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[mirror_ubuntu-zesty-kernel.git] / drivers / usb / class / cdc-acm.c
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/idr.h>
50 #include <linux/list.h>
51
52 #include "cdc-acm.h"
53
54
55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
57
58 static struct usb_driver acm_driver;
59 static struct tty_driver *acm_tty_driver;
60
61 static DEFINE_IDR(acm_minors);
62 static DEFINE_MUTEX(acm_minors_lock);
63
64 static void acm_tty_set_termios(struct tty_struct *tty,
65 struct ktermios *termios_old);
66
67 /*
68 * acm_minors accessors
69 */
70
71 /*
72 * Look up an ACM structure by minor. If found and not disconnected, increment
73 * its refcount and return it with its mutex held.
74 */
75 static struct acm *acm_get_by_minor(unsigned int minor)
76 {
77 struct acm *acm;
78
79 mutex_lock(&acm_minors_lock);
80 acm = idr_find(&acm_minors, minor);
81 if (acm) {
82 mutex_lock(&acm->mutex);
83 if (acm->disconnected) {
84 mutex_unlock(&acm->mutex);
85 acm = NULL;
86 } else {
87 tty_port_get(&acm->port);
88 mutex_unlock(&acm->mutex);
89 }
90 }
91 mutex_unlock(&acm_minors_lock);
92 return acm;
93 }
94
95 /*
96 * Try to find an available minor number and if found, associate it with 'acm'.
97 */
98 static int acm_alloc_minor(struct acm *acm)
99 {
100 int minor;
101
102 mutex_lock(&acm_minors_lock);
103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
104 mutex_unlock(&acm_minors_lock);
105
106 return minor;
107 }
108
109 /* Release the minor number associated with 'acm'. */
110 static void acm_release_minor(struct acm *acm)
111 {
112 mutex_lock(&acm_minors_lock);
113 idr_remove(&acm_minors, acm->minor);
114 mutex_unlock(&acm_minors_lock);
115 }
116
117 /*
118 * Functions for ACM control messages.
119 */
120
121 static int acm_ctrl_msg(struct acm *acm, int request, int value,
122 void *buf, int len)
123 {
124 int retval;
125
126 retval = usb_autopm_get_interface(acm->control);
127 if (retval)
128 return retval;
129
130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
131 request, USB_RT_ACM, value,
132 acm->control->altsetting[0].desc.bInterfaceNumber,
133 buf, len, 5000);
134
135 dev_dbg(&acm->control->dev,
136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__, request, value, len, retval);
138
139 usb_autopm_put_interface(acm->control);
140
141 return retval < 0 ? retval : 0;
142 }
143
144 /* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
146 */
147 static inline int acm_set_control(struct acm *acm, int control)
148 {
149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
150 return -EOPNOTSUPP;
151
152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
153 control, NULL, 0);
154 }
155
156 #define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158 #define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
160
161 /*
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
166 static int acm_wb_alloc(struct acm *acm)
167 {
168 int i, wbn;
169 struct acm_wb *wb;
170
171 wbn = 0;
172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 return wbn;
178 }
179 wbn = (wbn + 1) % ACM_NW;
180 if (++i >= ACM_NW)
181 return -1;
182 }
183 }
184
185 static int acm_wb_is_avail(struct acm *acm)
186 {
187 int i, n;
188 unsigned long flags;
189
190 n = ACM_NW;
191 spin_lock_irqsave(&acm->write_lock, flags);
192 for (i = 0; i < ACM_NW; i++)
193 n -= acm->wb[i].use;
194 spin_unlock_irqrestore(&acm->write_lock, flags);
195 return n;
196 }
197
198 /*
199 * Finish write. Caller must hold acm->write_lock
200 */
201 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
202 {
203 wb->use = 0;
204 acm->transmitting--;
205 usb_autopm_put_interface_async(acm->control);
206 }
207
208 /*
209 * Poke write.
210 *
211 * the caller is responsible for locking
212 */
213
214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
215 {
216 int rc;
217
218 acm->transmitting++;
219
220 wb->urb->transfer_buffer = wb->buf;
221 wb->urb->transfer_dma = wb->dmah;
222 wb->urb->transfer_buffer_length = wb->len;
223 wb->urb->dev = acm->dev;
224
225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
226 if (rc < 0) {
227 dev_err(&acm->data->dev,
228 "%s - usb_submit_urb(write bulk) failed: %d\n",
229 __func__, rc);
230 acm_write_done(acm, wb);
231 }
232 return rc;
233 }
234
235 /*
236 * attributes exported through sysfs
237 */
238 static ssize_t show_caps
239 (struct device *dev, struct device_attribute *attr, char *buf)
240 {
241 struct usb_interface *intf = to_usb_interface(dev);
242 struct acm *acm = usb_get_intfdata(intf);
243
244 return sprintf(buf, "%d", acm->ctrl_caps);
245 }
246 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
247
248 static ssize_t show_country_codes
249 (struct device *dev, struct device_attribute *attr, char *buf)
250 {
251 struct usb_interface *intf = to_usb_interface(dev);
252 struct acm *acm = usb_get_intfdata(intf);
253
254 memcpy(buf, acm->country_codes, acm->country_code_size);
255 return acm->country_code_size;
256 }
257
258 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
259
260 static ssize_t show_country_rel_date
261 (struct device *dev, struct device_attribute *attr, char *buf)
262 {
263 struct usb_interface *intf = to_usb_interface(dev);
264 struct acm *acm = usb_get_intfdata(intf);
265
266 return sprintf(buf, "%d", acm->country_rel_date);
267 }
268
269 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
270 /*
271 * Interrupt handlers for various ACM device responses
272 */
273
274 /* control interface reports status changes with "interrupt" transfers */
275 static void acm_ctrl_irq(struct urb *urb)
276 {
277 struct acm *acm = urb->context;
278 struct usb_cdc_notification *dr = urb->transfer_buffer;
279 unsigned char *data;
280 int newctrl;
281 int difference;
282 int retval;
283 int status = urb->status;
284
285 switch (status) {
286 case 0:
287 /* success */
288 break;
289 case -ECONNRESET:
290 case -ENOENT:
291 case -ESHUTDOWN:
292 /* this urb is terminated, clean up */
293 dev_dbg(&acm->control->dev,
294 "%s - urb shutting down with status: %d\n",
295 __func__, status);
296 return;
297 default:
298 dev_dbg(&acm->control->dev,
299 "%s - nonzero urb status received: %d\n",
300 __func__, status);
301 goto exit;
302 }
303
304 usb_mark_last_busy(acm->dev);
305
306 data = (unsigned char *)(dr + 1);
307 switch (dr->bNotificationType) {
