]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/usb/class/cdc-acm.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
efi/arm: Fix boot crash with CONFIG_CPUMASK_OFFSTACK=y
[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/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 static void acm_kill_urbs(struct acm *acm)
162 {
163 int i;
164
165 usb_kill_urb(acm->ctrlurb);
166 for (i = 0; i < ACM_NW; i++)
167 usb_kill_urb(acm->wb[i].urb);
168 for (i = 0; i < acm->rx_buflimit; i++)
169 usb_kill_urb(acm->read_urbs[i]);
170 }
171
172 /*
173 * Write buffer management.
174 * All of these assume proper locks taken by the caller.
175 */
176
177 static int acm_wb_alloc(struct acm *acm)
178 {
179 int i, wbn;
180 struct acm_wb *wb;
181
182 wbn = 0;
183 i = 0;
184 for (;;) {
185 wb = &acm->wb[wbn];
186 if (!wb->use) {
187 wb->use = 1;
188 return wbn;
189 }
190 wbn = (wbn + 1) % ACM_NW;
191 if (++i >= ACM_NW)
192 return -1;
193 }
194 }
195
196 static int acm_wb_is_avail(struct acm *acm)
197 {
198 int i, n;
199 unsigned long flags;
200
201 n = ACM_NW;
202 spin_lock_irqsave(&acm->write_lock, flags);
203 for (i = 0; i < ACM_NW; i++)
204 n -= acm->wb[i].use;
205 spin_unlock_irqrestore(&acm->write_lock, flags);
206 return n;
207 }
208
209 /*
210 * Finish write. Caller must hold acm->write_lock
211 */
212 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
213 {
214 wb->use = 0;
215 acm->transmitting--;
216 usb_autopm_put_interface_async(acm->control);
217 }
218
219 /*
220 * Poke write.
221 *
222 * the caller is responsible for locking
223 */
224
225 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
226 {
227 int rc;
228
229 acm->transmitting++;
230
231 wb->urb->transfer_buffer = wb->buf;
232 wb->urb->transfer_dma = wb->dmah;
233 wb->urb->transfer_buffer_length = wb->len;
234 wb->urb->dev = acm->dev;
235
236 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
237 if (rc < 0) {
238 dev_err(&acm->data->dev,
239 "%s - usb_submit_urb(write bulk) failed: %d\n",
240 __func__, rc);
241 acm_write_done(acm, wb);
242 }
243 return rc;
244 }
245
246 /*
247 * attributes exported through sysfs
248 */
249 static ssize_t show_caps
250 (struct device *dev, struct device_attribute *attr, char *buf)
251 {
252 struct usb_interface *intf = to_usb_interface(dev);
253 struct acm *acm = usb_get_intfdata(intf);
254
255 return sprintf(buf, "%d", acm->ctrl_caps);
256 }
257 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
258
259 static ssize_t show_country_codes
260 (struct device *dev, struct device_attribute *attr, char *buf)
261 {
262 struct usb_interface *intf = to_usb_interface(dev);
263 struct acm *acm = usb_get_intfdata(intf);
264
265 memcpy(buf, acm->country_codes, acm->country_code_size);
266 return acm->country_code_size;
267 }
268
269 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
270
271 static ssize_t show_country_rel_date
272 (struct device *dev, struct device_attribute *attr, char *buf)
273 {
274 struct usb_interface *intf = to_usb_interface(dev);
275 struct acm *acm = usb_get_intfdata(intf);
276
277 return sprintf(buf, "%d", acm->country_rel_date);
278 }
279
280 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
281 /*
282 * Interrupt handlers for various ACM device responses
283 */
284
285 /* control interface reports status changes with "interrupt" transfers */
286 static void acm_ctrl_irq(struct urb *urb)
287 {
288 struct acm *acm = urb->context;
289 struct usb_cdc_notification *dr = urb->transfer_buffer;
290 unsigned char *data;
291 int newctrl;
292 int difference;
293 int retval;
294 int status = urb->status;
295
296 switch (status) {
297 case 0:
298 /* success */
299 break;
300 case -ECONNRESET:
301 case -ENOENT:
302 case -ESHUTDOWN:
303 /* this urb is terminated, clean up */
304 dev_dbg(&acm->control->dev,
305 "%s - urb shutting down with status: %d\n",
306 __func__, status);
307 return;
308 default:
309 dev_dbg(&acm->control->dev,
310 "%s - nonzero urb status received: %d\n",
311 __func__, status);
312 goto exit;
313 }
314
315 usb_mark_last_busy(acm->dev);
316
317 data = (unsigned char *)(dr + 1);
318 switch (dr->bNotificationType) {
319 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
320 dev_dbg(&acm->control->dev,
321 "%s - network connection: %d\n", __func__, dr->wValue);
322 break;
323
324 case USB_CDC_NOTIFY_SERIAL_STATE:
325 newctrl = get_unaligned_le16(data);
326
327 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
328 dev_dbg(&acm->control->dev,
329 "%s - calling hangup\n", __func__);
330 tty_port_tty_hangup(&acm->port, false);
331 }
332
333 difference = acm->ctrlin ^ newctrl;
334 spin_lock(&acm->read_lock);
335 acm->ctrlin = newctrl;
336 acm->oldcount = acm->iocount;
337
338 if (difference & ACM_CTRL_DSR)
339 acm->iocount.dsr++;
340 if (difference & ACM_CTRL_BRK)
341 acm->iocount.brk++;
342 if (difference & ACM_CTRL_RI)
343 acm->iocount.rng++;
344 if (difference & ACM_CTRL_DCD)
345 acm->iocount.dcd++;
346 if (difference & ACM_CTRL_FRAMING)
347 acm->iocount.frame++;
348 if (difference & ACM_CTRL_PARITY)
349 acm->iocount.parity++;
350 if (difference & ACM_CTRL_OVERRUN)
351 acm->iocount.overrun++;
352 spin_unlock(&acm->read_lock);
353
354 if (difference)
355 wake_up_all(&acm->wioctl);
356
357 break;
358
359 default:
360 dev_dbg(&acm->control->dev,
361 "%s - unknown notification %d received: index %d "
362 "len %d data0 %d data1 %d\n",
363 __func__,
364 dr->bNotificationType, dr->wIndex,
365 dr->wLength, data[0], data[1]);
366 break;
367 }
368 exit:
369 retval = usb_submit_urb(urb, GFP_ATOMIC);
370 if (retval && retval != -EPERM)
371 dev_err(&acm->control->dev,
372 "%s - usb_submit_urb failed: %d\n", __func__, retval);
373 }
374
375 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
376 {
377 int res;
378
379 if (!test_and_clear_bit(index, &acm->read_urbs_free))
