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s390/ftrace: enforce DYNAMIC_FTRACE if FUNCTION_TRACER is selected
[linux-2.6/btrfs-unstable.git] / drivers / usb / class / cdc-acm.c
blobe934e19f49f57e3e463c31c65caa76cca3fee905
1 /*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #undef DEBUG
32 #undef VERBOSE_DEBUG
33
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/tty.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/tty_flip.h>
42 #include <linux/module.h>
43 #include <linux/mutex.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/usb/cdc.h>
47 #include <asm/byteorder.h>
48 #include <asm/unaligned.h>
49 #include <linux/list.h>
50
51 #include "cdc-acm.h"
52
53
54 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
55 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57 static struct usb_driver acm_driver;
58 static struct tty_driver *acm_tty_driver;
59 static struct acm *acm_table[ACM_TTY_MINORS];
60
61 static DEFINE_MUTEX(acm_table_lock);
62
63 /*
64 * acm_table accessors
65 */
66
67 /*
68 * Look up an ACM structure by index. If found and not disconnected, increment
69 * its refcount and return it with its mutex held.
70 */
71 static struct acm *acm_get_by_index(unsigned index)
72 {
73 struct acm *acm;
74
75 mutex_lock(&acm_table_lock);
76 acm = acm_table[index];
77 if (acm) {
78 mutex_lock(&acm->mutex);
79 if (acm->disconnected) {
80 mutex_unlock(&acm->mutex);
81 acm = NULL;
82 } else {
83 tty_port_get(&acm->port);
84 mutex_unlock(&acm->mutex);
85 }
86 }
87 mutex_unlock(&acm_table_lock);
88 return acm;
89 }
90
91 /*
92 * Try to find an available minor number and if found, associate it with 'acm'.
93 */
94 static int acm_alloc_minor(struct acm *acm)
95 {
96 int minor;
97
98 mutex_lock(&acm_table_lock);
99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
100 if (!acm_table[minor]) {
101 acm_table[minor] = acm;
102 break;
103 }
104 }
105 mutex_unlock(&acm_table_lock);
106
107 return minor;
108 }
109
110 /* Release the minor number associated with 'acm'. */
111 static void acm_release_minor(struct acm *acm)
112 {
113 mutex_lock(&acm_table_lock);
114 acm_table[acm->minor] = NULL;
115 mutex_unlock(&acm_table_lock);
116 }
117
118 /*
119 * Functions for ACM control messages.
120 */
121
122 static int acm_ctrl_msg(struct acm *acm, int request, int value,
123 void *buf, int len)
124 {
125 int retval;
126
127 retval = usb_autopm_get_interface(acm->control);
128 if (retval)
129 return retval;
130
131 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
132 request, USB_RT_ACM, value,
133 acm->control->altsetting[0].desc.bInterfaceNumber,
134 buf, len, 5000);
135
136 dev_dbg(&acm->control->dev,
137 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
138 __func__, request, value, len, retval);
139
140 usb_autopm_put_interface(acm->control);
141
142 return retval < 0 ? retval : 0;
143 }
144
145 /* devices aren't required to support these requests.
146 * the cdc acm descriptor tells whether they do...
147 */
148 #define acm_set_control(acm, control) \
149 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
150 #define acm_set_line(acm, line) \
151 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
152 #define acm_send_break(acm, ms) \
153 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
154
155 /*
156 * Write buffer management.
157 * All of these assume proper locks taken by the caller.
158 */
159
160 static int acm_wb_alloc(struct acm *acm)
161 {
162 int i, wbn;
163 struct acm_wb *wb;
164
165 wbn = 0;
166 i = 0;
167 for (;;) {
168 wb = &acm->wb[wbn];
169 if (!wb->use) {
170 wb->use = 1;
171 return wbn;
172 }
173 wbn = (wbn + 1) % ACM_NW;
174 if (++i >= ACM_NW)
175 return -1;
176 }
177 }
178
179 static int acm_wb_is_avail(struct acm *acm)
180 {
181 int i, n;
182 unsigned long flags;
183
184 n = ACM_NW;
185 spin_lock_irqsave(&acm->write_lock, flags);
186 for (i = 0; i < ACM_NW; i++)
187 n -= acm->wb[i].use;
188 spin_unlock_irqrestore(&acm->write_lock, flags);
189 return n;
190 }
191
192 /*
193 * Finish write. Caller must hold acm->write_lock
194 */
195 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
196 {
197 wb->use = 0;
198 acm->transmitting--;
199 usb_autopm_put_interface_async(acm->control);
200 }
201
202 /*
203 * Poke write.
204 *
205 * the caller is responsible for locking
206 */
207
208 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
209 {
210 int rc;
211
212 acm->transmitting++;
213
214 wb->urb->transfer_buffer = wb->buf;
215 wb->urb->transfer_dma = wb->dmah;
216 wb->urb->transfer_buffer_length = wb->len;
217 wb->urb->dev = acm->dev;
218
219 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
220 if (rc < 0) {
221 dev_err(&acm->data->dev,
222 "%s - usb_submit_urb(write bulk) failed: %d\n",
223 __func__, rc);
224 acm_write_done(acm, wb);
225 }
226 return rc;
227 }
228
229 /*
230 * attributes exported through sysfs
231 */
232 static ssize_t show_caps
233 (struct device *dev, struct device_attribute *attr, char *buf)
234 {
235 struct usb_interface *intf = to_usb_interface(dev);
236 struct acm *acm = usb_get_intfdata(intf);
237
238 return sprintf(buf, "%d", acm->ctrl_caps);
239 }
240 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
241
242 static ssize_t show_country_codes
243 (struct device *dev, struct device_attribute *attr, char *buf)
244 {
245 struct usb_interface *intf = to_usb_interface(dev);
246 struct acm *acm = usb_get_intfdata(intf);
247
248 memcpy(buf, acm->country_codes, acm->country_code_size);
249 return acm->country_code_size;
250 }
251
252 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
253
254 static ssize_t show_country_rel_date
255 (struct device *dev, struct device_attribute *attr, char *buf)
256 {
257 struct usb_interface *intf = to_usb_interface(dev);
258 struct acm *acm = usb_get_intfdata(intf);
259
260 return sprintf(buf, "%d", acm->country_rel_date);
261 }
262
263 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
264 /*
265 * Interrupt handlers for various ACM device responses
266 */
267
268 /* control interface reports status changes with "interrupt" transfers */
269 static void acm_ctrl_irq(struct urb *urb)
270 {
271 struct acm *acm = urb->context;
272 struct usb_cdc_notification *dr = urb->transfer_buffer;
273 unsigned char *data;
274 int newctrl;
275 int difference;
276 int retval;
277 int status = urb->status;
278
279 switch (status) {
280 case 0:
281 /* success */
282 break;
283 case -ECONNRESET:
284 case -ENOENT:
285 case -ESHUTDOWN:
