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Merge tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / usb / class / cdc-acm.c
1 /*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #undef DEBUG
32 #undef VERBOSE_DEBUG
33
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/tty.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/tty_flip.h>
42 #include <linux/module.h>
43 #include <linux/mutex.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/usb/cdc.h>
47 #include <asm/byteorder.h>
48 #include <asm/unaligned.h>
49 #include <linux/idr.h>
50 #include <linux/list.h>
51
52 #include "cdc-acm.h"
53
54
55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
57
58 static struct usb_driver acm_driver;
59 static struct tty_driver *acm_tty_driver;
60
61 static DEFINE_IDR(acm_minors);
62 static DEFINE_MUTEX(acm_minors_lock);
63
64 static void acm_tty_set_termios(struct tty_struct *tty,
65 struct ktermios *termios_old);
66
67 /*
68 * acm_minors accessors
69 */
70
71 /*
72 * Look up an ACM structure by minor. If found and not disconnected, increment
73 * its refcount and return it with its mutex held.
74 */
75 static struct acm *acm_get_by_minor(unsigned int minor)
76 {
77 struct acm *acm;
78
79 mutex_lock(&acm_minors_lock);
80 acm = idr_find(&acm_minors, minor);
81 if (acm) {
82 mutex_lock(&acm->mutex);
83 if (acm->disconnected) {
84 mutex_unlock(&acm->mutex);
85 acm = NULL;
86 } else {
87 tty_port_get(&acm->port);
88 mutex_unlock(&acm->mutex);
89 }
90 }
91 mutex_unlock(&acm_minors_lock);
92 return acm;
93 }
94
95 /*
96 * Try to find an available minor number and if found, associate it with 'acm'.
97 */
98 static int acm_alloc_minor(struct acm *acm)
99 {
100 int minor;
101
102 mutex_lock(&acm_minors_lock);
103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
104 mutex_unlock(&acm_minors_lock);
105
106 return minor;
107 }
108
109 /* Release the minor number associated with 'acm'. */
110 static void acm_release_minor(struct acm *acm)
111 {
112 mutex_lock(&acm_minors_lock);
113 idr_remove(&acm_minors, acm->minor);
114 mutex_unlock(&acm_minors_lock);
115 }
116
117 /*
118 * Functions for ACM control messages.
119 */
120
121 static int acm_ctrl_msg(struct acm *acm, int request, int value,
122 void *buf, int len)
123 {
124 int retval;
125
126 retval = usb_autopm_get_interface(acm->control);
127 if (retval)
128 return retval;
129
130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
131 request, USB_RT_ACM, value,
132 acm->control->altsetting[0].desc.bInterfaceNumber,
133 buf, len, 5000);
134
135 dev_dbg(&acm->control->dev,
136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__, request, value, len, retval);
138
139 usb_autopm_put_interface(acm->control);
140
141 return retval < 0 ? retval : 0;
142 }
143
144 /* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
146 */
147 static inline int acm_set_control(struct acm *acm, int control)
148 {
149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
150 return -EOPNOTSUPP;
151
152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
153 control, NULL, 0);
154 }
155
156 #define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158 #define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
160
161 /*
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
166 static int acm_wb_alloc(struct acm *acm)
167 {
168 int i, wbn;
169 struct acm_wb *wb;
170
171 wbn = 0;
172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 return wbn;
178 }
179 wbn = (wbn + 1) % ACM_NW;
180 if (++i >= ACM_NW)
181 return -1;
182 }
183 }
184
185 static int acm_wb_is_avail(struct acm *acm)
186 {
187 int i, n;
188 unsigned long flags;
189
190 n = ACM_NW;
191 spin_lock_irqsave(&acm->write_lock, flags);
192 for (i = 0; i < ACM_NW; i++)
193 n -= acm->wb[i].use;
194 spin_unlock_irqrestore(&acm->write_lock, flags);
195 return n;
196 }
197
198 /*
199 * Finish write. Caller must hold acm->write_lock
200 */
201 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
202 {
203 wb->use = 0;
204 acm->transmitting--;
205 usb_autopm_put_interface_async(acm->control);
206 }
207
208 /*
209 * Poke write.
210 *
211 * the caller is responsible for locking
212 */
213
214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
215 {
216 int rc;
217
218 acm->transmitting++;
219
220 wb->urb->transfer_buffer = wb->buf;
221 wb->urb->transfer_dma = wb->dmah;
222 wb->urb->transfer_buffer_length = wb->len;
223 wb->urb->dev = acm->dev;
224
225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
226 if (rc < 0) {
227 dev_err(&acm->data->dev,
228 "%s - usb_submit_urb(write bulk) failed: %d\n",
229 __func__, rc);
230 acm_write_done(acm, wb);
231 }
232 return rc;
233 }
234
235 /*
236 * attributes exported through sysfs
237 */
238 static ssize_t show_caps
239 (struct device *dev, struct device_attribute *attr, char *buf)
240 {
241 struct usb_interface *intf = to_usb_interface(dev);
242 struct acm *acm = usb_get_intfdata(intf);
243
244 return sprintf(buf, "%d", acm->ctrl_caps);
245 }
246 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
247
248 static ssize_t show_country_codes
249 (struct device *dev, struct device_attribute *attr, char *buf)
250 {
251 struct usb_interface *intf = to_usb_interface(dev);
252 struct acm *acm = usb_get_intfdata(intf);
253
254 memcpy(buf, acm->country_codes, acm->country_code_size);
255 return acm->country_code_size;
256 }
257
258 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
259
260 static ssize_t show_country_rel_date
261 (struct device *dev, struct device_attribute *attr, char *buf)
262 {
263 struct usb_interface *intf = to_usb_interface(dev);
264 struct acm *acm = usb_get_intfdata(intf);
265
266 return sprintf(buf, "%d", acm->country_rel_date);
267 }
268
269 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
270 /*
271 * Interrupt handlers for various ACM device responses
272 */
273
274 /* control interface reports status changes with "interrupt" transfers */
275 static void acm_ctrl_irq(struct urb *urb)
276 {
277 struct acm *acm = urb->context;
278 struct usb_cdc_notification *dr = urb->transfer_buffer;
279 unsigned char *data;
280 int newctrl;
281 int difference;
282 int retval;
283 int status = urb->status;
284
285 switch (status) {
286 case 0:
287 /* success */
288 break;
289 case -ECONNRESET:
290 case -ENOENT:
291 case -ESHUTDOWN:
292 /* this urb is terminated, clean up */
293 dev_dbg(&acm->control->dev,
294 "%s - urb shutting down with status: %d\n",
295 __func__, status);
296 return;
297 default:
298 dev_dbg(&acm->control->dev,
299 "%s - nonzero urb status received: %d\n",
300 __func__, status);
301 goto exit;
302 }
303
304 usb_mark_last_busy(acm->dev);
305
306 data = (unsigned char *)(dr + 1);
307 switch (dr->bNotificationType) {
308 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