380 return 0;
381
382 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
383 if (res) {
384 if (res != -EPERM) {
385 dev_err(&acm->data->dev,
386 "urb %d failed submission with %d\n",
387 index, res);
388 }
389 set_bit(index, &acm->read_urbs_free);
390 return res;
391 } else {
392 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
393 }
394
395 return 0;
396 }
397
398 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
399 {
400 int res;
401 int i;
402
403 for (i = 0; i < acm->rx_buflimit; ++i) {
404 res = acm_submit_read_urb(acm, i, mem_flags);
405 if (res)
406 return res;
407 }
408
409 return 0;
410 }
411
412 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
413 {
414 if (!urb->actual_length)
415 return;
416
417 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
418 urb->actual_length);
419 tty_flip_buffer_push(&acm->port);
420 }
421
422 static void acm_read_bulk_callback(struct urb *urb)
423 {
424 struct acm_rb *rb = urb->context;
425 struct acm *acm = rb->instance;
426 unsigned long flags;
427 int status = urb->status;
428
429 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
430 rb->index, urb->actual_length, status);
431
432 set_bit(rb->index, &acm->read_urbs_free);
433
434 if (!acm->dev) {
435 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
436 return;
437 }
438
439 switch (status) {
440 case 0:
441 usb_mark_last_busy(acm->dev);
442 acm_process_read_urb(acm, urb);
443 break;
444 case -EPIPE:
445 set_bit(EVENT_RX_STALL, &acm->flags);
446 schedule_work(&acm->work);
447 return;
448 case -ENOENT:
449 case -ECONNRESET:
450 case -ESHUTDOWN:
451 dev_dbg(&acm->data->dev,
452 "%s - urb shutting down with status: %d\n",
453 __func__, status);
454 return;
455 default:
456 dev_dbg(&acm->data->dev,
457 "%s - nonzero urb status received: %d\n",
458 __func__, status);
459 break;
460 }
461
462 /*
463 * Unthrottle may run on another CPU which needs to see events
464 * in the same order. Submission has an implict barrier
465 */
466 smp_mb__before_atomic();
467
468 /* throttle device if requested by tty */
469 spin_lock_irqsave(&acm->read_lock, flags);
470 acm->throttled = acm->throttle_req;
471 if (!acm->throttled) {
472 spin_unlock_irqrestore(&acm->read_lock, flags);
473 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
474 } else {
475 spin_unlock_irqrestore(&acm->read_lock, flags);
476 }
477 }
478
479 /* data interface wrote those outgoing bytes */
480 static void acm_write_bulk(struct urb *urb)
481 {
482 struct acm_wb *wb = urb->context;
483 struct acm *acm = wb->instance;
484 unsigned long flags;
485 int status = urb->status;
486
487 if (status || (urb->actual_length != urb->transfer_buffer_length))
488 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
489 urb->actual_length,
490 urb->transfer_buffer_length,
491 status);
492
493 spin_lock_irqsave(&acm->write_lock, flags);
494 acm_write_done(acm, wb);
495 spin_unlock_irqrestore(&acm->write_lock, flags);
496 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
497 schedule_work(&acm->work);
498 }
499
500 static void acm_softint(struct work_struct *work)
501 {
502 int i;
503 struct acm *acm = container_of(work, struct acm, work);
504
505 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
506 if (!(usb_autopm_get_interface(acm->data))) {
507 for (i = 0; i < acm->rx_buflimit; i++)
508 usb_kill_urb(acm->read_urbs[i]);
509 usb_clear_halt(acm->dev, acm->in);
510 acm_submit_read_urbs(acm, GFP_KERNEL);
511 usb_autopm_put_interface(acm->data);
512 }
513 clear_bit(EVENT_RX_STALL, &acm->flags);
514 }
515
516 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) {
517 tty_port_tty_wakeup(&acm->port);
518 clear_bit(EVENT_TTY_WAKEUP, &acm->flags);
519 }
520 }
521
522 /*
523 * TTY handlers
524 */
525
526 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
527 {
528 struct acm *acm;
529 int retval;
530
531 acm = acm_get_by_minor(tty->index);
532 if (!acm)
533 return -ENODEV;
534
535 retval = tty_standard_install(driver, tty);
536 if (retval)
537 goto error_init_termios;
538
539 tty->driver_data = acm;
540
541 return 0;
542
543 error_init_termios:
544 tty_port_put(&acm->port);
545 return retval;
546 }
547
548 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
549 {
550 struct acm *acm = tty->driver_data;
551
552 return tty_port_open(&acm->port, tty, filp);
553 }
554
555 static void acm_port_dtr_rts(struct tty_port *port, int raise)
556 {
557 struct acm *acm = container_of(port, struct acm, port);
558 int val;
559 int res;
560
561 if (raise)
562 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
563 else
564 val = 0;
565
566 /* FIXME: add missing ctrlout locking throughout driver */
567 acm->ctrlout = val;
568
569 res = acm_set_control(acm, val);
570 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
571 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
572 }
573
574 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
575 {
576 struct acm *acm = container_of(port, struct acm, port);
577 int retval = -ENODEV;
578 int i;
579
580 mutex_lock(&acm->mutex);
581 if (acm->disconnected)
582 goto disconnected;
583
584 retval = usb_autopm_get_interface(acm->control);
585 if (retval)
586 goto error_get_interface;
587
588 /*
589 * FIXME: Why do we need this? Allocating 64K of physically contiguous
590 * memory is really nasty...
591 */
592 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
593 acm->control->needs_remote_wakeup = 1;
594
595 acm->ctrlurb->dev = acm->dev;
596 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
597 if (retval) {
598 dev_err(&acm->control->dev,
599 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
600 goto error_submit_urb;
601 }
602
603 acm_tty_set_termios(tty, NULL);
604
605 /*
606 * Unthrottle device in case the TTY was closed while throttled.
