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net: DCB: Validate DCB_ATTR_DCB_BUFFER argument
[linux/fpc-iii.git] / drivers / usb / class / cdc-acm.c
blob7499ba118665a2f236a20d7c7cf88c61b2c08b2e
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * cdc-acm.c
4 *
5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
10 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
12 *
13 * USB Abstract Control Model driver for USB modems and ISDN adapters
14 *
15 * Sponsored by SuSE
16 */
17
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
47 static struct usb_driver acm_driver;
48 static struct tty_driver *acm_tty_driver;
49
50 static DEFINE_IDR(acm_minors);
51 static DEFINE_MUTEX(acm_minors_lock);
52
53 static void acm_tty_set_termios(struct tty_struct *tty,
54 struct ktermios *termios_old);
55
56 /*
57 * acm_minors accessors
58 */
59
60 /*
61 * Look up an ACM structure by minor. If found and not disconnected, increment
62 * its refcount and return it with its mutex held.
63 */
64 static 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 * Try to find an available minor number and if found, associate it with 'acm'.
86 */
87 static 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 /* Release the minor number associated with 'acm'. */
99 static 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 * Functions for ACM control messages.
108 */
109
110 static 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 /* devices aren't required to support these requests.
134 * the cdc acm descriptor tells whether they do...
135 */
136 static 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
150 static 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 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
166 static int acm_wb_alloc(struct acm *acm)
167 {
168 int i, wbn;
169 struct acm_wb *wb;
170
171 wbn = 0;
172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 wb->len = 0;
178 return wbn;
179 }
180 wbn = (wbn + 1) % ACM_NW;
181 if (++i >= ACM_NW)
182 return -1;
183 }
184 }
185
186 static 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 * Finish write. Caller must hold acm->write_lock
201 */
202 static 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 * Poke write.
211 *
212 * the caller is responsible for locking
213 */
214
215 static 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 * attributes exported through sysfs
238 */
239 static 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 }
247 static DEVICE_ATTR_RO(bmCapabilities);
248
249 static 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
259 static DEVICE_ATTR_RO(wCountryCodes);
260
261 static 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
270 static DEVICE_ATTR_RO(iCountryCodeRelDate);
271 /*
272 * Interrupt handlers for various ACM device responses
273 */
274
275 static 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 /* control interface reports status changes with "interrupt" transfers */
341 static 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 /* success */
353 break;
354 case -ECONNRESET:
355 case -ENOENT:
356 case -ESHUTDOWN:
357 /* this urb is terminated, clean up */
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 /* size = notification-header + (optional) data */
375 expected_size = sizeof(struct usb_cdc_notification) +
376 le16_to_cpu(dr->wLength);
377
378 if (current_size < expected_size) {
379 /* notification is transmitted fragmented, reassemble */
380 if (acm->nb_size < expected_size) {
381 u8 *new_buffer;
382 alloc_size = roundup_pow_of_two(expected_size);
383 /* Final freeing is done on disconnect. */
384 new_buffer = krealloc(acm->notification_buffer,
385 alloc_size, GFP_ATOMIC);
386 if (!new_buffer) {
387 acm->nb_index = 0;
388 goto exit;
389 }
390
391 acm->notification_buffer = new_buffer;
392 acm->nb_size = alloc_size;
393 dr = (struct usb_cdc_notification *)acm->notification_buffer;
394 }
395
396 copy_size = min(current_size,
397 expected_size - acm->nb_index);
398
399 memcpy(&acm->notification_buffer[acm->nb_index],
400 urb->transfer_buffer, copy_size);
401 acm->nb_index += copy_size;
402 current_size = acm->nb_index;
403 }
404
405 if (current_size >= expected_size) {
406 /* notification complete */
407 acm_process_notification(acm, (unsigned char *)dr);
408 acm->nb_index = 0;
409 }
410
411 exit:
412 retval = usb_submit_urb(urb, GFP_ATOMIC);
413 if (retval && retval != -EPERM && retval != -ENODEV)
414 dev_err(&acm->control->dev,
415 "%s - usb_submit_urb failed: %d\n", __func__, retval);
416 else
417 dev_vdbg(&acm->control->dev,
418 "control resubmission terminated %d\n", retval);
419 }
420
421 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
422 {
423 int res;
424
425 if (!test_and_clear_bit(index, &acm->read_urbs_free))
426 return 0;
427
428 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
429 if (res) {
430 if (res != -EPERM && res != -ENODEV) {
431 dev_err(&acm->data->dev,
432 "urb %d failed submission with %d\n",
433 index, res);
434 } else {
435 dev_vdbg(&acm->data->dev, "intended failure %d\n", res);
436 }
437 set_bit(index, &acm->read_urbs_free);
438 return res;
439 } else {
440 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
441 }
442
443 return 0;
444 }
445
446 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
447 {
448 int res;
449 int i;
450
451 for (i = 0; i < acm->rx_buflimit; ++i) {
452 res = acm_submit_read_urb(acm, i, mem_flags);
453 if (res)
454 return res;
455 }
456
457 return 0;
458 }
459
460 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
461 {
462 if (!urb->actual_length)
463 return;
464
465 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
466 urb->actual_length);
467 tty_flip_buffer_push(&acm->port);
468 }
469
470 static void acm_read_bulk_callback(struct urb *urb)
471 {
472 struct acm_rb *rb = urb->context;
473 struct acm *acm = rb->instance;
474 int status = urb->status;
475 bool stopped = false;
476 bool stalled = false;
477 bool cooldown = false;
478
479 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
480 rb->index, urb->actual_length, status);
481
482 if (!acm->dev) {
483 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
484 return;
485 }
486
487 switch (status) {
488 case 0:
489 usb_mark_last_busy(acm->dev);
490 acm_process_read_urb(acm, urb);
491 break;
492 case -EPIPE:
493 set_bit(EVENT_RX_STALL, &acm->flags);
494 stalled = true;
495 break;
496 case -ENOENT:
497 case -ECONNRESET:
498 case -ESHUTDOWN:
499 dev_dbg(&acm->data->dev,
500 "%s - urb shutting down with status: %d\n",
501 __func__, status);
502 stopped = true;
503 break;
504 case -EOVERFLOW:
505 case -EPROTO:
506 dev_dbg(&acm->data->dev,
507 "%s - cooling babbling device\n", __func__);
508 usb_mark_last_busy(acm->dev);
509 set_bit(rb->index, &acm->urbs_in_error_delay);
510 cooldown = true;
511 break;
512 default:
513 dev_dbg(&acm->data->dev,
514 "%s - nonzero urb status received: %d\n",
515 __func__, status);
516 break;
517 }
518
519 /*
520 * Make sure URB processing is done before marking as free to avoid
521 * racing with unthrottle() on another CPU. Matches the barriers
522 * implied by the test_and_clear_bit() in acm_submit_read_urb().
