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18#undef DEBUG
19#undef VERBOSE_DEBUG
20
21#include <linux/kernel.h>
22#include <linux/sched/signal.h>
23#include <linux/errno.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/log2.h>
27#include <linux/tty.h>
28#include <linux/serial.h>
29#include <linux/tty_driver.h>
30#include <linux/tty_flip.h>
31#include <linux/module.h>
32#include <linux/mutex.h>
33#include <linux/uaccess.h>
34#include <linux/usb.h>
35#include <linux/usb/cdc.h>
36#include <asm/byteorder.h>
37#include <asm/unaligned.h>
38#include <linux/idr.h>
39#include <linux/list.h>
40
41#include "cdc-acm.h"
42
43
44#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
45#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
46
47static struct usb_driver acm_driver;
48static struct tty_driver *acm_tty_driver;
49
50static DEFINE_IDR(acm_minors);
51static DEFINE_MUTEX(acm_minors_lock);
52
53static void acm_tty_set_termios(struct tty_struct *tty,
54 struct ktermios *termios_old);
55
56
57
58
59
60
61
62
63
64static struct acm *acm_get_by_minor(unsigned int minor)
65{
66 struct acm *acm;
67
68 mutex_lock(&acm_minors_lock);
69 acm = idr_find(&acm_minors, minor);
70 if (acm) {
71 mutex_lock(&acm->mutex);
72 if (acm->disconnected) {
73 mutex_unlock(&acm->mutex);
74 acm = NULL;
75 } else {
76 tty_port_get(&acm->port);
77 mutex_unlock(&acm->mutex);
78 }
79 }
80 mutex_unlock(&acm_minors_lock);
81 return acm;
82}
83
84
85
86
87static int acm_alloc_minor(struct acm *acm)
88{
89 int minor;
90
91 mutex_lock(&acm_minors_lock);
92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
93 mutex_unlock(&acm_minors_lock);
94
95 return minor;
96}
97
98
99static void acm_release_minor(struct acm *acm)
100{
101 mutex_lock(&acm_minors_lock);
102 idr_remove(&acm_minors, acm->minor);
103 mutex_unlock(&acm_minors_lock);
104}
105
106
107
108
109
110static int acm_ctrl_msg(struct acm *acm, int request, int value,
111 void *buf, int len)
112{
113 int retval;
114
115 retval = usb_autopm_get_interface(acm->control);
116 if (retval)
117 return retval;
118
119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
120 request, USB_RT_ACM, value,
121 acm->control->altsetting[0].desc.bInterfaceNumber,
122 buf, len, 5000);
123
124 dev_dbg(&acm->control->dev,
125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
126 __func__, request, value, len, retval);
127
128 usb_autopm_put_interface(acm->control);
129
130 return retval < 0 ? retval : 0;
131}
132
133
134
135
136static inline int acm_set_control(struct acm *acm, int control)
137{
138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
139 return -EOPNOTSUPP;
140
141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
142 control, NULL, 0);
143}
144
145#define acm_set_line(acm, line) \
146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
147#define acm_send_break(acm, ms) \
148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
149
150static void acm_poison_urbs(struct acm *acm)
151{
152 int i;
153
154 usb_poison_urb(acm->ctrlurb);
155 for (i = 0; i < ACM_NW; i++)
156 usb_poison_urb(acm->wb[i].urb);
157 for (i = 0; i < acm->rx_buflimit; i++)
158 usb_poison_urb(acm->read_urbs[i]);
159}
160
161static void acm_unpoison_urbs(struct acm *acm)
162{
163 int i;
164
165 for (i = 0; i < acm->rx_buflimit; i++)
166 usb_unpoison_urb(acm->read_urbs[i]);
167 for (i = 0; i < ACM_NW; i++)
168 usb_unpoison_urb(acm->wb[i].urb);
169 usb_unpoison_urb(acm->ctrlurb);
170}
171
172
173
174
175
176
177
178static int acm_wb_alloc(struct acm *acm)
179{
180 int i, wbn;
181 struct acm_wb *wb;
182
183 wbn = 0;
184 i = 0;
185 for (;;) {
186 wb = &acm->wb[wbn];
187 if (!wb->use) {
188 wb->use = true;
189 wb->len = 0;
190 return wbn;
191 }
192 wbn = (wbn + 1) % ACM_NW;
193 if (++i >= ACM_NW)
194 return -1;
195 }
196}
197
198static int acm_wb_is_avail(struct acm *acm)
199{
200 int i, n;
201 unsigned long flags;
202
203 n = ACM_NW;
204 spin_lock_irqsave(&acm->write_lock, flags);
205 for (i = 0; i < ACM_NW; i++)
206 if(acm->wb[i].use)
207 n--;
208 spin_unlock_irqrestore(&acm->write_lock, flags);
209 return n;
210}
211
212
213
214
215static void acm_write_done(struct acm *acm, struct acm_wb *wb)
216{
217 wb->use = false;
218 acm->transmitting--;
219 usb_autopm_put_interface_async(acm->control);
220}
221
222
223
224
225
226
227
228static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
229{
230 int rc;
231
232 acm->transmitting++;
233
234 wb->urb->transfer_buffer = wb->buf;
235 wb->urb->transfer_dma = wb->dmah;
236 wb->urb->transfer_buffer_length = wb->len;
237 wb->urb->dev = acm->dev;
238
239 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
240 if (rc < 0) {
241 if (rc != -EPERM)
242 dev_err(&acm->data->dev,
243 "%s - usb_submit_urb(write bulk) failed: %d\n",
244 __func__, rc);
245 acm_write_done(acm, wb);
246 }
247 return rc;
248}
249
250
251
252
253static ssize_t bmCapabilities_show
254(struct device *dev, struct device_attribute *attr, char *buf)
255{
256 struct usb_interface *intf = to_usb_interface(dev);
257 struct acm *acm = usb_get_intfdata(intf);
258
259 return sprintf(buf, "%d", acm->ctrl_caps);
260}
261static DEVICE_ATTR_RO(bmCapabilities);
262
263static ssize_t wCountryCodes_show
264(struct device *dev, struct device_attribute *attr, char *buf)
265{
266 struct usb_interface *intf = to_usb_interface(dev);
267 struct acm *acm = usb_get_intfdata(intf);
268
269 memcpy(buf, acm->country_codes, acm->country_code_size);
270 return acm->country_code_size;
271}
272
273static DEVICE_ATTR_RO(wCountryCodes);
274
275static ssize_t iCountryCodeRelDate_show
276(struct device *dev, struct device_attribute *attr, char *buf)
277{
278 struct usb_interface *intf = to_usb_interface(dev);
279 struct acm *acm = usb_get_intfdata(intf);
280
281 return sprintf(buf, "%d", acm->country_rel_date);
282}
283
284static DEVICE_ATTR_RO(iCountryCodeRelDate);
285
286
287
288
289static void acm_process_notification(struct acm *acm, unsigned char *buf)
290{
291 int newctrl;
292 int difference;
293 unsigned long flags;
294 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
295 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
296
297 switch (dr->bNotificationType) {
298 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
299 dev_dbg(&acm->control->dev,
300 "%s - network connection: %d\n", __func__, dr->wValue);
301 break;
302
303 case USB_CDC_NOTIFY_SERIAL_STATE:
304 if (le16_to_cpu(dr->wLength) != 2) {
305 dev_dbg(&acm->control->dev,
306 "%s - malformed serial state\n", __func__);
307 break;
308 }
309
310 newctrl = get_unaligned_le16(data);
311 dev_dbg(&acm->control->dev,
312 "%s - serial state: 0x%x\n", __func__, newctrl);
313
314 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
315 dev_dbg(&acm->control->dev,