607 */
608 spin_lock_irq(&acm->read_lock);
609 acm->throttled = 0;
610 acm->throttle_req = 0;
611 spin_unlock_irq(&acm->read_lock);
612
613 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
614 if (retval)
615 goto error_submit_read_urbs;
616
617 usb_autopm_put_interface(acm->control);
618
619 mutex_unlock(&acm->mutex);
620
621 return 0;
622
623 error_submit_read_urbs:
624 for (i = 0; i < acm->rx_buflimit; i++)
625 usb_kill_urb(acm->read_urbs[i]);
626 usb_kill_urb(acm->ctrlurb);
627 error_submit_urb:
628 usb_autopm_put_interface(acm->control);
629 error_get_interface:
630 disconnected:
631 mutex_unlock(&acm->mutex);
632
633 return usb_translate_errors(retval);
634 }
635
636 static void acm_port_destruct(struct tty_port *port)
637 {
638 struct acm *acm = container_of(port, struct acm, port);
639
640 acm_release_minor(acm);
641 usb_put_intf(acm->control);
642 kfree(acm->country_codes);
643 kfree(acm);
644 }
645
646 static void acm_port_shutdown(struct tty_port *port)
647 {
648 struct acm *acm = container_of(port, struct acm, port);
649 struct urb *urb;
650 struct acm_wb *wb;
651
652 /*
653 * Need to grab write_lock to prevent race with resume, but no need to
654 * hold it due to the tty-port initialised flag.
655 */
656 spin_lock_irq(&acm->write_lock);
657 spin_unlock_irq(&acm->write_lock);
658
659 usb_autopm_get_interface_no_resume(acm->control);
660 acm->control->needs_remote_wakeup = 0;
661 usb_autopm_put_interface(acm->control);
662
663 for (;;) {
664 urb = usb_get_from_anchor(&acm->delayed);
665 if (!urb)
666 break;
667 wb = urb->context;
668 wb->use = 0;
669 usb_autopm_put_interface_async(acm->control);
670 }
671
672 acm_kill_urbs(acm);
673 }
674
675 static void acm_tty_cleanup(struct tty_struct *tty)
676 {
677 struct acm *acm = tty->driver_data;
678
679 tty_port_put(&acm->port);
680 }
681
682 static void acm_tty_hangup(struct tty_struct *tty)
683 {
684 struct acm *acm = tty->driver_data;
685
686 tty_port_hangup(&acm->port);
687 }
688
689 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
690 {
691 struct acm *acm = tty->driver_data;
692
693 tty_port_close(&acm->port, tty, filp);
694 }
695
696 static int acm_tty_write(struct tty_struct *tty,
697 const unsigned char *buf, int count)
698 {
699 struct acm *acm = tty->driver_data;
700 int stat;
701 unsigned long flags;
702 int wbn;
703 struct acm_wb *wb;
704
705 if (!count)
706 return 0;
707
708 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
709
710 spin_lock_irqsave(&acm->write_lock, flags);
711 wbn = acm_wb_alloc(acm);
712 if (wbn < 0) {
713 spin_unlock_irqrestore(&acm->write_lock, flags);
714 return 0;
715 }
716 wb = &acm->wb[wbn];
717
718 if (!acm->dev) {
719 wb->use = 0;
720 spin_unlock_irqrestore(&acm->write_lock, flags);
721 return -ENODEV;
722 }
723
724 count = (count > acm->writesize) ? acm->writesize : count;
725 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
726 memcpy(wb->buf, buf, count);
727 wb->len = count;
728
729 stat = usb_autopm_get_interface_async(acm->control);
730 if (stat) {
731 wb->use = 0;
732 spin_unlock_irqrestore(&acm->write_lock, flags);
733 return stat;
734 }
735
736 if (acm->susp_count) {
737 if (acm->putbuffer) {
738 /* now to preserve order */
739 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
740 acm->putbuffer = NULL;
741 }
742 usb_anchor_urb(wb->urb, &acm->delayed);
743 spin_unlock_irqrestore(&acm->write_lock, flags);
744 return count;
745 } else {
746 if (acm->putbuffer) {
747 /* at this point there is no good way to handle errors */
748 acm_start_wb(acm, acm->putbuffer);
749 acm->putbuffer = NULL;
750 }
751 }
752
753 stat = acm_start_wb(acm, wb);
754 spin_unlock_irqrestore(&acm->write_lock, flags);
755
756 if (stat < 0)
757 return stat;
758 return count;
759 }
760
761 static void acm_tty_flush_chars(struct tty_struct *tty)
762 {
763 struct acm *acm = tty->driver_data;
764 struct acm_wb *cur = acm->putbuffer;
765 int err;
766 unsigned long flags;
767
768 if (!cur) /* nothing to do */
769 return;
770
771 acm->putbuffer = NULL;
772 err = usb_autopm_get_interface_async(acm->control);
773 spin_lock_irqsave(&acm->write_lock, flags);
774 if (err < 0) {
775 cur->use = 0;
776 acm->putbuffer = cur;
777 goto out;
778 }
779
780 if (acm->susp_count)
781 usb_anchor_urb(cur->urb, &acm->delayed);
782 else
783 acm_start_wb(acm, cur);
784 out:
785 spin_unlock_irqrestore(&acm->write_lock, flags);
786 return;
787 }
788
789 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
790 {
791 struct acm *acm = tty->driver_data;
792 struct acm_wb *cur;
793 int wbn;
794 unsigned long flags;
795
796 overflow:
797 cur = acm->putbuffer;
798 if (!cur) {
799 spin_lock_irqsave(&acm->write_lock, flags);
800 wbn = acm_wb_alloc(acm);
801 if (wbn >= 0) {
802 cur = &acm->wb[wbn];
803 acm->putbuffer = cur;
804 }
805 spin_unlock_irqrestore(&acm->write_lock, flags);
806 if (!cur)
807 return 0;
808 }
809
810 if (cur->len == acm->writesize) {
811 acm_tty_flush_chars(tty);
812 goto overflow;
813 }
814
815 cur->buf[cur->len++] = ch;
816 return 1;
817 }
818
819 static int acm_tty_write_room(struct tty_struct *tty)
820 {
821 struct acm *acm = tty->driver_data;
822 /*
823 * Do not let the line discipline to know that we have a reserve,
824 * or it might get too enthusiastic.
825 */
826 return acm_wb_is_avail(acm) ? acm->writesize : 0;
827 }
828
829 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
830 {
831 struct acm *acm = tty->driver_data;
832 /*
833 * if the device was unplugged then any remaining characters fell out
834 * of the connector ;)
835 */
836 if (acm->disconnected)
837 return 0;
838 /*
839 * This is inaccurate (overcounts), but it works.