523 */
524 smp_mb__before_atomic();
525 set_bit(rb->index, &acm->read_urbs_free);
526 /*
527 * Make sure URB is marked as free before checking the throttled flag
528 * to avoid racing with unthrottle() on another CPU. Matches the
529 * smp_mb() in unthrottle().
530 */
531 smp_mb__after_atomic();
532
533 if (stopped || stalled || cooldown) {
534 if (stalled)
535 schedule_work(&acm->work);
536 else if (cooldown)
537 schedule_delayed_work(&acm->dwork, HZ / 2);
538 return;
539 }
540
541 if (test_bit(ACM_THROTTLED, &acm->flags))
542 return;
543
544 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
545 }
546
547 /* data interface wrote those outgoing bytes */
548 static void acm_write_bulk(struct urb *urb)
549 {
550 struct acm_wb *wb = urb->context;
551 struct acm *acm = wb->instance;
552 unsigned long flags;
553 int status = urb->status;
554
555 if (status || (urb->actual_length != urb->transfer_buffer_length))
556 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
557 urb->actual_length,
558 urb->transfer_buffer_length,
559 status);
560
561 spin_lock_irqsave(&acm->write_lock, flags);
562 acm_write_done(acm, wb);
563 spin_unlock_irqrestore(&acm->write_lock, flags);
564 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
565 schedule_work(&acm->work);
566 }
567
568 static void acm_softint(struct work_struct *work)
569 {
570 int i;
571 struct acm *acm = container_of(work, struct acm, work);
572
573 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
574 smp_mb(); /* against acm_suspend() */
575 if (!acm->susp_count) {
576 for (i = 0; i < acm->rx_buflimit; i++)
577 usb_kill_urb(acm->read_urbs[i]);
578 usb_clear_halt(acm->dev, acm->in);
579 acm_submit_read_urbs(acm, GFP_KERNEL);
580 clear_bit(EVENT_RX_STALL, &acm->flags);
581 }
582 }
583
584 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {
585 for (i = 0; i < acm->rx_buflimit; i++)
586 if (test_and_clear_bit(i, &acm->urbs_in_error_delay))
587 acm_submit_read_urb(acm, i, GFP_NOIO);
588 }
589
590 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
591 tty_port_tty_wakeup(&acm->port);
592 }
593
594 /*
595 * TTY handlers
596 */
597
598 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
599 {
600 struct acm *acm;
601 int retval;
602
603 acm = acm_get_by_minor(tty->index);
604 if (!acm)
605 return -ENODEV;
606
607 retval = tty_standard_install(driver, tty);
608 if (retval)
609 goto error_init_termios;
610
611 /*
612 * Suppress initial echoing for some devices which might send data
613 * immediately after acm driver has been installed.
614 */
615 if (acm->quirks & DISABLE_ECHO)
616 tty->termios.c_lflag &= ~ECHO;
617
618 tty->driver_data = acm;
619
620 return 0;
621
622 error_init_termios:
623 tty_port_put(&acm->port);
624 return retval;
625 }
626
627 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
628 {
629 struct acm *acm = tty->driver_data;
630
631 return tty_port_open(&acm->port, tty, filp);
632 }
633
634 static void acm_port_dtr_rts(struct tty_port *port, int raise)
635 {
636 struct acm *acm = container_of(port, struct acm, port);
637 int val;
638 int res;
639
640 if (raise)
641 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
642 else
643 val = 0;
644
645 /* FIXME: add missing ctrlout locking throughout driver */
646 acm->ctrlout = val;
647
648 res = acm_set_control(acm, val);
649 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
650 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
651 }
652
653 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
654 {
655 struct acm *acm = container_of(port, struct acm, port);
656 int retval = -ENODEV;
657 int i;
658
659 mutex_lock(&acm->mutex);
660 if (acm->disconnected)
661 goto disconnected;
662
663 retval = usb_autopm_get_interface(acm->control);
664 if (retval)
665 goto error_get_interface;
666
667 /*
668 * FIXME: Why do we need this? Allocating 64K of physically contiguous
669 * memory is really nasty...
670 */
671 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
672 acm->control->needs_remote_wakeup = 1;
673
674 acm->ctrlurb->dev = acm->dev;
675 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
676 if (retval) {
677 dev_err(&acm->control->dev,
678 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
679 goto error_submit_urb;
680 }
681
682 acm_tty_set_termios(tty, NULL);
683
684 /*
685 * Unthrottle device in case the TTY was closed while throttled.
686 */
687 clear_bit(ACM_THROTTLED, &acm->flags);
688
689 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
690 if (retval)
691 goto error_submit_read_urbs;
692
693 usb_autopm_put_interface(acm->control);
694
695 mutex_unlock(&acm->mutex);
696
697 return 0;
698
699 error_submit_read_urbs:
700 for (i = 0; i < acm->rx_buflimit; i++)
701 usb_kill_urb(acm->read_urbs[i]);
702 usb_kill_urb(acm->ctrlurb);
703 error_submit_urb:
704 usb_autopm_put_interface(acm->control);
705 error_get_interface:
706 disconnected:
707 mutex_unlock(&acm->mutex);
708
709 return usb_translate_errors(retval);
710 }
711
712 static void acm_port_destruct(struct tty_port *port)
713 {
714 struct acm *acm = container_of(port, struct acm, port);
715
716 acm_release_minor(acm);
717 usb_put_intf(acm->control);
718 kfree(acm->country_codes);
719 kfree(acm);
720 }
721
722 static void acm_port_shutdown(struct tty_port *port)
723 {
724 struct acm *acm = container_of(port, struct acm, port);
725 struct urb *urb;
726 struct acm_wb *wb;
727
728 /*
729 * Need to grab write_lock to prevent race with resume, but no need to
730 * hold it due to the tty-port initialised flag.
