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ARM: common: edma: Fix xbar mapping
[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/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
57 static struct usb_driver acm_driver;
58 static struct tty_driver *acm_tty_driver;
59 static struct acm *acm_table[ACM_TTY_MINORS];
60
61 static 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 */
71 static 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 */
94 static 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'. */
111 static 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
122 static 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
150 static 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
169 static 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 */
185 static 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
198 static 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 */
222 static 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 }
230 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
231
232 static 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
242 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
243
244 static 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
253 static 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 */
259 static 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 }
341 exit:
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
348 static 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
371 static 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
385 static 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
395 static 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 */
430 static 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
449 static 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
462 static 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
481 error_init_termios:
482 tty_port_put(&acm->port);
483 return retval;
484 }
485
486 static 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
495 static 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 goto error_submit_urb;
522 }
523
524 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
525 if (acm_set_control(acm, acm->ctrlout) < 0 &&
526 (acm->ctrl_caps & USB_CDC_CAP_LINE))
527 goto error_set_control;
528
529 usb_autopm_put_interface(acm->control);
530
531 /*
532 * Unthrottle device in case the TTY was closed while throttled.
533 */
534 spin_lock_irq(&acm->read_lock);
535 acm->throttled = 0;
536 acm->throttle_req = 0;
537 spin_unlock_irq(&acm->read_lock);
538
539 if (acm_submit_read_urbs(acm, GFP_KERNEL))
540 goto error_submit_read_urbs;
541
542 mutex_unlock(&acm->mutex);
543
544 return 0;
545
546 error_submit_read_urbs:
547 acm->ctrlout = 0;
548 acm_set_control(acm, acm->ctrlout);
549 error_set_control:
550 usb_kill_urb(acm->ctrlurb);
551 error_submit_urb:
552 usb_autopm_put_interface(acm->control);
553 error_get_interface:
554 disconnected:
555 mutex_unlock(&acm->mutex);
556 return retval;
557 }
558
559 static void acm_port_destruct(struct tty_port *port)
560 {
561 struct acm *acm = container_of(port, struct acm, port);
562
563 dev_dbg(&acm->control->dev, "%s\n", __func__);
564
565 acm_release_minor(acm);
566 usb_put_intf(acm->control);
567 kfree(acm->country_codes);
568 kfree(acm);
569 }
570
571 static void acm_port_shutdown(struct tty_port *port)
572 {
573 struct acm *acm = container_of(port, struct acm, port);
574 int i;
575
576 dev_dbg(&acm->control->dev, "%s\n", __func__);
577
578 mutex_lock(&acm->mutex);
579 if (!acm->disconnected) {
580 usb_autopm_get_interface(acm->control);
581 acm_set_control(acm, acm->ctrlout = 0);
582 usb_kill_urb(acm->ctrlurb);
583 for (i = 0; i < ACM_NW; i++)
584 usb_kill_urb(acm->wb[i].urb);
585 for (i = 0; i < acm->rx_buflimit; i++)
586 usb_kill_urb(acm->read_urbs[i]);
587 acm->control->needs_remote_wakeup = 0;
588 usb_autopm_put_interface(acm->control);
589 }
590 mutex_unlock(&acm->mutex);
591 }
592
593 static void acm_tty_cleanup(struct tty_struct *tty)
594 {
595 struct acm *acm = tty->driver_data;
596 dev_dbg(&acm->control->dev, "%s\n", __func__);
597 tty_port_put(&acm->port);
598 }
599
600 static void acm_tty_hangup(struct tty_struct *tty)
601 {
602 struct acm *acm = tty->driver_data;
603 dev_dbg(&acm->control->dev, "%s\n", __func__);
604 tty_port_hangup(&acm->port);
605 }
606
607 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
608 {
609 struct acm *acm = tty->driver_data;
610 dev_dbg(&acm->control->dev, "%s\n", __func__);
611 tty_port_close(&acm->port, tty, filp);
612 }
613
614 static int acm_tty_write(struct tty_struct *tty,
615 const unsigned char *buf, int count)
616 {
617 struct acm *acm = tty->driver_data;
618 int stat;
619 unsigned long flags;
620 int wbn;
621 struct acm_wb *wb;
622
623 if (!count)
624 return 0;
625
626 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
627
628 spin_lock_irqsave(&acm->write_lock, flags);
629 wbn = acm_wb_alloc(acm);
630 if (wbn < 0) {
631 spin_unlock_irqrestore(&acm->write_lock, flags);
632 return 0;
633 }
634 wb = &acm->wb[wbn];
635
636 if (!acm->dev) {
637 wb->use = 0;
638 spin_unlock_irqrestore(&acm->write_lock, flags);
639 return -ENODEV;
640 }
641
642 count = (count > acm->writesize) ? acm->writesize : count;
643 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
644 memcpy(wb->buf, buf, count);
645 wb->len = count;
646
647 usb_autopm_get_interface_async(acm->control);
648 if (acm->susp_count) {
649 if (!acm->delayed_wb)
650 acm->delayed_wb = wb;
651 else
652 usb_autopm_put_interface_async(acm->control);
653 spin_unlock_irqrestore(&acm->write_lock, flags);
654 return count; /* A white lie */
655 }
656 usb_mark_last_busy(acm->dev);
657
658 stat = acm_start_wb(acm, wb);
659 spin_unlock_irqrestore(&acm->write_lock, flags);
660
661 if (stat < 0)
662 return stat;
663 return count;
664 }
665
666 static int acm_tty_write_room(struct tty_struct *tty)
667 {
668 struct acm *acm = tty->driver_data;
669 /*
670 * Do not let the line discipline to know that we have a reserve,
671 * or it might get too enthusiastic.