840 */
841 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
842 }
843
844 static void acm_tty_throttle(struct tty_struct *tty)
845 {
846 struct acm *acm = tty->driver_data;
847
848 spin_lock_irq(&acm->read_lock);
849 acm->throttle_req = 1;
850 spin_unlock_irq(&acm->read_lock);
851 }
852
853 static void acm_tty_unthrottle(struct tty_struct *tty)
854 {
855 struct acm *acm = tty->driver_data;
856 unsigned int was_throttled;
857
858 spin_lock_irq(&acm->read_lock);
859 was_throttled = acm->throttled;
860 acm->throttled = 0;
861 acm->throttle_req = 0;
862 spin_unlock_irq(&acm->read_lock);
863
864 if (was_throttled)
865 acm_submit_read_urbs(acm, GFP_KERNEL);
866 }
867
868 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
869 {
870 struct acm *acm = tty->driver_data;
871 int retval;
872
873 retval = acm_send_break(acm, state ? 0xffff : 0);
874 if (retval < 0)
875 dev_dbg(&acm->control->dev,
876 "%s - send break failed\n", __func__);
877 return retval;
878 }
879
880 static int acm_tty_tiocmget(struct tty_struct *tty)
881 {
882 struct acm *acm = tty->driver_data;
883
884 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
885 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
886 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
887 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
888 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
889 TIOCM_CTS;
890 }
891
892 static int acm_tty_tiocmset(struct tty_struct *tty,
893 unsigned int set, unsigned int clear)
894 {
895 struct acm *acm = tty->driver_data;
896 unsigned int newctrl;
897
898 newctrl = acm->ctrlout;
899 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
900 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
901 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
902 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
903
904 newctrl = (newctrl & ~clear) | set;
905
906 if (acm->ctrlout == newctrl)
907 return 0;
908 return acm_set_control(acm, acm->ctrlout = newctrl);
909 }
910
911 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
912 {
913 struct serial_struct tmp;
914
915 memset(&tmp, 0, sizeof(tmp));
916 tmp.xmit_fifo_size = acm->writesize;
917 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
918 tmp.close_delay = acm->port.close_delay / 10;
919 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
920 ASYNC_CLOSING_WAIT_NONE :
921 acm->port.closing_wait / 10;
922
923 if (copy_to_user(info, &tmp, sizeof(tmp)))
924 return -EFAULT;
925 else
926 return 0;
927 }
928
929 static int set_serial_info(struct acm *acm,
930 struct serial_struct __user *newinfo)
931 {
932 struct serial_struct new_serial;
933 unsigned int closing_wait, close_delay;
934 int retval = 0;
935
936 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
937 return -EFAULT;
938
939 close_delay = new_serial.close_delay * 10;
940 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
941 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
942
943 mutex_lock(&acm->port.mutex);
944
945 if (!capable(CAP_SYS_ADMIN)) {
946 if ((close_delay != acm->port.close_delay) ||
947 (closing_wait != acm->port.closing_wait))
948 retval = -EPERM;
949 else
950 retval = -EOPNOTSUPP;
951 } else {
952 acm->port.close_delay = close_delay;
953 acm->port.closing_wait = closing_wait;
954 }
955
956 mutex_unlock(&acm->port.mutex);
957 return retval;
958 }
959
960 static int wait_serial_change(struct acm *acm, unsigned long arg)
961 {
962 int rv = 0;
963 DECLARE_WAITQUEUE(wait, current);
964 struct async_icount old, new;
965
966 do {
967 spin_lock_irq(&acm->read_lock);
968 old = acm->oldcount;
969 new = acm->iocount;
970 acm->oldcount = new;
971 spin_unlock_irq(&acm->read_lock);
972
973 if ((arg & TIOCM_DSR) &&
974 old.dsr != new.dsr)
975 break;
976 if ((arg & TIOCM_CD) &&
977 old.dcd != new.dcd)
978 break;
979 if ((arg & TIOCM_RI) &&
980 old.rng != new.rng)
981 break;
982
983 add_wait_queue(&acm->wioctl, &wait);
984 set_current_state(TASK_INTERRUPTIBLE);
985 schedule();
986 remove_wait_queue(&acm->wioctl, &wait);
987 if (acm->disconnected) {
988 if (arg & TIOCM_CD)
989 break;
990 else
991 rv = -ENODEV;
992 } else {
993 if (signal_pending(current))
994 rv = -ERESTARTSYS;
995 }
996 } while (!rv);
997
998
999
1000 return rv;
1001 }
1002
1003 static int acm_tty_get_icount(struct tty_struct *tty,
1004 struct serial_icounter_struct *icount)
1005 {
1006 struct acm *acm = tty->driver_data;
1007
1008 icount->dsr = acm->iocount.dsr;
1009 icount->rng = acm->iocount.rng;
1010 icount->dcd = acm->iocount.dcd;
1011 icount->frame = acm->iocount.frame;
1012 icount->overrun = acm->iocount.overrun;
1013 icount->parity = acm->iocount.parity;
1014 icount->brk = acm->iocount.brk;
1015
1016 return 0;
1017 }
1018
1019 static int acm_tty_ioctl(struct tty_struct *tty,
1020 unsigned int cmd, unsigned long arg)
1021 {
1022 struct acm *acm = tty->driver_data;
1023 int rv = -ENOIOCTLCMD;
1024
1025 switch (cmd) {
1026 case TIOCGSERIAL: /* gets serial port data */
1027 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1028 break;
1029 case TIOCSSERIAL:
1030 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1031 break;
1032 case TIOCMIWAIT:
1033 rv = usb_autopm_get_interface(acm->control);
1034 if (rv < 0) {
1035 rv = -EIO;
1036 break;
1037 }
1038 rv = wait_serial_change(acm, arg);
1039 usb_autopm_put_interface(acm->control);
1040 break;
1041 }
1042
1043 return rv;
1044 }
1045
1046 static void acm_tty_set_termios(struct tty_struct *tty,
1047 struct ktermios *termios_old)
1048 {
1049 struct acm *acm = tty->driver_data;
1050 struct ktermios *termios = &tty->termios;
1051 struct usb_cdc_line_coding newline;
1052 int newctrl = acm->ctrlout;
1053
1054 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1055 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1056 newline.bParityType = termios->c_cflag & PARENB ?