308 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
310 __func__, dr->wValue);
311 break;
312
313 case USB_CDC_NOTIFY_SERIAL_STATE:
314 newctrl = get_unaligned_le16(data);
315
316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
317 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
318 __func__);
319 tty_port_tty_hangup(&acm->port, false);
320 }
321
322 difference = acm->ctrlin ^ newctrl;
323 spin_lock(&acm->read_lock);
324 acm->ctrlin = newctrl;
325 acm->oldcount = acm->iocount;
326
327 if (difference & ACM_CTRL_DSR)
328 acm->iocount.dsr++;
329 if (difference & ACM_CTRL_BRK)
330 acm->iocount.brk++;
331 if (difference & ACM_CTRL_RI)
332 acm->iocount.rng++;
333 if (difference & ACM_CTRL_DCD)
334 acm->iocount.dcd++;
335 if (difference & ACM_CTRL_FRAMING)
336 acm->iocount.frame++;
337 if (difference & ACM_CTRL_PARITY)
338 acm->iocount.parity++;
339 if (difference & ACM_CTRL_OVERRUN)
340 acm->iocount.overrun++;
341 spin_unlock(&acm->read_lock);
342
343 if (difference)
344 wake_up_all(&acm->wioctl);
345
346 break;
347
348 default:
349 dev_dbg(&acm->control->dev,
350 "%s - unknown notification %d received: index %d "
351 "len %d data0 %d data1 %d\n",
352 __func__,
353 dr->bNotificationType, dr->wIndex,
354 dr->wLength, data[0], data[1]);
355 break;
356 }
357 exit:
358 retval = usb_submit_urb(urb, GFP_ATOMIC);
359 if (retval && retval != -EPERM)
360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
361 __func__, retval);
362 }
363
364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
365 {
366 int res;
367
368 if (!test_and_clear_bit(index, &acm->read_urbs_free))
369 return 0;
370
371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
372
373 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
374 if (res) {
375 if (res != -EPERM) {
376 dev_err(&acm->data->dev,
377 "%s - usb_submit_urb failed: %d\n",
378 __func__, res);
379 }
380 set_bit(index, &acm->read_urbs_free);
381 return res;
382 }
383
384 return 0;
385 }
386
387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
388 {
389 int res;
390 int i;
391
392 for (i = 0; i < acm->rx_buflimit; ++i) {
393 res = acm_submit_read_urb(acm, i, mem_flags);
394 if (res)
395 return res;
396 }
397
398 return 0;
399 }
400
401 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
402 {
403 if (!urb->actual_length)
404 return;
405
406 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
407 urb->actual_length);
408 tty_flip_buffer_push(&acm->port);
409 }
410
411 static void acm_read_bulk_callback(struct urb *urb)
412 {
413 struct acm_rb *rb = urb->context;
414 struct acm *acm = rb->instance;
415 unsigned long flags;
416 int status = urb->status;
417
418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
419 rb->index, urb->actual_length);
420
421 if (!acm->dev) {
422 set_bit(rb->index, &acm->read_urbs_free);
423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
424 return;
425 }
426
427 if (status) {
428 set_bit(rb->index, &acm->read_urbs_free);
429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
430 __func__, status);
431 return;
432 }
433
434 usb_mark_last_busy(acm->dev);
435
436 acm_process_read_urb(acm, urb);
437 /*
438 * Unthrottle may run on another CPU which needs to see events
439 * in the same order. Submission has an implict barrier
440 */
441 smp_mb__before_atomic();
442 set_bit(rb->index, &acm->read_urbs_free);
443
444 /* throttle device if requested by tty */
445 spin_lock_irqsave(&acm->read_lock, flags);
446 acm->throttled = acm->throttle_req;
447 if (!acm->throttled) {
448 spin_unlock_irqrestore(&acm->read_lock, flags);
449 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
450 } else {
451 spin_unlock_irqrestore(&acm->read_lock, flags);
452 }
453 }
454
455 /* data interface wrote those outgoing bytes */
456 static void acm_write_bulk(struct urb *urb)
457 {
458 struct acm_wb *wb = urb->context;
459 struct acm *acm = wb->instance;
460 unsigned long flags;
461 int status = urb->status;
462
463 if (status || (urb->actual_length != urb->transfer_buffer_length))
464 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
465 __func__,
466 urb->actual_length,
467 urb->transfer_buffer_length,
468 status);
469
470 spin_lock_irqsave(&acm->write_lock, flags);
471 acm_write_done(acm, wb);
472 spin_unlock_irqrestore(&acm->write_lock, flags);
473 schedule_work(&acm->work);
474 }
475
476 static void acm_softint(struct work_struct *work)
477 {
478 struct acm *acm = container_of(work, struct acm, work);
479
480 dev_vdbg(&acm->data->dev, "%s\n", __func__);
481
482 tty_port_tty_wakeup(&acm->port);
483 }
484
485 /*
486 * TTY handlers
487 */
488
489 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
490 {
491 struct acm *acm;
492 int retval;
493
494 dev_dbg(tty->dev, "%s\n", __func__);
495
496 acm = acm_get_by_minor(tty->index);
497 if (!acm)
498 return -ENODEV;
499
500 retval = tty_standard_install(driver, tty);
501 if (retval)
502 goto error_init_termios;
503
504 tty->driver_data = acm;
505
506 return 0;
507
508 error_init_termios:
509 tty_port_put(&acm->port);
510 return retval;
511 }
512
513 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
514 {
515 struct acm *acm = tty->driver_data;
516
517 dev_dbg(tty->dev, "%s\n", __func__);
518
519 return tty_port_open(&acm->port, tty, filp);
520 }
521
522 static void acm_port_dtr_rts(struct tty_port *port, int raise)
523 {
524 struct acm *acm = container_of(port, struct acm, port);
525 int val;
526 int res;
527
528 if (raise)
529 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
530 else
531 val = 0;
532
533 /* FIXME: add missing ctrlout locking throughout driver */
534 acm->ctrlout = val;
535
536 res = acm_set_control(acm, val);
537 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
538 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
539 }
540
541 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
542 {
543 struct acm *acm = container_of(port, struct acm, port);
544 int retval = -ENODEV;
545 int i;
546
547 dev_dbg(&acm->control->dev, "%s\n", __func__);
548
549 mutex_lock(&acm->mutex);
550 if (acm->disconnected)
551 goto disconnected;
552
553 retval = usb_autopm_get_interface(acm->control);
554 if (retval)
555 goto error_get_interface;
556
557 /*
558 * FIXME: Why do we need this? Allocating 64K of physically contiguous
559 * memory is really nasty...