316 "%s - calling hangup\n", __func__);
317 tty_port_tty_hangup(&acm->port, false);
318 }
319
320 difference = acm->ctrlin ^ newctrl;
321 spin_lock_irqsave(&acm->read_lock, flags);
322 acm->ctrlin = newctrl;
323 acm->oldcount = acm->iocount;
324
325 if (difference & ACM_CTRL_DSR)
326 acm->iocount.dsr++;
327 if (difference & ACM_CTRL_DCD)
328 acm->iocount.dcd++;
329 if (newctrl & ACM_CTRL_BRK) {
330 acm->iocount.brk++;
331 tty_insert_flip_char(&acm->port, 0, TTY_BREAK);
332 }
333 if (newctrl & ACM_CTRL_RI)
334 acm->iocount.rng++;
335 if (newctrl & ACM_CTRL_FRAMING)
336 acm->iocount.frame++;
337 if (newctrl & ACM_CTRL_PARITY)
338 acm->iocount.parity++;
339 if (newctrl & ACM_CTRL_OVERRUN)
340 acm->iocount.overrun++;
341 spin_unlock_irqrestore(&acm->read_lock, flags);
342
343 if (newctrl & ACM_CTRL_BRK)
344 tty_flip_buffer_push(&acm->port);
345
346 if (difference)
347 wake_up_all(&acm->wioctl);
348
349 break;
350
351 default:
352 dev_dbg(&acm->control->dev,
353 "%s - unknown notification %d received: index %d len %d\n",
354 __func__,
355 dr->bNotificationType, dr->wIndex, dr->wLength);
356 }
357}
358
359
360static void acm_ctrl_irq(struct urb *urb)
361{
362 struct acm *acm = urb->context;
363 struct usb_cdc_notification *dr = urb->transfer_buffer;
364 unsigned int current_size = urb->actual_length;
365 unsigned int expected_size, copy_size, alloc_size;
366 int retval;
367 int status = urb->status;
368
369 switch (status) {
370 case 0:
371
372 break;
373 case -ECONNRESET:
374 case -ENOENT:
375 case -ESHUTDOWN:
376
377 dev_dbg(&acm->control->dev,
378 "%s - urb shutting down with status: %d\n",
379 __func__, status);
380 return;
381 default:
382 dev_dbg(&acm->control->dev,
383 "%s - nonzero urb status received: %d\n",
384 __func__, status);
385 goto exit;
386 }
387
388 usb_mark_last_busy(acm->dev);
389
390 if (acm->nb_index)
391 dr = (struct usb_cdc_notification *)acm->notification_buffer;
392
393
394 expected_size = sizeof(struct usb_cdc_notification) +
395 le16_to_cpu(dr->wLength);
396
397 if (current_size < expected_size) {
398
399 if (acm->nb_size < expected_size) {
400 u8 *new_buffer;
401 alloc_size = roundup_pow_of_two(expected_size);
402
403 new_buffer = krealloc(acm->notification_buffer,
404 alloc_size, GFP_ATOMIC);
405 if (!new_buffer) {
406 acm->nb_index = 0;
407 goto exit;
408 }
409
410 acm->notification_buffer = new_buffer;
411 acm->nb_size = alloc_size;
412 dr = (struct usb_cdc_notification *)acm->notification_buffer;
413 }
414
415 copy_size = min(current_size,
416 expected_size - acm->nb_index);
417
418 memcpy(&acm->notification_buffer[acm->nb_index],
419 urb->transfer_buffer, copy_size);
420 acm->nb_index += copy_size;
421 current_size = acm->nb_index;
422 }
423
424 if (current_size >= expected_size) {
425
426 acm_process_notification(acm, (unsigned char *)dr);
427 acm->nb_index = 0;
428 }
429
430exit:
431 retval = usb_submit_urb(urb, GFP_ATOMIC);
432 if (retval && retval != -EPERM && retval != -ENODEV)
433 dev_err(&acm->control->dev,
434 "%s - usb_submit_urb failed: %d\n", __func__, retval);
435 else
436 dev_vdbg(&acm->control->dev,
437 "control resubmission terminated %d\n", retval);
438}
439
440static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
441{
442 int res;
443
444 if (!test_and_clear_bit(index, &acm->read_urbs_free))
445 return 0;
446
447 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
448 if (res) {
449 if (res != -EPERM && res != -ENODEV) {
450 dev_err(&acm->data->dev,
451 "urb %d failed submission with %d\n",
452 index, res);
453 } else {
454 dev_vdbg(&acm->data->dev, "intended failure %d\n", res);
455 }
456 set_bit(index, &acm->read_urbs_free);
457 return res;
458 } else {
459 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
460 }
461
462 return 0;
463}
464
465static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
466{
467 int res;
468 int i;
469
470 for (i = 0; i < acm->rx_buflimit; ++i) {
471 res = acm_submit_read_urb(acm, i, mem_flags);
472 if (res)
473 return res;
474 }
475
476 return 0;
477}
478
479static void acm_process_read_urb(struct acm *acm, struct urb *urb)
480{
481 unsigned long flags;
482
483 if (!urb->actual_length)
484 return;
485
486 spin_lock_irqsave(&acm->read_lock, flags);
487 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
488 urb->actual_length);
489 spin_unlock_irqrestore(&acm->read_lock, flags);
490
491 tty_flip_buffer_push(&acm->port);
492}
493
494static void acm_read_bulk_callback(struct urb *urb)
495{
496 struct acm_rb *rb = urb->context;
497 struct acm *acm = rb->instance;
498 int status = urb->status;
499 bool stopped = false;
500 bool stalled = false;
501 bool cooldown = false;
502
503 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
504 rb->index, urb->actual_length, status);
505
506 switch (status) {
507 case 0:
508 usb_mark_last_busy(acm->dev);
509 acm_process_read_urb(acm, urb);
510 break;
511 case -EPIPE:
512 set_bit(EVENT_RX_STALL, &acm->flags);
513 stalled = true;
514 break;
515 case -ENOENT:
516 case -ECONNRESET:
517 case -ESHUTDOWN:
518 dev_dbg(&acm->data->dev,
519 "%s - urb shutting down with status: %d\n",
520 __func__, status);
521 stopped = true;
522 break;
523 case -EOVERFLOW:
524 case -EPROTO:
525 dev_dbg(&acm->data->dev,
526 "%s - cooling babbling device\n", __func__);
527 usb_mark_last_busy(acm->dev);
528 set_bit(rb->index, &acm->urbs_in_error_delay);
529 set_bit(ACM_ERROR_DELAY, &acm->flags);
530 cooldown = true;
531 break;
532 default:
533 dev_dbg(&acm->data->dev,
534 "%s - nonzero urb status received: %d\n",
535 __func__, status);
536 break;
537 }
538
539
540
541
542
543
544 smp_mb__before_atomic();
545 set_bit(rb->index, &acm->read_urbs_free);
546
547
548
549
550
551 smp_mb__after_atomic();
552
553 if (stopped || stalled || cooldown) {
554 if (stalled)
555 schedule_delayed_work(&acm->dwork, 0);
556 else if (cooldown)
557 schedule_delayed_work(&acm->dwork, HZ / 2);
558 return;
559 }
560
561 if (test_bit(ACM_THROTTLED, &acm->flags))
562 return;
563
564 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
565}
566
567
568static void acm_write_bulk(struct urb *urb)
569{
570 struct acm_wb *wb = urb->context;
571 struct acm *acm = wb->instance;
572 unsigned long flags;
573 int status = urb->status;
574
575 if (status || (urb->actual_length != urb->transfer_buffer_length))
576 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
577 urb->actual_length,
578 urb->transfer_buffer_length,
579 status);
580
581 spin_lock_irqsave(&acm->write_lock, flags);
582 acm_write_done(acm, wb);
583 spin_unlock_irqrestore(&acm->write_lock, flags);
584 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
585 schedule_delayed_work(&acm->dwork, 0);
586}
587
588static void acm_softint(struct work_struct *work)
589{
590 int i;