1057 (termios->c_cflag & PARODD ? 1 : 2) +
1058 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1059 switch (termios->c_cflag & CSIZE) {
1060 case CS5:
1061 newline.bDataBits = 5;
1062 break;
1063 case CS6:
1064 newline.bDataBits = 6;
1065 break;
1066 case CS7:
1067 newline.bDataBits = 7;
1068 break;
1069 case CS8:
1070 default:
1071 newline.bDataBits = 8;
1072 break;
1073 }
1074 /* FIXME: Needs to clear unsupported bits in the termios */
1075 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1076
1077 if (C_BAUD(tty) == B0) {
1078 newline.dwDTERate = acm->line.dwDTERate;
1079 newctrl &= ~ACM_CTRL_DTR;
1080 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1081 newctrl |= ACM_CTRL_DTR;
1082 }
1083
1084 if (newctrl != acm->ctrlout)
1085 acm_set_control(acm, acm->ctrlout = newctrl);
1086
1087 if (memcmp(&acm->line, &newline, sizeof newline)) {
1088 memcpy(&acm->line, &newline, sizeof newline);
1089 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1090 __func__,
1091 le32_to_cpu(newline.dwDTERate),
1092 newline.bCharFormat, newline.bParityType,
1093 newline.bDataBits);
1094 acm_set_line(acm, &acm->line);
1095 }
1096 }
1097
1098 static const struct tty_port_operations acm_port_ops = {
1099 .dtr_rts = acm_port_dtr_rts,
1100 .shutdown = acm_port_shutdown,
1101 .activate = acm_port_activate,
1102 .destruct = acm_port_destruct,
1103 };
1104
1105 /*
1106 * USB probe and disconnect routines.
1107 */
1108
1109 /* Little helpers: write/read buffers free */
1110 static void acm_write_buffers_free(struct acm *acm)
1111 {
1112 int i;
1113 struct acm_wb *wb;
1114
1115 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1116 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1117 }
1118
1119 static void acm_read_buffers_free(struct acm *acm)
1120 {
1121 int i;
1122
1123 for (i = 0; i < acm->rx_buflimit; i++)
1124 usb_free_coherent(acm->dev, acm->readsize,
1125 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1126 }
1127
1128 /* Little helper: write buffers allocate */
1129 static int acm_write_buffers_alloc(struct acm *acm)
1130 {
1131 int i;
1132 struct acm_wb *wb;
1133
1134 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1135 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1136 &wb->dmah);
1137 if (!wb->buf) {
1138 while (i != 0) {
1139 --i;
1140 --wb;
1141 usb_free_coherent(acm->dev, acm->writesize,
1142 wb->buf, wb->dmah);
1143 }
1144 return -ENOMEM;
1145 }
1146 }
1147 return 0;
1148 }
1149
1150 static int acm_probe(struct usb_interface *intf,
1151 const struct usb_device_id *id)
1152 {
1153 struct usb_cdc_union_desc *union_header = NULL;
1154 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1155 unsigned char *buffer = intf->altsetting->extra;
1156 int buflen = intf->altsetting->extralen;
1157 struct usb_interface *control_interface;
1158 struct usb_interface *data_interface;
1159 struct usb_endpoint_descriptor *epctrl = NULL;
1160 struct usb_endpoint_descriptor *epread = NULL;
1161 struct usb_endpoint_descriptor *epwrite = NULL;
1162 struct usb_device *usb_dev = interface_to_usbdev(intf);
1163 struct usb_cdc_parsed_header h;
1164 struct acm *acm;
1165 int minor;
1166 int ctrlsize, readsize;
1167 u8 *buf;
1168 int call_intf_num = -1;
1169 int data_intf_num = -1;
1170 unsigned long quirks;
1171 int num_rx_buf;
1172 int i;
1173 int combined_interfaces = 0;
1174 struct device *tty_dev;
1175 int rv = -ENOMEM;
1176
1177 /* normal quirks */
1178 quirks = (unsigned long)id->driver_info;
1179
1180 if (quirks == IGNORE_DEVICE)
1181 return -ENODEV;
1182
1183 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1184
1185 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1186
1187 /* handle quirks deadly to normal probing*/
1188 if (quirks == NO_UNION_NORMAL) {
1189 data_interface = usb_ifnum_to_if(usb_dev, 1);
1190 control_interface = usb_ifnum_to_if(usb_dev, 0);
1191 /* we would crash */
1192 if (!data_interface || !control_interface)
1193 return -ENODEV;
1194 goto skip_normal_probe;
1195 }
1196
1197 /* normal probing*/
1198 if (!buffer) {
1199 dev_err(&intf->dev, "Weird descriptor references\n");
1200 return -EINVAL;
1201 }
1202
1203 if (!intf->cur_altsetting)
1204 return -EINVAL;
1205
1206 if (!buflen) {
1207 if (intf->cur_altsetting->endpoint &&
1208 intf->cur_altsetting->endpoint->extralen &&
1209 intf->cur_altsetting->endpoint->extra) {
1210 dev_dbg(&intf->dev,
1211 "Seeking extra descriptors on endpoint\n");
1212 buflen = intf->cur_altsetting->endpoint->extralen;
1213 buffer = intf->cur_altsetting->endpoint->extra;
1214 } else {
1215 dev_err(&intf->dev,
1216 "Zero length descriptor references\n");
1217 return -EINVAL;
1218 }
1219 }
1220
1221 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1222 union_header = h.usb_cdc_union_desc;
1223 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1224 if (cmgmd)
1225 call_intf_num = cmgmd->bDataInterface;
1226
1227 if (!union_header) {
1228 if (call_intf_num > 0) {
1229 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1230 /* quirks for Droids MuIn LCD */
1231 if (quirks & NO_DATA_INTERFACE) {
1232 data_interface = usb_ifnum_to_if(usb_dev, 0);
1233 } else {
1234 data_intf_num = call_intf_num;
1235 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1236 }
1237 control_interface = intf;
1238 } else {
1239 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1240 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1241 return -ENODEV;
1242 } else {
1243 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1244 combined_interfaces = 1;
1245 control_interface = data_interface = intf;
1246 goto look_for_collapsed_interface;
1247 }
1248 }
1249 } else {
1250 data_intf_num = union_header->bSlaveInterface0;
1251 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1252 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1253 }
1254
1255 if (!control_interface || !data_interface) {
1256 dev_dbg(&intf->dev, "no interfaces\n");
1257 return -ENODEV;
1258 }
1259 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1260 return -ENODEV;
1261
1262 if (data_intf_num != call_intf_num)
1263 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1264
1265 if (control_interface == data_interface) {
1266 /* some broken devices designed for windows work this way */
1267 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1268 combined_interfaces = 1;
1269 /* a popular other OS doesn't use it */
1270 quirks |= NO_CAP_LINE;
1271 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1272 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1273 return -EINVAL;
1274 }
1275 look_for_collapsed_interface:
1276 for (i = 0; i < 3; i++) {
1277 struct usb_endpoint_descriptor *ep;
1278 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1279
1280 if (usb_endpoint_is_int_in(ep))
1281 epctrl = ep;
1282 else if (usb_endpoint_is_bulk_out(ep))
1283 epwrite = ep;
1284 else if (usb_endpoint_is_bulk_in(ep))
1285 epread = ep;
1286 else
1287 return -EINVAL;
1288 }
1289 if (!epctrl || !epread || !epwrite)
1290 return -ENODEV;
1291 else
1292 goto made_compressed_probe;
1293 }
1294
1295 skip_normal_probe:
1296
1297 /*workaround for switched interfaces */
1298 if (data_interface->cur_altsetting->desc.bInterfaceClass
1299 != CDC_DATA_INTERFACE_TYPE) {
