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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_kill_urbs(struct acm *acm)
151{
152 int i;
153
154 usb_kill_urb(acm->ctrlurb);
155 for (i = 0; i < ACM_NW; i++)
156 usb_kill_urb(acm->wb[i].urb);
157 for (i = 0; i < acm->rx_buflimit; i++)
158 usb_kill_urb(acm->read_urbs[i]);
159}
160
161
162
163
164
165
166static int acm_wb_alloc(struct acm *acm)
167{
168 int i, wbn;
169 struct acm_wb *wb;
170
171 wbn = 0;
172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 wb->len = 0;
178 return wbn;
179 }
180 wbn = (wbn + 1) % ACM_NW;
181 if (++i >= ACM_NW)
182 return -1;
183 }
184}
185
186static int acm_wb_is_avail(struct acm *acm)
187{
188 int i, n;
189 unsigned long flags;
190
191 n = ACM_NW;
192 spin_lock_irqsave(&acm->write_lock, flags);
193 for (i = 0; i < ACM_NW; i++)
194 n -= acm->wb[i].use;
195 spin_unlock_irqrestore(&acm->write_lock, flags);
196 return n;
197}
198
199
200
201
202static void acm_write_done(struct acm *acm, struct acm_wb *wb)
203{
204 wb->use = 0;
205 acm->transmitting--;
206 usb_autopm_put_interface_async(acm->control);
207}
208
209
210
211
212
213
214
215static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
216{
217 int rc;
218
219 acm->transmitting++;
220
221 wb->urb->transfer_buffer = wb->buf;
222 wb->urb->transfer_dma = wb->dmah;
223 wb->urb->transfer_buffer_length = wb->len;
224 wb->urb->dev = acm->dev;
225
226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
227 if (rc < 0) {
228 dev_err(&acm->data->dev,
229 "%s - usb_submit_urb(write bulk) failed: %d\n",
230 __func__, rc);
231 acm_write_done(acm, wb);
232 }
233 return rc;
234}
235
236
237
238
239static ssize_t bmCapabilities_show
240(struct device *dev, struct device_attribute *attr, char *buf)
241{
242 struct usb_interface *intf = to_usb_interface(dev);
243 struct acm *acm = usb_get_intfdata(intf);
244
245 return sprintf(buf, "%d", acm->ctrl_caps);
246}
247static DEVICE_ATTR_RO(bmCapabilities);
248
249static ssize_t wCountryCodes_show
250(struct device *dev, struct device_attribute *attr, char *buf)
251{
252 struct usb_interface *intf = to_usb_interface(dev);
253 struct acm *acm = usb_get_intfdata(intf);
254
255 memcpy(buf, acm->country_codes, acm->country_code_size);
256 return acm->country_code_size;
257}
258
259static DEVICE_ATTR_RO(wCountryCodes);
260
261static ssize_t iCountryCodeRelDate_show
262(struct device *dev, struct device_attribute *attr, char *buf)
263{
264 struct usb_interface *intf = to_usb_interface(dev);
265 struct acm *acm = usb_get_intfdata(intf);
266
267 return sprintf(buf, "%d", acm->country_rel_date);
268}
269
270static DEVICE_ATTR_RO(iCountryCodeRelDate);
271
272
273
274
275static void acm_process_notification(struct acm *acm, unsigned char *buf)
276{
277 int newctrl;
278 int difference;
279 unsigned long flags;
280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
281 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
282
283 switch (dr->bNotificationType) {
284 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
285 dev_dbg(&acm->control->dev,
286 "%s - network connection: %d\n", __func__, dr->wValue);
287 break;
288
289 case USB_CDC_NOTIFY_SERIAL_STATE:
290 if (le16_to_cpu(dr->wLength) != 2) {
291 dev_dbg(&acm->control->dev,
292 "%s - malformed serial state\n", __func__);
293 break;
294 }
295
296 newctrl = get_unaligned_le16(data);
297 dev_dbg(&acm->control->dev,
298 "%s - serial state: 0x%x\n", __func__, newctrl);
299
300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
301 dev_dbg(&acm->control->dev,
302 "%s - calling hangup\n", __func__);
303 tty_port_tty_hangup(&acm->port, false);
304 }
305
306 difference = acm->ctrlin ^ newctrl;
307 spin_lock_irqsave(&acm->read_lock, flags);
308 acm->ctrlin = newctrl;
309 acm->oldcount = acm->iocount;
310
311 if (difference & ACM_CTRL_DSR)
312 acm->iocount.dsr++;
313 if (difference & ACM_CTRL_DCD)
314 acm->iocount.dcd++;
315 if (newctrl & ACM_CTRL_BRK)
316 acm->iocount.brk++;
317 if (newctrl & ACM_CTRL_RI)
318 acm->iocount.rng++;
319 if (newctrl & ACM_CTRL_FRAMING)
320 acm->iocount.frame++;
321 if (newctrl & ACM_CTRL_PARITY)
322 acm->iocount.parity++;
323 if (newctrl & ACM_CTRL_OVERRUN)
324 acm->iocount.overrun++;
325 spin_unlock_irqrestore(&acm->read_lock, flags);
326
327 if (difference)
328 wake_up_all(&acm->wioctl);
329
330 break;
331
332 default:
333 dev_dbg(&acm->control->dev,
334 "%s - unknown notification %d received: index %d len %d\n",
335 __func__,
336 dr->bNotificationType, dr->wIndex, dr->wLength);
337 }
338}
339
340
341static void acm_ctrl_irq(struct urb *urb)
342{
343 struct acm *acm = urb->context;
344 struct usb_cdc_notification *dr = urb->transfer_buffer;
345 unsigned int current_size = urb->actual_length;
346 unsigned int expected_size, copy_size, alloc_size;
347 int retval;
348 int status = urb->status;
349
350 switch (status) {
351 case 0:
352
353 break;
354 case -ECONNRESET:
355 case -ENOENT:
356 case -ESHUTDOWN:
357
358 dev_dbg(&acm->control->dev,
359 "%s - urb shutting down with status: %d\n",
360 __func__, status);
361 return;
362 default:
363 dev_dbg(&acm->control->dev,
364 "%s - nonzero urb status received: %d\n",
365 __func__, status);
366 goto exit;
367 }
368
369 usb_mark_last_busy(acm->dev);
370
371 if (acm->nb_index)
372 dr = (struct usb_cdc_notification *)acm->notification_buffer;
373
374
375 expected_size = sizeof(struct usb_cdc_notification) +
376 le16_to_cpu(dr->wLength);
377
378 if (current_size < expected_size) {
379
380 if (acm->nb_size < expected_size) {
381 if (acm->nb_size) {
382 kfree(acm->notification_buffer);
383 acm->nb_size = 0;
384 }
385 alloc_size = roundup_pow_of_two(expected_size);
386
387
388
389
390
391 acm->notification_buffer =
392 kmalloc(alloc_size, GFP_ATOMIC);
393 if (!acm->notification_buffer)
394 goto exit;
395 acm->nb_size = alloc_size;
396 }
397
398 copy_size = min(current_size,
399 expected_size - acm->nb_index);
400
401 memcpy(&acm->notification_buffer[acm->nb_index],
402 urb->transfer_buffer, copy_size);
403 acm->nb_index += copy_size;
404 current_size = acm->nb_index;
405 }
406
407 if (current_size >= expected_size) {
408
409 acm_process_notification(acm, (unsigned char *)dr);
410 acm->nb_index = 0;
411 }
412
413exit:
414 retval = usb_submit_urb(urb, GFP_ATOMIC);
415 if (retval && retval != -EPERM)
416 dev_err(&acm->control->dev,
417 "%s - usb_submit_urb failed: %d\n", __func__, retval);
418}
419
420static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
421{
422 int res;
423
424 if (!test_and_clear_bit(index, &acm->read_urbs_free))
425 return 0;
426
427 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
428 if (res) {
429 if (res != -EPERM && res != -ENODEV) {
430 dev_err(&acm->data->dev,
431 "urb %d failed submission with %d\n",
432 index, res);
433 }
434 set_bit(index, &acm->read_urbs_free);
435 return res;
436 } else {