672 */
673 return acm_wb_is_avail(acm) ? acm->writesize : 0;
674 }
675
676 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
677 {
678 struct acm *acm = tty->driver_data;
679 /*
680 * if the device was unplugged then any remaining characters fell out
681 * of the connector ;)
682 */
683 if (acm->disconnected)
684 return 0;
685 /*
686 * This is inaccurate (overcounts), but it works.
687 */
688 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
689 }
690
691 static void acm_tty_throttle(struct tty_struct *tty)
692 {
693 struct acm *acm = tty->driver_data;
694
695 spin_lock_irq(&acm->read_lock);
696 acm->throttle_req = 1;
697 spin_unlock_irq(&acm->read_lock);
698 }
699
700 static void acm_tty_unthrottle(struct tty_struct *tty)
701 {
702 struct acm *acm = tty->driver_data;
703 unsigned int was_throttled;
704
705 spin_lock_irq(&acm->read_lock);
706 was_throttled = acm->throttled;
707 acm->throttled = 0;
708 acm->throttle_req = 0;
709 spin_unlock_irq(&acm->read_lock);
710
711 if (was_throttled)
712 acm_submit_read_urbs(acm, GFP_KERNEL);
713 }
714
715 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
716 {
717 struct acm *acm = tty->driver_data;
718 int retval;
719
720 retval = acm_send_break(acm, state ? 0xffff : 0);
721 if (retval < 0)
722 dev_dbg(&acm->control->dev, "%s - send break failed\n",
723 __func__);
724 return retval;
725 }
726
727 static int acm_tty_tiocmget(struct tty_struct *tty)
728 {
729 struct acm *acm = tty->driver_data;
730
731 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
732 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
733 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
734 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
735 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
736 TIOCM_CTS;
737 }
738
739 static int acm_tty_tiocmset(struct tty_struct *tty,
740 unsigned int set, unsigned int clear)
741 {
742 struct acm *acm = tty->driver_data;
743 unsigned int newctrl;
744
745 newctrl = acm->ctrlout;
746 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
747 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
748 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
749 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
750
751 newctrl = (newctrl & ~clear) | set;
752
753 if (acm->ctrlout == newctrl)
754 return 0;
755 return acm_set_control(acm, acm->ctrlout = newctrl);
756 }
757
758 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
759 {
760 struct serial_struct tmp;
761
762 if (!info)
763 return -EINVAL;
764
765 memset(&tmp, 0, sizeof(tmp));
766 tmp.flags = ASYNC_LOW_LATENCY;
767 tmp.xmit_fifo_size = acm->writesize;
768 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
769 tmp.close_delay = acm->port.close_delay / 10;
770 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
771 ASYNC_CLOSING_WAIT_NONE :
772 acm->port.closing_wait / 10;
773
774 if (copy_to_user(info, &tmp, sizeof(tmp)))
775 return -EFAULT;
776 else
777 return 0;
778 }
779
780 static int set_serial_info(struct acm *acm,
781 struct serial_struct __user *newinfo)
782 {
783 struct serial_struct new_serial;
784 unsigned int closing_wait, close_delay;
785 int retval = 0;
786
787 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
788 return -EFAULT;
789
790 close_delay = new_serial.close_delay * 10;
791 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
792 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
793
794 mutex_lock(&acm->port.mutex);
795
796 if (!capable(CAP_SYS_ADMIN)) {
797 if ((close_delay != acm->port.close_delay) ||
798 (closing_wait != acm->port.closing_wait))
799 retval = -EPERM;
800 else
801 retval = -EOPNOTSUPP;
802 } else {
803 acm->port.close_delay = close_delay;
804 acm->port.closing_wait = closing_wait;
805 }
806
807 mutex_unlock(&acm->port.mutex);
808 return retval;
809 }
810
811 static int wait_serial_change(struct acm *acm, unsigned long arg)
812 {
813 int rv = 0;
814 DECLARE_WAITQUEUE(wait, current);
815 struct async_icount old, new;
816
817 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
818 return -EINVAL;
819 do {
820 spin_lock_irq(&acm->read_lock);
821 old = acm->oldcount;
822 new = acm->iocount;
823 acm->oldcount = new;
824 spin_unlock_irq(&acm->read_lock);
825
826 if ((arg & TIOCM_DSR) &&
827 old.dsr != new.dsr)
828 break;
829 if ((arg & TIOCM_CD) &&
830 old.dcd != new.dcd)
831 break;
832 if ((arg & TIOCM_RI) &&
833 old.rng != new.rng)
834 break;
835
836 add_wait_queue(&acm->wioctl, &wait);
837 set_current_state(TASK_INTERRUPTIBLE);
838 schedule();
839 remove_wait_queue(&acm->wioctl, &wait);
840 if (acm->disconnected) {
841 if (arg & TIOCM_CD)
842 break;
843 else
844 rv = -ENODEV;
845 } else {
846 if (signal_pending(current))
847 rv = -ERESTARTSYS;
848 }
849 } while (!rv);
850
851
852
853 return rv;
854 }
855
856 static int get_serial_usage(struct acm *acm,
857 struct serial_icounter_struct __user *count)