286 /* this urb is terminated, clean up */
287 dev_dbg(&acm->control->dev,
288 "%s - urb shutting down with status: %d\n",
289 __func__, status);
290 return;
291 default:
292 dev_dbg(&acm->control->dev,
293 "%s - nonzero urb status received: %d\n",
294 __func__, status);
295 goto exit;
296 }
297
298 usb_mark_last_busy(acm->dev);
299
300 data = (unsigned char *)(dr + 1);
301 switch (dr->bNotificationType) {
302 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
303 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
304 __func__, dr->wValue);
305 break;
306
307 case USB_CDC_NOTIFY_SERIAL_STATE:
308 newctrl = get_unaligned_le16(data);
309
310 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
311 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
312 __func__);
313 tty_port_tty_hangup(&acm->port, false);
314 }
315
316 difference = acm->ctrlin ^ newctrl;
317 spin_lock(&acm->read_lock);
318 acm->ctrlin = newctrl;
319 acm->oldcount = acm->iocount;
320
321 if (difference & ACM_CTRL_DSR)
322 acm->iocount.dsr++;
323 if (difference & ACM_CTRL_BRK)
324 acm->iocount.brk++;
325 if (difference & ACM_CTRL_RI)
326 acm->iocount.rng++;
327 if (difference & ACM_CTRL_DCD)
328 acm->iocount.dcd++;
329 if (difference & ACM_CTRL_FRAMING)
330 acm->iocount.frame++;
331 if (difference & ACM_CTRL_PARITY)
332 acm->iocount.parity++;
333 if (difference & ACM_CTRL_OVERRUN)
334 acm->iocount.overrun++;
335 spin_unlock(&acm->read_lock);
336
337 if (difference)
338 wake_up_all(&acm->wioctl);
339
340 break;
341
342 default:
343 dev_dbg(&acm->control->dev,
344 "%s - unknown notification %d received: index %d "
345 "len %d data0 %d data1 %d\n",
346 __func__,
347 dr->bNotificationType, dr->wIndex,
348 dr->wLength, data[0], data[1]);
349 break;
350 }
351 exit:
352 retval = usb_submit_urb(urb, GFP_ATOMIC);
353 if (retval)
354 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
355 __func__, retval);
356 }
357
358 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
359 {
360 int res;
361
362 if (!test_and_clear_bit(index, &acm->read_urbs_free))
363 return 0;
364
365 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
366
367 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
368 if (res) {
369 if (res != -EPERM) {
370 dev_err(&acm->data->dev,
371 "%s - usb_submit_urb failed: %d\n",
372 __func__, res);
373 }
374 set_bit(index, &acm->read_urbs_free);
375 return res;
376 }
377
378 return 0;
379 }
380
381 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
382 {
383 int res;
384 int i;
385
386 for (i = 0; i < acm->rx_buflimit; ++i) {
387 res = acm_submit_read_urb(acm, i, mem_flags);
388 if (res)
389 return res;
390 }
391
392 return 0;
393 }
394
395 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
396 {
397 if (!urb->actual_length)
398 return;
399
400 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
401 urb->actual_length);
402 tty_flip_buffer_push(&acm->port);
403 }
404
405 static void acm_read_bulk_callback(struct urb *urb)
406 {
407 struct acm_rb *rb = urb->context;
408 struct acm *acm = rb->instance;
409 unsigned long flags;
410
411 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
412 rb->index, urb->actual_length);
413 set_bit(rb->index, &acm->read_urbs_free);
414
415 if (!acm->dev) {
416 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
417 return;
418 }
419
420 if (urb->status) {
421 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
422 __func__, urb->status);
423 return;
424 }
425
426 usb_mark_last_busy(acm->dev);
427
428 acm_process_read_urb(acm, urb);
429
430 /* throttle device if requested by tty */
431 spin_lock_irqsave(&acm->read_lock, flags);
432 acm->throttled = acm->throttle_req;
433 if (!acm->throttled) {
434 spin_unlock_irqrestore(&acm->read_lock, flags);
435 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
436 } else {
437 spin_unlock_irqrestore(&acm->read_lock, flags);
438 }
439 }
440
441 /* data interface wrote those outgoing bytes */
442 static void acm_write_bulk(struct urb *urb)
443 {
444 struct acm_wb *wb = urb->context;
445 struct acm *acm = wb->instance;
446 unsigned long flags;
447
448 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
449 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
450 __func__,
451 urb->actual_length,
452 urb->transfer_buffer_length,
453 urb->status);
454
455 spin_lock_irqsave(&acm->write_lock, flags);
456 acm_write_done(acm, wb);
457 spin_unlock_irqrestore(&acm->write_lock, flags);
458 schedule_work(&acm->work);
459 }
460
461 static void acm_softint(struct work_struct *work)
462 {
463 struct acm *acm = container_of(work, struct acm, work);
464
465 dev_vdbg(&acm->data->dev, "%s\n", __func__);
466
467 tty_port_tty_wakeup(&acm->port);
468 }
469
470 /*
471 * TTY handlers
472 */
473
474 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
475 {
476 struct acm *acm;
477 int retval;
478
479 dev_dbg(tty->dev, "%s\n", __func__);
480
481 acm = acm_get_by_index(tty->index);
482 if (!acm)
483 return -ENODEV;
484
485 retval = tty_standard_install(driver, tty);
486 if (retval)
487 goto error_init_termios;
488
489 tty->driver_data = acm;
490
491 return 0;
492
493 error_init_termios:
494 tty_port_put(&acm->port);
495 return retval;
496 }
497
498 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
499 {
500 struct acm *acm = tty->driver_data;
501
502 dev_dbg(tty->dev, "%s\n", __func__);
503
504 return tty_port_open(&acm->port, tty, filp);
505 }
506
507 static void acm_port_dtr_rts(struct tty_port *port, int raise)
508 {
509 struct acm *acm = container_of(port, struct acm, port);
510 int val;
511 int res;
512
513 if (raise)
514 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
515 else
516 val = 0;
517
518 /* FIXME: add missing ctrlout locking throughout driver */
519 acm->ctrlout = val;
520
521 res = acm_set_control(acm, val);
522 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
523 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
524 }
525
526 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
527 {
528 struct acm *acm = container_of(port, struct acm, port);
529 int retval = -ENODEV;
530 int i;
531
532 dev_dbg(&acm->control->dev, "%s\n", __func__);
533
534 mutex_lock(&acm->mutex);
535 if (acm->disconnected)
536 goto disconnected;
537
538 retval = usb_autopm_get_interface(acm->control);
539 if (retval)
540 goto error_get_interface;
541
542 /*
543 * FIXME: Why do we need this? Allocating 64K of physically contiguous
544 * memory is really nasty...