310 __func__, dr->wValue);
311 break;
312
313 case USB_CDC_NOTIFY_SERIAL_STATE:
314 newctrl = get_unaligned_le16(data);
315
316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
317 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
318 __func__);
319 tty_port_tty_hangup(&acm->port, false);
320 }
321
322 difference = acm->ctrlin ^ newctrl;
323 spin_lock(&acm->read_lock);
324 acm->ctrlin = newctrl;
325 acm->oldcount = acm->iocount;
326
327 if (difference & ACM_CTRL_DSR)
328 acm->iocount.dsr++;
329 if (difference & ACM_CTRL_BRK)
330 acm->iocount.brk++;
331 if (difference & ACM_CTRL_RI)
332 acm->iocount.rng++;
333 if (difference & ACM_CTRL_DCD)
334 acm->iocount.dcd++;
335 if (difference & ACM_CTRL_FRAMING)
336 acm->iocount.frame++;
337 if (difference & ACM_CTRL_PARITY)
338 acm->iocount.parity++;
339 if (difference & ACM_CTRL_OVERRUN)
340 acm->iocount.overrun++;
341 spin_unlock(&acm->read_lock);
342
343 if (difference)
344 wake_up_all(&acm->wioctl);
345
346 break;
347
348 default:
349 dev_dbg(&acm->control->dev,
350 "%s - unknown notification %d received: index %d "
351 "len %d data0 %d data1 %d\n",
352 __func__,
353 dr->bNotificationType, dr->wIndex,
354 dr->wLength, data[0], data[1]);
355 break;
356 }
357 exit:
358 retval = usb_submit_urb(urb, GFP_ATOMIC);
359 if (retval && retval != -EPERM)
360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
361 __func__, retval);
362 }
363
364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
365 {
366 int res;
367
368 if (!test_and_clear_bit(index, &acm->read_urbs_free))
369 return 0;
370
371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
372
373 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
374 if (res) {
375 if (res != -EPERM) {
376 dev_err(&acm->data->dev,
377 "%s - usb_submit_urb failed: %d\n",
378 __func__, res);
379 }
380 set_bit(index, &acm->read_urbs_free);
381 return res;
382 }
383
384 return 0;
385 }
386
387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
388 {
389 int res;
390 int i;
391
392 for (i = 0; i < acm->rx_buflimit; ++i) {
393 res = acm_submit_read_urb(acm, i, mem_flags);
394 if (res)
395 return res;
396 }
397
398 return 0;
399 }
400
401 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
402 {
403 if (!urb->actual_length)
404 return;
405
406 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
407 urb->actual_length);
408 tty_flip_buffer_push(&acm->port);
409 }
410
411 static void acm_read_bulk_callback(struct urb *urb)
412 {
413 struct acm_rb *rb = urb->context;
414 struct acm *acm = rb->instance;
415 unsigned long flags;
416 int status = urb->status;
417
418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
419 rb->index, urb->actual_length);
420
421 if (!acm->dev) {
422 set_bit(rb->index, &acm->read_urbs_free);
423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
424 return;
425 }
426
427 if (status) {
428 set_bit(rb->index, &acm->read_urbs_free);
429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
430 __func__, status);
431 if ((status != -ENOENT) || (urb->actual_length == 0))
432 return;
433 }
434
435 usb_mark_last_busy(acm->dev);
436
437 acm_process_read_urb(acm, urb);
438 /*
439 * Unthrottle may run on another CPU which needs to see events
440 * in the same order. Submission has an implict barrier
441 */
442 smp_mb__before_atomic();
443 set_bit(rb->index, &acm->read_urbs_free);
444
445 /* throttle device if requested by tty */
446 spin_lock_irqsave(&acm->read_lock, flags);
447 acm->throttled = acm->throttle_req;
448 if (!acm->throttled) {
449 spin_unlock_irqrestore(&acm->read_lock, flags);
450 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
451 } else {
452 spin_unlock_irqrestore(&acm->read_lock, flags);
453 }
454 }
455
456 /* data interface wrote those outgoing bytes */
457 static void acm_write_bulk(struct urb *urb)
458 {
459 struct acm_wb *wb = urb->context;
460 struct acm *acm = wb->instance;
461 unsigned long flags;
462 int status = urb->status;
463
464 if (status || (urb->actual_length != urb->transfer_buffer_length))
465 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
466 __func__,
467 urb->actual_length,
468 urb->transfer_buffer_length,
469 status);
470
471 spin_lock_irqsave(&acm->write_lock, flags);
472 acm_write_done(acm, wb);
473 spin_unlock_irqrestore(&acm->write_lock, flags);
474 schedule_work(&acm->work);
475 }
476
477 static void acm_softint(struct work_struct *work)
478 {
479 struct acm *acm = container_of(work, struct acm, work);
480
481 dev_vdbg(&acm->data->dev, "%s\n", __func__);
482
483 tty_port_tty_wakeup(&acm->port);
484 }
485
486 /*
487 * TTY handlers
488 */
489
490 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
491 {
492 struct acm *acm;
493 int retval;
494
495 dev_dbg(tty->dev, "%s\n", __func__);
496
497 acm = acm_get_by_minor(tty->index);
498 if (!acm)
499 return -ENODEV;
500
501 retval = tty_standard_install(driver, tty);
502 if (retval)
503 goto error_init_termios;
504
505 tty->driver_data = acm;
506
507 return 0;
508
509 error_init_termios:
510 tty_port_put(&acm->port);
511 return retval;
512 }
513
514 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
515 {
516 struct acm *acm = tty->driver_data;
517
518 dev_dbg(tty->dev, "%s\n", __func__);
519
520 return tty_port_open(&acm->port, tty, filp);
521 }
522
523 static void acm_port_dtr_rts(struct tty_port *port, int raise)
524 {
525 struct acm *acm = container_of(port, struct acm, port);
526 int val;
527 int res;
528
529 if (raise)
530 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
531 else
532 val = 0;
533
534 /* FIXME: add missing ctrlout locking throughout driver */
535 acm->ctrlout = val;
536
537 res = acm_set_control(acm, val);
538 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
539 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
540 }
541
542 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
543 {
544 struct acm *acm = container_of(port, struct acm, port);
545 int retval = -ENODEV;
546 int i;
547
548 dev_dbg(&acm->control->dev, "%s\n", __func__);
549
550 mutex_lock(&acm->mutex);
551 if (acm->disconnected)
552 goto disconnected;
553
554 retval = usb_autopm_get_interface(acm->control);
555 if (retval)
556 goto error_get_interface;
557
558 /*
559 * FIXME: Why do we need this? Allocating 64K of physically contiguous
560 * memory is really nasty...
561 */
562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
563 acm->control->needs_remote_wakeup = 1;
564
565 acm->ctrlurb->dev = acm->dev;
566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
567 if (retval) {
568 dev_err(&acm->control->dev,
569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
570 goto error_submit_urb;
571 }
572
573 acm_tty_set_termios(tty, NULL);
574
575 /*
576 * Unthrottle device in case the TTY was closed while throttled.