437 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
438 }
439
440 return 0;
441}
442
443static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
444{
445 int res;
446 int i;
447
448 for (i = 0; i < acm->rx_buflimit; ++i) {
449 res = acm_submit_read_urb(acm, i, mem_flags);
450 if (res)
451 return res;
452 }
453
454 return 0;
455}
456
457static void acm_process_read_urb(struct acm *acm, struct urb *urb)
458{
459 if (!urb->actual_length)
460 return;
461
462 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
463 urb->actual_length);
464 tty_flip_buffer_push(&acm->port);
465}
466
467static void acm_read_bulk_callback(struct urb *urb)
468{
469 struct acm_rb *rb = urb->context;
470 struct acm *acm = rb->instance;
471 int status = urb->status;
472 bool stopped = false;
473 bool stalled = false;
474
475 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
476 rb->index, urb->actual_length, status);
477
478 if (!acm->dev) {
479 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
480 return;
481 }
482
483 switch (status) {
484 case 0:
485 usb_mark_last_busy(acm->dev);
486 acm_process_read_urb(acm, urb);
487 break;
488 case -EPIPE:
489 set_bit(EVENT_RX_STALL, &acm->flags);
490 stalled = true;
491 break;
492 case -ENOENT:
493 case -ECONNRESET:
494 case -ESHUTDOWN:
495 dev_dbg(&acm->data->dev,
496 "%s - urb shutting down with status: %d\n",
497 __func__, status);
498 stopped = true;
499 break;
500 default:
501 dev_dbg(&acm->data->dev,
502 "%s - nonzero urb status received: %d\n",
503 __func__, status);
504 break;
505 }
506
507
508
509
510
511
512 smp_mb__before_atomic();
513 set_bit(rb->index, &acm->read_urbs_free);
514
515
516
517
518
519 smp_mb__after_atomic();
520
521 if (stopped || stalled) {
522 if (stalled)
523 schedule_work(&acm->work);
524 return;
525 }
526
527 if (test_bit(ACM_THROTTLED, &acm->flags))
528 return;
529
530 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
531}
532
533
534static void acm_write_bulk(struct urb *urb)
535{
536 struct acm_wb *wb = urb->context;
537 struct acm *acm = wb->instance;
538 unsigned long flags;
539 int status = urb->status;
540
541 if (status || (urb->actual_length != urb->transfer_buffer_length))
542 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
543 urb->actual_length,
544 urb->transfer_buffer_length,
545 status);
546
547 spin_lock_irqsave(&acm->write_lock, flags);
548 acm_write_done(acm, wb);
549 spin_unlock_irqrestore(&acm->write_lock, flags);
550 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
551 schedule_work(&acm->work);
552}
553
554static void acm_softint(struct work_struct *work)
555{
556 int i;
557 struct acm *acm = container_of(work, struct acm, work);
558
559 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
560 if (!(usb_autopm_get_interface(acm->data))) {
561 for (i = 0; i < acm->rx_buflimit; i++)
562 usb_kill_urb(acm->read_urbs[i]);
563 usb_clear_halt(acm->dev, acm->in);
564 acm_submit_read_urbs(acm, GFP_KERNEL);
565 usb_autopm_put_interface(acm->data);
566 }
567 clear_bit(EVENT_RX_STALL, &acm->flags);
568 }
569
570 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
571 tty_port_tty_wakeup(&acm->port);
572}
573
574
575
576
577
578static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
579{
580 struct acm *acm;
581 int retval;
582
583 acm = acm_get_by_minor(tty->index);
584 if (!acm)
585 return -ENODEV;
586
587 retval = tty_standard_install(driver, tty);
588 if (retval)
589 goto error_init_termios;
590
591
592
593
594
595 if (acm->quirks & DISABLE_ECHO)
596 tty->termios.c_lflag &= ~ECHO;
597
598 tty->driver_data = acm;
599
600 return 0;
601
602error_init_termios:
603 tty_port_put(&acm->port);
604 return retval;
605}
606
607static int acm_tty_open(struct tty_struct *tty, struct file *filp)
608{
609 struct acm *acm = tty->driver_data;
610
611 return tty_port_open(&acm->port, tty, filp);
612}
613
614static void acm_port_dtr_rts(struct tty_port *port, int raise)
615{
616 struct acm *acm = container_of(port, struct acm, port);
617 int val;
618 int res;
619
620 if (raise)
621 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
622 else
623 val = 0;
624
625
626 acm->ctrlout = val;
627
628 res = acm_set_control(acm, val);
629 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
630 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
631}
632
633static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
634{
635 struct acm *acm = container_of(port, struct acm, port);
636 int retval = -ENODEV;
637 int i;
638
639 mutex_lock(&acm->mutex);
640 if (acm->disconnected)
641 goto disconnected;
642
643 retval = usb_autopm_get_interface(acm->control);
644 if (retval)
645 goto error_get_interface;
646
647
648
649
650
651 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
652 acm->control->needs_remote_wakeup = 1;
653
654 acm->ctrlurb->dev = acm->dev;
655 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
656 if (retval) {
657 dev_err(&acm->control->dev,
658 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
659 goto error_submit_urb;
660 }
661
662 acm_tty_set_termios(tty, NULL);
663
664
665
666
667 clear_bit(ACM_THROTTLED, &acm->flags);
668
669 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
670 if (retval)
671 goto error_submit_read_urbs;
672
673 usb_autopm_put_interface(acm->control);
674
675 mutex_unlock(&acm->mutex);
676
677 return 0;
678
679error_submit_read_urbs:
680 for (i = 0; i < acm->rx_buflimit; i++)
681 usb_kill_urb(acm->read_urbs[i]);
682 usb_kill_urb(acm->ctrlurb);
683error_submit_urb:
684 usb_autopm_put_interface(acm->control);
685error_get_interface:
686disconnected:
687 mutex_unlock(&acm->mutex);
688
689 return usb_translate_errors(retval);
690}
691
692static void acm_port_destruct(struct tty_port *port)
693{
694 struct acm *acm = container_of(port, struct acm, port);
695
696 acm_release_minor(acm);
697 usb_put_intf(acm->control);
698 kfree(acm->country_codes);
699 kfree(acm);
700}
701
702static void acm_port_shutdown(struct tty_port *port)
703{
704 struct acm *acm = container_of(port, struct acm, port);
705 struct urb *urb;
706 struct acm_wb *wb;
707
708
709
710
711
712 spin_lock_irq(&acm->write_lock);
713 spin_unlock_irq(&acm->write_lock);
714
715 usb_autopm_get_interface_no_resume(acm->control);
716 acm->control->needs_remote_wakeup = 0;
717 usb_autopm_put_interface(acm->control);
718
719 for (;;) {
720 urb = usb_get_from_anchor(&acm->delayed);
721 if (!urb)
722 break;
723 wb = urb->context;
724 wb->use = 0;
725 usb_autopm_put_interface_async(acm->control);
726 }
727
728 acm_kill_urbs(acm);
729}
730
731static void acm_tty_cleanup(struct tty_struct *tty)
732{
733 struct acm *acm = tty->driver_data;
734
735 tty_port_put(&acm->port);
736}
737
738static void acm_tty_hangup(struct tty_struct *tty)
739{
740 struct acm *acm = tty->driver_data;
741
742 tty_port_hangup(&acm->port);
743}
744
745static void acm_tty_close(struct tty_struct *tty, struct file *filp)
746{