1300 if (control_interface->cur_altsetting->desc.bInterfaceClass
1301 == CDC_DATA_INTERFACE_TYPE) {
1302 dev_dbg(&intf->dev,
1303 "Your device has switched interfaces.\n");
1304 swap(control_interface, data_interface);
1305 } else {
1306 return -EINVAL;
1307 }
1308 }
1309
1310 /* Accept probe requests only for the control interface */
1311 if (!combined_interfaces && intf != control_interface)
1312 return -ENODEV;
1313
1314 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1315 /* valid in this context */
1316 dev_dbg(&intf->dev, "The data interface isn't available\n");
1317 return -EBUSY;
1318 }
1319
1320
1321 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1322 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1323 return -EINVAL;
1324
1325 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1326 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1327 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1328
1329
1330 /* workaround for switched endpoints */
1331 if (!usb_endpoint_dir_in(epread)) {
1332 /* descriptors are swapped */
1333 dev_dbg(&intf->dev,
1334 "The data interface has switched endpoints\n");
1335 swap(epread, epwrite);
1336 }
1337 made_compressed_probe:
1338 dev_dbg(&intf->dev, "interfaces are valid\n");
1339
1340 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1341 if (acm == NULL)
1342 goto alloc_fail;
1343
1344 minor = acm_alloc_minor(acm);
1345 if (minor < 0)
1346 goto alloc_fail1;
1347
1348 ctrlsize = usb_endpoint_maxp(epctrl);
1349 readsize = usb_endpoint_maxp(epread) *
1350 (quirks == SINGLE_RX_URB ? 1 : 2);
1351 acm->combined_interfaces = combined_interfaces;
1352 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1353 acm->control = control_interface;
1354 acm->data = data_interface;
1355 acm->minor = minor;
1356 acm->dev = usb_dev;
1357 if (h.usb_cdc_acm_descriptor)
1358 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1359 if (quirks & NO_CAP_LINE)
1360 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1361 acm->ctrlsize = ctrlsize;
1362 acm->readsize = readsize;
1363 acm->rx_buflimit = num_rx_buf;
1364 INIT_WORK(&acm->work, acm_softint);
1365 init_waitqueue_head(&acm->wioctl);
1366 spin_lock_init(&acm->write_lock);
1367 spin_lock_init(&acm->read_lock);
1368 mutex_init(&acm->mutex);
1369 if (usb_endpoint_xfer_int(epread)) {
1370 acm->bInterval = epread->bInterval;
1371 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1372 } else {
1373 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1374 }
1375 if (usb_endpoint_xfer_int(epwrite))
1376 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1377 else
1378 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1379 tty_port_init(&acm->port);
1380 acm->port.ops = &acm_port_ops;
1381 init_usb_anchor(&acm->delayed);
1382 acm->quirks = quirks;
1383
1384 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1385 if (!buf)
1386 goto alloc_fail2;
1387 acm->ctrl_buffer = buf;
1388
1389 if (acm_write_buffers_alloc(acm) < 0)
1390 goto alloc_fail4;
1391
1392 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1393 if (!acm->ctrlurb)
1394 goto alloc_fail5;
1395
1396 for (i = 0; i < num_rx_buf; i++) {
1397 struct acm_rb *rb = &(acm->read_buffers[i]);
1398 struct urb *urb;
1399
1400 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1401 &rb->dma);
1402 if (!rb->base)
1403 goto alloc_fail6;
1404 rb->index = i;
1405 rb->instance = acm;
1406
1407 urb = usb_alloc_urb(0, GFP_KERNEL);
1408 if (!urb)
1409 goto alloc_fail6;
1410
1411 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1412 urb->transfer_dma = rb->dma;
1413 if (usb_endpoint_xfer_int(epread))
1414 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1415 acm->readsize,
1416 acm_read_bulk_callback, rb,
1417 acm->bInterval);
1418 else
1419 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1420 acm->readsize,
1421 acm_read_bulk_callback, rb);
1422
1423 acm->read_urbs[i] = urb;
1424 __set_bit(i, &acm->read_urbs_free);
1425 }
1426 for (i = 0; i < ACM_NW; i++) {
1427 struct acm_wb *snd = &(acm->wb[i]);
1428
1429 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1430 if (snd->urb == NULL)
1431 goto alloc_fail7;
1432
1433 if (usb_endpoint_xfer_int(epwrite))
1434 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1435 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1436 else
1437 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1438 NULL, acm->writesize, acm_write_bulk, snd);
1439 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1440 if (quirks & SEND_ZERO_PACKET)
1441 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1442 snd->instance = acm;
1443 }
1444
1445 usb_set_intfdata(intf, acm);
1446
1447 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1448 if (i < 0)
1449 goto alloc_fail7;
1450
1451 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1452 struct usb_cdc_country_functional_desc * cfd =
1453 h.usb_cdc_country_functional_desc;
1454
1455 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1456 if (!acm->country_codes)
1457 goto skip_countries;
1458 acm->country_code_size = cfd->bLength - 4;
1459 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1460 cfd->bLength - 4);
1461 acm->country_rel_date = cfd->iCountryCodeRelDate;
1462
1463 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1464 if (i < 0) {
1465 kfree(acm->country_codes);
1466 acm->country_codes = NULL;
1467 acm->country_code_size = 0;
1468 goto skip_countries;
1469 }
1470
1471 i = device_create_file(&intf->dev,
1472 &dev_attr_iCountryCodeRelDate);
1473 if (i < 0) {
1474 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1475 kfree(acm->country_codes);
1476 acm->country_codes = NULL;
1477 acm->country_code_size = 0;
1478 goto skip_countries;
1479 }
1480 }
1481
1482 skip_countries:
1483 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1484 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1485 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1486 /* works around buggy devices */
1487 epctrl->bInterval ? epctrl->bInterval : 16);
1488 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1489 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1490
1491 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1492
1493 acm->line.dwDTERate = cpu_to_le32(9600);
1494 acm->line.bDataBits = 8;
1495 acm_set_line(acm, &acm->line);
1496
1497 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1498 usb_set_intfdata(data_interface, acm);
1499
1500 usb_get_intf(control_interface);
1501 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1502 &control_interface->dev);
1503 if (IS_ERR(tty_dev)) {
1504 rv = PTR_ERR(tty_dev);
1505 goto alloc_fail8;
1506 }
1507
1508 if (quirks & CLEAR_HALT_CONDITIONS) {
1509 usb_clear_halt(usb_dev, acm->in);
1510 usb_clear_halt(usb_dev, acm->out);
1511 }
1512
1513 return 0;
1514 alloc_fail8:
1515 if (acm->country_codes) {
1516 device_remove_file(&acm->control->dev,
1517 &dev_attr_wCountryCodes);
1518 device_remove_file(&acm->control->dev,
1519 &dev_attr_iCountryCodeRelDate);
1520 kfree(acm->country_codes);
1521 }
1522 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1523 alloc_fail7:
1524 usb_set_intfdata(intf, NULL);
1525 for (i = 0; i < ACM_NW; i++)
1526 usb_free_urb(acm->wb[i].urb);
1527 alloc_fail6:
1528 for (i = 0; i < num_rx_buf; i++)
1529 usb_free_urb(acm->read_urbs[i]);
1530 acm_read_buffers_free(acm);
1531 usb_free_urb(acm->ctrlurb);
1532 alloc_fail5:
1533 acm_write_buffers_free(acm);
1534 alloc_fail4:
1535 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1536 alloc_fail2:
1537 acm_release_minor(acm);
1538 alloc_fail1:
1539 kfree(acm);
1540 alloc_fail:
1541 return rv;
1542 }
1543
1544 static void acm_disconnect(struct usb_interface *intf)
1545 {
1546 struct acm *acm = usb_get_intfdata(intf);
1547 struct tty_struct *tty;
1548
1549 /* sibling interface is already cleaning up */
1550 if (!acm)
1551 return;
1552
1553 mutex_lock(&acm->mutex);
1554 acm->disconnected = true;
1555 if (acm->country_codes) {
1556 device_remove_file(&acm->control->dev,
1557 &dev_attr_wCountryCodes);
1558 device_remove_file(&acm->control->dev,
1559 &dev_attr_iCountryCodeRelDate);
1560 }
1561 wake_up_all(&acm->wioctl);
1562 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1563 usb_set_intfdata(acm->control, NULL);
1564 usb_set_intfdata(acm->data, NULL);
1565 mutex_unlock(&acm->mutex);
1566
1567 tty = tty_port_tty_get(&acm->port);
1568 if (tty) {
1569 tty_vhangup(tty);
1570 tty_kref_put(tty);
1571 }
1572
1573 acm_kill_urbs(acm);
1574 cancel_work_sync(&acm->work);
1575
1576 tty_unregister_device(acm_tty_driver, acm->minor);
1577
1578 acm_write_buffers_free(acm);
1579 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1580 acm_read_buffers_free(acm);
1581
1582 if (!acm->combined_interfaces)
1583 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1584 acm->data : acm->control);
1585
1586 tty_port_put(&acm->port);
1587 }
1588
1589 #ifdef CONFIG_PM
1590 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1591 {
1592 struct acm *acm = usb_get_intfdata(intf);
1593 int cnt;
1594
1595 spin_lock_irq(&acm->write_lock);
1596 if (PMSG_IS_AUTO(message)) {
1597 if (acm->transmitting) {
1598 spin_unlock_irq(&acm->write_lock);
1599 return -EBUSY;
1600 }
1601 }
1602 cnt = acm->susp_count++;
1603 spin_unlock_irq(&acm->write_lock);
1604
1605 if (cnt)
1606 return 0;
1607
1608 acm_kill_urbs(acm);
1609 cancel_work_sync(&acm->work);
1610
1611 return 0;
1612 }
1613
1614 static int acm_resume(struct usb_interface *intf)
1615 {
1616 struct acm *acm = usb_get_intfdata(intf);
1617 struct urb *urb;
1618 int rv = 0;
1619
1620 spin_lock_irq(&acm->write_lock);
1621
1622 if (--acm->susp_count)
1623 goto out;
1624
1625 if (tty_port_initialized(&acm->port)) {
1626 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1627
1628 for (;;) {
1629 urb = usb_get_from_anchor(&acm->delayed);
1630 if (!urb)
1631 break;
1632
1633 acm_start_wb(acm, urb->context);
1634 }
1635
1636 /*
1637 * delayed error checking because we must
1638 * do the write path at all cost
1639 */
1640 if (rv < 0)
1641 goto out;
1642
1643 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1644 }
1645 out:
1646 spin_unlock_irq(&acm->write_lock);
1647
1648 return rv;
1649 }
1650
1651 static int acm_reset_resume(struct usb_interface *intf)
1652 {
1653 struct acm *acm = usb_get_intfdata(intf);
1654
1655 if (tty_port_initialized(&acm->port))
1656 tty_port_tty_hangup(&acm->port, false);
1657
1658 return acm_resume(intf);
1659 }
1660
1661 #endif /* CONFIG_PM */
1662
1663 static int acm_pre_reset(struct usb_interface *intf)
1664 {
1665 struct acm *acm = usb_get_intfdata(intf);
1666
1667 clear_bit(EVENT_RX_STALL, &acm->flags);
1668
1669 return 0;
1670 }
1671
1672 #define NOKIA_PCSUITE_ACM_INFO(x) \
1673 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1674 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1675 USB_CDC_ACM_PROTO_VENDOR)
1676
1677 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1678 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1679 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1680 USB_CDC_ACM_PROTO_VENDOR)
1681
1682 /*
1683 * USB driver structure.
1684 */
1685
1686 static const struct usb_device_id acm_ids[] = {
1687 /* quirky and broken devices */
1688 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1689 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1690 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1691 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1692 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1693 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1694 },
1695 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1696 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1697 },
1698 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1699 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1700 },
1701 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1702 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1703 },
1704 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1705 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1706 },
1707 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1708 .driver_info = SINGLE_RX_URB,
1709 },
1710 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1711 .driver_info = SINGLE_RX_URB, /* firmware bug */
1712 },
1713 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1714 .driver_info = SINGLE_RX_URB, /* firmware bug */
1715 },
1716 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1717 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1718 },
1719 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1720 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1721 },
1722 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1723 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1724 },
1725 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1726 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1727 },
1728 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1729 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1730 },
1731 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1732 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1733 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1734 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1735 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1736 },
1737 /* Motorola H24 HSPA module: */
1738 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1739 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1740 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1741 },
1742 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1743 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1744 },
1745 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1746 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1747 },
1748 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1749 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1750 },
1751 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1752 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1753 },
1754 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1755 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1756 },
1757 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1758 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1759 },
1760
1761 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1762 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1763 data interface instead of
1764 communications interface.
