queued; | |
56 | int closing; | |
57 | }; | |
58 | ||
59 | static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS]; | |
60 | ||
61 | static struct tty_driver *ipw_tty_driver; | |
62 | ||
63 | static char *tty_type_name(int tty_type) | |
64 | { | |
65 | static char *channel_names[] = { | |
66 | "modem", | |
67 | "monitor", | |
68 | "RAS-raw" | |
69 | }; | |
70 | ||
71 | return channel_names[tty_type]; | |
72 | } | |
73 | ||
ecaa3bda | 74 | static struct ipw_tty *get_tty(int index) |
099dc4fb | 75 | { |
ecaa3bda JS |
76 | /* |
77 | * The 'ras_raw' channel is only available when 'loopback' mode | |
78 | * is enabled. | |
79 | * Number of minor starts with 16 (_RANGE * _RAS_RAW). | |
80 | */ | |
81 | if (!ipwireless_loopback && index >= | |
82 | IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW) | |
099dc4fb | 83 | return NULL; |
ecaa3bda JS |
84 | |
85 | return ttys[index]; | |
099dc4fb DS |
86 | } |
87 | ||
88 | static int ipw_open(struct tty_struct *linux_tty, struct file *filp) | |
89 | { | |
ecaa3bda | 90 | struct ipw_tty *tty = get_tty(linux_tty->index); |
099dc4fb DS |
91 | |
92 | if (!tty) | |
93 | return -ENODEV; | |
94 | ||
95 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 96 | if (tty->port.count == 0) |
099dc4fb DS |
97 | tty->tx_bytes_queued = 0; |
98 | ||
7393af80 | 99 | tty->port.count++; |
099dc4fb | 100 | |
19ef1b71 | 101 | tty->port.tty = linux_tty; |
099dc4fb | 102 | linux_tty->driver_data = tty; |
d6c53c0e | 103 | tty->port.low_latency = 1; |
099dc4fb DS |
104 | |
105 | if (tty->tty_type == TTYTYPE_MODEM) | |
106 | ipwireless_ppp_open(tty->network); | |
107 | ||
108 | mutex_unlock(&tty->ipw_tty_mutex); | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static void do_ipw_close(struct ipw_tty *tty) | |
114 | { | |
7393af80 | 115 | tty->port.count--; |
099dc4fb | 116 | |
7393af80 | 117 | if (tty->port.count == 0) { |
19ef1b71 | 118 | struct tty_struct *linux_tty = tty->port.tty; |
099dc4fb DS |
119 | |
120 | if (linux_tty != NULL) { | |
19ef1b71 | 121 | tty->port.tty = NULL; |
099dc4fb DS |
122 | linux_tty->driver_data = NULL; |
123 | ||
124 | if (tty->tty_type == TTYTYPE_MODEM) | |
125 | ipwireless_ppp_close(tty->network); | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
130 | static void ipw_hangup(struct tty_struct *linux_tty) | |
131 | { | |
132 | struct ipw_tty *tty = linux_tty->driver_data; | |
133 | ||
134 | if (!tty) | |
135 | return; | |
136 | ||
137 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 138 | if (tty->port.count == 0) { |
099dc4fb DS |
139 | mutex_unlock(&tty->ipw_tty_mutex); |
140 | return; | |
141 | } | |
142 | ||
143 | do_ipw_close(tty); | |
144 | ||
145 | mutex_unlock(&tty->ipw_tty_mutex); | |
146 | } | |
147 | ||
148 | static void ipw_close(struct tty_struct *linux_tty, struct file *filp) | |
149 | { | |
150 | ipw_hangup(linux_tty); | |
151 | } | |
152 | ||
153 | /* Take data received from hardware, and send it out the tty */ | |
154 | void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, | |
155 | unsigned int length) | |
156 | { | |
099dc4fb DS |
157 | int work = 0; |
158 | ||