747 struct acm *acm = tty->driver_data;
748
749 tty_port_close(&acm->port, tty, filp);
750}
751
752static int acm_tty_write(struct tty_struct *tty,
753 const unsigned char *buf, int count)
754{
755 struct acm *acm = tty->driver_data;
756 int stat;
757 unsigned long flags;
758 int wbn;
759 struct acm_wb *wb;
760
761 if (!count)
762 return 0;
763
764 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
765
766 spin_lock_irqsave(&acm->write_lock, flags);
767 wbn = acm_wb_alloc(acm);
768 if (wbn < 0) {
769 spin_unlock_irqrestore(&acm->write_lock, flags);
770 return 0;
771 }
772 wb = &acm->wb[wbn];
773
774 if (!acm->dev) {
775 wb->use = 0;
776 spin_unlock_irqrestore(&acm->write_lock, flags);
777 return -ENODEV;
778 }
779
780 count = (count > acm->writesize) ? acm->writesize : count;
781 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
782 memcpy(wb->buf, buf, count);
783 wb->len = count;
784
785 stat = usb_autopm_get_interface_async(acm->control);
786 if (stat) {
787 wb->use = 0;
788 spin_unlock_irqrestore(&acm->write_lock, flags);
789 return stat;
790 }
791
792 if (acm->susp_count) {
793 usb_anchor_urb(wb->urb, &acm->delayed);
794 spin_unlock_irqrestore(&acm->write_lock, flags);
795 return count;
796 }
797
798 stat = acm_start_wb(acm, wb);
799 spin_unlock_irqrestore(&acm->write_lock, flags);
800
801 if (stat < 0)
802 return stat;
803 return count;
804}
805
806static int acm_tty_write_room(struct tty_struct *tty)
807{
808 struct acm *acm = tty->driver_data;
809
810
811
812
813 return acm_wb_is_avail(acm) ? acm->writesize : 0;
814}
815
816static int acm_tty_chars_in_buffer(struct tty_struct *tty)
817{
818 struct acm *acm = tty->driver_data;
819
820
821
822
823 if (acm->disconnected)
824 return 0;
825
826
827
828 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
829}
830
831static void acm_tty_throttle(struct tty_struct *tty)
832{
833 struct acm *acm = tty->driver_data;
834
835 set_bit(ACM_THROTTLED, &acm->flags);
836}
837
838static void acm_tty_unthrottle(struct tty_struct *tty)
839{
840 struct acm *acm = tty->driver_data;
841
842 clear_bit(ACM_THROTTLED, &acm->flags);
843
844
845 smp_mb();
846
847 acm_submit_read_urbs(acm, GFP_KERNEL);
848}
849
850static int acm_tty_break_ctl(struct tty_struct *tty, int state)
851{
852 struct acm *acm = tty->driver_data;
853 int retval;
854
855 retval = acm_send_break(acm, state ? 0xffff : 0);
856 if (retval < 0)
857 dev_dbg(&acm->control->dev,
858 "%s - send break failed\n", __func__);
859 return retval;
860}
861
862static int acm_tty_tiocmget(struct tty_struct *tty)
863{
864 struct acm *acm = tty->driver_data;
865
866 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
867 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
868 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
869 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
870 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
871 TIOCM_CTS;
872}
873
874static int acm_tty_tiocmset(struct tty_struct *tty,
875 unsigned int set, unsigned int clear)
876{
877 struct acm *acm = tty->driver_data;
878 unsigned int newctrl;
879
880 newctrl = acm->ctrlout;
881 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
882 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
883 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
884 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
885
886 newctrl = (newctrl & ~clear) | set;
887
888 if (acm->ctrlout == newctrl)
889 return 0;
890 return acm_set_control(acm, acm->ctrlout = newctrl);
891}
892
893static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
894{
895 struct acm *acm = tty->driver_data;
896
897 ss->xmit_fifo_size = acm->writesize;
898 ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
899 ss->close_delay = acm->port.close_delay / 10;
900 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
901 ASYNC_CLOSING_WAIT_NONE :
902 acm->port.closing_wait / 10;
903 return 0;
904}
905
906static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
907{
908 struct acm *acm = tty->driver_data;
909 unsigned int closing_wait, close_delay;
910 int retval = 0;
911
912 close_delay = ss->close_delay * 10;
913 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
914 ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
915
916 mutex_lock(&acm->port.mutex);
917
918 if (!capable(CAP_SYS_ADMIN)) {
919 if ((close_delay != acm->port.close_delay) ||
920 (closing_wait != acm->port.closing_wait))
921 retval = -EPERM;
922 else
923 retval = -EOPNOTSUPP;
924 } else {
925 acm->port.close_delay = close_delay;
926 acm->port.closing_wait = closing_wait;
927 }
928
929 mutex_unlock(&acm->port.mutex);
930 return retval;
931}
932
933static int wait_serial_change(struct acm *acm, unsigned long arg)
934{
935 int rv = 0;
936 DECLARE_WAITQUEUE(wait, current);
937 struct async_icount old, new;
938
939 do {
940 spin_lock_irq(&acm->read_lock);
941 old = acm->oldcount;
942 new = acm->iocount;
943 acm->oldcount = new;
944 spin_unlock_irq(&acm->read_lock);
945
946 if ((arg & TIOCM_DSR) &&
947 old.dsr != new.dsr)
948 break;
949 if ((arg & TIOCM_CD) &&
950 old.dcd != new.dcd)
951 break;
952 if ((arg & TIOCM_RI) &&
953 old.rng != new.rng)
954 break;
955
956 add_wait_queue(&acm->wioctl, &wait);
957 set_current_state(TASK_INTERRUPTIBLE);
958 schedule();
959 remove_wait_queue(&acm->wioctl, &wait);
960 if (acm->disconnected) {
961 if (arg & TIOCM_CD)
962 break;
963 else
964 rv = -ENODEV;
965 } else {
966 if (signal_pending(current))
967 rv = -ERESTARTSYS;
968 }
969 } while (!rv);
970
971
972
973 return rv;
974}
975
976static int acm_tty_get_icount(struct tty_struct *tty,
977 struct serial_icounter_struct *icount)
978{
979 struct acm *acm = tty->driver_data;
980
981 icount->dsr = acm->iocount.dsr;
982 icount->rng = acm->iocount.rng;
983 icount->dcd = acm->iocount.dcd;
984 icount->frame = acm->iocount.frame;
985 icount->overrun = acm->iocount.overrun;
986 icount->parity = acm->iocount.parity;
987 icount->brk = acm->iocount.brk;
988
989 return 0;
990}
991
992static int acm_tty_ioctl(struct tty_struct *tty,
993 unsigned int cmd, unsigned long arg)
994{
995 struct acm *acm = tty->driver_data;
996 int rv = -ENOIOCTLCMD;
997
998 switch (cmd) {
999 case TIOCMIWAIT:
1000 rv = usb_autopm_get_interface(acm->control);
1001 if (rv < 0) {
1002 rv = -EIO;
1003 break;
1004 }
1005 rv = wait_serial_change(acm, arg);
1006 usb_autopm_put_interface(acm->control);
1007 break;
1008 }
1009
1010 return rv;
1011}
1012
1013static void acm_tty_set_termios(struct tty_struct *tty,
1014 struct ktermios *termios_old)
1015{
1016 struct acm *acm = tty->driver_data;
1017 struct ktermios *termios = &tty->termios;
1018 struct usb_cdc_line_coding newline;
1019 int newctrl = acm->ctrlout;
1020
1021 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1022 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1023 newline.bParityType = termios->c_cflag & PARENB ?
