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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-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/sched/signal.h>
36 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/slab.h>
39 #include <linux/log2.h>
40 #include <linux/tty.h>
41 #include <linux/serial.h>
42 #include <linux/tty_driver.h>
43 #include <linux/tty_flip.h>
44 #include <linux/module.h>
45 #include <linux/mutex.h>
46 #include <linux/uaccess.h>
47 #include <linux/usb.h>
48 #include <linux/usb/cdc.h>
49 #include <asm/byteorder.h>
50 #include <asm/unaligned.h>
51 #include <linux/idr.h>
52 #include <linux/list.h>
53
54 #include "cdc-acm.h"
55
56
57 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
58 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
59
60 static struct usb_driver acm_driver;
61 static struct tty_driver *acm_tty_driver;
62
63 static DEFINE_IDR(acm_minors);
64 static DEFINE_MUTEX(acm_minors_lock);
65
66 static void acm_tty_set_termios(struct tty_struct *tty,
67 struct ktermios *termios_old);
68
69 /*
70 * acm_minors accessors
71 */
72
73 /*
74 * Look up an ACM structure by minor. If found and not disconnected, increment
75 * its refcount and return it with its mutex held.
76 */
77 static struct acm *acm_get_by_minor(unsigned int minor)
78 {
79 struct acm *acm;
80
81 mutex_lock(&acm_minors_lock);
82 acm = idr_find(&acm_minors, minor);
83 if (acm) {
84 mutex_lock(&acm->mutex);
85 if (acm->disconnected) {
86 mutex_unlock(&acm->mutex);
87 acm = NULL;
88 } else {
89 tty_port_get(&acm->port);
90 mutex_unlock(&acm->mutex);
91 }
92 }
93 mutex_unlock(&acm_minors_lock);
94 return acm;
95 }
96
97 /*
98 * Try to find an available minor number and if found, associate it with 'acm'.
99 */
100 static int acm_alloc_minor(struct acm *acm)
101 {
102 int minor;
103
104 mutex_lock(&acm_minors_lock);
105 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
106 mutex_unlock(&acm_minors_lock);
107
108 return minor;
109 }
110
111 /* Release the minor number associated with 'acm'. */
112 static void acm_release_minor(struct acm *acm)
113 {
114 mutex_lock(&acm_minors_lock);
115 idr_remove(&acm_minors, acm->minor);
116 mutex_unlock(&acm_minors_lock);
117 }
118
119 /*
120 * Functions for ACM control messages.
121 */
122
123 static int acm_ctrl_msg(struct acm *acm, int request, int value,
124 void *buf, int len)
125 {
126 int retval;
127
128 retval = usb_autopm_get_interface(acm->control);
129 if (retval)
130 return retval;
131
132 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
133 request, USB_RT_ACM, value,
134 acm->control->altsetting[0].desc.bInterfaceNumber,
135 buf, len, 5000);
136
137 dev_dbg(&acm->control->dev,
138 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
139 __func__, request, value, len, retval);
140
141 usb_autopm_put_interface(acm->control);
142
143 return retval < 0 ? retval : 0;
144 }
145
146 /* devices aren't required to support these requests.
147 * the cdc acm descriptor tells whether they do...
148 */
149 static inline int acm_set_control(struct acm *acm, int control)
150 {
151 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
152 return -EOPNOTSUPP;
153
154 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
155 control, NULL, 0);
156 }
157
158 #define acm_set_line(acm, line) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
160 #define acm_send_break(acm, ms) \
161 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
162
163 static void acm_kill_urbs(struct acm *acm)
164 {
165 int i;
166
167 usb_kill_urb(acm->ctrlurb);
168 for (i = 0; i < ACM_NW; i++)
169 usb_kill_urb(acm->wb[i].urb);
170 for (i = 0; i < acm->rx_buflimit; i++)
171 usb_kill_urb(acm->read_urbs[i]);
172 }
173
174 /*
175 * Write buffer management.
176 * All of these assume proper locks taken by the caller.
177 */
178
179 static int acm_wb_alloc(struct acm *acm)
180 {
181 int i, wbn;
182 struct acm_wb *wb;
183
184 wbn = 0;
185 i = 0;
186 for (;;) {
187 wb = &acm->wb[wbn];
188 if (!wb->use) {
189 wb->use = 1;
190 return wbn;
191 }
192 wbn = (wbn + 1) % ACM_NW;
193 if (++i >= ACM_NW)
194 return -1;
195 }
196 }
197
198 static int acm_wb_is_avail(struct acm *acm)
199 {
200 int i, n;
201 unsigned long flags;
202
203 n = ACM_NW;
204 spin_lock_irqsave(&acm->write_lock, flags);
205 for (i = 0; i < ACM_NW; i++)
206 n -= acm->wb[i].use;
207 spin_unlock_irqrestore(&acm->write_lock, flags);
208 return n;
209 }
210
211 /*
212 * Finish write. Caller must hold acm->write_lock
213 */
214 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
215 {
216 wb->use = 0;
217 acm->transmitting--;
218 usb_autopm_put_interface_async(acm->control);
219 }
220
221 /*
222 * Poke write.
