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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 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
280 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
281
282 switch (dr->bNotificationType) {
283 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
284 dev_dbg(&acm->control->dev,
285 "%s - network connection: %d\n", __func__, dr->wValue);
286 break;
287
288 case USB_CDC_NOTIFY_SERIAL_STATE:
289 if (le16_to_cpu(dr->wLength) != 2) {
290 dev_dbg(&acm->control->dev,
291 "%s - malformed serial state\n", __func__);
292 break;
293 }
294
295 newctrl = get_unaligned_le16(data);
296 dev_dbg(&acm->control->dev,
297 "%s - serial state: 0x%x\n", __func__, newctrl);
298
299 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
300 dev_dbg(&acm->control->dev,
301 "%s - calling hangup\n", __func__);
302 tty_port_tty_hangup(&acm->port, false);
303 }
304
305 difference = acm->ctrlin ^ newctrl;
306 spin_lock(&acm->read_lock);
307 acm->ctrlin = newctrl;
308 acm->oldcount = acm->iocount;
309
310 if (difference & ACM_CTRL_DSR)
311 acm->iocount.dsr++;
312 if (difference & ACM_CTRL_BRK)
313 acm->iocount.brk++;
314 if (difference & ACM_CTRL_RI)
315 acm->iocount.rng++;
316 if (difference & ACM_CTRL_DCD)
317 acm->iocount.dcd++;
318 if (difference & ACM_CTRL_FRAMING)
319 acm->iocount.frame++;
320 if (difference & ACM_CTRL_PARITY)
321 acm->iocount.parity++;
322 if (difference & ACM_CTRL_OVERRUN)
323 acm->iocount.overrun++;
324 spin_unlock(&acm->read_lock);
325
326 if (difference)
327 wake_up_all(&acm->wioctl);
328
329 break;
330
331 default:
332 dev_dbg(&acm->control->dev,
333 "%s - unknown notification %d received: index %d len %d\n",
334 __func__,
335 dr->bNotificationType, dr->wIndex, dr->wLength);
336 }
337}
338
339
340static void acm_ctrl_irq(struct urb *urb)
341{
342 struct acm *acm = urb->context;
343 struct usb_cdc_notification *dr = urb->transfer_buffer;
344 unsigned int current_size = urb->actual_length;
345 unsigned int expected_size, copy_size, alloc_size;
346 int retval;
347 int status = urb->status;
348
349 switch (status) {
350 case 0:
351
352 break;
353 case -ECONNRESET:
354 case -ENOENT:
355 case -ESHUTDOWN:
356
357 acm->nb_index = 0;
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 unsigned long flags;
472 int status = urb->status;
473
474 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
475 rb->index, urb->actual_length, status);
476
477 set_bit(rb->index, &acm->read_urbs_free);
478
479 if (!acm->dev) {
480 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
481 return;
482 }
483
484 switch (status) {
485 case 0:
486 usb_mark_last_busy(acm->dev);
487 acm_process_read_urb(acm, urb);
488 break;
489 case -EPIPE:
490 set_bit(EVENT_RX_STALL, &acm->flags);
491 schedule_work(&acm->work);
492 return;
493 case -ENOENT:
494 case -ECONNRESET:
495 case -ESHUTDOWN:
496 dev_dbg(&acm->data->dev,
497 "%s - urb shutting down with status: %d\n",
498 __func__, status);
499 return;
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 smp_mb__before_atomic();
512
513
514 spin_lock_irqsave(&acm->read_lock, flags);
515 acm->throttled = acm->throttle_req;
516 if (!acm->throttled) {
517 spin_unlock_irqrestore(&acm->read_lock, flags);
518 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
519 } else {
520 spin_unlock_irqrestore(&acm->read_lock, flags);
521 }
522}
523
524
525static void acm_write_bulk(struct urb *urb)
526{
527 struct acm_wb *wb = urb->context;
528 struct acm *acm = wb->instance;
529 unsigned long flags;
530 int status = urb->status;
531
532 if (status || (urb->actual_length != urb->transfer_buffer_length))
533 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
534 urb->actual_length,
535 urb->transfer_buffer_length,
536 status);
537
538 spin_lock_irqsave(&acm->write_lock, flags);
539 acm_write_done(acm, wb);
540 spin_unlock_irqrestore(&acm->write_lock, flags);
541 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
542 schedule_work(&acm->work);
543}
544
545static void acm_softint(struct work_struct *work)
546{
547 int i;
548 struct acm *acm = container_of(work, struct acm, work);
549
550 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
551 if (!(usb_autopm_get_interface(acm->data))) {
552 for (i = 0; i < acm->rx_buflimit; i++)
553 usb_kill_urb(acm->read_urbs[i]);
554 usb_clear_halt(acm->dev, acm->in);
555 acm_submit_read_urbs(acm, GFP_KERNEL);
556 usb_autopm_put_interface(acm->data);
557 }
558 clear_bit(EVENT_RX_STALL, &acm->flags);
559 }
560
561 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) {
562 tty_port_tty_wakeup(&acm->port);
563 clear_bit(EVENT_TTY_WAKEUP, &acm->flags);
564 }
565}
566
567
568
569
570
571static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
572{
573 struct acm *acm;
574 int retval;
575
576 acm = acm_get_by_minor(tty->index);
577 if (!acm)
578 return -ENODEV;
579
580 retval = tty_standard_install(driver, tty);
581 if (retval)
582 goto error_init_termios;
583
584 tty->driver_data = acm;
585
586 return 0;
587
588error_init_termios:
589 tty_port_put(&acm->port);
590 return retval;
591}
592
593static int acm_tty_open(struct tty_struct *tty, struct file *filp)
594{
595 struct acm *acm = tty->driver_data;
596
597 return tty_port_open(&acm->port, tty, filp);
598}
599
600static void acm_port_dtr_rts(struct tty_port *port, int raise)
601{
602 struct acm *acm = container_of(port, struct acm, port);
603 int val;
604 int res;
605
606 if (raise)
607 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
608 else
609 val = 0;
610
611
612 acm->ctrlout = val;
613
614 res = acm_set_control(acm, val);
615 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
616 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
617}
618
619static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