545 */
546 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
547 acm->control->needs_remote_wakeup = 1;
548
549 acm->ctrlurb->dev = acm->dev;
550 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
551 if (retval) {
552 dev_err(&acm->control->dev,
553 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
554 goto error_submit_urb;
555 }
556
557 /*
558 * Unthrottle device in case the TTY was closed while throttled.
559 */
560 spin_lock_irq(&acm->read_lock);
561 acm->throttled = 0;
562 acm->throttle_req = 0;
563 spin_unlock_irq(&acm->read_lock);
564
565 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
566 if (retval)
567 goto error_submit_read_urbs;
568
569 usb_autopm_put_interface(acm->control);
570
571 mutex_unlock(&acm->mutex);
572
573 return 0;
574
575 error_submit_read_urbs:
576 for (i = 0; i < acm->rx_buflimit; i++)
577 usb_kill_urb(acm->read_urbs[i]);
578 usb_kill_urb(acm->ctrlurb);
579 error_submit_urb:
580 usb_autopm_put_interface(acm->control);
581 error_get_interface:
582 disconnected:
583 mutex_unlock(&acm->mutex);
584
585 return usb_translate_errors(retval);
586 }
587
588 static void acm_port_destruct(struct tty_port *port)
589 {
590 struct acm *acm = container_of(port, struct acm, port);
591
592 dev_dbg(&acm->control->dev, "%s\n", __func__);
593
594 acm_release_minor(acm);
595 usb_put_intf(acm->control);
596 kfree(acm->country_codes);
597 kfree(acm);
598 }
599
600 static void acm_port_shutdown(struct tty_port *port)
601 {
602 struct acm *acm = container_of(port, struct acm, port);
603 struct urb *urb;
604 struct acm_wb *wb;
605 int i;
606
607 dev_dbg(&acm->control->dev, "%s\n", __func__);
608
609 /*
610 * Need to grab write_lock to prevent race with resume, but no need to
611 * hold it due to the tty-port initialised flag.
612 */
613 spin_lock_irq(&acm->write_lock);
614 spin_unlock_irq(&acm->write_lock);
615
616 usb_autopm_get_interface_no_resume(acm->control);
617 acm->control->needs_remote_wakeup = 0;
618 usb_autopm_put_interface(acm->control);
619
620 for (;;) {
621 urb = usb_get_from_anchor(&acm->delayed);
622 if (!urb)
623 break;
624 wb = urb->context;
625 wb->use = 0;
626 usb_autopm_put_interface_async(acm->control);
627 }
628
629 usb_kill_urb(acm->ctrlurb);
630 for (i = 0; i < ACM_NW; i++)
631 usb_kill_urb(acm->wb[i].urb);
632 for (i = 0; i < acm->rx_buflimit; i++)
633 usb_kill_urb(acm->read_urbs[i]);
634 }
635
636 static void acm_tty_cleanup(struct tty_struct *tty)
637 {
638 struct acm *acm = tty->driver_data;
639 dev_dbg(&acm->control->dev, "%s\n", __func__);
640 tty_port_put(&acm->port);
641 }
642
643 static void acm_tty_hangup(struct tty_struct *tty)
644 {
645 struct acm *acm = tty->driver_data;
646 dev_dbg(&acm->control->dev, "%s\n", __func__);
647 tty_port_hangup(&acm->port);
648 }
649
650 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
651 {
652 struct acm *acm = tty->driver_data;
653 dev_dbg(&acm->control->dev, "%s\n", __func__);
654 tty_port_close(&acm->port, tty, filp);
655 }
656
657 static int acm_tty_write(struct tty_struct *tty,
658 const unsigned char *buf, int count)
659 {
660 struct acm *acm = tty->driver_data;
661 int stat;
662 unsigned long flags;
663 int wbn;
664 struct acm_wb *wb;
665
666 if (!count)
667 return 0;
668
669 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
670
671 spin_lock_irqsave(&acm->write_lock, flags);
672 wbn = acm_wb_alloc(acm);
673 if (wbn < 0) {
674 spin_unlock_irqrestore(&acm->write_lock, flags);
675 return 0;
676 }
677 wb = &acm->wb[wbn];
678
679 if (!acm->dev) {
680 wb->use = 0;
681 spin_unlock_irqrestore(&acm->write_lock, flags);
682 return -ENODEV;
683 }
684
685 count = (count > acm->writesize) ? acm->writesize : count;
686 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
687 memcpy(wb->buf, buf, count);
688 wb->len = count;
689
690 stat = usb_autopm_get_interface_async(acm->control);
691 if (stat) {
692 wb->use = 0;
693 spin_unlock_irqrestore(&acm->write_lock, flags);
694 return stat;
695 }
696
697 if (acm->susp_count) {
698 usb_anchor_urb(wb->urb, &acm->delayed);
699 spin_unlock_irqrestore(&acm->write_lock, flags);
700 return count;
701 }
702
703 stat = acm_start_wb(acm, wb);
704 spin_unlock_irqrestore(&acm->write_lock, flags);
705
706 if (stat < 0)
707 return stat;
708 return count;
709 }
710
711 static int acm_tty_write_room(struct tty_struct *tty)
712 {
713 struct acm *acm = tty->driver_data;
714 /*
715 * Do not let the line discipline to know that we have a reserve,
716 * or it might get too enthusiastic.
717 */
718 return acm_wb_is_avail(acm) ? acm->writesize : 0;
719 }
720
721 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
722 {
723 struct acm *acm = tty->driver_data;
724 /*
725 * if the device was unplugged then any remaining characters fell out
726 * of the connector ;)
727 */
728 if (acm->disconnected)
729 return 0;
730 /*
731 * This is inaccurate (overcounts), but it works.
