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1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31#undef DEBUG
32#undef VERBOSE_DEBUG
33
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/init.h>
37#include <linux/slab.h>
38#include <linux/tty.h>
39#include <linux/serial.h>
40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
43#include <linux/mutex.h>
44#include <linux/uaccess.h>
45#include <linux/usb.h>
46#include <linux/usb/cdc.h>
47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
49#include <linux/list.h>
50
51#include "cdc-acm.h"
52
53
54#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
55#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57static struct usb_driver acm_driver;
58static struct tty_driver *acm_tty_driver;
59static struct acm *acm_table[ACM_TTY_MINORS];
60
61static DEFINE_MUTEX(acm_table_lock);
62
63/*
64 * acm_table accessors
65 */
66
67/*
68 * Look up an ACM structure by index. If found and not disconnected, increment
69 * its refcount and return it with its mutex held.
70 */
71static struct acm *acm_get_by_index(unsigned index)
72{
73 struct acm *acm;
74
75 mutex_lock(&acm_table_lock);
76 acm = acm_table[index];
77 if (acm) {
78 mutex_lock(&acm->mutex);
79 if (acm->disconnected) {
80 mutex_unlock(&acm->mutex);
81 acm = NULL;
82 } else {
83 tty_port_get(&acm->port);
84 mutex_unlock(&acm->mutex);
85 }
86 }
87 mutex_unlock(&acm_table_lock);
88 return acm;
89}
90
91/*
92 * Try to find an available minor number and if found, associate it with 'acm'.
93 */
94static int acm_alloc_minor(struct acm *acm)
95{
96 int minor;
97
98 mutex_lock(&acm_table_lock);
99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
100 if (!acm_table[minor]) {
101 acm_table[minor] = acm;
102 break;
103 }
104 }
105 mutex_unlock(&acm_table_lock);
106
107 return minor;
108}
109
110/* Release the minor number associated with 'acm'. */
111static void acm_release_minor(struct acm *acm)
112{
113 mutex_lock(&acm_table_lock);
114 acm_table[acm->minor] = NULL;
115 mutex_unlock(&acm_table_lock);
116}
117
118/*
119 * Functions for ACM control messages.
120 */
121
122static int acm_ctrl_msg(struct acm *acm, int request, int value,
123 void *buf, int len)
124{
125 int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
126 request, USB_RT_ACM, value,
127 acm->control->altsetting[0].desc.bInterfaceNumber,
128 buf, len, 5000);
129 dev_dbg(&acm->control->dev,
130 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
131 __func__, request, value, len, retval);
132 return retval < 0 ? retval : 0;
133}
134
135/* devices aren't required to support these requests.
136 * the cdc acm descriptor tells whether they do...
137 */
138#define acm_set_control(acm, control) \
139 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
140#define acm_set_line(acm, line) \
141 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
142#define acm_send_break(acm, ms) \
143 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
144
145/*
146 * Write buffer management.
147 * All of these assume proper locks taken by the caller.
148 */
149
150static int acm_wb_alloc(struct acm *acm)
151{
152 int i, wbn;
153 struct acm_wb *wb;
154
155 wbn = 0;
156 i = 0;
157 for (;;) {
158 wb = &acm->wb[wbn];
159 if (!wb->use) {
160 wb->use = 1;
161 return wbn;
162 }
163 wbn = (wbn + 1) % ACM_NW;
164 if (++i >= ACM_NW)
165 return -1;
166 }
167}
168
169static int acm_wb_is_avail(struct acm *acm)
170{
171 int i, n;
172 unsigned long flags;
173
174 n = ACM_NW;
175 spin_lock_irqsave(&acm->write_lock, flags);
176 for (i = 0; i < ACM_NW; i++)
177 n -= acm->wb[i].use;
178 spin_unlock_irqrestore(&acm->write_lock, flags);
179 return n;
180}
181
182/*
183 * Finish write. Caller must hold acm->write_lock
184 */
185static void acm_write_done(struct acm *acm, struct acm_wb *wb)
186{
187 wb->use = 0;
188 acm->transmitting--;
189 usb_autopm_put_interface_async(acm->control);
190}
191
192/*
193 * Poke write.
194 *
195 * the caller is responsible for locking
196 */
197
198static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
199{
200 int rc;
201
202 acm->transmitting++;
203
204 wb->urb->transfer_buffer = wb->buf;
205 wb->urb->transfer_dma = wb->dmah;
206 wb->urb->transfer_buffer_length = wb->len;
207 wb->urb->dev = acm->dev;
208
209 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
210 if (rc < 0) {
211 dev_err(&acm->data->dev,
212 "%s - usb_submit_urb(write bulk) failed: %d\n",
213 __func__, rc);
214 acm_write_done(acm, wb);
215 }
216 return rc;
217}
218
219/*
220 * attributes exported through sysfs
221 */
222static ssize_t show_caps
223(struct device *dev, struct device_attribute *attr, char *buf)
224{
225 struct usb_interface *intf = to_usb_interface(dev);
226 struct acm *acm = usb_get_intfdata(intf);
227
228 return sprintf(buf, "%d", acm->ctrl_caps);
229}
230static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
231
232static ssize_t show_country_codes
233(struct device *dev, struct device_attribute *attr, char *buf)
234{
235 struct usb_interface *intf = to_usb_interface(dev);
236 struct acm *acm = usb_get_intfdata(intf);
237
238 memcpy(buf, acm->country_codes, acm->country_code_size);
239 return acm->country_code_size;
240}
241
242static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
243
244static ssize_t show_country_rel_date
245(struct device *dev, struct device_attribute *attr, char *buf)
246{
247 struct usb_interface *intf = to_usb_interface(dev);
248 struct acm *acm = usb_get_intfdata(intf);
249
250 return sprintf(buf, "%d", acm->country_rel_date);
251}
252
253static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
254/*
255 * Interrupt handlers for various ACM device responses
256 */
257
258/* control interface reports status changes with "interrupt" transfers */
259static void acm_ctrl_irq(struct urb *urb)
260{
261 struct acm *acm = urb->context;
262 struct usb_cdc_notification *dr = urb->transfer_buffer;
263 unsigned char *data;
264 int newctrl;
265 int difference;
266 int retval;
267 int status = urb->status;
268
269 switch (status) {
270 case 0:
271 /* success */
272 break;
273 case -ECONNRESET:
274 case -ENOENT:
275 case -ESHUTDOWN:
276 /* this urb is terminated, clean up */
277 dev_dbg(&acm->control->dev,
278 "%s - urb shutting down with status: %d\n",
279 __func__, status);
280 return;
281 default:
282 dev_dbg(&acm->control->dev,
283 "%s - nonzero urb status received: %d\n",
284 __func__, status);
285 goto exit;
286 }
287
288 usb_mark_last_busy(acm->dev);
289
290 data = (unsigned char *)(dr + 1);
291 switch (dr->bNotificationType) {
292 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
293 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
294 __func__, dr->wValue);
295 break;
296
297 case USB_CDC_NOTIFY_SERIAL_STATE:
298 newctrl = get_unaligned_le16(data);
299
300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
301 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
302 __func__);
303 tty_port_tty_hangup(&acm->port, false);
304 }
305
306 difference = acm->ctrlin ^ newctrl;
307 spin_lock(&acm->read_lock);
308 acm->ctrlin = newctrl;
309 acm->oldcount = acm->iocount;
310
311 if (difference & ACM_CTRL_DSR)
312 acm->iocount.dsr++;
313 if (difference & ACM_CTRL_BRK)
314 acm->iocount.brk++;
315 if (difference & ACM_CTRL_RI)
316 acm->iocount.rng++;
317 if (difference & ACM_CTRL_DCD)
318 acm->iocount.dcd++;
319 if (difference & ACM_CTRL_FRAMING)
320 acm->iocount.frame++;
321 if (difference & ACM_CTRL_PARITY)
322 acm->iocount.parity++;
323 if (difference & ACM_CTRL_OVERRUN)
324 acm->iocount.overrun++;
325 spin_unlock(&acm->read_lock);
326
327 if (difference)
328 wake_up_all(&acm->wioctl);
329
330 break;
331
332 default:
333 dev_dbg(&acm->control->dev,
334 "%s - unknown notification %d received: index %d "
335 "len %d data0 %d data1 %d\n",
336 __func__,
337 dr->bNotificationType, dr->wIndex,
338 dr->wLength, data[0], data[1]);
339 break;
340 }
341exit:
342 retval = usb_submit_urb(urb, GFP_ATOMIC);
343 if (retval)
344 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
345 __func__, retval);
346}
347
348static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
349{
350 int res;
351
352 if (!test_and_clear_bit(index, &acm->read_urbs_free))
353 return 0;
354
355 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
356
357 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
358 if (res) {
359 if (res != -EPERM) {
360 dev_err(&acm->data->dev,
361 "%s - usb_submit_urb failed: %d\n",
362 __func__, res);
363 }
364 set_bit(index, &acm->read_urbs_free);
365 return res;
366 }
367
368 return 0;
369}
370
371static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
372{
373 int res;
374 int i;
375
376 for (i = 0; i < acm->rx_buflimit; ++i) {
377 res = acm_submit_read_urb(acm, i, mem_flags);
378 if (res)
379 return res;
380 }
381
382 return 0;
383}
384
385static void acm_process_read_urb(struct acm *acm, struct urb *urb)
386{
387 if (!urb->actual_length)
388 return;
389
390 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
391 urb->actual_length);
392 tty_flip_buffer_push(&acm->port);
393}
394
395static void acm_read_bulk_callback(struct urb *urb)
396{
397 struct acm_rb *rb = urb->context;
398 struct acm *acm = rb->instance;
399 unsigned long flags;
400
401 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
402 rb->index, urb->actual_length);
403 set_bit(rb->index, &acm->read_urbs_free);
404
405 if (!acm->dev) {
406 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
407 return;
408 }
409 usb_mark_last_busy(acm->dev);
410
411 if (urb->status) {
412 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
413 __func__, urb->status);
414 return;
415 }
416 acm_process_read_urb(acm, urb);
417
418 /* throttle device if requested by tty */
419 spin_lock_irqsave(&acm->read_lock, flags);
420 acm->throttled = acm->throttle_req;
421 if (!acm->throttled && !acm->susp_count) {
422 spin_unlock_irqrestore(&acm->read_lock, flags);
423 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
424 } else {
425 spin_unlock_irqrestore(&acm->read_lock, flags);
426 }
427}
428
429/* data interface wrote those outgoing bytes */
430static void acm_write_bulk(struct urb *urb)
431{
432 struct acm_wb *wb = urb->context;
433 struct acm *acm = wb->instance;
434 unsigned long flags;
435
436 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
437 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
438 __func__,
439 urb->actual_length,
440 urb->transfer_buffer_length,
441 urb->status);
442
443 spin_lock_irqsave(&acm->write_lock, flags);
444 acm_write_done(acm, wb);
445 spin_unlock_irqrestore(&acm->write_lock, flags);
446 schedule_work(&acm->work);
447}
448
449static void acm_softint(struct work_struct *work)
450{
451 struct acm *acm = container_of(work, struct acm, work);
452
453 dev_vdbg(&acm->data->dev, "%s\n", __func__);
454
455 tty_port_tty_wakeup(&acm->port);
456}
457
458/*
459 * TTY handlers
460 */
461
462static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
463{
464 struct acm *acm;
465 int retval;
466
467 dev_dbg(tty->dev, "%s\n", __func__);
468
469 acm = acm_get_by_index(tty->index);
470 if (!acm)
471 return -ENODEV;
472
473 retval = tty_standard_install(driver, tty);
474 if (retval)
475 goto error_init_termios;
476
477 tty->driver_data = acm;
478
479 return 0;
480
481error_init_termios:
482 tty_port_put(&acm->port);
483 return retval;
484}
485
486static int acm_tty_open(struct tty_struct *tty, struct file *filp)
487{
488 struct acm *acm = tty->driver_data;
489
490 dev_dbg(tty->dev, "%s\n", __func__);
491
492 return tty_port_open(&acm->port, tty, filp);
493}
494
495static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
496{
497 struct acm *acm = container_of(port, struct acm, port);
498 int retval = -ENODEV;
499
500 dev_dbg(&acm->control->dev, "%s\n", __func__);
501
502 mutex_lock(&acm->mutex);
503 if (acm->disconnected)
504 goto disconnected;
505
506 retval = usb_autopm_get_interface(acm->control);
507 if (retval)
508 goto error_get_interface;
509
510 /*
511 * FIXME: Why do we need this? Allocating 64K of physically contiguous
512 * memory is really nasty...
513 */
514 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
515 acm->control->needs_remote_wakeup = 1;
516
517 acm->ctrlurb->dev = acm->dev;
518 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
519 dev_err(&acm->control->dev,
520 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
521 usb_autopm_put_interface(acm->control);
522 goto error_submit_urb;
523 }
524
525 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
526 if (acm_set_control(acm, acm->ctrlout) < 0 &&
527 (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
528 usb_autopm_put_interface(acm->control);
529 goto error_set_control;
530 }
531
532 usb_autopm_put_interface(acm->control);
533
534 /*
535 * Unthrottle device in case the TTY was closed while throttled.