620{
621 struct acm *acm = container_of(port, struct acm, port);
622 int retval = -ENODEV;
623 int i;
624
625 mutex_lock(&acm->mutex);
626 if (acm->disconnected)
627 goto disconnected;
628
629 retval = usb_autopm_get_interface(acm->control);
630 if (retval)
631 goto error_get_interface;
632
633
634
635
636
637 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
638 acm->control->needs_remote_wakeup = 1;
639
640 acm->ctrlurb->dev = acm->dev;
641 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
642 if (retval) {
643 dev_err(&acm->control->dev,
644 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
645 goto error_submit_urb;
646 }
647
648 acm_tty_set_termios(tty, NULL);
649
650
651
652
653 spin_lock_irq(&acm->read_lock);
654 acm->throttled = 0;
655 acm->throttle_req = 0;
656 spin_unlock_irq(&acm->read_lock);
657
658 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
659 if (retval)
660 goto error_submit_read_urbs;
661
662 usb_autopm_put_interface(acm->control);
663
664 mutex_unlock(&acm->mutex);
665
666 return 0;
667
668error_submit_read_urbs:
669 for (i = 0; i < acm->rx_buflimit; i++)
670 usb_kill_urb(acm->read_urbs[i]);
671 usb_kill_urb(acm->ctrlurb);
672error_submit_urb:
673 usb_autopm_put_interface(acm->control);
674error_get_interface:
675disconnected:
676 mutex_unlock(&acm->mutex);
677
678 return usb_translate_errors(retval);
679}
680
681static void acm_port_destruct(struct tty_port *port)
682{
683 struct acm *acm = container_of(port, struct acm, port);
684
685 acm_release_minor(acm);
686 usb_put_intf(acm->control);
687 kfree(acm->country_codes);
688 kfree(acm);
689}
690
691static void acm_port_shutdown(struct tty_port *port)
692{
693 struct acm *acm = container_of(port, struct acm, port);
694 struct urb *urb;
695 struct acm_wb *wb;
696
697
698
699
700
701 spin_lock_irq(&acm->write_lock);
702 spin_unlock_irq(&acm->write_lock);
703
704 usb_autopm_get_interface_no_resume(acm->control);
705 acm->control->needs_remote_wakeup = 0;
706 usb_autopm_put_interface(acm->control);
707
708 for (;;) {
709 urb = usb_get_from_anchor(&acm->delayed);
710 if (!urb)
711 break;
712 wb = urb->context;
713 wb->use = 0;
714 usb_autopm_put_interface_async(acm->control);
715 }
716
717 acm_kill_urbs(acm);
718}
719
720static void acm_tty_cleanup(struct tty_struct *tty)
721{
722 struct acm *acm = tty->driver_data;
723
724 tty_port_put(&acm->port);
725}
726
727static void acm_tty_hangup(struct tty_struct *tty)
728{
729 struct acm *acm = tty->driver_data;
730
731 tty_port_hangup(&acm->port);
732}
733
734static void acm_tty_close(struct tty_struct *tty, struct file *filp)
735{
736 struct acm *acm = tty->driver_data;
737
738 tty_port_close(&acm->port, tty, filp);
739}
740
741static int acm_tty_write(struct tty_struct *tty,
742 const unsigned char *buf, int count)
743{
744 struct acm *acm = tty->driver_data;
745 int stat;
746 unsigned long flags;
747 int wbn;
748 struct acm_wb *wb;
749
750 if (!count)
751 return 0;
752
753 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
754
755 spin_lock_irqsave(&acm->write_lock, flags);
756 wbn = acm_wb_alloc(acm);
757 if (wbn < 0) {
758 spin_unlock_irqrestore(&acm->write_lock, flags);
759 return 0;
760 }
761 wb = &acm->wb[wbn];
762
763 if (!acm->dev) {
764 wb->use = 0;
765 spin_unlock_irqrestore(&acm->write_lock, flags);
766 return -ENODEV;
767 }
768
769 count = (count > acm->writesize) ? acm->writesize : count;
770 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
771 memcpy(wb->buf, buf, count);
772 wb->len = count;
773
774 stat = usb_autopm_get_interface_async(acm->control);
775 if (stat) {
776 wb->use = 0;
777 spin_unlock_irqrestore(&acm->write_lock, flags);
778 return stat;
779 }
780
781 if (acm->susp_count) {
782 if (acm->putbuffer) {
783
784 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
785 acm->putbuffer = NULL;
786 }
787 usb_anchor_urb(wb->urb, &acm->delayed);
788 spin_unlock_irqrestore(&acm->write_lock, flags);
789 return count;
790 } else {
791 if (acm->putbuffer) {
792
793 acm_start_wb(acm, acm->putbuffer);
794 acm->putbuffer = NULL;
795 }
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 void acm_tty_flush_chars(struct tty_struct *tty)
807{
808 struct acm *acm = tty->driver_data;
809 struct acm_wb *cur;
810 int err;
811 unsigned long flags;
812
813 spin_lock_irqsave(&acm->write_lock, flags);
814
815 cur = acm->putbuffer;
816 if (!cur)
817 goto out;
818
819 acm->putbuffer = NULL;
820 err = usb_autopm_get_interface_async(acm->control);
821 if (err < 0) {
822 cur->use = 0;
823 acm->putbuffer = cur;
824 goto out;
825 }
826
827 if (acm->susp_count)
828 usb_anchor_urb(cur->urb, &acm->delayed);
829 else
830 acm_start_wb(acm, cur);
831out:
832 spin_unlock_irqrestore(&acm->write_lock, flags);
833 return;
834}
835
836static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
837{
838 struct acm *acm = tty->driver_data;
839 struct acm_wb *cur;
840 int wbn;
841 unsigned long flags;
842
843overflow:
844 cur = acm->putbuffer;
845 if (!cur) {
846 spin_lock_irqsave(&acm->write_lock, flags);
847 wbn = acm_wb_alloc(acm);
848 if (wbn >= 0) {
849 cur = &acm->wb[wbn];
850 acm->putbuffer = cur;
851 }
852 spin_unlock_irqrestore(&acm->write_lock, flags);
853 if (!cur)
854 return 0;
855 }
856
857 if (cur->len == acm->writesize) {
858 acm_tty_flush_chars(tty);
859 goto overflow;
860 }
861
862 cur->buf[cur->len++] = ch;
863 return 1;
864}
865
866static int acm_tty_write_room(struct tty_struct *tty)
867{
868 struct acm *acm = tty->driver_data;
869
870
871
872
873 return acm_wb_is_avail(acm) ? acm->writesize : 0;
874}
875
876static int acm_tty_chars_in_buffer(struct tty_struct *tty)
877{
878 struct acm *acm = tty->driver_data;
879
880
881
882
883 if (acm->disconnected)
884 return 0;
885
886
887
888 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