577 */
578 spin_lock_irq(&acm->read_lock);
579 acm->throttled = 0;
580 acm->throttle_req = 0;
581 spin_unlock_irq(&acm->read_lock);
582
583 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
584 if (retval)
585 goto error_submit_read_urbs;
586
587 usb_autopm_put_interface(acm->control);
588
589 mutex_unlock(&acm->mutex);
590
591 return 0;
592
593 error_submit_read_urbs:
594 for (i = 0; i < acm->rx_buflimit; i++)
595 usb_kill_urb(acm->read_urbs[i]);
596 usb_kill_urb(acm->ctrlurb);
597 error_submit_urb:
598 usb_autopm_put_interface(acm->control);
599 error_get_interface:
600 disconnected:
601 mutex_unlock(&acm->mutex);
602
603 return usb_translate_errors(retval);
604 }
605
606 static void acm_port_destruct(struct tty_port *port)
607 {
608 struct acm *acm = container_of(port, struct acm, port);
609
610 dev_dbg(&acm->control->dev, "%s\n", __func__);
611
612 acm_release_minor(acm);
613 usb_put_intf(acm->control);
614 kfree(acm->country_codes);
615 kfree(acm);
616 }
617
618 static void acm_port_shutdown(struct tty_port *port)
619 {
620 struct acm *acm = container_of(port, struct acm, port);
621 struct urb *urb;
622 struct acm_wb *wb;
623 int i;
624
625 dev_dbg(&acm->control->dev, "%s\n", __func__);
626
627 /*
628 * Need to grab write_lock to prevent race with resume, but no need to
629 * hold it due to the tty-port initialised flag.
630 */
631 spin_lock_irq(&acm->write_lock);
632 spin_unlock_irq(&acm->write_lock);
633
634 usb_autopm_get_interface_no_resume(acm->control);
635 acm->control->needs_remote_wakeup = 0;
636 usb_autopm_put_interface(acm->control);
637
638 for (;;) {
639 urb = usb_get_from_anchor(&acm->delayed);
640 if (!urb)
641 break;
642 wb = urb->context;
643 wb->use = 0;
644 usb_autopm_put_interface_async(acm->control);
645 }
646
647 usb_kill_urb(acm->ctrlurb);
648 for (i = 0; i < ACM_NW; i++)
649 usb_kill_urb(acm->wb[i].urb);
650 for (i = 0; i < acm->rx_buflimit; i++)
651 usb_kill_urb(acm->read_urbs[i]);
652 }
653
654 static void acm_tty_cleanup(struct tty_struct *tty)
655 {
656 struct acm *acm = tty->driver_data;
657 dev_dbg(&acm->control->dev, "%s\n", __func__);
658 tty_port_put(&acm->port);
659 }
660
661 static void acm_tty_hangup(struct tty_struct *tty)
662 {
663 struct acm *acm = tty->driver_data;
664 dev_dbg(&acm->control->dev, "%s\n", __func__);
665 tty_port_hangup(&acm->port);
666 }
667
668 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
669 {
670 struct acm *acm = tty->driver_data;
671 dev_dbg(&acm->control->dev, "%s\n", __func__);
672 tty_port_close(&acm->port, tty, filp);
673 }
674
675 static int acm_tty_write(struct tty_struct *tty,
676 const unsigned char *buf, int count)
677 {
678 struct acm *acm = tty->driver_data;
679 int stat;
680 unsigned long flags;
681 int wbn;
682 struct acm_wb *wb;
683
684 if (!count)
685 return 0;
686
687 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
688
689 spin_lock_irqsave(&acm->write_lock, flags);
690 wbn = acm_wb_alloc(acm);
691 if (wbn < 0) {
692 spin_unlock_irqrestore(&acm->write_lock, flags);
693 return 0;
694 }
695 wb = &acm->wb[wbn];
696
697 if (!acm->dev) {
698 wb->use = 0;
699 spin_unlock_irqrestore(&acm->write_lock, flags);
700 return -ENODEV;
701 }
702
703 count = (count > acm->writesize) ? acm->writesize : count;
704 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
705 memcpy(wb->buf, buf, count);
706 wb->len = count;
707
708 stat = usb_autopm_get_interface_async(acm->control);
709 if (stat) {
710 wb->use = 0;
711 spin_unlock_irqrestore(&acm->write_lock, flags);
712 return stat;
713 }
714
715 if (acm->susp_count) {
716 if (acm->putbuffer) {
717 /* now to preserve order */
718 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
719 acm->putbuffer = NULL;
720 }
721 usb_anchor_urb(wb->urb, &acm->delayed);
722 spin_unlock_irqrestore(&acm->write_lock, flags);
723 return count;
724 } else {
725 if (acm->putbuffer) {
726 /* at this point there is no good way to handle errors */
727 acm_start_wb(acm, acm->putbuffer);
728 acm->putbuffer = NULL;
729 }
730 }
731
732 stat = acm_start_wb(acm, wb);
733 spin_unlock_irqrestore(&acm->write_lock, flags);
734
735 if (stat < 0)
736 return stat;
737 return count;
738 }
739
740 static void acm_tty_flush_chars(struct tty_struct *tty)
741 {
742 struct acm *acm = tty->driver_data;
743 struct acm_wb *cur = acm->putbuffer;
744 int err;
745 unsigned long flags;
746
747 if (!cur) /* nothing to do */
748 return;
749
750 acm->putbuffer = NULL;
751 err = usb_autopm_get_interface_async(acm->control);
752 spin_lock_irqsave(&acm->write_lock, flags);
753 if (err < 0) {
754 cur->use = 0;
755 acm->putbuffer = cur;
756 goto out;
757 }
758
759 if (acm->susp_count)
760 usb_anchor_urb(cur->urb, &acm->delayed);
761 else
762 acm_start_wb(acm, cur);
763 out:
764 spin_unlock_irqrestore(&acm->write_lock, flags);
765 return;
766 }
767
768 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
769 {
770 struct acm *acm = tty->driver_data;
771 struct acm_wb *cur;
772 int wbn;
773 unsigned long flags;
774
775 overflow:
776 cur = acm->putbuffer;
777 if (!cur) {
778 spin_lock_irqsave(&acm->write_lock, flags);
779 wbn = acm_wb_alloc(acm);
780 if (wbn >= 0) {
781 cur = &acm->wb[wbn];
782 acm->putbuffer = cur;
783 }
784 spin_unlock_irqrestore(&acm->write_lock, flags);
785 if (!cur)
786 return 0;
787 }
788
789 if (cur->len == acm->writesize) {
790 acm_tty_flush_chars(tty);
791 goto overflow;
792 }
793
794 cur->buf[cur->len++] = ch;
795 return 1;
796 }
797
798 static int acm_tty_write_room(struct tty_struct *tty)
799 {
800 struct acm *acm = tty->driver_data;
801 /*
802 * Do not let the line discipline to know that we have a reserve,
803 * or it might get too enthusiastic.
804 */
805 return acm_wb_is_avail(acm) ? acm->writesize : 0;
806 }
807
808 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
809 {
810 struct acm *acm = tty->driver_data;
811 /*
812 * if the device was unplugged then any remaining characters fell out
813 * of the connector ;)
814 */
815 if (acm->disconnected)
816 return 0;
817 /*
818 * This is inaccurate (overcounts), but it works.