732 */
733 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
734 }
735
736 static void acm_tty_throttle(struct tty_struct *tty)
737 {
738 struct acm *acm = tty->driver_data;
739
740 spin_lock_irq(&acm->read_lock);
741 acm->throttle_req = 1;
742 spin_unlock_irq(&acm->read_lock);
743 }
744
745 static void acm_tty_unthrottle(struct tty_struct *tty)
746 {
747 struct acm *acm = tty->driver_data;
748 unsigned int was_throttled;
749
750 spin_lock_irq(&acm->read_lock);
751 was_throttled = acm->throttled;
752 acm->throttled = 0;
753 acm->throttle_req = 0;
754 spin_unlock_irq(&acm->read_lock);
755
756 if (was_throttled)
757 acm_submit_read_urbs(acm, GFP_KERNEL);
758 }
759
760 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
761 {
762 struct acm *acm = tty->driver_data;
763 int retval;
764
765 retval = acm_send_break(acm, state ? 0xffff : 0);
766 if (retval < 0)
767 dev_dbg(&acm->control->dev, "%s - send break failed\n",
768 __func__);
769 return retval;
770 }
771
772 static int acm_tty_tiocmget(struct tty_struct *tty)
773 {
774 struct acm *acm = tty->driver_data;
775
776 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
777 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
778 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
779 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
780 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
781 TIOCM_CTS;
782 }
783
784 static int acm_tty_tiocmset(struct tty_struct *tty,
785 unsigned int set, unsigned int clear)
786 {
787 struct acm *acm = tty->driver_data;
788 unsigned int newctrl;
789
790 newctrl = acm->ctrlout;
791 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
792 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
793 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
794 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
795
796 newctrl = (newctrl & ~clear) | set;
797
798 if (acm->ctrlout == newctrl)
799 return 0;
800 return acm_set_control(acm, acm->ctrlout = newctrl);
801 }
802
803 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
804 {
805 struct serial_struct tmp;
806
807 if (!info)
808 return -EINVAL;
809
810 memset(&tmp, 0, sizeof(tmp));
811 tmp.flags = ASYNC_LOW_LATENCY;
812 tmp.xmit_fifo_size = acm->writesize;
813 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
814 tmp.close_delay = acm->port.close_delay / 10;
815 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
816 ASYNC_CLOSING_WAIT_NONE :
817 acm->port.closing_wait / 10;
818
819 if (copy_to_user(info, &tmp, sizeof(tmp)))
820 return -EFAULT;
821 else
822 return 0;
823 }
824
825 static int set_serial_info(struct acm *acm,
826 struct serial_struct __user *newinfo)
827 {
828 struct serial_struct new_serial;
829 unsigned int closing_wait, close_delay;
830 int retval = 0;
831
832 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
833 return -EFAULT;
834
835 close_delay = new_serial.close_delay * 10;
836 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
837 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
838
839 mutex_lock(&acm->port.mutex);
840
841 if (!capable(CAP_SYS_ADMIN)) {
842 if ((close_delay != acm->port.close_delay) ||
843 (closing_wait != acm->port.closing_wait))
844 retval = -EPERM;
845 else
846 retval = -EOPNOTSUPP;
847 } else {
848 acm->port.close_delay = close_delay;
849 acm->port.closing_wait = closing_wait;
850 }
851
852 mutex_unlock(&acm->port.mutex);
853 return retval;
854 }
855
856 static int wait_serial_change(struct acm *acm, unsigned long arg)
857 {
858 int rv = 0;
859 DECLARE_WAITQUEUE(wait, current);
860 struct async_icount old, new;
861
862 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
863 return -EINVAL;
864 do {
865 spin_lock_irq(&acm->read_lock);
866 old = acm->oldcount;
867 new = acm->iocount;
868 acm->oldcount = new;
869 spin_unlock_irq(&acm->read_lock);
870
871 if ((arg & TIOCM_DSR) &&
872 old.dsr != new.dsr)
873 break;
874 if ((arg & TIOCM_CD) &&
875 old.dcd != new.dcd)
876 break;
877 if ((arg & TIOCM_RI) &&
878 old.rng != new.rng)
879 break;
880
881 add_wait_queue(&acm->wioctl, &wait);
882 set_current_state(TASK_INTERRUPTIBLE);
883 schedule();
884 remove_wait_queue(&acm->wioctl, &wait);
885 if (acm->disconnected) {
886 if (arg & TIOCM_CD)
887 break;
888 else
889 rv = -ENODEV;
890 } else {
891 if (signal_pending(current))
892 rv = -ERESTARTSYS;
893 }
894 } while (!rv);
895
896
897
898 return rv;
899 }
900
901 static int get_serial_usage(struct acm *acm,
902 struct serial_icounter_struct __user *count)
903 {
904 struct serial_icounter_struct icount;
905 int rv = 0;
906
907 memset(&icount, 0, sizeof(icount));
908 icount.dsr = acm->iocount.dsr;
909 icount.rng = acm->iocount.rng;
910 icount.dcd = acm->iocount.dcd;
911 icount.frame = acm->iocount.frame;
912 icount.overrun = acm->iocount.overrun;
913 icount.parity = acm->iocount.parity;
914 icount.brk = acm->iocount.brk;
915
916 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
917 rv = -EFAULT;
918
919 return rv;
920 }
921
922 static int acm_tty_ioctl(struct tty_struct *tty,
923 unsigned int cmd, unsigned long arg)
924 {
925 struct acm *acm = tty->driver_data;
926 int rv = -ENOIOCTLCMD;
927
928 switch (cmd) {
929 case TIOCGSERIAL: /* gets serial port data */
930 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
931 break;
932 case TIOCSSERIAL:
933 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
934 break;
935 case TIOCMIWAIT:
936 rv = usb_autopm_get_interface(acm->control);
937 if (rv < 0) {
938 rv = -EIO;
939 break;
940 }
941 rv = wait_serial_change(acm, arg);
942 usb_autopm_put_interface(acm->control);
943 break;
944 case TIOCGICOUNT:
945 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
946 break;
947 }
948
949 return rv;
950 }
951
952 static void acm_tty_set_termios(struct tty_struct *tty,
953 struct ktermios *termios_old)
954 {
955 struct acm *acm = tty->driver_data;
956 struct ktermios *termios = &tty->termios;
957 struct usb_cdc_line_coding newline;
958 int newctrl = acm->ctrlout;
959
960 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
961 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
962 newline.bParityType = termios->c_cflag & PARENB ?
963 (termios->c_cflag & PARODD ? 1 : 2) +
964 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
965 switch (termios->c_cflag & CSIZE) {
966 case CS5:
967 newline.bDataBits = 5;
968 break;
969 case CS6:
970 newline.bDataBits = 6;
971 break;
972 case CS7:
973 newline.bDataBits = 7;
974 break;
975 case CS8:
976 default:
977 newline.bDataBits = 8;
978 break;
979 }
980 /* FIXME: Needs to clear unsupported bits in the termios */
981 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
982
983 if (!newline.dwDTERate) {
984 newline.dwDTERate = acm->line.dwDTERate;
985 newctrl &= ~ACM_CTRL_DTR;
986 } else
987 newctrl |= ACM_CTRL_DTR;
988
989 if (newctrl != acm->ctrlout)
990 acm_set_control(acm, acm->ctrlout = newctrl);
991
992 if (memcmp(&acm->line, &newline, sizeof newline)) {
993 memcpy(&acm->line, &newline, sizeof newline);
994 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
995 __func__,
996 le32_to_cpu(newline.dwDTERate),
997 newline.bCharFormat, newline.bParityType,
998 newline.bDataBits);
999 acm_set_line(acm, &acm->line);
1000 }
1001 }
1002
1003 static const struct tty_port_operations acm_port_ops = {
1004 .dtr_rts = acm_port_dtr_rts,
1005 .shutdown = acm_port_shutdown,
1006 .activate = acm_port_activate,
1007 .destruct = acm_port_destruct,
1008 };
1009
1010 /*
1011 * USB probe and disconnect routines.