889}
890
891static void acm_tty_throttle(struct tty_struct *tty)
892{
893 struct acm *acm = tty->driver_data;
894
895 spin_lock_irq(&acm->read_lock);
896 acm->throttle_req = 1;
897 spin_unlock_irq(&acm->read_lock);
898}
899
900static void acm_tty_unthrottle(struct tty_struct *tty)
901{
902 struct acm *acm = tty->driver_data;
903 unsigned int was_throttled;
904
905 spin_lock_irq(&acm->read_lock);
906 was_throttled = acm->throttled;
907 acm->throttled = 0;
908 acm->throttle_req = 0;
909 spin_unlock_irq(&acm->read_lock);
910
911 if (was_throttled)
912 acm_submit_read_urbs(acm, GFP_KERNEL);
913}
914
915static int acm_tty_break_ctl(struct tty_struct *tty, int state)
916{
917 struct acm *acm = tty->driver_data;
918 int retval;
919
920 retval = acm_send_break(acm, state ? 0xffff : 0);
921 if (retval < 0)
922 dev_dbg(&acm->control->dev,
923 "%s - send break failed\n", __func__);
924 return retval;
925}
926
927static int acm_tty_tiocmget(struct tty_struct *tty)
928{
929 struct acm *acm = tty->driver_data;
930
931 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
932 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
933 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
934 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
935 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
936 TIOCM_CTS;
937}
938
939static int acm_tty_tiocmset(struct tty_struct *tty,
940 unsigned int set, unsigned int clear)
941{
942 struct acm *acm = tty->driver_data;
943 unsigned int newctrl;
944
945 newctrl = acm->ctrlout;
946 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
947 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
948 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
949 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
950
951 newctrl = (newctrl & ~clear) | set;
952
953 if (acm->ctrlout == newctrl)
954 return 0;
955 return acm_set_control(acm, acm->ctrlout = newctrl);
956}
957
958static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
959{
960 struct serial_struct tmp;
961
962 memset(&tmp, 0, sizeof(tmp));
963 tmp.xmit_fifo_size = acm->writesize;
964 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
965 tmp.close_delay = acm->port.close_delay / 10;
966 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
967 ASYNC_CLOSING_WAIT_NONE :
968 acm->port.closing_wait / 10;
969
970 if (copy_to_user(info, &tmp, sizeof(tmp)))
971 return -EFAULT;
972 else
973 return 0;
974}
975
976static int set_serial_info(struct acm *acm,
977 struct serial_struct __user *newinfo)
978{
979 struct serial_struct new_serial;
980 unsigned int closing_wait, close_delay;
981 int retval = 0;
982
983 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
984 return -EFAULT;
985
986 close_delay = new_serial.close_delay * 10;
987 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
988 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
989
990 mutex_lock(&acm->port.mutex);
991
992 if (!capable(CAP_SYS_ADMIN)) {
993 if ((close_delay != acm->port.close_delay) ||
994 (closing_wait != acm->port.closing_wait))
995 retval = -EPERM;
996 else
997 retval = -EOPNOTSUPP;
998 } else {
999 acm->port.close_delay = close_delay;
1000 acm->port.closing_wait = closing_wait;
1001 }
1002
1003 mutex_unlock(&acm->port.mutex);
1004 return retval;
1005}
1006
1007static int wait_serial_change(struct acm *acm, unsigned long arg)
1008{
1009 int rv = 0;
1010 DECLARE_WAITQUEUE(wait, current);
1011 struct async_icount old, new;
1012
1013 do {
1014 spin_lock_irq(&acm->read_lock);
1015 old = acm->oldcount;
1016 new = acm->iocount;
1017 acm->oldcount = new;
1018 spin_unlock_irq(&acm->read_lock);
1019
1020 if ((arg & TIOCM_DSR) &&
1021 old.dsr != new.dsr)
1022 break;
1023 if ((arg & TIOCM_CD) &&
1024 old.dcd != new.dcd)
1025 break;
1026 if ((arg & TIOCM_RI) &&
1027 old.rng != new.rng)
1028 break;
1029
1030 add_wait_queue(&acm->wioctl, &wait);
1031 set_current_state(TASK_INTERRUPTIBLE);
1032 schedule();
1033 remove_wait_queue(&acm->wioctl, &wait);
1034 if (acm->disconnected) {
1035 if (arg & TIOCM_CD)
1036 break;
1037 else
1038 rv = -ENODEV;
1039 } else {
1040 if (signal_pending(current))
1041 rv = -ERESTARTSYS;
1042 }
1043 } while (!rv);
1044
1045
1046
1047 return rv;
1048}
1049
1050static int acm_tty_get_icount(struct tty_struct *tty,
1051 struct serial_icounter_struct *icount)
1052{
1053 struct acm *acm = tty->driver_data;
1054
1055 icount->dsr = acm->iocount.dsr;
1056 icount->rng = acm->iocount.rng;
1057 icount->dcd = acm->iocount.dcd;
1058 icount->frame = acm->iocount.frame;
1059 icount->overrun = acm->iocount.overrun;
1060 icount->parity = acm->iocount.parity;
1061 icount->brk = acm->iocount.brk;
1062
1063 return 0;
1064}
1065
1066static int acm_tty_ioctl(struct tty_struct *tty,
1067 unsigned int cmd, unsigned long arg)
1068{
1069 struct acm *acm = tty->driver_data;
1070 int rv = -ENOIOCTLCMD;
1071
1072 switch (cmd) {
1073 case TIOCGSERIAL:
1074 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1075 break;
1076 case TIOCSSERIAL:
1077 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1078 break;
1079 case TIOCMIWAIT:
1080 rv = usb_autopm_get_interface(acm->control);
1081 if (rv < 0) {
1082 rv = -EIO;
1083 break;
1084 }
1085 rv = wait_serial_change(acm, arg);
1086 usb_autopm_put_interface(acm->control);
1087 break;
1088 }
1089
1090 return rv;
1091}
1092
1093static void acm_tty_set_termios(struct tty_struct *tty,
1094 struct ktermios *termios_old)
1095{
1096 struct acm *acm = tty->driver_data;
1097 struct ktermios *termios = &tty->termios;
1098 struct usb_cdc_line_coding newline;
1099 int newctrl = acm->ctrlout;
1100
1101 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1102 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1103 newline.bParityType = termios->c_cflag & PARENB ?