591 struct acm *acm = container_of(work, struct acm, dwork.work);
592
593 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
594 smp_mb();
595 if (!acm->susp_count) {
596 for (i = 0; i < acm->rx_buflimit; i++)
597 usb_kill_urb(acm->read_urbs[i]);
598 usb_clear_halt(acm->dev, acm->in);
599 acm_submit_read_urbs(acm, GFP_KERNEL);
600 clear_bit(EVENT_RX_STALL, &acm->flags);
601 }
602 }
603
604 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {
605 for (i = 0; i < acm->rx_buflimit; i++)
606 if (test_and_clear_bit(i, &acm->urbs_in_error_delay))
607 acm_submit_read_urb(acm, i, GFP_KERNEL);
608 }
609
610 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
611 tty_port_tty_wakeup(&acm->port);
612}
613
614
615
616
617
618static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
619{
620 struct acm *acm;
621 int retval;
622
623 acm = acm_get_by_minor(tty->index);
624 if (!acm)
625 return -ENODEV;
626
627 retval = tty_standard_install(driver, tty);
628 if (retval)
629 goto error_init_termios;
630
631
632
633
634
635 if (acm->quirks & DISABLE_ECHO)
636 tty->termios.c_lflag &= ~ECHO;
637
638 tty->driver_data = acm;
639
640 return 0;
641
642error_init_termios:
643 tty_port_put(&acm->port);
644 return retval;
645}
646
647static int acm_tty_open(struct tty_struct *tty, struct file *filp)
648{
649 struct acm *acm = tty->driver_data;
650
651 return tty_port_open(&acm->port, tty, filp);
652}
653
654static void acm_port_dtr_rts(struct tty_port *port, int raise)
655{
656 struct acm *acm = container_of(port, struct acm, port);
657 int val;
658 int res;
659
660 if (raise)
661 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
662 else
663 val = 0;
664
665
666 acm->ctrlout = val;
667
668 res = acm_set_control(acm, val);
669 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
670
671 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n");
672}
673
674static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
675{
676 struct acm *acm = container_of(port, struct acm, port);
677 int retval = -ENODEV;
678 int i;
679
680 mutex_lock(&acm->mutex);
681 if (acm->disconnected)
682 goto disconnected;
683
684 retval = usb_autopm_get_interface(acm->control);
685 if (retval)
686 goto error_get_interface;
687
688 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
689 acm->control->needs_remote_wakeup = 1;
690
691 acm->ctrlurb->dev = acm->dev;
692 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
693 if (retval) {
694 dev_err(&acm->control->dev,
695 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
696 goto error_submit_urb;
697 }
698
699 acm_tty_set_termios(tty, NULL);
700
701
702
703
704 clear_bit(ACM_THROTTLED, &acm->flags);
705
706 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
707 if (retval)
708 goto error_submit_read_urbs;
709
710 usb_autopm_put_interface(acm->control);
711
712 mutex_unlock(&acm->mutex);
713
714 return 0;
715
716error_submit_read_urbs:
717 for (i = 0; i < acm->rx_buflimit; i++)
718 usb_kill_urb(acm->read_urbs[i]);
719 usb_kill_urb(acm->ctrlurb);
720error_submit_urb:
721 usb_autopm_put_interface(acm->control);
722error_get_interface:
723disconnected:
724 mutex_unlock(&acm->mutex);
725
726 return usb_translate_errors(retval);
727}
728
729static void acm_port_destruct(struct tty_port *port)
730{
731 struct acm *acm = container_of(port, struct acm, port);
732
733 if (acm->minor != ACM_MINOR_INVALID)
734 acm_release_minor(acm);
735 usb_put_intf(acm->control);
736 kfree(acm->country_codes);
737 kfree(acm);
738}
739
740static void acm_port_shutdown(struct tty_port *port)
741{
742 struct acm *acm = container_of(port, struct acm, port);
743 struct urb *urb;
744 struct acm_wb *wb;
745
746
747
748
749
750 acm_poison_urbs(acm);
751 spin_lock_irq(&acm->write_lock);
752 spin_unlock_irq(&acm->write_lock);
753
754 usb_autopm_get_interface_no_resume(acm->control);
755 acm->control->needs_remote_wakeup = 0;
756 usb_autopm_put_interface(acm->control);
757
758 for (;;) {
759 urb = usb_get_from_anchor(&acm->delayed);
760 if (!urb)
761 break;
762 wb = urb->context;
763 wb->use = false;
764 usb_autopm_put_interface_async(acm->control);
765 }
766
767 acm_unpoison_urbs(acm);
768
769}
770
771static void acm_tty_cleanup(struct tty_struct *tty)
772{
773 struct acm *acm = tty->driver_data;
774
775 tty_port_put(&acm->port);
776}
777
778static void acm_tty_hangup(struct tty_struct *tty)
779{
780 struct acm *acm = tty->driver_data;
781
782 tty_port_hangup(&acm->port);
783}
784
785static void acm_tty_close(struct tty_struct *tty, struct file *filp)
786{
787 struct acm *acm = tty->driver_data;
788
789 tty_port_close(&acm->port, tty, filp);
790}
791
792static int acm_tty_write(struct tty_struct *tty,
793 const unsigned char *buf, int count)
794{
795 struct acm *acm = tty->driver_data;
796 int stat;
797 unsigned long flags;
798 int wbn;
799 struct acm_wb *wb;
800
801 if (!count)
802 return 0;
803
804 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
805
806 spin_lock_irqsave(&acm->write_lock, flags);
807 wbn = acm_wb_alloc(acm);
808 if (wbn < 0) {
809 spin_unlock_irqrestore(&acm->write_lock, flags);
810 return 0;
811 }
812 wb = &acm->wb[wbn];
813
814 if (!acm->dev) {
815 wb->use = false;
816 spin_unlock_irqrestore(&acm->write_lock, flags);
817 return -ENODEV;
818 }
819
820 count = (count > acm->writesize) ? acm->writesize : count;
821 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
822 memcpy(wb->buf, buf, count);
823 wb->len = count;
824
825 stat = usb_autopm_get_interface_async(acm->control);
826 if (stat) {
827 wb->use = false;
828 spin_unlock_irqrestore(&acm->write_lock, flags);
829 return stat;
830 }
831
832 if (acm->susp_count) {
833 usb_anchor_urb(wb->urb, &acm->delayed);
834 spin_unlock_irqrestore(&acm->write_lock, flags);
835 return count;
836 }
837
838 stat = acm_start_wb(acm, wb);
839 spin_unlock_irqrestore(&acm->write_lock, flags);
840
841 if (stat < 0)
842 return stat;
843 return count;
844}
845
846static unsigned int acm_tty_write_room(struct tty_struct *tty)
847{
848 struct acm *acm = tty->driver_data;
849
850
851
852
853 return acm_wb_is_avail(acm) ? acm->writesize : 0;
854}
855
856static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty)
857{
858 struct acm *acm = tty->driver_data;
859
860
861
862
863 if (acm->disconnected)
864 return 0;
865
866
867
868 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
869}
870
871static void acm_tty_throttle(struct tty_struct *tty)
872{
873 struct acm *acm = tty->driver_data;
874
875 set_bit(ACM_THROTTLED, &acm->flags);
876}
877
878static void acm_tty_unthrottle(struct tty_struct *tty)
879{
880 struct acm *acm = tty->driver_data;
881
882 clear_bit(ACM_THROTTLED, &acm->flags);
883
884
885 smp_mb();
886
887 acm_submit_read_urbs(acm, GFP_KERNEL);
888}
889
