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ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC
[linux/fpc-iii.git] / drivers / usb / class / cdc-acm.c
blob10ba1b4f0dbfb6e0d0b1a12f6985bbd22152cefc
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 && retval != -ENODEV)
416 dev_err(&acm->control->dev,
417 "%s - usb_submit_urb failed: %d\n", __func__, retval);
418 else
419 dev_vdbg(&acm->control->dev,
420 "control resubmission terminated %d\n", retval);
421 }
422
423 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
424 {
425 int res;
426
427 if (!test_and_clear_bit(index, &acm->read_urbs_free))
428 return 0;
429
430 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
431 if (res) {
432 if (res != -EPERM && res != -ENODEV) {
433 dev_err(&acm->data->dev,
434 "urb %d failed submission with %d\n",
435 index, res);
436 } else {
437 dev_vdbg(&acm->data->dev, "intended failure %d\n", res);
438 }
439 set_bit(index, &acm->read_urbs_free);
440 return res;
441 } else {
442 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
443 }
444
445 return 0;
446 }
447
448 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
449 {
450 int res;
451 int i;
452
453 for (i = 0; i < acm->rx_buflimit; ++i) {
454 res = acm_submit_read_urb(acm, i, mem_flags);
455 if (res)
456 return res;
457 }
458
459 return 0;
460 }
461
462 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
463 {
464 if (!urb->actual_length)
465 return;
466
467 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
468 urb->actual_length);
469 tty_flip_buffer_push(&acm->port);
470 }
471
472 static void acm_read_bulk_callback(struct urb *urb)
473 {
474 struct acm_rb *rb = urb->context;
475 struct acm *acm = rb->instance;
476 unsigned long flags;
477 int status = urb->status;
478 bool stopped = false;
479 bool stalled = false;
480 bool cooldown = false;
481
482 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
483 rb->index, urb->actual_length, status);
484
485 if (!acm->dev) {
486 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
487 return;
488 }
489
490 switch (status) {
491 case 0:
492 usb_mark_last_busy(acm->dev);
493 acm_process_read_urb(acm, urb);
494 break;
495 case -EPIPE:
496 set_bit(EVENT_RX_STALL, &acm->flags);
497 stalled = true;
498 break;
499 case -ENOENT:
500 case -ECONNRESET:
501 case -ESHUTDOWN:
502 dev_dbg(&acm->data->dev,
503 "%s - urb shutting down with status: %d\n",
504 __func__, status);
505 stopped = true;
506 break;
507 case -EOVERFLOW:
508 case -EPROTO:
509 dev_dbg(&acm->data->dev,
510 "%s - cooling babbling device\n", __func__);
511 usb_mark_last_busy(acm->dev);
512 set_bit(rb->index, &acm->urbs_in_error_delay);
513 cooldown = true;
514 break;
515 default:
516 dev_dbg(&acm->data->dev,
517 "%s - nonzero urb status received: %d\n",
518 __func__, status);
519 break;
520 }
521
522 /*
523 * Make sure URB processing is done before marking as free to avoid
524 * racing with unthrottle() on another CPU. Matches the barriers
525 * implied by the test_and_clear_bit() in acm_submit_read_urb().
526 */
527 smp_mb__before_atomic();
528 set_bit(rb->index, &acm->read_urbs_free);
529 /*
530 * Make sure URB is marked as free before checking the throttled flag
531 * to avoid racing with unthrottle() on another CPU. Matches the
532 * smp_mb() in unthrottle().