536 */
537 spin_lock_irq(&acm->read_lock);
538 acm->throttled = 0;
539 acm->throttle_req = 0;
540 spin_unlock_irq(&acm->read_lock);
541
542 if (acm_submit_read_urbs(acm, GFP_KERNEL))
543 goto error_submit_read_urbs;
544
545 mutex_unlock(&acm->mutex);
546
547 return 0;
548
549error_submit_read_urbs:
550 acm->ctrlout = 0;
551 acm_set_control(acm, acm->ctrlout);
552error_set_control:
553 usb_kill_urb(acm->ctrlurb);
554error_submit_urb:
555error_get_interface:
556disconnected:
557 mutex_unlock(&acm->mutex);
558 return retval;
559}
560
561static void acm_port_destruct(struct tty_port *port)
562{
563 struct acm *acm = container_of(port, struct acm, port);
564
565 dev_dbg(&acm->control->dev, "%s\n", __func__);
566
567 acm_release_minor(acm);
568 usb_put_intf(acm->control);
569 kfree(acm->country_codes);
570 kfree(acm);
571}
572
573static void acm_port_shutdown(struct tty_port *port)
574{
575 struct acm *acm = container_of(port, struct acm, port);
576 int i;
577
578 dev_dbg(&acm->control->dev, "%s\n", __func__);
579
580 mutex_lock(&acm->mutex);
581 if (!acm->disconnected) {
582 usb_autopm_get_interface(acm->control);
583 acm_set_control(acm, acm->ctrlout = 0);
584 usb_kill_urb(acm->ctrlurb);
585 for (i = 0; i < ACM_NW; i++)
586 usb_kill_urb(acm->wb[i].urb);
587 for (i = 0; i < acm->rx_buflimit; i++)
588 usb_kill_urb(acm->read_urbs[i]);
589 acm->control->needs_remote_wakeup = 0;
590 usb_autopm_put_interface(acm->control);
591 }
592 mutex_unlock(&acm->mutex);
593}
594
595static void acm_tty_cleanup(struct tty_struct *tty)
596{
597 struct acm *acm = tty->driver_data;
598 dev_dbg(&acm->control->dev, "%s\n", __func__);
599 tty_port_put(&acm->port);
600}
601
602static void acm_tty_hangup(struct tty_struct *tty)
603{
604 struct acm *acm = tty->driver_data;
605 dev_dbg(&acm->control->dev, "%s\n", __func__);
606 tty_port_hangup(&acm->port);
607}
608
609static void acm_tty_close(struct tty_struct *tty, struct file *filp)
610{
611 struct acm *acm = tty->driver_data;
612 dev_dbg(&acm->control->dev, "%s\n", __func__);
613 tty_port_close(&acm->port, tty, filp);
614}
615
616static int acm_tty_write(struct tty_struct *tty,
617 const unsigned char *buf, int count)
618{
619 struct acm *acm = tty->driver_data;
620 int stat;
621 unsigned long flags;
622 int wbn;
623 struct acm_wb *wb;
624
625 if (!count)
626 return 0;
627
628 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
629
630 spin_lock_irqsave(&acm->write_lock, flags);
631 wbn = acm_wb_alloc(acm);
632 if (wbn < 0) {
633 spin_unlock_irqrestore(&acm->write_lock, flags);
634 return 0;
635 }
636 wb = &acm->wb[wbn];
637
638 if (!acm->dev) {
639 wb->use = 0;
640 spin_unlock_irqrestore(&acm->write_lock, flags);
641 return -ENODEV;
642 }
643
644 count = (count > acm->writesize) ? acm->writesize : count;
645 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
646 memcpy(wb->buf, buf, count);
647 wb->len = count;
648
649 usb_autopm_get_interface_async(acm->control);
650 if (acm->susp_count) {
651 if (!acm->delayed_wb)
652 acm->delayed_wb = wb;
653 else
654 usb_autopm_put_interface_async(acm->control);
655 spin_unlock_irqrestore(&acm->write_lock, flags);
656 return count; /* A white lie */
657 }
658 usb_mark_last_busy(acm->dev);
659
660 stat = acm_start_wb(acm, wb);
661 spin_unlock_irqrestore(&acm->write_lock, flags);
662
663 if (stat < 0)
664 return stat;
665 return count;
666}
667
668static int acm_tty_write_room(struct tty_struct *tty)
669{
670 struct acm *acm = tty->driver_data;
671 /*
672 * Do not let the line discipline to know that we have a reserve,
673 * or it might get too enthusiastic.
674 */
675 return acm_wb_is_avail(acm) ? acm->writesize : 0;
676}
677
678static int acm_tty_chars_in_buffer(struct tty_struct *tty)
679{
680 struct acm *acm = tty->driver_data;
681 /*
682 * if the device was unplugged then any remaining characters fell out
683 * of the connector ;)
684 */
685 if (acm->disconnected)
686 return 0;
687 /*
688 * This is inaccurate (overcounts), but it works.
689 */
690 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
691}
692
693static void acm_tty_throttle(struct tty_struct *tty)
694{
695 struct acm *acm = tty->driver_data;
696
697 spin_lock_irq(&acm->read_lock);
698 acm->throttle_req = 1;
699 spin_unlock_irq(&acm->read_lock);
700}
701
702static void acm_tty_unthrottle(struct tty_struct *tty)
703{
704 struct acm *acm = tty->driver_data;
705 unsigned int was_throttled;
706
707 spin_lock_irq(&acm->read_lock);
708 was_throttled = acm->throttled;
709 acm->throttled = 0;
710 acm->throttle_req = 0;
711 spin_unlock_irq(&acm->read_lock);
712
713 if (was_throttled)
714 acm_submit_read_urbs(acm, GFP_KERNEL);
715}
716
717static int acm_tty_break_ctl(struct tty_struct *tty, int state)
718{
719 struct acm *acm = tty->driver_data;
720 int retval;
721
722 retval = acm_send_break(acm, state ? 0xffff : 0);
723 if (retval < 0)
724 dev_dbg(&acm->control->dev, "%s - send break failed\n",
725 __func__);
726 return retval;
727}
728
729static int acm_tty_tiocmget(struct tty_struct *tty)
730{
731 struct acm *acm = tty->driver_data;
732
733 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
734 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
735 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
736 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
737 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
738 TIOCM_CTS;
739}
740
741static int acm_tty_tiocmset(struct tty_struct *tty,
742 unsigned int set, unsigned int clear)
743{
744 struct acm *acm = tty->driver_data;
745 unsigned int newctrl;
746
747 newctrl = acm->ctrlout;
748 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
749 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
750 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
751 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
752
753 newctrl = (newctrl & ~clear) | set;
754
755 if (acm->ctrlout == newctrl)
756 return 0;
757 return acm_set_control(acm, acm->ctrlout = newctrl);
758}
759
760static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
761{
762 struct serial_struct tmp;
763
764 if (!info)
765 return -EINVAL;
766
767 memset(&tmp, 0, sizeof(tmp));
768 tmp.flags = ASYNC_LOW_LATENCY;
769 tmp.xmit_fifo_size = acm->writesize;
770 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
771 tmp.close_delay = acm->port.close_delay / 10;
772 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
773 ASYNC_CLOSING_WAIT_NONE :
774 acm->port.closing_wait / 10;
775
776 if (copy_to_user(info, &tmp, sizeof(tmp)))
777 return -EFAULT;
778 else
779 return 0;
780}
781
782static int set_serial_info(struct acm *acm,
783 struct serial_struct __user *newinfo)
784{
785 struct serial_struct new_serial;
786 unsigned int closing_wait, close_delay;
787 int retval = 0;
788
789 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
790 return -EFAULT;
791
792 close_delay = new_serial.close_delay * 10;
793 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
794 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
795
796 mutex_lock(&acm->port.mutex);
797
798 if (!capable(CAP_SYS_ADMIN)) {
799 if ((close_delay != acm->port.close_delay) ||
800 (closing_wait != acm->port.closing_wait))
801 retval = -EPERM;
802 else
803 retval = -EOPNOTSUPP;
804 } else {
805 acm->port.close_delay = close_delay;
806 acm->port.closing_wait = closing_wait;
807 }
808
809 mutex_unlock(&acm->port.mutex);
810 return retval;
811}
812
813static int wait_serial_change(struct acm *acm, unsigned long arg)
814{
815 int rv = 0;
816 DECLARE_WAITQUEUE(wait, current);
817 struct async_icount old, new;
818
819 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
820 return -EINVAL;
821 do {
822 spin_lock_irq(&acm->read_lock);
823 old = acm->oldcount;
824 new = acm->iocount;
825 acm->oldcount = new;
826 spin_unlock_irq(&acm->read_lock);
827
828 if ((arg & TIOCM_DSR) &&
829 old.dsr != new.dsr)
830 break;
831 if ((arg & TIOCM_CD) &&
832 old.dcd != new.dcd)
833 break;
834 if ((arg & TIOCM_RI) &&
835 old.rng != new.rng)
836 break;
837
838 add_wait_queue(&acm->wioctl, &wait);
839 set_current_state(TASK_INTERRUPTIBLE);
840 schedule();
841 remove_wait_queue(&acm->wioctl, &wait);
842 if (acm->disconnected) {
843 if (arg & TIOCM_CD)
844 break;
845 else
846 rv = -ENODEV;
847 } else {
848 if (signal_pending(current))
849 rv = -ERESTARTSYS;
850 }
851 } while (!rv);
852
853
854
855 return rv;
856}
857
858static int get_serial_usage(struct acm *acm,
859 struct serial_icounter_struct __user *count)
860{
861 struct serial_icounter_struct icount;
862 int rv = 0;
863
864 memset(&icount, 0, sizeof(icount));
865 icount.dsr = acm->iocount.dsr;
866 icount.rng = acm->iocount.rng;
867 icount.dcd = acm->iocount.dcd;
868 icount.frame = acm->iocount.frame;
869 icount.overrun = acm->iocount.overrun;
870 icount.parity = acm->iocount.parity;
871 icount.brk = acm->iocount.brk;
872
873 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
874 rv = -EFAULT;
875
876 return rv;
877}
878
879static int acm_tty_ioctl(struct tty_struct *tty,
880 unsigned int cmd, unsigned long arg)
881{
882 struct acm *acm = tty->driver_data;
883 int rv = -ENOIOCTLCMD;
884
885 switch (cmd) {
886 case TIOCGSERIAL: /* gets serial port data */
887 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
888 break;
889 case TIOCSSERIAL:
890 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
891 break;
892 case TIOCMIWAIT:
893 rv = usb_autopm_get_interface(acm->control);
894 if (rv < 0) {
895 rv = -EIO;
896 break;
897 }
898 rv = wait_serial_change(acm, arg);
899 usb_autopm_put_interface(acm->control);
900 break;
901 case TIOCGICOUNT:
902 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
903 break;
904 }
905
906 return rv;
907}
908
909static void acm_tty_set_termios(struct tty_struct *tty,
910 struct ktermios *termios_old)
911{
912 struct acm *acm = tty->driver_data;
913 struct ktermios *termios = &tty->termios;
914 struct usb_cdc_line_coding newline;
915 int newctrl = acm->ctrlout;
916
917 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
918 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
919 newline.bParityType = termios->c_cflag & PARENB ?
920 (termios->c_cflag & PARODD ? 1 : 2) +
921 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
922 switch (termios->c_cflag & CSIZE) {
923 case CS5:
924 newline.bDataBits = 5;
925 break;
926 case CS6:
927 newline.bDataBits = 6;
928 break;
929 case CS7:
930 newline.bDataBits = 7;
931 break;
932 case CS8:
933 default:
934 newline.bDataBits = 8;
935 break;
936 }
937 /* FIXME: Needs to clear unsupported bits in the termios */
938 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
939
940 if (!newline.dwDTERate) {
941 newline.dwDTERate = acm->line.dwDTERate;
942 newctrl &= ~ACM_CTRL_DTR;
943 } else
944 newctrl |= ACM_CTRL_DTR;
945
946 if (newctrl != acm->ctrlout)
947 acm_set_control(acm, acm->ctrlout = newctrl);
948
949 if (memcmp(&acm->line, &newline, sizeof newline)) {
950 memcpy(&acm->line, &newline, sizeof newline);
951 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
952 __func__,
953 le32_to_cpu(newline.dwDTERate),
954 newline.bCharFormat, newline.bParityType,
955 newline.bDataBits);
956 acm_set_line(acm, &acm->line);
957 }
958}
959
960static const struct tty_port_operations acm_port_ops = {
961 .shutdown = acm_port_shutdown,
962 .activate = acm_port_activate,
963 .destruct = acm_port_destruct,
964};
965
966/*
967 * USB probe and disconnect routines.