560 */
561 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
562 acm->control->needs_remote_wakeup = 1;
563
564 acm->ctrlurb->dev = acm->dev;
565 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
566 if (retval) {
567 dev_err(&acm->control->dev,
568 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
569 goto error_submit_urb;
570 }
571
572 acm_tty_set_termios(tty, NULL);
573
574 /*
575 * Unthrottle device in case the TTY was closed while throttled.
576 */
577 spin_lock_irq(&acm->read_lock);
578 acm->throttled = 0;
579 acm->throttle_req = 0;
580 spin_unlock_irq(&acm->read_lock);
581
582 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
583 if (retval)
584 goto error_submit_read_urbs;
585
586 usb_autopm_put_interface(acm->control);
587
588 mutex_unlock(&acm->mutex);
589
590 return 0;
591
592 error_submit_read_urbs:
593 for (i = 0; i < acm->rx_buflimit; i++)
594 usb_kill_urb(acm->read_urbs[i]);
595 usb_kill_urb(acm->ctrlurb);
596 error_submit_urb:
597 usb_autopm_put_interface(acm->control);
598 error_get_interface:
599 disconnected:
600 mutex_unlock(&acm->mutex);
601
602 return usb_translate_errors(retval);
603 }
604
605 static void acm_port_destruct(struct tty_port *port)
606 {
607 struct acm *acm = container_of(port, struct acm, port);
608
609 dev_dbg(&acm->control->dev, "%s\n", __func__);
610
611 acm_release_minor(acm);
612 usb_put_intf(acm->control);
613 kfree(acm->country_codes);
614 kfree(acm);
615 }
616
617 static void acm_port_shutdown(struct tty_port *port)
618 {
619 struct acm *acm = container_of(port, struct acm, port);
620 struct urb *urb;
621 struct acm_wb *wb;
622 int i;
623
624 dev_dbg(&acm->control->dev, "%s\n", __func__);
625
626 /*
627 * Need to grab write_lock to prevent race with resume, but no need to
628 * hold it due to the tty-port initialised flag.
629 */
630 spin_lock_irq(&acm->write_lock);
631 spin_unlock_irq(&acm->write_lock);
632
633 usb_autopm_get_interface_no_resume(acm->control);
634 acm->control->needs_remote_wakeup = 0;
635 usb_autopm_put_interface(acm->control);
636
637 for (;;) {
638 urb = usb_get_from_anchor(&acm->delayed);
639 if (!urb)
640 break;
641 wb = urb->context;
642 wb->use = 0;
643 usb_autopm_put_interface_async(acm->control);
644 }
645
646 usb_kill_urb(acm->ctrlurb);
647 for (i = 0; i < ACM_NW; i++)
648 usb_kill_urb(acm->wb[i].urb);
649 for (i = 0; i < acm->rx_buflimit; i++)
650 usb_kill_urb(acm->read_urbs[i]);
651 }
652
653 static void acm_tty_cleanup(struct tty_struct *tty)
654 {
655 struct acm *acm = tty->driver_data;
656 dev_dbg(&acm->control->dev, "%s\n", __func__);
657 tty_port_put(&acm->port);
658 }
659
660 static void acm_tty_hangup(struct tty_struct *tty)
661 {
662 struct acm *acm = tty->driver_data;
663 dev_dbg(&acm->control->dev, "%s\n", __func__);
664 tty_port_hangup(&acm->port);
665 }
666
667 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
668 {
669 struct acm *acm = tty->driver_data;
670 dev_dbg(&acm->control->dev, "%s\n", __func__);
671 tty_port_close(&acm->port, tty, filp);
672 }
673
674 static int acm_tty_write(struct tty_struct *tty,
675 const unsigned char *buf, int count)
676 {
677 struct acm *acm = tty->driver_data;
678 int stat;
679 unsigned long flags;
680 int wbn;
681 struct acm_wb *wb;
682
683 if (!count)
684 return 0;
685
686 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
687
688 spin_lock_irqsave(&acm->write_lock, flags);
689 wbn = acm_wb_alloc(acm);
690 if (wbn < 0) {
691 spin_unlock_irqrestore(&acm->write_lock, flags);
692 return 0;
693 }
694 wb = &acm->wb[wbn];
695
696 if (!acm->dev) {
697 wb->use = 0;
698 spin_unlock_irqrestore(&acm->write_lock, flags);
699 return -ENODEV;
700 }
701
702 count = (count > acm->writesize) ? acm->writesize : count;
703 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
704 memcpy(wb->buf, buf, count);
705 wb->len = count;
706
707 stat = usb_autopm_get_interface_async(acm->control);
708 if (stat) {
709 wb->use = 0;
710 spin_unlock_irqrestore(&acm->write_lock, flags);
711 return stat;
712 }
713
714 if (acm->susp_count) {
715 usb_anchor_urb(wb->urb, &acm->delayed);
716 spin_unlock_irqrestore(&acm->write_lock, flags);
717 return count;
718 }
719
720 stat = acm_start_wb(acm, wb);
721 spin_unlock_irqrestore(&acm->write_lock, flags);
722
723 if (stat < 0)
724 return stat;
725 return count;
726 }
727
728 static int acm_tty_write_room(struct tty_struct *tty)
729 {
730 struct acm *acm = tty->driver_data;
731 /*
732 * Do not let the line discipline to know that we have a reserve,
733 * or it might get too enthusiastic.
734 */
735 return acm_wb_is_avail(acm) ? acm->writesize : 0;
736 }
737
738 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
739 {
740 struct acm *acm = tty->driver_data;
741 /*
742 * if the device was unplugged then any remaining characters fell out
743 * of the connector ;)
744 */
745 if (acm->disconnected)
746 return 0;
747 /*
748 * This is inaccurate (overcounts), but it works.
