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dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / usb / class / cdc-acm.c
blob739f8960811ac89d6f960a184155f4e0c602101a
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 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 * kmalloc ensures a valid notification_buffer after a
388 * use of kfree in case the previous allocation was too
389 * small. Final freeing is done on disconnect.
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 /* notification complete */
409 acm_process_notification(acm, (unsigned char *)dr);
410 acm->nb_index = 0;
411 }
412
413 exit:
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
420 static 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
443 static 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
457 static 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
467 static 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 * Unthrottle may run on another CPU which needs to see events
509 * in the same order. Submission has an implict barrier
510 */
511 smp_mb__before_atomic();
512
513 /* throttle device if requested by tty */
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 /* data interface wrote those outgoing bytes */
525 static 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
545 static 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 * TTY handlers
569 */
570
571 static 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 /*
585 * Suppress initial echoing for some devices which might send data
586 * immediately after acm driver has been installed.
587 */
588 if (acm->quirks & DISABLE_ECHO)
589 tty->termios.c_lflag &= ~ECHO;
590
591 tty->driver_data = acm;
592
593 return 0;
594
595 error_init_termios:
596 tty_port_put(&acm->port);
597 return retval;
598 }
599
600 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
601 {
602 struct acm *acm = tty->driver_data;
603
604 return tty_port_open(&acm->port, tty, filp);
605 }
606
607 static void acm_port_dtr_rts(struct tty_port *port, int raise)
608 {
609 struct acm *acm = container_of(port, struct acm, port);
610 int val;
611 int res;
612
613 if (raise)
614 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
615 else
616 val = 0;
617
618 /* FIXME: add missing ctrlout locking throughout driver */
619 acm->ctrlout = val;
620
621 res = acm_set_control(acm, val);
622 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
623 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
624 }
625
626 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
627 {
628 struct acm *acm = container_of(port, struct acm, port);
629 int retval = -ENODEV;
630 int i;
631
632 mutex_lock(&acm->mutex);
633 if (acm->disconnected)
634 goto disconnected;
635
636 retval = usb_autopm_get_interface(acm->control);
637 if (retval)
638 goto error_get_interface;
639
640 /*
641 * FIXME: Why do we need this? Allocating 64K of physically contiguous
642 * memory is really nasty...
643 */
644 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
645 acm->control->needs_remote_wakeup = 1;
646
647 acm->ctrlurb->dev = acm->dev;
648 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
649 if (retval) {
650 dev_err(&acm->control->dev,
651 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
652 goto error_submit_urb;
653 }
654
655 acm_tty_set_termios(tty, NULL);
656
657 /*
658 * Unthrottle device in case the TTY was closed while throttled.
659 */
660 spin_lock_irq(&acm->read_lock);
661 acm->throttled = 0;
662 acm->throttle_req = 0;
663 spin_unlock_irq(&acm->read_lock);
664
665 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
666 if (retval)
667 goto error_submit_read_urbs;
668
669 usb_autopm_put_interface(acm->control);
670
671 mutex_unlock(&acm->mutex);
672
673 return 0;
674
675 error_submit_read_urbs:
676 for (i = 0; i < acm->rx_buflimit; i++)
677 usb_kill_urb(acm->read_urbs[i]);
678 usb_kill_urb(acm->ctrlurb);
679 error_submit_urb:
680 usb_autopm_put_interface(acm->control);
681 error_get_interface:
682 disconnected:
683 mutex_unlock(&acm->mutex);
684
685 return usb_translate_errors(retval);
686 }
687
688 static void acm_port_destruct(struct tty_port *port)
689 {
690 struct acm *acm = container_of(port, struct acm, port);
691
692 acm_release_minor(acm);
693 usb_put_intf(acm->control);
694 kfree(acm->country_codes);
695 kfree(acm);
696 }
697
698 static void acm_port_shutdown(struct tty_port *port)
699 {
700 struct acm *acm = container_of(port, struct acm, port);
701 struct urb *urb;
702 struct acm_wb *wb;
703
704 /*
705 * Need to grab write_lock to prevent race with resume, but no need to
706 * hold it due to the tty-port initialised flag.