1104 (termios->c_cflag & PARODD ? 1 : 2) +
1105 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1106 switch (termios->c_cflag & CSIZE) {
1107 case CS5:
1108 newline.bDataBits = 5;
1109 break;
1110 case CS6:
1111 newline.bDataBits = 6;
1112 break;
1113 case CS7:
1114 newline.bDataBits = 7;
1115 break;
1116 case CS8:
1117 default:
1118 newline.bDataBits = 8;
1119 break;
1120 }
1121
1122 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1123
1124 if (C_BAUD(tty) == B0) {
1125 newline.dwDTERate = acm->line.dwDTERate;
1126 newctrl &= ~ACM_CTRL_DTR;
1127 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1128 newctrl |= ACM_CTRL_DTR;
1129 }
1130
1131 if (newctrl != acm->ctrlout)
1132 acm_set_control(acm, acm->ctrlout = newctrl);
1133
1134 if (memcmp(&acm->line, &newline, sizeof newline)) {
1135 memcpy(&acm->line, &newline, sizeof newline);
1136 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1137 __func__,
1138 le32_to_cpu(newline.dwDTERate),
1139 newline.bCharFormat, newline.bParityType,
1140 newline.bDataBits);
1141 acm_set_line(acm, &acm->line);
1142 }
1143}
1144
1145static const struct tty_port_operations acm_port_ops = {
1146 .dtr_rts = acm_port_dtr_rts,
1147 .shutdown = acm_port_shutdown,
1148 .activate = acm_port_activate,
1149 .destruct = acm_port_destruct,
1150};
1151
1152
1153
1154
1155
1156
1157static void acm_write_buffers_free(struct acm *acm)
1158{
1159 int i;
1160 struct acm_wb *wb;
1161
1162 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1163 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1164}
1165
1166static void acm_read_buffers_free(struct acm *acm)
1167{
1168 int i;
1169
1170 for (i = 0; i < acm->rx_buflimit; i++)
1171 usb_free_coherent(acm->dev, acm->readsize,
1172 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1173}
1174
1175
1176static int acm_write_buffers_alloc(struct acm *acm)
1177{
1178 int i;
1179 struct acm_wb *wb;
1180
1181 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1182 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1183 &wb->dmah);
1184 if (!wb->buf) {
1185 while (i != 0) {
1186 --i;
1187 --wb;
1188 usb_free_coherent(acm->dev, acm->writesize,
1189 wb->buf, wb->dmah);
1190 }
1191 return -ENOMEM;
1192 }
1193 }
1194 return 0;
1195}
1196
1197static int acm_probe(struct usb_interface *intf,
1198 const struct usb_device_id *id)
1199{
1200 struct usb_cdc_union_desc *union_header = NULL;
1201 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1202 unsigned char *buffer = intf->altsetting->extra;
1203 int buflen = intf->altsetting->extralen;
1204 struct usb_interface *control_interface;
1205 struct usb_interface *data_interface;
1206 struct usb_endpoint_descriptor *epctrl = NULL;
1207 struct usb_endpoint_descriptor *epread = NULL;
1208 struct usb_endpoint_descriptor *epwrite = NULL;
1209 struct usb_device *usb_dev = interface_to_usbdev(intf);
1210 struct usb_cdc_parsed_header h;
1211 struct acm *acm;
1212 int minor;
1213 int ctrlsize, readsize;
1214 u8 *buf;
1215 int call_intf_num = -1;
1216 int data_intf_num = -1;
1217 unsigned long quirks;
1218 int num_rx_buf;
1219 int i;
1220 int combined_interfaces = 0;
1221 struct device *tty_dev;
1222 int rv = -ENOMEM;
1223 int res;
1224
1225
1226 quirks = (unsigned long)id->driver_info;
1227
1228 if (quirks == IGNORE_DEVICE)
1229 return -ENODEV;
1230
1231 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1232
1233 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1234
1235
1236 if (quirks == NO_UNION_NORMAL) {
1237 data_interface = usb_ifnum_to_if(usb_dev, 1);
1238 control_interface = usb_ifnum_to_if(usb_dev, 0);
1239
1240 if (!data_interface || !control_interface)
1241 return -ENODEV;
1242 goto skip_normal_probe;
1243 }
1244
1245
1246 if (!buffer) {
1247 dev_err(&intf->dev, "Weird descriptor references\n");
1248 return -EINVAL;
1249 }
1250
1251 if (!intf->cur_altsetting)
1252 return -EINVAL;
1253
1254 if (!buflen) {
1255 if (intf->cur_altsetting->endpoint &&
1256 intf->cur_altsetting->endpoint->extralen &&
1257 intf->cur_altsetting->endpoint->extra) {
1258 dev_dbg(&intf->dev,
1259 "Seeking extra descriptors on endpoint\n");
1260 buflen = intf->cur_altsetting->endpoint->extralen;
1261 buffer = intf->cur_altsetting->endpoint->extra;
1262 } else {
1263 dev_err(&intf->dev,
1264 "Zero length descriptor references\n");
1265 return -EINVAL;
1266 }
1267 }
1268
1269 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1270 union_header = h.usb_cdc_union_desc;
1271 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1272 if (cmgmd)
1273 call_intf_num = cmgmd->bDataInterface;
1274
1275 if (!union_header) {
1276 if (call_intf_num > 0) {
1277 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1278
1279 if (quirks & NO_DATA_INTERFACE) {
1280 data_interface = usb_ifnum_to_if(usb_dev, 0);
1281 } else {
1282 data_intf_num = call_intf_num;
1283 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1284 }
1285 control_interface = intf;
1286 } else {
1287 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1288 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1289 return -ENODEV;
1290 } else {
1291 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1292 combined_interfaces = 1;
1293 control_interface = data_interface = intf;
1294 goto look_for_collapsed_interface;
1295 }
1296 }
1297 } else {
1298 data_intf_num = union_header->bSlaveInterface0;