159 | mutex_lock(&tty->ipw_tty_mutex); | |
099dc4fb | 160 | |
7393af80 | 161 | if (!tty->port.count) { |
099dc4fb DS |
162 | mutex_unlock(&tty->ipw_tty_mutex); |
163 | return; | |
164 | } | |
165 | mutex_unlock(&tty->ipw_tty_mutex); | |
166 | ||
05c7cd39 | 167 | work = tty_insert_flip_string(&tty->port, data, length); |
099dc4fb DS |
168 | |
169 | if (work != length) | |
170 | printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME | |
171 | ": %d chars not inserted to flip buffer!\n", | |
172 | length - work); | |
173 | ||
099dc4fb | 174 | if (work) |
2e124b4a | 175 | tty_flip_buffer_push(&tty->port); |
099dc4fb DS |
176 | } |
177 | ||
178 | static void ipw_write_packet_sent_callback(void *callback_data, | |
179 | unsigned int packet_length) | |
180 | { | |
181 | struct ipw_tty *tty = callback_data; | |
182 | ||
183 | /* | |
184 | * Packet has been sent, so we subtract the number of bytes from our | |
185 | * tally of outstanding TX bytes. | |
186 | */ | |
187 | tty->tx_bytes_queued -= packet_length; | |
188 | } | |
189 | ||
190 | static int ipw_write(struct tty_struct *linux_tty, | |
191 | const unsigned char *buf, int count) | |
192 | { | |
193 | struct ipw_tty *tty = linux_tty->driver_data; | |
194 | int room, ret; | |
195 | ||
196 | if (!tty) | |
197 | return -ENODEV; | |
198 | ||
199 | mutex_lock(&tty->ipw_tty_mutex); | |
7393af80 | 200 | if (!tty->port.count) { |
099dc4fb DS |
201 | mutex_unlock(&tty->ipw_tty_mutex); |
202 | return -EINVAL; | |
203 | } | |
204 | ||
205 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
206 | if (room < 0) | |
207 | room = 0; | |
208 | /* Don't allow caller to write any more than we have room for */ | |
209 | if (count > room) | |
210 | count = room; | |
211 | ||
212 | if (count == 0) { | |
213 | mutex_unlock(&tty->ipw_tty_mutex); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, | |
ff3e990e | 218 | buf, count, |
099dc4fb DS |
219 | ipw_write_packet_sent_callback, tty); |
220 | if (ret == -1) { | |
221 | mutex_unlock(&tty->ipw_tty_mutex); | |
222 | return 0; | |
223 | } | |
224 | ||
225 | tty->tx_bytes_queued += count; | |
226 | mutex_unlock(&tty->ipw_tty_mutex); | |
227 | ||
228 | return count; | |
229 | } | |
230 | ||
231 | static int ipw_write_room(struct tty_struct *linux_tty) | |
232 | { | |
233 | struct ipw_tty *tty = linux_tty->driver_data; | |
234 | int room; | |
235 | ||
5aaa70a8 | 236 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
237 | if (!tty) |
238 | return -ENODEV; | |
239 | ||
7393af80 | 240 | if (!tty->port.count) |
099dc4fb DS |
241 | return -EINVAL; |
242 | ||
243 | room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; | |
244 | if (room < 0) | |
245 | room = 0; | |
246 | ||
247 | return room; | |
248 | } | |
249 | ||
250 | static int ipwireless_get_serial_info(struct ipw_tty *tty, | |
251 | struct serial_struct __user *retinfo) | |
252 | { | |
253 | struct serial_struct tmp; | |
254 | ||
255 | if (!retinfo) | |
256 | return (-EFAULT); | |
257 | ||
258 | memset(&tmp, 0, sizeof(tmp)); | |
259 | tmp.type = PORT_UNKNOWN; | |
260 | tmp.line = tty->index; | |
261 | tmp.port = 0; | |