890static int acm_tty_break_ctl(struct tty_struct *tty, int state)
891{
892 struct acm *acm = tty->driver_data;
893 int retval;
894
895 retval = acm_send_break(acm, state ? 0xffff : 0);
896 if (retval < 0)
897 dev_dbg(&acm->control->dev,
898 "%s - send break failed\n", __func__);
899 return retval;
900}
901
902static int acm_tty_tiocmget(struct tty_struct *tty)
903{
904 struct acm *acm = tty->driver_data;
905
906 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
907 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
908 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
909 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
910 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
911 TIOCM_CTS;
912}
913
914static int acm_tty_tiocmset(struct tty_struct *tty,
915 unsigned int set, unsigned int clear)
916{
917 struct acm *acm = tty->driver_data;
918 unsigned int newctrl;
919
920 newctrl = acm->ctrlout;
921 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
922 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
923 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
924 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
925
926 newctrl = (newctrl & ~clear) | set;
927
928 if (acm->ctrlout == newctrl)
929 return 0;
930 return acm_set_control(acm, acm->ctrlout = newctrl);
931}
932
933static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
934{
935 struct acm *acm = tty->driver_data;
936
937 ss->line = acm->minor;
938 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
939 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
940 ASYNC_CLOSING_WAIT_NONE :
941 jiffies_to_msecs(acm->port.closing_wait) / 10;
942 return 0;
943}
944
945static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
946{
947 struct acm *acm = tty->driver_data;
948 unsigned int closing_wait, close_delay;
949 int retval = 0;
950
951 close_delay = msecs_to_jiffies(ss->close_delay * 10);
952 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
953 ASYNC_CLOSING_WAIT_NONE :
954 msecs_to_jiffies(ss->closing_wait * 10);
955
956 mutex_lock(&acm->port.mutex);
957
958 if (!capable(CAP_SYS_ADMIN)) {
959 if ((close_delay != acm->port.close_delay) ||
960 (closing_wait != acm->port.closing_wait))
961 retval = -EPERM;
962 } else {
963 acm->port.close_delay = close_delay;
964 acm->port.closing_wait = closing_wait;
965 }
966
967 mutex_unlock(&acm->port.mutex);
968 return retval;
969}
970
971static int wait_serial_change(struct acm *acm, unsigned long arg)
972{
973 int rv = 0;
974 DECLARE_WAITQUEUE(wait, current);
975 struct async_icount old, new;
976
977 do {
978 spin_lock_irq(&acm->read_lock);
979 old = acm->oldcount;
980 new = acm->iocount;
981 acm->oldcount = new;
982 spin_unlock_irq(&acm->read_lock);
983
984 if ((arg & TIOCM_DSR) &&
985 old.dsr != new.dsr)
986 break;
987 if ((arg & TIOCM_CD) &&
988 old.dcd != new.dcd)
989 break;
990 if ((arg & TIOCM_RI) &&
991 old.rng != new.rng)
992 break;
993
994 add_wait_queue(&acm->wioctl, &wait);
995 set_current_state(TASK_INTERRUPTIBLE);
996 schedule();
997 remove_wait_queue(&acm->wioctl, &wait);
998 if (acm->disconnected) {
999 if (arg & TIOCM_CD)
1000 break;
1001 else
1002 rv = -ENODEV;
1003 } else {
1004 if (signal_pending(current))
1005 rv = -ERESTARTSYS;
1006 }
1007 } while (!rv);
1008
1009
1010
1011 return rv;
1012}
1013
1014static int acm_tty_get_icount(struct tty_struct *tty,
1015 struct serial_icounter_struct *icount)
1016{
1017 struct acm *acm = tty->driver_data;
1018
1019 icount->dsr = acm->iocount.dsr;
1020 icount->rng = acm->iocount.rng;
1021 icount->dcd = acm->iocount.dcd;
1022 icount->frame = acm->iocount.frame;
1023 icount->overrun = acm->iocount.overrun;
1024 icount->parity = acm->iocount.parity;
1025 icount->brk = acm->iocount.brk;
1026
1027 return 0;
1028}
1029
1030static int acm_tty_ioctl(struct tty_struct *tty,
1031 unsigned int cmd, unsigned long arg)
1032{
1033 struct acm *acm = tty->driver_data;
1034 int rv = -ENOIOCTLCMD;
1035
1036 switch (cmd) {
1037 case TIOCMIWAIT:
1038 rv = usb_autopm_get_interface(acm->control);
1039 if (rv < 0) {
1040 rv = -EIO;
1041 break;
1042 }
1043 rv = wait_serial_change(acm, arg);
1044 usb_autopm_put_interface(acm->control);
1045 break;
1046 }
1047
1048 return rv;
1049}
1050
1051static void acm_tty_set_termios(struct tty_struct *tty,
1052 struct ktermios *termios_old)
1053{
1054 struct acm *acm = tty->driver_data;
1055 struct ktermios *termios = &tty->termios;
1056 struct usb_cdc_line_coding newline;
1057 int newctrl = acm->ctrlout;
1058
1059 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1060 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1061 newline.bParityType = termios->c_cflag & PARENB ?
1062 (termios->c_cflag & PARODD ? 1 : 2) +
1063 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1064 newline.bDataBits = tty_get_char_size(termios->c_cflag);
1065
1066
1067 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1068
1069 if (C_BAUD(tty) == B0) {
1070 newline.dwDTERate = acm->line.dwDTERate;
1071 newctrl &= ~ACM_CTRL_DTR;
1072 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1073 newctrl |= ACM_CTRL_DTR;
1074 }
1075
1076 if (newctrl != acm->ctrlout)
1077 acm_set_control(acm, acm->ctrlout = newctrl);
1078
1079 if (memcmp(&acm->line, &newline, sizeof newline)) {
1080 memcpy(&acm->line, &newline, sizeof newline);
1081 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1082 __func__,
1083 le32_to_cpu(newline.dwDTERate),
1084 newline.bCharFormat, newline.bParityType,
1085 newline.bDataBits);
1086 acm_set_line(acm, &acm->line);
1087 }
1088}
1089
1090static const struct tty_port_operations acm_port_ops = {
1091 .dtr_rts = acm_port_dtr_rts,
1092 .shutdown = acm_port_shutdown,
1093 .activate = acm_port_activate,
1094 .destruct = acm_port_destruct,
1095};
1096
1097
1098
1099
1100
1101
1102static void acm_write_buffers_free(struct acm *acm)
1103{
1104 int i;
1105 struct acm_wb *wb;
1106
1107 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1108 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1109}
1110
1111static void acm_read_buffers_free(struct acm *acm)
1112{
1113 int i;
1114
1115 for (i = 0; i < acm->rx_buflimit; i++)
1116 usb_free_coherent(acm->dev, acm->readsize,
1117 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1118}
1119
1120
1121static int acm_write_buffers_alloc(struct acm *acm)
1122{
1123 int i;
1124 struct acm_wb *wb;
1125
1126 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1127 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1128 &wb->dmah);
1129 if (!wb->buf) {
1130 while (i != 0) {
1131 --i;
1132 --wb;
1133 usb_free_coherent(acm->dev, acm->writesize,
1134 wb->buf, wb->dmah);
1135 }
1136 return -ENOMEM;
1137 }
1138 }
1139 return 0;
1140}
1141
1142static int acm_probe(struct usb_interface *intf,