858 {
859 struct serial_icounter_struct icount;
860 int rv = 0;
861
862 memset(&icount, 0, sizeof(icount));
863 icount.dsr = acm->iocount.dsr;
864 icount.rng = acm->iocount.rng;
865 icount.dcd = acm->iocount.dcd;
866 icount.frame = acm->iocount.frame;
867 icount.overrun = acm->iocount.overrun;
868 icount.parity = acm->iocount.parity;
869 icount.brk = acm->iocount.brk;
870
871 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
872 rv = -EFAULT;
873
874 return rv;
875 }
876
877 static int acm_tty_ioctl(struct tty_struct *tty,
878 unsigned int cmd, unsigned long arg)
879 {
880 struct acm *acm = tty->driver_data;
881 int rv = -ENOIOCTLCMD;
882
883 switch (cmd) {
884 case TIOCGSERIAL: /* gets serial port data */
885 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
886 break;
887 case TIOCSSERIAL:
888 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
889 break;
890 case TIOCMIWAIT:
891 rv = usb_autopm_get_interface(acm->control);
892 if (rv < 0) {
893 rv = -EIO;
894 break;
895 }
896 rv = wait_serial_change(acm, arg);
897 usb_autopm_put_interface(acm->control);
898 break;
899 case TIOCGICOUNT:
900 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
901 break;
902 }
903
904 return rv;
905 }
906
907 static void acm_tty_set_termios(struct tty_struct *tty,
908 struct ktermios *termios_old)
909 {
910 struct acm *acm = tty->driver_data;
911 struct ktermios *termios = &tty->termios;
912 struct usb_cdc_line_coding newline;
913 int newctrl = acm->ctrlout;
914
915 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
916 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
917 newline.bParityType = termios->c_cflag & PARENB ?
918 (termios->c_cflag & PARODD ? 1 : 2) +
919 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
920 switch (termios->c_cflag & CSIZE) {
921 case CS5:
922 newline.bDataBits = 5;
923 break;
924 case CS6:
925 newline.bDataBits = 6;
926 break;
927 case CS7:
928 newline.bDataBits = 7;
929 break;
930 case CS8:
931 default:
932 newline.bDataBits = 8;
933 break;
934 }
935 /* FIXME: Needs to clear unsupported bits in the termios */
936 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
937
938 if (!newline.dwDTERate) {
939 newline.dwDTERate = acm->line.dwDTERate;
940 newctrl &= ~ACM_CTRL_DTR;
941 } else
942 newctrl |= ACM_CTRL_DTR;
943
944 if (newctrl != acm->ctrlout)
945 acm_set_control(acm, acm->ctrlout = newctrl);
946
947 if (memcmp(&acm->line, &newline, sizeof newline)) {
948 memcpy(&acm->line, &newline, sizeof newline);
949 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
950 __func__,
951 le32_to_cpu(newline.dwDTERate),
952 newline.bCharFormat, newline.bParityType,
953 newline.bDataBits);
954 acm_set_line(acm, &acm->line);
955 }
956 }
957
958 static const struct tty_port_operations acm_port_ops = {
959 .shutdown = acm_port_shutdown,
960 .activate = acm_port_activate,
961 .destruct = acm_port_destruct,
962 };
963
964 /*
965 * USB probe and disconnect routines.
966 */
967
968 /* Little helpers: write/read buffers free */
969 static void acm_write_buffers_free(struct acm *acm)
970 {
971 int i;
972 struct acm_wb *wb;
973 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
974
975 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
976 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
977 }
978
979 static void acm_read_buffers_free(struct acm *acm)
980 {
981 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
982 int i;
983
984 for (i = 0; i < acm->rx_buflimit; i++)
985 usb_free_coherent(usb_dev, acm->readsize,
986 acm->read_buffers[i].base, acm->read_buffers[i].dma);
987 }
988
989 /* Little helper: write buffers allocate */
990 static int acm_write_buffers_alloc(struct acm *acm)
991 {
992 int i;
993 struct acm_wb *wb;
994
995 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
996 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
997 &wb->dmah);
998 if (!wb->buf) {
999 while (i != 0) {
1000 --i;
1001 --wb;
1002 usb_free_coherent(acm->dev, acm->writesize,
1003 wb->buf, wb->dmah);
1004 }
1005 return -ENOMEM;
1006 }
1007 }
1008 return 0;
1009 }
1010
1011 static int acm_probe(struct usb_interface *intf,
1012 const struct usb_device_id *id)
1013 {
1014 struct usb_cdc_union_desc *union_header = NULL;
1015 struct usb_cdc_country_functional_desc *cfd = NULL;
1016 unsigned char *buffer = intf->altsetting->extra;
1017 int buflen = intf->altsetting->extralen;
1018 struct usb_interface *control_interface;
1019 struct usb_interface *data_interface;
1020 struct usb_endpoint_descriptor *epctrl = NULL;
1021 struct usb_endpoint_descriptor *epread = NULL;
1022 struct usb_endpoint_descriptor *epwrite = NULL;
1023 struct usb_device *usb_dev = interface_to_usbdev(intf);
1024 struct acm *acm;
1025 int minor;
1026 int ctrlsize, readsize;
1027 u8 *buf;
1028 u8 ac_management_function = 0;
1029 u8 call_management_function = 0;