1024 (termios->c_cflag & PARODD ? 1 : 2) +
1025 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1026 switch (termios->c_cflag & CSIZE) {
1027 case CS5:
1028 newline.bDataBits = 5;
1029 break;
1030 case CS6:
1031 newline.bDataBits = 6;
1032 break;
1033 case CS7:
1034 newline.bDataBits = 7;
1035 break;
1036 case CS8:
1037 default:
1038 newline.bDataBits = 8;
1039 break;
1040 }
1041
1042 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1043
1044 if (C_BAUD(tty) == B0) {
1045 newline.dwDTERate = acm->line.dwDTERate;
1046 newctrl &= ~ACM_CTRL_DTR;
1047 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1048 newctrl |= ACM_CTRL_DTR;
1049 }
1050
1051 if (newctrl != acm->ctrlout)
1052 acm_set_control(acm, acm->ctrlout = newctrl);
1053
1054 if (memcmp(&acm->line, &newline, sizeof newline)) {
1055 memcpy(&acm->line, &newline, sizeof newline);
1056 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1057 __func__,
1058 le32_to_cpu(newline.dwDTERate),
1059 newline.bCharFormat, newline.bParityType,
1060 newline.bDataBits);
1061 acm_set_line(acm, &acm->line);
1062 }
1063}
1064
1065static const struct tty_port_operations acm_port_ops = {
1066 .dtr_rts = acm_port_dtr_rts,
1067 .shutdown = acm_port_shutdown,
1068 .activate = acm_port_activate,
1069 .destruct = acm_port_destruct,
1070};
1071
1072
1073
1074
1075
1076
1077static void acm_write_buffers_free(struct acm *acm)
1078{
1079 int i;
1080 struct acm_wb *wb;
1081
1082 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1083 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1084}
1085
1086static void acm_read_buffers_free(struct acm *acm)
1087{
1088 int i;
1089
1090 for (i = 0; i < acm->rx_buflimit; i++)
1091 usb_free_coherent(acm->dev, acm->readsize,
1092 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1093}
1094
1095
1096static int acm_write_buffers_alloc(struct acm *acm)
1097{
1098 int i;
1099 struct acm_wb *wb;
1100
1101 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1102 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1103 &wb->dmah);
1104 if (!wb->buf) {
1105 while (i != 0) {
1106 --i;
1107 --wb;
1108 usb_free_coherent(acm->dev, acm->writesize,
1109 wb->buf, wb->dmah);
1110 }
1111 return -ENOMEM;
1112 }
1113 }
1114 return 0;
1115}
1116
1117static int acm_probe(struct usb_interface *intf,
1118 const struct usb_device_id *id)
1119{
1120 struct usb_cdc_union_desc *union_header = NULL;
1121 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1122 unsigned char *buffer = intf->altsetting->extra;
1123 int buflen = intf->altsetting->extralen;
1124 struct usb_interface *control_interface;
1125 struct usb_interface *data_interface;
1126 struct usb_endpoint_descriptor *epctrl = NULL;
1127 struct usb_endpoint_descriptor *epread = NULL;
1128 struct usb_endpoint_descriptor *epwrite = NULL;
1129 struct usb_device *usb_dev = interface_to_usbdev(intf);
1130 struct usb_cdc_parsed_header h;
1131 struct acm *acm;
1132 int minor;
1133 int ctrlsize, readsize;
1134 u8 *buf;
1135 int call_intf_num = -1;
1136 int data_intf_num = -1;
1137 unsigned long quirks;
1138 int num_rx_buf;
1139 int i;
1140 int combined_interfaces = 0;
1141 struct device *tty_dev;
1142 int rv = -ENOMEM;
1143 int res;
1144
1145
1146 quirks = (unsigned long)id->driver_info;
1147
1148 if (quirks == IGNORE_DEVICE)
1149 return -ENODEV;
1150
1151 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1152
1153 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1154
1155
1156 if (quirks == NO_UNION_NORMAL) {
1157 data_interface = usb_ifnum_to_if(usb_dev, 1);
1158 control_interface = usb_ifnum_to_if(usb_dev, 0);
1159
1160 if (!data_interface || !control_interface)
1161 return -ENODEV;
1162 goto skip_normal_probe;
1163 }
1164
1165
1166 if (!buffer) {
1167 dev_err(&intf->dev, "Weird descriptor references\n");
1168 return -EINVAL;
1169 }
1170
1171 if (!intf->cur_altsetting)
1172 return -EINVAL;
1173
1174 if (!buflen) {
1175 if (intf->cur_altsetting->endpoint &&
1176 intf->cur_altsetting->endpoint->extralen &&
1177 intf->cur_altsetting->endpoint->extra) {
1178 dev_dbg(&intf->dev,
1179 "Seeking extra descriptors on endpoint\n");
1180 buflen = intf->cur_altsetting->endpoint->extralen;
1181 buffer = intf->cur_altsetting->endpoint->extra;
1182 } else {
1183 dev_err(&intf->dev,
1184 "Zero length descriptor references\n");
1185 return -EINVAL;
1186 }
1187 }
1188
1189 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1190 union_header = h.usb_cdc_union_desc;
1191 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1192 if (cmgmd)
1193 call_intf_num = cmgmd->bDataInterface;
1194
1195 if (!union_header) {
1196 if (call_intf_num > 0) {
1197 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1198
1199 if (quirks & NO_DATA_INTERFACE) {
1200 data_interface = usb_ifnum_to_if(usb_dev, 0);
1201 } else {
1202 data_intf_num = call_intf_num;
1203 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1204 }
1205 control_interface = intf;
1206 } else {
1207 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1208 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1209 return -ENODEV;
1210 } else {
1211 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1212 combined_interfaces = 1;
1213 control_interface = data_interface = intf;
1214 goto look_for_collapsed_interface;
1215 }
1216 }
1217 } else {
1218 data_intf_num = union_header->bSlaveInterface0;
1219 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1220 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1221 }