749 */
750 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
751 }
752
753 static void acm_tty_throttle(struct tty_struct *tty)
754 {
755 struct acm *acm = tty->driver_data;
756
757 spin_lock_irq(&acm->read_lock);
758 acm->throttle_req = 1;
759 spin_unlock_irq(&acm->read_lock);
760 }
761
762 static void acm_tty_unthrottle(struct tty_struct *tty)
763 {
764 struct acm *acm = tty->driver_data;
765 unsigned int was_throttled;
766
767 spin_lock_irq(&acm->read_lock);
768 was_throttled = acm->throttled;
769 acm->throttled = 0;
770 acm->throttle_req = 0;
771 spin_unlock_irq(&acm->read_lock);
772
773 if (was_throttled)
774 acm_submit_read_urbs(acm, GFP_KERNEL);
775 }
776
777 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
778 {
779 struct acm *acm = tty->driver_data;
780 int retval;
781
782 retval = acm_send_break(acm, state ? 0xffff : 0);
783 if (retval < 0)
784 dev_dbg(&acm->control->dev, "%s - send break failed\n",
785 __func__);
786 return retval;
787 }
788
789 static int acm_tty_tiocmget(struct tty_struct *tty)
790 {
791 struct acm *acm = tty->driver_data;
792
793 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
794 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
795 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
796 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
797 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
798 TIOCM_CTS;
799 }
800
801 static int acm_tty_tiocmset(struct tty_struct *tty,
802 unsigned int set, unsigned int clear)
803 {
804 struct acm *acm = tty->driver_data;
805 unsigned int newctrl;
806
807 newctrl = acm->ctrlout;
808 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
809 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
810 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
811 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
812
813 newctrl = (newctrl & ~clear) | set;
814
815 if (acm->ctrlout == newctrl)
816 return 0;
817 return acm_set_control(acm, acm->ctrlout = newctrl);
818 }
819
820 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
821 {
822 struct serial_struct tmp;
823
824 if (!info)
825 return -EINVAL;
826
827 memset(&tmp, 0, sizeof(tmp));
828 tmp.flags = ASYNC_LOW_LATENCY;
829 tmp.xmit_fifo_size = acm->writesize;
830 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
831 tmp.close_delay = acm->port.close_delay / 10;
832 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
833 ASYNC_CLOSING_WAIT_NONE :
834 acm->port.closing_wait / 10;
835
836 if (copy_to_user(info, &tmp, sizeof(tmp)))
837 return -EFAULT;
838 else
839 return 0;
840 }
841
842 static int set_serial_info(struct acm *acm,
843 struct serial_struct __user *newinfo)
844 {
845 struct serial_struct new_serial;
846 unsigned int closing_wait, close_delay;
847 int retval = 0;
848
849 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
850 return -EFAULT;
851
852 close_delay = new_serial.close_delay * 10;
853 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
854 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
855
856 mutex_lock(&acm->port.mutex);
857
858 if (!capable(CAP_SYS_ADMIN)) {
859 if ((close_delay != acm->port.close_delay) ||
860 (closing_wait != acm->port.closing_wait))
861 retval = -EPERM;
862 else
863 retval = -EOPNOTSUPP;
864 } else {
865 acm->port.close_delay = close_delay;
866 acm->port.closing_wait = closing_wait;
867 }
868
869 mutex_unlock(&acm->port.mutex);
870 return retval;
871 }
872
873 static int wait_serial_change(struct acm *acm, unsigned long arg)
874 {
875 int rv = 0;
876 DECLARE_WAITQUEUE(wait, current);
877 struct async_icount old, new;
878
879 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
880 return -EINVAL;
881 do {
882 spin_lock_irq(&acm->read_lock);
883 old = acm->oldcount;
884 new = acm->iocount;
885 acm->oldcount = new;
886 spin_unlock_irq(&acm->read_lock);
887
888 if ((arg & TIOCM_DSR) &&
889 old.dsr != new.dsr)
890 break;
891 if ((arg & TIOCM_CD) &&
892 old.dcd != new.dcd)
893 break;
894 if ((arg & TIOCM_RI) &&
895 old.rng != new.rng)
896 break;
897
898 add_wait_queue(&acm->wioctl, &wait);
899 set_current_state(TASK_INTERRUPTIBLE);
900 schedule();
901 remove_wait_queue(&acm->wioctl, &wait);
902 if (acm->disconnected) {
903 if (arg & TIOCM_CD)
904 break;
905 else
906 rv = -ENODEV;
907 } else {
908 if (signal_pending(current))
909 rv = -ERESTARTSYS;
910 }
911 } while (!rv);
912
913
914
915 return rv;
916 }
917
918 static int get_serial_usage(struct acm *acm,
919 struct serial_icounter_struct __user *count)
920 {
921 struct serial_icounter_struct icount;
922 int rv = 0;
923
924 memset(&icount, 0, sizeof(icount));
925 icount.dsr = acm->iocount.dsr;
926 icount.rng = acm->iocount.rng;
927 icount.dcd = acm->iocount.dcd;
928 icount.frame = acm->iocount.frame;
929 icount.overrun = acm->iocount.overrun;
930 icount.parity = acm->iocount.parity;
931 icount.brk = acm->iocount.brk;
932
933 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
934 rv = -EFAULT;
935
936 return rv;
937 }
938
939 static int acm_tty_ioctl(struct tty_struct *tty,
940 unsigned int cmd, unsigned long arg)
941 {
942 struct acm *acm = tty->driver_data;
943 int rv = -ENOIOCTLCMD;
944
945 switch (cmd) {
946 case TIOCGSERIAL: /* gets serial port data */
947 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
948 break;
949 case TIOCSSERIAL:
950 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
951 break;
952 case TIOCMIWAIT:
953 rv = usb_autopm_get_interface(acm->control);
954 if (rv < 0) {
955 rv = -EIO;
956 break;
957 }
958 rv = wait_serial_change(acm, arg);
959 usb_autopm_put_interface(acm->control);
960 break;
961 case TIOCGICOUNT:
962 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
963 break;
964 }
965
966 return rv;
967 }
968
969 static void acm_tty_set_termios(struct tty_struct *tty,
970 struct ktermios *termios_old)
971 {
972 struct acm *acm = tty->driver_data;
973 struct ktermios *termios = &tty->termios;
974 struct usb_cdc_line_coding newline;
975 int newctrl = acm->ctrlout;
976
977 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
978 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
979 newline.bParityType = termios->c_cflag & PARENB ?
980 (termios->c_cflag & PARODD ? 1 : 2) +
981 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
982 switch (termios->c_cflag & CSIZE) {
983 case CS5:
984 newline.bDataBits = 5;
985 break;
986 case CS6:
987 newline.bDataBits = 6;
988 break;
989 case CS7:
990 newline.bDataBits = 7;
991 break;
992 case CS8:
993 default:
994 newline.bDataBits = 8;
995 break;
996 }
997 /* FIXME: Needs to clear unsupported bits in the termios */
998 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
999
1000 if (C_BAUD(tty) == B0) {
1001 newline.dwDTERate = acm->line.dwDTERate;
1002 newctrl &= ~ACM_CTRL_DTR;
1003 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1004 newctrl |= ACM_CTRL_DTR;
1005 }
1006
1007 if (newctrl != acm->ctrlout)
1008 acm_set_control(acm, acm->ctrlout = newctrl);
1009
1010 if (memcmp(&acm->line, &newline, sizeof newline)) {
1011 memcpy(&acm->line, &newline, sizeof newline);
1012 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1013 __func__,
1014 le32_to_cpu(newline.dwDTERate),
1015 newline.bCharFormat, newline.bParityType,
1016 newline.bDataBits);
1017 acm_set_line(acm, &acm->line);
1018 }
1019 }
1020
1021 static const struct tty_port_operations acm_port_ops = {
1022 .dtr_rts = acm_port_dtr_rts,
1023 .shutdown = acm_port_shutdown,
1024 .activate = acm_port_activate,
1025 .destruct = acm_port_destruct,
1026 };
1027
1028 /*
1029 * USB probe and disconnect routines.