262 | tmp.irq = 0; | |
263 | tmp.flags = 0; | |
264 | tmp.baud_base = 115200; | |
265 | tmp.close_delay = 0; | |
266 | tmp.closing_wait = 0; | |
267 | tmp.custom_divisor = 0; | |
268 | tmp.hub6 = 0; | |
269 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
270 | return -EFAULT; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static int ipw_chars_in_buffer(struct tty_struct *linux_tty) | |
276 | { | |
277 | struct ipw_tty *tty = linux_tty->driver_data; | |
278 | ||
279 | if (!tty) | |
23198fda | 280 | return 0; |
099dc4fb | 281 | |
7393af80 | 282 | if (!tty->port.count) |
23198fda | 283 | return 0; |
099dc4fb DS |
284 | |
285 | return tty->tx_bytes_queued; | |
286 | } | |
287 | ||
288 | static int get_control_lines(struct ipw_tty *tty) | |
289 | { | |
290 | unsigned int my = tty->control_lines; | |
291 | unsigned int out = 0; | |
292 | ||
293 | if (my & IPW_CONTROL_LINE_RTS) | |
294 | out |= TIOCM_RTS; | |
295 | if (my & IPW_CONTROL_LINE_DTR) | |
296 | out |= TIOCM_DTR; | |
297 | if (my & IPW_CONTROL_LINE_CTS) | |
298 | out |= TIOCM_CTS; | |
299 | if (my & IPW_CONTROL_LINE_DSR) | |
300 | out |= TIOCM_DSR; | |
301 | if (my & IPW_CONTROL_LINE_DCD) | |
302 | out |= TIOCM_CD; | |
303 | ||
304 | return out; | |
305 | } | |
306 | ||
307 | static int set_control_lines(struct ipw_tty *tty, unsigned int set, | |
308 | unsigned int clear) | |
309 | { | |
310 | int ret; | |
311 | ||
312 | if (set & TIOCM_RTS) { | |
313 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1); | |
314 | if (ret) | |
315 | return ret; | |
316 | if (tty->secondary_channel_idx != -1) { | |
317 | ret = ipwireless_set_RTS(tty->hardware, | |
318 | tty->secondary_channel_idx, 1); | |
319 | if (ret) | |
320 | return ret; | |
321 | } | |
322 | } | |
323 | if (set & TIOCM_DTR) { | |
324 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1); | |
325 | if (ret) | |
326 | return ret; | |
327 | if (tty->secondary_channel_idx != -1) { | |
328 | ret = ipwireless_set_DTR(tty->hardware, | |
329 | tty->secondary_channel_idx, 1); | |
330 | if (ret) | |
331 | return ret; | |
332 | } | |
333 | } | |
334 | if (clear & TIOCM_RTS) { | |
335 | ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0); | |
336 | if (tty->secondary_channel_idx != -1) { | |
337 | ret = ipwireless_set_RTS(tty->hardware, | |
338 | tty->secondary_channel_idx, 0); | |
339 | if (ret) | |
340 | return ret; | |
341 | } | |
342 | } | |
343 | if (clear & TIOCM_DTR) { | |
344 | ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0); | |
345 | if (tty->secondary_channel_idx != -1) { | |
346 | ret = ipwireless_set_DTR(tty->hardware, | |
347 | tty->secondary_channel_idx, 0); | |
348 | if (ret) | |
349 | return ret; | |
350 | } | |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
60b33c13 | 355 | static int ipw_tiocmget(struct tty_struct *linux_tty) |
099dc4fb DS |
356 | { |
357 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 358 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
359 | |
360 | if (!tty) | |
361 | return -ENODEV; | |
362 | ||
7393af80 | 363 | if (!tty->port.count) |
099dc4fb DS |
364 | return -EINVAL; |
365 | ||