533 */
534 smp_mb__after_atomic();
535
536 if (stopped || stalled || cooldown) {
537 if (stalled)
538 schedule_work(&acm->work);
539 else if (cooldown)
540 schedule_delayed_work(&acm->dwork, HZ / 2);
541 return;
542 }
543
544 /* throttle device if requested by tty */
545 spin_lock_irqsave(&acm->read_lock, flags);
546 acm->throttled = acm->throttle_req;
547 if (!acm->throttled) {
548 spin_unlock_irqrestore(&acm->read_lock, flags);
549 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
550 } else {
551 spin_unlock_irqrestore(&acm->read_lock, flags);
552 }
553 }
554
555 /* data interface wrote those outgoing bytes */
556 static void acm_write_bulk(struct urb *urb)
557 {
558 struct acm_wb *wb = urb->context;
559 struct acm *acm = wb->instance;
560 unsigned long flags;
561 int status = urb->status;
562
563 if (status || (urb->actual_length != urb->transfer_buffer_length))
564 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
565 urb->actual_length,
566 urb->transfer_buffer_length,
567 status);
568
569 spin_lock_irqsave(&acm->write_lock, flags);
570 acm_write_done(acm, wb);
571 spin_unlock_irqrestore(&acm->write_lock, flags);
572 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
573 schedule_work(&acm->work);
574 }
575
576 static void acm_softint(struct work_struct *work)
577 {
578 int i;
579 struct acm *acm = container_of(work, struct acm, work);
580
581 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
582 smp_mb(); /* against acm_suspend() */
583 if (!acm->susp_count) {
584 for (i = 0; i < acm->rx_buflimit; i++)
585 usb_kill_urb(acm->read_urbs[i]);
586 usb_clear_halt(acm->dev, acm->in);
587 acm_submit_read_urbs(acm, GFP_KERNEL);
588 clear_bit(EVENT_RX_STALL, &acm->flags);
589 }
590 }
591
592 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) {
593 for (i = 0; i < ACM_NR; i++)
594 if (test_and_clear_bit(i, &acm->urbs_in_error_delay))
595 acm_submit_read_urb(acm, i, GFP_NOIO);
596 }
597
598 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
599 tty_port_tty_wakeup(&acm->port);
600 }
601
602 /*
603 * TTY handlers
604 */
605
606 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
607 {
608 struct acm *acm;
609 int retval;
610
611 acm = acm_get_by_minor(tty->index);
612 if (!acm)
613 return -ENODEV;
614
615 retval = tty_standard_install(driver, tty);
616 if (retval)
617 goto error_init_termios;
618
619 /*
620 * Suppress initial echoing for some devices which might send data
621 * immediately after acm driver has been installed.
622 */
623 if (acm->quirks & DISABLE_ECHO)
624 tty->termios.c_lflag &= ~ECHO;
625
626 tty->driver_data = acm;
627
628 return 0;
629
630 error_init_termios:
631 tty_port_put(&acm->port);
632 return retval;
633 }
634
635 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
636 {
637 struct acm *acm = tty->driver_data;
638
639 return tty_port_open(&acm->port, tty, filp);
640 }
641
642 static void acm_port_dtr_rts(struct tty_port *port, int raise)
643 {
644 struct acm *acm = container_of(port, struct acm, port);
645 int val;
646 int res;
647
648 if (raise)
649 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
650 else
651 val = 0;
652
653 /* FIXME: add missing ctrlout locking throughout driver */
654 acm->ctrlout = val;
655
656 res = acm_set_control(acm, val);
657 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
658 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
659 }
660
661 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
662 {
663 struct acm *acm = container_of(port, struct acm, port);
664 int retval = -ENODEV;
665 int i;
666
667 mutex_lock(&acm->mutex);
668 if (acm->disconnected)
669 goto disconnected;
670
671 retval = usb_autopm_get_interface(acm->control);
672 if (retval)
673 goto error_get_interface;
674
675 /*
676 * FIXME: Why do we need this? Allocating 64K of physically contiguous
677 * memory is really nasty...
678 */
679 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
680 acm->control->needs_remote_wakeup = 1;
681
682 acm->ctrlurb->dev = acm->dev;
683 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
684 if (retval) {
685 dev_err(&acm->control->dev,
686 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
687 goto error_submit_urb;
688 }
689
690 acm_tty_set_termios(tty, NULL);
691
692 /*
693 * Unthrottle device in case the TTY was closed while throttled.