1299 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1300 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1301 }
1302
1303 if (!control_interface || !data_interface) {
1304 dev_dbg(&intf->dev, "no interfaces\n");
1305 return -ENODEV;
1306 }
1307 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1308 return -ENODEV;
1309
1310 if (data_intf_num != call_intf_num)
1311 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1312
1313 if (control_interface == data_interface) {
1314
1315 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1316 combined_interfaces = 1;
1317
1318 quirks |= NO_CAP_LINE;
1319 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1320 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1321 return -EINVAL;
1322 }
1323look_for_collapsed_interface:
1324 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1325 &epread, &epwrite, &epctrl, NULL);
1326 if (res)
1327 return res;
1328
1329 goto made_compressed_probe;
1330 }
1331
1332skip_normal_probe:
1333
1334
1335 if (data_interface->cur_altsetting->desc.bInterfaceClass
1336 != CDC_DATA_INTERFACE_TYPE) {
1337 if (control_interface->cur_altsetting->desc.bInterfaceClass
1338 == CDC_DATA_INTERFACE_TYPE) {
1339 dev_dbg(&intf->dev,
1340 "Your device has switched interfaces.\n");
1341 swap(control_interface, data_interface);
1342 } else {
1343 return -EINVAL;
1344 }
1345 }
1346
1347
1348 if (!combined_interfaces && intf != control_interface)
1349 return -ENODEV;
1350
1351 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1352
1353 dev_dbg(&intf->dev, "The data interface isn't available\n");
1354 return -EBUSY;
1355 }
1356
1357
1358 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1359 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1360 return -EINVAL;
1361
1362 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1363 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1364 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1365
1366
1367
1368 if (!usb_endpoint_dir_in(epread)) {
1369
1370 dev_dbg(&intf->dev,
1371 "The data interface has switched endpoints\n");
1372 swap(epread, epwrite);
1373 }
1374made_compressed_probe:
1375 dev_dbg(&intf->dev, "interfaces are valid\n");
1376
1377 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1378 if (acm == NULL)
1379 goto alloc_fail;
1380
1381 minor = acm_alloc_minor(acm);
1382 if (minor < 0)
1383 goto alloc_fail1;
1384
1385 ctrlsize = usb_endpoint_maxp(epctrl);
1386 readsize = usb_endpoint_maxp(epread) *
1387 (quirks == SINGLE_RX_URB ? 1 : 2);
1388 acm->combined_interfaces = combined_interfaces;
1389 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1390 acm->control = control_interface;
1391 acm->data = data_interface;
1392 acm->minor = minor;
1393 acm->dev = usb_dev;
1394 if (h.usb_cdc_acm_descriptor)
1395 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1396 if (quirks & NO_CAP_LINE)
1397 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1398 acm->ctrlsize = ctrlsize;
1399 acm->readsize = readsize;
1400 acm->rx_buflimit = num_rx_buf;
1401 INIT_WORK(&acm->work, acm_softint);
1402 init_waitqueue_head(&acm->wioctl);
1403 spin_lock_init(&acm->write_lock);
1404 spin_lock_init(&acm->read_lock);
1405 mutex_init(&acm->mutex);
1406 if (usb_endpoint_xfer_int(epread)) {
1407 acm->bInterval = epread->bInterval;
1408 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1409 } else {
1410 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1411 }
1412 if (usb_endpoint_xfer_int(epwrite))
1413 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1414 else
1415 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1416 tty_port_init(&acm->port);
1417 acm->port.ops = &acm_port_ops;
1418 init_usb_anchor(&acm->delayed);
1419 acm->quirks = quirks;
1420
1421 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1422 if (!buf)
1423 goto alloc_fail2;
1424 acm->ctrl_buffer = buf;
1425
1426 if (acm_write_buffers_alloc(acm) < 0)
1427 goto alloc_fail4;
1428
1429 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1430 if (!acm->ctrlurb)
1431 goto alloc_fail5;
1432
1433 for (i = 0; i < num_rx_buf; i++) {
1434 struct acm_rb *rb = &(acm->read_buffers[i]);
1435 struct urb *urb;
1436
1437 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1438 &rb->dma);
1439 if (!rb->base)
1440 goto alloc_fail6;
1441 rb->index = i;
1442 rb->instance = acm;
1443
1444 urb = usb_alloc_urb(0, GFP_KERNEL);
1445 if (!urb)
1446 goto alloc_fail6;
1447
1448 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1449 urb->transfer_dma = rb->dma;
1450 if (usb_endpoint_xfer_int(epread))
1451 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1452 acm->readsize,
1453 acm_read_bulk_callback, rb,
1454 acm->bInterval);
1455 else
1456 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1457 acm->readsize,
1458 acm_read_bulk_callback, rb);
1459
1460 acm->read_urbs[i] = urb;
1461 __set_bit(i, &acm->read_urbs_free);
1462 }
1463 for (i = 0; i < ACM_NW; i++) {
1464 struct acm_wb *snd = &(acm->wb[i]);
1465
1466 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1467 if (snd->urb == NULL)
1468 goto alloc_fail7;
1469
1470 if (usb_endpoint_xfer_int(epwrite))
1471 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1472 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1473 else
1474 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1475 NULL, acm->writesize, acm_write_bulk, snd);