366 | return get_control_lines(tty); | |
367 | } | |
368 | ||
369 | static int | |
20b9d177 | 370 | ipw_tiocmset(struct tty_struct *linux_tty, |
099dc4fb DS |
371 | unsigned int set, unsigned int clear) |
372 | { | |
373 | struct ipw_tty *tty = linux_tty->driver_data; | |
5aaa70a8 | 374 | /* FIXME: Exactly how is the tty object locked here .. */ |
099dc4fb DS |
375 | |
376 | if (!tty) | |
377 | return -ENODEV; | |
378 | ||
7393af80 | 379 | if (!tty->port.count) |
099dc4fb DS |
380 | return -EINVAL; |
381 | ||
382 | return set_control_lines(tty, set, clear); | |
383 | } | |
384 | ||
6caa76b7 | 385 | static int ipw_ioctl(struct tty_struct *linux_tty, |
099dc4fb DS |
386 | unsigned int cmd, unsigned long arg) |
387 | { | |
388 | struct ipw_tty *tty = linux_tty->driver_data; | |
389 | ||
390 | if (!tty) | |
391 | return -ENODEV; | |
392 | ||
7393af80 | 393 | if (!tty->port.count) |
099dc4fb DS |
394 | return -EINVAL; |
395 | ||
5aaa70a8 AC |
396 | /* FIXME: Exactly how is the tty object locked here .. */ |
397 | ||
099dc4fb DS |
398 | switch (cmd) { |
399 | case TIOCGSERIAL: | |
400 | return ipwireless_get_serial_info(tty, (void __user *) arg); | |
401 | ||
402 | case TIOCSSERIAL: | |
403 | return 0; /* Keeps the PCMCIA scripts happy. */ | |
404 | } | |
405 | ||
406 | if (tty->tty_type == TTYTYPE_MODEM) { | |
407 | switch (cmd) { | |
408 | case PPPIOCGCHAN: | |
409 | { | |
410 | int chan = ipwireless_ppp_channel_index( | |
411 | tty->network); | |
412 | ||
413 | if (chan < 0) | |
414 | return -ENODEV; | |
415 | if (put_user(chan, (int __user *) arg)) | |
416 | return -EFAULT; | |
417 | } | |
418 | return 0; | |
419 | ||
420 | case PPPIOCGUNIT: | |
421 | { | |
422 | int unit = ipwireless_ppp_unit_number( | |
423 | tty->network); | |
424 | ||
425 | if (unit < 0) | |
426 | return -ENODEV; | |
427 | if (put_user(unit, (int __user *) arg)) | |
428 | return -EFAULT; | |
429 | } | |
430 | return 0; | |
431 | ||
099dc4fb DS |
432 | case FIONREAD: |
433 | { | |
434 | int val = 0; | |
435 | ||
436 | if (put_user(val, (int __user *) arg)) | |
437 | return -EFAULT; | |
438 | } | |
439 | return 0; | |
5aaa70a8 AC |
440 | case TCFLSH: |
441 | return tty_perform_flush(linux_tty, arg); | |
099dc4fb DS |
442 | } |
443 | } | |
6caa76b7 | 444 | return -ENOIOCTLCMD; |
099dc4fb DS |
445 | } |
446 | ||
b498ada6 | 447 | static int add_tty(int j, |
099dc4fb DS |
448 | struct ipw_hardware *hardware, |
449 | struct ipw_network *network, int channel_idx, | |
450 | int secondary_channel_idx, int tty_type) | |
451 | { | |
452 | ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); | |
453 | if (!ttys[j]) | |
454 | return -ENOMEM; | |
455 | ttys[j]->index = j; | |
456 | ttys[j]->hardware = hardware; | |
457 | ttys[j]->channel_idx = channel_idx; | |
458 | ttys[j]->secondary_channel_idx = secondary_channel_idx; | |
459 | ttys[j]->network = network; | |
460 | ttys[j]->tty_type = tty_type; | |
461 | mutex_init(&ttys[j]->ipw_tty_mutex); | |
7393af80 | 462 | tty_port_init(&ttys[j]->port); |
099dc4fb | 463 | |
734cc178 | 464 | tty_port_register_device(&ttys[j]->port, ipw_tty_driver, j, NULL); |
099dc4fb DS |