694 */
695 spin_lock_irq(&acm->read_lock);
696 acm->throttled = 0;
697 acm->throttle_req = 0;
698 spin_unlock_irq(&acm->read_lock);
699
700 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
701 if (retval)
702 goto error_submit_read_urbs;
703
704 usb_autopm_put_interface(acm->control);
705
706 mutex_unlock(&acm->mutex);
707
708 return 0;
709
710 error_submit_read_urbs:
711 for (i = 0; i < acm->rx_buflimit; i++)
712 usb_kill_urb(acm->read_urbs[i]);
713 usb_kill_urb(acm->ctrlurb);
714 error_submit_urb:
715 usb_autopm_put_interface(acm->control);
716 error_get_interface:
717 disconnected:
718 mutex_unlock(&acm->mutex);
719
720 return usb_translate_errors(retval);
721 }
722
723 static void acm_port_destruct(struct tty_port *port)
724 {
725 struct acm *acm = container_of(port, struct acm, port);
726
727 acm_release_minor(acm);
728 usb_put_intf(acm->control);
729 kfree(acm->country_codes);
730 kfree(acm);
731 }
732
733 static void acm_port_shutdown(struct tty_port *port)
734 {
735 struct acm *acm = container_of(port, struct acm, port);
736 struct urb *urb;
737 struct acm_wb *wb;
738
739 /*
740 * Need to grab write_lock to prevent race with resume, but no need to
741 * hold it due to the tty-port initialised flag.
742 */
743 spin_lock_irq(&acm->write_lock);
744 spin_unlock_irq(&acm->write_lock);
745
746 usb_autopm_get_interface_no_resume(acm->control);
747 acm->control->needs_remote_wakeup = 0;
748 usb_autopm_put_interface(acm->control);
749
750 for (;;) {
751 urb = usb_get_from_anchor(&acm->delayed);
752 if (!urb)
753 break;
754 wb = urb->context;
755 wb->use = 0;
756 usb_autopm_put_interface_async(acm->control);
757 }
758
759 acm_kill_urbs(acm);
760 }
761
762 static void acm_tty_cleanup(struct tty_struct *tty)
763 {
764 struct acm *acm = tty->driver_data;
765
766 tty_port_put(&acm->port);
767 }
768
769 static void acm_tty_hangup(struct tty_struct *tty)
770 {
771 struct acm *acm = tty->driver_data;
772
773 tty_port_hangup(&acm->port);
774 }
775
776 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
777 {
778 struct acm *acm = tty->driver_data;
779
780 tty_port_close(&acm->port, tty, filp);
781 }
782
783 static int acm_tty_write(struct tty_struct *tty,
784 const unsigned char *buf, int count)
785 {
786 struct acm *acm = tty->driver_data;
787 int stat;
788 unsigned long flags;
789 int wbn;
790 struct acm_wb *wb;
791
792 if (!count)
793 return 0;
794
795 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
796
797 spin_lock_irqsave(&acm->write_lock, flags);
798 wbn = acm_wb_alloc(acm);
799 if (wbn < 0) {
800 spin_unlock_irqrestore(&acm->write_lock, flags);
801 return 0;
802 }
803 wb = &acm->wb[wbn];
804
805 if (!acm->dev) {
806 wb->use = 0;
807 spin_unlock_irqrestore(&acm->write_lock, flags);
808 return -ENODEV;
809 }
810
811 count = (count > acm->writesize) ? acm->writesize : count;
812 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
813 memcpy(wb->buf, buf, count);
814 wb->len = count;
815
816 stat = usb_autopm_get_interface_async(acm->control);
817 if (stat) {
818 wb->use = 0;
819 spin_unlock_irqrestore(&acm->write_lock, flags);
820 return stat;
821 }
822
823 if (acm->susp_count) {
824 usb_anchor_urb(wb->urb, &acm->delayed);
825 spin_unlock_irqrestore(&acm->write_lock, flags);
826 return count;
827 }
828
829 stat = acm_start_wb(acm, wb);
830 spin_unlock_irqrestore(&acm->write_lock, flags);
831
832 if (stat < 0)
833 return stat;
834 return count;
835 }
836
837 static int acm_tty_write_room(struct tty_struct *tty)
838 {
839 struct acm *acm = tty->driver_data;
840 /*
841 * Do not let the line discipline to know that we have a reserve,
842 * or it might get too enthusiastic.
843 */
844 return acm_wb_is_avail(acm) ? acm->writesize : 0;
845 }
846
847 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
848 {
849 struct acm *acm = tty->driver_data;
850 /*
851 * if the device was unplugged then any remaining characters fell out
852 * of the connector ;)
853 */
854 if (acm->disconnected)
855 return 0;
856 /*
857 * This is inaccurate (overcounts), but it works.