1030 int call_interface_num = -1;
1031 int data_interface_num = -1;
1032 unsigned long quirks;
1033 int num_rx_buf;
1034 int i;
1035 int combined_interfaces = 0;
1036 struct device *tty_dev;
1037 int rv = -ENOMEM;
1038
1039 /* normal quirks */
1040 quirks = (unsigned long)id->driver_info;
1041
1042 if (quirks == IGNORE_DEVICE)
1043 return -ENODEV;
1044
1045 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1046
1047 /* handle quirks deadly to normal probing*/
1048 if (quirks == NO_UNION_NORMAL) {
1049 data_interface = usb_ifnum_to_if(usb_dev, 1);
1050 control_interface = usb_ifnum_to_if(usb_dev, 0);
1051 goto skip_normal_probe;
1052 }
1053
1054 /* normal probing*/
1055 if (!buffer) {
1056 dev_err(&intf->dev, "Weird descriptor references\n");
1057 return -EINVAL;
1058 }
1059
1060 if (!buflen) {
1061 if (intf->cur_altsetting->endpoint &&
1062 intf->cur_altsetting->endpoint->extralen &&
1063 intf->cur_altsetting->endpoint->extra) {
1064 dev_dbg(&intf->dev,
1065 "Seeking extra descriptors on endpoint\n");
1066 buflen = intf->cur_altsetting->endpoint->extralen;
1067 buffer = intf->cur_altsetting->endpoint->extra;
1068 } else {
1069 dev_err(&intf->dev,
1070 "Zero length descriptor references\n");
1071 return -EINVAL;
1072 }
1073 }
1074
1075 while (buflen > 0) {
1076 if (buffer[1] != USB_DT_CS_INTERFACE) {
1077 dev_err(&intf->dev, "skipping garbage\n");
1078 goto next_desc;
1079 }
1080
1081 switch (buffer[2]) {
1082 case USB_CDC_UNION_TYPE: /* we've found it */
1083 if (union_header) {
1084 dev_err(&intf->dev, "More than one "
1085 "union descriptor, skipping ...\n");
1086 goto next_desc;
1087 }
1088 union_header = (struct usb_cdc_union_desc *)buffer;
1089 break;
1090 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1091 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1092 break;
1093 case USB_CDC_HEADER_TYPE: /* maybe check version */
1094 break; /* for now we ignore it */
1095 case USB_CDC_ACM_TYPE:
1096 ac_management_function = buffer[3];
1097 break;
1098 case USB_CDC_CALL_MANAGEMENT_TYPE:
1099 call_management_function = buffer[3];
1100 call_interface_num = buffer[4];
1101 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1102 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1103 break;
1104 default:
1105 /* there are LOTS more CDC descriptors that
1106 * could legitimately be found here.
1107 */
1108 dev_dbg(&intf->dev, "Ignoring descriptor: "
1109 "type %02x, length %d\n",
1110 buffer[2], buffer[0]);
1111 break;
1112 }
1113 next_desc:
1114 buflen -= buffer[0];
1115 buffer += buffer[0];
1116 }
1117
1118 if (!union_header) {
1119 if (call_interface_num > 0) {
1120 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1121 /* quirks for Droids MuIn LCD */
1122 if (quirks & NO_DATA_INTERFACE)
1123 data_interface = usb_ifnum_to_if(usb_dev, 0);
1124 else
1125 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1126 control_interface = intf;
1127 } else {
1128 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1129 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1130 return -ENODEV;
1131 } else {
1132 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1133 combined_interfaces = 1;
1134 control_interface = data_interface = intf;
1135 goto look_for_collapsed_interface;
1136 }
1137 }
1138 } else {
1139 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1140 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1141 if (!control_interface || !data_interface) {
1142 dev_dbg(&intf->dev, "no interfaces\n");
1143 return -ENODEV;
1144 }
1145 }
1146
1147 if (data_interface_num != call_interface_num)
1148 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1149
1150 if (control_interface == data_interface) {
1151 /* some broken devices designed for windows work this way */
1152 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1153 combined_interfaces = 1;
1154 /* a popular other OS doesn't use it */
1155 quirks |= NO_CAP_LINE;
1156 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1157 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1158 return -EINVAL;
1159 }
1160 look_for_collapsed_interface:
1161 for (i = 0; i < 3; i++) {
1162 struct usb_endpoint_descriptor *ep;
1163 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1164
1165 if (usb_endpoint_is_int_in(ep))
1166 epctrl = ep;
1167 else if (usb_endpoint_is_bulk_out(ep))
1168 epwrite = ep;
1169 else if (usb_endpoint_is_bulk_in(ep))
1170 epread = ep;
1171 else
1172 return -EINVAL;
1173 }
1174 if (!epctrl || !epread || !epwrite)
1175 return -ENODEV;
1176 else
1177 goto made_compressed_probe;
1178 }
1179
1180 skip_normal_probe:
1181
1182 /*workaround for switched interfaces */
1183 if (data_interface->cur_altsetting->desc.bInterfaceClass
1184 != CDC_DATA_INTERFACE_TYPE) {
1185 if (control_interface->cur_altsetting->desc.bInterfaceClass
1186 == CDC_DATA_INTERFACE_TYPE) {
1187 struct usb_interface *t;
1188 dev_dbg(&intf->dev,