1030 */
1031
1032 /* Little helpers: write/read buffers free */
1033 static void acm_write_buffers_free(struct acm *acm)
1034 {
1035 int i;
1036 struct acm_wb *wb;
1037 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1038
1039 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1040 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1041 }
1042
1043 static void acm_read_buffers_free(struct acm *acm)
1044 {
1045 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1046 int i;
1047
1048 for (i = 0; i < acm->rx_buflimit; i++)
1049 usb_free_coherent(usb_dev, acm->readsize,
1050 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1051 }
1052
1053 /* Little helper: write buffers allocate */
1054 static int acm_write_buffers_alloc(struct acm *acm)
1055 {
1056 int i;
1057 struct acm_wb *wb;
1058
1059 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1060 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1061 &wb->dmah);
1062 if (!wb->buf) {
1063 while (i != 0) {
1064 --i;
1065 --wb;
1066 usb_free_coherent(acm->dev, acm->writesize,
1067 wb->buf, wb->dmah);
1068 }
1069 return -ENOMEM;
1070 }
1071 }
1072 return 0;
1073 }
1074
1075 static int acm_probe(struct usb_interface *intf,
1076 const struct usb_device_id *id)
1077 {
1078 struct usb_cdc_union_desc *union_header = NULL;
1079 struct usb_cdc_country_functional_desc *cfd = NULL;
1080 unsigned char *buffer = intf->altsetting->extra;
1081 int buflen = intf->altsetting->extralen;
1082 struct usb_interface *control_interface;
1083 struct usb_interface *data_interface;
1084 struct usb_endpoint_descriptor *epctrl = NULL;
1085 struct usb_endpoint_descriptor *epread = NULL;
1086 struct usb_endpoint_descriptor *epwrite = NULL;
1087 struct usb_device *usb_dev = interface_to_usbdev(intf);
1088 struct acm *acm;
1089 int minor;
1090 int ctrlsize, readsize;
1091 u8 *buf;
1092 u8 ac_management_function = 0;
1093 u8 call_management_function = 0;
1094 int call_interface_num = -1;
1095 int data_interface_num = -1;
1096 unsigned long quirks;
1097 int num_rx_buf;
1098 int i;
1099 unsigned int elength = 0;
1100 int combined_interfaces = 0;
1101 struct device *tty_dev;
1102 int rv = -ENOMEM;
1103
1104 /* normal quirks */
1105 quirks = (unsigned long)id->driver_info;
1106
1107 if (quirks == IGNORE_DEVICE)
1108 return -ENODEV;
1109
1110 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1111
1112 /* handle quirks deadly to normal probing*/
1113 if (quirks == NO_UNION_NORMAL) {
1114 data_interface = usb_ifnum_to_if(usb_dev, 1);
1115 control_interface = usb_ifnum_to_if(usb_dev, 0);
1116 goto skip_normal_probe;
1117 }
1118
1119 /* normal probing*/
1120 if (!buffer) {
1121 dev_err(&intf->dev, "Weird descriptor references\n");
1122 return -EINVAL;
1123 }
1124
1125 if (!buflen) {
1126 if (intf->cur_altsetting->endpoint &&
1127 intf->cur_altsetting->endpoint->extralen &&
1128 intf->cur_altsetting->endpoint->extra) {
1129 dev_dbg(&intf->dev,
1130 "Seeking extra descriptors on endpoint\n");
1131 buflen = intf->cur_altsetting->endpoint->extralen;
1132 buffer = intf->cur_altsetting->endpoint->extra;
1133 } else {
1134 dev_err(&intf->dev,
1135 "Zero length descriptor references\n");
1136 return -EINVAL;
1137 }
1138 }
1139
1140 while (buflen > 0) {
1141 elength = buffer[0];
1142 if (!elength) {
1143 dev_err(&intf->dev, "skipping garbage byte\n");
1144 elength = 1;
1145 goto next_desc;
1146 }
1147 if (buffer[1] != USB_DT_CS_INTERFACE) {
1148 dev_err(&intf->dev, "skipping garbage\n");
1149 goto next_desc;
1150 }
1151
1152 switch (buffer[2]) {
1153 case USB_CDC_UNION_TYPE: /* we've found it */
1154 if (elength < sizeof(struct usb_cdc_union_desc))
1155 goto next_desc;
1156 if (union_header) {
1157 dev_err(&intf->dev, "More than one "
1158 "union descriptor, skipping ...\n");
1159 goto next_desc;
1160 }
1161 union_header = (struct usb_cdc_union_desc *)buffer;
1162 break;
1163 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1164 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1165 goto next_desc;
1166 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1167 break;
1168 case USB_CDC_HEADER_TYPE: /* maybe check version */
1169 break; /* for now we ignore it */
1170 case USB_CDC_ACM_TYPE:
1171 if (elength < 4)
1172 goto next_desc;
1173 ac_management_function = buffer[3];
1174 break;
1175 case USB_CDC_CALL_MANAGEMENT_TYPE:
1176 if (elength < 5)
1177 goto next_desc;
1178 call_management_function = buffer[3];
1179 call_interface_num = buffer[4];
1180 break;
1181 default:
1182 /*
1183 * there are LOTS more CDC descriptors that
1184 * could legitimately be found here.