731 */
732 spin_lock_irq(&acm->write_lock);
733 spin_unlock_irq(&acm->write_lock);
734
735 usb_autopm_get_interface_no_resume(acm->control);
736 acm->control->needs_remote_wakeup = 0;
737 usb_autopm_put_interface(acm->control);
738
739 for (;;) {
740 urb = usb_get_from_anchor(&acm->delayed);
741 if (!urb)
742 break;
743 wb = urb->context;
744 wb->use = 0;
745 usb_autopm_put_interface_async(acm->control);
746 }
747
748 acm_kill_urbs(acm);
749 }
750
751 static void acm_tty_cleanup(struct tty_struct *tty)
752 {
753 struct acm *acm = tty->driver_data;
754
755 tty_port_put(&acm->port);
756 }
757
758 static void acm_tty_hangup(struct tty_struct *tty)
759 {
760 struct acm *acm = tty->driver_data;
761
762 tty_port_hangup(&acm->port);
763 }
764
765 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
766 {
767 struct acm *acm = tty->driver_data;
768
769 tty_port_close(&acm->port, tty, filp);
770 }
771
772 static int acm_tty_write(struct tty_struct *tty,
773 const unsigned char *buf, int count)
774 {
775 struct acm *acm = tty->driver_data;
776 int stat;
777 unsigned long flags;
778 int wbn;
779 struct acm_wb *wb;
780
781 if (!count)
782 return 0;
783
784 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
785
786 spin_lock_irqsave(&acm->write_lock, flags);
787 wbn = acm_wb_alloc(acm);
788 if (wbn < 0) {
789 spin_unlock_irqrestore(&acm->write_lock, flags);
790 return 0;
791 }
792 wb = &acm->wb[wbn];
793
794 if (!acm->dev) {
795 wb->use = 0;
796 spin_unlock_irqrestore(&acm->write_lock, flags);
797 return -ENODEV;
798 }
799
800 count = (count > acm->writesize) ? acm->writesize : count;
801 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
802 memcpy(wb->buf, buf, count);
803 wb->len = count;
804
805 stat = usb_autopm_get_interface_async(acm->control);
806 if (stat) {
807 wb->use = 0;
808 spin_unlock_irqrestore(&acm->write_lock, flags);
809 return stat;
810 }
811
812 if (acm->susp_count) {
813 usb_anchor_urb(wb->urb, &acm->delayed);
814 spin_unlock_irqrestore(&acm->write_lock, flags);
815 return count;
816 }
817
818 stat = acm_start_wb(acm, wb);
819 spin_unlock_irqrestore(&acm->write_lock, flags);
820
821 if (stat < 0)
822 return stat;
823 return count;
824 }
825
826 static int acm_tty_write_room(struct tty_struct *tty)
827 {
828 struct acm *acm = tty->driver_data;
829 /*
830 * Do not let the line discipline to know that we have a reserve,
831 * or it might get too enthusiastic.
832 */
833 return acm_wb_is_avail(acm) ? acm->writesize : 0;
834 }
835
836 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
837 {
838 struct acm *acm = tty->driver_data;
839 /*
840 * if the device was unplugged then any remaining characters fell out
841 * of the connector ;)
842 */
843 if (acm->disconnected)
844 return 0;
845 /*
846 * This is inaccurate (overcounts), but it works.
847 */
848 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
849 }
850
851 static void acm_tty_throttle(struct tty_struct *tty)
852 {
853 struct acm *acm = tty->driver_data;
854
855 set_bit(ACM_THROTTLED, &acm->flags);
856 }
857
858 static void acm_tty_unthrottle(struct tty_struct *tty)
859 {
860 struct acm *acm = tty->driver_data;
861
862 clear_bit(ACM_THROTTLED, &acm->flags);
863
864 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */
865 smp_mb();
866
867 acm_submit_read_urbs(acm, GFP_KERNEL);
868 }
869
870 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
871 {
872 struct acm *acm = tty->driver_data;
873 int retval;
874
875 retval = acm_send_break(acm, state ? 0xffff : 0);
876 if (retval < 0)
877 dev_dbg(&acm->control->dev,
878 "%s - send break failed\n", __func__);
879 return retval;
880 }
881
882 static int acm_tty_tiocmget(struct tty_struct *tty)
883 {
884 struct acm *acm = tty->driver_data;
885
886 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
887 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
888 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
889 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
890 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
891 TIOCM_CTS;
892 }
893
894 static int acm_tty_tiocmset(struct tty_struct *tty,
895 unsigned int set, unsigned int clear)
896 {
897 struct acm *acm = tty->driver_data;
898 unsigned int newctrl;
899
900 newctrl = acm->ctrlout;
901 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
902 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
903 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
904 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
905
906 newctrl = (newctrl & ~clear) | set;
907
908 if (acm->ctrlout == newctrl)
909 return 0;
910 return acm_set_control(acm, acm->ctrlout = newctrl);
911 }
912
913 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
914 {
915 struct acm *acm = tty->driver_data;
916
917 ss->xmit_fifo_size = acm->writesize;
918 ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
919 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