1012 */
1013
1014 /* Little helpers: write/read buffers free */
1015 static void acm_write_buffers_free(struct acm *acm)
1016 {
1017 int i;
1018 struct acm_wb *wb;
1019 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1020
1021 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1022 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1023 }
1024
1025 static void acm_read_buffers_free(struct acm *acm)
1026 {
1027 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1028 int i;
1029
1030 for (i = 0; i < acm->rx_buflimit; i++)
1031 usb_free_coherent(usb_dev, acm->readsize,
1032 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1033 }
1034
1035 /* Little helper: write buffers allocate */
1036 static int acm_write_buffers_alloc(struct acm *acm)
1037 {
1038 int i;
1039 struct acm_wb *wb;
1040
1041 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1042 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1043 &wb->dmah);
1044 if (!wb->buf) {
1045 while (i != 0) {
1046 --i;
1047 --wb;
1048 usb_free_coherent(acm->dev, acm->writesize,
1049 wb->buf, wb->dmah);
1050 }
1051 return -ENOMEM;
1052 }
1053 }
1054 return 0;
1055 }
1056
1057 static int acm_probe(struct usb_interface *intf,
1058 const struct usb_device_id *id)
1059 {
1060 struct usb_cdc_union_desc *union_header = NULL;
1061 struct usb_cdc_country_functional_desc *cfd = NULL;
1062 unsigned char *buffer = intf->altsetting->extra;
1063 int buflen = intf->altsetting->extralen;
1064 struct usb_interface *control_interface;
1065 struct usb_interface *data_interface;
1066 struct usb_endpoint_descriptor *epctrl = NULL;
1067 struct usb_endpoint_descriptor *epread = NULL;
1068 struct usb_endpoint_descriptor *epwrite = NULL;
1069 struct usb_device *usb_dev = interface_to_usbdev(intf);
1070 struct acm *acm;
1071 int minor;
1072 int ctrlsize, readsize;
1073 u8 *buf;
1074 u8 ac_management_function = 0;
1075 u8 call_management_function = 0;
1076 int call_interface_num = -1;
1077 int data_interface_num = -1;
1078 unsigned long quirks;
1079 int num_rx_buf;
1080 int i;
1081 int combined_interfaces = 0;
1082 struct device *tty_dev;
1083 int rv = -ENOMEM;
1084
1085 /* normal quirks */
1086 quirks = (unsigned long)id->driver_info;
1087
1088 if (quirks == IGNORE_DEVICE)
1089 return -ENODEV;
1090
1091 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1092
1093 /* handle quirks deadly to normal probing*/
1094 if (quirks == NO_UNION_NORMAL) {
1095 data_interface = usb_ifnum_to_if(usb_dev, 1);
1096 control_interface = usb_ifnum_to_if(usb_dev, 0);
1097 goto skip_normal_probe;
1098 }
1099
1100 /* normal probing*/
1101 if (!buffer) {
1102 dev_err(&intf->dev, "Weird descriptor references\n");
1103 return -EINVAL;
1104 }
1105
1106 if (!buflen) {
1107 if (intf->cur_altsetting->endpoint &&
1108 intf->cur_altsetting->endpoint->extralen &&
1109 intf->cur_altsetting->endpoint->extra) {
1110 dev_dbg(&intf->dev,
1111 "Seeking extra descriptors on endpoint\n");
1112 buflen = intf->cur_altsetting->endpoint->extralen;
1113 buffer = intf->cur_altsetting->endpoint->extra;
1114 } else {
1115 dev_err(&intf->dev,
1116 "Zero length descriptor references\n");
1117 return -EINVAL;
1118 }
1119 }
1120
1121 while (buflen > 0) {
1122 if (buffer[1] != USB_DT_CS_INTERFACE) {
1123 dev_err(&intf->dev, "skipping garbage\n");
1124 goto next_desc;
1125 }
1126
1127 switch (buffer[2]) {
1128 case USB_CDC_UNION_TYPE: /* we've found it */
1129 if (union_header) {
1130 dev_err(&intf->dev, "More than one "
1131 "union descriptor, skipping ...\n");
1132 goto next_desc;
1133 }
1134 union_header = (struct usb_cdc_union_desc *)buffer;
1135 break;
1136 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1137 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1138 break;
1139 case USB_CDC_HEADER_TYPE: /* maybe check version */
1140 break; /* for now we ignore it */
1141 case USB_CDC_ACM_TYPE:
1142 ac_management_function = buffer[3];
1143 break;
1144 case USB_CDC_CALL_MANAGEMENT_TYPE:
1145 call_management_function = buffer[3];
1146 call_interface_num = buffer[4];
1147 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1148 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1149 break;
1150 default:
1151 /* there are LOTS more CDC descriptors that
1152 * could legitimately be found here.