1185 */
1186 dev_dbg(&intf->dev, "Ignoring descriptor: "
1187 "type %02x, length %ud\n",
1188 buffer[2], elength);
1189 break;
1190 }
1191 next_desc:
1192 buflen -= elength;
1193 buffer += elength;
1194 }
1195
1196 if (!union_header) {
1197 if (call_interface_num > 0) {
1198 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1199 /* quirks for Droids MuIn LCD */
1200 if (quirks & NO_DATA_INTERFACE)
1201 data_interface = usb_ifnum_to_if(usb_dev, 0);
1202 else
1203 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1204 control_interface = intf;
1205 } else {
1206 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1207 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1208 return -ENODEV;
1209 } else {
1210 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1211 combined_interfaces = 1;
1212 control_interface = data_interface = intf;
1213 goto look_for_collapsed_interface;
1214 }
1215 }
1216 } else {
1217 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1218 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1219 }
1220
1221 if (!control_interface || !data_interface) {
1222 dev_dbg(&intf->dev, "no interfaces\n");
1223 return -ENODEV;
1224 }
1225
1226 if (data_interface_num != call_interface_num)
1227 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1228
1229 if (control_interface == data_interface) {
1230 /* some broken devices designed for windows work this way */
1231 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1232 combined_interfaces = 1;
1233 /* a popular other OS doesn't use it */
1234 quirks |= NO_CAP_LINE;
1235 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1236 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1237 return -EINVAL;
1238 }
1239 look_for_collapsed_interface:
1240 for (i = 0; i < 3; i++) {
1241 struct usb_endpoint_descriptor *ep;
1242 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1243
1244 if (usb_endpoint_is_int_in(ep))
1245 epctrl = ep;
1246 else if (usb_endpoint_is_bulk_out(ep))
1247 epwrite = ep;
1248 else if (usb_endpoint_is_bulk_in(ep))
1249 epread = ep;
1250 else
1251 return -EINVAL;
1252 }
1253 if (!epctrl || !epread || !epwrite)
1254 return -ENODEV;
1255 else
1256 goto made_compressed_probe;
1257 }
1258
1259 skip_normal_probe:
1260
1261 /*workaround for switched interfaces */
1262 if (data_interface->cur_altsetting->desc.bInterfaceClass
1263 != CDC_DATA_INTERFACE_TYPE) {
1264 if (control_interface->cur_altsetting->desc.bInterfaceClass
1265 == CDC_DATA_INTERFACE_TYPE) {
1266 dev_dbg(&intf->dev,
1267 "Your device has switched interfaces.\n");
1268 swap(control_interface, data_interface);
1269 } else {
1270 return -EINVAL;
1271 }
1272 }
1273
1274 /* Accept probe requests only for the control interface */
1275 if (!combined_interfaces && intf != control_interface)
1276 return -ENODEV;
1277
1278 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1279 /* valid in this context */
1280 dev_dbg(&intf->dev, "The data interface isn't available\n");
1281 return -EBUSY;
1282 }
1283
1284
1285 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1286 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1287 return -EINVAL;
1288
1289 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1290 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1291 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1292
1293
1294 /* workaround for switched endpoints */
1295 if (!usb_endpoint_dir_in(epread)) {
1296 /* descriptors are swapped */
1297 dev_dbg(&intf->dev,
1298 "The data interface has switched endpoints\n");
1299 swap(epread, epwrite);
1300 }
1301 made_compressed_probe:
1302 dev_dbg(&intf->dev, "interfaces are valid\n");
1303
1304 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1305 if (acm == NULL)
1306 goto alloc_fail;
1307
1308 minor = acm_alloc_minor(acm);
1309 if (minor < 0) {
1310 dev_err(&intf->dev, "no more free acm devices\n");
1311 kfree(acm);
1312 return -ENODEV;
1313 }
1314
1315 ctrlsize = usb_endpoint_maxp(epctrl);
1316 readsize = usb_endpoint_maxp(epread) *
1317 (quirks == SINGLE_RX_URB ? 1 : 2);
1318 acm->combined_interfaces = combined_interfaces;
1319 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1320 acm->control = control_interface;
1321 acm->data = data_interface;
1322 acm->minor = minor;
1323 acm->dev = usb_dev;
1324 acm->ctrl_caps = ac_management_function;
1325 if (quirks & NO_CAP_LINE)
1326 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1327 acm->ctrlsize = ctrlsize;
1328 acm->readsize = readsize;
1329 acm->rx_buflimit = num_rx_buf;
1330 INIT_WORK(&acm->work, acm_softint);
1331 init_waitqueue_head(&acm->wioctl);
1332 spin_lock_init(&acm->write_lock);
1333 spin_lock_init(&acm->read_lock);
1334 mutex_init(&acm->mutex);
1335 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1336 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1337 if (acm->is_int_ep)
1338 acm->bInterval = epread->bInterval;
1339 tty_port_init(&acm->port);
1340 acm->port.ops = &acm_port_ops;
1341 init_usb_anchor(&acm->delayed);
1342 acm->quirks = quirks;
1343
1344 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1345 if (!buf)
1346 goto alloc_fail2;
1347 acm->ctrl_buffer = buf;
1348
1349 if (acm_write_buffers_alloc(acm) < 0)
1350 goto alloc_fail4;
1351
1352 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1353 if (!acm->ctrlurb)
1354 goto alloc_fail5;
1355
1356 for (i = 0; i < num_rx_buf; i++) {
1357 struct acm_rb *rb = &(acm->read_buffers[i]);
1358 struct urb *urb;
1359
1360 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1361 &rb->dma);
1362 if (!rb->base)
1363 goto alloc_fail6;
1364 rb->index = i;
1365 rb->instance = acm;
1366
1367 urb = usb_alloc_urb(0, GFP_KERNEL);
1368 if (!urb)
1369 goto alloc_fail6;
1370
1371 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1372 urb->transfer_dma = rb->dma;
1373 if (acm->is_int_ep) {
1374 usb_fill_int_urb(urb, acm->dev,
1375 acm->rx_endpoint,
1376 rb->base,
1377 acm->readsize,
1378 acm_read_bulk_callback, rb,
1379 acm->bInterval);
1380 } else {
1381 usb_fill_bulk_urb(urb, acm->dev,
1382 acm->rx_endpoint,
1383 rb->base,
1384 acm->readsize,
1385 acm_read_bulk_callback, rb);
1386 }
1387
1388 acm->read_urbs[i] = urb;
1389 __set_bit(i, &acm->read_urbs_free);
1390 }
1391 for (i = 0; i < ACM_NW; i++) {
1392 struct acm_wb *snd = &(acm->wb[i]);
1393
1394 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1395 if (snd->urb == NULL)
1396 goto alloc_fail7;
1397
1398 if (usb_endpoint_xfer_int(epwrite))
1399 usb_fill_int_urb(snd->urb, usb_dev,
1400 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1401 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1402 else
1403 usb_fill_bulk_urb(snd->urb, usb_dev,
1404 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1405 NULL, acm->writesize, acm_write_bulk, snd);
1406 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1407 snd->instance = acm;
1408 }