920 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
921 ASYNC_CLOSING_WAIT_NONE :
922 jiffies_to_msecs(acm->port.closing_wait) / 10;
923 return 0;
924 }
925
926 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
927 {
928 struct acm *acm = tty->driver_data;
929 unsigned int closing_wait, close_delay;
930 unsigned int old_closing_wait, old_close_delay;
931 int retval = 0;
932
933 close_delay = msecs_to_jiffies(ss->close_delay * 10);
934 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
935 ASYNC_CLOSING_WAIT_NONE :
936 msecs_to_jiffies(ss->closing_wait * 10);
937
938 /* we must redo the rounding here, so that the values match */
939 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
940 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
941 ASYNC_CLOSING_WAIT_NONE :
942 jiffies_to_msecs(acm->port.closing_wait) / 10;
943
944 mutex_lock(&acm->port.mutex);
945
946 if (!capable(CAP_SYS_ADMIN)) {
947 if ((ss->close_delay != old_close_delay) ||
948 (ss->closing_wait != old_closing_wait))
949 retval = -EPERM;
950 else
951 retval = -EOPNOTSUPP;
952 } else {
953 acm->port.close_delay = close_delay;
954 acm->port.closing_wait = closing_wait;
955 }
956
957 mutex_unlock(&acm->port.mutex);
958 return retval;
959 }
960
961 static int wait_serial_change(struct acm *acm, unsigned long arg)
962 {
963 int rv = 0;
964 DECLARE_WAITQUEUE(wait, current);
965 struct async_icount old, new;
966
967 do {
968 spin_lock_irq(&acm->read_lock);
969 old = acm->oldcount;
970 new = acm->iocount;
971 acm->oldcount = new;
972 spin_unlock_irq(&acm->read_lock);
973
974 if ((arg & TIOCM_DSR) &&
975 old.dsr != new.dsr)
976 break;
977 if ((arg & TIOCM_CD) &&
978 old.dcd != new.dcd)
979 break;
980 if ((arg & TIOCM_RI) &&
981 old.rng != new.rng)
982 break;
983
984 add_wait_queue(&acm->wioctl, &wait);
985 set_current_state(TASK_INTERRUPTIBLE);
986 schedule();
987 remove_wait_queue(&acm->wioctl, &wait);
988 if (acm->disconnected) {
989 if (arg & TIOCM_CD)
990 break;
991 else
992 rv = -ENODEV;
993 } else {
994 if (signal_pending(current))
995 rv = -ERESTARTSYS;
996 }
997 } while (!rv);
998
999
1000
1001 return rv;
1002 }
1003
1004 static int acm_tty_get_icount(struct tty_struct *tty,
1005 struct serial_icounter_struct *icount)
1006 {
1007 struct acm *acm = tty->driver_data;
1008
1009 icount->dsr = acm->iocount.dsr;
1010 icount->rng = acm->iocount.rng;
1011 icount->dcd = acm->iocount.dcd;
1012 icount->frame = acm->iocount.frame;
1013 icount->overrun = acm->iocount.overrun;
1014 icount->parity = acm->iocount.parity;
1015 icount->brk = acm->iocount.brk;
1016
1017 return 0;
1018 }
1019
1020 static int acm_tty_ioctl(struct tty_struct *tty,
1021 unsigned int cmd, unsigned long arg)
1022 {
1023 struct acm *acm = tty->driver_data;
1024 int rv = -ENOIOCTLCMD;
1025
1026 switch (cmd) {
1027 case TIOCMIWAIT:
1028 rv = usb_autopm_get_interface(acm->control);
1029 if (rv < 0) {
1030 rv = -EIO;
1031 break;
1032 }
1033 rv = wait_serial_change(acm, arg);
1034 usb_autopm_put_interface(acm->control);
1035 break;
1036 }
1037
1038 return rv;
1039 }
1040
1041 static void acm_tty_set_termios(struct tty_struct *tty,
1042 struct ktermios *termios_old)
1043 {
1044 struct acm *acm = tty->driver_data;
1045 struct ktermios *termios = &tty->termios;
1046 struct usb_cdc_line_coding newline;
1047 int newctrl = acm->ctrlout;
1048
1049 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1050 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1051 newline.bParityType = termios->c_cflag & PARENB ?
1052 (termios->c_cflag & PARODD ? 1 : 2) +
1053 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1054 switch (termios->c_cflag & CSIZE) {
1055 case CS5:
1056 newline.bDataBits = 5;
1057 break;
1058 case CS6:
1059 newline.bDataBits = 6;
1060 break;
1061 case CS7:
1062 newline.bDataBits = 7;
1063 break;
1064 case CS8:
1065 default:
1066 newline.bDataBits = 8;
1067 break;
1068 }
1069 /* FIXME: Needs to clear unsupported bits in the termios */
1070 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1071
1072 if (C_BAUD(tty) == B0) {
1073 newline.dwDTERate = acm->line.dwDTERate;
1074 newctrl &= ~ACM_CTRL_DTR;
1075 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1076 newctrl |= ACM_CTRL_DTR;
1077 }
1078
1079 if (newctrl != acm->ctrlout)
1080 acm_set_control(acm, acm->ctrlout = newctrl);
1081
1082 if (memcmp(&acm->line, &newline, sizeof newline)) {
1083 memcpy(&acm->line, &newline, sizeof newline);
1084 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1085 __func__,
1086 le32_to_cpu(newline.dwDTERate),
1087 newline.bCharFormat, newline.bParityType,
1088 newline.bDataBits);
1089 acm_set_line(acm, &acm->line);
1090 }
1091 }
1092
1093 static const struct tty_port_operations acm_port_ops = {
1094 .dtr_rts = acm_port_dtr_rts,
1095 .shutdown = acm_port_shutdown,
1096 .activate = acm_port_activate,
1097 .destruct = acm_port_destruct,
1098 };
1099
1100 /*
1101 * USB probe and disconnect routines.