968 */
969
970/* Little helpers: write/read buffers free */
971static void acm_write_buffers_free(struct acm *acm)
972{
973 int i;
974 struct acm_wb *wb;
975 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
976
977 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
978 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
979}
980
981static void acm_read_buffers_free(struct acm *acm)
982{
983 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
984 int i;
985
986 for (i = 0; i < acm->rx_buflimit; i++)
987 usb_free_coherent(usb_dev, acm->readsize,
988 acm->read_buffers[i].base, acm->read_buffers[i].dma);
989}
990
991/* Little helper: write buffers allocate */
992static int acm_write_buffers_alloc(struct acm *acm)
993{
994 int i;
995 struct acm_wb *wb;
996
997 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
998 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
999 &wb->dmah);
1000 if (!wb->buf) {
1001 while (i != 0) {
1002 --i;
1003 --wb;
1004 usb_free_coherent(acm->dev, acm->writesize,
1005 wb->buf, wb->dmah);
1006 }
1007 return -ENOMEM;
1008 }
1009 }
1010 return 0;
1011}
1012
1013static int acm_probe(struct usb_interface *intf,
1014 const struct usb_device_id *id)
1015{
1016 struct usb_cdc_union_desc *union_header = NULL;
1017 struct usb_cdc_country_functional_desc *cfd = NULL;
1018 unsigned char *buffer = intf->altsetting->extra;
1019 int buflen = intf->altsetting->extralen;
1020 struct usb_interface *control_interface;
1021 struct usb_interface *data_interface;
1022 struct usb_endpoint_descriptor *epctrl = NULL;
1023 struct usb_endpoint_descriptor *epread = NULL;
1024 struct usb_endpoint_descriptor *epwrite = NULL;
1025 struct usb_device *usb_dev = interface_to_usbdev(intf);
1026 struct acm *acm;
1027 int minor;
1028 int ctrlsize, readsize;
1029 u8 *buf;
1030 u8 ac_management_function = 0;
1031 u8 call_management_function = 0;
1032 int call_interface_num = -1;
1033 int data_interface_num = -1;
1034 unsigned long quirks;
1035 int num_rx_buf;
1036 int i;
1037 int combined_interfaces = 0;
1038 struct device *tty_dev;
1039 int rv = -ENOMEM;
1040
1041 /* normal quirks */
1042 quirks = (unsigned long)id->driver_info;
1043
1044 if (quirks == IGNORE_DEVICE)
1045 return -ENODEV;
1046
1047 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1048
1049 /* handle quirks deadly to normal probing*/
1050 if (quirks == NO_UNION_NORMAL) {
1051 data_interface = usb_ifnum_to_if(usb_dev, 1);
1052 control_interface = usb_ifnum_to_if(usb_dev, 0);
1053 goto skip_normal_probe;
1054 }
1055
1056 /* normal probing*/
1057 if (!buffer) {
1058 dev_err(&intf->dev, "Weird descriptor references\n");
1059 return -EINVAL;
1060 }
1061
1062 if (!buflen) {
1063 if (intf->cur_altsetting->endpoint &&
1064 intf->cur_altsetting->endpoint->extralen &&
1065 intf->cur_altsetting->endpoint->extra) {
1066 dev_dbg(&intf->dev,
1067 "Seeking extra descriptors on endpoint\n");
1068 buflen = intf->cur_altsetting->endpoint->extralen;
1069 buffer = intf->cur_altsetting->endpoint->extra;
1070 } else {
1071 dev_err(&intf->dev,
1072 "Zero length descriptor references\n");
1073 return -EINVAL;
1074 }
1075 }
1076
1077 while (buflen > 0) {
1078 if (buffer[1] != USB_DT_CS_INTERFACE) {
1079 dev_err(&intf->dev, "skipping garbage\n");
1080 goto next_desc;
1081 }
1082
1083 switch (buffer[2]) {
1084 case USB_CDC_UNION_TYPE: /* we've found it */
1085 if (union_header) {
1086 dev_err(&intf->dev, "More than one "
1087 "union descriptor, skipping ...\n");
1088 goto next_desc;
1089 }
1090 union_header = (struct usb_cdc_union_desc *)buffer;
1091 break;
1092 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1093 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1094 break;
1095 case USB_CDC_HEADER_TYPE: /* maybe check version */
1096 break; /* for now we ignore it */
1097 case USB_CDC_ACM_TYPE:
1098 ac_management_function = buffer[3];
1099 break;
1100 case USB_CDC_CALL_MANAGEMENT_TYPE:
1101 call_management_function = buffer[3];
1102 call_interface_num = buffer[4];
1103 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1104 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1105 break;
1106 default:
1107 /* there are LOTS more CDC descriptors that
1108 * could legitimately be found here.
1109 */
1110 dev_dbg(&intf->dev, "Ignoring descriptor: "
1111 "type %02x, length %d\n",
1112 buffer[2], buffer[0]);
1113 break;
1114 }
1115next_desc:
1116 buflen -= buffer[0];
1117 buffer += buffer[0];
1118 }
1119
1120 if (!union_header) {
1121 if (call_interface_num > 0) {
1122 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1123 /* quirks for Droids MuIn LCD */
1124 if (quirks & NO_DATA_INTERFACE)
1125 data_interface = usb_ifnum_to_if(usb_dev, 0);
1126 else
1127 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1128 control_interface = intf;
1129 } else {
1130 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1131 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1132 return -ENODEV;
1133 } else {
1134 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1135 combined_interfaces = 1;
1136 control_interface = data_interface = intf;
1137 goto look_for_collapsed_interface;
1138 }
1139 }
1140 } else {
1141 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1142 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1143 if (!control_interface || !data_interface) {
1144 dev_dbg(&intf->dev, "no interfaces\n");
1145 return -ENODEV;
1146 }
1147 }
1148
1149 if (data_interface_num != call_interface_num)
1150 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1151
1152 if (control_interface == data_interface) {
1153 /* some broken devices designed for windows work this way */
1154 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1155 combined_interfaces = 1;
1156 /* a popular other OS doesn't use it */
1157 quirks |= NO_CAP_LINE;
1158 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1159 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1160 return -EINVAL;
1161 }
1162look_for_collapsed_interface:
1163 for (i = 0; i < 3; i++) {
1164 struct usb_endpoint_descriptor *ep;
1165 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1166
1167 if (usb_endpoint_is_int_in(ep))
1168 epctrl = ep;
1169 else if (usb_endpoint_is_bulk_out(ep))
1170 epwrite = ep;
1171 else if (usb_endpoint_is_bulk_in(ep))
1172 epread = ep;
1173 else
1174 return -EINVAL;
1175 }
1176 if (!epctrl || !epread || !epwrite)
1177 return -ENODEV;
1178 else
1179 goto made_compressed_probe;
1180 }
1181
1182skip_normal_probe:
1183
1184 /*workaround for switched interfaces */
1185 if (data_interface->cur_altsetting->desc.bInterfaceClass
1186 != CDC_DATA_INTERFACE_TYPE) {
1187 if (control_interface->cur_altsetting->desc.bInterfaceClass
1188 == CDC_DATA_INTERFACE_TYPE) {
1189 struct usb_interface *t;
1190 dev_dbg(&intf->dev,
1191 "Your device has switched interfaces.\n");
1192 t = control_interface;
1193 control_interface = data_interface;
1194 data_interface = t;
1195 } else {
1196 return -EINVAL;
1197 }
1198 }
1199
1200 /* Accept probe requests only for the control interface */
1201 if (!combined_interfaces && intf != control_interface)
1202 return -ENODEV;
1203
1204 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1205 /* valid in this context */
1206 dev_dbg(&intf->dev, "The data interface isn't available\n");
1207 return -EBUSY;
1208 }
1209
1210
1211 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1212 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1213 return -EINVAL;
1214
1215 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1216 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1217 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1218
1219
1220 /* workaround for switched endpoints */
1221 if (!usb_endpoint_dir_in(epread)) {
1222 /* descriptors are swapped */
1223 struct usb_endpoint_descriptor *t;
1224 dev_dbg(&intf->dev,
1225 "The data interface has switched endpoints\n");
1226 t = epread;
1227 epread = epwrite;
1228 epwrite = t;
1229 }
1230made_compressed_probe:
1231 dev_dbg(&intf->dev, "interfaces are valid\n");
1232
1233 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1234 if (acm == NULL) {
1235 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1236 goto alloc_fail;
1237 }
1238
1239 minor = acm_alloc_minor(acm);
1240 if (minor == ACM_TTY_MINORS) {
1241 dev_err(&intf->dev, "no more free acm devices\n");
1242 kfree(acm);
1243 return -ENODEV;
1244 }
1245
1246 ctrlsize = usb_endpoint_maxp(epctrl);
1247 readsize = usb_endpoint_maxp(epread) *
1248 (quirks == SINGLE_RX_URB ? 1 : 2);
1249 acm->combined_interfaces = combined_interfaces;
1250 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1251 acm->control = control_interface;
1252 acm->data = data_interface;
1253 acm->minor = minor;
1254 acm->dev = usb_dev;
1255 acm->ctrl_caps = ac_management_function;
1256 if (quirks & NO_CAP_LINE)
1257 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1258 acm->ctrlsize = ctrlsize;
1259 acm->readsize = readsize;
1260 acm->rx_buflimit = num_rx_buf;
1261 INIT_WORK(&acm->work, acm_softint);
1262 init_waitqueue_head(&acm->wioctl);
1263 spin_lock_init(&acm->write_lock);
1264 spin_lock_init(&acm->read_lock);
1265 mutex_init(&acm->mutex);
1266 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1267 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1268 if (acm->is_int_ep)
1269 acm->bInterval = epread->bInterval;
1270 tty_port_init(&acm->port);
1271 acm->port.ops = &acm_port_ops;
1272
1273 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1274 if (!buf) {
1275 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1276 goto alloc_fail2;
1277 }
1278 acm->ctrl_buffer = buf;
1279
1280 if (acm_write_buffers_alloc(acm) < 0) {
1281 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1282 goto alloc_fail4;
1283 }
1284
1285 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1286 if (!acm->ctrlurb) {
1287 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1288 goto alloc_fail5;
1289 }
1290 for (i = 0; i < num_rx_buf; i++) {
1291 struct acm_rb *rb = &(acm->read_buffers[i]);
1292 struct urb *urb;
1293
1294 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1295 &rb->dma);
1296 if (!rb->base) {
1297 dev_err(&intf->dev, "out of memory "
1298 "(read bufs usb_alloc_coherent)\n");
1299 goto alloc_fail6;
1300 }
1301 rb->index = i;
1302 rb->instance = acm;
1303
1304 urb = usb_alloc_urb(0, GFP_KERNEL);
1305 if (!urb) {
1306 dev_err(&intf->dev,
1307 "out of memory (read urbs usb_alloc_urb)\n");
1308 goto alloc_fail6;
1309 }
1310 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1311 urb->transfer_dma = rb->dma;
1312 if (acm->is_int_ep) {
1313 usb_fill_int_urb(urb, acm->dev,
1314 acm->rx_endpoint,
1315 rb->base,
1316 acm->readsize,
1317 acm_read_bulk_callback, rb,
1318 acm->bInterval);
1319 } else {
1320 usb_fill_bulk_urb(urb, acm->dev,
1321 acm->rx_endpoint,
1322 rb->base,
1323 acm->readsize,
1324 acm_read_bulk_callback, rb);
1325 }
1326
1327 acm->read_urbs[i] = urb;
1328 __set_bit(i, &acm->read_urbs_free);
1329 }
1330 for (i = 0; i < ACM_NW; i++) {
1331 struct acm_wb *snd = &(acm->wb[i]);
1332
1333 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1334 if (snd->urb == NULL) {
1335 dev_err(&intf->dev,
1336 "out of memory (write urbs usb_alloc_urb)\n");
1337 goto alloc_fail7;
1338 }
1339
1340 if (usb_endpoint_xfer_int(epwrite))
1341 usb_fill_int_urb(snd->urb, usb_dev,
1342 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1343 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1344 else
1345 usb_fill_bulk_urb(snd->urb, usb_dev,
1346 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1347 NULL, acm->writesize, acm_write_bulk, snd);
1348 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1349 snd->instance = acm;
1350 }
1351
1352 usb_set_intfdata(intf, acm);
1353
1354 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1355 if (i < 0)
1356 goto alloc_fail7;
1357
1358 if (cfd) { /* export the country data */
1359 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1360 if (!acm->country_codes)
1361 goto skip_countries;
1362 acm->country_code_size = cfd->bLength - 4;
1363 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1364 cfd->bLength - 4);
1365 acm->country_rel_date = cfd->iCountryCodeRelDate;
1366
1367 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1368 if (i < 0) {
1369 kfree(acm->country_codes);
1370 acm->country_codes = NULL;
1371 acm->country_code_size = 0;
1372 goto skip_countries;
1373 }
1374
1375 i = device_create_file(&intf->dev,
1376 &dev_attr_iCountryCodeRelDate);
1377 if (i < 0) {
1378 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1379 kfree(acm->country_codes);
1380 acm->country_codes = NULL;
1381 acm->country_code_size = 0;
1382 goto skip_countries;
1383 }
1384 }
1385
1386skip_countries:
1387 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1388 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1389 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1390 /* works around buggy devices */
1391 epctrl->bInterval ? epctrl->bInterval : 16);
1392 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1393 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1394
1395 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1396
1397 acm_set_control(acm, acm->ctrlout);
1398
1399 acm->line.dwDTERate = cpu_to_le32(9600);
1400 acm->line.bDataBits = 8;
1401 acm_set_line(acm, &acm->line);
1402
1403 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1404 usb_set_intfdata(data_interface, acm);
1405
1406 usb_get_intf(control_interface);
1407 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1408 &control_interface->dev);
1409 if (IS_ERR(tty_dev)) {
1410 rv = PTR_ERR(tty_dev);
1411 goto alloc_fail8;
1412 }
1413
1414 return 0;
1415alloc_fail8:
1416 if (acm->country_codes) {
1417 device_remove_file(&acm->control->dev,
1418 &dev_attr_wCountryCodes);
1419 device_remove_file(&acm->control->dev,
1420 &dev_attr_iCountryCodeRelDate);
1421 }
1422 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1423alloc_fail7:
1424 usb_set_intfdata(intf, NULL);
1425 for (i = 0; i < ACM_NW; i++)
1426 usb_free_urb(acm->wb[i].urb);
1427alloc_fail6:
1428 for (i = 0; i < num_rx_buf; i++)
1429 usb_free_urb(acm->read_urbs[i]);
1430 acm_read_buffers_free(acm);
1431 usb_free_urb(acm->ctrlurb);
1432alloc_fail5:
1433 acm_write_buffers_free(acm);
1434alloc_fail4:
1435 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1436alloc_fail2:
1437 acm_release_minor(acm);
1438 kfree(acm);
1439alloc_fail:
1440 return rv;
1441}
1442
1443static void stop_data_traffic(struct acm *acm)
1444{
1445 int i;
1446
1447 dev_dbg(&acm->control->dev, "%s\n", __func__);
1448
1449 usb_kill_urb(acm->ctrlurb);
1450 for (i = 0; i < ACM_NW; i++)
1451 usb_kill_urb(acm->wb[i].urb);
1452 for (i = 0; i < acm->rx_buflimit; i++)
1453 usb_kill_urb(acm->read_urbs[i]);
1454
1455 cancel_work_sync(&acm->work);
1456}
1457
1458static void acm_disconnect(struct usb_interface *intf)
1459{
1460 struct acm *acm = usb_get_intfdata(intf);
1461 struct usb_device *usb_dev = interface_to_usbdev(intf);
1462 struct tty_struct *tty;
1463 int i;
1464
1465 dev_dbg(&intf->dev, "%s\n", __func__);
1466
1467 /* sibling interface is already cleaning up */
1468 if (!acm)
1469 return;
1470
1471 mutex_lock(&acm->mutex);
1472 acm->disconnected = true;
1473 if (acm->country_codes) {
1474 device_remove_file(&acm->control->dev,