1476 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1477 if (quirks & SEND_ZERO_PACKET)
1478 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1479 snd->instance = acm;
1480 }
1481
1482 usb_set_intfdata(intf, acm);
1483
1484 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1485 if (i < 0)
1486 goto alloc_fail7;
1487
1488 if (h.usb_cdc_country_functional_desc) {
1489 struct usb_cdc_country_functional_desc * cfd =
1490 h.usb_cdc_country_functional_desc;
1491
1492 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1493 if (!acm->country_codes)
1494 goto skip_countries;
1495 acm->country_code_size = cfd->bLength - 4;
1496 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1497 cfd->bLength - 4);
1498 acm->country_rel_date = cfd->iCountryCodeRelDate;
1499
1500 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1501 if (i < 0) {
1502 kfree(acm->country_codes);
1503 acm->country_codes = NULL;
1504 acm->country_code_size = 0;
1505 goto skip_countries;
1506 }
1507
1508 i = device_create_file(&intf->dev,
1509 &dev_attr_iCountryCodeRelDate);
1510 if (i < 0) {
1511 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1512 kfree(acm->country_codes);
1513 acm->country_codes = NULL;
1514 acm->country_code_size = 0;
1515 goto skip_countries;
1516 }
1517 }
1518
1519skip_countries:
1520 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1521 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1522 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1523
1524 epctrl->bInterval ? epctrl->bInterval : 16);
1525 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1526 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1527 acm->notification_buffer = NULL;
1528 acm->nb_index = 0;
1529 acm->nb_size = 0;
1530
1531 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1532
1533 acm->line.dwDTERate = cpu_to_le32(9600);
1534 acm->line.bDataBits = 8;
1535 acm_set_line(acm, &acm->line);
1536
1537 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1538 usb_set_intfdata(data_interface, acm);
1539
1540 usb_get_intf(control_interface);
1541 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1542 &control_interface->dev);
1543 if (IS_ERR(tty_dev)) {
1544 rv = PTR_ERR(tty_dev);
1545 goto alloc_fail8;
1546 }
1547
1548 if (quirks & CLEAR_HALT_CONDITIONS) {
1549 usb_clear_halt(usb_dev, acm->in);
1550 usb_clear_halt(usb_dev, acm->out);
1551 }
1552
1553 return 0;
1554alloc_fail8:
1555 if (acm->country_codes) {
1556 device_remove_file(&acm->control->dev,
1557 &dev_attr_wCountryCodes);
1558 device_remove_file(&acm->control->dev,
1559 &dev_attr_iCountryCodeRelDate);
1560 kfree(acm->country_codes);
1561 }
1562 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1563alloc_fail7:
1564 usb_set_intfdata(intf, NULL);
1565 for (i = 0; i < ACM_NW; i++)
1566 usb_free_urb(acm->wb[i].urb);
1567alloc_fail6:
1568 for (i = 0; i < num_rx_buf; i++)
1569 usb_free_urb(acm->read_urbs[i]);
1570 acm_read_buffers_free(acm);
1571 usb_free_urb(acm->ctrlurb);
1572alloc_fail5:
1573 acm_write_buffers_free(acm);
1574alloc_fail4:
1575 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1576alloc_fail2:
1577 acm_release_minor(acm);
1578alloc_fail1:
1579 kfree(acm);
1580alloc_fail:
1581 return rv;
1582}
1583
1584static void acm_disconnect(struct usb_interface *intf)
1585{
1586 struct acm *acm = usb_get_intfdata(intf);
1587 struct tty_struct *tty;
1588
1589
1590 if (!acm)
1591 return;
1592
1593 mutex_lock(&acm->mutex);
1594 acm->disconnected = true;
1595 if (acm->country_codes) {
1596 device_remove_file(&acm->control->dev,
1597 &dev_attr_wCountryCodes);
1598 device_remove_file(&acm->control->dev,
1599 &dev_attr_iCountryCodeRelDate);
1600 }
1601 wake_up_all(&acm->wioctl);
1602 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1603 usb_set_intfdata(acm->control, NULL);
1604 usb_set_intfdata(acm->data, NULL);
1605 mutex_unlock(&acm->mutex);
1606
1607 tty = tty_port_tty_get(&acm->port);
1608 if (tty) {
1609 tty_vhangup(tty);
1610 tty_kref_put(tty);
1611 }
1612
1613 acm_kill_urbs(acm);
1614 cancel_work_sync(&acm->work);
1615
1616 tty_unregister_device(acm_tty_driver, acm->minor);
1617
1618 acm_write_buffers_free(acm);
1619 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1620 acm_read_buffers_free(acm);
1621
1622 kfree(acm->notification_buffer);
1623
1624 if (!acm->combined_interfaces)
1625 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1626 acm->data : acm->control);
1627
1628 tty_port_put(&acm->port);
1629}
1630
1631#ifdef CONFIG_PM
1632static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1633{
1634 struct acm *acm = usb_get_intfdata(intf);
1635 int cnt;
1636
1637 spin_lock_irq(&acm->write_lock);
1638 if (PMSG_IS_AUTO(message)) {
1639 if (acm->transmitting) {
1640 spin_unlock_irq(&acm->write_lock);
1641 return -EBUSY;
1642 }
1643 }
1644 cnt = acm->susp_count++;
1645 spin_unlock_irq(&acm->write_lock);
1646
1647 if (cnt)
1648 return 0;
1649
1650 acm_kill_urbs(acm);
1651 cancel_work_sync(&acm->work);
1652
1653 return 0;
1654}
1655
1656static int acm_resume(struct usb_interface *intf)
1657{
1658 struct acm *acm = usb_get_intfdata(intf);
1659 struct urb *urb;
1660 int rv = 0;
1661
1662 spin_lock_irq(&acm->write_lock);
1663
1664 if (--acm->susp_count)
1665 goto out;
1666
1667 if (tty_port_initialized(&acm->port)) {