1153 */
1154 dev_dbg(&intf->dev, "Ignoring descriptor: "
1155 "type %02x, length %d\n",
1156 buffer[2], buffer[0]);
1157 break;
1158 }
1159 next_desc:
1160 buflen -= buffer[0];
1161 buffer += buffer[0];
1162 }
1163
1164 if (!union_header) {
1165 if (call_interface_num > 0) {
1166 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1167 /* quirks for Droids MuIn LCD */
1168 if (quirks & NO_DATA_INTERFACE)
1169 data_interface = usb_ifnum_to_if(usb_dev, 0);
1170 else
1171 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1172 control_interface = intf;
1173 } else {
1174 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1175 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1176 return -ENODEV;
1177 } else {
1178 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1179 combined_interfaces = 1;
1180 control_interface = data_interface = intf;
1181 goto look_for_collapsed_interface;
1182 }
1183 }
1184 } else {
1185 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1186 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1187 if (!control_interface || !data_interface) {
1188 dev_dbg(&intf->dev, "no interfaces\n");
1189 return -ENODEV;
1190 }
1191 }
1192
1193 if (data_interface_num != call_interface_num)
1194 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1195
1196 if (control_interface == data_interface) {
1197 /* some broken devices designed for windows work this way */
1198 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1199 combined_interfaces = 1;
1200 /* a popular other OS doesn't use it */
1201 quirks |= NO_CAP_LINE;
1202 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1203 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1204 return -EINVAL;
1205 }
1206 look_for_collapsed_interface:
1207 for (i = 0; i < 3; i++) {
1208 struct usb_endpoint_descriptor *ep;
1209 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1210
1211 if (usb_endpoint_is_int_in(ep))
1212 epctrl = ep;
1213 else if (usb_endpoint_is_bulk_out(ep))
1214 epwrite = ep;
1215 else if (usb_endpoint_is_bulk_in(ep))
1216 epread = ep;
1217 else
1218 return -EINVAL;
1219 }
1220 if (!epctrl || !epread || !epwrite)
1221 return -ENODEV;
1222 else
1223 goto made_compressed_probe;
1224 }
1225
1226 skip_normal_probe:
1227
1228 /*workaround for switched interfaces */
1229 if (data_interface->cur_altsetting->desc.bInterfaceClass
1230 != CDC_DATA_INTERFACE_TYPE) {
1231 if (control_interface->cur_altsetting->desc.bInterfaceClass
1232 == CDC_DATA_INTERFACE_TYPE) {
1233 struct usb_interface *t;
1234 dev_dbg(&intf->dev,
1235 "Your device has switched interfaces.\n");
1236 t = control_interface;
1237 control_interface = data_interface;
1238 data_interface = t;
1239 } else {
1240 return -EINVAL;
1241 }
1242 }
1243
1244 /* Accept probe requests only for the control interface */
1245 if (!combined_interfaces && intf != control_interface)
1246 return -ENODEV;
1247
1248 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1249 /* valid in this context */
1250 dev_dbg(&intf->dev, "The data interface isn't available\n");
1251 return -EBUSY;
1252 }
1253
1254
1255 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1256 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1257 return -EINVAL;
1258
1259 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1260 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1261 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1262
1263
1264 /* workaround for switched endpoints */
1265 if (!usb_endpoint_dir_in(epread)) {
1266 /* descriptors are swapped */
1267 struct usb_endpoint_descriptor *t;
1268 dev_dbg(&intf->dev,
1269 "The data interface has switched endpoints\n");
1270 t = epread;
1271 epread = epwrite;
1272 epwrite = t;
1273 }
1274 made_compressed_probe:
1275 dev_dbg(&intf->dev, "interfaces are valid\n");
1276
1277 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1278 if (acm == NULL) {
1279 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1280 goto alloc_fail;
1281 }
1282
1283 minor = acm_alloc_minor(acm);
1284 if (minor == ACM_TTY_MINORS) {
1285 dev_err(&intf->dev, "no more free acm devices\n");
1286 kfree(acm);
1287 return -ENODEV;
1288 }
1289
1290 ctrlsize = usb_endpoint_maxp(epctrl);
1291 readsize = usb_endpoint_maxp(epread) *
1292 (quirks == SINGLE_RX_URB ? 1 : 2);
1293 acm->combined_interfaces = combined_interfaces;
1294 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1295 acm->control = control_interface;
1296 acm->data = data_interface;
1297 acm->minor = minor;
1298 acm->dev = usb_dev;
1299 acm->ctrl_caps = ac_management_function;
1300 if (quirks & NO_CAP_LINE)
1301 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1302 acm->ctrlsize = ctrlsize;
1303 acm->readsize = readsize;
1304 acm->rx_buflimit = num_rx_buf;
1305 INIT_WORK(&acm->work, acm_softint);
1306 init_waitqueue_head(&acm->wioctl);
1307 spin_lock_init(&acm->write_lock);
1308 spin_lock_init(&acm->read_lock);
1309 mutex_init(&acm->mutex);
1310 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1311 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1312 if (acm->is_int_ep)
1313 acm->bInterval = epread->bInterval;
1314 tty_port_init(&acm->port);
1315 acm->port.ops = &acm_port_ops;
1316 init_usb_anchor(&acm->delayed);
1317
1318 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1319 if (!buf) {
1320 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1321 goto alloc_fail2;
1322 }
1323 acm->ctrl_buffer = buf;
1324
1325 if (acm_write_buffers_alloc(acm) < 0) {
1326 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1327 goto alloc_fail4;
1328 }
1329
1330 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1331 if (!acm->ctrlurb) {
1332 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1333 goto alloc_fail5;
1334 }
1335 for (i = 0; i < num_rx_buf; i++) {
1336 struct acm_rb *rb = &(acm->read_buffers[i]);
1337 struct urb *urb;
1338
1339 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1340 &rb->dma);
1341 if (!rb->base) {
1342 dev_err(&intf->dev, "out of memory "
1343 "(read bufs usb_alloc_coherent)\n");
1344 goto alloc_fail6;
1345 }
1346 rb->index = i;
1347 rb->instance = acm;
1348
1349 urb = usb_alloc_urb(0, GFP_KERNEL);
1350 if (!urb) {
1351 dev_err(&intf->dev,
1352 "out of memory (read urbs usb_alloc_urb)\n");
1353 goto alloc_fail6;
1354 }
1355 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1356 urb->transfer_dma = rb->dma;
1357 if (acm->is_int_ep) {
1358 usb_fill_int_urb(urb, acm->dev,
1359 acm->rx_endpoint,
1360 rb->base,
1361 acm->readsize,
1362 acm_read_bulk_callback, rb,
1363 acm->bInterval);
1364 } else {
1365 usb_fill_bulk_urb(urb, acm->dev,
1366 acm->rx_endpoint,
1367 rb->base,
1368 acm->readsize,
1369 acm_read_bulk_callback, rb);
1370 }
1371
1372 acm->read_urbs[i] = urb;
1373 __set_bit(i, &acm->read_urbs_free);
1374 }
1375 for (i = 0; i < ACM_NW; i++) {
1376 struct acm_wb *snd = &(acm->wb[i]);
1377
1378 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1379 if (snd->urb == NULL) {
1380 dev_err(&intf->dev,
1381 "out of memory (write urbs usb_alloc_urb)\n");
1382 goto alloc_fail7;
1383 }
1384