1475 &dev_attr_wCountryCodes);
1476 device_remove_file(&acm->control->dev,
1477 &dev_attr_iCountryCodeRelDate);
1478 }
1479 wake_up_all(&acm->wioctl);
1480 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1481 usb_set_intfdata(acm->control, NULL);
1482 usb_set_intfdata(acm->data, NULL);
1483 mutex_unlock(&acm->mutex);
1484
1485 tty = tty_port_tty_get(&acm->port);
1486 if (tty) {
1487 tty_vhangup(tty);
1488 tty_kref_put(tty);
1489 }
1490
1491 stop_data_traffic(acm);
1492
1493 tty_unregister_device(acm_tty_driver, acm->minor);
1494
1495 usb_free_urb(acm->ctrlurb);
1496 for (i = 0; i < ACM_NW; i++)
1497 usb_free_urb(acm->wb[i].urb);
1498 for (i = 0; i < acm->rx_buflimit; i++)
1499 usb_free_urb(acm->read_urbs[i]);
1500 acm_write_buffers_free(acm);
1501 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1502 acm_read_buffers_free(acm);
1503
1504 if (!acm->combined_interfaces)
1505 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1506 acm->data : acm->control);
1507
1508 tty_port_put(&acm->port);
1509}
1510
1511#ifdef CONFIG_PM
1512static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1513{
1514 struct acm *acm = usb_get_intfdata(intf);
1515 int cnt;
1516
1517 if (PMSG_IS_AUTO(message)) {
1518 int b;
1519
1520 spin_lock_irq(&acm->write_lock);
1521 b = acm->transmitting;
1522 spin_unlock_irq(&acm->write_lock);
1523 if (b)
1524 return -EBUSY;
1525 }
1526
1527 spin_lock_irq(&acm->read_lock);
1528 spin_lock(&acm->write_lock);
1529 cnt = acm->susp_count++;
1530 spin_unlock(&acm->write_lock);
1531 spin_unlock_irq(&acm->read_lock);
1532
1533 if (cnt)
1534 return 0;
1535
1536 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1537 stop_data_traffic(acm);
1538
1539 return 0;
1540}
1541
1542static int acm_resume(struct usb_interface *intf)
1543{
1544 struct acm *acm = usb_get_intfdata(intf);
1545 struct acm_wb *wb;
1546 int rv = 0;
1547 int cnt;
1548
1549 spin_lock_irq(&acm->read_lock);
1550 acm->susp_count -= 1;
1551 cnt = acm->susp_count;
1552 spin_unlock_irq(&acm->read_lock);
1553
1554 if (cnt)
1555 return 0;
1556
1557 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1558 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
1559
1560 spin_lock_irq(&acm->write_lock);
1561 if (acm->delayed_wb) {
1562 wb = acm->delayed_wb;
1563 acm->delayed_wb = NULL;
1564 spin_unlock_irq(&acm->write_lock);
1565 acm_start_wb(acm, wb);
1566 } else {
1567 spin_unlock_irq(&acm->write_lock);
1568 }
1569
1570 /*
1571 * delayed error checking because we must
1572 * do the write path at all cost
1573 */
1574 if (rv < 0)
1575 goto err_out;
1576
1577 rv = acm_submit_read_urbs(acm, GFP_NOIO);
1578 }
1579
1580err_out:
1581 return rv;
1582}
1583
1584static int acm_reset_resume(struct usb_interface *intf)
1585{
1586 struct acm *acm = usb_get_intfdata(intf);
1587
1588 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1589 tty_port_tty_hangup(&acm->port, false);
1590
1591 return acm_resume(intf);
1592}
1593
1594#endif /* CONFIG_PM */
1595
1596#define NOKIA_PCSUITE_ACM_INFO(x) \
1597 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1598 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1599 USB_CDC_ACM_PROTO_VENDOR)
1600
1601#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1602 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1603 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1604 USB_CDC_ACM_PROTO_VENDOR)
1605
1606/*
1607 * USB driver structure.
1608 */
1609
1610static const struct usb_device_id acm_ids[] = {
1611 /* quirky and broken devices */
1612 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1613 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1614 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1615 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1616 },
1617 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1618 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1619 },
1620 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1621 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1622 },
1623 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1624 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1625 },
1626 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1627 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1628 },
1629 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1630 .driver_info = SINGLE_RX_URB,
1631 },
1632 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1633 .driver_info = SINGLE_RX_URB, /* firmware bug */
1634 },
1635 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1636 .driver_info = SINGLE_RX_URB, /* firmware bug */
1637 },
1638 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1639 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1640 },
1641 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1642 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1643 },
1644 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1645 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1646 },
1647 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1648 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1649 },
1650 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1651 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1652 },
1653 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1654 },
1655 /* Motorola H24 HSPA module: */
1656 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1657 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1658 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1659 },
1660 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1661 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1662 },
1663 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1664 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1665 },
1666 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1667 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1668 },
1669 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1670 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1671 },
1672 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1673 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1674 },
1675 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1676 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1677 },
1678
1679 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1680 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1681 data interface instead of
1682 communications interface.
1683 Maybe we should define a new
1684 quirk for this. */
1685 },
1686 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1687 .driver_info = NO_UNION_NORMAL,
1688 },
1689 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1690 .driver_info = NO_UNION_NORMAL,
1691 },
1692 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1693 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1694 },
1695 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1696 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1697 },
1698
1699 /* Nokia S60 phones expose two ACM channels. The first is
1700 * a modem and is picked up by the standard AT-command
1701 * information below. The second is 'vendor-specific' but
1702 * is treated as a serial device at the S60 end, so we want
1703 * to expose it on Linux too. */
1704 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1705 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1706 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1707 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1708 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1709 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1710 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1711 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1712 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1713 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1714 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1715 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1716 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1717 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1718 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1719 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1720 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1721 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1722 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1723 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1724 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1725 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1726 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1727 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1728 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1729 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1733 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1735 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1736 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1737 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1739 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1740 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1741 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1743 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1744 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1746 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1747 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1750 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1751 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1753 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1754 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1755 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1756 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1757 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1761 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1762
1763 /* Support for Owen devices */
1764 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1765
1766 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1767
1768 /* Support Lego NXT using pbLua firmware */
1769 { USB_DEVICE(0x0694, 0xff00),
1770 .driver_info = NOT_A_MODEM,
1771 },
1772
1773 /* Support for Droids MuIn LCD */
1774 { USB_DEVICE(0x04d8, 0x000b),
1775 .driver_info = NO_DATA_INTERFACE,
1776 },
1777
1778#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1779 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1780 .driver_info = IGNORE_DEVICE,
1781 },
1782 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1783 .driver_info = IGNORE_DEVICE,
1784 },
1785#endif
1786
1787 /* control interfaces without any protocol set */
1788 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1789 USB_CDC_PROTO_NONE) },
1790
1791 /* control interfaces with various AT-command sets */
1792 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1793 USB_CDC_ACM_PROTO_AT_V25TER) },
1794 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1795 USB_CDC_ACM_PROTO_AT_PCCA101) },
1796 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1797 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1798 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1799 USB_CDC_ACM_PROTO_AT_GSM) },
1800 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1801 USB_CDC_ACM_PROTO_AT_3G) },
1802 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1803 USB_CDC_ACM_PROTO_AT_CDMA) },
1804
1805 { }
1806};
1807
1808MODULE_DEVICE_TABLE(usb, acm_ids);
1809
1810static struct usb_driver acm_driver = {
1811 .name = "cdc_acm",
1812 .probe = acm_probe,
1813 .disconnect = acm_disconnect,
1814#ifdef CONFIG_PM
1815 .suspend = acm_suspend,
1816 .resume = acm_resume,
1817 .reset_resume = acm_reset_resume,
1818#endif
1819 .id_table = acm_ids,
1820#ifdef CONFIG_PM
1821 .supports_autosuspend = 1,
1822#endif
1823 .disable_hub_initiated_lpm = 1,
1824};
1825
1826/*
1827 * TTY driver structures.
1828 */
1829
1830static const struct tty_operations acm_ops = {
1831 .install = acm_tty_install,
1832 .open = acm_tty_open,
1833 .close = acm_tty_close,
1834 .cleanup = acm_tty_cleanup,
1835 .hangup = acm_tty_hangup,
1836 .write = acm_tty_write,
1837 .write_room = acm_tty_write_room,
1838 .ioctl = acm_tty_ioctl,
1839 .throttle = acm_tty_throttle,
1840 .unthrottle = acm_tty_unthrottle,
1841 .chars_in_buffer = acm_tty_chars_in_buffer,
1842 .break_ctl = acm_tty_break_ctl,
1843 .set_termios = acm_tty_set_termios,
1844 .tiocmget = acm_tty_tiocmget,
1845 .tiocmset = acm_tty_tiocmset,
1846};
1847
1848/*
1849 * Init / exit.
1850 */
1851
1852static int __init acm_init(void)
1853{
1854 int retval;
1855 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1856 if (!acm_tty_driver)
1857 return -ENOMEM;
1858 acm_tty_driver->driver_name = "acm",
1859 acm_tty_driver->name = "ttyACM",
1860 acm_tty_driver->major = ACM_TTY_MAJOR,
1861 acm_tty_driver->minor_start = 0,
1862 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1863 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1864 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1865 acm_tty_driver->init_termios = tty_std_termios;
1866 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1867 HUPCL | CLOCAL;
1868 tty_set_operations(acm_tty_driver, &acm_ops);
1869
1870 retval = tty_register_driver(acm_tty_driver);
1871 if (retval) {
1872 put_tty_driver(acm_tty_driver);
1873 return retval;
1874 }
1875
1876 retval = usb_register(&acm_driver);
1877 if (retval) {
1878 tty_unregister_driver(acm_tty_driver);
1879 put_tty_driver(acm_tty_driver);
1880 return retval;
1881 }
1882
1883 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1884
1885 return 0;
1886}
1887
1888static void __exit acm_exit(void)
1889{
1890 usb_deregister(&acm_driver);
1891 tty_unregister_driver(acm_tty_driver);
1892 put_tty_driver(acm_tty_driver);
1893}
1894
1895module_init(acm_init);
1896module_exit(acm_exit);
1897
1898MODULE_AUTHOR(DRIVER_AUTHOR);
1899MODULE_DESCRIPTION(DRIVER_DESC);
1900MODULE_LICENSE("GPL");
1901MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * cdc-acm.c
4 *
5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
10 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
12 *
13 * USB Abstract Control Model driver for USB modems and ISDN adapters
14 *
15 * Sponsored by SuSE
16 */
17
18#undef DEBUG
19#undef VERBOSE_DEBUG
20
21#include <linux/kernel.h>
22#include <linux/sched/signal.h>
23#include <linux/errno.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/log2.h>
27#include <linux/tty.h>
28#include <linux/serial.h>
29#include <linux/tty_driver.h>
30#include <linux/tty_flip.h>
31#include <linux/module.h>
32#include <linux/mutex.h>
33#include <linux/uaccess.h>
34#include <linux/usb.h>
35#include <linux/usb/cdc.h>
36#include <asm/byteorder.h>
37#include <asm/unaligned.h>
38#include <linux/idr.h>
39#include <linux/list.h>
40
41#include "cdc-acm.h"
42
43
44#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
45#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
46
47static struct usb_driver acm_driver;
48static struct tty_driver *acm_tty_driver;
49
50static DEFINE_IDR(acm_minors);
51static DEFINE_MUTEX(acm_minors_lock);
52
53static void acm_tty_set_termios(struct tty_struct *tty,
54 struct ktermios *termios_old);
55
56/*
57 * acm_minors accessors
58 */
59
60/*
61 * Look up an ACM structure by minor. If found and not disconnected, increment
62 * its refcount and return it with its mutex held.