707 */
708 spin_lock_irq(&acm->write_lock);
709 spin_unlock_irq(&acm->write_lock);
710
711 usb_autopm_get_interface_no_resume(acm->control);
712 acm->control->needs_remote_wakeup = 0;
713 usb_autopm_put_interface(acm->control);
714
715 for (;;) {
716 urb = usb_get_from_anchor(&acm->delayed);
717 if (!urb)
718 break;
719 wb = urb->context;
720 wb->use = 0;
721 usb_autopm_put_interface_async(acm->control);
722 }
723
724 acm_kill_urbs(acm);
725 }
726
727 static void acm_tty_cleanup(struct tty_struct *tty)
728 {
729 struct acm *acm = tty->driver_data;
730
731 tty_port_put(&acm->port);
732 }
733
734 static void acm_tty_hangup(struct tty_struct *tty)
735 {
736 struct acm *acm = tty->driver_data;
737
738 tty_port_hangup(&acm->port);
739 }
740
741 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
742 {
743 struct acm *acm = tty->driver_data;
744
745 tty_port_close(&acm->port, tty, filp);
746 }
747
748 static int acm_tty_write(struct tty_struct *tty,
749 const unsigned char *buf, int count)
750 {
751 struct acm *acm = tty->driver_data;
752 int stat;
753 unsigned long flags;
754 int wbn;
755 struct acm_wb *wb;
756
757 if (!count)
758 return 0;
759
760 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
761
762 spin_lock_irqsave(&acm->write_lock, flags);
763 wbn = acm_wb_alloc(acm);
764 if (wbn < 0) {
765 spin_unlock_irqrestore(&acm->write_lock, flags);
766 return 0;
767 }
768 wb = &acm->wb[wbn];
769
770 if (!acm->dev) {
771 wb->use = 0;
772 spin_unlock_irqrestore(&acm->write_lock, flags);
773 return -ENODEV;
774 }
775
776 count = (count > acm->writesize) ? acm->writesize : count;
777 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
778 memcpy(wb->buf, buf, count);
779 wb->len = count;
780
781 stat = usb_autopm_get_interface_async(acm->control);
782 if (stat) {
783 wb->use = 0;
784 spin_unlock_irqrestore(&acm->write_lock, flags);
785 return stat;
786 }
787
788 if (acm->susp_count) {
789 usb_anchor_urb(wb->urb, &acm->delayed);
790 spin_unlock_irqrestore(&acm->write_lock, flags);
791 return count;
792 }
793
794 stat = acm_start_wb(acm, wb);
795 spin_unlock_irqrestore(&acm->write_lock, flags);
796
797 if (stat < 0)
798 return stat;
799 return count;
800 }
801
802 static int acm_tty_write_room(struct tty_struct *tty)
803 {
804 struct acm *acm = tty->driver_data;
805 /*
806 * Do not let the line discipline to know that we have a reserve,
807 * or it might get too enthusiastic.
808 */
809 return acm_wb_is_avail(acm) ? acm->writesize : 0;
810 }
811
812 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
813 {
814 struct acm *acm = tty->driver_data;
815 /*
816 * if the device was unplugged then any remaining characters fell out
817 * of the connector ;)
818 */
819 if (acm->disconnected)
820 return 0;
821 /*
822 * This is inaccurate (overcounts), but it works.
823 */
824 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
825 }
826
827 static void acm_tty_throttle(struct tty_struct *tty)
828 {
829 struct acm *acm = tty->driver_data;
830
831 spin_lock_irq(&acm->read_lock);
832 acm->throttle_req = 1;
833 spin_unlock_irq(&acm->read_lock);
834 }
835
836 static void acm_tty_unthrottle(struct tty_struct *tty)
837 {
838 struct acm *acm = tty->driver_data;
839 unsigned int was_throttled;
840
841 spin_lock_irq(&acm->read_lock);
842 was_throttled = acm->throttled;
843 acm->throttled = 0;
844 acm->throttle_req = 0;
845 spin_unlock_irq(&acm->read_lock);
846
847 if (was_throttled)
848 acm_submit_read_urbs(acm, GFP_KERNEL);
849 }
850
851 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
852 {
853 struct acm *acm = tty->driver_data;
854 int retval;
855
856 retval = acm_send_break(acm, state ? 0xffff : 0);
857 if (retval < 0)
858 dev_dbg(&acm->control->dev,
859 "%s - send break failed\n", __func__);
860 return retval;
861 }
862
863 static int acm_tty_tiocmget(struct tty_struct *tty)
864 {
865 struct acm *acm = tty->driver_data;
866
867 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
868 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
869 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
870 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
871 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
872 TIOCM_CTS;
873 }
874
875 static int acm_tty_tiocmset(struct tty_struct *tty,
876 unsigned int set, unsigned int clear)
877 {
878 struct acm *acm = tty->driver_data;
879 unsigned int newctrl;
880
881 newctrl = acm->ctrlout;
882 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
883 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
884 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
885 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
886
887 newctrl = (newctrl & ~clear) | set;
888
889 if (acm->ctrlout == newctrl)
890 return 0;
891 return acm_set_control(acm, acm->ctrlout = newctrl);