858 */
859 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
860 }
861
862 static void acm_tty_throttle(struct tty_struct *tty)
863 {
864 struct acm *acm = tty->driver_data;
865
866 spin_lock_irq(&acm->read_lock);
867 acm->throttle_req = 1;
868 spin_unlock_irq(&acm->read_lock);
869 }
870
871 static void acm_tty_unthrottle(struct tty_struct *tty)
872 {
873 struct acm *acm = tty->driver_data;
874 unsigned int was_throttled;
875
876 spin_lock_irq(&acm->read_lock);
877 was_throttled = acm->throttled;
878 acm->throttled = 0;
879 acm->throttle_req = 0;
880 spin_unlock_irq(&acm->read_lock);
881
882 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */
883 smp_mb();
884
885 if (was_throttled)
886 acm_submit_read_urbs(acm, GFP_KERNEL);
887 }
888
889 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
890 {
891 struct acm *acm = tty->driver_data;
892 int retval;
893
894 retval = acm_send_break(acm, state ? 0xffff : 0);
895 if (retval < 0)
896 dev_dbg(&acm->control->dev,
897 "%s - send break failed\n", __func__);
898 return retval;
899 }
900
901 static int acm_tty_tiocmget(struct tty_struct *tty)
902 {
903 struct acm *acm = tty->driver_data;
904
905 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
906 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
907 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
908 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
909 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
910 TIOCM_CTS;
911 }
912
913 static int acm_tty_tiocmset(struct tty_struct *tty,
914 unsigned int set, unsigned int clear)
915 {
916 struct acm *acm = tty->driver_data;
917 unsigned int newctrl;
918
919 newctrl = acm->ctrlout;
920 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
921 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
922 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
923 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
924
925 newctrl = (newctrl & ~clear) | set;
926
927 if (acm->ctrlout == newctrl)
928 return 0;
929 return acm_set_control(acm, acm->ctrlout = newctrl);
930 }
931
932 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
933 {
934 struct serial_struct tmp;
935
936 memset(&tmp, 0, sizeof(tmp));
937 tmp.xmit_fifo_size = acm->writesize;
938 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
939 tmp.close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
940 tmp.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 if (copy_to_user(info, &tmp, sizeof(tmp)))
945 return -EFAULT;
946 else
947 return 0;
948 }
949
950 static int set_serial_info(struct acm *acm,
951 struct serial_struct __user *newinfo)
952 {
953 struct serial_struct new_serial;
954 unsigned int closing_wait, close_delay;
955 unsigned int old_closing_wait, old_close_delay;
956 int retval = 0;
957
958 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
959 return -EFAULT;
960
961 close_delay = msecs_to_jiffies(new_serial.close_delay * 10);
962 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
963 ASYNC_CLOSING_WAIT_NONE :
964 msecs_to_jiffies(new_serial.closing_wait * 10);
965
966 /* we must redo the rounding here, so that the values match */
967 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10;
968 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
969 ASYNC_CLOSING_WAIT_NONE :
970 jiffies_to_msecs(acm->port.closing_wait) / 10;
971
972 mutex_lock(&acm->port.mutex);
973
974 if (!capable(CAP_SYS_ADMIN)) {
975 if ((new_serial.close_delay != old_close_delay) ||
976 (new_serial.closing_wait != old_closing_wait))
977 retval = -EPERM;
978 else
979 retval = -EOPNOTSUPP;
980 } else {
981 acm->port.close_delay = close_delay;
982 acm->port.closing_wait = closing_wait;
983 }
984
985 mutex_unlock(&acm->port.mutex);
986 return retval;
987 }
988
989 static int wait_serial_change(struct acm *acm, unsigned long arg)
990 {
991 int rv = 0;