63 */
64static struct acm *acm_get_by_minor(unsigned int minor)
65{
66 struct acm *acm;
67
68 mutex_lock(&acm_minors_lock);
69 acm = idr_find(&acm_minors, minor);
70 if (acm) {
71 mutex_lock(&acm->mutex);
72 if (acm->disconnected) {
73 mutex_unlock(&acm->mutex);
74 acm = NULL;
75 } else {
76 tty_port_get(&acm->port);
77 mutex_unlock(&acm->mutex);
78 }
79 }
80 mutex_unlock(&acm_minors_lock);
81 return acm;
82}
83
84/*
85 * Try to find an available minor number and if found, associate it with 'acm'.
86 */
87static int acm_alloc_minor(struct acm *acm)
88{
89 int minor;
90
91 mutex_lock(&acm_minors_lock);
92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
93 mutex_unlock(&acm_minors_lock);
94
95 return minor;
96}
97
98/* Release the minor number associated with 'acm'. */
99static void acm_release_minor(struct acm *acm)
100{
101 mutex_lock(&acm_minors_lock);
102 idr_remove(&acm_minors, acm->minor);
103 mutex_unlock(&acm_minors_lock);
104}
105
106/*
107 * Functions for ACM control messages.
108 */
109
110static int acm_ctrl_msg(struct acm *acm, int request, int value,
111 void *buf, int len)
112{
113 int retval;
114
115 retval = usb_autopm_get_interface(acm->control);
116 if (retval)
117 return retval;
118
119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
120 request, USB_RT_ACM, value,
121 acm->control->altsetting[0].desc.bInterfaceNumber,
122 buf, len, 5000);
123
124 dev_dbg(&acm->control->dev,
125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
126 __func__, request, value, len, retval);
127
128 usb_autopm_put_interface(acm->control);
129
130 return retval < 0 ? retval : 0;
131}
132
133/* devices aren't required to support these requests.
134 * the cdc acm descriptor tells whether they do...
135 */
136static inline int acm_set_control(struct acm *acm, int control)
137{
138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
139 return -EOPNOTSUPP;
140
141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
142 control, NULL, 0);
143}
144
145#define acm_set_line(acm, line) \
146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
147#define acm_send_break(acm, ms) \
148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
149
150static void acm_kill_urbs(struct acm *acm)
151{
152 int i;
153
154 usb_kill_urb(acm->ctrlurb);
155 for (i = 0; i < ACM_NW; i++)
156 usb_kill_urb(acm->wb[i].urb);
157 for (i = 0; i < acm->rx_buflimit; i++)
158 usb_kill_urb(acm->read_urbs[i]);
159}
160
161/*
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
166static int acm_wb_alloc(struct acm *acm)
167{
168 int i, wbn;
169 struct acm_wb *wb;
170
171 wbn = 0;
172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 wb->len = 0;
178 return wbn;
179 }
180 wbn = (wbn + 1) % ACM_NW;
181 if (++i >= ACM_NW)
182 return -1;
183 }
184}
185
186static int acm_wb_is_avail(struct acm *acm)
187{
188 int i, n;
189 unsigned long flags;
190
191 n = ACM_NW;
192 spin_lock_irqsave(&acm->write_lock, flags);
193 for (i = 0; i < ACM_NW; i++)
194 n -= acm->wb[i].use;
195 spin_unlock_irqrestore(&acm->write_lock, flags);
196 return n;
197}
198
199/*
200 * Finish write. Caller must hold acm->write_lock
201 */
202static void acm_write_done(struct acm *acm, struct acm_wb *wb)
203{
204 wb->use = 0;
205 acm->transmitting--;
206 usb_autopm_put_interface_async(acm->control);
207}
208
209/*
210 * Poke write.
211 *
212 * the caller is responsible for locking
213 */
214
215static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
216{
217 int rc;
218
219 acm->transmitting++;
220
221 wb->urb->transfer_buffer = wb->buf;
222 wb->urb->transfer_dma = wb->dmah;
223 wb->urb->transfer_buffer_length = wb->len;
224 wb->urb->dev = acm->dev;
225
226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
227 if (rc < 0) {
228 dev_err(&acm->data->dev,
229 "%s - usb_submit_urb(write bulk) failed: %d\n",
230 __func__, rc);
231 acm_write_done(acm, wb);
232 }
233 return rc;
234}
235
236/*
237 * attributes exported through sysfs
238 */
239static ssize_t bmCapabilities_show
240(struct device *dev, struct device_attribute *attr, char *buf)
241{
242 struct usb_interface *intf = to_usb_interface(dev);
243 struct acm *acm = usb_get_intfdata(intf);
244
245 return sprintf(buf, "%d", acm->ctrl_caps);
246}
247static DEVICE_ATTR_RO(bmCapabilities);
248
249static ssize_t wCountryCodes_show
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 memcpy(buf, acm->country_codes, acm->country_code_size);
256 return acm->country_code_size;
257}
258
259static DEVICE_ATTR_RO(wCountryCodes);
260
261static ssize_t iCountryCodeRelDate_show
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 return sprintf(buf, "%d", acm->country_rel_date);
268}
269
270static DEVICE_ATTR_RO(iCountryCodeRelDate);
271/*
272 * Interrupt handlers for various ACM device responses
273 */
274
275static void acm_process_notification(struct acm *acm, unsigned char *buf)
276{
277 int newctrl;
278 int difference;
279 unsigned long flags;
280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
281 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
282
283 switch (dr->bNotificationType) {
284 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
285 dev_dbg(&acm->control->dev,
286 "%s - network connection: %d\n", __func__, dr->wValue);
287 break;
288
289 case USB_CDC_NOTIFY_SERIAL_STATE:
290 if (le16_to_cpu(dr->wLength) != 2) {
291 dev_dbg(&acm->control->dev,
292 "%s - malformed serial state\n", __func__);
293 break;
294 }
295
296 newctrl = get_unaligned_le16(data);
297 dev_dbg(&acm->control->dev,
298 "%s - serial state: 0x%x\n", __func__, newctrl);
299
300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
301 dev_dbg(&acm->control->dev,
302 "%s - calling hangup\n", __func__);
303 tty_port_tty_hangup(&acm->port, false);
304 }
305
306 difference = acm->ctrlin ^ newctrl;
307 spin_lock_irqsave(&acm->read_lock, flags);
308 acm->ctrlin = newctrl;
309 acm->oldcount = acm->iocount;
310
311 if (difference & ACM_CTRL_DSR)
312 acm->iocount.dsr++;
313 if (difference & ACM_CTRL_DCD)
314 acm->iocount.dcd++;
315 if (newctrl & ACM_CTRL_BRK)
316 acm->iocount.brk++;
317 if (newctrl & ACM_CTRL_RI)
318 acm->iocount.rng++;
319 if (newctrl & ACM_CTRL_FRAMING)
320 acm->iocount.frame++;
321 if (newctrl & ACM_CTRL_PARITY)
322 acm->iocount.parity++;
323 if (newctrl & ACM_CTRL_OVERRUN)
324 acm->iocount.overrun++;
325 spin_unlock_irqrestore(&acm->read_lock, flags);
326
327 if (difference)
328 wake_up_all(&acm->wioctl);
329
330 break;
331
332 default:
333 dev_dbg(&acm->control->dev,
334 "%s - unknown notification %d received: index %d len %d\n",
335 __func__,
336 dr->bNotificationType, dr->wIndex, dr->wLength);
337 }
338}
339
340/* control interface reports status changes with "interrupt" transfers */
341static void acm_ctrl_irq(struct urb *urb)
342{
343 struct acm *acm = urb->context;
344 struct usb_cdc_notification *dr = urb->transfer_buffer;
345 unsigned int current_size = urb->actual_length;
346 unsigned int expected_size, copy_size, alloc_size;
347 int retval;
348 int status = urb->status;
349
350 switch (status) {
351 case 0:
352 /* success */
353 break;
354 case -ECONNRESET:
355 case -ENOENT:
356 case -ESHUTDOWN:
357 /* this urb is terminated, clean up */
358 dev_dbg(&acm->control->dev,
359 "%s - urb shutting down with status: %d\n",
360 __func__, status);
361 return;
362 default:
363 dev_dbg(&acm->control->dev,
364 "%s - nonzero urb status received: %d\n",
365 __func__, status);
366 goto exit;
367 }
368
369 usb_mark_last_busy(acm->dev);
370
371 if (acm->nb_index)
372 dr = (struct usb_cdc_notification *)acm->notification_buffer;
373
374 /* size = notification-header + (optional) data */
375 expected_size = sizeof(struct usb_cdc_notification) +
376 le16_to_cpu(dr->wLength);
377
378 if (current_size < expected_size) {
379 /* notification is transmitted fragmented, reassemble */
380 if (acm->nb_size < expected_size) {
381 if (acm->nb_size) {
382 kfree(acm->notification_buffer);
383 acm->nb_size = 0;
384 }
385 alloc_size = roundup_pow_of_two(expected_size);
386 /*
387 * kmalloc ensures a valid notification_buffer after a
388 * use of kfree in case the previous allocation was too
389 * small. Final freeing is done on disconnect.
390 */
391 acm->notification_buffer =
392 kmalloc(alloc_size, GFP_ATOMIC);
393 if (!acm->notification_buffer)
394 goto exit;
395 acm->nb_size = alloc_size;
396 }
397
398 copy_size = min(current_size,
399 expected_size - acm->nb_index);
400
401 memcpy(&acm->notification_buffer[acm->nb_index],
402 urb->transfer_buffer, copy_size);
403 acm->nb_index += copy_size;
404 current_size = acm->nb_index;
405 }
406
407 if (current_size >= expected_size) {
408 /* notification complete */
409 acm_process_notification(acm, (unsigned char *)dr);
410 acm->nb_index = 0;
411 }
412
413exit:
414 retval = usb_submit_urb(urb, GFP_ATOMIC);
415 if (retval && retval != -EPERM)
416 dev_err(&acm->control->dev,
417 "%s - usb_submit_urb failed: %d\n", __func__, retval);
418}
419
420static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
421{
422 int res;
423
424 if (!test_and_clear_bit(index, &acm->read_urbs_free))
425 return 0;
426
427 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
428 if (res) {
429 if (res != -EPERM && res != -ENODEV) {
430 dev_err(&acm->data->dev,
431 "urb %d failed submission with %d\n",
432 index, res);
433 }
434 set_bit(index, &acm->read_urbs_free);
435 return res;
436 } else {
437 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
438 }
439
440 return 0;
441}
442
443static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
444{
445 int res;
446 int i;
447
448 for (i = 0; i < acm->rx_buflimit; ++i) {
449 res = acm_submit_read_urb(acm, i, mem_flags);
450 if (res)
451 return res;
452 }
453
454 return 0;
455}
456
457static void acm_process_read_urb(struct acm *acm, struct urb *urb)
458{
459 if (!urb->actual_length)
460 return;
461
462 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
463 urb->actual_length);
464 tty_flip_buffer_push(&acm->port);
465}
466
467static void acm_read_bulk_callback(struct urb *urb)
468{
469 struct acm_rb *rb = urb->context;
470 struct acm *acm = rb->instance;
471 int status = urb->status;
472 bool stopped = false;
473 bool stalled = false;
474
475 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
476 rb->index, urb->actual_length, status);
477
478 if (!acm->dev) {
479 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
480 return;
481 }
482
483 switch (status) {
484 case 0:
485 usb_mark_last_busy(acm->dev);
486 acm_process_read_urb(acm, urb);
487 break;
488 case -EPIPE:
489 set_bit(EVENT_RX_STALL, &acm->flags);
490 stalled = true;
491 break;
492 case -ENOENT:
493 case -ECONNRESET:
494 case -ESHUTDOWN:
495 dev_dbg(&acm->data->dev,
496 "%s - urb shutting down with status: %d\n",
497 __func__, status);
498 stopped = true;
499 break;
500 default:
501 dev_dbg(&acm->data->dev,
502 "%s - nonzero urb status received: %d\n",
503 __func__, status);
504 break;
505 }
506
507 /*
508 * Make sure URB processing is done before marking as free to avoid
509 * racing with unthrottle() on another CPU. Matches the barriers
510 * implied by the test_and_clear_bit() in acm_submit_read_urb().
511 */
512 smp_mb__before_atomic();
513 set_bit(rb->index, &acm->read_urbs_free);
514 /*
515 * Make sure URB is marked as free before checking the throttled flag
516 * to avoid racing with unthrottle() on another CPU. Matches the
517 * smp_mb() in unthrottle().