1143 const struct usb_device_id *id)
1144{
1145 struct usb_cdc_union_desc *union_header = NULL;
1146 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1147 unsigned char *buffer = intf->altsetting->extra;
1148 int buflen = intf->altsetting->extralen;
1149 struct usb_interface *control_interface;
1150 struct usb_interface *data_interface;
1151 struct usb_endpoint_descriptor *epctrl = NULL;
1152 struct usb_endpoint_descriptor *epread = NULL;
1153 struct usb_endpoint_descriptor *epwrite = NULL;
1154 struct usb_device *usb_dev = interface_to_usbdev(intf);
1155 struct usb_cdc_parsed_header h;
1156 struct acm *acm;
1157 int minor;
1158 int ctrlsize, readsize;
1159 u8 *buf;
1160 int call_intf_num = -1;
1161 int data_intf_num = -1;
1162 unsigned long quirks;
1163 int num_rx_buf;
1164 int i;
1165 int combined_interfaces = 0;
1166 struct device *tty_dev;
1167 int rv = -ENOMEM;
1168 int res;
1169
1170
1171 quirks = (unsigned long)id->driver_info;
1172
1173 if (quirks == IGNORE_DEVICE)
1174 return -ENODEV;
1175
1176 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1177
1178 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1179
1180
1181 if (quirks == NO_UNION_NORMAL) {
1182 data_interface = usb_ifnum_to_if(usb_dev, 1);
1183 control_interface = usb_ifnum_to_if(usb_dev, 0);
1184
1185 if (!data_interface || !control_interface)
1186 return -ENODEV;
1187 goto skip_normal_probe;
1188 }
1189
1190
1191 if (!buffer) {
1192 dev_err(&intf->dev, "Weird descriptor references\n");
1193 return -EINVAL;
1194 }
1195
1196 if (!buflen) {
1197 if (intf->cur_altsetting->endpoint &&
1198 intf->cur_altsetting->endpoint->extralen &&
1199 intf->cur_altsetting->endpoint->extra) {
1200 dev_dbg(&intf->dev,
1201 "Seeking extra descriptors on endpoint\n");
1202 buflen = intf->cur_altsetting->endpoint->extralen;
1203 buffer = intf->cur_altsetting->endpoint->extra;
1204 } else {
1205 dev_err(&intf->dev,
1206 "Zero length descriptor references\n");
1207 return -EINVAL;
1208 }
1209 }
1210
1211 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1212 union_header = h.usb_cdc_union_desc;
1213 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1214 if (cmgmd)
1215 call_intf_num = cmgmd->bDataInterface;
1216
1217 if (!union_header) {
1218 if (intf->cur_altsetting->desc.bNumEndpoints == 3) {
1219 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n");
1220 combined_interfaces = 1;
1221 control_interface = data_interface = intf;
1222 goto look_for_collapsed_interface;
1223 } else if (call_intf_num > 0) {
1224 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1225 data_intf_num = call_intf_num;
1226 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1227 control_interface = intf;
1228 } else {
1229 dev_dbg(&intf->dev, "No union descriptor, giving up\n");
1230 return -ENODEV;
1231 }
1232 } else {
1233 int class = -1;
1234
1235 data_intf_num = union_header->bSlaveInterface0;
1236 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1237 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1238
1239 if (control_interface)
1240 class = control_interface->cur_altsetting->desc.bInterfaceClass;
1241
1242 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) {
1243 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n");
1244 combined_interfaces = 1;
1245 control_interface = data_interface = intf;
1246 goto look_for_collapsed_interface;
1247 }
1248 }
1249
1250 if (!control_interface || !data_interface) {
1251 dev_dbg(&intf->dev, "no interfaces\n");
1252 return -ENODEV;
1253 }
1254
1255 if (data_intf_num != call_intf_num)
1256 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1257
1258 if (control_interface == data_interface) {
1259
1260 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1261 combined_interfaces = 1;
1262
1263 quirks |= NO_CAP_LINE;
1264 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1265 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1266 return -EINVAL;
1267 }
1268look_for_collapsed_interface:
1269 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1270 &epread, &epwrite, &epctrl, NULL);
1271 if (res)
1272 return res;
1273
1274 goto made_compressed_probe;
1275 }
1276
1277skip_normal_probe:
1278
1279
1280 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) {
1281 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) {
1282 dev_dbg(&intf->dev,
1283 "Your device has switched interfaces.\n");
1284 swap(control_interface, data_interface);
1285 } else {
1286 return -EINVAL;
1287 }
1288 }
1289
1290
1291 if (!combined_interfaces && intf != control_interface)
1292 return -ENODEV;
1293
1294 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1295 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1296 return -EINVAL;
1297
1298 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1299 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1300 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1301
1302
1303
1304 if (!usb_endpoint_dir_in(epread)) {
1305
1306 dev_dbg(&intf->dev,
1307 "The data interface has switched endpoints\n");
1308 swap(epread, epwrite);
1309 }
1310made_compressed_probe:
1311 dev_dbg(&intf->dev, "interfaces are valid\n");
1312
1313 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1314 if (!acm)
1315 return -ENOMEM;
1316
1317 tty_port_init(&acm->port);
1318 acm->port.ops = &acm_port_ops;
1319
1320 ctrlsize = usb_endpoint_maxp(epctrl);
1321 readsize = usb_endpoint_maxp(epread) *
1322 (quirks == SINGLE_RX_URB ? 1 : 2);
1323 acm->combined_interfaces = combined_interfaces;
1324 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1325 acm->control = control_interface;
1326 acm->data = data_interface;
1327
1328 usb_get_intf(acm->control);
1329
1330 minor = acm_alloc_minor(acm);
1331 if (minor < 0) {
1332 acm->minor = ACM_MINOR_INVALID;
1333 goto err_put_port;
1334 }
1335
1336 acm->minor = minor;
1337 acm->dev = usb_dev;
1338 if (h.usb_cdc_acm_descriptor)
1339 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1340 if (quirks & NO_CAP_LINE)
1341 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1342 acm->ctrlsize = ctrlsize;
1343 acm->readsize = readsize;
1344 acm->rx_buflimit = num_rx_buf;
1345 INIT_DELAYED_WORK(&acm->dwork, acm_softint);
1346 init_waitqueue_head(&acm->wioctl);
1347 spin_lock_init(&acm->write_lock);
1348 spin_lock_init(&acm->read_lock);
1349 mutex_init(&acm->mutex);
1350 if (usb_endpoint_xfer_int(epread)) {
1351 acm->bInterval = epread->bInterval;
1352 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1353 } else {
1354 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1355 }
1356 if (usb_endpoint_xfer_int(epwrite))
1357 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1358 else
1359 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1360 init_usb_anchor(&acm->delayed);