223 *
224 * the caller is responsible for locking
225 */
226
227 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
228 {
229 int rc;
230
231 acm->transmitting++;
232
233 wb->urb->transfer_buffer = wb->buf;
234 wb->urb->transfer_dma = wb->dmah;
235 wb->urb->transfer_buffer_length = wb->len;
236 wb->urb->dev = acm->dev;
237
238 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
239 if (rc < 0) {
240 dev_err(&acm->data->dev,
241 "%s - usb_submit_urb(write bulk) failed: %d\n",
242 __func__, rc);
243 acm_write_done(acm, wb);
244 }
245 return rc;
246 }
247
248 /*
249 * attributes exported through sysfs
250 */
251 static ssize_t show_caps
252 (struct device *dev, struct device_attribute *attr, char *buf)
253 {
254 struct usb_interface *intf = to_usb_interface(dev);
255 struct acm *acm = usb_get_intfdata(intf);
256
257 return sprintf(buf, "%d", acm->ctrl_caps);
258 }
259 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
260
261 static ssize_t show_country_codes
262 (struct device *dev, struct device_attribute *attr, char *buf)
263 {
264 struct usb_interface *intf = to_usb_interface(dev);
265 struct acm *acm = usb_get_intfdata(intf);
266
267 memcpy(buf, acm->country_codes, acm->country_code_size);
268 return acm->country_code_size;
269 }
270
271 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
272
273 static ssize_t show_country_rel_date
274 (struct device *dev, struct device_attribute *attr, char *buf)
275 {
276 struct usb_interface *intf = to_usb_interface(dev);
277 struct acm *acm = usb_get_intfdata(intf);
278
279 return sprintf(buf, "%d", acm->country_rel_date);
280 }
281
282 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
283 /*
284 * Interrupt handlers for various ACM device responses
285 */
286
287 static void acm_process_notification(struct acm *acm, unsigned char *buf)
288 {
289 int newctrl;
290 int difference;
291 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
292 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
293
294 switch (dr->bNotificationType) {
295 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
296 dev_dbg(&acm->control->dev,
297 "%s - network connection: %d\n", __func__, dr->wValue);
298 break;
299
300 case USB_CDC_NOTIFY_SERIAL_STATE:
301 if (le16_to_cpu(dr->wLength) != 2) {
302 dev_dbg(&acm->control->dev,
303 "%s - malformed serial state\n", __func__);
304 break;
305 }
306
307 newctrl = get_unaligned_le16(data);
308 dev_dbg(&acm->control->dev,
309 "%s - serial state: 0x%x\n", __func__, newctrl);
310
311 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
312 dev_dbg(&acm->control->dev,
313 "%s - calling hangup\n", __func__);
314 tty_port_tty_hangup(&acm->port, false);
315 }
316
317 difference = acm->ctrlin ^ newctrl;
318 spin_lock(&acm->read_lock);
319 acm->ctrlin = newctrl;
320 acm->oldcount = acm->iocount;
321
322 if (difference & ACM_CTRL_DSR)
323 acm->iocount.dsr++;
324 if (difference & ACM_CTRL_BRK)
325 acm->iocount.brk++;
326 if (difference & ACM_CTRL_RI)
327 acm->iocount.rng++;
328 if (difference & ACM_CTRL_DCD)
329 acm->iocount.dcd++;
330 if (difference & ACM_CTRL_FRAMING)
331 acm->iocount.frame++;
332 if (difference & ACM_CTRL_PARITY)
333 acm->iocount.parity++;
334 if (difference & ACM_CTRL_OVERRUN)
335 acm->iocount.overrun++;
336 spin_unlock(&acm->read_lock);
337
338 if (difference)
339 wake_up_all(&acm->wioctl);
340
341 break;
342
343 default:
344 dev_dbg(&acm->control->dev,
345 "%s - unknown notification %d received: index %d len %d\n",
346 __func__,
347 dr->bNotificationType, dr->wIndex, dr->wLength);
348 }
349 }
350
351 /* control interface reports status changes with "interrupt" transfers */
352 static void acm_ctrl_irq(struct urb *urb)
353 {
354 struct acm *acm = urb->context;
355 struct usb_cdc_notification *dr = urb->transfer_buffer;
356 unsigned int current_size = urb->actual_length;
357 unsigned int expected_size, copy_size, alloc_size;
358 int retval;
359 int status = urb->status;
360
361 switch (status) {
362 case 0:
363 /* success */
364 break;
365 case -ECONNRESET:
366 case -ENOENT:
367 case -ESHUTDOWN:
368 /* this urb is terminated, clean up */
369 acm->nb_index = 0;
370 dev_dbg(&acm->control->dev,
371 "%s - urb shutting down with status: %d\n",
372 __func__, status);
373 return;
374 default:
375 dev_dbg(&acm->control->dev,
376 "%s - nonzero urb status received: %d\n",
377 __func__, status);
378 goto exit;
379 }
380
381 usb_mark_last_busy(acm->dev);
382
383 if (acm->nb_index)
384 dr = (struct usb_cdc_notification *)acm->notification_buffer;
385
386 /* size = notification-header + (optional) data */
387 expected_size = sizeof(struct usb_cdc_notification) +
388 le16_to_cpu(dr->wLength);
389
390 if (current_size < expected_size) {
391 /* notification is transmitted fragmented, reassemble */
392 if (acm->nb_size < expected_size) {
393 if (acm->nb_size) {
394 kfree(acm->notification_buffer);
395 acm->nb_size = 0;
396 }
397 alloc_size = roundup_pow_of_two(expected_size);
398 /*
399 * kmalloc ensures a valid notification_buffer after a
400 * use of kfree in case the previous allocation was too
401 * small. Final freeing is done on disconnect.
402 */
403 acm->notification_buffer =
404 kmalloc(alloc_size, GFP_ATOMIC);
405 if (!acm->notification_buffer)
406 goto exit;
407 acm->nb_size = alloc_size;
408 }
409
410 copy_size = min(current_size,
411 expected_size - acm->nb_index);
412
413 memcpy(&acm->notification_buffer[acm->nb_index],
414 urb->transfer_buffer, copy_size);
415 acm->nb_index += copy_size;
416 current_size = acm->nb_index;
417 }
418
419 if (current_size >= expected_size) {
420 /* notification complete */
421 acm_process_notification(acm, (unsigned char *)dr);
422 acm->nb_index = 0;
423 }
424
425 exit:
426 retval = usb_submit_urb(urb, GFP_ATOMIC);
427 if (retval && retval != -EPERM)
428 dev_err(&acm->control->dev,
429 "%s - usb_submit_urb failed: %d\n", __func__, retval);
430 }
431
432 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
433 {
434 int res;
435
436 if (!test_and_clear_bit(index, &acm->read_urbs_free))
437 return 0;
438
439 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
440 if (res) {
441 if (res != -EPERM) {
442 dev_err(&acm->data->dev,
443 "urb %d failed submission with %d\n",
444 index, res);
445 }
446 set_bit(index, &acm->read_urbs_free);
447 return res;
448 } else {
449 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
450 }
451
452 return 0;
453 }
454
455 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
456 {
457 int res;
458 int i;
459
460 for (i = 0; i < acm->rx_buflimit; ++i) {
461 res = acm_submit_read_urb(acm, i, mem_flags);
462 if (res)
463 return res;
464 }
465
466 return 0;
467 }
468
469 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
470 {
471 if (!urb->actual_length)
472 return;
473
474 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
475 urb->actual_length);
476 tty_flip_buffer_push(&acm->port);
477 }
478
479 static void acm_read_bulk_callback(struct urb *urb)