1102 */
1103
1104 /* Little helpers: write/read buffers free */
1105 static void acm_write_buffers_free(struct acm *acm)
1106 {
1107 int i;
1108 struct acm_wb *wb;
1109
1110 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1111 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1112 }
1113
1114 static void acm_read_buffers_free(struct acm *acm)
1115 {
1116 int i;
1117
1118 for (i = 0; i < acm->rx_buflimit; i++)
1119 usb_free_coherent(acm->dev, acm->readsize,
1120 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1121 }
1122
1123 /* Little helper: write buffers allocate */
1124 static int acm_write_buffers_alloc(struct acm *acm)
1125 {
1126 int i;
1127 struct acm_wb *wb;
1128
1129 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1130 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1131 &wb->dmah);
1132 if (!wb->buf) {
1133 while (i != 0) {
1134 --i;
1135 --wb;
1136 usb_free_coherent(acm->dev, acm->writesize,
1137 wb->buf, wb->dmah);
1138 }
1139 return -ENOMEM;
1140 }
1141 }
1142 return 0;
1143 }
1144
1145 static int acm_probe(struct usb_interface *intf,
1146 const struct usb_device_id *id)
1147 {
1148 struct usb_cdc_union_desc *union_header = NULL;
1149 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1150 unsigned char *buffer = intf->altsetting->extra;
1151 int buflen = intf->altsetting->extralen;
1152 struct usb_interface *control_interface;
1153 struct usb_interface *data_interface;
1154 struct usb_endpoint_descriptor *epctrl = NULL;
1155 struct usb_endpoint_descriptor *epread = NULL;
1156 struct usb_endpoint_descriptor *epwrite = NULL;
1157 struct usb_device *usb_dev = interface_to_usbdev(intf);
1158 struct usb_cdc_parsed_header h;
1159 struct acm *acm;
1160 int minor;
1161 int ctrlsize, readsize;
1162 u8 *buf;
1163 int call_intf_num = -1;
1164 int data_intf_num = -1;
1165 unsigned long quirks;
1166 int num_rx_buf;
1167 int i;
1168 int combined_interfaces = 0;
1169 struct device *tty_dev;
1170 int rv = -ENOMEM;
1171 int res;
1172
1173 /* normal quirks */
1174 quirks = (unsigned long)id->driver_info;
1175
1176 if (quirks == IGNORE_DEVICE)
1177 return -ENODEV;
1178
1179 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1180
1181 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1182
1183 /* handle quirks deadly to normal probing*/
1184 if (quirks == NO_UNION_NORMAL) {
1185 data_interface = usb_ifnum_to_if(usb_dev, 1);
1186 control_interface = usb_ifnum_to_if(usb_dev, 0);
1187 /* we would crash */
1188 if (!data_interface || !control_interface)
1189 return -ENODEV;
1190 goto skip_normal_probe;
1191 }
1192
1193 /* normal probing*/
1194 if (!buffer) {
1195 dev_err(&intf->dev, "Weird descriptor references\n");
1196 return -EINVAL;
1197 }
1198
1199 if (!intf->cur_altsetting)
1200 return -EINVAL;
1201
1202 if (!buflen) {
1203 if (intf->cur_altsetting->endpoint &&
1204 intf->cur_altsetting->endpoint->extralen &&
1205 intf->cur_altsetting->endpoint->extra) {
1206 dev_dbg(&intf->dev,
1207 "Seeking extra descriptors on endpoint\n");
1208 buflen = intf->cur_altsetting->endpoint->extralen;
1209 buffer = intf->cur_altsetting->endpoint->extra;
1210 } else {
1211 dev_err(&intf->dev,
1212 "Zero length descriptor references\n");
1213 return -EINVAL;
1214 }
1215 }
1216
1217 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1218 union_header = h.usb_cdc_union_desc;
1219 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1220 if (cmgmd)
1221 call_intf_num = cmgmd->bDataInterface;
1222
1223 if (!union_header) {
1224 if (call_intf_num > 0) {
1225 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1226 /* quirks for Droids MuIn LCD */
1227 if (quirks & NO_DATA_INTERFACE) {
1228 data_interface = usb_ifnum_to_if(usb_dev, 0);
1229 } else {
1230 data_intf_num = call_intf_num;
1231 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1232 }
1233 control_interface = intf;
1234 } else {
1235 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1236 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1237 return -ENODEV;
1238 } else {
1239 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1240 combined_interfaces = 1;
1241 control_interface = data_interface = intf;
1242 goto look_for_collapsed_interface;
1243 }
1244 }
1245 } else {
1246 data_intf_num = union_header->bSlaveInterface0;
1247 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1248 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1249 }
1250
1251 if (!control_interface || !data_interface) {
1252 dev_dbg(&intf->dev, "no interfaces\n");
1253 return -ENODEV;
1254 }
1255 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1256 return -ENODEV;
1257
1258 if (data_intf_num != call_intf_num)
1259 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1260
1261 if (control_interface == data_interface) {
1262 /* some broken devices designed for windows work this way */
1263 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1264 combined_interfaces = 1;
1265 /* a popular other OS doesn't use it */
1266 quirks |= NO_CAP_LINE;
1267 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1268 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1269 return -EINVAL;
1270 }
1271 look_for_collapsed_interface:
1272 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1273 &epread, &epwrite, &epctrl, NULL);
1274 if (res)
1275 return res;
1276
1277 goto made_compressed_probe;
1278 }
1279
1280 skip_normal_probe:
1281
1282 /*workaround for switched interfaces */
1283 if (data_interface->cur_altsetting->desc.bInterfaceClass
1284 != CDC_DATA_INTERFACE_TYPE) {
1285 if (control_interface->cur_altsetting->desc.bInterfaceClass
1286 == CDC_DATA_INTERFACE_TYPE) {
1287 dev_dbg(&intf->dev,
1288 "Your device has switched interfaces.\n");
1289 swap(control_interface, data_interface);
1290 } else {
1291 return -EINVAL;
1292 }
1293 }
1294
1295 /* Accept probe requests only for the control interface */
1296 if (!combined_interfaces && intf != control_interface)
1297 return -ENODEV;
1298
1299 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1300 /* valid in this context */
1301 dev_dbg(&intf->dev, "The data interface isn't available\n");
1302 return -EBUSY;
1303 }
1304
1305
1306 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1307 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1308 return -EINVAL;
1309
1310 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1311 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1312 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1313
1314
1315 /* workaround for switched endpoints */
1316 if (!usb_endpoint_dir_in(epread)) {
1317 /* descriptors are swapped */
1318 dev_dbg(&intf->dev,
1319 "The data interface has switched endpoints\n");
1320 swap(epread, epwrite);
1321 }
1322 made_compressed_probe:
1323 dev_dbg(&intf->dev, "interfaces are valid\n");
1324
1325 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1326 if (acm == NULL)
1327 goto alloc_fail;
1328
1329 tty_port_init(&acm->port);
1330 acm->port.ops = &acm_port_ops;