1361 acm->quirks = quirks;
1362
1363 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1364 if (!buf)
1365 goto err_put_port;
1366 acm->ctrl_buffer = buf;
1367
1368 if (acm_write_buffers_alloc(acm) < 0)
1369 goto err_free_ctrl_buffer;
1370
1371 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1372 if (!acm->ctrlurb)
1373 goto err_free_write_buffers;
1374
1375 for (i = 0; i < num_rx_buf; i++) {
1376 struct acm_rb *rb = &(acm->read_buffers[i]);
1377 struct urb *urb;
1378
1379 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1380 &rb->dma);
1381 if (!rb->base)
1382 goto err_free_read_urbs;
1383 rb->index = i;
1384 rb->instance = acm;
1385
1386 urb = usb_alloc_urb(0, GFP_KERNEL);
1387 if (!urb)
1388 goto err_free_read_urbs;
1389
1390 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1391 urb->transfer_dma = rb->dma;
1392 if (usb_endpoint_xfer_int(epread))
1393 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1394 acm->readsize,
1395 acm_read_bulk_callback, rb,
1396 acm->bInterval);
1397 else
1398 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1399 acm->readsize,
1400 acm_read_bulk_callback, rb);
1401
1402 acm->read_urbs[i] = urb;
1403 __set_bit(i, &acm->read_urbs_free);
1404 }
1405 for (i = 0; i < ACM_NW; i++) {
1406 struct acm_wb *snd = &(acm->wb[i]);
1407
1408 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1409 if (!snd->urb)
1410 goto err_free_write_urbs;
1411
1412 if (usb_endpoint_xfer_int(epwrite))
1413 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1414 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1415 else
1416 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1417 NULL, acm->writesize, acm_write_bulk, snd);
1418 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1419 if (quirks & SEND_ZERO_PACKET)
1420 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1421 snd->instance = acm;
1422 }
1423
1424 usb_set_intfdata(intf, acm);
1425
1426 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1427 if (i < 0)
1428 goto err_free_write_urbs;
1429
1430 if (h.usb_cdc_country_functional_desc) {
1431 struct usb_cdc_country_functional_desc * cfd =
1432 h.usb_cdc_country_functional_desc;
1433
1434 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1435 if (!acm->country_codes)
1436 goto skip_countries;
1437 acm->country_code_size = cfd->bLength - 4;
1438 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1439 cfd->bLength - 4);
1440 acm->country_rel_date = cfd->iCountryCodeRelDate;
1441
1442 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1443 if (i < 0) {
1444 kfree(acm->country_codes);
1445 acm->country_codes = NULL;
1446 acm->country_code_size = 0;
1447 goto skip_countries;
1448 }
1449
1450 i = device_create_file(&intf->dev,
1451 &dev_attr_iCountryCodeRelDate);
1452 if (i < 0) {
1453 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1454 kfree(acm->country_codes);
1455 acm->country_codes = NULL;
1456 acm->country_code_size = 0;
1457 goto skip_countries;
1458 }
1459 }
1460
1461skip_countries:
1462 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1463 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1464 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1465
1466 epctrl->bInterval ? epctrl->bInterval : 16);
1467 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1468 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1469 acm->notification_buffer = NULL;
1470 acm->nb_index = 0;
1471 acm->nb_size = 0;
1472
1473 acm->line.dwDTERate = cpu_to_le32(9600);
1474 acm->line.bDataBits = 8;
1475 acm_set_line(acm, &acm->line);
1476
1477 if (!acm->combined_interfaces) {
1478 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm);
1479 if (rv)
1480 goto err_remove_files;
1481 }
1482
1483 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1484 &control_interface->dev);
1485 if (IS_ERR(tty_dev)) {
1486 rv = PTR_ERR(tty_dev);
1487 goto err_release_data_interface;
1488 }
1489
1490 if (quirks & CLEAR_HALT_CONDITIONS) {
1491 usb_clear_halt(usb_dev, acm->in);
1492 usb_clear_halt(usb_dev, acm->out);
1493 }
1494
1495 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1496
1497 return 0;
1498
1499err_release_data_interface:
1500 if (!acm->combined_interfaces) {
1501
1502 usb_set_intfdata(data_interface, NULL);
1503 usb_driver_release_interface(&acm_driver, data_interface);
1504 }
1505err_remove_files:
1506 if (acm->country_codes) {
1507 device_remove_file(&acm->control->dev,
1508 &dev_attr_wCountryCodes);
1509 device_remove_file(&acm->control->dev,
1510 &dev_attr_iCountryCodeRelDate);
1511 }
1512 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1513err_free_write_urbs:
1514 for (i = 0; i < ACM_NW; i++)
1515 usb_free_urb(acm->wb[i].urb);
1516err_free_read_urbs:
1517 for (i = 0; i < num_rx_buf; i++)
1518 usb_free_urb(acm->read_urbs[i]);
1519 acm_read_buffers_free(acm);
1520 usb_free_urb(acm->ctrlurb);
1521err_free_write_buffers:
1522 acm_write_buffers_free(acm);
1523err_free_ctrl_buffer:
1524 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1525err_put_port:
1526 tty_port_put(&acm->port);
1527
1528 return rv;
1529}
1530
1531static void acm_disconnect(struct usb_interface *intf)
1532{
1533 struct acm *acm = usb_get_intfdata(intf);
1534 struct tty_struct *tty;
1535 int i;
1536
1537
1538 if (!acm)
1539 return;
1540
1541 acm->disconnected = true;
1542
1543
1544
1545
1546
1547 acm_poison_urbs(acm);
1548 mutex_lock(&acm->mutex);
1549 if (acm->country_codes) {
1550 device_remove_file(&acm->control->dev,
1551 &dev_attr_wCountryCodes);
1552 device_remove_file(&acm->control->dev,
1553 &dev_attr_iCountryCodeRelDate);
1554 }
1555 wake_up_all(&acm->wioctl);
1556 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1557 usb_set_intfdata(acm->control, NULL);
1558 usb_set_intfdata(acm->data, NULL);
1559 mutex_unlock(&acm->mutex);
1560
1561 tty = tty_port_tty_get(&acm->port);
1562 if (tty) {
1563 tty_vhangup(tty);
1564 tty_kref_put(tty);
1565 }
1566
1567 cancel_delayed_work_sync(&acm->dwork);
1568
1569 tty_unregister_device(acm_tty_driver, acm->minor);
1570
1571 usb_free_urb(acm->ctrlurb);
1572 for (i = 0; i < ACM_NW; i++)
1573 usb_free_urb(acm->wb[i].urb);
1574 for (i = 0; i < acm->rx_buflimit; i++)
1575 usb_free_urb(acm->read_urbs[i]);
1576 acm_write_buffers_free(acm);
1577 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1578 acm_read_buffers_free(acm);
1579
1580 kfree(acm->notification_buffer);
1581
1582 if (!acm->combined_interfaces)
1583 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1584 acm->data : acm->control);
1585
1586 tty_port_put(&acm->port);
1587}
1588
1589#ifdef CONFIG_PM
1590static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1591{
1592 struct acm *acm = usb_get_intfdata(intf);
1593 int cnt;
1594