992 DECLARE_WAITQUEUE(wait, current);
993 struct async_icount old, new;
994
995 do {
996 spin_lock_irq(&acm->read_lock);
997 old = acm->oldcount;
998 new = acm->iocount;
999 acm->oldcount = new;
1000 spin_unlock_irq(&acm->read_lock);
1001
1002 if ((arg & TIOCM_DSR) &&
1003 old.dsr != new.dsr)
1004 break;
1005 if ((arg & TIOCM_CD) &&
1006 old.dcd != new.dcd)
1007 break;
1008 if ((arg & TIOCM_RI) &&
1009 old.rng != new.rng)
1010 break;
1011
1012 add_wait_queue(&acm->wioctl, &wait);
1013 set_current_state(TASK_INTERRUPTIBLE);
1014 schedule();
1015 remove_wait_queue(&acm->wioctl, &wait);
1016 if (acm->disconnected) {
1017 if (arg & TIOCM_CD)
1018 break;
1019 else
1020 rv = -ENODEV;
1021 } else {
1022 if (signal_pending(current))
1023 rv = -ERESTARTSYS;
1024 }
1025 } while (!rv);
1026
1027
1028
1029 return rv;
1030 }
1031
1032 static int acm_tty_get_icount(struct tty_struct *tty,
1033 struct serial_icounter_struct *icount)
1034 {
1035 struct acm *acm = tty->driver_data;
1036
1037 icount->dsr = acm->iocount.dsr;
1038 icount->rng = acm->iocount.rng;
1039 icount->dcd = acm->iocount.dcd;
1040 icount->frame = acm->iocount.frame;
1041 icount->overrun = acm->iocount.overrun;
1042 icount->parity = acm->iocount.parity;
1043 icount->brk = acm->iocount.brk;
1044
1045 return 0;
1046 }
1047
1048 static int acm_tty_ioctl(struct tty_struct *tty,
1049 unsigned int cmd, unsigned long arg)
1050 {
1051 struct acm *acm = tty->driver_data;
1052 int rv = -ENOIOCTLCMD;
1053
1054 switch (cmd) {
1055 case TIOCGSERIAL: /* gets serial port data */
1056 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1057 break;
1058 case TIOCSSERIAL:
1059 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1060 break;
1061 case TIOCMIWAIT:
1062 rv = usb_autopm_get_interface(acm->control);
1063 if (rv < 0) {
1064 rv = -EIO;
1065 break;
1066 }
1067 rv = wait_serial_change(acm, arg);
1068 usb_autopm_put_interface(acm->control);
1069 break;
1070 }
1071
1072 return rv;
1073 }
1074
1075 static void acm_tty_set_termios(struct tty_struct *tty,
1076 struct ktermios *termios_old)
1077 {
1078 struct acm *acm = tty->driver_data;
1079 struct ktermios *termios = &tty->termios;
1080 struct usb_cdc_line_coding newline;
1081 int newctrl = acm->ctrlout;
1082
1083 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1084 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1085 newline.bParityType = termios->c_cflag & PARENB ?
1086 (termios->c_cflag & PARODD ? 1 : 2) +
1087 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1088 switch (termios->c_cflag & CSIZE) {
1089 case CS5:
1090 newline.bDataBits = 5;
1091 break;
1092 case CS6:
1093 newline.bDataBits = 6;
1094 break;
1095 case CS7:
1096 newline.bDataBits = 7;
1097 break;
1098 case CS8:
1099 default:
1100 newline.bDataBits = 8;
1101 break;
1102 }
1103 /* FIXME: Needs to clear unsupported bits in the termios */
1104 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1105
1106 if (C_BAUD(tty) == B0) {
1107 newline.dwDTERate = acm->line.dwDTERate;
1108 newctrl &= ~ACM_CTRL_DTR;
1109 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1110 newctrl |= ACM_CTRL_DTR;
1111 }
1112
1113 if (newctrl != acm->ctrlout)
1114 acm_set_control(acm, acm->ctrlout = newctrl);
1115
1116 if (memcmp(&acm->line, &newline, sizeof newline)) {
1117 memcpy(&acm->line, &newline, sizeof newline);
1118 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1119 __func__,
1120 le32_to_cpu(newline.dwDTERate),
1121 newline.bCharFormat, newline.bParityType,
1122 newline.bDataBits);
1123 acm_set_line(acm, &acm->line);
1124 }
1125 }
1126
1127 static const struct tty_port_operations acm_port_ops = {
1128 .dtr_rts = acm_port_dtr_rts,
1129 .shutdown = acm_port_shutdown,
1130 .activate = acm_port_activate,
1131 .destruct = acm_port_destruct,
1132 };
1133
1134 /*
1135 * USB probe and disconnect routines.