1765 Maybe we should define a new
1766 quirk for this. */
1767 },
1768 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1769 .driver_info = NO_UNION_NORMAL,
1770 },
1771 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1772 .driver_info = NO_UNION_NORMAL,
1773 },
1774 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1775 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1776 },
1777 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1778 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1779 },
1780
1781 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1782 .driver_info = CLEAR_HALT_CONDITIONS,
1783 },
1784
1785 /* Nokia S60 phones expose two ACM channels. The first is
1786 * a modem and is picked up by the standard AT-command
1787 * information below. The second is 'vendor-specific' but
1788 * is treated as a serial device at the S60 end, so we want
1789 * to expose it on Linux too. */
1790 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1792 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1796 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1802 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1805 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1808 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1809 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1810 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1811 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1812 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1813 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1819 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1822 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1823 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1826 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1827 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1830 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1831 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1832 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1833 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1834 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1836 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1837 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1838 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1839 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1840 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1841 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1842 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1844 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1845 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1847 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1848
1849 /* Support for Owen devices */
1850 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1851
1852 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1853
1854 /* Support for Droids MuIn LCD */
1855 { USB_DEVICE(0x04d8, 0x000b),
1856 .driver_info = NO_DATA_INTERFACE,
1857 },
1858
1859 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1860 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1861 .driver_info = IGNORE_DEVICE,
1862 },
1863 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1864 .driver_info = IGNORE_DEVICE,
1865 },
1866 #endif
1867
1868 /*Samsung phone in firmware update mode */
1869 { USB_DEVICE(0x04e8, 0x685d),
1870 .driver_info = IGNORE_DEVICE,
1871 },
1872
1873 /* Exclude Infineon Flash Loader utility */
1874 { USB_DEVICE(0x058b, 0x0041),
1875 .driver_info = IGNORE_DEVICE,
1876 },
1877
1878 /* control interfaces without any protocol set */
1879 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1880 USB_CDC_PROTO_NONE) },
1881
1882 /* control interfaces with various AT-command sets */
1883 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1884 USB_CDC_ACM_PROTO_AT_V25TER) },
1885 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1886 USB_CDC_ACM_PROTO_AT_PCCA101) },
1887 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1888 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1889 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1890 USB_CDC_ACM_PROTO_AT_GSM) },
1891 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1892 USB_CDC_ACM_PROTO_AT_3G) },
1893 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1894 USB_CDC_ACM_PROTO_AT_CDMA) },
1895
1896 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1897 .driver_info = SEND_ZERO_PACKET,
1898 },
1899
1900 { }
1901 };
1902
1903 MODULE_DEVICE_TABLE(usb, acm_ids);
1904
1905 static struct usb_driver acm_driver = {
1906 .name = "cdc_acm",
1907 .probe = acm_probe,
1908 .disconnect = acm_disconnect,
1909 #ifdef CONFIG_PM
1910 .suspend = acm_suspend,
1911 .resume = acm_resume,
1912 .reset_resume = acm_reset_resume,
1913 #endif
1914 .pre_reset = acm_pre_reset,
1915 .id_table = acm_ids,
1916 #ifdef CONFIG_PM
1917 .supports_autosuspend = 1,
1918 #endif
1919 .disable_hub_initiated_lpm = 1,
1920 };
1921
1922 /*
1923 * TTY driver structures.
1924 */
1925
1926 static const struct tty_operations acm_ops = {
1927 .install = acm_tty_install,
1928 .open = acm_tty_open,
1929 .close = acm_tty_close,
1930 .cleanup = acm_tty_cleanup,
1931 .hangup = acm_tty_hangup,
1932 .write = acm_tty_write,
1933 .put_char = acm_tty_put_char,
1934 .flush_chars = acm_tty_flush_chars,
1935 .write_room = acm_tty_write_room,
1936 .ioctl = acm_tty_ioctl,
1937 .throttle = acm_tty_throttle,
1938 .unthrottle = acm_tty_unthrottle,
1939 .chars_in_buffer = acm_tty_chars_in_buffer,
1940 .break_ctl = acm_tty_break_ctl,
1941 .set_termios = acm_tty_set_termios,
1942 .tiocmget = acm_tty_tiocmget,
1943 .tiocmset = acm_tty_tiocmset,
1944 .get_icount = acm_tty_get_icount,
1945 };
1946
1947 /*
1948 * Init / exit.
1949 */
1950
1951 static int __init acm_init(void)
1952 {
1953 int retval;
1954 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1955 if (!acm_tty_driver)
1956 return -ENOMEM;
1957 acm_tty_driver->driver_name = "acm",
1958 acm_tty_driver->name = "ttyACM",
1959 acm_tty_driver->major = ACM_TTY_MAJOR,
1960 acm_tty_driver->minor_start = 0,
1961 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1962 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1963 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1964 acm_tty_driver->init_termios = tty_std_termios;
1965 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1966 HUPCL | CLOCAL;
1967 tty_set_operations(acm_tty_driver, &acm_ops);
1968
1969 retval = tty_register_driver(acm_tty_driver);
1970 if (retval) {
1971 put_tty_driver(acm_tty_driver);
1972 return retval;
1973 }
1974
1975 retval = usb_register(&acm_driver);
1976 if (retval) {
1977 tty_unregister_driver(acm_tty_driver);
1978 put_tty_driver(acm_tty_driver);
1979 return retval;
1980 }
1981
1982 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1983
1984 return 0;
1985 }
1986
1987 static void __exit acm_exit(void)
1988 {
1989 usb_deregister(&acm_driver);
1990 tty_unregister_driver(acm_tty_driver);
1991 put_tty_driver(acm_tty_driver);
1992 idr_destroy(&acm_minors);
1993 }
1994
1995 module_init(acm_init);
1996 module_exit(acm_exit);
1997
1998 MODULE_AUTHOR(DRIVER_AUTHOR);
1999 MODULE_DESCRIPTION(DRIVER_DESC);
2000 MODULE_LICENSE("GPL");
2001 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Ubuntu Artful kernel mirror