1385 if (usb_endpoint_xfer_int(epwrite))
1386 usb_fill_int_urb(snd->urb, usb_dev,
1387 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1388 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1389 else
1390 usb_fill_bulk_urb(snd->urb, usb_dev,
1391 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1392 NULL, acm->writesize, acm_write_bulk, snd);
1393 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1394 snd->instance = acm;
1395 }
1396
1397 usb_set_intfdata(intf, acm);
1398
1399 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1400 if (i < 0)
1401 goto alloc_fail7;
1402
1403 if (cfd) { /* export the country data */
1404 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1405 if (!acm->country_codes)
1406 goto skip_countries;
1407 acm->country_code_size = cfd->bLength - 4;
1408 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1409 cfd->bLength - 4);
1410 acm->country_rel_date = cfd->iCountryCodeRelDate;
1411
1412 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1413 if (i < 0) {
1414 kfree(acm->country_codes);
1415 acm->country_codes = NULL;
1416 acm->country_code_size = 0;
1417 goto skip_countries;
1418 }
1419
1420 i = device_create_file(&intf->dev,
1421 &dev_attr_iCountryCodeRelDate);
1422 if (i < 0) {
1423 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1424 kfree(acm->country_codes);
1425 acm->country_codes = NULL;
1426 acm->country_code_size = 0;
1427 goto skip_countries;
1428 }
1429 }
1430
1431 skip_countries:
1432 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1433 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1434 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1435 /* works around buggy devices */
1436 epctrl->bInterval ? epctrl->bInterval : 16);
1437 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1438 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1439
1440 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1441
1442 acm->line.dwDTERate = cpu_to_le32(9600);
1443 acm->line.bDataBits = 8;
1444 acm_set_line(acm, &acm->line);
1445
1446 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1447 usb_set_intfdata(data_interface, acm);
1448
1449 usb_get_intf(control_interface);
1450 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1451 &control_interface->dev);
1452 if (IS_ERR(tty_dev)) {
1453 rv = PTR_ERR(tty_dev);
1454 goto alloc_fail8;
1455 }
1456
1457 return 0;
1458 alloc_fail8:
1459 if (acm->country_codes) {
1460 device_remove_file(&acm->control->dev,
1461 &dev_attr_wCountryCodes);
1462 device_remove_file(&acm->control->dev,
1463 &dev_attr_iCountryCodeRelDate);
1464 }
1465 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1466 alloc_fail7:
1467 usb_set_intfdata(intf, NULL);
1468 for (i = 0; i < ACM_NW; i++)
1469 usb_free_urb(acm->wb[i].urb);
1470 alloc_fail6:
1471 for (i = 0; i < num_rx_buf; i++)
1472 usb_free_urb(acm->read_urbs[i]);
1473 acm_read_buffers_free(acm);
1474 usb_free_urb(acm->ctrlurb);
1475 alloc_fail5:
1476 acm_write_buffers_free(acm);
1477 alloc_fail4:
1478 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1479 alloc_fail2:
1480 acm_release_minor(acm);
1481 kfree(acm);
1482 alloc_fail:
1483 return rv;
1484 }
1485
1486 static void stop_data_traffic(struct acm *acm)
1487 {
1488 int i;
1489
1490 dev_dbg(&acm->control->dev, "%s\n", __func__);
1491
1492 usb_kill_urb(acm->ctrlurb);
1493 for (i = 0; i < ACM_NW; i++)
1494 usb_kill_urb(acm->wb[i].urb);
1495 for (i = 0; i < acm->rx_buflimit; i++)
1496 usb_kill_urb(acm->read_urbs[i]);
1497
1498 cancel_work_sync(&acm->work);
1499 }
1500
1501 static void acm_disconnect(struct usb_interface *intf)
1502 {
1503 struct acm *acm = usb_get_intfdata(intf);
1504 struct usb_device *usb_dev = interface_to_usbdev(intf);
1505 struct tty_struct *tty;
1506 int i;
1507
1508 dev_dbg(&intf->dev, "%s\n", __func__);
1509
1510 /* sibling interface is already cleaning up */
1511 if (!acm)
1512 return;
1513
1514 mutex_lock(&acm->mutex);
1515 acm->disconnected = true;
1516 if (acm->country_codes) {
1517 device_remove_file(&acm->control->dev,
1518 &dev_attr_wCountryCodes);
1519 device_remove_file(&acm->control->dev,
1520 &dev_attr_iCountryCodeRelDate);
1521 }
1522 wake_up_all(&acm->wioctl);
1523 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1524 usb_set_intfdata(acm->control, NULL);
1525 usb_set_intfdata(acm->data, NULL);
1526 mutex_unlock(&acm->mutex);
1527
1528 tty = tty_port_tty_get(&acm->port);
1529 if (tty) {
1530 tty_vhangup(tty);
1531 tty_kref_put(tty);
1532 }
1533
1534 stop_data_traffic(acm);
1535
1536 tty_unregister_device(acm_tty_driver, acm->minor);
1537
1538 usb_free_urb(acm->ctrlurb);
1539 for (i = 0; i < ACM_NW; i++)
1540 usb_free_urb(acm->wb[i].urb);
1541 for (i = 0; i < acm->rx_buflimit; i++)
1542 usb_free_urb(acm->read_urbs[i]);
1543 acm_write_buffers_free(acm);
1544 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1545 acm_read_buffers_free(acm);
1546
1547 if (!acm->combined_interfaces)
1548 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1549 acm->data : acm->control);
1550
1551 tty_port_put(&acm->port);
1552 }
1553
1554 #ifdef CONFIG_PM
1555 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1556 {
1557 struct acm *acm = usb_get_intfdata(intf);
1558 int cnt;
1559
1560 spin_lock_irq(&acm->write_lock);
1561 if (PMSG_IS_AUTO(message)) {
1562 if (acm->transmitting) {
1563 spin_unlock_irq(&acm->write_lock);
1564 return -EBUSY;
1565 }
1566 }
1567 cnt = acm->susp_count++;
1568 spin_unlock_irq(&acm->write_lock);
1569
1570 if (cnt)
1571 return 0;
1572
1573 stop_data_traffic(acm);
1574
1575 return 0;
1576 }
1577
1578 static int acm_resume(struct usb_interface *intf)
1579 {
1580 struct acm *acm = usb_get_intfdata(intf);
1581 struct urb *urb;
1582 int rv = 0;
1583
1584 spin_lock_irq(&acm->write_lock);
1585
1586 if (--acm->susp_count)
1587 goto out;
1588
1589 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1590 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1591
1592 for (;;) {
1593 urb = usb_get_from_anchor(&acm->delayed);
1594 if (!urb)
1595 break;
1596
1597 acm_start_wb(acm, urb->context);
1598 }
1599
1600 /*
1601 * delayed error checking because we must
1602 * do the write path at all cost
1603 */
1604 if (rv < 0)
1605 goto out;
1606
1607 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1608 }
1609 out:
1610 spin_unlock_irq(&acm->write_lock);
1611
1612 return rv;
1613 }
1614
1615 static int acm_reset_resume(struct usb_interface *intf)
1616 {
1617 struct acm *acm = usb_get_intfdata(intf);
1618
1619 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1620 tty_port_tty_hangup(&acm->port, false);
1621
1622 return acm_resume(intf);
1623 }
1624
1625 #endif /* CONFIG_PM */
1626
1627 #define NOKIA_PCSUITE_ACM_INFO(x) \
1628 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1629 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1630 USB_CDC_ACM_PROTO_VENDOR)
1631
1632 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1633 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1634 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1635 USB_CDC_ACM_PROTO_VENDOR)
1636
1637 /*
1638 * USB driver structure.