1595 spin_lock_irq(&acm->write_lock);
1596 if (PMSG_IS_AUTO(message)) {
1597 if (acm->transmitting) {
1598 spin_unlock_irq(&acm->write_lock);
1599 return -EBUSY;
1600 }
1601 }
1602 cnt = acm->susp_count++;
1603 spin_unlock_irq(&acm->write_lock);
1604
1605 if (cnt)
1606 return 0;
1607
1608 acm_poison_urbs(acm);
1609 cancel_delayed_work_sync(&acm->dwork);
1610 acm->urbs_in_error_delay = 0;
1611
1612 return 0;
1613}
1614
1615static int acm_resume(struct usb_interface *intf)
1616{
1617 struct acm *acm = usb_get_intfdata(intf);
1618 struct urb *urb;
1619 int rv = 0;
1620
1621 spin_lock_irq(&acm->write_lock);
1622
1623 if (--acm->susp_count)
1624 goto out;
1625
1626 acm_unpoison_urbs(acm);
1627
1628 if (tty_port_initialized(&acm->port)) {
1629 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1630
1631 for (;;) {
1632 urb = usb_get_from_anchor(&acm->delayed);
1633 if (!urb)
1634 break;
1635
1636 acm_start_wb(acm, urb->context);
1637 }
1638
1639
1640
1641
1642
1643 if (rv < 0)
1644 goto out;
1645
1646 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1647 }
1648out:
1649 spin_unlock_irq(&acm->write_lock);
1650
1651 return rv;
1652}
1653
1654static int acm_reset_resume(struct usb_interface *intf)
1655{
1656 struct acm *acm = usb_get_intfdata(intf);
1657
1658 if (tty_port_initialized(&acm->port))
1659 tty_port_tty_hangup(&acm->port, false);
1660
1661 return acm_resume(intf);
1662}
1663
1664#endif
1665
1666static int acm_pre_reset(struct usb_interface *intf)
1667{
1668 struct acm *acm = usb_get_intfdata(intf);
1669
1670 clear_bit(EVENT_RX_STALL, &acm->flags);
1671 acm->nb_index = 0;
1672
1673 return 0;
1674}
1675
1676#define NOKIA_PCSUITE_ACM_INFO(x) \
1677 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1678 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1679 USB_CDC_ACM_PROTO_VENDOR)
1680
1681#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1682 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1683 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1684 USB_CDC_ACM_PROTO_VENDOR)
1685
1686
1687
1688
1689
1690static const struct usb_device_id acm_ids[] = {
1691
1692 { USB_DEVICE(0x0424, 0x274e),
1693 .driver_info = DISABLE_ECHO, },
1694 { USB_DEVICE(0x076d, 0x0006),
1695 .driver_info = NO_UNION_NORMAL, },
1696 { USB_DEVICE(0x17ef, 0x7000),
1697 .driver_info = NO_UNION_NORMAL, },
1698 { USB_DEVICE(0x0870, 0x0001),
1699 .driver_info = NO_UNION_NORMAL,
1700 },
1701 { USB_DEVICE(0x045b, 0x023c),
1702 .driver_info = DISABLE_ECHO,
1703 },
1704 { USB_DEVICE(0x045b, 0x0248),
1705 .driver_info = DISABLE_ECHO,
1706 },
1707 { USB_DEVICE(0x045b, 0x024D),
1708 .driver_info = DISABLE_ECHO,
1709 },
1710 { USB_DEVICE(0x0e8d, 0x0003),
1711 .driver_info = NO_UNION_NORMAL,
1712 },
1713 { USB_DEVICE(0x0e8d, 0x2000),
1714 .driver_info = DISABLE_ECHO,
1715 },
1716 { USB_DEVICE(0x0e8d, 0x3329),
1717 .driver_info = NO_UNION_NORMAL,
1718 },
1719 { USB_DEVICE(0x0482, 0x0203),
1720 .driver_info = NO_UNION_NORMAL,
1721 },
1722 { USB_DEVICE(0x079b, 0x000f),
1723 .driver_info = NO_UNION_NORMAL,
1724 },
1725 { USB_DEVICE(0x0ace, 0x1602),
1726 .driver_info = SINGLE_RX_URB,
1727 },
1728 { USB_DEVICE(0x0ace, 0x1608),
1729 .driver_info = SINGLE_RX_URB,
1730 },
1731 { USB_DEVICE(0x0ace, 0x1611),
1732 .driver_info = SINGLE_RX_URB,
1733 },
1734 { USB_DEVICE(0x11ca, 0x0201),
1735 .driver_info = SINGLE_RX_URB,
1736 },
1737 { USB_DEVICE(0x1965, 0x0018),
1738 .driver_info = NO_UNION_NORMAL,
1739 },
1740 { USB_DEVICE(0x22b8, 0x7000),
1741 .driver_info = NO_UNION_NORMAL,
1742 },
1743 { USB_DEVICE(0x0803, 0x3095),
1744 .driver_info = NO_UNION_NORMAL,
1745 },
1746 { USB_DEVICE(0x0572, 0x1321),
1747 .driver_info = NO_UNION_NORMAL,
1748 },
1749 { USB_DEVICE(0x0572, 0x1324),
1750 .driver_info = NO_UNION_NORMAL,
1751 },
1752 { USB_DEVICE(0x0572, 0x1328),
1753 .driver_info = NO_UNION_NORMAL,
1754 },
1755 { USB_DEVICE(0x0572, 0x1349),
1756 .driver_info = NO_UNION_NORMAL,
1757 },
1758 { USB_DEVICE(0x20df, 0x0001),
1759 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1760 { USB_DEVICE(0x2184, 0x001c) },
1761 { USB_DEVICE(0x2184, 0x0036) },
1762 { USB_DEVICE(0x22b8, 0x6425),
1763 },
1764
1765 { USB_DEVICE(0x22b8, 0x2d91) },
1766 { USB_DEVICE(0x22b8, 0x2d92),
1767 .driver_info = NO_UNION_NORMAL,
1768 },
1769 { USB_DEVICE(0x22b8, 0x2d93),
1770 .driver_info = NO_UNION_NORMAL,
1771 },
1772 { USB_DEVICE(0x22b8, 0x2d95),
1773 .driver_info = NO_UNION_NORMAL,
1774 },
1775 { USB_DEVICE(0x22b8, 0x2d96),
1776 .driver_info = NO_UNION_NORMAL,
1777 },
1778 { USB_DEVICE(0x22b8, 0x2d97),
1779 .driver_info = NO_UNION_NORMAL,
1780 },
1781 { USB_DEVICE(0x22b8, 0x2d99),
1782 .driver_info = NO_UNION_NORMAL,
1783 },
1784 { USB_DEVICE(0x22b8, 0x2d9a),
1785 .driver_info = NO_UNION_NORMAL,
1786 },
1787
1788 { USB_DEVICE(0x0572, 0x1329),
1789 .driver_info = NO_UNION_NORMAL,
1790
1791
1792
1793
1794 },
1795 { USB_DEVICE(0x0572, 0x1340),
1796 .driver_info = NO_UNION_NORMAL,
1797 },
1798 { USB_DEVICE(0x05f9, 0x4002),
1799 .driver_info = NO_UNION_NORMAL,
1800 },
1801 { USB_DEVICE(0x1bbb, 0x0003),
1802 .driver_info = NO_UNION_NORMAL,
1803 },
1804 { USB_DEVICE(0x1576, 0x03b1),
1805 .driver_info = NO_UNION_NORMAL,
1806 },
1807 { USB_DEVICE(0xfff0, 0x0100),
1808 .driver_info = NO_UNION_NORMAL,
1809 },
1810 { USB_DEVICE(0x09d8, 0x0320),
1811 .driver_info = NO_UNION_NORMAL,
1812 },
1813 { USB_DEVICE(0x0ca6, 0xa050),
1814 .driver_info = NO_UNION_NORMAL,
1815 },
1816
1817 { USB_DEVICE(0x2912, 0x0001),
1818 .driver_info = CLEAR_HALT_CONDITIONS,
1819 },
1820
1821
1822
1823
1824
1825
1826 { NOKIA_PCSUITE_ACM_INFO(0x042D), },
1827 { NOKIA_PCSUITE_ACM_INFO(0x04D8), },
1828 { NOKIA_PCSUITE_ACM_INFO(0x04C9), },
1829 { NOKIA_PCSUITE_ACM_INFO(0x0419), },
1830 { NOKIA_PCSUITE_ACM_INFO(0x044D), },
1831 { NOKIA_PCSUITE_ACM_INFO(0x0001), },
1832 { NOKIA_PCSUITE_ACM_INFO(0x0475), },
1833 { NOKIA_PCSUITE_ACM_INFO(0x0508), },
1834 { NOKIA_PCSUITE_ACM_INFO(0x0418), },
1835 { NOKIA_PCSUITE_ACM_INFO(0x0425), },
1836 { NOKIA_PCSUITE_ACM_INFO(0x0486), },
1837 { NOKIA_PCSUITE_ACM_INFO(0x04DF), },
1838 { NOKIA_PCSUITE_ACM_INFO(0x000e), },
1839 { NOKIA_PCSUITE_ACM_INFO(0x0445), },
1840 { NOKIA_PCSUITE_ACM_INFO(0x042F), },
1841 { NOKIA_PCSUITE_ACM_INFO(0x048E), },
1842 { NOKIA_PCSUITE_ACM_INFO(0x0420), },
1843 { NOKIA_PCSUITE_ACM_INFO(0x04E6), },
1844 { NOKIA_PCSUITE_ACM_INFO(0x04B2), },
1845 { NOKIA_PCSUITE_ACM_INFO(0x0134), },
1846 { NOKIA_PCSUITE_ACM_INFO(0x046E), },
1847 { NOKIA_PCSUITE_ACM_INFO(0x002f), },
1848 { NOKIA_PCSUITE_ACM_INFO(0x0088), },
1849 { NOKIA_PCSUITE_ACM_INFO(0x00fc), },
1850 { NOKIA_PCSUITE_ACM_INFO(0x0042), },
1851 { NOKIA_PCSUITE_ACM_INFO(0x00b0), },
1852 { NOKIA_PCSUITE_ACM_INFO(0x00ab), },
1853 { NOKIA_PCSUITE_ACM_INFO(0x0481), },
1854 { NOKIA_PCSUITE_ACM_INFO(0x0007), },