1331
1332 ctrlsize = usb_endpoint_maxp(epctrl);
1333 readsize = usb_endpoint_maxp(epread) *
1334 (quirks == SINGLE_RX_URB ? 1 : 2);
1335 acm->combined_interfaces = combined_interfaces;
1336 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1337 acm->control = control_interface;
1338 acm->data = data_interface;
1339
1340 usb_get_intf(acm->control); /* undone in destruct() */
1341
1342 minor = acm_alloc_minor(acm);
1343 if (minor < 0)
1344 goto alloc_fail1;
1345
1346 acm->minor = minor;
1347 acm->dev = usb_dev;
1348 if (h.usb_cdc_acm_descriptor)
1349 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1350 if (quirks & NO_CAP_LINE)
1351 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1352 acm->ctrlsize = ctrlsize;
1353 acm->readsize = readsize;
1354 acm->rx_buflimit = num_rx_buf;
1355 INIT_WORK(&acm->work, acm_softint);
1356 INIT_DELAYED_WORK(&acm->dwork, acm_softint);
1357 init_waitqueue_head(&acm->wioctl);
1358 spin_lock_init(&acm->write_lock);
1359 spin_lock_init(&acm->read_lock);
1360 mutex_init(&acm->mutex);
1361 if (usb_endpoint_xfer_int(epread)) {
1362 acm->bInterval = epread->bInterval;
1363 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1364 } else {
1365 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1366 }
1367 if (usb_endpoint_xfer_int(epwrite))
1368 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1369 else
1370 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1371 init_usb_anchor(&acm->delayed);
1372 acm->quirks = quirks;
1373
1374 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1375 if (!buf)
1376 goto alloc_fail1;
1377 acm->ctrl_buffer = buf;
1378
1379 if (acm_write_buffers_alloc(acm) < 0)
1380 goto alloc_fail2;
1381
1382 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1383 if (!acm->ctrlurb)
1384 goto alloc_fail3;
1385
1386 for (i = 0; i < num_rx_buf; i++) {
1387 struct acm_rb *rb = &(acm->read_buffers[i]);
1388 struct urb *urb;
1389
1390 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1391 &rb->dma);
1392 if (!rb->base)
1393 goto alloc_fail4;
1394 rb->index = i;
1395 rb->instance = acm;
1396
1397 urb = usb_alloc_urb(0, GFP_KERNEL);
1398 if (!urb)
1399 goto alloc_fail4;
1400
1401 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1402 urb->transfer_dma = rb->dma;
1403 if (usb_endpoint_xfer_int(epread))
1404 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1405 acm->readsize,
1406 acm_read_bulk_callback, rb,
1407 acm->bInterval);
1408 else
1409 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1410 acm->readsize,
1411 acm_read_bulk_callback, rb);
1412
1413 acm->read_urbs[i] = urb;
1414 __set_bit(i, &acm->read_urbs_free);
1415 }
1416 for (i = 0; i < ACM_NW; i++) {
1417 struct acm_wb *snd = &(acm->wb[i]);
1418
1419 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1420 if (snd->urb == NULL)
1421 goto alloc_fail5;
1422
1423 if (usb_endpoint_xfer_int(epwrite))
1424 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1425 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1426 else
1427 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1428 NULL, acm->writesize, acm_write_bulk, snd);
1429 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1430 if (quirks & SEND_ZERO_PACKET)
1431 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1432 snd->instance = acm;
1433 }
1434
1435 usb_set_intfdata(intf, acm);
1436
1437 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1438 if (i < 0)
1439 goto alloc_fail5;
1440
1441 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1442 struct usb_cdc_country_functional_desc * cfd =
1443 h.usb_cdc_country_functional_desc;
1444
1445 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1446 if (!acm->country_codes)
1447 goto skip_countries;
1448 acm->country_code_size = cfd->bLength - 4;
1449 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1450 cfd->bLength - 4);
1451 acm->country_rel_date = cfd->iCountryCodeRelDate;
1452
1453 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1454 if (i < 0) {
1455 kfree(acm->country_codes);
1456 acm->country_codes = NULL;
1457 acm->country_code_size = 0;
1458 goto skip_countries;
1459 }
1460
1461 i = device_create_file(&intf->dev,
1462 &dev_attr_iCountryCodeRelDate);
1463 if (i < 0) {
1464 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1465 kfree(acm->country_codes);
1466 acm->country_codes = NULL;
1467 acm->country_code_size = 0;
1468 goto skip_countries;
1469 }
1470 }
1471
1472 skip_countries:
1473 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1474 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1475 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1476 /* works around buggy devices */
1477 epctrl->bInterval ? epctrl->bInterval : 16);
1478 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1479 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1480 acm->notification_buffer = NULL;
1481 acm->nb_index = 0;
1482 acm->nb_size = 0;
1483
1484 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1485
1486 acm->line.dwDTERate = cpu_to_le32(9600);
1487 acm->line.bDataBits = 8;
1488 acm_set_line(acm, &acm->line);
1489
1490 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1491 usb_set_intfdata(data_interface, acm);
1492
1493 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1494 &control_interface->dev);
1495 if (IS_ERR(tty_dev)) {
1496 rv = PTR_ERR(tty_dev);
1497 goto alloc_fail6;
1498 }
1499
1500 if (quirks & CLEAR_HALT_CONDITIONS) {
1501 usb_clear_halt(usb_dev, acm->in);
1502 usb_clear_halt(usb_dev, acm->out);
1503 }
1504
1505 return 0;
1506 alloc_fail6:
1507 if (acm->country_codes) {
1508 device_remove_file(&acm->control->dev,
1509 &dev_attr_wCountryCodes);
1510 device_remove_file(&acm->control->dev,
1511 &dev_attr_iCountryCodeRelDate);
1512 kfree(acm->country_codes);
1513 }
1514 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1515 alloc_fail5:
1516 usb_set_intfdata(intf, NULL);
1517 for (i = 0; i < ACM_NW; i++)
1518 usb_free_urb(acm->wb[i].urb);
1519 alloc_fail4:
1520 for (i = 0; i < num_rx_buf; i++)
1521 usb_free_urb(acm->read_urbs[i]);
1522 acm_read_buffers_free(acm);
1523 usb_free_urb(acm->ctrlurb);
1524 alloc_fail3:
1525 acm_write_buffers_free(acm);
1526 alloc_fail2:
1527 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1528 alloc_fail1:
1529 tty_port_put(&acm->port);
1530 alloc_fail:
1531 return rv;
1532 }
1533
1534 static void acm_disconnect(struct usb_interface *intf)
1535 {
1536 struct acm *acm = usb_get_intfdata(intf);
1537 struct tty_struct *tty;
1538 int i;
1539
1540 /* sibling interface is already cleaning up */
1541 if (!acm)
1542 return;
1543
1544 mutex_lock(&acm->mutex);
1545 acm->disconnected = true;
1546 if (acm->country_codes) {
1547 device_remove_file(&acm->control->dev,
1548 &dev_attr_wCountryCodes);
1549 device_remove_file(&acm->control->dev,
1550 &dev_attr_iCountryCodeRelDate);
1551 }
1552 wake_up_all(&acm->wioctl);
1553 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1554 usb_set_intfdata(acm->control, NULL);