1136 */
1137
1138 /* Little helpers: write/read buffers free */
1139 static void acm_write_buffers_free(struct acm *acm)
1140 {
1141 int i;
1142 struct acm_wb *wb;
1143
1144 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1145 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1146 }
1147
1148 static void acm_read_buffers_free(struct acm *acm)
1149 {
1150 int i;
1151
1152 for (i = 0; i < acm->rx_buflimit; i++)
1153 usb_free_coherent(acm->dev, acm->readsize,
1154 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1155 }
1156
1157 /* Little helper: write buffers allocate */
1158 static int acm_write_buffers_alloc(struct acm *acm)
1159 {
1160 int i;
1161 struct acm_wb *wb;
1162
1163 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1164 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1165 &wb->dmah);
1166 if (!wb->buf) {
1167 while (i != 0) {
1168 --i;
1169 --wb;
1170 usb_free_coherent(acm->dev, acm->writesize,
1171 wb->buf, wb->dmah);
1172 }
1173 return -ENOMEM;
1174 }
1175 }
1176 return 0;
1177 }
1178
1179 static int acm_probe(struct usb_interface *intf,
1180 const struct usb_device_id *id)
1181 {
1182 struct usb_cdc_union_desc *union_header = NULL;
1183 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1184 unsigned char *buffer = intf->altsetting->extra;
1185 int buflen = intf->altsetting->extralen;
1186 struct usb_interface *control_interface;
1187 struct usb_interface *data_interface;
1188 struct usb_endpoint_descriptor *epctrl = NULL;
1189 struct usb_endpoint_descriptor *epread = NULL;
1190 struct usb_endpoint_descriptor *epwrite = NULL;
1191 struct usb_device *usb_dev = interface_to_usbdev(intf);
1192 struct usb_cdc_parsed_header h;
1193 struct acm *acm;
1194 int minor;
1195 int ctrlsize, readsize;
1196 u8 *buf;
1197 int call_intf_num = -1;
1198 int data_intf_num = -1;
1199 unsigned long quirks;
1200 int num_rx_buf;
1201 int i;
1202 int combined_interfaces = 0;
1203 struct device *tty_dev;
1204 int rv = -ENOMEM;
1205 int res;
1206
1207 /* normal quirks */
1208 quirks = (unsigned long)id->driver_info;
1209
1210 if (quirks == IGNORE_DEVICE)
1211 return -ENODEV;
1212
1213 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1214
1215 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1216
1217 /* handle quirks deadly to normal probing*/
1218 if (quirks == NO_UNION_NORMAL) {
1219 data_interface = usb_ifnum_to_if(usb_dev, 1);
1220 control_interface = usb_ifnum_to_if(usb_dev, 0);
1221 /* we would crash */
1222 if (!data_interface || !control_interface)
1223 return -ENODEV;
1224 goto skip_normal_probe;
1225 }
1226
1227 /* normal probing*/
1228 if (!buffer) {
1229 dev_err(&intf->dev, "Weird descriptor references\n");
1230 return -EINVAL;
1231 }
1232
1233 if (!intf->cur_altsetting)
1234 return -EINVAL;
1235
1236 if (!buflen) {
1237 if (intf->cur_altsetting->endpoint &&
1238 intf->cur_altsetting->endpoint->extralen &&
1239 intf->cur_altsetting->endpoint->extra) {
1240 dev_dbg(&intf->dev,
1241 "Seeking extra descriptors on endpoint\n");
1242 buflen = intf->cur_altsetting->endpoint->extralen;
1243 buffer = intf->cur_altsetting->endpoint->extra;
1244 } else {
1245 dev_err(&intf->dev,
1246 "Zero length descriptor references\n");
1247 return -EINVAL;
1248 }
1249 }
1250
1251 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1252 union_header = h.usb_cdc_union_desc;
1253 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1254 if (cmgmd)
1255 call_intf_num = cmgmd->bDataInterface;
1256
1257 if (!union_header) {
1258 if (call_intf_num > 0) {
1259 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1260 /* quirks for Droids MuIn LCD */
1261 if (quirks & NO_DATA_INTERFACE) {
1262 data_interface = usb_ifnum_to_if(usb_dev, 0);
1263 } else {
1264 data_intf_num = call_intf_num;
1265 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1266 }
1267 control_interface = intf;
1268 } else {
1269 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1270 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1271 return -ENODEV;
1272 } else {
1273 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1274 combined_interfaces = 1;
1275 control_interface = data_interface = intf;
1276 goto look_for_collapsed_interface;
1277 }
1278 }
1279 } else {
1280 data_intf_num = union_header->bSlaveInterface0;
1281 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1282 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1283 }