1855 { NOKIA_PCSUITE_ACM_INFO(0x0071), },
1856 { NOKIA_PCSUITE_ACM_INFO(0x04F0), },
1857 { NOKIA_PCSUITE_ACM_INFO(0x0070), },
1858 { NOKIA_PCSUITE_ACM_INFO(0x0099), },
1859 { NOKIA_PCSUITE_ACM_INFO(0x0128), },
1860 { NOKIA_PCSUITE_ACM_INFO(0x008f), },
1861 { NOKIA_PCSUITE_ACM_INFO(0x00a0), },
1862 { NOKIA_PCSUITE_ACM_INFO(0x007b), },
1863 { NOKIA_PCSUITE_ACM_INFO(0x0094), },
1864 { NOKIA_PCSUITE_ACM_INFO(0x003a), },
1865 { NOKIA_PCSUITE_ACM_INFO(0x00e9), },
1866 { NOKIA_PCSUITE_ACM_INFO(0x0108), },
1867 { NOKIA_PCSUITE_ACM_INFO(0x01f5), },
1868 { NOKIA_PCSUITE_ACM_INFO(0x02e3), },
1869 { NOKIA_PCSUITE_ACM_INFO(0x0178), },
1870 { NOKIA_PCSUITE_ACM_INFO(0x010e), },
1871 { NOKIA_PCSUITE_ACM_INFO(0x02d9), },
1872 { NOKIA_PCSUITE_ACM_INFO(0x01d0), },
1873 { NOKIA_PCSUITE_ACM_INFO(0x0223), },
1874 { NOKIA_PCSUITE_ACM_INFO(0x0275), },
1875 { NOKIA_PCSUITE_ACM_INFO(0x026c), },
1876 { NOKIA_PCSUITE_ACM_INFO(0x0154), },
1877 { NOKIA_PCSUITE_ACM_INFO(0x04ce), },
1878 { NOKIA_PCSUITE_ACM_INFO(0x01d4), },
1879 { NOKIA_PCSUITE_ACM_INFO(0x0302), },
1880 { NOKIA_PCSUITE_ACM_INFO(0x0335), },
1881 { NOKIA_PCSUITE_ACM_INFO(0x03cd), },
1882 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), },
1883
1884
1885 { USB_DEVICE(0x03eb, 0x0030), },
1886
1887
1888
1889#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1890 { USB_DEVICE(0x04d8, 0x0082),
1891 .driver_info = IGNORE_DEVICE,
1892 },
1893 { USB_DEVICE(0x04d8, 0x0083),
1894 .driver_info = IGNORE_DEVICE,
1895 },
1896#endif
1897
1898#if IS_ENABLED(CONFIG_IR_TOY)
1899 { USB_DEVICE(0x04d8, 0xfd08),
1900 .driver_info = IGNORE_DEVICE,
1901 },
1902
1903 { USB_DEVICE(0x04d8, 0xf58b),
1904 .driver_info = IGNORE_DEVICE,
1905 },
1906#endif
1907
1908#if IS_ENABLED(CONFIG_USB_SERIAL_XR)
1909 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE },
1910 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE },
1911 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE },
1912 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE },
1913 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE },
1914 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE },
1915 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE },
1916 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE },
1917 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE },
1918 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE },
1919 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE },
1920#endif
1921
1922
1923 { USB_DEVICE(0x04e8, 0x685d),
1924 .driver_info = IGNORE_DEVICE,
1925 },
1926
1927
1928 { USB_DEVICE(0x058b, 0x0041),
1929 .driver_info = IGNORE_DEVICE,
1930 },
1931
1932
1933 { USB_DEVICE(0x108c, 0x0159),
1934 .driver_info = IGNORE_DEVICE,
1935 },
1936 { USB_DEVICE(0x108c, 0x0168),
1937 .driver_info = IGNORE_DEVICE,
1938 },
1939 { USB_DEVICE(0x108c, 0x0169),
1940 .driver_info = IGNORE_DEVICE,
1941 },
1942
1943 { USB_DEVICE(0x1bc7, 0x0021),
1944 .driver_info = SEND_ZERO_PACKET,
1945 },
1946 { USB_DEVICE(0x1bc7, 0x0023),
1947 .driver_info = SEND_ZERO_PACKET,
1948 },
1949
1950
1951 { USB_DEVICE(0x27c6, 0x5395),
1952 .driver_info = IGNORE_DEVICE,
1953 },
1954
1955
1956 { USB_DEVICE(0x32a7, 0x0000),
1957 .driver_info = IGNORE_DEVICE,
1958 },
1959
1960
1961 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1962 USB_CDC_PROTO_NONE) },
1963
1964
1965 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1966 USB_CDC_ACM_PROTO_AT_V25TER) },
1967 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1968 USB_CDC_ACM_PROTO_AT_PCCA101) },
1969 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1970 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1971 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1972 USB_CDC_ACM_PROTO_AT_GSM) },
1973 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1974 USB_CDC_ACM_PROTO_AT_3G) },
1975 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1976 USB_CDC_ACM_PROTO_AT_CDMA) },
1977
1978 { USB_DEVICE(0x1519, 0x0452),
1979 .driver_info = SEND_ZERO_PACKET,
1980 },
1981
1982 { }
1983};
1984
1985MODULE_DEVICE_TABLE(usb, acm_ids);
1986
1987static struct usb_driver acm_driver = {
1988 .name = "cdc_acm",
1989 .probe = acm_probe,
1990 .disconnect = acm_disconnect,
1991#ifdef CONFIG_PM
1992 .suspend = acm_suspend,
1993 .resume = acm_resume,
1994 .reset_resume = acm_reset_resume,
1995#endif
1996 .pre_reset = acm_pre_reset,
1997 .id_table = acm_ids,
1998#ifdef CONFIG_PM
1999 .supports_autosuspend = 1,
2000#endif
2001 .disable_hub_initiated_lpm = 1,
2002};
2003
2004
2005
2006
2007
2008static const struct tty_operations acm_ops = {
2009 .install = acm_tty_install,
2010 .open = acm_tty_open,
2011 .close = acm_tty_close,
2012 .cleanup = acm_tty_cleanup,
2013 .hangup = acm_tty_hangup,
2014 .write = acm_tty_write,
2015 .write_room = acm_tty_write_room,
2016 .ioctl = acm_tty_ioctl,
2017 .throttle = acm_tty_throttle,
2018 .unthrottle = acm_tty_unthrottle,
2019 .chars_in_buffer = acm_tty_chars_in_buffer,
2020 .break_ctl = acm_tty_break_ctl,
2021 .set_termios = acm_tty_set_termios,
2022 .tiocmget = acm_tty_tiocmget,
2023 .tiocmset = acm_tty_tiocmset,
2024 .get_serial = get_serial_info,
2025 .set_serial = set_serial_info,
2026 .get_icount = acm_tty_get_icount,
2027};
2028
2029
2030
2031
2032
2033static int __init acm_init(void)
2034{
2035 int retval;
2036 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW |
2037 TTY_DRIVER_DYNAMIC_DEV);
2038 if (IS_ERR(acm_tty_driver))
2039 return PTR_ERR(acm_tty_driver);
2040 acm_tty_driver->driver_name = "acm",
2041 acm_tty_driver->name = "ttyACM",
2042 acm_tty_driver->major = ACM_TTY_MAJOR,
2043 acm_tty_driver->minor_start = 0,
2044 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2045 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2046 acm_tty_driver->init_termios = tty_std_termios;
2047 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2048 HUPCL | CLOCAL;
2049 tty_set_operations(acm_tty_driver, &acm_ops);
2050
2051 retval = tty_register_driver(acm_tty_driver);
2052 if (retval) {
2053 tty_driver_kref_put(acm_tty_driver);
2054 return retval;
2055 }
2056
2057 retval = usb_register(&acm_driver);
2058 if (retval) {
2059 tty_unregister_driver(acm_tty_driver);
2060 tty_driver_kref_put(acm_tty_driver);
2061 return retval;
2062 }
2063
2064 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2065
2066 return 0;
2067}
2068
2069static void __exit acm_exit(void)
2070{
2071 usb_deregister(&acm_driver);
2072 tty_unregister_driver(acm_tty_driver);
2073 tty_driver_kref_put(acm_tty_driver);
2074 idr_destroy(&acm_minors);
2075}
2076
2077module_init(acm_init);
2078module_exit(acm_exit);
2079
2080MODULE_AUTHOR(DRIVER_AUTHOR);
2081MODULE_DESCRIPTION(DRIVER_DESC);
2082MODULE_LICENSE("GPL");
2083MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
2084