518 */
519 smp_mb__after_atomic();
520
521 if (stopped || stalled) {
522 if (stalled)
523 schedule_work(&acm->work);
524 return;
525 }
526
527 if (test_bit(ACM_THROTTLED, &acm->flags))
528 return;
529
530 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
531}
532
533/* data interface wrote those outgoing bytes */
534static void acm_write_bulk(struct urb *urb)
535{
536 struct acm_wb *wb = urb->context;
537 struct acm *acm = wb->instance;
538 unsigned long flags;
539 int status = urb->status;
540
541 if (status || (urb->actual_length != urb->transfer_buffer_length))
542 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
543 urb->actual_length,
544 urb->transfer_buffer_length,
545 status);
546
547 spin_lock_irqsave(&acm->write_lock, flags);
548 acm_write_done(acm, wb);
549 spin_unlock_irqrestore(&acm->write_lock, flags);
550 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
551 schedule_work(&acm->work);
552}
553
554static void acm_softint(struct work_struct *work)
555{
556 int i;
557 struct acm *acm = container_of(work, struct acm, work);
558
559 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
560 if (!(usb_autopm_get_interface(acm->data))) {
561 for (i = 0; i < acm->rx_buflimit; i++)
562 usb_kill_urb(acm->read_urbs[i]);
563 usb_clear_halt(acm->dev, acm->in);
564 acm_submit_read_urbs(acm, GFP_KERNEL);
565 usb_autopm_put_interface(acm->data);
566 }
567 clear_bit(EVENT_RX_STALL, &acm->flags);
568 }
569
570 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
571 tty_port_tty_wakeup(&acm->port);
572}
573
574/*
575 * TTY handlers
576 */
577
578static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
579{
580 struct acm *acm;
581 int retval;
582
583 acm = acm_get_by_minor(tty->index);
584 if (!acm)
585 return -ENODEV;
586
587 retval = tty_standard_install(driver, tty);
588 if (retval)
589 goto error_init_termios;
590
591 /*
592 * Suppress initial echoing for some devices which might send data
593 * immediately after acm driver has been installed.
594 */
595 if (acm->quirks & DISABLE_ECHO)
596 tty->termios.c_lflag &= ~ECHO;
597
598 tty->driver_data = acm;
599
600 return 0;
601
602error_init_termios:
603 tty_port_put(&acm->port);
604 return retval;
605}
606
607static int acm_tty_open(struct tty_struct *tty, struct file *filp)
608{
609 struct acm *acm = tty->driver_data;
610
611 return tty_port_open(&acm->port, tty, filp);
612}
613
614static void acm_port_dtr_rts(struct tty_port *port, int raise)
615{
616 struct acm *acm = container_of(port, struct acm, port);
617 int val;
618 int res;
619
620 if (raise)
621 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
622 else
623 val = 0;
624
625 /* FIXME: add missing ctrlout locking throughout driver */
626 acm->ctrlout = val;
627
628 res = acm_set_control(acm, val);
629 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
630 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
631}
632
633static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
634{
635 struct acm *acm = container_of(port, struct acm, port);
636 int retval = -ENODEV;
637 int i;
638
639 mutex_lock(&acm->mutex);
640 if (acm->disconnected)
641 goto disconnected;
642
643 retval = usb_autopm_get_interface(acm->control);
644 if (retval)
645 goto error_get_interface;
646
647 /*
648 * FIXME: Why do we need this? Allocating 64K of physically contiguous
649 * memory is really nasty...
650 */
651 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
652 acm->control->needs_remote_wakeup = 1;
653
654 acm->ctrlurb->dev = acm->dev;
655 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
656 if (retval) {
657 dev_err(&acm->control->dev,
658 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
659 goto error_submit_urb;
660 }
661
662 acm_tty_set_termios(tty, NULL);
663
664 /*
665 * Unthrottle device in case the TTY was closed while throttled.
666 */
667 clear_bit(ACM_THROTTLED, &acm->flags);
668
669 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
670 if (retval)
671 goto error_submit_read_urbs;
672
673 usb_autopm_put_interface(acm->control);
674
675 mutex_unlock(&acm->mutex);
676
677 return 0;
678
679error_submit_read_urbs:
680 for (i = 0; i < acm->rx_buflimit; i++)
681 usb_kill_urb(acm->read_urbs[i]);
682 usb_kill_urb(acm->ctrlurb);
683error_submit_urb:
684 usb_autopm_put_interface(acm->control);
685error_get_interface:
686disconnected:
687 mutex_unlock(&acm->mutex);
688
689 return usb_translate_errors(retval);
690}
691
692static void acm_port_destruct(struct tty_port *port)
693{
694 struct acm *acm = container_of(port, struct acm, port);
695
696 acm_release_minor(acm);
697 usb_put_intf(acm->control);
698 kfree(acm->country_codes);
699 kfree(acm);
700}
701
702static void acm_port_shutdown(struct tty_port *port)
703{
704 struct acm *acm = container_of(port, struct acm, port);
705 struct urb *urb;
706 struct acm_wb *wb;
707
708 /*
709 * Need to grab write_lock to prevent race with resume, but no need to
710 * hold it due to the tty-port initialised flag.
711 */
712 spin_lock_irq(&acm->write_lock);
713 spin_unlock_irq(&acm->write_lock);
714
715 usb_autopm_get_interface_no_resume(acm->control);
716 acm->control->needs_remote_wakeup = 0;
717 usb_autopm_put_interface(acm->control);
718
719 for (;;) {
720 urb = usb_get_from_anchor(&acm->delayed);
721 if (!urb)
722 break;
723 wb = urb->context;
724 wb->use = 0;
725 usb_autopm_put_interface_async(acm->control);
726 }
727
728 acm_kill_urbs(acm);
729}
730
731static void acm_tty_cleanup(struct tty_struct *tty)
732{
733 struct acm *acm = tty->driver_data;
734
735 tty_port_put(&acm->port);
736}
737
738static void acm_tty_hangup(struct tty_struct *tty)
739{
740 struct acm *acm = tty->driver_data;
741
742 tty_port_hangup(&acm->port);
743}
744
745static void acm_tty_close(struct tty_struct *tty, struct file *filp)
746{
747 struct acm *acm = tty->driver_data;
748
749 tty_port_close(&acm->port, tty, filp);
750}
751
752static int acm_tty_write(struct tty_struct *tty,
753 const unsigned char *buf, int count)
754{
755 struct acm *acm = tty->driver_data;
756 int stat;
757 unsigned long flags;
758 int wbn;
759 struct acm_wb *wb;
760
761 if (!count)
762 return 0;
763
764 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
765
766 spin_lock_irqsave(&acm->write_lock, flags);
767 wbn = acm_wb_alloc(acm);
768 if (wbn < 0) {
769 spin_unlock_irqrestore(&acm->write_lock, flags);
770 return 0;
771 }
772 wb = &acm->wb[wbn];
773
774 if (!acm->dev) {
775 wb->use = 0;
776 spin_unlock_irqrestore(&acm->write_lock, flags);
777 return -ENODEV;
778 }
779
780 count = (count > acm->writesize) ? acm->writesize : count;
781 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
782 memcpy(wb->buf, buf, count);
783 wb->len = count;
784
785 stat = usb_autopm_get_interface_async(acm->control);
786 if (stat) {
787 wb->use = 0;
788 spin_unlock_irqrestore(&acm->write_lock, flags);
789 return stat;
790 }
791
792 if (acm->susp_count) {
793 usb_anchor_urb(wb->urb, &acm->delayed);
794 spin_unlock_irqrestore(&acm->write_lock, flags);
795 return count;
796 }
797
798 stat = acm_start_wb(acm, wb);
799 spin_unlock_irqrestore(&acm->write_lock, flags);
800
801 if (stat < 0)
802 return stat;
803 return count;
804}
805
806static int acm_tty_write_room(struct tty_struct *tty)
807{
808 struct acm *acm = tty->driver_data;
809 /*
810 * Do not let the line discipline to know that we have a reserve,
811 * or it might get too enthusiastic.
812 */
813 return acm_wb_is_avail(acm) ? acm->writesize : 0;
814}
815
816static int acm_tty_chars_in_buffer(struct tty_struct *tty)
817{
818 struct acm *acm = tty->driver_data;
819 /*
820 * if the device was unplugged then any remaining characters fell out
821 * of the connector ;)
822 */
823 if (acm->disconnected)
824 return 0;
825 /*
826 * This is inaccurate (overcounts), but it works.
827 */
828 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
829}
830
831static void acm_tty_throttle(struct tty_struct *tty)
832{
833 struct acm *acm = tty->driver_data;
834
835 set_bit(ACM_THROTTLED, &acm->flags);
836}
837
838static void acm_tty_unthrottle(struct tty_struct *tty)
839{
840 struct acm *acm = tty->driver_data;
841
842 clear_bit(ACM_THROTTLED, &acm->flags);
843
844 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */
845 smp_mb();
846
847 acm_submit_read_urbs(acm, GFP_KERNEL);
848}
849
850static int acm_tty_break_ctl(struct tty_struct *tty, int state)
851{
852 struct acm *acm = tty->driver_data;
853 int retval;
854
855 retval = acm_send_break(acm, state ? 0xffff : 0);
856 if (retval < 0)
857 dev_dbg(&acm->control->dev,
858 "%s - send break failed\n", __func__);
859 return retval;
860}
861
862static int acm_tty_tiocmget(struct tty_struct *tty)
863{
864 struct acm *acm = tty->driver_data;
865
866 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
867 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
868 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
869 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
870 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
871 TIOCM_CTS;
872}
873
874static int acm_tty_tiocmset(struct tty_struct *tty,
875 unsigned int set, unsigned int clear)
876{
877 struct acm *acm = tty->driver_data;
878 unsigned int newctrl;
879
880 newctrl = acm->ctrlout;
881 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
882 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
883 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
884 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
885
886 newctrl = (newctrl & ~clear) | set;
887
888 if (acm->ctrlout == newctrl)
889 return 0;
890 return acm_set_control(acm, acm->ctrlout = newctrl);
891}
892
893static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
894{
895 struct acm *acm = tty->driver_data;
896
897 ss->xmit_fifo_size = acm->writesize;
898 ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
899 ss->close_delay = acm->port.close_delay / 10;
900 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
901 ASYNC_CLOSING_WAIT_NONE :
902 acm->port.closing_wait / 10;
903 return 0;
904}
905
906static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
907{
908 struct acm *acm = tty->driver_data;
909 unsigned int closing_wait, close_delay;
910 int retval = 0;
911
912 close_delay = ss->close_delay * 10;
913 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
914 ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
915
916 mutex_lock(&acm->port.mutex);
917
918 if (!capable(CAP_SYS_ADMIN)) {
919 if ((close_delay != acm->port.close_delay) ||
920 (closing_wait != acm->port.closing_wait))
921 retval = -EPERM;
922 else
923 retval = -EOPNOTSUPP;
924 } else {
925 acm->port.close_delay = close_delay;
926 acm->port.closing_wait = closing_wait;
927 }
928
929 mutex_unlock(&acm->port.mutex);
930 return retval;
931}
932
933static int wait_serial_change(struct acm *acm, unsigned long arg)
934{
935 int rv = 0;
936 DECLARE_WAITQUEUE(wait, current);
937 struct async_icount old, new;
938
939 do {
940 spin_lock_irq(&acm->read_lock);
941 old = acm->oldcount;
942 new = acm->iocount;
943 acm->oldcount = new;
944 spin_unlock_irq(&acm->read_lock);
945
946 if ((arg & TIOCM_DSR) &&
947 old.dsr != new.dsr)
948 break;
949 if ((arg & TIOCM_CD) &&
950 old.dcd != new.dcd)
951 break;
952 if ((arg & TIOCM_RI) &&
953 old.rng != new.rng)
954 break;
955
956 add_wait_queue(&acm->wioctl, &wait);
957 set_current_state(TASK_INTERRUPTIBLE);
958 schedule();
959 remove_wait_queue(&acm->wioctl, &wait);
960 if (acm->disconnected) {
961 if (arg & TIOCM_CD)
962 break;
963 else
964 rv = -ENODEV;
965 } else {
966 if (signal_pending(current))
967 rv = -ERESTARTSYS;
968 }
969 } while (!rv);
970
971
972
973 return rv;
974}
975
976static int acm_tty_get_icount(struct tty_struct *tty,
977 struct serial_icounter_struct *icount)
978{
979 struct acm *acm = tty->driver_data;
980
981 icount->dsr = acm->iocount.dsr;
982 icount->rng = acm->iocount.rng;
983 icount->dcd = acm->iocount.dcd;
984 icount->frame = acm->iocount.frame;
985 icount->overrun = acm->iocount.overrun;
986 icount->parity = acm->iocount.parity;
987 icount->brk = acm->iocount.brk;
988
989 return 0;
990}
991
992static int acm_tty_ioctl(struct tty_struct *tty,
993 unsigned int cmd, unsigned long arg)
994{
995 struct acm *acm = tty->driver_data;
996 int rv = -ENOIOCTLCMD;
997
998 switch (cmd) {
999 case TIOCMIWAIT:
1000 rv = usb_autopm_get_interface(acm->control);
1001 if (rv < 0) {
1002 rv = -EIO;
1003 break;
1004 }
1005 rv = wait_serial_change(acm, arg);
1006 usb_autopm_put_interface(acm->control);
1007 break;
1008 }
1009
1010 return rv;
1011}
1012
1013static void acm_tty_set_termios(struct tty_struct *tty,
1014 struct ktermios *termios_old)
1015{
1016 struct acm *acm = tty->driver_data;
1017 struct ktermios *termios = &tty->termios;
1018 struct usb_cdc_line_coding newline;
1019 int newctrl = acm->ctrlout;
1020
1021 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1022 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1023 newline.bParityType = termios->c_cflag & PARENB ?