1409
1410 usb_set_intfdata(intf, acm);
1411
1412 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1413 if (i < 0)
1414 goto alloc_fail7;
1415
1416 if (cfd) { /* export the country data */
1417 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1418 if (!acm->country_codes)
1419 goto skip_countries;
1420 acm->country_code_size = cfd->bLength - 4;
1421 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1422 cfd->bLength - 4);
1423 acm->country_rel_date = cfd->iCountryCodeRelDate;
1424
1425 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1426 if (i < 0) {
1427 kfree(acm->country_codes);
1428 acm->country_codes = NULL;
1429 acm->country_code_size = 0;
1430 goto skip_countries;
1431 }
1432
1433 i = device_create_file(&intf->dev,
1434 &dev_attr_iCountryCodeRelDate);
1435 if (i < 0) {
1436 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1437 kfree(acm->country_codes);
1438 acm->country_codes = NULL;
1439 acm->country_code_size = 0;
1440 goto skip_countries;
1441 }
1442 }
1443
1444 skip_countries:
1445 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1446 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1447 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1448 /* works around buggy devices */
1449 epctrl->bInterval ? epctrl->bInterval : 16);
1450 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1451 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1452
1453 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1454
1455 acm->line.dwDTERate = cpu_to_le32(9600);
1456 acm->line.bDataBits = 8;
1457 acm_set_line(acm, &acm->line);
1458
1459 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1460 usb_set_intfdata(data_interface, acm);
1461
1462 usb_get_intf(control_interface);
1463 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1464 &control_interface->dev);
1465 if (IS_ERR(tty_dev)) {
1466 rv = PTR_ERR(tty_dev);
1467 goto alloc_fail8;
1468 }
1469
1470 if (quirks & CLEAR_HALT_CONDITIONS) {
1471 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1472 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1473 }
1474
1475 return 0;
1476 alloc_fail8:
1477 if (acm->country_codes) {
1478 device_remove_file(&acm->control->dev,
1479 &dev_attr_wCountryCodes);
1480 device_remove_file(&acm->control->dev,
1481 &dev_attr_iCountryCodeRelDate);
1482 kfree(acm->country_codes);
1483 }
1484 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1485 alloc_fail7:
1486 usb_set_intfdata(intf, NULL);
1487 for (i = 0; i < ACM_NW; i++)
1488 usb_free_urb(acm->wb[i].urb);
1489 alloc_fail6:
1490 for (i = 0; i < num_rx_buf; i++)
1491 usb_free_urb(acm->read_urbs[i]);
1492 acm_read_buffers_free(acm);
1493 usb_free_urb(acm->ctrlurb);
1494 alloc_fail5:
1495 acm_write_buffers_free(acm);
1496 alloc_fail4:
1497 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1498 alloc_fail2:
1499 acm_release_minor(acm);
1500 kfree(acm);
1501 alloc_fail:
1502 return rv;
1503 }
1504
1505 static void stop_data_traffic(struct acm *acm)
1506 {
1507 int i;
1508
1509 dev_dbg(&acm->control->dev, "%s\n", __func__);
1510
1511 usb_kill_urb(acm->ctrlurb);
1512 for (i = 0; i < ACM_NW; i++)
1513 usb_kill_urb(acm->wb[i].urb);
1514 for (i = 0; i < acm->rx_buflimit; i++)
1515 usb_kill_urb(acm->read_urbs[i]);
1516
1517 cancel_work_sync(&acm->work);
1518 }
1519
1520 static void acm_disconnect(struct usb_interface *intf)
1521 {
1522 struct acm *acm = usb_get_intfdata(intf);
1523 struct usb_device *usb_dev = interface_to_usbdev(intf);
1524 struct tty_struct *tty;
1525 int i;
1526
1527 dev_dbg(&intf->dev, "%s\n", __func__);
1528
1529 /* sibling interface is already cleaning up */
1530 if (!acm)
1531 return;
1532
1533 mutex_lock(&acm->mutex);
1534 acm->disconnected = true;
1535 if (acm->country_codes) {
1536 device_remove_file(&acm->control->dev,
1537 &dev_attr_wCountryCodes);
1538 device_remove_file(&acm->control->dev,
1539 &dev_attr_iCountryCodeRelDate);
1540 }
1541 wake_up_all(&acm->wioctl);
1542 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1543 usb_set_intfdata(acm->control, NULL);
1544 usb_set_intfdata(acm->data, NULL);
1545 mutex_unlock(&acm->mutex);
1546
1547 tty = tty_port_tty_get(&acm->port);
1548 if (tty) {
1549 tty_vhangup(tty);
1550 tty_kref_put(tty);
1551 }
1552
1553 stop_data_traffic(acm);
1554
1555 tty_unregister_device(acm_tty_driver, acm->minor);
1556
1557 usb_free_urb(acm->ctrlurb);
1558 for (i = 0; i < ACM_NW; i++)
1559 usb_free_urb(acm->wb[i].urb);
1560 for (i = 0; i < acm->rx_buflimit; i++)
1561 usb_free_urb(acm->read_urbs[i]);
1562 acm_write_buffers_free(acm);
1563 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1564 acm_read_buffers_free(acm);
1565
1566 if (!acm->combined_interfaces)
1567 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1568 acm->data : acm->control);
1569
1570 tty_port_put(&acm->port);
1571 }
1572
1573 #ifdef CONFIG_PM
1574 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1575 {
1576 struct acm *acm = usb_get_intfdata(intf);
1577 int cnt;
1578
1579 spin_lock_irq(&acm->write_lock);
1580 if (PMSG_IS_AUTO(message)) {
1581 if (acm->transmitting) {
1582 spin_unlock_irq(&acm->write_lock);
1583 return -EBUSY;
1584 }
1585 }
1586 cnt = acm->susp_count++;
1587 spin_unlock_irq(&acm->write_lock);
1588
1589 if (cnt)
1590 return 0;
1591
1592 stop_data_traffic(acm);
1593
1594 return 0;
1595 }
1596
1597 static int acm_resume(struct usb_interface *intf)
1598 {
1599 struct acm *acm = usb_get_intfdata(intf);
1600 struct urb *urb;
1601 int rv = 0;
1602
1603 spin_lock_irq(&acm->write_lock);
1604
1605 if (--acm->susp_count)
1606 goto out;
1607
1608 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1609 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1610
1611 for (;;) {
1612 urb = usb_get_from_anchor(&acm->delayed);
1613 if (!urb)
1614 break;
1615
1616 acm_start_wb(acm, urb->context);
1617 }
1618
1619 /*
1620 * delayed error checking because we must
1621 * do the write path at all cost
1622 */
1623 if (rv < 0)
1624 goto out;
1625
1626 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1627 }
1628 out:
1629 spin_unlock_irq(&acm->write_lock);
1630
1631 return rv;
1632 }
1633
1634 static int acm_reset_resume(struct usb_interface *intf)
1635 {
1636 struct acm *acm = usb_get_intfdata(intf);
1637
1638 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1639 tty_port_tty_hangup(&acm->port, false);
1640
1641 return acm_resume(intf);
1642 }
1643
1644 #endif /* CONFIG_PM */
1645
1646 #define NOKIA_PCSUITE_ACM_INFO(x) \
1647 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1648 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1649 USB_CDC_ACM_PROTO_VENDOR)
1650
1651 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1652 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1653 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1654 USB_CDC_ACM_PROTO_VENDOR)
1655
1656 /*
1657 * USB driver structure.