1189 "Your device has switched interfaces.\n");
1190 t = control_interface;
1191 control_interface = data_interface;
1192 data_interface = t;
1193 } else {
1194 return -EINVAL;
1195 }
1196 }
1197
1198 /* Accept probe requests only for the control interface */
1199 if (!combined_interfaces && intf != control_interface)
1200 return -ENODEV;
1201
1202 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1203 /* valid in this context */
1204 dev_dbg(&intf->dev, "The data interface isn't available\n");
1205 return -EBUSY;
1206 }
1207
1208
1209 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1210 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1211 return -EINVAL;
1212
1213 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1214 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1215 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1216
1217
1218 /* workaround for switched endpoints */
1219 if (!usb_endpoint_dir_in(epread)) {
1220 /* descriptors are swapped */
1221 struct usb_endpoint_descriptor *t;
1222 dev_dbg(&intf->dev,
1223 "The data interface has switched endpoints\n");
1224 t = epread;
1225 epread = epwrite;
1226 epwrite = t;
1227 }
1228 made_compressed_probe:
1229 dev_dbg(&intf->dev, "interfaces are valid\n");
1230
1231 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1232 if (acm == NULL) {
1233 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1234 goto alloc_fail;
1235 }
1236
1237 minor = acm_alloc_minor(acm);
1238 if (minor == ACM_TTY_MINORS) {
1239 dev_err(&intf->dev, "no more free acm devices\n");
1240 kfree(acm);
1241 return -ENODEV;
1242 }
1243
1244 ctrlsize = usb_endpoint_maxp(epctrl);
1245 readsize = usb_endpoint_maxp(epread) *
1246 (quirks == SINGLE_RX_URB ? 1 : 2);
1247 acm->combined_interfaces = combined_interfaces;
1248 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1249 acm->control = control_interface;
1250 acm->data = data_interface;
1251 acm->minor = minor;
1252 acm->dev = usb_dev;
1253 acm->ctrl_caps = ac_management_function;
1254 if (quirks & NO_CAP_LINE)
1255 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1256 acm->ctrlsize = ctrlsize;
1257 acm->readsize = readsize;
1258 acm->rx_buflimit = num_rx_buf;
1259 INIT_WORK(&acm->work, acm_softint);
1260 init_waitqueue_head(&acm->wioctl);
1261 spin_lock_init(&acm->write_lock);
1262 spin_lock_init(&acm->read_lock);
1263 mutex_init(&acm->mutex);
1264 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1265 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1266 if (acm->is_int_ep)
1267 acm->bInterval = epread->bInterval;
1268 tty_port_init(&acm->port);
1269 acm->port.ops = &acm_port_ops;
1270
1271 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1272 if (!buf) {
1273 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1274 goto alloc_fail2;
1275 }
1276 acm->ctrl_buffer = buf;
1277
1278 if (acm_write_buffers_alloc(acm) < 0) {
1279 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1280 goto alloc_fail4;
1281 }
1282
1283 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1284 if (!acm->ctrlurb) {
1285 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1286 goto alloc_fail5;
1287 }
1288 for (i = 0; i < num_rx_buf; i++) {
1289 struct acm_rb *rb = &(acm->read_buffers[i]);
1290 struct urb *urb;
1291
1292 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1293 &rb->dma);
1294 if (!rb->base) {
1295 dev_err(&intf->dev, "out of memory "
1296 "(read bufs usb_alloc_coherent)\n");
1297 goto alloc_fail6;
1298 }
1299 rb->index = i;
1300 rb->instance = acm;
1301
1302 urb = usb_alloc_urb(0, GFP_KERNEL);
1303 if (!urb) {
1304 dev_err(&intf->dev,
1305 "out of memory (read urbs usb_alloc_urb)\n");
1306 goto alloc_fail6;
1307 }
1308 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1309 urb->transfer_dma = rb->dma;
1310 if (acm->is_int_ep) {
1311 usb_fill_int_urb(urb, acm->dev,
1312 acm->rx_endpoint,
1313 rb->base,
1314 acm->readsize,
1315 acm_read_bulk_callback, rb,
1316 acm->bInterval);
1317 } else {
1318 usb_fill_bulk_urb(urb, acm->dev,
1319 acm->rx_endpoint,
1320 rb->base,
1321 acm->readsize,
1322 acm_read_bulk_callback, rb);
1323 }
1324
1325 acm->read_urbs[i] = urb;
1326 __set_bit(i, &acm->read_urbs_free);
1327 }
1328 for (i = 0; i < ACM_NW; i++) {
1329 struct acm_wb *snd = &(acm->wb[i]);
1330
1331 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1332 if (snd->urb == NULL) {
1333 dev_err(&intf->dev,
1334 "out of memory (write urbs usb_alloc_urb)\n");
1335 goto alloc_fail7;
1336 }
1337
1338 if (usb_endpoint_xfer_int(epwrite))
1339 usb_fill_int_urb(snd->urb, usb_dev,
1340 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1341 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1342 else
1343 usb_fill_bulk_urb(snd->urb, usb_dev,
1344 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1345 NULL, acm->writesize, acm_write_bulk, snd);