1668 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1669
1670 for (;;) {
1671 urb = usb_get_from_anchor(&acm->delayed);
1672 if (!urb)
1673 break;
1674
1675 acm_start_wb(acm, urb->context);
1676 }
1677
1678
1679
1680
1681
1682 if (rv < 0)
1683 goto out;
1684
1685 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1686 }
1687out:
1688 spin_unlock_irq(&acm->write_lock);
1689
1690 return rv;
1691}
1692
1693static int acm_reset_resume(struct usb_interface *intf)
1694{
1695 struct acm *acm = usb_get_intfdata(intf);
1696
1697 if (tty_port_initialized(&acm->port))
1698 tty_port_tty_hangup(&acm->port, false);
1699
1700 return acm_resume(intf);
1701}
1702
1703#endif
1704
1705static int acm_pre_reset(struct usb_interface *intf)
1706{
1707 struct acm *acm = usb_get_intfdata(intf);
1708
1709 clear_bit(EVENT_RX_STALL, &acm->flags);
1710
1711 return 0;
1712}
1713
1714#define NOKIA_PCSUITE_ACM_INFO(x) \
1715 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1716 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1717 USB_CDC_ACM_PROTO_VENDOR)
1718
1719#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1720 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1721 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1722 USB_CDC_ACM_PROTO_VENDOR)
1723
1724
1725
1726
1727
1728static const struct usb_device_id acm_ids[] = {
1729
1730 { USB_DEVICE(0x076d, 0x0006),
1731 .driver_info = NO_UNION_NORMAL, },
1732 { USB_DEVICE(0x17ef, 0x7000),
1733 .driver_info = NO_UNION_NORMAL, },
1734 { USB_DEVICE(0x0870, 0x0001),
1735 .driver_info = NO_UNION_NORMAL,
1736 },
1737 { USB_DEVICE(0x0e8d, 0x0003),
1738 .driver_info = NO_UNION_NORMAL,
1739 },
1740 { USB_DEVICE(0x0e8d, 0x3329),
1741 .driver_info = NO_UNION_NORMAL,
1742 },
1743 { USB_DEVICE(0x0482, 0x0203),
1744 .driver_info = NO_UNION_NORMAL,
1745 },
1746 { USB_DEVICE(0x079b, 0x000f),
1747 .driver_info = NO_UNION_NORMAL,
1748 },
1749 { USB_DEVICE(0x0ace, 0x1602),
1750 .driver_info = SINGLE_RX_URB,
1751 },
1752 { USB_DEVICE(0x0ace, 0x1608),
1753 .driver_info = SINGLE_RX_URB,
1754 },
1755 { USB_DEVICE(0x0ace, 0x1611),
1756 .driver_info = SINGLE_RX_URB,
1757 },
1758 { USB_DEVICE(0x11ca, 0x0201),
1759 .driver_info = SINGLE_RX_URB,
1760 },
1761 { USB_DEVICE(0x22b8, 0x7000),
1762 .driver_info = NO_UNION_NORMAL,
1763 },
1764 { USB_DEVICE(0x0803, 0x3095),
1765 .driver_info = NO_UNION_NORMAL,
1766 },
1767 { USB_DEVICE(0x0572, 0x1321),
1768 .driver_info = NO_UNION_NORMAL,
1769 },
1770 { USB_DEVICE(0x0572, 0x1324),
1771 .driver_info = NO_UNION_NORMAL,
1772 },
1773 { USB_DEVICE(0x0572, 0x1328),
1774 .driver_info = NO_UNION_NORMAL,
1775 },
1776 { USB_DEVICE(0x20df, 0x0001),
1777 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1778 { USB_DEVICE(0x2184, 0x001c) },
1779 { USB_DEVICE(0x2184, 0x0036) },
1780 { USB_DEVICE(0x22b8, 0x6425),
1781 },
1782
1783 { USB_DEVICE(0x22b8, 0x2d91) },
1784 { USB_DEVICE(0x22b8, 0x2d92),
1785 .driver_info = NO_UNION_NORMAL,
1786 },
1787 { USB_DEVICE(0x22b8, 0x2d93),
1788 .driver_info = NO_UNION_NORMAL,
1789 },
1790 { USB_DEVICE(0x22b8, 0x2d95),
1791 .driver_info = NO_UNION_NORMAL,
1792 },
1793 { USB_DEVICE(0x22b8, 0x2d96),
1794 .driver_info = NO_UNION_NORMAL,
1795 },
1796 { USB_DEVICE(0x22b8, 0x2d97),
1797 .driver_info = NO_UNION_NORMAL,
1798 },
1799 { USB_DEVICE(0x22b8, 0x2d99),
1800 .driver_info = NO_UNION_NORMAL,
1801 },
1802 { USB_DEVICE(0x22b8, 0x2d9a),
1803 .driver_info = NO_UNION_NORMAL,
1804 },
1805
1806 { USB_DEVICE(0x0572, 0x1329),
1807 .driver_info = NO_UNION_NORMAL,
1808
1809
1810
1811
1812 },
1813 { USB_DEVICE(0x0572, 0x1340),
1814 .driver_info = NO_UNION_NORMAL,
1815 },
1816 { USB_DEVICE(0x05f9, 0x4002),
1817 .driver_info = NO_UNION_NORMAL,
1818 },
1819 { USB_DEVICE(0x1bbb, 0x0003),
1820 .driver_info = NO_UNION_NORMAL,
1821 },
1822 { USB_DEVICE(0x1576, 0x03b1),
1823 .driver_info = NO_UNION_NORMAL,
1824 },
1825 { USB_DEVICE(0xfff0, 0x0100),
1826 .driver_info = NO_UNION_NORMAL,
1827 },
1828 { USB_DEVICE(0x09d8, 0x0320),
1829 .driver_info = NO_UNION_NORMAL,
1830 },
1831
1832 { USB_DEVICE(0x2912, 0x0001),
1833 .driver_info = CLEAR_HALT_CONDITIONS,
1834 },
1835
1836
1837
1838
1839
1840
1841 { NOKIA_PCSUITE_ACM_INFO(0x042D), },
1842 { NOKIA_PCSUITE_ACM_INFO(0x04D8), },
1843 { NOKIA_PCSUITE_ACM_INFO(0x04C9), },
1844 { NOKIA_PCSUITE_ACM_INFO(0x0419), },
1845 { NOKIA_PCSUITE_ACM_INFO(0x044D), },
1846 { NOKIA_PCSUITE_ACM_INFO(0x0001), },
1847 { NOKIA_PCSUITE_ACM_INFO(0x0475), },
1848 { NOKIA_PCSUITE_ACM_INFO(0x0508), },
1849 { NOKIA_PCSUITE_ACM_INFO(0x0418), },
1850 { NOKIA_PCSUITE_ACM_INFO(0x0425), },
1851 { NOKIA_PCSUITE_ACM_INFO(0x0486), },
1852 { NOKIA_PCSUITE_ACM_INFO(0x04DF), },
1853 { NOKIA_PCSUITE_ACM_INFO(0x000e), },
1854 { NOKIA_PCSUITE_ACM_INFO(0x0445), },
1855 { NOKIA_PCSUITE_ACM_INFO(0x042F), },
1856 { NOKIA_PCSUITE_ACM_INFO(0x048E), },
1857 { NOKIA_PCSUITE_ACM_INFO(0x0420), },
1858 { NOKIA_PCSUITE_ACM_INFO(0x04E6), },
1859 { NOKIA_PCSUITE_ACM_INFO(0x04B2), },
1860 { NOKIA_PCSUITE_ACM_INFO(0x0134), },
1861 { NOKIA_PCSUITE_ACM_INFO(0x046E), },
1862 { NOKIA_PCSUITE_ACM_INFO(0x002f), },
1863 { NOKIA_PCSUITE_ACM_INFO(0x0088), },
1864 { NOKIA_PCSUITE_ACM_INFO(0x00fc), },
1865 { NOKIA_PCSUITE_ACM_INFO(0x0042), },
1866 { NOKIA_PCSUITE_ACM_INFO(0x00b0), },
1867 { NOKIA_PCSUITE_ACM_INFO(0x00ab), },
1868 { NOKIA_PCSUITE_ACM_INFO(0x0481), },
1869 { NOKIA_PCSUITE_ACM_INFO(0x0007), },