480 {
481 struct acm_rb *rb = urb->context;
482 struct acm *acm = rb->instance;
483 unsigned long flags;
484 int status = urb->status;
485
486 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
487 rb->index, urb->actual_length, status);
488
489 set_bit(rb->index, &acm->read_urbs_free);
490
491 if (!acm->dev) {
492 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
493 return;
494 }
495
496 switch (status) {
497 case 0:
498 usb_mark_last_busy(acm->dev);
499 acm_process_read_urb(acm, urb);
500 break;
501 case -EPIPE:
502 set_bit(EVENT_RX_STALL, &acm->flags);
503 schedule_work(&acm->work);
504 return;
505 case -ENOENT:
506 case -ECONNRESET:
507 case -ESHUTDOWN:
508 dev_dbg(&acm->data->dev,
509 "%s - urb shutting down with status: %d\n",
510 __func__, status);
511 return;
512 default:
513 dev_dbg(&acm->data->dev,
514 "%s - nonzero urb status received: %d\n",
515 __func__, status);
516 break;
517 }
518
519 /*
520 * Unthrottle may run on another CPU which needs to see events
521 * in the same order. Submission has an implict barrier
522 */
523 smp_mb__before_atomic();
524
525 /* throttle device if requested by tty */
526 spin_lock_irqsave(&acm->read_lock, flags);
527 acm->throttled = acm->throttle_req;
528 if (!acm->throttled) {
529 spin_unlock_irqrestore(&acm->read_lock, flags);
530 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
531 } else {
532 spin_unlock_irqrestore(&acm->read_lock, flags);
533 }
534 }
535
536 /* data interface wrote those outgoing bytes */
537 static void acm_write_bulk(struct urb *urb)
538 {
539 struct acm_wb *wb = urb->context;
540 struct acm *acm = wb->instance;
541 unsigned long flags;
542 int status = urb->status;
543
544 if (status || (urb->actual_length != urb->transfer_buffer_length))
545 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
546 urb->actual_length,
547 urb->transfer_buffer_length,
548 status);
549
550 spin_lock_irqsave(&acm->write_lock, flags);
551 acm_write_done(acm, wb);
552 spin_unlock_irqrestore(&acm->write_lock, flags);
553 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
554 schedule_work(&acm->work);
555 }
556
557 static void acm_softint(struct work_struct *work)
558 {
559 int i;
560 struct acm *acm = container_of(work, struct acm, work);
561
562 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
563 if (!(usb_autopm_get_interface(acm->data))) {
564 for (i = 0; i < acm->rx_buflimit; i++)
565 usb_kill_urb(acm->read_urbs[i]);
566 usb_clear_halt(acm->dev, acm->in);
567 acm_submit_read_urbs(acm, GFP_KERNEL);
568 usb_autopm_put_interface(acm->data);
569 }
570 clear_bit(EVENT_RX_STALL, &acm->flags);
571 }
572
573 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) {
574 tty_port_tty_wakeup(&acm->port);
575 clear_bit(EVENT_TTY_WAKEUP, &acm->flags);
576 }
577 }
578
579 /*
580 * TTY handlers
581 */
582
583 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
584 {
585 struct acm *acm;
586 int retval;
587
588 acm = acm_get_by_minor(tty->index);
589 if (!acm)
590 return -ENODEV;
591
592 retval = tty_standard_install(driver, tty);
593 if (retval)
594 goto error_init_termios;
595
596 tty->driver_data = acm;
597
598 return 0;
599
600 error_init_termios:
601 tty_port_put(&acm->port);
602 return retval;
603 }
604
605 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
606 {
607 struct acm *acm = tty->driver_data;
608
609 return tty_port_open(&acm->port, tty, filp);
610 }
611
612 static void acm_port_dtr_rts(struct tty_port *port, int raise)
613 {
614 struct acm *acm = container_of(port, struct acm, port);
615 int val;
616 int res;
617
618 if (raise)
619 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
620 else
621 val = 0;
622
623 /* FIXME: add missing ctrlout locking throughout driver */
624 acm->ctrlout = val;
625
626 res = acm_set_control(acm, val);
627 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
628 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
629 }
630
631 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
632 {
633 struct acm *acm = container_of(port, struct acm, port);
634 int retval = -ENODEV;
635 int i;
636
637 mutex_lock(&acm->mutex);
638 if (acm->disconnected)
639 goto disconnected;
640
641 retval = usb_autopm_get_interface(acm->control);
642 if (retval)
643 goto error_get_interface;
644
645 /*
646 * FIXME: Why do we need this? Allocating 64K of physically contiguous
647 * memory is really nasty...
648 */
649 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
650 acm->control->needs_remote_wakeup = 1;
651
652 acm->ctrlurb->dev = acm->dev;
653 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
654 if (retval) {
655 dev_err(&acm->control->dev,
656 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
657 goto error_submit_urb;
658 }
659
660 acm_tty_set_termios(tty, NULL);
661
662 /*
663 * Unthrottle device in case the TTY was closed while throttled.
664 */
665 spin_lock_irq(&acm->read_lock);
666 acm->throttled = 0;
667 acm->throttle_req = 0;
668 spin_unlock_irq(&acm->read_lock);
669
670 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
671 if (retval)
672 goto error_submit_read_urbs;
673
674 usb_autopm_put_interface(acm->control);
675
676 mutex_unlock(&acm->mutex);
677
678 return 0;
679
680 error_submit_read_urbs:
681 for (i = 0; i < acm->rx_buflimit; i++)
682 usb_kill_urb(acm->read_urbs[i]);
683 usb_kill_urb(acm->ctrlurb);
684 error_submit_urb:
685 usb_autopm_put_interface(acm->control);
686 error_get_interface:
687 disconnected:
688 mutex_unlock(&acm->mutex);
689
690 return usb_translate_errors(retval);
691 }
692
693 static void acm_port_destruct(struct tty_port *port)
694 {
695 struct acm *acm = container_of(port, struct acm, port);
696
697 acm_release_minor(acm);
698 usb_put_intf(acm->control);
699 kfree(acm->country_codes);
700 kfree(acm);
701 }
702
703 static void acm_port_shutdown(struct tty_port *port)
704 {
705 struct acm *acm = container_of(port, struct acm, port);
706 struct urb *urb;
707 struct acm_wb *wb;
708
709 /*
710 * Need to grab write_lock to prevent race with resume, but no need to
711 * hold it due to the tty-port initialised flag.
712 */
713 spin_lock_irq(&acm->write_lock);
714 spin_unlock_irq(&acm->write_lock);
715
716 usb_autopm_get_interface_no_resume(acm->control);
717 acm->control->needs_remote_wakeup = 0;
718 usb_autopm_put_interface(acm->control);
719
720 for (;;) {
721 urb = usb_get_from_anchor(&acm->delayed);
722 if (!urb)
723 break;
724 wb = urb->context;
725 wb->use = 0;
726 usb_autopm_put_interface_async(acm->control);
727 }
728
729 acm_kill_urbs(acm);
730 }
731
732 static void acm_tty_cleanup(struct tty_struct *tty)
733 {
734 struct acm *acm = tty->driver_data;
735
736 tty_port_put(&acm->port);
737 }
738
739 static void acm_tty_hangup(struct tty_struct *tty)
740 {
741 struct acm *acm = tty->driver_data;
742
743 tty_port_hangup(&acm->port);
744 }
745
746 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
747 {