1639 */
1640
1641 static const struct usb_device_id acm_ids[] = {
1642 /* quirky and broken devices */
1643 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1644 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1645 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1646 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1647 },
1648 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1649 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1650 },
1651 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1652 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1653 },
1654 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1655 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1656 },
1657 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1659 },
1660 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1661 .driver_info = SINGLE_RX_URB,
1662 },
1663 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1664 .driver_info = SINGLE_RX_URB, /* firmware bug */
1665 },
1666 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1667 .driver_info = SINGLE_RX_URB, /* firmware bug */
1668 },
1669 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1671 },
1672 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1674 },
1675 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1676 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1677 },
1678 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1680 },
1681 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1683 },
1684 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1685 },
1686 /* Motorola H24 HSPA module: */
1687 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1688 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1689 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1690 },
1691 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1692 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1693 },
1694 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1695 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1696 },
1697 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1698 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1699 },
1700 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1701 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1702 },
1703 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1704 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1705 },
1706 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1707 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1708 },
1709
1710 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1711 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1712 data interface instead of
1713 communications interface.
1714 Maybe we should define a new
1715 quirk for this. */
1716 },
1717 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1718 .driver_info = NO_UNION_NORMAL,
1719 },
1720 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1721 .driver_info = NO_UNION_NORMAL,
1722 },
1723 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1724 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1725 },
1726 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1727 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1728 },
1729
1730 /* Nokia S60 phones expose two ACM channels. The first is
1731 * a modem and is picked up by the standard AT-command
1732 * information below. The second is 'vendor-specific' but
1733 * is treated as a serial device at the S60 end, so we want
1734 * to expose it on Linux too. */
1735 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1737 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1739 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1740 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1741 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1743 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1744 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1746 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1747 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1750 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1751 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1753 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1754 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1755 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1756 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1757 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1758 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1762 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1764 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1765 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1766 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1767 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1768 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1771 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1776 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1777 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1782 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1787 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1792 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1793
1794 /* Support for Owen devices */
1795 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1796
1797 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1798
1799 /* Support Lego NXT using pbLua firmware */
1800 { USB_DEVICE(0x0694, 0xff00),
1801 .driver_info = NOT_A_MODEM,
1802 },
1803
1804 /* Support for Droids MuIn LCD */
1805 { USB_DEVICE(0x04d8, 0x000b),
1806 .driver_info = NO_DATA_INTERFACE,
1807 },
1808
1809 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1810 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1811 .driver_info = IGNORE_DEVICE,
1812 },
1813 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1814 .driver_info = IGNORE_DEVICE,
1815 },
1816 #endif
1817
1818 /* control interfaces without any protocol set */
1819 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1820 USB_CDC_PROTO_NONE) },
1821
1822 /* control interfaces with various AT-command sets */
1823 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1824 USB_CDC_ACM_PROTO_AT_V25TER) },
1825 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1826 USB_CDC_ACM_PROTO_AT_PCCA101) },
1827 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1828 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1829 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1830 USB_CDC_ACM_PROTO_AT_GSM) },
1831 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1832 USB_CDC_ACM_PROTO_AT_3G) },
1833 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1834 USB_CDC_ACM_PROTO_AT_CDMA) },
1835
1836 { }
1837 };
1838
1839 MODULE_DEVICE_TABLE(usb, acm_ids);
1840
1841 static struct usb_driver acm_driver = {
1842 .name = "cdc_acm",
1843 .probe = acm_probe,
1844 .disconnect = acm_disconnect,
1845 #ifdef CONFIG_PM
1846 .suspend = acm_suspend,
1847 .resume = acm_resume,
1848 .reset_resume = acm_reset_resume,
1849 #endif
1850 .id_table = acm_ids,
1851 #ifdef CONFIG_PM
1852 .supports_autosuspend = 1,
1853 #endif
1854 .disable_hub_initiated_lpm = 1,
1855 };
1856
1857 /*
1858 * TTY driver structures.
1859 */
1860
1861 static const struct tty_operations acm_ops = {
1862 .install = acm_tty_install,
1863 .open = acm_tty_open,
1864 .close = acm_tty_close,
1865 .cleanup = acm_tty_cleanup,
1866 .hangup = acm_tty_hangup,
1867 .write = acm_tty_write,
1868 .write_room = acm_tty_write_room,
1869 .ioctl = acm_tty_ioctl,
1870 .throttle = acm_tty_throttle,
1871 .unthrottle = acm_tty_unthrottle,
1872 .chars_in_buffer = acm_tty_chars_in_buffer,
1873 .break_ctl = acm_tty_break_ctl,
1874 .set_termios = acm_tty_set_termios,
1875 .tiocmget = acm_tty_tiocmget,
1876 .tiocmset = acm_tty_tiocmset,
1877 };
1878
1879 /*
1880 * Init / exit.
1881 */
1882
1883 static int __init acm_init(void)
1884 {
1885 int retval;
1886 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1887 if (!acm_tty_driver)
1888 return -ENOMEM;
1889 acm_tty_driver->driver_name = "acm",
1890 acm_tty_driver->name = "ttyACM",
1891 acm_tty_driver->major = ACM_TTY_MAJOR,
1892 acm_tty_driver->minor_start = 0,
1893 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1894 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1895 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1896 acm_tty_driver->init_termios = tty_std_termios;
1897 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1898 HUPCL | CLOCAL;
1899 tty_set_operations(acm_tty_driver, &acm_ops);
1900
1901 retval = tty_register_driver(acm_tty_driver);
1902 if (retval) {
1903 put_tty_driver(acm_tty_driver);
1904 return retval;
1905 }
1906
1907 retval = usb_register(&acm_driver);
1908 if (retval) {
1909 tty_unregister_driver(acm_tty_driver);
1910 put_tty_driver(acm_tty_driver);
1911 return retval;
1912 }
1913
1914 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1915
1916 return 0;
1917 }
1918
1919 static void __exit acm_exit(void)
1920 {
1921 usb_deregister(&acm_driver);
1922 tty_unregister_driver(acm_tty_driver);
1923 put_tty_driver(acm_tty_driver);
1924 }
1925
1926 module_init(acm_init);
1927 module_exit(acm_exit);
1928
1929 MODULE_AUTHOR(DRIVER_AUTHOR);
1930 MODULE_DESCRIPTION(DRIVER_DESC);
1931 MODULE_LICENSE("GPL");
1932 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
(deprecated) Btrfs devel tree