1024 (termios->c_cflag & PARODD ? 1 : 2) +
1025 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1026 switch (termios->c_cflag & CSIZE) {
1027 case CS5:
1028 newline.bDataBits = 5;
1029 break;
1030 case CS6:
1031 newline.bDataBits = 6;
1032 break;
1033 case CS7:
1034 newline.bDataBits = 7;
1035 break;
1036 case CS8:
1037 default:
1038 newline.bDataBits = 8;
1039 break;
1040 }
1041 /* FIXME: Needs to clear unsupported bits in the termios */
1042 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1043
1044 if (C_BAUD(tty) == B0) {
1045 newline.dwDTERate = acm->line.dwDTERate;
1046 newctrl &= ~ACM_CTRL_DTR;
1047 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1048 newctrl |= ACM_CTRL_DTR;
1049 }
1050
1051 if (newctrl != acm->ctrlout)
1052 acm_set_control(acm, acm->ctrlout = newctrl);
1053
1054 if (memcmp(&acm->line, &newline, sizeof newline)) {
1055 memcpy(&acm->line, &newline, sizeof newline);
1056 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1057 __func__,
1058 le32_to_cpu(newline.dwDTERate),
1059 newline.bCharFormat, newline.bParityType,
1060 newline.bDataBits);
1061 acm_set_line(acm, &acm->line);
1062 }
1063}
1064
1065static const struct tty_port_operations acm_port_ops = {
1066 .dtr_rts = acm_port_dtr_rts,
1067 .shutdown = acm_port_shutdown,
1068 .activate = acm_port_activate,
1069 .destruct = acm_port_destruct,
1070};
1071
1072/*
1073 * USB probe and disconnect routines.
1074 */
1075
1076/* Little helpers: write/read buffers free */
1077static void acm_write_buffers_free(struct acm *acm)
1078{
1079 int i;
1080 struct acm_wb *wb;
1081
1082 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1083 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1084}
1085
1086static void acm_read_buffers_free(struct acm *acm)
1087{
1088 int i;
1089
1090 for (i = 0; i < acm->rx_buflimit; i++)
1091 usb_free_coherent(acm->dev, acm->readsize,
1092 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1093}
1094
1095/* Little helper: write buffers allocate */
1096static int acm_write_buffers_alloc(struct acm *acm)
1097{
1098 int i;
1099 struct acm_wb *wb;
1100
1101 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1102 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1103 &wb->dmah);
1104 if (!wb->buf) {
1105 while (i != 0) {
1106 --i;
1107 --wb;
1108 usb_free_coherent(acm->dev, acm->writesize,
1109 wb->buf, wb->dmah);
1110 }
1111 return -ENOMEM;
1112 }
1113 }
1114 return 0;
1115}
1116
1117static int acm_probe(struct usb_interface *intf,
1118 const struct usb_device_id *id)
1119{
1120 struct usb_cdc_union_desc *union_header = NULL;
1121 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1122 unsigned char *buffer = intf->altsetting->extra;
1123 int buflen = intf->altsetting->extralen;
1124 struct usb_interface *control_interface;
1125 struct usb_interface *data_interface;
1126 struct usb_endpoint_descriptor *epctrl = NULL;
1127 struct usb_endpoint_descriptor *epread = NULL;
1128 struct usb_endpoint_descriptor *epwrite = NULL;
1129 struct usb_device *usb_dev = interface_to_usbdev(intf);
1130 struct usb_cdc_parsed_header h;
1131 struct acm *acm;
1132 int minor;
1133 int ctrlsize, readsize;
1134 u8 *buf;
1135 int call_intf_num = -1;
1136 int data_intf_num = -1;
1137 unsigned long quirks;
1138 int num_rx_buf;
1139 int i;
1140 int combined_interfaces = 0;
1141 struct device *tty_dev;
1142 int rv = -ENOMEM;
1143 int res;
1144
1145 /* normal quirks */
1146 quirks = (unsigned long)id->driver_info;
1147
1148 if (quirks == IGNORE_DEVICE)
1149 return -ENODEV;
1150
1151 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1152
1153 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1154
1155 /* handle quirks deadly to normal probing*/
1156 if (quirks == NO_UNION_NORMAL) {
1157 data_interface = usb_ifnum_to_if(usb_dev, 1);
1158 control_interface = usb_ifnum_to_if(usb_dev, 0);
1159 /* we would crash */
1160 if (!data_interface || !control_interface)
1161 return -ENODEV;
1162 goto skip_normal_probe;
1163 }
1164
1165 /* normal probing*/
1166 if (!buffer) {
1167 dev_err(&intf->dev, "Weird descriptor references\n");
1168 return -EINVAL;
1169 }
1170
1171 if (!intf->cur_altsetting)
1172 return -EINVAL;
1173
1174 if (!buflen) {
1175 if (intf->cur_altsetting->endpoint &&
1176 intf->cur_altsetting->endpoint->extralen &&
1177 intf->cur_altsetting->endpoint->extra) {
1178 dev_dbg(&intf->dev,
1179 "Seeking extra descriptors on endpoint\n");
1180 buflen = intf->cur_altsetting->endpoint->extralen;
1181 buffer = intf->cur_altsetting->endpoint->extra;
1182 } else {
1183 dev_err(&intf->dev,
1184 "Zero length descriptor references\n");
1185 return -EINVAL;
1186 }
1187 }
1188
1189 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1190 union_header = h.usb_cdc_union_desc;
1191 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1192 if (cmgmd)
1193 call_intf_num = cmgmd->bDataInterface;
1194
1195 if (!union_header) {
1196 if (call_intf_num > 0) {
1197 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1198 /* quirks for Droids MuIn LCD */
1199 if (quirks & NO_DATA_INTERFACE) {
1200 data_interface = usb_ifnum_to_if(usb_dev, 0);
1201 } else {
1202 data_intf_num = call_intf_num;
1203 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1204 }
1205 control_interface = intf;
1206 } else {
1207 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1208 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1209 return -ENODEV;
1210 } else {
1211 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1212 combined_interfaces = 1;
1213 control_interface = data_interface = intf;
1214 goto look_for_collapsed_interface;
1215 }
1216 }
1217 } else {
1218 data_intf_num = union_header->bSlaveInterface0;
1219 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1220 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1221 }
1222
1223 if (!control_interface || !data_interface) {
1224 dev_dbg(&intf->dev, "no interfaces\n");
1225 return -ENODEV;
1226 }
1227 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1228 return -ENODEV;
1229
1230 if (data_intf_num != call_intf_num)
1231 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1232
1233 if (control_interface == data_interface) {
1234 /* some broken devices designed for windows work this way */
1235 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1236 combined_interfaces = 1;
1237 /* a popular other OS doesn't use it */
1238 quirks |= NO_CAP_LINE;
1239 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1240 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1241 return -EINVAL;
1242 }
1243look_for_collapsed_interface:
1244 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1245 &epread, &epwrite, &epctrl, NULL);
1246 if (res)
1247 return res;
1248
1249 goto made_compressed_probe;
1250 }
1251
1252skip_normal_probe:
1253
1254 /*workaround for switched interfaces */
1255 if (data_interface->cur_altsetting->desc.bInterfaceClass
1256 != CDC_DATA_INTERFACE_TYPE) {
1257 if (control_interface->cur_altsetting->desc.bInterfaceClass
1258 == CDC_DATA_INTERFACE_TYPE) {
1259 dev_dbg(&intf->dev,
1260 "Your device has switched interfaces.\n");
1261 swap(control_interface, data_interface);
1262 } else {
1263 return -EINVAL;
1264 }
1265 }
1266
1267 /* Accept probe requests only for the control interface */
1268 if (!combined_interfaces && intf != control_interface)
1269 return -ENODEV;
1270
1271 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1272 /* valid in this context */
1273 dev_dbg(&intf->dev, "The data interface isn't available\n");
1274 return -EBUSY;
1275 }
1276
1277
1278 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1279 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1280 return -EINVAL;
1281
1282 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1283 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1284 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1285
1286
1287 /* workaround for switched endpoints */
1288 if (!usb_endpoint_dir_in(epread)) {
1289 /* descriptors are swapped */
1290 dev_dbg(&intf->dev,
1291 "The data interface has switched endpoints\n");
1292 swap(epread, epwrite);
1293 }
1294made_compressed_probe:
1295 dev_dbg(&intf->dev, "interfaces are valid\n");
1296
1297 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1298 if (acm == NULL)
1299 goto alloc_fail;
1300
1301 tty_port_init(&acm->port);
1302 acm->port.ops = &acm_port_ops;
1303
1304 ctrlsize = usb_endpoint_maxp(epctrl);
1305 readsize = usb_endpoint_maxp(epread) *
1306 (quirks == SINGLE_RX_URB ? 1 : 2);
1307 acm->combined_interfaces = combined_interfaces;
1308 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1309 acm->control = control_interface;
1310 acm->data = data_interface;
1311
1312 usb_get_intf(acm->control); /* undone in destruct() */
1313
1314 minor = acm_alloc_minor(acm);
1315 if (minor < 0)
1316 goto alloc_fail1;
1317
1318 acm->minor = minor;
1319 acm->dev = usb_dev;
1320 if (h.usb_cdc_acm_descriptor)
1321 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1322 if (quirks & NO_CAP_LINE)
1323 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1324 acm->ctrlsize = ctrlsize;
1325 acm->readsize = readsize;
1326 acm->rx_buflimit = num_rx_buf;
1327 INIT_WORK(&acm->work, acm_softint);
1328 init_waitqueue_head(&acm->wioctl);
1329 spin_lock_init(&acm->write_lock);
1330 spin_lock_init(&acm->read_lock);
1331 mutex_init(&acm->mutex);
1332 if (usb_endpoint_xfer_int(epread)) {
1333 acm->bInterval = epread->bInterval;
1334 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1335 } else {
1336 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1337 }
1338 if (usb_endpoint_xfer_int(epwrite))
1339 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1340 else
1341 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1342 init_usb_anchor(&acm->delayed);
1343 acm->quirks = quirks;
1344
1345 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1346 if (!buf)
1347 goto alloc_fail1;
1348 acm->ctrl_buffer = buf;
1349
1350 if (acm_write_buffers_alloc(acm) < 0)
1351 goto alloc_fail2;
1352
1353 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1354 if (!acm->ctrlurb)
1355 goto alloc_fail3;
1356
1357 for (i = 0; i < num_rx_buf; i++) {
1358 struct acm_rb *rb = &(acm->read_buffers[i]);
1359 struct urb *urb;
1360
1361 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1362 &rb->dma);
1363 if (!rb->base)
1364 goto alloc_fail4;
1365 rb->index = i;
1366 rb->instance = acm;
1367
1368 urb = usb_alloc_urb(0, GFP_KERNEL);
1369 if (!urb)
1370 goto alloc_fail4;
1371
1372 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1373 urb->transfer_dma = rb->dma;
1374 if (usb_endpoint_xfer_int(epread))
1375 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1376 acm->readsize,
1377 acm_read_bulk_callback, rb,
1378 acm->bInterval);
1379 else
1380 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1381 acm->readsize,
1382 acm_read_bulk_callback, rb);
1383
1384 acm->read_urbs[i] = urb;
1385 __set_bit(i, &acm->read_urbs_free);
1386 }
1387 for (i = 0; i < ACM_NW; i++) {
1388 struct acm_wb *snd = &(acm->wb[i]);
1389
1390 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1391 if (snd->urb == NULL)
1392 goto alloc_fail5;
1393
1394 if (usb_endpoint_xfer_int(epwrite))
1395 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1396 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1397 else
1398 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1399 NULL, acm->writesize, acm_write_bulk, snd);
1400 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1401 if (quirks & SEND_ZERO_PACKET)
1402 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1403 snd->instance = acm;
1404 }
1405
1406 usb_set_intfdata(intf, acm);
1407
1408 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1409 if (i < 0)
1410 goto alloc_fail5;
1411
1412 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1413 struct usb_cdc_country_functional_desc * cfd =
1414 h.usb_cdc_country_functional_desc;
1415
1416 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1417 if (!acm->country_codes)
1418 goto skip_countries;
1419 acm->country_code_size = cfd->bLength - 4;
1420 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1421 cfd->bLength - 4);
1422 acm->country_rel_date = cfd->iCountryCodeRelDate;
1423
1424 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1425 if (i < 0) {
1426 kfree(acm->country_codes);
1427 acm->country_codes = NULL;
1428 acm->country_code_size = 0;
1429 goto skip_countries;
1430 }
1431
1432 i = device_create_file(&intf->dev,
1433 &dev_attr_iCountryCodeRelDate);
1434 if (i < 0) {
1435 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1436 kfree(acm->country_codes);
1437 acm->country_codes = NULL;
1438 acm->country_code_size = 0;
1439 goto skip_countries;
1440 }
1441 }
1442
1443skip_countries:
1444 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1445 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1446 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1447 /* works around buggy devices */
1448 epctrl->bInterval ? epctrl->bInterval : 16);
1449 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1450 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1451 acm->notification_buffer = NULL;
1452 acm->nb_index = 0;
1453 acm->nb_size = 0;
1454
1455 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1456
1457 acm->line.dwDTERate = cpu_to_le32(9600);
1458 acm->line.bDataBits = 8;
1459 acm_set_line(acm, &acm->line);
1460
1461 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1462 usb_set_intfdata(data_interface, acm);
1463
1464 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1465 &control_interface->dev);
1466 if (IS_ERR(tty_dev)) {
1467 rv = PTR_ERR(tty_dev);
1468 goto alloc_fail6;
1469 }
1470
1471 if (quirks & CLEAR_HALT_CONDITIONS) {
1472 usb_clear_halt(usb_dev, acm->in);
1473 usb_clear_halt(usb_dev, acm->out);
1474 }
1475
1476 return 0;
1477alloc_fail6:
1478 if (acm->country_codes) {
1479 device_remove_file(&acm->control->dev,
1480 &dev_attr_wCountryCodes);
1481 device_remove_file(&acm->control->dev,
1482 &dev_attr_iCountryCodeRelDate);
1483 kfree(acm->country_codes);
1484 }
1485 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1486alloc_fail5:
1487 usb_set_intfdata(intf, NULL);
1488 for (i = 0; i < ACM_NW; i++)
1489 usb_free_urb(acm->wb[i].urb);
1490alloc_fail4:
1491 for (i = 0; i < num_rx_buf; i++)
1492 usb_free_urb(acm->read_urbs[i]);
1493 acm_read_buffers_free(acm);
1494 usb_free_urb(acm->ctrlurb);
1495alloc_fail3:
1496 acm_write_buffers_free(acm);
1497alloc_fail2:
1498 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1499alloc_fail1:
1500 tty_port_put(&acm->port);
1501alloc_fail:
1502 return rv;
1503}
1504
1505static void acm_disconnect(struct usb_interface *intf)
1506{
1507 struct acm *acm = usb_get_intfdata(intf);
1508 struct tty_struct *tty;
1509 int i;
1510
1511 /* sibling interface is already cleaning up */
1512 if (!acm)
1513 return;
1514
1515 mutex_lock(&acm->mutex);
1516 acm->disconnected = true;