748 struct acm *acm = tty->driver_data;
749
750 tty_port_close(&acm->port, tty, filp);
751 }
752
753 static int acm_tty_write(struct tty_struct *tty,
754 const unsigned char *buf, int count)
755 {
756 struct acm *acm = tty->driver_data;
757 int stat;
758 unsigned long flags;
759 int wbn;
760 struct acm_wb *wb;
761
762 if (!count)
763 return 0;
764
765 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
766
767 spin_lock_irqsave(&acm->write_lock, flags);
768 wbn = acm_wb_alloc(acm);
769 if (wbn < 0) {
770 spin_unlock_irqrestore(&acm->write_lock, flags);
771 return 0;
772 }
773 wb = &acm->wb[wbn];
774
775 if (!acm->dev) {
776 wb->use = 0;
777 spin_unlock_irqrestore(&acm->write_lock, flags);
778 return -ENODEV;
779 }
780
781 count = (count > acm->writesize) ? acm->writesize : count;
782 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
783 memcpy(wb->buf, buf, count);
784 wb->len = count;
785
786 stat = usb_autopm_get_interface_async(acm->control);
787 if (stat) {
788 wb->use = 0;
789 spin_unlock_irqrestore(&acm->write_lock, flags);
790 return stat;
791 }
792
793 if (acm->susp_count) {
794 if (acm->putbuffer) {
795 /* now to preserve order */
796 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
797 acm->putbuffer = NULL;
798 }
799 usb_anchor_urb(wb->urb, &acm->delayed);
800 spin_unlock_irqrestore(&acm->write_lock, flags);
801 return count;
802 } else {
803 if (acm->putbuffer) {
804 /* at this point there is no good way to handle errors */
805 acm_start_wb(acm, acm->putbuffer);
806 acm->putbuffer = NULL;
807 }
808 }
809
810 stat = acm_start_wb(acm, wb);
811 spin_unlock_irqrestore(&acm->write_lock, flags);
812
813 if (stat < 0)
814 return stat;
815 return count;
816 }
817
818 static void acm_tty_flush_chars(struct tty_struct *tty)
819 {
820 struct acm *acm = tty->driver_data;
821 struct acm_wb *cur = acm->putbuffer;
822 int err;
823 unsigned long flags;
824
825 if (!cur) /* nothing to do */
826 return;
827
828 acm->putbuffer = NULL;
829 err = usb_autopm_get_interface_async(acm->control);
830 spin_lock_irqsave(&acm->write_lock, flags);
831 if (err < 0) {
832 cur->use = 0;
833 acm->putbuffer = cur;
834 goto out;
835 }
836
837 if (acm->susp_count)
838 usb_anchor_urb(cur->urb, &acm->delayed);
839 else
840 acm_start_wb(acm, cur);
841 out:
842 spin_unlock_irqrestore(&acm->write_lock, flags);
843 return;
844 }
845
846 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
847 {
848 struct acm *acm = tty->driver_data;
849 struct acm_wb *cur;
850 int wbn;
851 unsigned long flags;
852
853 overflow:
854 cur = acm->putbuffer;
855 if (!cur) {
856 spin_lock_irqsave(&acm->write_lock, flags);
857 wbn = acm_wb_alloc(acm);
858 if (wbn >= 0) {
859 cur = &acm->wb[wbn];
860 acm->putbuffer = cur;
861 }
862 spin_unlock_irqrestore(&acm->write_lock, flags);
863 if (!cur)
864 return 0;
865 }
866
867 if (cur->len == acm->writesize) {
868 acm_tty_flush_chars(tty);
869 goto overflow;
870 }
871
872 cur->buf[cur->len++] = ch;
873 return 1;
874 }
875
876 static int acm_tty_write_room(struct tty_struct *tty)
877 {
878 struct acm *acm = tty->driver_data;
879 /*
880 * Do not let the line discipline to know that we have a reserve,
881 * or it might get too enthusiastic.
882 */
883 return acm_wb_is_avail(acm) ? acm->writesize : 0;
884 }
885
886 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
887 {
888 struct acm *acm = tty->driver_data;
889 /*
890 * if the device was unplugged then any remaining characters fell out
891 * of the connector ;)
892 */
893 if (acm->disconnected)
894 return 0;
895 /*
896 * This is inaccurate (overcounts), but it works.
897 */
898 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
899 }
900
901 static void acm_tty_throttle(struct tty_struct *tty)
902 {
903 struct acm *acm = tty->driver_data;
904
905 spin_lock_irq(&acm->read_lock);
906 acm->throttle_req = 1;
907 spin_unlock_irq(&acm->read_lock);
908 }
909
910 static void acm_tty_unthrottle(struct tty_struct *tty)
911 {
912 struct acm *acm = tty->driver_data;
913 unsigned int was_throttled;
914
915 spin_lock_irq(&acm->read_lock);
916 was_throttled = acm->throttled;
917 acm->throttled = 0;
918 acm->throttle_req = 0;
919 spin_unlock_irq(&acm->read_lock);
920
921 if (was_throttled)
922 acm_submit_read_urbs(acm, GFP_KERNEL);
923 }
924
925 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
926 {
927 struct acm *acm = tty->driver_data;
928 int retval;
929
930 retval = acm_send_break(acm, state ? 0xffff : 0);
931 if (retval < 0)
932 dev_dbg(&acm->control->dev,
933 "%s - send break failed\n", __func__);
934 return retval;
935 }
936
937 static int acm_tty_tiocmget(struct tty_struct *tty)
938 {
939 struct acm *acm = tty->driver_data;
940
941 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
942 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
943 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
944 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
945 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
946 TIOCM_CTS;
947 }
948
949 static int acm_tty_tiocmset(struct tty_struct *tty,
950 unsigned int set, unsigned int clear)
951 {
952 struct acm *acm = tty->driver_data;
953 unsigned int newctrl;
954
955 newctrl = acm->ctrlout;
956 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
957 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
958 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
959 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
960
961 newctrl = (newctrl & ~clear) | set;
962
963 if (acm->ctrlout == newctrl)
964 return 0;
965 return acm_set_control(acm, acm->ctrlout = newctrl);
966 }
967
968 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
969 {
970 struct serial_struct tmp;
971
972 memset(&tmp, 0, sizeof(tmp));
973 tmp.xmit_fifo_size = acm->writesize;
974 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
975 tmp.close_delay = acm->port.close_delay / 10;
976 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
977 ASYNC_CLOSING_WAIT_NONE :
978 acm->port.closing_wait / 10;
979
980 if (copy_to_user(info, &tmp, sizeof(tmp)))
981 return -EFAULT;
982 else
983 return 0;
984 }
985
986 static int set_serial_info(struct acm *acm,
987 struct serial_struct __user *newinfo)
988 {
989 struct serial_struct new_serial;
990 unsigned int closing_wait, close_delay;
991 int retval = 0;
992
993 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
994 return -EFAULT;
995
996 close_delay = new_serial.close_delay * 10;
997 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
998 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
999
1000 mutex_lock(&acm->port.mutex);
1001
1002 if (!capable(CAP_SYS_ADMIN)) {
1003 if ((close_delay != acm->port.close_delay) ||
1004 (closing_wait != acm->port.closing_wait))
1005 retval = -EPERM;
1006 else
1007 retval = -EOPNOTSUPP;
1008 } else {
1009 acm->port.close_delay = close_delay;
1010 acm->port.closing_wait = closing_wait;
1011 }
1012
1013 mutex_unlock(&acm->port.mutex);