465 | ipwireless_associate_network_tty(network, channel_idx, ttys[j]); |
466 | ||
467 | if (secondary_channel_idx != -1) | |
468 | ipwireless_associate_network_tty(network, | |
469 | secondary_channel_idx, | |
470 | ttys[j]); | |
e6df3cce JS |
471 | /* check if we provide raw device (if loopback is enabled) */ |
472 | if (get_tty(j)) | |
473 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
474 | ": registering %s device ttyIPWp%d\n", | |
475 | tty_type_name(tty_type), j); | |
476 | ||
099dc4fb DS |
477 | return 0; |
478 | } | |
479 | ||
480 | struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, | |
b498ada6 | 481 | struct ipw_network *network) |
099dc4fb DS |
482 | { |
483 | int i, j; | |
484 | ||
485 | for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { | |
486 | int allfree = 1; | |
487 | ||
488 | for (j = i; j < IPWIRELESS_PCMCIA_MINORS; | |
489 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) | |
490 | if (ttys[j] != NULL) { | |
491 | allfree = 0; | |
492 | break; | |
493 | } | |
494 | ||
495 | if (allfree) { | |
496 | j = i; | |
497 | ||
b498ada6 | 498 | if (add_tty(j, hardware, network, |
099dc4fb DS |
499 | IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, |
500 | TTYTYPE_MODEM)) | |
501 | return NULL; | |
502 | ||
503 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 504 | if (add_tty(j, hardware, network, |
099dc4fb DS |
505 | IPW_CHANNEL_DIALLER, -1, |
506 | TTYTYPE_MONITOR)) | |
507 | return NULL; | |
508 | ||
509 | j += IPWIRELESS_PCMCIA_MINOR_RANGE; | |
b498ada6 | 510 | if (add_tty(j, hardware, network, |
099dc4fb DS |
511 | IPW_CHANNEL_RAS, -1, |
512 | TTYTYPE_RAS_RAW)) | |
513 | return NULL; | |
514 | ||
099dc4fb DS |
515 | return ttys[i]; |
516 | } | |
517 | } | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Must be called before ipwireless_network_free(). | |
523 | */ | |
524 | void ipwireless_tty_free(struct ipw_tty *tty) | |
525 | { | |
526 | int j; | |
527 | struct ipw_network *network = ttys[tty->index]->network; | |
528 | ||
529 | for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; | |
530 | j += IPWIRELESS_PCMCIA_MINOR_RANGE) { | |
531 | struct ipw_tty *ttyj = ttys[j]; | |
532 | ||
533 | if (ttyj) { | |
534 | mutex_lock(&ttyj->ipw_tty_mutex); | |
e6df3cce JS |
535 | if (get_tty(j)) |
536 | printk(KERN_INFO IPWIRELESS_PCCARD_NAME | |
537 | ": deregistering %s device ttyIPWp%d\n", | |
538 | tty_type_name(ttyj->tty_type), j); | |
099dc4fb | 539 | ttyj->closing = 1; |
19ef1b71 | 540 | if (ttyj->port.tty != NULL) { |
099dc4fb | 541 | mutex_unlock(&ttyj->ipw_tty_mutex); |
19ef1b71 | 542 | tty_vhangup(ttyj->port.tty); |
5aaa70a8 AC |
543 | /* FIXME: Exactly how is the tty object locked here |
544 | against a parallel ioctl etc */ | |
de3a60a3 JS |
545 | /* FIXME2: hangup does not mean all processes |
546 | * are gone */ | |
099dc4fb DS |
547 | mutex_lock(&ttyj->ipw_tty_mutex); |
548 | } | |
7393af80 | 549 | while (ttyj->port.count) |
099dc4fb DS |
550 | do_ipw_close(ttyj); |
551 | ipwireless_disassociate_network_ttys(network, | |
552 | ttyj->channel_idx); | |
553 | tty_unregister_device(ipw_tty_driver, j); | |