1222
1223 if (!control_interface || !data_interface) {
1224 dev_dbg(&intf->dev, "no interfaces\n");
1225 return -ENODEV;
1226 }
1227 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1228 return -ENODEV;
1229
1230 if (data_intf_num != call_intf_num)
1231 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1232
1233 if (control_interface == data_interface) {
1234
1235 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1236 combined_interfaces = 1;
1237
1238 quirks |= NO_CAP_LINE;
1239 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1240 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1241 return -EINVAL;
1242 }
1243look_for_collapsed_interface:
1244 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1245 &epread, &epwrite, &epctrl, NULL);
1246 if (res)
1247 return res;
1248
1249 goto made_compressed_probe;
1250 }
1251
1252skip_normal_probe:
1253
1254
1255 if (data_interface->cur_altsetting->desc.bInterfaceClass
1256 != CDC_DATA_INTERFACE_TYPE) {
1257 if (control_interface->cur_altsetting->desc.bInterfaceClass
1258 == CDC_DATA_INTERFACE_TYPE) {
1259 dev_dbg(&intf->dev,
1260 "Your device has switched interfaces.\n");
1261 swap(control_interface, data_interface);
1262 } else {
1263 return -EINVAL;
1264 }
1265 }
1266
1267
1268 if (!combined_interfaces && intf != control_interface)
1269 return -ENODEV;
1270
1271 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1272
1273 dev_dbg(&intf->dev, "The data interface isn't available\n");
1274 return -EBUSY;
1275 }
1276
1277
1278 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1279 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1280 return -EINVAL;
1281
1282 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1283 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1284 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1285
1286
1287
1288 if (!usb_endpoint_dir_in(epread)) {
1289
1290 dev_dbg(&intf->dev,
1291 "The data interface has switched endpoints\n");
1292 swap(epread, epwrite);
1293 }
1294made_compressed_probe:
1295 dev_dbg(&intf->dev, "interfaces are valid\n");
1296
1297 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1298 if (acm == NULL)
1299 goto alloc_fail;
1300
1301 tty_port_init(&acm->port);
1302 acm->port.ops = &acm_port_ops;
1303
1304 minor = acm_alloc_minor(acm);
1305 if (minor < 0)
1306 goto alloc_fail1;
1307
1308 ctrlsize = usb_endpoint_maxp(epctrl);
1309 readsize = usb_endpoint_maxp(epread) *
1310 (quirks == SINGLE_RX_URB ? 1 : 2);
1311 acm->combined_interfaces = combined_interfaces;
1312 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1313 acm->control = control_interface;
1314 acm->data = data_interface;
1315 acm->minor = minor;
1316 acm->dev = usb_dev;
1317 if (h.usb_cdc_acm_descriptor)
1318 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1319 if (quirks & NO_CAP_LINE)
1320 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1321 acm->ctrlsize = ctrlsize;
1322 acm->readsize = readsize;
1323 acm->rx_buflimit = num_rx_buf;
1324 INIT_WORK(&acm->work, acm_softint);
1325 init_waitqueue_head(&acm->wioctl);
1326 spin_lock_init(&acm->write_lock);
1327 spin_lock_init(&acm->read_lock);
1328 mutex_init(&acm->mutex);
1329 if (usb_endpoint_xfer_int(epread)) {
1330 acm->bInterval = epread->bInterval;
1331 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1332 } else {
1333 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1334 }
1335 if (usb_endpoint_xfer_int(epwrite))
1336 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1337 else
1338 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1339 init_usb_anchor(&acm->delayed);
1340 acm->quirks = quirks;
1341
1342 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1343 if (!buf)
1344 goto alloc_fail1;
1345 acm->ctrl_buffer = buf;
1346
1347 if (acm_write_buffers_alloc(acm) < 0)
1348 goto alloc_fail2;
1349
1350 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1351 if (!acm->ctrlurb)
1352 goto alloc_fail3;
1353
1354 for (i = 0; i < num_rx_buf; i++) {
1355 struct acm_rb *rb = &(acm->read_buffers[i]);
1356 struct urb *urb;
1357
1358 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1359 &rb->dma);
1360 if (!rb->base)
1361 goto alloc_fail4;
1362 rb->index = i;
1363 rb->instance = acm;
1364
1365 urb = usb_alloc_urb(0, GFP_KERNEL);
1366 if (!urb)
1367 goto alloc_fail4;
1368
1369 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1370 urb->transfer_dma = rb->dma;
1371 if (usb_endpoint_xfer_int(epread))
1372 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1373 acm->readsize,
1374 acm_read_bulk_callback, rb,
1375 acm->bInterval);
1376 else
1377 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1378 acm->readsize,
1379 acm_read_bulk_callback, rb);
1380
1381 acm->read_urbs[i] = urb;
1382 __set_bit(i, &acm->read_urbs_free);
1383 }
1384 for (i = 0; i < ACM_NW; i++) {
1385 struct acm_wb *snd = &(acm->wb[i]);
1386
1387 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1388 if (snd->urb == NULL)
1389 goto alloc_fail5;
1390
1391 if (usb_endpoint_xfer_int(epwrite))
1392 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1393 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1394 else
1395 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1396 NULL, acm->writesize, acm_write_bulk, snd);
1397 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1398 if (quirks & SEND_ZERO_PACKET)
1399 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1400 snd->instance = acm;
1401 }
1402
1403 usb_set_intfdata(intf, acm);