1014 return retval;
1015 }
1016
1017 static int wait_serial_change(struct acm *acm, unsigned long arg)
1018 {
1019 int rv = 0;
1020 DECLARE_WAITQUEUE(wait, current);
1021 struct async_icount old, new;
1022
1023 do {
1024 spin_lock_irq(&acm->read_lock);
1025 old = acm->oldcount;
1026 new = acm->iocount;
1027 acm->oldcount = new;
1028 spin_unlock_irq(&acm->read_lock);
1029
1030 if ((arg & TIOCM_DSR) &&
1031 old.dsr != new.dsr)
1032 break;
1033 if ((arg & TIOCM_CD) &&
1034 old.dcd != new.dcd)
1035 break;
1036 if ((arg & TIOCM_RI) &&
1037 old.rng != new.rng)
1038 break;
1039
1040 add_wait_queue(&acm->wioctl, &wait);
1041 set_current_state(TASK_INTERRUPTIBLE);
1042 schedule();
1043 remove_wait_queue(&acm->wioctl, &wait);
1044 if (acm->disconnected) {
1045 if (arg & TIOCM_CD)
1046 break;
1047 else
1048 rv = -ENODEV;
1049 } else {
1050 if (signal_pending(current))
1051 rv = -ERESTARTSYS;
1052 }
1053 } while (!rv);
1054
1055
1056
1057 return rv;
1058 }
1059
1060 static int acm_tty_get_icount(struct tty_struct *tty,
1061 struct serial_icounter_struct *icount)
1062 {
1063 struct acm *acm = tty->driver_data;
1064
1065 icount->dsr = acm->iocount.dsr;
1066 icount->rng = acm->iocount.rng;
1067 icount->dcd = acm->iocount.dcd;
1068 icount->frame = acm->iocount.frame;
1069 icount->overrun = acm->iocount.overrun;
1070 icount->parity = acm->iocount.parity;
1071 icount->brk = acm->iocount.brk;
1072
1073 return 0;
1074 }
1075
1076 static int acm_tty_ioctl(struct tty_struct *tty,
1077 unsigned int cmd, unsigned long arg)
1078 {
1079 struct acm *acm = tty->driver_data;
1080 int rv = -ENOIOCTLCMD;
1081
1082 switch (cmd) {
1083 case TIOCGSERIAL: /* gets serial port data */
1084 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1085 break;
1086 case TIOCSSERIAL:
1087 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1088 break;
1089 case TIOCMIWAIT:
1090 rv = usb_autopm_get_interface(acm->control);
1091 if (rv < 0) {
1092 rv = -EIO;
1093 break;
1094 }
1095 rv = wait_serial_change(acm, arg);
1096 usb_autopm_put_interface(acm->control);
1097 break;
1098 }
1099
1100 return rv;
1101 }
1102
1103 static void acm_tty_set_termios(struct tty_struct *tty,
1104 struct ktermios *termios_old)
1105 {
1106 struct acm *acm = tty->driver_data;
1107 struct ktermios *termios = &tty->termios;
1108 struct usb_cdc_line_coding newline;
1109 int newctrl = acm->ctrlout;
1110
1111 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1112 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1113 newline.bParityType = termios->c_cflag & PARENB ?
1114 (termios->c_cflag & PARODD ? 1 : 2) +
1115 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1116 switch (termios->c_cflag & CSIZE) {
1117 case CS5:
1118 newline.bDataBits = 5;
1119 break;
1120 case CS6:
1121 newline.bDataBits = 6;
1122 break;
1123 case CS7:
1124 newline.bDataBits = 7;
1125 break;
1126 case CS8:
1127 default:
1128 newline.bDataBits = 8;
1129 break;
1130 }
1131 /* FIXME: Needs to clear unsupported bits in the termios */
1132 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1133
1134 if (C_BAUD(tty) == B0) {
1135 newline.dwDTERate = acm->line.dwDTERate;
1136 newctrl &= ~ACM_CTRL_DTR;
1137 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1138 newctrl |= ACM_CTRL_DTR;
1139 }
1140
1141 if (newctrl != acm->ctrlout)
1142 acm_set_control(acm, acm->ctrlout = newctrl);
1143
1144 if (memcmp(&acm->line, &newline, sizeof newline)) {
1145 memcpy(&acm->line, &newline, sizeof newline);
1146 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1147 __func__,
1148 le32_to_cpu(newline.dwDTERate),
1149 newline.bCharFormat, newline.bParityType,
1150 newline.bDataBits);
1151 acm_set_line(acm, &acm->line);
1152 }
1153 }
1154
1155 static const struct tty_port_operations acm_port_ops = {
1156 .dtr_rts = acm_port_dtr_rts,
1157 .shutdown = acm_port_shutdown,
1158 .activate = acm_port_activate,
1159 .destruct = acm_port_destruct,
1160 };
1161
1162 /*
1163 * USB probe and disconnect routines.
1164 */
1165
1166 /* Little helpers: write/read buffers free */
1167 static void acm_write_buffers_free(struct acm *acm)
1168 {
1169 int i;
1170 struct acm_wb *wb;
1171
1172 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1173 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1174 }
1175
1176 static void acm_read_buffers_free(struct acm *acm)
1177 {
1178 int i;
1179
1180 for (i = 0; i < acm->rx_buflimit; i++)
1181 usb_free_coherent(acm->dev, acm->readsize,
1182 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1183 }
1184
1185 /* Little helper: write buffers allocate */
1186 static int acm_write_buffers_alloc(struct acm *acm)
1187 {
1188 int i;
1189 struct acm_wb *wb;
1190
1191 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1192 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1193 &wb->dmah);
1194 if (!wb->buf) {
1195 while (i != 0) {
1196 --i;
1197 --wb;
1198 usb_free_coherent(acm->dev, acm->writesize,
1199 wb->buf, wb->dmah);
1200 }
1201 return -ENOMEM;
1202 }
1203 }
1204 return 0;
1205 }
1206
1207 static int acm_probe(struct usb_interface *intf,
1208 const struct usb_device_id *id)
1209 {
1210 struct usb_cdc_union_desc *union_header = NULL;
1211 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1212 unsigned char *buffer = intf->altsetting->extra;
1213 int buflen = intf->altsetting->extralen;
1214 struct usb_interface *control_interface;
1215 struct usb_interface *data_interface;
1216 struct usb_endpoint_descriptor *epctrl = NULL;
1217 struct usb_endpoint_descriptor *epread = NULL;
1218 struct usb_endpoint_descriptor *epwrite = NULL;
1219 struct usb_device *usb_dev = interface_to_usbdev(intf);
1220 struct usb_cdc_parsed_header h;
1221 struct acm *acm;
1222 int minor;
1223 int ctrlsize, readsize;
1224 u8 *buf;
1225 int call_intf_num = -1;
1226 int data_intf_num = -1;
1227 unsigned long quirks;
1228 int num_rx_buf;
1229 int i;
1230 int combined_interfaces = 0;
1231 struct device *tty_dev;
1232 int rv = -ENOMEM;
1233 int res;
1234
1235 /* normal quirks */
1236 quirks = (unsigned long)id->driver_info;
1237
1238 if (quirks == IGNORE_DEVICE)
1239 return -ENODEV;
1240
1241 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1242
1243 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1244
1245 /* handle quirks deadly to normal probing*/
1246 if (quirks == NO_UNION_NORMAL) {
1247 data_interface = usb_ifnum_to_if(usb_dev, 1);
1248 control_interface = usb_ifnum_to_if(usb_dev, 0);
1249 /* we would crash */
1250 if (!data_interface || !control_interface)
1251 return -ENODEV;
1252 goto skip_normal_probe;
1253 }
1254
1255 /* normal probing*/
1256 if (!buffer) {
1257 dev_err(&intf->dev, "Weird descriptor references\n");
1258 return -EINVAL;
1259 }
1260
1261 if (!intf->cur_altsetting)
1262 return -EINVAL;
1263
1264 if (!buflen) {
1265 if (intf->cur_altsetting->endpoint &&
1266 intf->cur_altsetting->endpoint->extralen &&
1267 intf->cur_altsetting->endpoint->extra) {