1555 usb_set_intfdata(acm->data, NULL);
1556 mutex_unlock(&acm->mutex);
1557
1558 tty = tty_port_tty_get(&acm->port);
1559 if (tty) {
1560 tty_vhangup(tty);
1561 tty_kref_put(tty);
1562 }
1563
1564 acm_kill_urbs(acm);
1565 cancel_work_sync(&acm->work);
1566 cancel_delayed_work_sync(&acm->dwork);
1567
1568 tty_unregister_device(acm_tty_driver, acm->minor);
1569
1570 usb_free_urb(acm->ctrlurb);
1571 for (i = 0; i < ACM_NW; i++)
1572 usb_free_urb(acm->wb[i].urb);
1573 for (i = 0; i < acm->rx_buflimit; i++)
1574 usb_free_urb(acm->read_urbs[i]);
1575 acm_write_buffers_free(acm);
1576 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1577 acm_read_buffers_free(acm);
1578
1579 kfree(acm->notification_buffer);
1580
1581 if (!acm->combined_interfaces)
1582 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1583 acm->data : acm->control);
1584
1585 tty_port_put(&acm->port);
1586 }
1587
1588 #ifdef CONFIG_PM
1589 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1590 {
1591 struct acm *acm = usb_get_intfdata(intf);
1592 int cnt;
1593
1594 spin_lock_irq(&acm->write_lock);
1595 if (PMSG_IS_AUTO(message)) {
1596 if (acm->transmitting) {
1597 spin_unlock_irq(&acm->write_lock);
1598 return -EBUSY;
1599 }
1600 }
1601 cnt = acm->susp_count++;
1602 spin_unlock_irq(&acm->write_lock);
1603
1604 if (cnt)
1605 return 0;
1606
1607 acm_kill_urbs(acm);
1608 cancel_work_sync(&acm->work);
1609 cancel_delayed_work_sync(&acm->dwork);
1610 acm->urbs_in_error_delay = 0;
1611
1612 return 0;
1613 }
1614
1615 static int acm_resume(struct usb_interface *intf)
1616 {
1617 struct acm *acm = usb_get_intfdata(intf);
1618 struct urb *urb;
1619 int rv = 0;
1620
1621 spin_lock_irq(&acm->write_lock);
1622
1623 if (--acm->susp_count)
1624 goto out;
1625
1626 if (tty_port_initialized(&acm->port)) {
1627 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1628
1629 for (;;) {
1630 urb = usb_get_from_anchor(&acm->delayed);
1631 if (!urb)
1632 break;
1633
1634 acm_start_wb(acm, urb->context);
1635 }
1636
1637 /*
1638 * delayed error checking because we must
1639 * do the write path at all cost
1640 */
1641 if (rv < 0)
1642 goto out;
1643
1644 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1645 }
1646 out:
1647 spin_unlock_irq(&acm->write_lock);
1648
1649 return rv;
1650 }
1651
1652 static int acm_reset_resume(struct usb_interface *intf)
1653 {
1654 struct acm *acm = usb_get_intfdata(intf);
1655
1656 if (tty_port_initialized(&acm->port))
1657 tty_port_tty_hangup(&acm->port, false);
1658
1659 return acm_resume(intf);
1660 }
1661
1662 #endif /* CONFIG_PM */
1663
1664 static int acm_pre_reset(struct usb_interface *intf)
1665 {
1666 struct acm *acm = usb_get_intfdata(intf);
1667
1668 clear_bit(EVENT_RX_STALL, &acm->flags);
1669 acm->nb_index = 0; /* pending control transfers are lost */
1670
1671 return 0;
1672 }
1673
1674 #define NOKIA_PCSUITE_ACM_INFO(x) \
1675 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1676 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1677 USB_CDC_ACM_PROTO_VENDOR)
1678
1679 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1680 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1681 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1682 USB_CDC_ACM_PROTO_VENDOR)
1683
1684 /*
1685 * USB driver structure.
1686 */
1687
1688 static const struct usb_device_id acm_ids[] = {
1689 /* quirky and broken devices */
1690 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */
1691 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */
1692 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1693 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1694 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1695 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1696 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1698 },
1699 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1701 },
1702 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */
1703 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
1704 },
1705 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1707 },
1708 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1709 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1710 },
1711 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1712 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1713 },
1714 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1715 .driver_info = SINGLE_RX_URB,
1716 },
1717 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1718 .driver_info = SINGLE_RX_URB, /* firmware bug */
1719 },
1720 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1721 .driver_info = SINGLE_RX_URB, /* firmware bug */
1722 },
1723 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1724 .driver_info = SINGLE_RX_URB,
1725 },
1726 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
1727 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1728 },
1729 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1730 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1731 },
1732 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1733 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1734 },
1735 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1736 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1737 },
1738 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1739 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1740 },
1741 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1743 },
1744 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1746 },
1747 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1748 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1749 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1750 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1751 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1752 },
1753 /* Motorola H24 HSPA module: */
1754 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1755 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1756 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1757 },
1758 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1759 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1760 },
1761 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1762 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1763 },
1764 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1765 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1766 },
1767 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1768 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1769 },
1770 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1771 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1772 },
1773 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1774 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1775 },
1776
1777 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1778 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1779 data interface instead of
1780 communications interface.