1404
1405 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1406 if (i < 0)
1407 goto alloc_fail5;
1408
1409 if (h.usb_cdc_country_functional_desc) {
1410 struct usb_cdc_country_functional_desc * cfd =
1411 h.usb_cdc_country_functional_desc;
1412
1413 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1414 if (!acm->country_codes)
1415 goto skip_countries;
1416 acm->country_code_size = cfd->bLength - 4;
1417 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1418 cfd->bLength - 4);
1419 acm->country_rel_date = cfd->iCountryCodeRelDate;
1420
1421 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1422 if (i < 0) {
1423 kfree(acm->country_codes);
1424 acm->country_codes = NULL;
1425 acm->country_code_size = 0;
1426 goto skip_countries;
1427 }
1428
1429 i = device_create_file(&intf->dev,
1430 &dev_attr_iCountryCodeRelDate);
1431 if (i < 0) {
1432 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1433 kfree(acm->country_codes);
1434 acm->country_codes = NULL;
1435 acm->country_code_size = 0;
1436 goto skip_countries;
1437 }
1438 }
1439
1440skip_countries:
1441 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1442 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1443 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1444
1445 epctrl->bInterval ? epctrl->bInterval : 16);
1446 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1447 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1448 acm->notification_buffer = NULL;
1449 acm->nb_index = 0;
1450 acm->nb_size = 0;
1451
1452 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1453
1454 acm->line.dwDTERate = cpu_to_le32(9600);
1455 acm->line.bDataBits = 8;
1456 acm_set_line(acm, &acm->line);
1457
1458 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1459 usb_set_intfdata(data_interface, acm);
1460
1461 usb_get_intf(control_interface);
1462 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1463 &control_interface->dev);
1464 if (IS_ERR(tty_dev)) {
1465 rv = PTR_ERR(tty_dev);
1466 goto alloc_fail6;
1467 }
1468
1469 if (quirks & CLEAR_HALT_CONDITIONS) {
1470 usb_clear_halt(usb_dev, acm->in);
1471 usb_clear_halt(usb_dev, acm->out);
1472 }
1473
1474 return 0;
1475alloc_fail6:
1476 if (acm->country_codes) {
1477 device_remove_file(&acm->control->dev,
1478 &dev_attr_wCountryCodes);
1479 device_remove_file(&acm->control->dev,
1480 &dev_attr_iCountryCodeRelDate);
1481 kfree(acm->country_codes);
1482 }
1483 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1484alloc_fail5:
1485 usb_set_intfdata(intf, NULL);
1486 for (i = 0; i < ACM_NW; i++)
1487 usb_free_urb(acm->wb[i].urb);
1488alloc_fail4:
1489 for (i = 0; i < num_rx_buf; i++)
1490 usb_free_urb(acm->read_urbs[i]);
1491 acm_read_buffers_free(acm);
1492 usb_free_urb(acm->ctrlurb);
1493alloc_fail3:
1494 acm_write_buffers_free(acm);
1495alloc_fail2:
1496 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1497alloc_fail1:
1498 tty_port_put(&acm->port);
1499alloc_fail:
1500 return rv;
1501}
1502
1503static void acm_disconnect(struct usb_interface *intf)
1504{
1505 struct acm *acm = usb_get_intfdata(intf);
1506 struct tty_struct *tty;
1507 int i;
1508
1509
1510 if (!acm)
1511 return;
1512
1513 mutex_lock(&acm->mutex);
1514 acm->disconnected = true;
1515 if (acm->country_codes) {
1516 device_remove_file(&acm->control->dev,
1517 &dev_attr_wCountryCodes);
1518 device_remove_file(&acm->control->dev,
1519 &dev_attr_iCountryCodeRelDate);
1520 }
1521 wake_up_all(&acm->wioctl);
1522 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1523 usb_set_intfdata(acm->control, NULL);
1524 usb_set_intfdata(acm->data, NULL);
1525 mutex_unlock(&acm->mutex);
1526
1527 tty = tty_port_tty_get(&acm->port);
1528 if (tty) {
1529 tty_vhangup(tty);
1530 tty_kref_put(tty);
1531 }
1532
1533 acm_kill_urbs(acm);
1534 cancel_work_sync(&acm->work);
1535
1536 tty_unregister_device(acm_tty_driver, acm->minor);
1537
1538 usb_free_urb(acm->ctrlurb);
1539 for (i = 0; i < ACM_NW; i++)
1540 usb_free_urb(acm->wb[i].urb);
1541 for (i = 0; i < acm->rx_buflimit; i++)
1542 usb_free_urb(acm->read_urbs[i]);
1543 acm_write_buffers_free(acm);
1544 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1545 acm_read_buffers_free(acm);
1546
1547 kfree(acm->notification_buffer);
1548
1549 if (!acm->combined_interfaces)
1550 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1551 acm->data : acm->control);
1552
1553 tty_port_put(&acm->port);
1554}
1555
1556#ifdef CONFIG_PM
1557static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1558{
1559 struct acm *acm = usb_get_intfdata(intf);
1560 int cnt;
1561
1562 spin_lock_irq(&acm->write_lock);
1563 if (PMSG_IS_AUTO(message)) {
1564 if (acm->transmitting) {
1565 spin_unlock_irq(&acm->write_lock);
1566 return -EBUSY;
1567 }
1568 }
1569 cnt = acm->susp_count++;
1570 spin_unlock_irq(&acm->write_lock);
1571
1572 if (cnt)
1573 return 0;
1574
1575 acm_kill_urbs(acm);
1576 cancel_work_sync(&acm->work);
1577
1578 return 0;
1579}
1580
1581static int acm_resume(struct usb_interface *intf)
1582{
1583 struct acm *acm = usb_get_intfdata(intf);
1584 struct urb *urb;
1585 int rv = 0;
1586
1587 spin_lock_irq(&acm->write_lock);
1588
1589 if (--acm->susp_count)
1590 goto out;
1591
1592 if (tty_port_initialized(&acm->port)) {
1593 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1594
1595 for (;;) {
1596 urb = usb_get_from_anchor(&acm->delayed);
1597 if (!urb)
1598 break;
1599
1600 acm_start_wb(acm, urb->context);
1601 }
1602
1603
1604
1605
1606
1607 if (rv < 0)