1268 dev_dbg(&intf->dev,
1269 "Seeking extra descriptors on endpoint\n");
1270 buflen = intf->cur_altsetting->endpoint->extralen;
1271 buffer = intf->cur_altsetting->endpoint->extra;
1272 } else {
1273 dev_err(&intf->dev,
1274 "Zero length descriptor references\n");
1275 return -EINVAL;
1276 }
1277 }
1278
1279 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1280 union_header = h.usb_cdc_union_desc;
1281 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1282 if (cmgmd)
1283 call_intf_num = cmgmd->bDataInterface;
1284
1285 if (!union_header) {
1286 if (call_intf_num > 0) {
1287 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1288 /* quirks for Droids MuIn LCD */
1289 if (quirks & NO_DATA_INTERFACE) {
1290 data_interface = usb_ifnum_to_if(usb_dev, 0);
1291 } else {
1292 data_intf_num = call_intf_num;
1293 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1294 }
1295 control_interface = intf;
1296 } else {
1297 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1298 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1299 return -ENODEV;
1300 } else {
1301 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1302 combined_interfaces = 1;
1303 control_interface = data_interface = intf;
1304 goto look_for_collapsed_interface;
1305 }
1306 }
1307 } else {
1308 data_intf_num = union_header->bSlaveInterface0;
1309 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1310 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1311 }
1312
1313 if (!control_interface || !data_interface) {
1314 dev_dbg(&intf->dev, "no interfaces\n");
1315 return -ENODEV;
1316 }
1317 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1318 return -ENODEV;
1319
1320 if (data_intf_num != call_intf_num)
1321 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1322
1323 if (control_interface == data_interface) {
1324 /* some broken devices designed for windows work this way */
1325 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1326 combined_interfaces = 1;
1327 /* a popular other OS doesn't use it */
1328 quirks |= NO_CAP_LINE;
1329 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1330 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1331 return -EINVAL;
1332 }
1333 look_for_collapsed_interface:
1334 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1335 &epread, &epwrite, &epctrl, NULL);
1336 if (res)
1337 return res;
1338
1339 goto made_compressed_probe;
1340 }
1341
1342 skip_normal_probe:
1343
1344 /*workaround for switched interfaces */
1345 if (data_interface->cur_altsetting->desc.bInterfaceClass
1346 != CDC_DATA_INTERFACE_TYPE) {
1347 if (control_interface->cur_altsetting->desc.bInterfaceClass
1348 == CDC_DATA_INTERFACE_TYPE) {
1349 dev_dbg(&intf->dev,
1350 "Your device has switched interfaces.\n");
1351 swap(control_interface, data_interface);
1352 } else {
1353 return -EINVAL;
1354 }
1355 }
1356
1357 /* Accept probe requests only for the control interface */
1358 if (!combined_interfaces && intf != control_interface)
1359 return -ENODEV;
1360
1361 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1362 /* valid in this context */
1363 dev_dbg(&intf->dev, "The data interface isn't available\n");
1364 return -EBUSY;
1365 }
1366
1367
1368 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1369 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1370 return -EINVAL;
1371
1372 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1373 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1374 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1375
1376
1377 /* workaround for switched endpoints */
1378 if (!usb_endpoint_dir_in(epread)) {
1379 /* descriptors are swapped */
1380 dev_dbg(&intf->dev,
1381 "The data interface has switched endpoints\n");
1382 swap(epread, epwrite);
1383 }
1384 made_compressed_probe:
1385 dev_dbg(&intf->dev, "interfaces are valid\n");
1386
1387 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1388 if (acm == NULL)
1389 goto alloc_fail;
1390
1391 minor = acm_alloc_minor(acm);
1392 if (minor < 0)
1393 goto alloc_fail1;
1394
1395 ctrlsize = usb_endpoint_maxp(epctrl);
1396 readsize = usb_endpoint_maxp(epread) *
1397 (quirks == SINGLE_RX_URB ? 1 : 2);
1398 acm->combined_interfaces = combined_interfaces;
1399 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1400 acm->control = control_interface;
1401 acm->data = data_interface;
1402 acm->minor = minor;
1403 acm->dev = usb_dev;
1404 if (h.usb_cdc_acm_descriptor)
1405 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1406 if (quirks & NO_CAP_LINE)
1407 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1408 acm->ctrlsize = ctrlsize;
1409 acm->readsize = readsize;
1410 acm->rx_buflimit = num_rx_buf;
1411 INIT_WORK(&acm->work, acm_softint);
1412 init_waitqueue_head(&acm->wioctl);
1413 spin_lock_init(&acm->write_lock);
1414 spin_lock_init(&acm->read_lock);
1415 mutex_init(&acm->mutex);
1416 if (usb_endpoint_xfer_int(epread)) {
1417 acm->bInterval = epread->bInterval;
1418 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1419 } else {
1420 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1421 }
1422 if (usb_endpoint_xfer_int(epwrite))
1423 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1424 else
1425 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1426 tty_port_init(&acm->port);
1427 acm->port.ops = &acm_port_ops;
1428 init_usb_anchor(&acm->delayed);
1429 acm->quirks = quirks;
1430
1431 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1432 if (!buf)
1433 goto alloc_fail2;
1434 acm->ctrl_buffer = buf;
1435
1436 if (acm_write_buffers_alloc(acm) < 0)
1437 goto alloc_fail4;
1438
1439 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1440 if (!acm->ctrlurb)
1441 goto alloc_fail5;
1442
1443 for (i = 0; i < num_rx_buf; i++) {
1444 struct acm_rb *rb = &(acm->read_buffers[i]);
1445 struct urb *urb;
1446
1447 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1448 &rb->dma);
1449 if (!rb->base)
1450 goto alloc_fail6;
1451 rb->index = i;
1452 rb->instance = acm;
1453
1454 urb = usb_alloc_urb(0, GFP_KERNEL);
1455 if (!urb)
1456 goto alloc_fail6;
1457
1458 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1459 urb->transfer_dma = rb->dma;
1460 if (usb_endpoint_xfer_int(epread))
1461 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1462 acm->readsize,
1463 acm_read_bulk_callback, rb,
1464 acm->bInterval);
1465 else
1466 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1467 acm->readsize,
1468 acm_read_bulk_callback, rb);
1469
1470 acm->read_urbs[i] = urb;
1471 __set_bit(i, &acm->read_urbs_free);
1472 }
1473 for (i = 0; i < ACM_NW; i++) {
1474 struct acm_wb *snd = &(acm->wb[i]);
1475
1476 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1477 if (snd->urb == NULL)
1478 goto alloc_fail7;
1479
1480 if (usb_endpoint_xfer_int(epwrite))
1481 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1482 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1483 else