1346 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1347 snd->instance = acm;
1348 }
1349
1350 usb_set_intfdata(intf, acm);
1351
1352 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1353 if (i < 0)
1354 goto alloc_fail7;
1355
1356 if (cfd) { /* export the country data */
1357 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1358 if (!acm->country_codes)
1359 goto skip_countries;
1360 acm->country_code_size = cfd->bLength - 4;
1361 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1362 cfd->bLength - 4);
1363 acm->country_rel_date = cfd->iCountryCodeRelDate;
1364
1365 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1366 if (i < 0) {
1367 kfree(acm->country_codes);
1368 acm->country_codes = NULL;
1369 acm->country_code_size = 0;
1370 goto skip_countries;
1371 }
1372
1373 i = device_create_file(&intf->dev,
1374 &dev_attr_iCountryCodeRelDate);
1375 if (i < 0) {
1376 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1377 kfree(acm->country_codes);
1378 acm->country_codes = NULL;
1379 acm->country_code_size = 0;
1380 goto skip_countries;
1381 }
1382 }
1383
1384 skip_countries:
1385 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1386 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1387 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1388 /* works around buggy devices */
1389 epctrl->bInterval ? epctrl->bInterval : 16);
1390 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1391 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1392
1393 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1394
1395 acm_set_control(acm, acm->ctrlout);
1396
1397 acm->line.dwDTERate = cpu_to_le32(9600);
1398 acm->line.bDataBits = 8;
1399 acm_set_line(acm, &acm->line);
1400
1401 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1402 usb_set_intfdata(data_interface, acm);
1403
1404 usb_get_intf(control_interface);
1405 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1406 &control_interface->dev);
1407 if (IS_ERR(tty_dev)) {
1408 rv = PTR_ERR(tty_dev);
1409 goto alloc_fail8;
1410 }
1411
1412 return 0;
1413 alloc_fail8:
1414 if (acm->country_codes) {
1415 device_remove_file(&acm->control->dev,
1416 &dev_attr_wCountryCodes);
1417 device_remove_file(&acm->control->dev,
1418 &dev_attr_iCountryCodeRelDate);
1419 }
1420 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1421 alloc_fail7:
1422 usb_set_intfdata(intf, NULL);
1423 for (i = 0; i < ACM_NW; i++)
1424 usb_free_urb(acm->wb[i].urb);
1425 alloc_fail6:
1426 for (i = 0; i < num_rx_buf; i++)
1427 usb_free_urb(acm->read_urbs[i]);
1428 acm_read_buffers_free(acm);
1429 usb_free_urb(acm->ctrlurb);
1430 alloc_fail5:
1431 acm_write_buffers_free(acm);
1432 alloc_fail4:
1433 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1434 alloc_fail2:
1435 acm_release_minor(acm);
1436 kfree(acm);
1437 alloc_fail:
1438 return rv;
1439 }
1440
1441 static void stop_data_traffic(struct acm *acm)
1442 {
1443 int i;
1444
1445 dev_dbg(&acm->control->dev, "%s\n", __func__);
1446
1447 usb_kill_urb(acm->ctrlurb);
1448 for (i = 0; i < ACM_NW; i++)
1449 usb_kill_urb(acm->wb[i].urb);
1450 for (i = 0; i < acm->rx_buflimit; i++)
1451 usb_kill_urb(acm->read_urbs[i]);
1452
1453 cancel_work_sync(&acm->work);
1454 }
1455
1456 static void acm_disconnect(struct usb_interface *intf)
1457 {
1458 struct acm *acm = usb_get_intfdata(intf);
1459 struct usb_device *usb_dev = interface_to_usbdev(intf);
1460 struct tty_struct *tty;
1461 int i;
1462
1463 dev_dbg(&intf->dev, "%s\n", __func__);
1464
1465 /* sibling interface is already cleaning up */
1466 if (!acm)
1467 return;
1468
1469 mutex_lock(&acm->mutex);
1470 acm->disconnected = true;
1471 if (acm->country_codes) {
1472 device_remove_file(&acm->control->dev,
1473 &dev_attr_wCountryCodes);
1474 device_remove_file(&acm->control->dev,
1475 &dev_attr_iCountryCodeRelDate);
1476 }
1477 wake_up_all(&acm->wioctl);
1478 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1479 usb_set_intfdata(acm->control, NULL);
1480 usb_set_intfdata(acm->data, NULL);
1481 mutex_unlock(&acm->mutex);
1482
1483 tty = tty_port_tty_get(&acm->port);
1484 if (tty) {
1485 tty_vhangup(tty);
1486 tty_kref_put(tty);
1487 }
1488
1489 stop_data_traffic(acm);
1490
1491 tty_unregister_device(acm_tty_driver, acm->minor);
1492
1493 usb_free_urb(acm->ctrlurb);
1494 for (i = 0; i < ACM_NW; i++)
1495 usb_free_urb(acm->wb[i].urb);
1496 for (i = 0; i < acm->rx_buflimit; i++)
1497 usb_free_urb(acm->read_urbs[i]);
1498 acm_write_buffers_free(acm);
1499 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1500 acm_read_buffers_free(acm);
1501
1502 if (!acm->combined_interfaces)
1503 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1504 acm->data : acm->control);
1505
1506 tty_port_put(&acm->port);
1507 }
1508
1509 #ifdef CONFIG_PM
1510 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1511 {
1512 struct acm *acm = usb_get_intfdata(intf);