819 */
820 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
821 }
822
823 static void acm_tty_throttle(struct tty_struct *tty)
824 {
825 struct acm *acm = tty->driver_data;
826
827 spin_lock_irq(&acm->read_lock);
828 acm->throttle_req = 1;
829 spin_unlock_irq(&acm->read_lock);
830 }
831
832 static void acm_tty_unthrottle(struct tty_struct *tty)
833 {
834 struct acm *acm = tty->driver_data;
835 unsigned int was_throttled;
836
837 spin_lock_irq(&acm->read_lock);
838 was_throttled = acm->throttled;
839 acm->throttled = 0;
840 acm->throttle_req = 0;
841 spin_unlock_irq(&acm->read_lock);
842
843 if (was_throttled)
844 acm_submit_read_urbs(acm, GFP_KERNEL);
845 }
846
847 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
848 {
849 struct acm *acm = tty->driver_data;
850 int retval;
851
852 retval = acm_send_break(acm, state ? 0xffff : 0);
853 if (retval < 0)
854 dev_dbg(&acm->control->dev, "%s - send break failed\n",
855 __func__);
856 return retval;
857 }
858
859 static int acm_tty_tiocmget(struct tty_struct *tty)
860 {
861 struct acm *acm = tty->driver_data;
862
863 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
864 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
865 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
866 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
867 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
868 TIOCM_CTS;
869 }
870
871 static int acm_tty_tiocmset(struct tty_struct *tty,
872 unsigned int set, unsigned int clear)
873 {
874 struct acm *acm = tty->driver_data;
875 unsigned int newctrl;
876
877 newctrl = acm->ctrlout;
878 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
879 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
880 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
881 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
882
883 newctrl = (newctrl & ~clear) | set;
884
885 if (acm->ctrlout == newctrl)
886 return 0;
887 return acm_set_control(acm, acm->ctrlout = newctrl);
888 }
889
890 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
891 {
892 struct serial_struct tmp;
893
894 if (!info)
895 return -EINVAL;
896
897 memset(&tmp, 0, sizeof(tmp));
898 tmp.flags = ASYNC_LOW_LATENCY;
899 tmp.xmit_fifo_size = acm->writesize;
900 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
901 tmp.close_delay = acm->port.close_delay / 10;
902 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
903 ASYNC_CLOSING_WAIT_NONE :
904 acm->port.closing_wait / 10;
905
906 if (copy_to_user(info, &tmp, sizeof(tmp)))
907 return -EFAULT;
908 else
909 return 0;
910 }
911
912 static int set_serial_info(struct acm *acm,
913 struct serial_struct __user *newinfo)
914 {
915 struct serial_struct new_serial;
916 unsigned int closing_wait, close_delay;
917 int retval = 0;
918
919 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
920 return -EFAULT;
921
922 close_delay = new_serial.close_delay * 10;
923 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
924 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
925
926 mutex_lock(&acm->port.mutex);
927
928 if (!capable(CAP_SYS_ADMIN)) {
929 if ((close_delay != acm->port.close_delay) ||
930 (closing_wait != acm->port.closing_wait))
931 retval = -EPERM;
932 else
933 retval = -EOPNOTSUPP;
934 } else {
935 acm->port.close_delay = close_delay;
936 acm->port.closing_wait = closing_wait;
937 }
938
939 mutex_unlock(&acm->port.mutex);
940 return retval;
941 }
942
943 static int wait_serial_change(struct acm *acm, unsigned long arg)
944 {
945 int rv = 0;
946 DECLARE_WAITQUEUE(wait, current);
947 struct async_icount old, new;
948
949 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
950 return -EINVAL;
951 do {
952 spin_lock_irq(&acm->read_lock);
953 old = acm->oldcount;
954 new = acm->iocount;
955 acm->oldcount = new;
956 spin_unlock_irq(&acm->read_lock);
957
958 if ((arg & TIOCM_DSR) &&
959 old.dsr != new.dsr)
960 break;
961 if ((arg & TIOCM_CD) &&
962 old.dcd != new.dcd)
963 break;
964 if ((arg & TIOCM_RI) &&
965 old.rng != new.rng)
966 break;
967
968 add_wait_queue(&acm->wioctl, &wait);
969 set_current_state(TASK_INTERRUPTIBLE);
970 schedule();
971 remove_wait_queue(&acm->wioctl, &wait);
972 if (acm->disconnected) {
973 if (arg & TIOCM_CD)
974 break;
975 else
976 rv = -ENODEV;
977 } else {
978 if (signal_pending(current))
979 rv = -ERESTARTSYS;
980 }
981 } while (!rv);
982
983
984
985 return rv;
986 }
987
988 static int get_serial_usage(struct acm *acm,
989 struct serial_icounter_struct __user *count)
990 {
991 struct serial_icounter_struct icount;
992 int rv = 0;
993
994 memset(&icount, 0, sizeof(icount));
995 icount.dsr = acm->iocount.dsr;
996 icount.rng = acm->iocount.rng;
997 icount.dcd = acm->iocount.dcd;
998 icount.frame = acm->iocount.frame;
999 icount.overrun = acm->iocount.overrun;
1000 icount.parity = acm->iocount.parity;
1001 icount.brk = acm->iocount.brk;
1002
1003 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
1004 rv = -EFAULT;
1005
1006 return rv;
1007 }
1008
1009 static int acm_tty_ioctl(struct tty_struct *tty,
1010 unsigned int cmd, unsigned long arg)
1011 {
1012 struct acm *acm = tty->driver_data;
1013 int rv = -ENOIOCTLCMD;
1014
1015 switch (cmd) {
1016 case TIOCGSERIAL: /* gets serial port data */
1017 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1018 break;
1019 case TIOCSSERIAL:
1020 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1021 break;
1022 case TIOCMIWAIT:
1023 rv = usb_autopm_get_interface(acm->control);
1024 if (rv < 0) {
1025 rv = -EIO;
1026 break;
1027 }
1028 rv = wait_serial_change(acm, arg);
1029 usb_autopm_put_interface(acm->control);
1030 break;
1031 case TIOCGICOUNT:
1032 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1033 break;
1034 }
1035
1036 return rv;
1037 }
1038
1039 static void acm_tty_set_termios(struct tty_struct *tty,
1040 struct ktermios *termios_old)
1041 {
1042 struct acm *acm = tty->driver_data;
1043 struct ktermios *termios = &tty->termios;
1044 struct usb_cdc_line_coding newline;
1045 int newctrl = acm->ctrlout;
1046
1047 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1048 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1049 newline.bParityType = termios->c_cflag & PARENB ?