1608 goto out;
1609
1610 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1611 }
1612out:
1613 spin_unlock_irq(&acm->write_lock);
1614
1615 return rv;
1616}
1617
1618static int acm_reset_resume(struct usb_interface *intf)
1619{
1620 struct acm *acm = usb_get_intfdata(intf);
1621
1622 if (tty_port_initialized(&acm->port))
1623 tty_port_tty_hangup(&acm->port, false);
1624
1625 return acm_resume(intf);
1626}
1627
1628#endif
1629
1630static int acm_pre_reset(struct usb_interface *intf)
1631{
1632 struct acm *acm = usb_get_intfdata(intf);
1633
1634 clear_bit(EVENT_RX_STALL, &acm->flags);
1635 acm->nb_index = 0;
1636
1637 return 0;
1638}
1639
1640#define NOKIA_PCSUITE_ACM_INFO(x) \
1641 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1642 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1643 USB_CDC_ACM_PROTO_VENDOR)
1644
1645#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1646 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1647 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1648 USB_CDC_ACM_PROTO_VENDOR)
1649
1650
1651
1652
1653
1654static const struct usb_device_id acm_ids[] = {
1655
1656 { USB_DEVICE(0x076d, 0x0006),
1657 .driver_info = NO_UNION_NORMAL, },
1658 { USB_DEVICE(0x17ef, 0x7000),
1659 .driver_info = NO_UNION_NORMAL, },
1660 { USB_DEVICE(0x0870, 0x0001),
1661 .driver_info = NO_UNION_NORMAL,
1662 },
1663 { USB_DEVICE(0x0e8d, 0x0003),
1664 .driver_info = NO_UNION_NORMAL,
1665 },
1666 { USB_DEVICE(0x0e8d, 0x2000),
1667 .driver_info = DISABLE_ECHO,
1668 },
1669 { USB_DEVICE(0x0e8d, 0x3329),
1670 .driver_info = NO_UNION_NORMAL,
1671 },
1672 { USB_DEVICE(0x0482, 0x0203),
1673 .driver_info = NO_UNION_NORMAL,
1674 },
1675 { USB_DEVICE(0x079b, 0x000f),
1676 .driver_info = NO_UNION_NORMAL,
1677 },
1678 { USB_DEVICE(0x0ace, 0x1602),
1679 .driver_info = SINGLE_RX_URB,
1680 },
1681 { USB_DEVICE(0x0ace, 0x1608),
1682 .driver_info = SINGLE_RX_URB,
1683 },
1684 { USB_DEVICE(0x0ace, 0x1611),
1685 .driver_info = SINGLE_RX_URB,
1686 },
1687 { USB_DEVICE(0x11ca, 0x0201),
1688 .driver_info = SINGLE_RX_URB,
1689 },
1690 { USB_DEVICE(0x1965, 0x0018),
1691 .driver_info = NO_UNION_NORMAL,
1692 },
1693 { USB_DEVICE(0x22b8, 0x7000),
1694 .driver_info = NO_UNION_NORMAL,
1695 },
1696 { USB_DEVICE(0x0803, 0x3095),
1697 .driver_info = NO_UNION_NORMAL,
1698 },
1699 { USB_DEVICE(0x0572, 0x1321),
1700 .driver_info = NO_UNION_NORMAL,
1701 },
1702 { USB_DEVICE(0x0572, 0x1324),
1703 .driver_info = NO_UNION_NORMAL,
1704 },
1705 { USB_DEVICE(0x0572, 0x1328),
1706 .driver_info = NO_UNION_NORMAL,
1707 },
1708 { USB_DEVICE(0x0572, 0x1349),
1709 .driver_info = NO_UNION_NORMAL,
1710 },
1711 { USB_DEVICE(0x20df, 0x0001),
1712 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1713 { USB_DEVICE(0x2184, 0x001c) },
1714 { USB_DEVICE(0x2184, 0x0036) },
1715 { USB_DEVICE(0x22b8, 0x6425),
1716 },
1717
1718 { USB_DEVICE(0x22b8, 0x2d91) },
1719 { USB_DEVICE(0x22b8, 0x2d92),
1720 .driver_info = NO_UNION_NORMAL,
1721 },
1722 { USB_DEVICE(0x22b8, 0x2d93),
1723 .driver_info = NO_UNION_NORMAL,
1724 },
1725 { USB_DEVICE(0x22b8, 0x2d95),
1726 .driver_info = NO_UNION_NORMAL,
1727 },
1728 { USB_DEVICE(0x22b8, 0x2d96),
1729 .driver_info = NO_UNION_NORMAL,
1730 },
1731 { USB_DEVICE(0x22b8, 0x2d97),
1732 .driver_info = NO_UNION_NORMAL,
1733 },
1734 { USB_DEVICE(0x22b8, 0x2d99),
1735 .driver_info = NO_UNION_NORMAL,
1736 },
1737 { USB_DEVICE(0x22b8, 0x2d9a),
1738 .driver_info = NO_UNION_NORMAL,
1739 },
1740
1741 { USB_DEVICE(0x0572, 0x1329),
1742 .driver_info = NO_UNION_NORMAL,
1743
1744
1745
1746
1747 },
1748 { USB_DEVICE(0x0572, 0x1340),
1749 .driver_info = NO_UNION_NORMAL,
1750 },
1751 { USB_DEVICE(0x05f9, 0x4002),
1752 .driver_info = NO_UNION_NORMAL,
1753 },
1754 { USB_DEVICE(0x1bbb, 0x0003),
1755 .driver_info = NO_UNION_NORMAL,
1756 },
1757 { USB_DEVICE(0x1576, 0x03b1),
1758 .driver_info = NO_UNION_NORMAL,
1759 },
1760 { USB_DEVICE(0xfff0, 0x0100),
1761 .driver_info = NO_UNION_NORMAL,
1762 },
1763 { USB_DEVICE(0x09d8, 0x0320),
1764 .driver_info = NO_UNION_NORMAL,
1765 },
1766 { USB_DEVICE(0x0ca6, 0xa050),
1767 .driver_info = NO_UNION_NORMAL,
1768 },
1769
1770 { USB_DEVICE(0x2912, 0x0001),
1771 .driver_info = CLEAR_HALT_CONDITIONS,
1772 },
1773
1774
1775
1776
1777
1778
1779 { NOKIA_PCSUITE_ACM_INFO(0x042D), },
1780 { NOKIA_PCSUITE_ACM_INFO(0x04D8), },
1781 { NOKIA_PCSUITE_ACM_INFO(0x04C9), },
1782 { NOKIA_PCSUITE_ACM_INFO(0x0419), },
1783 { NOKIA_PCSUITE_ACM_INFO(0x044D), },
1784 { NOKIA_PCSUITE_ACM_INFO(0x0001), },
1785 { NOKIA_PCSUITE_ACM_INFO(0x0475), },
1786 { NOKIA_PCSUITE_ACM_INFO(0x0508), },
1787 { NOKIA_PCSUITE_ACM_INFO(0x0418), },
1788 { NOKIA_PCSUITE_ACM_INFO(0x0425), },
1789 { NOKIA_PCSUITE_ACM_INFO(0x0486), },
1790 { NOKIA_PCSUITE_ACM_INFO(0x04DF), },
1791 { NOKIA_PCSUITE_ACM_INFO(0x000e), },
1792 { NOKIA_PCSUITE_ACM_INFO(0x0445), },
1793 { NOKIA_PCSUITE_ACM_INFO(0x042F), },
1794 { NOKIA_PCSUITE_ACM_INFO(0x048E), },
1795 { NOKIA_PCSUITE_ACM_INFO(0x0420), },
1796 { NOKIA_PCSUITE_ACM_INFO(0x04E6), },
1797 { NOKIA_PCSUITE_ACM_INFO(0x04B2), },
1798 { NOKIA_PCSUITE_ACM_INFO(0x0134), },
1799 { NOKIA_PCSUITE_ACM_INFO(0x046E), },
1800 { NOKIA_PCSUITE_ACM_INFO(0x002f), },
1801 { NOKIA_PCSUITE_ACM_INFO(0x0088), },
1802 { NOKIA_PCSUITE_ACM_INFO(0x00fc), },
1803 { NOKIA_PCSUITE_ACM_INFO(0x0042), },
1804 { NOKIA_PCSUITE_ACM_INFO(0x00b0), },
1805 { NOKIA_PCSUITE_ACM_INFO(0x00ab), },
1806 { NOKIA_PCSUITE_ACM_INFO(0x0481), },
1807 { NOKIA_PCSUITE_ACM_INFO(0x0007), },