892 }
893
894 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
895 {
896 struct acm *acm = tty->driver_data;
897
898 ss->xmit_fifo_size = acm->writesize;
899 ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
900 ss->close_delay = acm->port.close_delay / 10;
901 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
902 ASYNC_CLOSING_WAIT_NONE :
903 acm->port.closing_wait / 10;
904 return 0;
905 }
906
907 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
908 {
909 struct acm *acm = tty->driver_data;
910 unsigned int closing_wait, close_delay;
911 int retval = 0;
912
913 close_delay = ss->close_delay * 10;
914 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
915 ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
916
917 mutex_lock(&acm->port.mutex);
918
919 if (!capable(CAP_SYS_ADMIN)) {
920 if ((close_delay != acm->port.close_delay) ||
921 (closing_wait != acm->port.closing_wait))
922 retval = -EPERM;
923 else
924 retval = -EOPNOTSUPP;
925 } else {
926 acm->port.close_delay = close_delay;
927 acm->port.closing_wait = closing_wait;
928 }
929
930 mutex_unlock(&acm->port.mutex);
931 return retval;
932 }
933
934 static int wait_serial_change(struct acm *acm, unsigned long arg)
935 {
936 int rv = 0;
937 DECLARE_WAITQUEUE(wait, current);
938 struct async_icount old, new;
939
940 do {
941 spin_lock_irq(&acm->read_lock);
942 old = acm->oldcount;
943 new = acm->iocount;
944 acm->oldcount = new;
945 spin_unlock_irq(&acm->read_lock);
946
947 if ((arg & TIOCM_DSR) &&
948 old.dsr != new.dsr)
949 break;
950 if ((arg & TIOCM_CD) &&
951 old.dcd != new.dcd)
952 break;
953 if ((arg & TIOCM_RI) &&
954 old.rng != new.rng)
955 break;
956
957 add_wait_queue(&acm->wioctl, &wait);
958 set_current_state(TASK_INTERRUPTIBLE);
959 schedule();
960 remove_wait_queue(&acm->wioctl, &wait);
961 if (acm->disconnected) {
962 if (arg & TIOCM_CD)
963 break;
964 else
965 rv = -ENODEV;
966 } else {
967 if (signal_pending(current))
968 rv = -ERESTARTSYS;
969 }
970 } while (!rv);
971
972
973
974 return rv;
975 }
976
977 static int acm_tty_get_icount(struct tty_struct *tty,
978 struct serial_icounter_struct *icount)
979 {
980 struct acm *acm = tty->driver_data;
981
982 icount->dsr = acm->iocount.dsr;
983 icount->rng = acm->iocount.rng;
984 icount->dcd = acm->iocount.dcd;
985 icount->frame = acm->iocount.frame;
986 icount->overrun = acm->iocount.overrun;
987 icount->parity = acm->iocount.parity;
988 icount->brk = acm->iocount.brk;
989
990 return 0;
991 }
992
993 static int acm_tty_ioctl(struct tty_struct *tty,
994 unsigned int cmd, unsigned long arg)
995 {
996 struct acm *acm = tty->driver_data;
997 int rv = -ENOIOCTLCMD;
998
999 switch (cmd) {
1000 case TIOCMIWAIT:
1001 rv = usb_autopm_get_interface(acm->control);
1002 if (rv < 0) {
1003 rv = -EIO;
1004 break;
1005 }
1006 rv = wait_serial_change(acm, arg);
1007 usb_autopm_put_interface(acm->control);
1008 break;
1009 }
1010
1011 return rv;
1012 }
1013
1014 static void acm_tty_set_termios(struct tty_struct *tty,
1015 struct ktermios *termios_old)
1016 {
1017 struct acm *acm = tty->driver_data;
1018 struct ktermios *termios = &tty->termios;
1019 struct usb_cdc_line_coding newline;
1020 int newctrl = acm->ctrlout;
1021
1022 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1023 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1024 newline.bParityType = termios->c_cflag & PARENB ?
1025 (termios->c_cflag & PARODD ? 1 : 2) +
1026 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1027 switch (termios->c_cflag & CSIZE) {
1028 case CS5:
1029 newline.bDataBits = 5;
1030 break;
1031 case CS6:
1032 newline.bDataBits = 6;
1033 break;
1034 case CS7:
1035 newline.bDataBits = 7;
1036 break;
1037 case CS8:
1038 default:
1039 newline.bDataBits = 8;
1040 break;
1041 }
1042 /* FIXME: Needs to clear unsupported bits in the termios */
1043 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1044
1045 if (C_BAUD(tty) == B0) {
1046 newline.dwDTERate = acm->line.dwDTERate;
1047 newctrl &= ~ACM_CTRL_DTR;
1048 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1049 newctrl |= ACM_CTRL_DTR;
1050 }
1051
1052 if (newctrl != acm->ctrlout)
1053 acm_set_control(acm, acm->ctrlout = newctrl);
1054
1055 if (memcmp(&acm->line, &newline, sizeof newline)) {
1056 memcpy(&acm->line, &newline, sizeof newline);
1057 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1058 __func__,
1059 le32_to_cpu(newline.dwDTERate),
1060 newline.bCharFormat, newline.bParityType,
1061 newline.bDataBits);
1062 acm_set_line(acm, &acm->line);
1063 }
1064 }
1065
1066 static const struct tty_port_operations acm_port_ops = {
1067 .dtr_rts = acm_port_dtr_rts,
1068 .shutdown = acm_port_shutdown,
1069 .activate = acm_port_activate,
1070 .destruct = acm_port_destruct,
1071 };
1072
1073 /*
1074 * USB probe and disconnect routines.