1050 (termios->c_cflag & PARODD ? 1 : 2) +
1051 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1052 switch (termios->c_cflag & CSIZE) {
1053 case CS5:
1054 newline.bDataBits = 5;
1055 break;
1056 case CS6:
1057 newline.bDataBits = 6;
1058 break;
1059 case CS7:
1060 newline.bDataBits = 7;
1061 break;
1062 case CS8:
1063 default:
1064 newline.bDataBits = 8;
1065 break;
1066 }
1067 /* FIXME: Needs to clear unsupported bits in the termios */
1068 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1069
1070 if (C_BAUD(tty) == B0) {
1071 newline.dwDTERate = acm->line.dwDTERate;
1072 newctrl &= ~ACM_CTRL_DTR;
1073 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1074 newctrl |= ACM_CTRL_DTR;
1075 }
1076
1077 if (newctrl != acm->ctrlout)
1078 acm_set_control(acm, acm->ctrlout = newctrl);
1079
1080 if (memcmp(&acm->line, &newline, sizeof newline)) {
1081 memcpy(&acm->line, &newline, sizeof newline);
1082 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1083 __func__,
1084 le32_to_cpu(newline.dwDTERate),
1085 newline.bCharFormat, newline.bParityType,
1086 newline.bDataBits);
1087 acm_set_line(acm, &acm->line);
1088 }
1089 }
1090
1091 static const struct tty_port_operations acm_port_ops = {
1092 .dtr_rts = acm_port_dtr_rts,
1093 .shutdown = acm_port_shutdown,
1094 .activate = acm_port_activate,
1095 .destruct = acm_port_destruct,
1096 };
1097
1098 /*
1099 * USB probe and disconnect routines.
1100 */
1101
1102 /* Little helpers: write/read buffers free */
1103 static void acm_write_buffers_free(struct acm *acm)
1104 {
1105 int i;
1106 struct acm_wb *wb;
1107 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1108
1109 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1110 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1111 }
1112
1113 static void acm_read_buffers_free(struct acm *acm)
1114 {
1115 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1116 int i;
1117
1118 for (i = 0; i < acm->rx_buflimit; i++)
1119 usb_free_coherent(usb_dev, acm->readsize,
1120 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1121 }
1122
1123 /* Little helper: write buffers allocate */
1124 static int acm_write_buffers_alloc(struct acm *acm)
1125 {
1126 int i;
1127 struct acm_wb *wb;
1128
1129 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1130 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1131 &wb->dmah);
1132 if (!wb->buf) {
1133 while (i != 0) {
1134 --i;
1135 --wb;
1136 usb_free_coherent(acm->dev, acm->writesize,
1137 wb->buf, wb->dmah);
1138 }
1139 return -ENOMEM;
1140 }
1141 }
1142 return 0;
1143 }
1144
1145 static int acm_probe(struct usb_interface *intf,
1146 const struct usb_device_id *id)
1147 {
1148 struct usb_cdc_union_desc *union_header = NULL;
1149 struct usb_cdc_country_functional_desc *cfd = NULL;
1150 unsigned char *buffer = intf->altsetting->extra;
1151 int buflen = intf->altsetting->extralen;
1152 struct usb_interface *control_interface;
1153 struct usb_interface *data_interface;
1154 struct usb_endpoint_descriptor *epctrl = NULL;
1155 struct usb_endpoint_descriptor *epread = NULL;
1156 struct usb_endpoint_descriptor *epwrite = NULL;
1157 struct usb_device *usb_dev = interface_to_usbdev(intf);
1158 struct acm *acm;
1159 int minor;
1160 int ctrlsize, readsize;
1161 u8 *buf;
1162 u8 ac_management_function = 0;
1163 u8 call_management_function = 0;
1164 int call_interface_num = -1;
1165 int data_interface_num = -1;
1166 unsigned long quirks;
1167 int num_rx_buf;
1168 int i;
1169 unsigned int elength = 0;
1170 int combined_interfaces = 0;
1171 struct device *tty_dev;
1172 int rv = -ENOMEM;
1173
1174 /* normal quirks */
1175 quirks = (unsigned long)id->driver_info;
1176
1177 if (quirks == IGNORE_DEVICE)
1178 return -ENODEV;
1179
1180 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1181
1182 /* handle quirks deadly to normal probing*/
1183 if (quirks == NO_UNION_NORMAL) {
1184 data_interface = usb_ifnum_to_if(usb_dev, 1);
1185 control_interface = usb_ifnum_to_if(usb_dev, 0);
1186 /* we would crash */
1187 if (!data_interface || !control_interface)
1188 return -ENODEV;
1189 goto skip_normal_probe;
1190 }
1191
1192 /* normal probing*/
1193 if (!buffer) {
1194 dev_err(&intf->dev, "Weird descriptor references\n");
1195 return -EINVAL;
1196 }
1197
1198 if (!buflen) {
1199 if (intf->cur_altsetting->endpoint &&
1200 intf->cur_altsetting->endpoint->extralen &&
1201 intf->cur_altsetting->endpoint->extra) {
1202 dev_dbg(&intf->dev,
1203 "Seeking extra descriptors on endpoint\n");
1204 buflen = intf->cur_altsetting->endpoint->extralen;
1205 buffer = intf->cur_altsetting->endpoint->extra;
1206 } else {
1207 dev_err(&intf->dev,
1208 "Zero length descriptor references\n");
1209 return -EINVAL;
1210 }
1211 }
1212
1213 while (buflen > 0) {
1214 elength = buffer[0];
1215 if (!elength) {
1216 dev_err(&intf->dev, "skipping garbage byte\n");
1217 elength = 1;
1218 goto next_desc;
1219 }
1220 if (buffer[1] != USB_DT_CS_INTERFACE) {
1221 dev_err(&intf->dev, "skipping garbage\n");
1222 goto next_desc;
1223 }
1224
1225 switch (buffer[2]) {
1226 case USB_CDC_UNION_TYPE: /* we've found it */
1227 if (elength < sizeof(struct usb_cdc_union_desc))
1228 goto next_desc;
1229 if (union_header) {
1230 dev_err(&intf->dev, "More than one "
1231 "union descriptor, skipping ...\n");
1232 goto next_desc;
1233 }
1234 union_header = (struct usb_cdc_union_desc *)buffer;
1235 break;
1236 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1237 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1238 goto next_desc;
1239 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1240 break;
1241 case USB_CDC_HEADER_TYPE: /* maybe check version */
1242 break; /* for now we ignore it */
1243 case USB_CDC_ACM_TYPE:
1244 if (elength < 4)
1245 goto next_desc;
1246 ac_management_function = buffer[3];
1247 break;
1248 case USB_CDC_CALL_MANAGEMENT_TYPE:
1249 if (elength < 5)
1250 goto next_desc;
1251 call_management_function = buffer[3];
1252 call_interface_num = buffer[4];
1253 break;
1254 default:
1255 /*
1256 * there are LOTS more CDC descriptors that
1257 * could legitimately be found here.