1781 Maybe we should define a new
1782 quirk for this. */
1783 },
1784 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1785 .driver_info = NO_UNION_NORMAL,
1786 },
1787 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1788 .driver_info = NO_UNION_NORMAL,
1789 },
1790 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1791 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1792 },
1793 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1794 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1795 },
1796 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1797 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1798 },
1799 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1800 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1801 },
1802 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
1803 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1804 },
1805
1806 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1807 .driver_info = CLEAR_HALT_CONDITIONS,
1808 },
1809
1810 /* Nokia S60 phones expose two ACM channels. The first is
1811 * a modem and is picked up by the standard AT-command
1812 * information below. The second is 'vendor-specific' but
1813 * is treated as a serial device at the S60 end, so we want
1814 * to expose it on Linux too. */
1815 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1817 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1822 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1827 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1830 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1831 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1832 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1833 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1834 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1835 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1836 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1837 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1838 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1839 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1840 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1841 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1842 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1844 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1845 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1846 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1847 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1848 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1849 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1851 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1853 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1855 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1856 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1857 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1858 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1859 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1860 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1861 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1862 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1863 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1864 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1865 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1866 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1867 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1868 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1869 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1870 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1871 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1872 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1873
1874 /* Support for Owen devices */
1875 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1876
1877 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1878
1879 /* Support for Droids MuIn LCD */
1880 { USB_DEVICE(0x04d8, 0x000b),
1881 .driver_info = NO_DATA_INTERFACE,
1882 },
1883
1884 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1885 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1886 .driver_info = IGNORE_DEVICE,
1887 },
1888 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1889 .driver_info = IGNORE_DEVICE,
1890 },
1891 #endif
1892
1893 /*Samsung phone in firmware update mode */
1894 { USB_DEVICE(0x04e8, 0x685d),
1895 .driver_info = IGNORE_DEVICE,
1896 },
1897
1898 /* Exclude Infineon Flash Loader utility */
1899 { USB_DEVICE(0x058b, 0x0041),
1900 .driver_info = IGNORE_DEVICE,
1901 },
1902
1903 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
1904 .driver_info = SEND_ZERO_PACKET,
1905 },
1906 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
1907 .driver_info = SEND_ZERO_PACKET,
1908 },
1909
1910 /* control interfaces without any protocol set */
1911 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1912 USB_CDC_PROTO_NONE) },
1913
1914 /* control interfaces with various AT-command sets */
1915 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1916 USB_CDC_ACM_PROTO_AT_V25TER) },
1917 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1918 USB_CDC_ACM_PROTO_AT_PCCA101) },
1919 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1920 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1921 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1922 USB_CDC_ACM_PROTO_AT_GSM) },
1923 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1924 USB_CDC_ACM_PROTO_AT_3G) },
1925 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1926 USB_CDC_ACM_PROTO_AT_CDMA) },
1927
1928 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1929 .driver_info = SEND_ZERO_PACKET,
1930 },
1931
1932 { }
1933 };
1934
1935 MODULE_DEVICE_TABLE(usb, acm_ids);
1936
1937 static struct usb_driver acm_driver = {
1938 .name = "cdc_acm",
1939 .probe = acm_probe,
1940 .disconnect = acm_disconnect,
1941 #ifdef CONFIG_PM
1942 .suspend = acm_suspend,
1943 .resume = acm_resume,
1944 .reset_resume = acm_reset_resume,
1945 #endif
1946 .pre_reset = acm_pre_reset,
1947 .id_table = acm_ids,
1948 #ifdef CONFIG_PM
1949 .supports_autosuspend = 1,
1950 #endif
1951 .disable_hub_initiated_lpm = 1,
1952 };
1953
1954 /*
1955 * TTY driver structures.
1956 */
1957
1958 static const struct tty_operations acm_ops = {
1959 .install = acm_tty_install,
1960 .open = acm_tty_open,
1961 .close = acm_tty_close,
1962 .cleanup = acm_tty_cleanup,
1963 .hangup = acm_tty_hangup,
1964 .write = acm_tty_write,
1965 .write_room = acm_tty_write_room,
1966 .ioctl = acm_tty_ioctl,
1967 .throttle = acm_tty_throttle,
1968 .unthrottle = acm_tty_unthrottle,
1969 .chars_in_buffer = acm_tty_chars_in_buffer,
1970 .break_ctl = acm_tty_break_ctl,
1971 .set_termios = acm_tty_set_termios,
1972 .tiocmget = acm_tty_tiocmget,
1973 .tiocmset = acm_tty_tiocmset,
1974 .get_serial = get_serial_info,
1975 .set_serial = set_serial_info,
1976 .get_icount = acm_tty_get_icount,
1977 };
1978
1979 /*
1980 * Init / exit.
1981 */
1982
1983 static int __init acm_init(void)
1984 {
1985 int retval;
1986 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1987 if (!acm_tty_driver)
1988 return -ENOMEM;
1989 acm_tty_driver->driver_name = "acm",
1990 acm_tty_driver->name = "ttyACM",
1991 acm_tty_driver->major = ACM_TTY_MAJOR,
1992 acm_tty_driver->minor_start = 0,
1993 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1994 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1995 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1996 acm_tty_driver->init_termios = tty_std_termios;
1997 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1998 HUPCL | CLOCAL;
1999 tty_set_operations(acm_tty_driver, &acm_ops);
2000
2001 retval = tty_register_driver(acm_tty_driver);
2002 if (retval) {
2003 put_tty_driver(acm_tty_driver);
2004 return retval;
2005 }
2006
2007 retval = usb_register(&acm_driver);
2008 if (retval) {
2009 tty_unregister_driver(acm_tty_driver);
2010 put_tty_driver(acm_tty_driver);
2011 return retval;
2012 }
2013
2014 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2015
2016 return 0;
2017 }
2018
2019 static void __exit acm_exit(void)
2020 {
2021 usb_deregister(&acm_driver);
2022 tty_unregister_driver(acm_tty_driver);
2023 put_tty_driver(acm_tty_driver);
2024 idr_destroy(&acm_minors);
2025 }
2026
2027 module_init(acm_init);
2028 module_exit(acm_exit);
2029
2030 MODULE_AUTHOR(DRIVER_AUTHOR);
2031 MODULE_DESCRIPTION(DRIVER_DESC);
2032 MODULE_LICENSE("GPL");
2033 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux with added FPC-III support