1075 */
1076
1077 /* Little helpers: write/read buffers free */
1078 static void acm_write_buffers_free(struct acm *acm)
1079 {
1080 int i;
1081 struct acm_wb *wb;
1082
1083 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1084 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1085 }
1086
1087 static void acm_read_buffers_free(struct acm *acm)
1088 {
1089 int i;
1090
1091 for (i = 0; i < acm->rx_buflimit; i++)
1092 usb_free_coherent(acm->dev, acm->readsize,
1093 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1094 }
1095
1096 /* Little helper: write buffers allocate */
1097 static int acm_write_buffers_alloc(struct acm *acm)
1098 {
1099 int i;
1100 struct acm_wb *wb;
1101
1102 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1103 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1104 &wb->dmah);
1105 if (!wb->buf) {
1106 while (i != 0) {
1107 --i;
1108 --wb;
1109 usb_free_coherent(acm->dev, acm->writesize,
1110 wb->buf, wb->dmah);
1111 }
1112 return -ENOMEM;
1113 }
1114 }
1115 return 0;
1116 }
1117
1118 static int acm_probe(struct usb_interface *intf,
1119 const struct usb_device_id *id)
1120 {
1121 struct usb_cdc_union_desc *union_header = NULL;
1122 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1123 unsigned char *buffer = intf->altsetting->extra;
1124 int buflen = intf->altsetting->extralen;
1125 struct usb_interface *control_interface;
1126 struct usb_interface *data_interface;
1127 struct usb_endpoint_descriptor *epctrl = NULL;
1128 struct usb_endpoint_descriptor *epread = NULL;
1129 struct usb_endpoint_descriptor *epwrite = NULL;
1130 struct usb_device *usb_dev = interface_to_usbdev(intf);
1131 struct usb_cdc_parsed_header h;
1132 struct acm *acm;
1133 int minor;
1134 int ctrlsize, readsize;
1135 u8 *buf;
1136 int call_intf_num = -1;
1137 int data_intf_num = -1;
1138 unsigned long quirks;
1139 int num_rx_buf;
1140 int i;
1141 int combined_interfaces = 0;
1142 struct device *tty_dev;
1143 int rv = -ENOMEM;
1144 int res;
1145
1146 /* normal quirks */
1147 quirks = (unsigned long)id->driver_info;
1148
1149 if (quirks == IGNORE_DEVICE)
1150 return -ENODEV;
1151
1152 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1153
1154 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1155
1156 /* handle quirks deadly to normal probing*/
1157 if (quirks == NO_UNION_NORMAL) {
1158 data_interface = usb_ifnum_to_if(usb_dev, 1);
1159 control_interface = usb_ifnum_to_if(usb_dev, 0);
1160 /* we would crash */
1161 if (!data_interface || !control_interface)
1162 return -ENODEV;
1163 goto skip_normal_probe;
1164 }
1165
1166 /* normal probing*/
1167 if (!buffer) {
1168 dev_err(&intf->dev, "Weird descriptor references\n");
1169 return -EINVAL;
1170 }
1171
1172 if (!intf->cur_altsetting)
1173 return -EINVAL;
1174
1175 if (!buflen) {
1176 if (intf->cur_altsetting->endpoint &&
1177 intf->cur_altsetting->endpoint->extralen &&
1178 intf->cur_altsetting->endpoint->extra) {
1179 dev_dbg(&intf->dev,
1180 "Seeking extra descriptors on endpoint\n");
1181 buflen = intf->cur_altsetting->endpoint->extralen;
1182 buffer = intf->cur_altsetting->endpoint->extra;
1183 } else {
1184 dev_err(&intf->dev,
1185 "Zero length descriptor references\n");
1186 return -EINVAL;
1187 }
1188 }
1189
1190 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1191 union_header = h.usb_cdc_union_desc;
1192 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1193 if (cmgmd)
1194 call_intf_num = cmgmd->bDataInterface;
1195
1196 if (!union_header) {
1197 if (call_intf_num > 0) {
1198 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1199 /* quirks for Droids MuIn LCD */
1200 if (quirks & NO_DATA_INTERFACE) {
1201 data_interface = usb_ifnum_to_if(usb_dev, 0);
1202 } else {
1203 data_intf_num = call_intf_num;
1204 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1205 }
1206 control_interface = intf;
1207 } else {
1208 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1209 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1210 return -ENODEV;
1211 } else {
1212 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1213 combined_interfaces = 1;
1214 control_interface = data_interface = intf;
1215 goto look_for_collapsed_interface;
1216 }
1217 }
1218 } else {
1219 data_intf_num = union_header->bSlaveInterface0;
1220 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1221 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1222 }
1223
1224 if (!control_interface || !data_interface) {
1225 dev_dbg(&intf->dev, "no interfaces\n");
1226 return -ENODEV;
1227 }
1228 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1229 return -ENODEV;
1230
1231 if (data_intf_num != call_intf_num)
1232 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1233
1234 if (control_interface == data_interface) {
1235 /* some broken devices designed for windows work this way */
1236 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1237 combined_interfaces = 1;
1238 /* a popular other OS doesn't use it */
1239 quirks |= NO_CAP_LINE;
1240 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1241 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1242 return -EINVAL;
1243 }
1244 look_for_collapsed_interface:
1245 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1246 &epread, &epwrite, &epctrl, NULL);
1247 if (res)
1248 return res;
1249
1250 goto made_compressed_probe;
1251 }
1252
1253 skip_normal_probe:
1254
1255 /*workaround for switched interfaces */
1256 if (data_interface->cur_altsetting->desc.bInterfaceClass
1257 != CDC_DATA_INTERFACE_TYPE) {
1258 if (control_interface->cur_altsetting->desc.bInterfaceClass
1259 == CDC_DATA_INTERFACE_TYPE) {
1260 dev_dbg(&intf->dev,
1261 "Your device has switched interfaces.\n");
1262 swap(control_interface, data_interface);
1263 } else {
1264 return -EINVAL;
1265 }
1266 }
1267
1268 /* Accept probe requests only for the control interface */
1269 if (!combined_interfaces && intf != control_interface)
1270 return -ENODEV;
1271
1272 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1273 /* valid in this context */
1274 dev_dbg(&intf->dev, "The data interface isn't available\n");
1275 return -EBUSY;
1276 }
1277
1278
1279 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1280 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1281 return -EINVAL;
1282
1283 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1284 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1285 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1286
1287
1288 /* workaround for switched endpoints */
1289 if (!usb_endpoint_dir_in(epread)) {
1290 /* descriptors are swapped */
1291 dev_dbg(&intf->dev,
1292 "The data interface has switched endpoints\n");
1293 swap(epread, epwrite);
1294 }
1295 made_compressed_probe:
1296 dev_dbg(&intf->dev, "interfaces are valid\n");
1297
1298 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1299 if (acm == NULL)
1300 goto alloc_fail;
1301
1302 tty_port_init(&acm->port);
1303 acm->port.ops = &acm_port_ops;
1304
1305 minor = acm_alloc_minor(acm);
1306 if (minor < 0)
1307 goto alloc_fail1;
1308
1309 ctrlsize = usb_endpoint_maxp(epctrl);
1310 readsize = usb_endpoint_maxp(epread) *
1311 (quirks == SINGLE_RX_URB ? 1 : 2);
1312 acm->combined_interfaces = combined_interfaces;
1313 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1314 acm->control = control_interface;
1315 acm->data = data_interface;
1316 acm->minor = minor;
1317 acm->dev = usb_dev;
1318 if (h.usb_cdc_acm_descriptor)
1319 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1320 if (quirks & NO_CAP_LINE)
1321 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1322 acm->ctrlsize = ctrlsize;
1323 acm->readsize = readsize;
1324 acm->rx_buflimit = num_rx_buf;
1325 INIT_WORK(&acm->work, acm_softint);
1326 init_waitqueue_head(&acm->wioctl);
1327 spin_lock_init(&acm->write_lock);
1328 spin_lock_init(&acm->read_lock);
1329 mutex_init(&acm->mutex);
1330 if (usb_endpoint_xfer_int(epread)) {
1331 acm->bInterval = epread->bInterval;
1332 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1333 } else {
1334 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1335 }
1336 if (usb_endpoint_xfer_int(epwrite))
1337 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1338 else
1339 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1340 init_usb_anchor(&acm->delayed);
1341 acm->quirks = quirks;
1342
1343 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1344 if (!buf)
1345 goto alloc_fail1;
1346 acm->ctrl_buffer = buf;
1347
1348 if (acm_write_buffers_alloc(acm) < 0)
1349 goto alloc_fail2;
1350
1351 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1352 if (!acm->ctrlurb)
1353 goto alloc_fail3;
1354
1355 for (i = 0; i < num_rx_buf; i++) {
1356 struct acm_rb *rb = &(acm->read_buffers[i]);
1357 struct urb *urb;
1358
1359 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1360 &rb->dma);
1361 if (!rb->base)
1362 goto alloc_fail4;
1363 rb->index = i;
1364 rb->instance = acm;
1365
1366 urb = usb_alloc_urb(0, GFP_KERNEL);
1367 if (!urb)
1368 goto alloc_fail4;
1369
1370 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1371 urb->transfer_dma = rb->dma;
1372 if (usb_endpoint_xfer_int(epread))
1373 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1374 acm->readsize,
1375 acm_read_bulk_callback, rb,
1376 acm->bInterval);
1377 else
1378 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1379 acm->readsize,
1380 acm_read_bulk_callback, rb);
1381
1382 acm->read_urbs[i] = urb;
1383 __set_bit(i, &acm->read_urbs_free);
1384 }
1385 for (i = 0; i < ACM_NW; i++) {
1386 struct acm_wb *snd = &(acm->wb[i]);
1387
1388 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1389 if (snd->urb == NULL)
1390 goto alloc_fail5;
1391
1392 if (usb_endpoint_xfer_int(epwrite))
1393 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1394 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1395 else
1396 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1397 NULL, acm->writesize, acm_write_bulk, snd);
1398 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1399 if (quirks & SEND_ZERO_PACKET)
1400 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1401 snd->instance = acm;
1402 }
1403
1404 usb_set_intfdata(intf, acm);
1405
1406 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1407 if (i < 0)
1408 goto alloc_fail5;
1409
1410 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1411 struct usb_cdc_country_functional_desc * cfd =