1258 */
1259 dev_dbg(&intf->dev, "Ignoring descriptor: "
1260 "type %02x, length %ud\n",
1261 buffer[2], elength);
1262 break;
1263 }
1264 next_desc:
1265 buflen -= elength;
1266 buffer += elength;
1267 }
1268
1269 if (!union_header) {
1270 if (call_interface_num > 0) {
1271 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1272 /* quirks for Droids MuIn LCD */
1273 if (quirks & NO_DATA_INTERFACE)
1274 data_interface = usb_ifnum_to_if(usb_dev, 0);
1275 else
1276 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1277 control_interface = intf;
1278 } else {
1279 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1280 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1281 return -ENODEV;
1282 } else {
1283 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1284 combined_interfaces = 1;
1285 control_interface = data_interface = intf;
1286 goto look_for_collapsed_interface;
1287 }
1288 }
1289 } else {
1290 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1291 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1292 }
1293
1294 if (!control_interface || !data_interface) {
1295 dev_dbg(&intf->dev, "no interfaces\n");
1296 return -ENODEV;
1297 }
1298
1299 if (data_interface_num != call_interface_num)
1300 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1301
1302 if (control_interface == data_interface) {
1303 /* some broken devices designed for windows work this way */
1304 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1305 combined_interfaces = 1;
1306 /* a popular other OS doesn't use it */
1307 quirks |= NO_CAP_LINE;
1308 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1309 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1310 return -EINVAL;
1311 }
1312 look_for_collapsed_interface:
1313 for (i = 0; i < 3; i++) {
1314 struct usb_endpoint_descriptor *ep;
1315 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1316
1317 if (usb_endpoint_is_int_in(ep))
1318 epctrl = ep;
1319 else if (usb_endpoint_is_bulk_out(ep))
1320 epwrite = ep;
1321 else if (usb_endpoint_is_bulk_in(ep))
1322 epread = ep;
1323 else
1324 return -EINVAL;
1325 }
1326 if (!epctrl || !epread || !epwrite)
1327 return -ENODEV;
1328 else
1329 goto made_compressed_probe;
1330 }
1331
1332 skip_normal_probe:
1333
1334 /*workaround for switched interfaces */
1335 if (data_interface->cur_altsetting->desc.bInterfaceClass
1336 != CDC_DATA_INTERFACE_TYPE) {
1337 if (control_interface->cur_altsetting->desc.bInterfaceClass
1338 == CDC_DATA_INTERFACE_TYPE) {
1339 dev_dbg(&intf->dev,
1340 "Your device has switched interfaces.\n");
1341 swap(control_interface, data_interface);
1342 } else {
1343 return -EINVAL;
1344 }
1345 }
1346
1347 /* Accept probe requests only for the control interface */
1348 if (!combined_interfaces && intf != control_interface)
1349 return -ENODEV;
1350
1351 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1352 /* valid in this context */
1353 dev_dbg(&intf->dev, "The data interface isn't available\n");
1354 return -EBUSY;
1355 }
1356
1357
1358 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1359 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1360 return -EINVAL;
1361
1362 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1363 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1364 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1365
1366
1367 /* workaround for switched endpoints */
1368 if (!usb_endpoint_dir_in(epread)) {
1369 /* descriptors are swapped */
1370 dev_dbg(&intf->dev,
1371 "The data interface has switched endpoints\n");
1372 swap(epread, epwrite);
1373 }
1374 made_compressed_probe:
1375 dev_dbg(&intf->dev, "interfaces are valid\n");
1376
1377 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1378 if (acm == NULL)
1379 goto alloc_fail;
1380
1381 minor = acm_alloc_minor(acm);
1382 if (minor < 0) {
1383 dev_err(&intf->dev, "no more free acm devices\n");
1384 kfree(acm);
1385 return -ENODEV;
1386 }
1387
1388 ctrlsize = usb_endpoint_maxp(epctrl);
1389 readsize = usb_endpoint_maxp(epread) *
1390 (quirks == SINGLE_RX_URB ? 1 : 2);
1391 acm->combined_interfaces = combined_interfaces;
1392 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1393 acm->control = control_interface;
1394 acm->data = data_interface;
1395 acm->minor = minor;
1396 acm->dev = usb_dev;
1397 acm->ctrl_caps = ac_management_function;
1398 if (quirks & NO_CAP_LINE)
1399 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1400 acm->ctrlsize = ctrlsize;
1401 acm->readsize = readsize;
1402 acm->rx_buflimit = num_rx_buf;
1403 INIT_WORK(&acm->work, acm_softint);
1404 init_waitqueue_head(&acm->wioctl);
1405 spin_lock_init(&acm->write_lock);
1406 spin_lock_init(&acm->read_lock);
1407 mutex_init(&acm->mutex);
1408 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1409 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1410 if (acm->is_int_ep)
1411 acm->bInterval = epread->bInterval;
1412 tty_port_init(&acm->port);
1413 acm->port.ops = &acm_port_ops;
1414 init_usb_anchor(&acm->delayed);
1415 acm->quirks = quirks;
1416
1417 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1418 if (!buf)
1419 goto alloc_fail2;
1420 acm->ctrl_buffer = buf;
1421
1422 if (acm_write_buffers_alloc(acm) < 0)
1423 goto alloc_fail4;
1424
1425 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1426 if (!acm->ctrlurb)
1427 goto alloc_fail5;
1428
1429 for (i = 0; i < num_rx_buf; i++) {
1430 struct acm_rb *rb = &(acm->read_buffers[i]);
1431 struct urb *urb;
1432
1433 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1434 &rb->dma);
1435 if (!rb->base)
1436 goto alloc_fail6;
1437 rb->index = i;
1438 rb->instance = acm;
1439
1440 urb = usb_alloc_urb(0, GFP_KERNEL);
1441 if (!urb)
1442 goto alloc_fail6;
1443
1444 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1445 urb->transfer_dma = rb->dma;
1446 if (acm->is_int_ep) {
1447 usb_fill_int_urb(urb, acm->dev,
1448 acm->rx_endpoint,
1449 rb->base,
1450 acm->readsize,
1451 acm_read_bulk_callback, rb,
1452 acm->bInterval);
1453 } else {
1454 usb_fill_bulk_urb(urb, acm->dev,
1455 acm->rx_endpoint,
1456 rb->base,
1457 acm->readsize,
1458 acm_read_bulk_callback, rb);
1459 }
1460
1461 acm->read_urbs[i] = urb;
1462 __set_bit(i, &acm->read_urbs_free);
1463 }
1464 for (i = 0; i < ACM_NW; i++) {
1465 struct acm_wb *snd = &(acm->wb[i]);
1466
1467 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1468 if (snd->urb == NULL)
1469 goto alloc_fail7;
1470
1471 if (usb_endpoint_xfer_int(epwrite))
1472 usb_fill_int_urb(snd->urb, usb_dev,
1473 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1474 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1475 else
1476 usb_fill_bulk_urb(snd->urb, usb_dev,
1477 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1478 NULL, acm->writesize, acm_write_bulk, snd);
1479 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1480 if (quirks & SEND_ZERO_PACKET)
1481 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1482 snd->instance = acm;