1484 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1485 NULL, acm->writesize, acm_write_bulk, snd);
1486 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1487 if (quirks & SEND_ZERO_PACKET)
1488 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1489 snd->instance = acm;
1490 }
1491
1492 usb_set_intfdata(intf, acm);
1493
1494 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1495 if (i < 0)
1496 goto alloc_fail7;
1497
1498 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1499 struct usb_cdc_country_functional_desc * cfd =
1500 h.usb_cdc_country_functional_desc;
1501
1502 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1503 if (!acm->country_codes)
1504 goto skip_countries;
1505 acm->country_code_size = cfd->bLength - 4;
1506 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1507 cfd->bLength - 4);
1508 acm->country_rel_date = cfd->iCountryCodeRelDate;
1509
1510 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1511 if (i < 0) {
1512 kfree(acm->country_codes);
1513 acm->country_codes = NULL;
1514 acm->country_code_size = 0;
1515 goto skip_countries;
1516 }
1517
1518 i = device_create_file(&intf->dev,
1519 &dev_attr_iCountryCodeRelDate);
1520 if (i < 0) {
1521 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1522 kfree(acm->country_codes);
1523 acm->country_codes = NULL;
1524 acm->country_code_size = 0;
1525 goto skip_countries;
1526 }
1527 }
1528
1529 skip_countries:
1530 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1531 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1532 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1533 /* works around buggy devices */
1534 epctrl->bInterval ? epctrl->bInterval : 16);
1535 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1536 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1537 acm->notification_buffer = NULL;
1538 acm->nb_index = 0;
1539 acm->nb_size = 0;
1540
1541 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1542
1543 acm->line.dwDTERate = cpu_to_le32(9600);
1544 acm->line.bDataBits = 8;
1545 acm_set_line(acm, &acm->line);
1546
1547 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1548 usb_set_intfdata(data_interface, acm);
1549
1550 usb_get_intf(control_interface);
1551 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1552 &control_interface->dev);
1553 if (IS_ERR(tty_dev)) {
1554 rv = PTR_ERR(tty_dev);
1555 goto alloc_fail8;
1556 }
1557
1558 if (quirks & CLEAR_HALT_CONDITIONS) {
1559 usb_clear_halt(usb_dev, acm->in);
1560 usb_clear_halt(usb_dev, acm->out);
1561 }
1562
1563 return 0;
1564 alloc_fail8:
1565 if (acm->country_codes) {
1566 device_remove_file(&acm->control->dev,
1567 &dev_attr_wCountryCodes);
1568 device_remove_file(&acm->control->dev,
1569 &dev_attr_iCountryCodeRelDate);
1570 kfree(acm->country_codes);
1571 }
1572 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1573 alloc_fail7:
1574 usb_set_intfdata(intf, NULL);
1575 for (i = 0; i < ACM_NW; i++)
1576 usb_free_urb(acm->wb[i].urb);
1577 alloc_fail6:
1578 for (i = 0; i < num_rx_buf; i++)
1579 usb_free_urb(acm->read_urbs[i]);
1580 acm_read_buffers_free(acm);
1581 usb_free_urb(acm->ctrlurb);
1582 alloc_fail5:
1583 acm_write_buffers_free(acm);
1584 alloc_fail4:
1585 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1586 alloc_fail2:
1587 acm_release_minor(acm);
1588 alloc_fail1:
1589 kfree(acm);
1590 alloc_fail:
1591 return rv;
1592 }
1593
1594 static void acm_disconnect(struct usb_interface *intf)
1595 {
1596 struct acm *acm = usb_get_intfdata(intf);
1597 struct tty_struct *tty;
1598
1599 /* sibling interface is already cleaning up */
1600 if (!acm)
1601 return;
1602
1603 mutex_lock(&acm->mutex);
1604 acm->disconnected = true;
1605 if (acm->country_codes) {
1606 device_remove_file(&acm->control->dev,
1607 &dev_attr_wCountryCodes);
1608 device_remove_file(&acm->control->dev,
1609 &dev_attr_iCountryCodeRelDate);
1610 }
1611 wake_up_all(&acm->wioctl);
1612 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1613 usb_set_intfdata(acm->control, NULL);
1614 usb_set_intfdata(acm->data, NULL);
1615 mutex_unlock(&acm->mutex);
1616
1617 tty = tty_port_tty_get(&acm->port);
1618 if (tty) {
1619 tty_vhangup(tty);
1620 tty_kref_put(tty);
1621 }
1622
1623 acm_kill_urbs(acm);
1624 cancel_work_sync(&acm->work);
1625
1626 tty_unregister_device(acm_tty_driver, acm->minor);
1627
1628 acm_write_buffers_free(acm);
1629 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1630 acm_read_buffers_free(acm);
1631
1632 kfree(acm->notification_buffer);
1633
1634 if (!acm->combined_interfaces)
1635 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1636 acm->data : acm->control);
1637
1638 tty_port_put(&acm->port);
1639 }
1640
1641 #ifdef CONFIG_PM
1642 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1643 {
1644 struct acm *acm = usb_get_intfdata(intf);
1645 int cnt;
1646
1647 spin_lock_irq(&acm->write_lock);
1648 if (PMSG_IS_AUTO(message)) {
1649 if (acm->transmitting) {
1650 spin_unlock_irq(&acm->write_lock);
1651 return -EBUSY;
1652 }
1653 }
1654 cnt = acm->susp_count++;
1655 spin_unlock_irq(&acm->write_lock);
1656
1657 if (cnt)
1658 return 0;
1659
1660 acm_kill_urbs(acm);
1661 cancel_work_sync(&acm->work);
1662
1663 return 0;
1664 }
1665
1666 static int acm_resume(struct usb_interface *intf)
1667 {
1668 struct acm *acm = usb_get_intfdata(intf);
1669 struct urb *urb;
1670 int rv = 0;
1671
1672 spin_lock_irq(&acm->write_lock);
1673
1674 if (--acm->susp_count)
1675 goto out;
1676
1677 if (tty_port_initialized(&acm->port)) {
1678 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1679
1680 for (;;) {
1681 urb = usb_get_from_anchor(&acm->delayed);
1682 if (!urb)
1683 break;
1684
1685 acm_start_wb(acm, urb->context);
1686 }
1687
1688 /*
1689 * delayed error checking because we must
1690 * do the write path at all cost
1691 */
1692 if (rv < 0)
1693 goto out;
1694
1695 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1696 }
1697 out:
1698 spin_unlock_irq(&acm->write_lock);
1699
1700 return rv;
1701 }
1702
1703 static int acm_reset_resume(struct usb_interface *intf)
1704 {
1705 struct acm *acm = usb_get_intfdata(intf);
1706
1707 if (tty_port_initialized(&acm->port))
1708 tty_port_tty_hangup(&acm->port, false);
1709
1710 return acm_resume(intf);
1711 }
1712
1713 #endif /* CONFIG_PM */
1714
1715 static int acm_pre_reset(struct usb_interface *intf)
1716 {
1717 struct acm *acm = usb_get_intfdata(intf);
1718
1719 clear_bit(EVENT_RX_STALL, &acm->flags);
1720
1721 return 0;
1722 }
1723
1724 #define NOKIA_PCSUITE_ACM_INFO(x) \
1725 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1726 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1727 USB_CDC_ACM_PROTO_VENDOR)
1728
1729 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1730 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1731 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1732 USB_CDC_ACM_PROTO_VENDOR)
1733
1734 /*
1735 * USB driver structure.