1412 h.usb_cdc_country_functional_desc;
1413
1414 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1415 if (!acm->country_codes)
1416 goto skip_countries;
1417 acm->country_code_size = cfd->bLength - 4;
1418 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1419 cfd->bLength - 4);
1420 acm->country_rel_date = cfd->iCountryCodeRelDate;
1421
1422 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1423 if (i < 0) {
1424 kfree(acm->country_codes);
1425 acm->country_codes = NULL;
1426 acm->country_code_size = 0;
1427 goto skip_countries;
1428 }
1429
1430 i = device_create_file(&intf->dev,
1431 &dev_attr_iCountryCodeRelDate);
1432 if (i < 0) {
1433 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1434 kfree(acm->country_codes);
1435 acm->country_codes = NULL;
1436 acm->country_code_size = 0;
1437 goto skip_countries;
1438 }
1439 }
1440
1441 skip_countries:
1442 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1443 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1444 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1445 /* works around buggy devices */
1446 epctrl->bInterval ? epctrl->bInterval : 16);
1447 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1448 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1449 acm->notification_buffer = NULL;
1450 acm->nb_index = 0;
1451 acm->nb_size = 0;
1452
1453 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1454
1455 acm->line.dwDTERate = cpu_to_le32(9600);
1456 acm->line.bDataBits = 8;
1457 acm_set_line(acm, &acm->line);
1458
1459 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1460 usb_set_intfdata(data_interface, acm);
1461
1462 usb_get_intf(control_interface);
1463 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1464 &control_interface->dev);
1465 if (IS_ERR(tty_dev)) {
1466 rv = PTR_ERR(tty_dev);
1467 goto alloc_fail6;
1468 }
1469
1470 if (quirks & CLEAR_HALT_CONDITIONS) {
1471 usb_clear_halt(usb_dev, acm->in);
1472 usb_clear_halt(usb_dev, acm->out);
1473 }
1474
1475 return 0;
1476 alloc_fail6:
1477 if (acm->country_codes) {
1478 device_remove_file(&acm->control->dev,
1479 &dev_attr_wCountryCodes);
1480 device_remove_file(&acm->control->dev,
1481 &dev_attr_iCountryCodeRelDate);
1482 kfree(acm->country_codes);
1483 }
1484 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1485 alloc_fail5:
1486 usb_set_intfdata(intf, NULL);
1487 for (i = 0; i < ACM_NW; i++)
1488 usb_free_urb(acm->wb[i].urb);
1489 alloc_fail4:
1490 for (i = 0; i < num_rx_buf; i++)
1491 usb_free_urb(acm->read_urbs[i]);
1492 acm_read_buffers_free(acm);
1493 usb_free_urb(acm->ctrlurb);
1494 alloc_fail3:
1495 acm_write_buffers_free(acm);
1496 alloc_fail2:
1497 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1498 alloc_fail1:
1499 tty_port_put(&acm->port);
1500 alloc_fail:
1501 return rv;
1502 }
1503
1504 static void acm_disconnect(struct usb_interface *intf)
1505 {
1506 struct acm *acm = usb_get_intfdata(intf);
1507 struct tty_struct *tty;
1508 int i;
1509
1510 /* sibling interface is already cleaning up */
1511 if (!acm)
1512 return;
1513
1514 mutex_lock(&acm->mutex);
1515 acm->disconnected = true;
1516 if (acm->country_codes) {
1517 device_remove_file(&acm->control->dev,
1518 &dev_attr_wCountryCodes);
1519 device_remove_file(&acm->control->dev,
1520 &dev_attr_iCountryCodeRelDate);
1521 }
1522 wake_up_all(&acm->wioctl);
1523 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1524 usb_set_intfdata(acm->control, NULL);
1525 usb_set_intfdata(acm->data, NULL);
1526 mutex_unlock(&acm->mutex);
1527
1528 tty = tty_port_tty_get(&acm->port);
1529 if (tty) {
1530 tty_vhangup(tty);
1531 tty_kref_put(tty);
1532 }
1533
1534 acm_kill_urbs(acm);
1535 cancel_work_sync(&acm->work);
1536
1537 tty_unregister_device(acm_tty_driver, acm->minor);
1538
1539 usb_free_urb(acm->ctrlurb);
1540 for (i = 0; i < ACM_NW; i++)
1541 usb_free_urb(acm->wb[i].urb);
1542 for (i = 0; i < acm->rx_buflimit; i++)
1543 usb_free_urb(acm->read_urbs[i]);
1544 acm_write_buffers_free(acm);
1545 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1546 acm_read_buffers_free(acm);
1547
1548 kfree(acm->notification_buffer);
1549
1550 if (!acm->combined_interfaces)
1551 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1552 acm->data : acm->control);
1553
1554 tty_port_put(&acm->port);
1555 }
1556
1557 #ifdef CONFIG_PM
1558 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1559 {
1560 struct acm *acm = usb_get_intfdata(intf);
1561 int cnt;
1562
1563 spin_lock_irq(&acm->write_lock);
1564 if (PMSG_IS_AUTO(message)) {
1565 if (acm->transmitting) {
1566 spin_unlock_irq(&acm->write_lock);
1567 return -EBUSY;
1568 }
1569 }
1570 cnt = acm->susp_count++;
1571 spin_unlock_irq(&acm->write_lock);
1572
1573 if (cnt)
1574 return 0;
1575
1576 acm_kill_urbs(acm);
1577 cancel_work_sync(&acm->work);
1578
1579 return 0;
1580 }
1581
1582 static int acm_resume(struct usb_interface *intf)
1583 {
1584 struct acm *acm = usb_get_intfdata(intf);
1585 struct urb *urb;
1586 int rv = 0;
1587
1588 spin_lock_irq(&acm->write_lock);
1589
1590 if (--acm->susp_count)
1591 goto out;
1592
1593 if (tty_port_initialized(&acm->port)) {
1594 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1595
1596 for (;;) {
1597 urb = usb_get_from_anchor(&acm->delayed);