1483 }
1484
1485 usb_set_intfdata(intf, acm);
1486
1487 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1488 if (i < 0)
1489 goto alloc_fail7;
1490
1491 if (cfd) { /* export the country data */
1492 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1493 if (!acm->country_codes)
1494 goto skip_countries;
1495 acm->country_code_size = cfd->bLength - 4;
1496 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1497 cfd->bLength - 4);
1498 acm->country_rel_date = cfd->iCountryCodeRelDate;
1499
1500 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1501 if (i < 0) {
1502 kfree(acm->country_codes);
1503 acm->country_codes = NULL;
1504 acm->country_code_size = 0;
1505 goto skip_countries;
1506 }
1507
1508 i = device_create_file(&intf->dev,
1509 &dev_attr_iCountryCodeRelDate);
1510 if (i < 0) {
1511 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1512 kfree(acm->country_codes);
1513 acm->country_codes = NULL;
1514 acm->country_code_size = 0;
1515 goto skip_countries;
1516 }
1517 }
1518
1519 skip_countries:
1520 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1521 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1522 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1523 /* works around buggy devices */
1524 epctrl->bInterval ? epctrl->bInterval : 16);
1525 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1526 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1527
1528 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1529
1530 acm->line.dwDTERate = cpu_to_le32(9600);
1531 acm->line.bDataBits = 8;
1532 acm_set_line(acm, &acm->line);
1533
1534 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1535 usb_set_intfdata(data_interface, acm);
1536
1537 usb_get_intf(control_interface);
1538 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1539 &control_interface->dev);
1540 if (IS_ERR(tty_dev)) {
1541 rv = PTR_ERR(tty_dev);
1542 goto alloc_fail8;
1543 }
1544
1545 if (quirks & CLEAR_HALT_CONDITIONS) {
1546 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1547 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1548 }
1549
1550 return 0;
1551 alloc_fail8:
1552 if (acm->country_codes) {
1553 device_remove_file(&acm->control->dev,
1554 &dev_attr_wCountryCodes);
1555 device_remove_file(&acm->control->dev,
1556 &dev_attr_iCountryCodeRelDate);
1557 kfree(acm->country_codes);
1558 }
1559 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1560 alloc_fail7:
1561 usb_set_intfdata(intf, NULL);
1562 for (i = 0; i < ACM_NW; i++)
1563 usb_free_urb(acm->wb[i].urb);
1564 alloc_fail6:
1565 for (i = 0; i < num_rx_buf; i++)
1566 usb_free_urb(acm->read_urbs[i]);
1567 acm_read_buffers_free(acm);
1568 usb_free_urb(acm->ctrlurb);
1569 alloc_fail5:
1570 acm_write_buffers_free(acm);
1571 alloc_fail4:
1572 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1573 alloc_fail2:
1574 acm_release_minor(acm);
1575 kfree(acm);
1576 alloc_fail:
1577 return rv;
1578 }
1579
1580 static void stop_data_traffic(struct acm *acm)
1581 {
1582 int i;
1583
1584 dev_dbg(&acm->control->dev, "%s\n", __func__);
1585
1586 usb_kill_urb(acm->ctrlurb);
1587 for (i = 0; i < ACM_NW; i++)
1588 usb_kill_urb(acm->wb[i].urb);
1589 for (i = 0; i < acm->rx_buflimit; i++)
1590 usb_kill_urb(acm->read_urbs[i]);
1591
1592 cancel_work_sync(&acm->work);
1593 }
1594
1595 static void acm_disconnect(struct usb_interface *intf)
1596 {
1597 struct acm *acm = usb_get_intfdata(intf);
1598 struct usb_device *usb_dev = interface_to_usbdev(intf);
1599 struct tty_struct *tty;
1600 int i;
1601
1602 dev_dbg(&intf->dev, "%s\n", __func__);
1603
1604 /* sibling interface is already cleaning up */
1605 if (!acm)
1606 return;
1607
1608 mutex_lock(&acm->mutex);
1609 acm->disconnected = true;
1610 if (acm->country_codes) {
1611 device_remove_file(&acm->control->dev,
1612 &dev_attr_wCountryCodes);
1613 device_remove_file(&acm->control->dev,
1614 &dev_attr_iCountryCodeRelDate);
1615 }
1616 wake_up_all(&acm->wioctl);
1617 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1618 usb_set_intfdata(acm->control, NULL);
1619 usb_set_intfdata(acm->data, NULL);
1620 mutex_unlock(&acm->mutex);
1621
1622 tty = tty_port_tty_get(&acm->port);
1623 if (tty) {
1624 tty_vhangup(tty);
1625 tty_kref_put(tty);
1626 }
1627
1628 stop_data_traffic(acm);
1629
1630 tty_unregister_device(acm_tty_driver, acm->minor);
1631
1632 usb_free_urb(acm->ctrlurb);
1633 for (i = 0; i < ACM_NW; i++)
1634 usb_free_urb(acm->wb[i].urb);
1635 for (i = 0; i < acm->rx_buflimit; i++)
1636 usb_free_urb(acm->read_urbs[i]);
1637 acm_write_buffers_free(acm);
1638 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1639 acm_read_buffers_free(acm);
1640
1641 if (!acm->combined_interfaces)
1642 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1643 acm->data : acm->control);
1644
1645 tty_port_put(&acm->port);
1646 }
1647
1648 #ifdef CONFIG_PM
1649 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1650 {
1651 struct acm *acm = usb_get_intfdata(intf);
1652 int cnt;
1653
1654 spin_lock_irq(&acm->write_lock);
1655 if (PMSG_IS_AUTO(message)) {
1656 if (acm->transmitting) {
1657 spin_unlock_irq(&acm->write_lock);
1658 return -EBUSY;
1659 }
1660 }
1661 cnt = acm->susp_count++;
1662 spin_unlock_irq(&acm->write_lock);
1663
1664 if (cnt)
1665 return 0;
1666
1667 stop_data_traffic(acm);
1668
1669 return 0;
1670 }
1671
1672 static int acm_resume(struct usb_interface *intf)
1673 {
1674 struct acm *acm = usb_get_intfdata(intf);
1675 struct urb *urb;
1676 int rv = 0;
1677
1678 spin_lock_irq(&acm->write_lock);
1679
1680 if (--acm->susp_count)
1681 goto out;
1682
1683 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1684 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1685
1686 for (;;) {
1687 urb = usb_get_from_anchor(&acm->delayed);
1688 if (!urb)
1689 break;
1690
1691 acm_start_wb(acm, urb->context);
1692 }
1693
1694 /*
1695 * delayed error checking because we must
1696 * do the write path at all cost
1697 */
1698 if (rv < 0)
1699 goto out;
1700
1701 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1702 }
1703 out:
1704 spin_unlock_irq(&acm->write_lock);
1705
1706 return rv;
1707 }
1708
1709 static int acm_reset_resume(struct usb_interface *intf)
1710 {
1711 struct acm *acm = usb_get_intfdata(intf);
1712
1713 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1714 tty_port_tty_hangup(&acm->port, false);
1715
1716 return acm_resume(intf);
1717 }
1718
1719 #endif /* CONFIG_PM */
1720
1721 #define NOKIA_PCSUITE_ACM_INFO(x) \
1722 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1723 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1724 USB_CDC_ACM_PROTO_VENDOR)
1725
1726 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1727 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1728 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1729 USB_CDC_ACM_PROTO_VENDOR)
1730
1731 /*
1732 * USB driver structure.