1658 */
1659
1660 static const struct usb_device_id acm_ids[] = {
1661 /* quirky and broken devices */
1662 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1663 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1664 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1665 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1666 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
1669 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1671 },
1672 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1674 },
1675 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1676 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1677 },
1678 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1680 },
1681 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1682 .driver_info = SINGLE_RX_URB,
1683 },
1684 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1685 .driver_info = SINGLE_RX_URB, /* firmware bug */
1686 },
1687 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1688 .driver_info = SINGLE_RX_URB, /* firmware bug */
1689 },
1690 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1692 },
1693 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1695 },
1696 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1698 },
1699 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1701 },
1702 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1704 },
1705 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1706 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1707 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1708 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1709 },
1710 /* Motorola H24 HSPA module: */
1711 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1712 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1713 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1714 },
1715 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1716 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1717 },
1718 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1720 },
1721 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1723 },
1724 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1725 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1726 },
1727 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1728 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1729 },
1730 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1731 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1732 },
1733
1734 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1735 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1736 data interface instead of
1737 communications interface.
1738 Maybe we should define a new
1739 quirk for this. */
1740 },
1741 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1742 .driver_info = NO_UNION_NORMAL,
1743 },
1744 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1745 .driver_info = NO_UNION_NORMAL,
1746 },
1747 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1748 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1749 },
1750 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1751 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1752 },
1753
1754 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1755 .driver_info = CLEAR_HALT_CONDITIONS,
1756 },
1757
1758 /* Nokia S60 phones expose two ACM channels. The first is
1759 * a modem and is picked up by the standard AT-command
1760 * information below. The second is 'vendor-specific' but
1761 * is treated as a serial device at the S60 end, so we want
1762 * to expose it on Linux too. */
1763 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1764 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1765 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1766 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1768 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1778 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1781 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1783 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1784 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1786 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1787 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1792 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1794 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1795 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1796 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1799 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1802 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1805 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1810 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1811 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1812 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1813 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1815 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1820 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1821
1822 /* Support for Owen devices */
1823 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1824
1825 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1826
1827 /* Support for Droids MuIn LCD */
1828 { USB_DEVICE(0x04d8, 0x000b),
1829 .driver_info = NO_DATA_INTERFACE,
1830 },
1831
1832 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1833 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1834 .driver_info = IGNORE_DEVICE,
1835 },
1836 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1837 .driver_info = IGNORE_DEVICE,
1838 },
1839 #endif
1840
1841 /* Exclude Infineon Flash Loader utility */
1842 { USB_DEVICE(0x058b, 0x0041),
1843 .driver_info = IGNORE_DEVICE,
1844 },
1845
1846 /* control interfaces without any protocol set */
1847 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1848 USB_CDC_PROTO_NONE) },
1849
1850 /* control interfaces with various AT-command sets */
1851 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1852 USB_CDC_ACM_PROTO_AT_V25TER) },
1853 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1854 USB_CDC_ACM_PROTO_AT_PCCA101) },
1855 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1856 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1857 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1858 USB_CDC_ACM_PROTO_AT_GSM) },
1859 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1860 USB_CDC_ACM_PROTO_AT_3G) },
1861 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1862 USB_CDC_ACM_PROTO_AT_CDMA) },
1863
1864 { }
1865 };
1866
1867 MODULE_DEVICE_TABLE(usb, acm_ids);
1868
1869 static struct usb_driver acm_driver = {
1870 .name = "cdc_acm",
1871 .probe = acm_probe,
1872 .disconnect = acm_disconnect,
1873 #ifdef CONFIG_PM
1874 .suspend = acm_suspend,
1875 .resume = acm_resume,
1876 .reset_resume = acm_reset_resume,
1877 #endif
1878 .id_table = acm_ids,
1879 #ifdef CONFIG_PM
1880 .supports_autosuspend = 1,
1881 #endif
1882 .disable_hub_initiated_lpm = 1,
1883 };
1884
1885 /*
1886 * TTY driver structures.
1887 */
1888
1889 static const struct tty_operations acm_ops = {
1890 .install = acm_tty_install,
1891 .open = acm_tty_open,
1892 .close = acm_tty_close,
1893 .cleanup = acm_tty_cleanup,
1894 .hangup = acm_tty_hangup,
1895 .write = acm_tty_write,
1896 .write_room = acm_tty_write_room,
1897 .ioctl = acm_tty_ioctl,
1898 .throttle = acm_tty_throttle,
1899 .unthrottle = acm_tty_unthrottle,
1900 .chars_in_buffer = acm_tty_chars_in_buffer,
1901 .break_ctl = acm_tty_break_ctl,
1902 .set_termios = acm_tty_set_termios,
1903 .tiocmget = acm_tty_tiocmget,
1904 .tiocmset = acm_tty_tiocmset,
1905 };
1906
1907 /*
1908 * Init / exit.
1909 */
1910
1911 static int __init acm_init(void)
1912 {
1913 int retval;
1914 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1915 if (!acm_tty_driver)
1916 return -ENOMEM;
1917 acm_tty_driver->driver_name = "acm",
1918 acm_tty_driver->name = "ttyACM",
1919 acm_tty_driver->major = ACM_TTY_MAJOR,
1920 acm_tty_driver->minor_start = 0,
1921 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1922 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1923 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1924 acm_tty_driver->init_termios = tty_std_termios;
1925 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1926 HUPCL | CLOCAL;
1927 tty_set_operations(acm_tty_driver, &acm_ops);
1928
1929 retval = tty_register_driver(acm_tty_driver);
1930 if (retval) {
1931 put_tty_driver(acm_tty_driver);
1932 return retval;
1933 }
1934
1935 retval = usb_register(&acm_driver);
1936 if (retval) {
1937 tty_unregister_driver(acm_tty_driver);
1938 put_tty_driver(acm_tty_driver);
1939 return retval;
1940 }
1941
1942 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1943
1944 return 0;
1945 }
1946
1947 static void __exit acm_exit(void)
1948 {
1949 usb_deregister(&acm_driver);
1950 tty_unregister_driver(acm_tty_driver);
1951 put_tty_driver(acm_tty_driver);
1952 idr_destroy(&acm_minors);
1953 }
1954
1955 module_init(acm_init);
1956 module_exit(acm_exit);
1957
1958 MODULE_AUTHOR(DRIVER_AUTHOR);
1959 MODULE_DESCRIPTION(DRIVER_DESC);
1960 MODULE_LICENSE("GPL");
1961 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
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