1598 if (!urb)
1599 break;
1600
1601 acm_start_wb(acm, urb->context);
1602 }
1603
1604 /*
1605 * delayed error checking because we must
1606 * do the write path at all cost
1607 */
1608 if (rv < 0)
1609 goto out;
1610
1611 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1612 }
1613 out:
1614 spin_unlock_irq(&acm->write_lock);
1615
1616 return rv;
1617 }
1618
1619 static int acm_reset_resume(struct usb_interface *intf)
1620 {
1621 struct acm *acm = usb_get_intfdata(intf);
1622
1623 if (tty_port_initialized(&acm->port))
1624 tty_port_tty_hangup(&acm->port, false);
1625
1626 return acm_resume(intf);
1627 }
1628
1629 #endif /* CONFIG_PM */
1630
1631 static int acm_pre_reset(struct usb_interface *intf)
1632 {
1633 struct acm *acm = usb_get_intfdata(intf);
1634
1635 clear_bit(EVENT_RX_STALL, &acm->flags);
1636 acm->nb_index = 0; /* pending control transfers are lost */
1637
1638 return 0;
1639 }
1640
1641 #define NOKIA_PCSUITE_ACM_INFO(x) \
1642 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1643 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1644 USB_CDC_ACM_PROTO_VENDOR)
1645
1646 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1647 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1648 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1649 USB_CDC_ACM_PROTO_VENDOR)
1650
1651 /*
1652 * USB driver structure.
1653 */
1654
1655 static const struct usb_device_id acm_ids[] = {
1656 /* quirky and broken devices */
1657 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1658 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1659 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1660 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1661 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1662 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1663 },
1664 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1665 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1666 },
1667 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */
1668 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
1669 },
1670 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1671 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1672 },
1673 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1674 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1675 },
1676 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1677 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1678 },
1679 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1680 .driver_info = SINGLE_RX_URB,
1681 },
1682 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1683 .driver_info = SINGLE_RX_URB, /* firmware bug */
1684 },
1685 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1686 .driver_info = SINGLE_RX_URB, /* firmware bug */
1687 },
1688 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1689 .driver_info = SINGLE_RX_URB,
1690 },
1691 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
1692 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1693 },
1694 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1695 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1696 },
1697 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1698 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1699 },
1700 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1701 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1702 },
1703 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1704 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1705 },
1706 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1707 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1708 },
1709 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
1710 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1711 },
1712 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1713 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1714 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1715 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1716 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1717 },
1718 /* Motorola H24 HSPA module: */
1719 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1720 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1721 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1722 },
1723 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1724 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1725 },
1726 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1727 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1728 },
1729 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1730 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1731 },
1732 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1733 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1734 },
1735 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1736 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1737 },
1738 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1739 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1740 },
1741
1742 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1743 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1744 data interface instead of
1745 communications interface.