1736 */
1737
1738 static const struct usb_device_id acm_ids[] = {
1739 /* quirky and broken devices */
1740 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1741 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1742 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1743 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1744 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1746 },
1747 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1749 },
1750 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1752 },
1753 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1755 },
1756 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1757 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1758 },
1759 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1760 .driver_info = SINGLE_RX_URB,
1761 },
1762 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1763 .driver_info = SINGLE_RX_URB, /* firmware bug */
1764 },
1765 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1766 .driver_info = SINGLE_RX_URB, /* firmware bug */
1767 },
1768 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1769 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1770 },
1771 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1772 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1773 },
1774 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1775 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1776 },
1777 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1778 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1779 },
1780 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1781 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1782 },
1783 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1784 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1785 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1786 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1787 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1788 },
1789 /* Motorola H24 HSPA module: */
1790 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1791 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1792 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1793 },
1794 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1795 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1796 },
1797 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1798 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1799 },
1800 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1801 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1802 },
1803 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1804 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1805 },
1806 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1807 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1808 },
1809 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1810 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1811 },
1812
1813 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1814 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1815 data interface instead of
1816 communications interface.
1817 Maybe we should define a new
1818 quirk for this. */
1819 },
1820 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1821 .driver_info = NO_UNION_NORMAL,
1822 },
1823 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1824 .driver_info = NO_UNION_NORMAL,
1825 },
1826 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1827 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1828 },
1829 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1830 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1831 },
1832 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1833 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1834 },
1835
1836 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1837 .driver_info = CLEAR_HALT_CONDITIONS,
1838 },
1839
1840 /* Nokia S60 phones expose two ACM channels. The first is
1841 * a modem and is picked up by the standard AT-command
1842 * information below. The second is 'vendor-specific' but
1843 * is treated as a serial device at the S60 end, so we want
1844 * to expose it on Linux too. */
1845 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1847 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1849 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1851 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1853 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1855 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1856 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1857 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1858 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1859 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1860 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1861 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1862 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1863 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1864 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1865 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1866 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1867 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1868 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1869 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1870 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1871 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1872 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1873 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1874 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1875 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1876 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1877 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1878 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1879 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1880 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1881 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1882 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1883 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1884 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1885 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1886 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1887 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1888 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1889 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1890 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1891 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1892 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1893 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1894 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1895 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1896 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1897 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1898 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1899 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1900 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1901 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1902 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1903
1904 /* Support for Owen devices */
1905 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1906
1907 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1908
1909 /* Support for Droids MuIn LCD */
1910 { USB_DEVICE(0x04d8, 0x000b),
1911 .driver_info = NO_DATA_INTERFACE,
1912 },
1913
1914 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1915 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1916 .driver_info = IGNORE_DEVICE,
1917 },
1918 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1919 .driver_info = IGNORE_DEVICE,
1920 },
1921 #endif
1922
1923 /*Samsung phone in firmware update mode */
1924 { USB_DEVICE(0x04e8, 0x685d),
1925 .driver_info = IGNORE_DEVICE,
1926 },
1927
1928 /* Exclude Infineon Flash Loader utility */
1929 { USB_DEVICE(0x058b, 0x0041),
1930 .driver_info = IGNORE_DEVICE,
1931 },
1932
1933 /* control interfaces without any protocol set */
1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1935 USB_CDC_PROTO_NONE) },
1936
1937 /* control interfaces with various AT-command sets */
1938 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1939 USB_CDC_ACM_PROTO_AT_V25TER) },
1940 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1941 USB_CDC_ACM_PROTO_AT_PCCA101) },
1942 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1943 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1945 USB_CDC_ACM_PROTO_AT_GSM) },
1946 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1947 USB_CDC_ACM_PROTO_AT_3G) },
1948 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1949 USB_CDC_ACM_PROTO_AT_CDMA) },
1950
1951 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1952 .driver_info = SEND_ZERO_PACKET,
1953 },
1954
1955 { }
1956 };
1957
1958 MODULE_DEVICE_TABLE(usb, acm_ids);
1959
1960 static struct usb_driver acm_driver = {
1961 .name = "cdc_acm",
1962 .probe = acm_probe,
1963 .disconnect = acm_disconnect,
1964 #ifdef CONFIG_PM
1965 .suspend = acm_suspend,
1966 .resume = acm_resume,
1967 .reset_resume = acm_reset_resume,
1968 #endif
1969 .pre_reset = acm_pre_reset,
1970 .id_table = acm_ids,
1971 #ifdef CONFIG_PM
1972 .supports_autosuspend = 1,
1973 #endif
1974 .disable_hub_initiated_lpm = 1,
1975 };
1976
1977 /*
1978 * TTY driver structures.
1979 */
1980
1981 static const struct tty_operations acm_ops = {
1982 .install = acm_tty_install,
1983 .open = acm_tty_open,
1984 .close = acm_tty_close,
1985 .cleanup = acm_tty_cleanup,
1986 .hangup = acm_tty_hangup,
1987 .write = acm_tty_write,
1988 .put_char = acm_tty_put_char,
1989 .flush_chars = acm_tty_flush_chars,
1990 .write_room = acm_tty_write_room,
1991 .ioctl = acm_tty_ioctl,
1992 .throttle = acm_tty_throttle,
1993 .unthrottle = acm_tty_unthrottle,
1994 .chars_in_buffer = acm_tty_chars_in_buffer,
1995 .break_ctl = acm_tty_break_ctl,
1996 .set_termios = acm_tty_set_termios,
1997 .tiocmget = acm_tty_tiocmget,
1998 .tiocmset = acm_tty_tiocmset,
1999 .get_icount = acm_tty_get_icount,
2000 };
2001
2002 /*
2003 * Init / exit.
2004 */
2005
2006 static int __init acm_init(void)
2007 {
2008 int retval;
2009 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2010 if (!acm_tty_driver)
2011 return -ENOMEM;
2012 acm_tty_driver->driver_name = "acm",
2013 acm_tty_driver->name = "ttyACM",
2014 acm_tty_driver->major = ACM_TTY_MAJOR,
2015 acm_tty_driver->minor_start = 0,
2016 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2017 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2018 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2019 acm_tty_driver->init_termios = tty_std_termios;
2020 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2021 HUPCL | CLOCAL;
2022 tty_set_operations(acm_tty_driver, &acm_ops);
2023
2024 retval = tty_register_driver(acm_tty_driver);
2025 if (retval) {
2026 put_tty_driver(acm_tty_driver);
2027 return retval;
2028 }
2029
2030 retval = usb_register(&acm_driver);
2031 if (retval) {
2032 tty_unregister_driver(acm_tty_driver);
2033 put_tty_driver(acm_tty_driver);
2034 return retval;
2035 }
2036
2037 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2038
2039 return 0;
2040 }
2041
2042 static void __exit acm_exit(void)
2043 {
2044 usb_deregister(&acm_driver);
2045 tty_unregister_driver(acm_tty_driver);
2046 put_tty_driver(acm_tty_driver);
2047 idr_destroy(&acm_minors);
2048 }
2049
2050 module_init(acm_init);
2051 module_exit(acm_exit);
2052
2053 MODULE_AUTHOR(DRIVER_AUTHOR);
2054 MODULE_DESCRIPTION(DRIVER_DESC);
2055 MODULE_LICENSE("GPL");
2056 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
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