1733 */
1734
1735 static const struct usb_device_id acm_ids[] = {
1736 /* quirky and broken devices */
1737 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1738 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1739 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1740 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1741 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1743 },
1744 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1746 },
1747 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1749 },
1750 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1752 },
1753 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1755 },
1756 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1757 .driver_info = SINGLE_RX_URB,
1758 },
1759 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1760 .driver_info = SINGLE_RX_URB, /* firmware bug */
1761 },
1762 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1763 .driver_info = SINGLE_RX_URB, /* firmware bug */
1764 },
1765 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1766 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1767 },
1768 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1769 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1770 },
1771 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1772 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1773 },
1774 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1775 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1776 },
1777 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1778 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1779 },
1780 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1781 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1782 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1783 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1784 },
1785 /* Motorola H24 HSPA module: */
1786 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1787 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1789 },
1790 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1792 },
1793 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1795 },
1796 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1798 },
1799 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1801 },
1802 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1804 },
1805 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1806 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1807 },
1808
1809 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1810 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1811 data interface instead of
1812 communications interface.
1813 Maybe we should define a new
1814 quirk for this. */
1815 },
1816 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1817 .driver_info = NO_UNION_NORMAL,
1818 },
1819 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1820 .driver_info = NO_UNION_NORMAL,
1821 },
1822 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1824 },
1825 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1826 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1827 },
1828
1829 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1830 .driver_info = CLEAR_HALT_CONDITIONS,
1831 },
1832
1833 /* Nokia S60 phones expose two ACM channels. The first is
1834 * a modem and is picked up by the standard AT-command
1835 * information below. The second is 'vendor-specific' but
1836 * is treated as a serial device at the S60 end, so we want
1837 * to expose it on Linux too. */
1838 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1839 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1840 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1841 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1842 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1844 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1845 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1847 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1849 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1851 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1853 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1855 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1856 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1857 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1858 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1859 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1860 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1861 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1862 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1863 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1864 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1865 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1866 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1867 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1868 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1869 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1870 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1871 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1872 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1873 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1874 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1875 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1876 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1877 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1878 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1879 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1880 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1881 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1882 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1883 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1884 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1885 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1886 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1887 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1888 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1889 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1890 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1891 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1892 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1893 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1894 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1895 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1896
1897 /* Support for Owen devices */
1898 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1899
1900 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1901
1902 /* Support for Droids MuIn LCD */
1903 { USB_DEVICE(0x04d8, 0x000b),
1904 .driver_info = NO_DATA_INTERFACE,
1905 },
1906
1907 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1908 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1909 .driver_info = IGNORE_DEVICE,
1910 },
1911 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1912 .driver_info = IGNORE_DEVICE,
1913 },
1914 #endif
1915
1916 /*Samsung phone in firmware update mode */
1917 { USB_DEVICE(0x04e8, 0x685d),
1918 .driver_info = IGNORE_DEVICE,
1919 },
1920
1921 /* Exclude Infineon Flash Loader utility */
1922 { USB_DEVICE(0x058b, 0x0041),
1923 .driver_info = IGNORE_DEVICE,
1924 },
1925
1926 /* control interfaces without any protocol set */
1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1928 USB_CDC_PROTO_NONE) },
1929
1930 /* control interfaces with various AT-command sets */
1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1932 USB_CDC_ACM_PROTO_AT_V25TER) },
1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1934 USB_CDC_ACM_PROTO_AT_PCCA101) },
1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1936 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1938 USB_CDC_ACM_PROTO_AT_GSM) },
1939 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1940 USB_CDC_ACM_PROTO_AT_3G) },
1941 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1942 USB_CDC_ACM_PROTO_AT_CDMA) },
1943
1944 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1945 .driver_info = SEND_ZERO_PACKET,
1946 },
1947
1948 { }
1949 };
1950
1951 MODULE_DEVICE_TABLE(usb, acm_ids);
1952
1953 static struct usb_driver acm_driver = {
1954 .name = "cdc_acm",
1955 .probe = acm_probe,
1956 .disconnect = acm_disconnect,
1957 #ifdef CONFIG_PM
1958 .suspend = acm_suspend,
1959 .resume = acm_resume,
1960 .reset_resume = acm_reset_resume,
1961 #endif
1962 .id_table = acm_ids,
1963 #ifdef CONFIG_PM
1964 .supports_autosuspend = 1,
1965 #endif
1966 .disable_hub_initiated_lpm = 1,
1967 };
1968
1969 /*
1970 * TTY driver structures.
1971 */
1972
1973 static const struct tty_operations acm_ops = {
1974 .install = acm_tty_install,
1975 .open = acm_tty_open,
1976 .close = acm_tty_close,
1977 .cleanup = acm_tty_cleanup,
1978 .hangup = acm_tty_hangup,
1979 .write = acm_tty_write,
1980 .put_char = acm_tty_put_char,
1981 .flush_chars = acm_tty_flush_chars,
1982 .write_room = acm_tty_write_room,
1983 .ioctl = acm_tty_ioctl,
1984 .throttle = acm_tty_throttle,
1985 .unthrottle = acm_tty_unthrottle,
1986 .chars_in_buffer = acm_tty_chars_in_buffer,
1987 .break_ctl = acm_tty_break_ctl,
1988 .set_termios = acm_tty_set_termios,
1989 .tiocmget = acm_tty_tiocmget,
1990 .tiocmset = acm_tty_tiocmset,
1991 };
1992
1993 /*
1994 * Init / exit.
1995 */
1996
1997 static int __init acm_init(void)
1998 {
1999 int retval;
2000 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2001 if (!acm_tty_driver)
2002 return -ENOMEM;
2003 acm_tty_driver->driver_name = "acm",
2004 acm_tty_driver->name = "ttyACM",
2005 acm_tty_driver->major = ACM_TTY_MAJOR,
2006 acm_tty_driver->minor_start = 0,
2007 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2008 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2009 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2010 acm_tty_driver->init_termios = tty_std_termios;
2011 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2012 HUPCL | CLOCAL;
2013 tty_set_operations(acm_tty_driver, &acm_ops);
2014
2015 retval = tty_register_driver(acm_tty_driver);
2016 if (retval) {
2017 put_tty_driver(acm_tty_driver);
2018 return retval;
2019 }
2020
2021 retval = usb_register(&acm_driver);
2022 if (retval) {
2023 tty_unregister_driver(acm_tty_driver);
2024 put_tty_driver(acm_tty_driver);
2025 return retval;
2026 }
2027
2028 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2029
2030 return 0;
2031 }
2032
2033 static void __exit acm_exit(void)
2034 {
2035 usb_deregister(&acm_driver);
2036 tty_unregister_driver(acm_tty_driver);
2037 put_tty_driver(acm_tty_driver);
2038 idr_destroy(&acm_minors);
2039 }
2040
2041 module_init(acm_init);
2042 module_exit(acm_exit);
2043
2044 MODULE_AUTHOR(DRIVER_AUTHOR);
2045 MODULE_DESCRIPTION(DRIVER_DESC);
2046 MODULE_LICENSE("GPL");
2047 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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