1808 { NOKIA_PCSUITE_ACM_INFO(0x0071), },
1809 { NOKIA_PCSUITE_ACM_INFO(0x04F0), },
1810 { NOKIA_PCSUITE_ACM_INFO(0x0070), },
1811 { NOKIA_PCSUITE_ACM_INFO(0x00e9), },
1812 { NOKIA_PCSUITE_ACM_INFO(0x0099), },
1813 { NOKIA_PCSUITE_ACM_INFO(0x0128), },
1814 { NOKIA_PCSUITE_ACM_INFO(0x008f), },
1815 { NOKIA_PCSUITE_ACM_INFO(0x00a0), },
1816 { NOKIA_PCSUITE_ACM_INFO(0x007b), },
1817 { NOKIA_PCSUITE_ACM_INFO(0x0094), },
1818 { NOKIA_PCSUITE_ACM_INFO(0x003a), },
1819 { NOKIA_PCSUITE_ACM_INFO(0x00e9), },
1820 { NOKIA_PCSUITE_ACM_INFO(0x0108), },
1821 { NOKIA_PCSUITE_ACM_INFO(0x01f5), },
1822 { NOKIA_PCSUITE_ACM_INFO(0x02e3), },
1823 { NOKIA_PCSUITE_ACM_INFO(0x0178), },
1824 { NOKIA_PCSUITE_ACM_INFO(0x010e), },
1825 { NOKIA_PCSUITE_ACM_INFO(0x02d9), },
1826 { NOKIA_PCSUITE_ACM_INFO(0x01d0), },
1827 { NOKIA_PCSUITE_ACM_INFO(0x0223), },
1828 { NOKIA_PCSUITE_ACM_INFO(0x0275), },
1829 { NOKIA_PCSUITE_ACM_INFO(0x026c), },
1830 { NOKIA_PCSUITE_ACM_INFO(0x0154), },
1831 { NOKIA_PCSUITE_ACM_INFO(0x04ce), },
1832 { NOKIA_PCSUITE_ACM_INFO(0x01d4), },
1833 { NOKIA_PCSUITE_ACM_INFO(0x0302), },
1834 { NOKIA_PCSUITE_ACM_INFO(0x0335), },
1835 { NOKIA_PCSUITE_ACM_INFO(0x03cd), },
1836 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), },
1837
1838
1839 { USB_DEVICE(0x03eb, 0x0030), },
1840
1841
1842
1843
1844 { USB_DEVICE(0x04d8, 0x000b),
1845 .driver_info = NO_DATA_INTERFACE,
1846 },
1847
1848#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1849 { USB_DEVICE(0x04d8, 0x0082),
1850 .driver_info = IGNORE_DEVICE,
1851 },
1852 { USB_DEVICE(0x04d8, 0x0083),
1853 .driver_info = IGNORE_DEVICE,
1854 },
1855#endif
1856
1857
1858 { USB_DEVICE(0x04e8, 0x685d),
1859 .driver_info = IGNORE_DEVICE,
1860 },
1861
1862
1863 { USB_DEVICE(0x058b, 0x0041),
1864 .driver_info = IGNORE_DEVICE,
1865 },
1866
1867 { USB_DEVICE(0x1bc7, 0x0021),
1868 .driver_info = SEND_ZERO_PACKET,
1869 },
1870 { USB_DEVICE(0x1bc7, 0x0023),
1871 .driver_info = SEND_ZERO_PACKET,
1872 },
1873
1874
1875 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1876 USB_CDC_PROTO_NONE) },
1877
1878
1879 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1880 USB_CDC_ACM_PROTO_AT_V25TER) },
1881 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1882 USB_CDC_ACM_PROTO_AT_PCCA101) },
1883 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1884 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1885 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1886 USB_CDC_ACM_PROTO_AT_GSM) },
1887 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1888 USB_CDC_ACM_PROTO_AT_3G) },
1889 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1890 USB_CDC_ACM_PROTO_AT_CDMA) },
1891
1892 { USB_DEVICE(0x1519, 0x0452),
1893 .driver_info = SEND_ZERO_PACKET,
1894 },
1895
1896 { }
1897};
1898
1899MODULE_DEVICE_TABLE(usb, acm_ids);
1900
1901static struct usb_driver acm_driver = {
1902 .name = "cdc_acm",
1903 .probe = acm_probe,
1904 .disconnect = acm_disconnect,
1905#ifdef CONFIG_PM
1906 .suspend = acm_suspend,
1907 .resume = acm_resume,
1908 .reset_resume = acm_reset_resume,
1909#endif
1910 .pre_reset = acm_pre_reset,
1911 .id_table = acm_ids,
1912#ifdef CONFIG_PM
1913 .supports_autosuspend = 1,
1914#endif
1915 .disable_hub_initiated_lpm = 1,
1916};
1917
1918
1919
1920
1921
1922static const struct tty_operations acm_ops = {
1923 .install = acm_tty_install,
1924 .open = acm_tty_open,
1925 .close = acm_tty_close,
1926 .cleanup = acm_tty_cleanup,
1927 .hangup = acm_tty_hangup,
1928 .write = acm_tty_write,
1929 .write_room = acm_tty_write_room,
1930 .ioctl = acm_tty_ioctl,
1931 .throttle = acm_tty_throttle,
1932 .unthrottle = acm_tty_unthrottle,
1933 .chars_in_buffer = acm_tty_chars_in_buffer,
1934 .break_ctl = acm_tty_break_ctl,
1935 .set_termios = acm_tty_set_termios,
1936 .tiocmget = acm_tty_tiocmget,
1937 .tiocmset = acm_tty_tiocmset,
1938 .get_serial = get_serial_info,
1939 .set_serial = set_serial_info,
1940 .get_icount = acm_tty_get_icount,
1941};
1942
1943
1944
1945
1946
1947static int __init acm_init(void)
1948{
1949 int retval;
1950 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1951 if (!acm_tty_driver)
1952 return -ENOMEM;
1953 acm_tty_driver->driver_name = "acm",
1954 acm_tty_driver->name = "ttyACM",
1955 acm_tty_driver->major = ACM_TTY_MAJOR,
1956 acm_tty_driver->minor_start = 0,
1957 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1958 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1959 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1960 acm_tty_driver->init_termios = tty_std_termios;
1961 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1962 HUPCL | CLOCAL;
1963 tty_set_operations(acm_tty_driver, &acm_ops);
1964
1965 retval = tty_register_driver(acm_tty_driver);
1966 if (retval) {
1967 put_tty_driver(acm_tty_driver);
1968 return retval;
1969 }
1970
1971 retval = usb_register(&acm_driver);
1972 if (retval) {
1973 tty_unregister_driver(acm_tty_driver);
1974 put_tty_driver(acm_tty_driver);
1975 return retval;
1976 }
1977
1978 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1979
1980 return 0;
1981}
1982
1983static void __exit acm_exit(void)
1984{
1985 usb_deregister(&acm_driver);
1986 tty_unregister_driver(acm_tty_driver);
1987 put_tty_driver(acm_tty_driver);
1988 idr_destroy(&acm_minors);
1989}
1990
1991module_init(acm_init);
1992module_exit(acm_exit);
1993
1994MODULE_AUTHOR(DRIVER_AUTHOR);
1995MODULE_DESCRIPTION(DRIVER_DESC);
1996MODULE_LICENSE("GPL");
1997MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
1998