1746 Maybe we should define a new
1747 quirk for this. */
1748 },
1749 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1750 .driver_info = NO_UNION_NORMAL,
1751 },
1752 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1753 .driver_info = NO_UNION_NORMAL,
1754 },
1755 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1756 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1757 },
1758 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1759 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1760 },
1761 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1762 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1763 },
1764 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1765 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1766 },
1767 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
1768 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1769 },
1770
1771 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1772 .driver_info = CLEAR_HALT_CONDITIONS,
1773 },
1774
1775 /* Nokia S60 phones expose two ACM channels. The first is
1776 * a modem and is picked up by the standard AT-command
1777 * information below. The second is 'vendor-specific' but
1778 * is treated as a serial device at the S60 end, so we want
1779 * to expose it on Linux too. */
1780 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1782 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1787 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1792 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1795 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1798 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1800 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1801 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1802 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1803 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1805 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1809 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1810 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1811 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1812 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1813 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1816 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1822 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1827 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1830 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1831 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1832 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1833 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1834 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1836 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1837 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1838
1839 /* Support for Owen devices */
1840 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1841
1842 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1843
1844 /* Support for Droids MuIn LCD */
1845 { USB_DEVICE(0x04d8, 0x000b),
1846 .driver_info = NO_DATA_INTERFACE,
1847 },
1848
1849 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1850 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1851 .driver_info = IGNORE_DEVICE,
1852 },
1853 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1854 .driver_info = IGNORE_DEVICE,
1855 },
1856 #endif
1857
1858 /*Samsung phone in firmware update mode */
1859 { USB_DEVICE(0x04e8, 0x685d),
1860 .driver_info = IGNORE_DEVICE,
1861 },
1862
1863 /* Exclude Infineon Flash Loader utility */
1864 { USB_DEVICE(0x058b, 0x0041),
1865 .driver_info = IGNORE_DEVICE,
1866 },
1867
1868 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
1869 .driver_info = SEND_ZERO_PACKET,
1870 },
1871 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
1872 .driver_info = SEND_ZERO_PACKET,
1873 },
1874
1875 /* control interfaces without any protocol set */
1876 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1877 USB_CDC_PROTO_NONE) },
1878
1879 /* control interfaces with various AT-command sets */
1880 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1881 USB_CDC_ACM_PROTO_AT_V25TER) },
1882 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1883 USB_CDC_ACM_PROTO_AT_PCCA101) },
1884 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1885 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1886 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1887 USB_CDC_ACM_PROTO_AT_GSM) },
1888 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1889 USB_CDC_ACM_PROTO_AT_3G) },
1890 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1891 USB_CDC_ACM_PROTO_AT_CDMA) },
1892
1893 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1894 .driver_info = SEND_ZERO_PACKET,
1895 },
1896
1897 { }
1898 };
1899
1900 MODULE_DEVICE_TABLE(usb, acm_ids);
1901
1902 static struct usb_driver acm_driver = {
1903 .name = "cdc_acm",
1904 .probe = acm_probe,
1905 .disconnect = acm_disconnect,
1906 #ifdef CONFIG_PM
1907 .suspend = acm_suspend,
1908 .resume = acm_resume,
1909 .reset_resume = acm_reset_resume,
1910 #endif
1911 .pre_reset = acm_pre_reset,
1912 .id_table = acm_ids,
1913 #ifdef CONFIG_PM
1914 .supports_autosuspend = 1,
1915 #endif
1916 .disable_hub_initiated_lpm = 1,
1917 };
1918
1919 /*
1920 * TTY driver structures.
1921 */
1922
1923 static const struct tty_operations acm_ops = {
1924 .install = acm_tty_install,
1925 .open = acm_tty_open,
1926 .close = acm_tty_close,
1927 .cleanup = acm_tty_cleanup,
1928 .hangup = acm_tty_hangup,
1929 .write = acm_tty_write,
1930 .write_room = acm_tty_write_room,
1931 .ioctl = acm_tty_ioctl,
1932 .throttle = acm_tty_throttle,
1933 .unthrottle = acm_tty_unthrottle,
1934 .chars_in_buffer = acm_tty_chars_in_buffer,
1935 .break_ctl = acm_tty_break_ctl,
1936 .set_termios = acm_tty_set_termios,
1937 .tiocmget = acm_tty_tiocmget,
1938 .tiocmset = acm_tty_tiocmset,
1939 .get_serial = get_serial_info,
1940 .set_serial = set_serial_info,
1941 .get_icount = acm_tty_get_icount,
1942 };
1943
1944 /*
1945 * Init / exit.
1946 */
1947
1948 static int __init acm_init(void)
1949 {
1950 int retval;
1951 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1952 if (!acm_tty_driver)
1953 return -ENOMEM;
1954 acm_tty_driver->driver_name = "acm",
1955 acm_tty_driver->name = "ttyACM",
1956 acm_tty_driver->major = ACM_TTY_MAJOR,
1957 acm_tty_driver->minor_start = 0,
1958 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1959 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1960 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1961 acm_tty_driver->init_termios = tty_std_termios;
1962 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1963 HUPCL | CLOCAL;
1964 tty_set_operations(acm_tty_driver, &acm_ops);
1965
1966 retval = tty_register_driver(acm_tty_driver);
1967 if (retval) {
1968 put_tty_driver(acm_tty_driver);
1969 return retval;
1970 }
1971
1972 retval = usb_register(&acm_driver);
1973 if (retval) {
1974 tty_unregister_driver(acm_tty_driver);
1975 put_tty_driver(acm_tty_driver);
1976 return retval;
1977 }
1978
1979 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1980
1981 return 0;
1982 }
1983
1984 static void __exit acm_exit(void)
1985 {
1986 usb_deregister(&acm_driver);
1987 tty_unregister_driver(acm_tty_driver);
1988 put_tty_driver(acm_tty_driver);
1989 idr_destroy(&acm_minors);
1990 }
1991
1992 module_init(acm_init);
1993 module_exit(acm_exit);
1994
1995 MODULE_AUTHOR(DRIVER_AUTHOR);
1996 MODULE_DESCRIPTION(DRIVER_DESC);
1997 MODULE_LICENSE("GPL");
1998 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux with added FPC-III support