1517 if (acm->country_codes) {
1518 device_remove_file(&acm->control->dev,
1519 &dev_attr_wCountryCodes);
1520 device_remove_file(&acm->control->dev,
1521 &dev_attr_iCountryCodeRelDate);
1522 }
1523 wake_up_all(&acm->wioctl);
1524 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1525 usb_set_intfdata(acm->control, NULL);
1526 usb_set_intfdata(acm->data, NULL);
1527 mutex_unlock(&acm->mutex);
1528
1529 tty = tty_port_tty_get(&acm->port);
1530 if (tty) {
1531 tty_vhangup(tty);
1532 tty_kref_put(tty);
1533 }
1534
1535 acm_kill_urbs(acm);
1536 cancel_work_sync(&acm->work);
1537
1538 tty_unregister_device(acm_tty_driver, acm->minor);
1539
1540 usb_free_urb(acm->ctrlurb);
1541 for (i = 0; i < ACM_NW; i++)
1542 usb_free_urb(acm->wb[i].urb);
1543 for (i = 0; i < acm->rx_buflimit; i++)
1544 usb_free_urb(acm->read_urbs[i]);
1545 acm_write_buffers_free(acm);
1546 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1547 acm_read_buffers_free(acm);
1548
1549 kfree(acm->notification_buffer);
1550
1551 if (!acm->combined_interfaces)
1552 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1553 acm->data : acm->control);
1554
1555 tty_port_put(&acm->port);
1556}
1557
1558#ifdef CONFIG_PM
1559static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1560{
1561 struct acm *acm = usb_get_intfdata(intf);
1562 int cnt;
1563
1564 spin_lock_irq(&acm->write_lock);
1565 if (PMSG_IS_AUTO(message)) {
1566 if (acm->transmitting) {
1567 spin_unlock_irq(&acm->write_lock);
1568 return -EBUSY;
1569 }
1570 }
1571 cnt = acm->susp_count++;
1572 spin_unlock_irq(&acm->write_lock);
1573
1574 if (cnt)
1575 return 0;
1576
1577 acm_kill_urbs(acm);
1578 cancel_work_sync(&acm->work);
1579
1580 return 0;
1581}
1582
1583static int acm_resume(struct usb_interface *intf)
1584{
1585 struct acm *acm = usb_get_intfdata(intf);
1586 struct urb *urb;
1587 int rv = 0;
1588
1589 spin_lock_irq(&acm->write_lock);
1590
1591 if (--acm->susp_count)
1592 goto out;
1593
1594 if (tty_port_initialized(&acm->port)) {
1595 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1596
1597 for (;;) {
1598 urb = usb_get_from_anchor(&acm->delayed);
1599 if (!urb)
1600 break;
1601
1602 acm_start_wb(acm, urb->context);
1603 }
1604
1605 /*
1606 * delayed error checking because we must
1607 * do the write path at all cost
1608 */
1609 if (rv < 0)
1610 goto out;
1611
1612 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1613 }
1614out:
1615 spin_unlock_irq(&acm->write_lock);
1616
1617 return rv;
1618}
1619
1620static int acm_reset_resume(struct usb_interface *intf)
1621{
1622 struct acm *acm = usb_get_intfdata(intf);
1623
1624 if (tty_port_initialized(&acm->port))
1625 tty_port_tty_hangup(&acm->port, false);
1626
1627 return acm_resume(intf);
1628}
1629
1630#endif /* CONFIG_PM */
1631
1632static int acm_pre_reset(struct usb_interface *intf)
1633{
1634 struct acm *acm = usb_get_intfdata(intf);
1635
1636 clear_bit(EVENT_RX_STALL, &acm->flags);
1637 acm->nb_index = 0; /* pending control transfers are lost */
1638
1639 return 0;
1640}
1641
1642#define NOKIA_PCSUITE_ACM_INFO(x) \
1643 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1644 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1645 USB_CDC_ACM_PROTO_VENDOR)
1646
1647#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1648 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1649 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1650 USB_CDC_ACM_PROTO_VENDOR)
1651
1652/*
1653 * USB driver structure.
1654 */
1655
1656static const struct usb_device_id acm_ids[] = {
1657 /* quirky and broken devices */
1658 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1659 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1660 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1661 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1662 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1663 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1664 },
1665 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1666 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1667 },
1668 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */
1669 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
1670 },
1671 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1672 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1673 },
1674 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1675 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1676 },
1677 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1678 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1679 },
1680 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1681 .driver_info = SINGLE_RX_URB,
1682 },
1683 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1684 .driver_info = SINGLE_RX_URB, /* firmware bug */
1685 },
1686 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1687 .driver_info = SINGLE_RX_URB, /* firmware bug */
1688 },
1689 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1690 .driver_info = SINGLE_RX_URB,
1691 },
1692 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
1693 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1694 },
1695 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1696 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1697 },
1698 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1699 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1700 },
1701 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1702 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1703 },
1704 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1705 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1706 },
1707 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1708 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1709 },
1710 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
1711 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1712 },
1713 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1714 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1715 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1716 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1717 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1718 },
1719 /* Motorola H24 HSPA module: */
1720 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1721 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1723 },
1724 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1725 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1726 },
1727 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1728 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1729 },
1730 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1731 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1732 },
1733 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1734 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1735 },
1736 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1737 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1738 },
1739 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1740 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1741 },
1742
1743 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1744 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1745 data interface instead of
1746 communications interface.
1747 Maybe we should define a new
1748 quirk for this. */
1749 },
1750 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1751 .driver_info = NO_UNION_NORMAL,
1752 },
1753 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1754 .driver_info = NO_UNION_NORMAL,
1755 },
1756 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1757 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1758 },
1759 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1760 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1761 },
1762 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1763 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1764 },
1765 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1766 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1767 },
1768 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
1769 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1770 },
1771
1772 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1773 .driver_info = CLEAR_HALT_CONDITIONS,
1774 },
1775
1776 /* Nokia S60 phones expose two ACM channels. The first is
1777 * a modem and is picked up by the standard AT-command
1778 * information below. The second is 'vendor-specific' but
1779 * is treated as a serial device at the S60 end, so we want
1780 * to expose it on Linux too. */
1781 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1783 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1787 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1792 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1796 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1799 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1801 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1802 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1804 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1805 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1810 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1811 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1812 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1813 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1817 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1821 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1822 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1823 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1827 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1828 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1830 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1831 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1832 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1833 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1834 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1836 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1837 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1838 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1839
1840 /* Support for Owen devices */
1841 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1842
1843 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1844
1845 /* Support for Droids MuIn LCD */
1846 { USB_DEVICE(0x04d8, 0x000b),
1847 .driver_info = NO_DATA_INTERFACE,
1848 },
1849
1850#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1851 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1852 .driver_info = IGNORE_DEVICE,
1853 },
1854 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1855 .driver_info = IGNORE_DEVICE,
1856 },
1857#endif
1858
1859 /*Samsung phone in firmware update mode */
1860 { USB_DEVICE(0x04e8, 0x685d),
1861 .driver_info = IGNORE_DEVICE,
1862 },
1863
1864 /* Exclude Infineon Flash Loader utility */
1865 { USB_DEVICE(0x058b, 0x0041),
1866 .driver_info = IGNORE_DEVICE,
1867 },
1868
1869 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
1870 .driver_info = SEND_ZERO_PACKET,
1871 },
1872 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
1873 .driver_info = SEND_ZERO_PACKET,
1874 },
1875
1876 /* control interfaces without any protocol set */
1877 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1878 USB_CDC_PROTO_NONE) },
1879
1880 /* control interfaces with various AT-command sets */
1881 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1882 USB_CDC_ACM_PROTO_AT_V25TER) },
1883 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1884 USB_CDC_ACM_PROTO_AT_PCCA101) },
1885 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1886 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1887 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1888 USB_CDC_ACM_PROTO_AT_GSM) },
1889 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1890 USB_CDC_ACM_PROTO_AT_3G) },
1891 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1892 USB_CDC_ACM_PROTO_AT_CDMA) },
1893
1894 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1895 .driver_info = SEND_ZERO_PACKET,
1896 },
1897
1898 { }
1899};
1900
1901MODULE_DEVICE_TABLE(usb, acm_ids);
1902
1903static struct usb_driver acm_driver = {
1904 .name = "cdc_acm",
1905 .probe = acm_probe,
1906 .disconnect = acm_disconnect,
1907#ifdef CONFIG_PM
1908 .suspend = acm_suspend,
1909 .resume = acm_resume,
1910 .reset_resume = acm_reset_resume,
1911#endif
1912 .pre_reset = acm_pre_reset,
1913 .id_table = acm_ids,
1914#ifdef CONFIG_PM
1915 .supports_autosuspend = 1,
1916#endif
1917 .disable_hub_initiated_lpm = 1,
1918};
1919
1920/*
1921 * TTY driver structures.
1922 */
1923
1924static const struct tty_operations acm_ops = {
1925 .install = acm_tty_install,
1926 .open = acm_tty_open,
1927 .close = acm_tty_close,
1928 .cleanup = acm_tty_cleanup,
1929 .hangup = acm_tty_hangup,
1930 .write = acm_tty_write,
1931 .write_room = acm_tty_write_room,
1932 .ioctl = acm_tty_ioctl,
1933 .throttle = acm_tty_throttle,
1934 .unthrottle = acm_tty_unthrottle,
1935 .chars_in_buffer = acm_tty_chars_in_buffer,
1936 .break_ctl = acm_tty_break_ctl,
1937 .set_termios = acm_tty_set_termios,
1938 .tiocmget = acm_tty_tiocmget,
1939 .tiocmset = acm_tty_tiocmset,
1940 .get_serial = get_serial_info,
1941 .set_serial = set_serial_info,
1942 .get_icount = acm_tty_get_icount,
1943};
1944
1945/*
1946 * Init / exit.
1947 */
1948
1949static int __init acm_init(void)
1950{
1951 int retval;
1952 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1953 if (!acm_tty_driver)
1954 return -ENOMEM;
1955 acm_tty_driver->driver_name = "acm",
1956 acm_tty_driver->name = "ttyACM",
1957 acm_tty_driver->major = ACM_TTY_MAJOR,
1958 acm_tty_driver->minor_start = 0,
1959 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1960 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1961 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1962 acm_tty_driver->init_termios = tty_std_termios;
1963 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1964 HUPCL | CLOCAL;
1965 tty_set_operations(acm_tty_driver, &acm_ops);
1966
1967 retval = tty_register_driver(acm_tty_driver);
1968 if (retval) {
1969 put_tty_driver(acm_tty_driver);
1970 return retval;
1971 }
1972
1973 retval = usb_register(&acm_driver);
1974 if (retval) {
1975 tty_unregister_driver(acm_tty_driver);
1976 put_tty_driver(acm_tty_driver);
1977 return retval;
1978 }
1979
1980 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1981
1982 return 0;
1983}
1984
1985static void __exit acm_exit(void)
1986{
1987 usb_deregister(&acm_driver);
1988 tty_unregister_driver(acm_tty_driver);
1989 put_tty_driver(acm_tty_driver);
1990 idr_destroy(&acm_minors);
1991}
1992
1993module_init(acm_init);
1994module_exit(acm_exit);
1995
1996MODULE_AUTHOR(DRIVER_AUTHOR);
1997MODULE_DESCRIPTION(DRIVER_DESC);
1998MODULE_LICENSE("GPL");
1999MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);