191c5f10 | 554 | tty_port_destroy(&ttyj->port); |
099dc4fb DS |
555 | ttys[j] = NULL; |
556 | mutex_unlock(&ttyj->ipw_tty_mutex); | |
557 | kfree(ttyj); | |
558 | } | |
559 | } | |
560 | } | |
561 | ||
1cceefd3 | 562 | static const struct tty_operations tty_ops = { |
099dc4fb DS |
563 | .open = ipw_open, |
564 | .close = ipw_close, | |
565 | .hangup = ipw_hangup, | |
566 | .write = ipw_write, | |
567 | .write_room = ipw_write_room, | |
568 | .ioctl = ipw_ioctl, | |
569 | .chars_in_buffer = ipw_chars_in_buffer, | |
570 | .tiocmget = ipw_tiocmget, | |
571 | .tiocmset = ipw_tiocmset, | |
572 | }; | |
573 | ||
574 | int ipwireless_tty_init(void) | |
575 | { | |
576 | int result; | |
577 | ||
578 | ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); | |
579 | if (!ipw_tty_driver) | |
580 | return -ENOMEM; | |
581 | ||
099dc4fb DS |
582 | ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; |
583 | ipw_tty_driver->name = "ttyIPWp"; | |
584 | ipw_tty_driver->major = 0; | |
585 | ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; | |
586 | ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
587 | ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
588 | ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
589 | ipw_tty_driver->init_termios = tty_std_termios; | |
590 | ipw_tty_driver->init_termios.c_cflag = | |
591 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
592 | ipw_tty_driver->init_termios.c_ispeed = 9600; | |
593 | ipw_tty_driver->init_termios.c_ospeed = 9600; | |
594 | tty_set_operations(ipw_tty_driver, &tty_ops); | |
595 | result = tty_register_driver(ipw_tty_driver); | |
596 | if (result) { | |
597 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
598 | ": failed to register tty driver\n"); | |
599 | put_tty_driver(ipw_tty_driver); | |
600 | return result; | |
601 | } | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | void ipwireless_tty_release(void) | |
607 | { | |
608 | int ret; | |
609 | ||
610 | ret = tty_unregister_driver(ipw_tty_driver); | |
611 | put_tty_driver(ipw_tty_driver); | |
612 | if (ret != 0) | |
613 | printk(KERN_ERR IPWIRELESS_PCCARD_NAME | |
614 | ": tty_unregister_driver failed with code %d\n", ret); | |
615 | } | |
616 | ||
617 | int ipwireless_tty_is_modem(struct ipw_tty *tty) | |
618 | { | |
619 | return tty->tty_type == TTYTYPE_MODEM; | |
620 | } | |
621 | ||
622 | void | |
623 | ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, | |
624 | unsigned int channel_idx, | |
625 | unsigned int control_lines, | |
626 | unsigned int changed_mask) | |
627 | { | |
628 | unsigned int old_control_lines = tty->control_lines; | |
629 | ||
630 | tty->control_lines = (tty->control_lines & ~changed_mask) | |
631 | | (control_lines & changed_mask); | |
632 | ||
633 | /* | |
634 | * If DCD is de-asserted, we close the tty so pppd can tell that we | |
635 | * have gone offline. | |
636 | */ | |
637 | if ((old_control_lines & IPW_CONTROL_LINE_DCD) | |
638 | && !(tty->control_lines & IPW_CONTROL_LINE_DCD) | |
19ef1b71 JS |
639 | && tty->port.tty) { |
640 | tty_hangup(tty->port.tty); | |
099dc4fb DS |
641 | } |
642 | } | |
643 |