1870 { NOKIA_PCSUITE_ACM_INFO(0x0071), },
1871 { NOKIA_PCSUITE_ACM_INFO(0x04F0), },
1872 { NOKIA_PCSUITE_ACM_INFO(0x0070), },
1873 { NOKIA_PCSUITE_ACM_INFO(0x00e9), },
1874 { NOKIA_PCSUITE_ACM_INFO(0x0099), },
1875 { NOKIA_PCSUITE_ACM_INFO(0x0128), },
1876 { NOKIA_PCSUITE_ACM_INFO(0x008f), },
1877 { NOKIA_PCSUITE_ACM_INFO(0x00a0), },
1878 { NOKIA_PCSUITE_ACM_INFO(0x007b), },
1879 { NOKIA_PCSUITE_ACM_INFO(0x0094), },
1880 { NOKIA_PCSUITE_ACM_INFO(0x003a), },
1881 { NOKIA_PCSUITE_ACM_INFO(0x00e9), },
1882 { NOKIA_PCSUITE_ACM_INFO(0x0108), },
1883 { NOKIA_PCSUITE_ACM_INFO(0x01f5), },
1884 { NOKIA_PCSUITE_ACM_INFO(0x02e3), },
1885 { NOKIA_PCSUITE_ACM_INFO(0x0178), },
1886 { NOKIA_PCSUITE_ACM_INFO(0x010e), },
1887 { NOKIA_PCSUITE_ACM_INFO(0x02d9), },
1888 { NOKIA_PCSUITE_ACM_INFO(0x01d0), },
1889 { NOKIA_PCSUITE_ACM_INFO(0x0223), },
1890 { NOKIA_PCSUITE_ACM_INFO(0x0275), },
1891 { NOKIA_PCSUITE_ACM_INFO(0x026c), },
1892 { NOKIA_PCSUITE_ACM_INFO(0x0154), },
1893 { NOKIA_PCSUITE_ACM_INFO(0x04ce), },
1894 { NOKIA_PCSUITE_ACM_INFO(0x01d4), },
1895 { NOKIA_PCSUITE_ACM_INFO(0x0302), },
1896 { NOKIA_PCSUITE_ACM_INFO(0x0335), },
1897 { NOKIA_PCSUITE_ACM_INFO(0x03cd), },
1898 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), },
1899
1900
1901 { USB_DEVICE(0x03eb, 0x0030), },
1902
1903
1904
1905
1906 { USB_DEVICE(0x04d8, 0x000b),
1907 .driver_info = NO_DATA_INTERFACE,
1908 },
1909
1910#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1911 { USB_DEVICE(0x04d8, 0x0082),
1912 .driver_info = IGNORE_DEVICE,
1913 },
1914 { USB_DEVICE(0x04d8, 0x0083),
1915 .driver_info = IGNORE_DEVICE,
1916 },
1917#endif
1918
1919
1920 { USB_DEVICE(0x04e8, 0x685d),
1921 .driver_info = IGNORE_DEVICE,
1922 },
1923
1924
1925 { USB_DEVICE(0x058b, 0x0041),
1926 .driver_info = IGNORE_DEVICE,
1927 },
1928
1929
1930 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1931 USB_CDC_PROTO_NONE) },
1932
1933
1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1935 USB_CDC_ACM_PROTO_AT_V25TER) },
1936 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1937 USB_CDC_ACM_PROTO_AT_PCCA101) },
1938 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1939 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1940 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1941 USB_CDC_ACM_PROTO_AT_GSM) },
1942 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1943 USB_CDC_ACM_PROTO_AT_3G) },
1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1945 USB_CDC_ACM_PROTO_AT_CDMA) },
1946
1947 { USB_DEVICE(0x1519, 0x0452),
1948 .driver_info = SEND_ZERO_PACKET,
1949 },
1950
1951 { }
1952};
1953
1954MODULE_DEVICE_TABLE(usb, acm_ids);
1955
1956static struct usb_driver acm_driver = {
1957 .name = "cdc_acm",
1958 .probe = acm_probe,
1959 .disconnect = acm_disconnect,
1960#ifdef CONFIG_PM
1961 .suspend = acm_suspend,
1962 .resume = acm_resume,
1963 .reset_resume = acm_reset_resume,
1964#endif
1965 .pre_reset = acm_pre_reset,
1966 .id_table = acm_ids,
1967#ifdef CONFIG_PM
1968 .supports_autosuspend = 1,
1969#endif
1970 .disable_hub_initiated_lpm = 1,
1971};
1972
1973
1974
1975
1976
1977static const struct tty_operations acm_ops = {
1978 .install = acm_tty_install,
1979 .open = acm_tty_open,
1980 .close = acm_tty_close,
1981 .cleanup = acm_tty_cleanup,
1982 .hangup = acm_tty_hangup,
1983 .write = acm_tty_write,
1984 .put_char = acm_tty_put_char,
1985 .flush_chars = acm_tty_flush_chars,
1986 .write_room = acm_tty_write_room,
1987 .ioctl = acm_tty_ioctl,
1988 .throttle = acm_tty_throttle,
1989 .unthrottle = acm_tty_unthrottle,
1990 .chars_in_buffer = acm_tty_chars_in_buffer,
1991 .break_ctl = acm_tty_break_ctl,
1992 .set_termios = acm_tty_set_termios,
1993 .tiocmget = acm_tty_tiocmget,
1994 .tiocmset = acm_tty_tiocmset,
1995 .get_icount = acm_tty_get_icount,
1996};
1997
1998
1999
2000
2001
2002static int __init acm_init(void)
2003{
2004 int retval;
2005 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2006 if (!acm_tty_driver)
2007 return -ENOMEM;
2008 acm_tty_driver->driver_name = "acm",
2009 acm_tty_driver->name = "ttyACM",
2010 acm_tty_driver->major = ACM_TTY_MAJOR,
2011 acm_tty_driver->minor_start = 0,
2012 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2013 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2014 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2015 acm_tty_driver->init_termios = tty_std_termios;
2016 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2017 HUPCL | CLOCAL;
2018 tty_set_operations(acm_tty_driver, &acm_ops);
2019
2020 retval = tty_register_driver(acm_tty_driver);
2021 if (retval) {
2022 put_tty_driver(acm_tty_driver);
2023 return retval;
2024 }
2025
2026 retval = usb_register(&acm_driver);
2027 if (retval) {
2028 tty_unregister_driver(acm_tty_driver);
2029 put_tty_driver(acm_tty_driver);
2030 return retval;
2031 }
2032
2033 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2034
2035 return 0;
2036}
2037
2038static void __exit acm_exit(void)
2039{
2040 usb_deregister(&acm_driver);
2041 tty_unregister_driver(acm_tty_driver);
2042 put_tty_driver(acm_tty_driver);
2043 idr_destroy(&acm_minors);
2044}
2045
2046module_init(acm_init);
2047module_exit(acm_exit);
2048
2049MODULE_AUTHOR(DRIVER_AUTHOR);
2050MODULE_DESCRIPTION(DRIVER_DESC);
2051MODULE_LICENSE("GPL");
2052MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
2053