1513 int cnt;
1514
1515 if (PMSG_IS_AUTO(message)) {
1516 int b;
1517
1518 spin_lock_irq(&acm->write_lock);
1519 b = acm->transmitting;
1520 spin_unlock_irq(&acm->write_lock);
1521 if (b)
1522 return -EBUSY;
1523 }
1524
1525 spin_lock_irq(&acm->read_lock);
1526 spin_lock(&acm->write_lock);
1527 cnt = acm->susp_count++;
1528 spin_unlock(&acm->write_lock);
1529 spin_unlock_irq(&acm->read_lock);
1530
1531 if (cnt)
1532 return 0;
1533
1534 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1535 stop_data_traffic(acm);
1536
1537 return 0;
1538 }
1539
1540 static int acm_resume(struct usb_interface *intf)
1541 {
1542 struct acm *acm = usb_get_intfdata(intf);
1543 struct acm_wb *wb;
1544 int rv = 0;
1545 int cnt;
1546
1547 spin_lock_irq(&acm->read_lock);
1548 acm->susp_count -= 1;
1549 cnt = acm->susp_count;
1550 spin_unlock_irq(&acm->read_lock);
1551
1552 if (cnt)
1553 return 0;
1554
1555 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1556 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
1557
1558 spin_lock_irq(&acm->write_lock);
1559 if (acm->delayed_wb) {
1560 wb = acm->delayed_wb;
1561 acm->delayed_wb = NULL;
1562 spin_unlock_irq(&acm->write_lock);
1563 acm_start_wb(acm, wb);
1564 } else {
1565 spin_unlock_irq(&acm->write_lock);
1566 }
1567
1568 /*
1569 * delayed error checking because we must
1570 * do the write path at all cost
1571 */
1572 if (rv < 0)
1573 goto err_out;
1574
1575 rv = acm_submit_read_urbs(acm, GFP_NOIO);
1576 }
1577
1578 err_out:
1579 return rv;
1580 }
1581
1582 static int acm_reset_resume(struct usb_interface *intf)
1583 {
1584 struct acm *acm = usb_get_intfdata(intf);
1585
1586 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1587 tty_port_tty_hangup(&acm->port, false);
1588
1589 return acm_resume(intf);
1590 }
1591
1592 #endif /* CONFIG_PM */
1593
1594 #define NOKIA_PCSUITE_ACM_INFO(x) \
1595 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1596 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1597 USB_CDC_ACM_PROTO_VENDOR)
1598
1599 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1600 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1601 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1602 USB_CDC_ACM_PROTO_VENDOR)
1603
1604 /*
1605 * USB driver structure.
1606 */
1607
1608 static const struct usb_device_id acm_ids[] = {
1609 /* quirky and broken devices */
1610 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1611 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1612 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1613 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1614 },
1615 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1616 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1617 },
1618 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1619 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1620 },
1621 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1622 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1623 },
1624 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1625 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1626 },
1627 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1628 .driver_info = SINGLE_RX_URB,
1629 },
1630 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1631 .driver_info = SINGLE_RX_URB, /* firmware bug */
1632 },
1633 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1634 .driver_info = SINGLE_RX_URB, /* firmware bug */
1635 },
1636 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1637 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1638 },
1639 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1640 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1641 },
1642 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1643 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1644 },
1645 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1646 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1647 },
1648 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1649 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1650 },
1651 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1652 },
1653 /* Motorola H24 HSPA module: */
1654 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1655 { USB_DEVICE(0x22b8, 0x2d92) }, /* modem + diagnostics */
1656 { USB_DEVICE(0x22b8, 0x2d93) }, /* modem + AT port */
1657 { USB_DEVICE(0x22b8, 0x2d95) }, /* modem + AT port + diagnostics */
1658 { USB_DEVICE(0x22b8, 0x2d96) }, /* modem + NMEA */
1659 { USB_DEVICE(0x22b8, 0x2d97) }, /* modem + diagnostics + NMEA */
1660 { USB_DEVICE(0x22b8, 0x2d99) }, /* modem + AT port + NMEA */
1661 { USB_DEVICE(0x22b8, 0x2d9a) }, /* modem + AT port + diagnostics + NMEA */
1662
1663 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1664 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1665 data interface instead of
1666 communications interface.
1667 Maybe we should define a new
1668 quirk for this. */
1669 },
1670 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1671 .driver_info = NO_UNION_NORMAL,
1672 },
1673 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1674 .driver_info = NO_UNION_NORMAL,
1675 },
1676 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1677 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1678 },
1679 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1680 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1681 },
1682
1683 /* Nokia S60 phones expose two ACM channels. The first is
1684 * a modem and is picked up by the standard AT-command
1685 * information below. The second is 'vendor-specific' but
1686 * is treated as a serial device at the S60 end, so we want
1687 * to expose it on Linux too. */
1688 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1689 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1690 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1691 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1692 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1693 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1694 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1695 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1696 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1697 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1698 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1699 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1700 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1701 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1702 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1703 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1704 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1705 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1706 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1707 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1708 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1709 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1710 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1711 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1712 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1713 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1714 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1715 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1716 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1717 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1718 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1719 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1720 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1721 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1722 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1723 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1724 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1725 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1727 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1728 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1730 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1735 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1737 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1739 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1740 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1741 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1743 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1744 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1745 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1746
1747 /* Support for Owen devices */
1748 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1749
1750 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1751
1752 /* Support Lego NXT using pbLua firmware */
1753 { USB_DEVICE(0x0694, 0xff00),
1754 .driver_info = NOT_A_MODEM,
1755 },
1756
1757 /* Support for Droids MuIn LCD */
1758 { USB_DEVICE(0x04d8, 0x000b),
1759 .driver_info = NO_DATA_INTERFACE,
1760 },
1761
1762 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1763 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1764 .driver_info = IGNORE_DEVICE,
1765 },
1766 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1767 .driver_info = IGNORE_DEVICE,
1768 },
1769 #endif
1770
1771 /* control interfaces without any protocol set */
1772 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1773 USB_CDC_PROTO_NONE) },
1774
1775 /* control interfaces with various AT-command sets */
1776 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1777 USB_CDC_ACM_PROTO_AT_V25TER) },
1778 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1779 USB_CDC_ACM_PROTO_AT_PCCA101) },
1780 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1781 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1782 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1783 USB_CDC_ACM_PROTO_AT_GSM) },
1784 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1785 USB_CDC_ACM_PROTO_AT_3G) },
1786 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1787 USB_CDC_ACM_PROTO_AT_CDMA) },
1788
1789 { }
1790 };
1791
1792 MODULE_DEVICE_TABLE(usb, acm_ids);
1793
1794 static struct usb_driver acm_driver = {
1795 .name = "cdc_acm",
1796 .probe = acm_probe,
1797 .disconnect = acm_disconnect,
1798 #ifdef CONFIG_PM
1799 .suspend = acm_suspend,
1800 .resume = acm_resume,
1801 .reset_resume = acm_reset_resume,
1802 #endif
1803 .id_table = acm_ids,
1804 #ifdef CONFIG_PM
1805 .supports_autosuspend = 1,
1806 #endif
1807 .disable_hub_initiated_lpm = 1,
1808 };
1809
1810 /*
1811 * TTY driver structures.
1812 */
1813
1814 static const struct tty_operations acm_ops = {
1815 .install = acm_tty_install,
1816 .open = acm_tty_open,
1817 .close = acm_tty_close,
1818 .cleanup = acm_tty_cleanup,
1819 .hangup = acm_tty_hangup,
1820 .write = acm_tty_write,
1821 .write_room = acm_tty_write_room,
1822 .ioctl = acm_tty_ioctl,
1823 .throttle = acm_tty_throttle,
1824 .unthrottle = acm_tty_unthrottle,
1825 .chars_in_buffer = acm_tty_chars_in_buffer,
1826 .break_ctl = acm_tty_break_ctl,
1827 .set_termios = acm_tty_set_termios,
1828 .tiocmget = acm_tty_tiocmget,
1829 .tiocmset = acm_tty_tiocmset,
1830 };
1831
1832 /*
1833 * Init / exit.
1834 */
1835
1836 static int __init acm_init(void)
1837 {
1838 int retval;
1839 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1840 if (!acm_tty_driver)
1841 return -ENOMEM;
1842 acm_tty_driver->driver_name = "acm",
1843 acm_tty_driver->name = "ttyACM",
1844 acm_tty_driver->major = ACM_TTY_MAJOR,
1845 acm_tty_driver->minor_start = 0,
1846 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1847 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1848 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1849 acm_tty_driver->init_termios = tty_std_termios;
1850 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1851 HUPCL | CLOCAL;
1852 tty_set_operations(acm_tty_driver, &acm_ops);
1853
1854 retval = tty_register_driver(acm_tty_driver);
1855 if (retval) {
1856 put_tty_driver(acm_tty_driver);
1857 return retval;
1858 }
1859
1860 retval = usb_register(&acm_driver);
1861 if (retval) {
1862 tty_unregister_driver(acm_tty_driver);
1863 put_tty_driver(acm_tty_driver);
1864 return retval;
1865 }
1866
1867 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1868
1869 return 0;
1870 }
1871
1872 static void __exit acm_exit(void)
1873 {
1874 usb_deregister(&acm_driver);
1875 tty_unregister_driver(acm_tty_driver);
1876 put_tty_driver(acm_tty_driver);
1877 }
1878
1879 module_init(acm_init);
1880 module_exit(acm_exit);
1881
1882 MODULE_AUTHOR(DRIVER_AUTHOR);
1883 MODULE_DESCRIPTION(DRIVER_DESC);
1884 MODULE_LICENSE("GPL");
1885 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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