1284
1285 if (!control_interface || !data_interface) {
1286 dev_dbg(&intf->dev, "no interfaces\n");
1287 return -ENODEV;
1288 }
1289 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1290 return -ENODEV;
1291
1292 if (data_intf_num != call_intf_num)
1293 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1294
1295 if (control_interface == data_interface) {
1296 /* some broken devices designed for windows work this way */
1297 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1298 combined_interfaces = 1;
1299 /* a popular other OS doesn't use it */
1300 quirks |= NO_CAP_LINE;
1301 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1302 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1303 return -EINVAL;
1304 }
1305 look_for_collapsed_interface:
1306 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1307 &epread, &epwrite, &epctrl, NULL);
1308 if (res)
1309 return res;
1310
1311 goto made_compressed_probe;
1312 }
1313
1314 skip_normal_probe:
1315
1316 /*workaround for switched interfaces */
1317 if (data_interface->cur_altsetting->desc.bInterfaceClass
1318 != CDC_DATA_INTERFACE_TYPE) {
1319 if (control_interface->cur_altsetting->desc.bInterfaceClass
1320 == CDC_DATA_INTERFACE_TYPE) {
1321 dev_dbg(&intf->dev,
1322 "Your device has switched interfaces.\n");
1323 swap(control_interface, data_interface);
1324 } else {
1325 return -EINVAL;
1326 }
1327 }
1328
1329 /* Accept probe requests only for the control interface */
1330 if (!combined_interfaces && intf != control_interface)
1331 return -ENODEV;
1332
1333 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1334 /* valid in this context */
1335 dev_dbg(&intf->dev, "The data interface isn't available\n");
1336 return -EBUSY;
1337 }
1338
1339
1340 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1341 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1342 return -EINVAL;
1343
1344 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1345 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1346 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1347
1348
1349 /* workaround for switched endpoints */
1350 if (!usb_endpoint_dir_in(epread)) {
1351 /* descriptors are swapped */
1352 dev_dbg(&intf->dev,
1353 "The data interface has switched endpoints\n");
1354 swap(epread, epwrite);
1355 }
1356 made_compressed_probe:
1357 dev_dbg(&intf->dev, "interfaces are valid\n");
1358
1359 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1360 if (acm == NULL)
1361 goto alloc_fail;
1362
1363 tty_port_init(&acm->port);
1364 acm->port.ops = &acm_port_ops;
1365
1366 ctrlsize = usb_endpoint_maxp(epctrl);
1367 readsize = usb_endpoint_maxp(epread) *
1368 (quirks == SINGLE_RX_URB ? 1 : 2);
1369 acm->combined_interfaces = combined_interfaces;
1370 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1371 acm->control = control_interface;
1372 acm->data = data_interface;
1373
1374 usb_get_intf(acm->control); /* undone in destruct() */
1375
1376 minor = acm_alloc_minor(acm);
1377 if (minor < 0)
1378 goto alloc_fail1;
1379
1380 acm->minor = minor;
1381 acm->dev = usb_dev;
1382 if (h.usb_cdc_acm_descriptor)
1383 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1384 if (quirks & NO_CAP_LINE)
1385 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1386 acm->ctrlsize = ctrlsize;
1387 acm->readsize = readsize;
1388 acm->rx_buflimit = num_rx_buf;
1389 INIT_WORK(&acm->work, acm_softint);
1390 INIT_DELAYED_WORK(&acm->dwork, acm_softint);
1391 init_waitqueue_head(&acm->wioctl);
1392 spin_lock_init(&acm->write_lock);
1393 spin_lock_init(&acm->read_lock);
1394 mutex_init(&acm->mutex);
1395 if (usb_endpoint_xfer_int(epread)) {
1396 acm->bInterval = epread->bInterval;
1397 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1398 } else {
1399 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1400 }
1401 if (usb_endpoint_xfer_int(epwrite))
1402 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1403 else
1404 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1405 init_usb_anchor(&acm->delayed);
1406 acm->quirks = quirks;
1407
1408 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1409 if (!buf)
1410 goto alloc_fail1;
1411 acm->ctrl_buffer = buf;
1412
1413 if (acm_write_buffers_alloc(acm) < 0)
1414 goto alloc_fail2;
1415
1416 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1417 if (!acm->ctrlurb)
1418 goto alloc_fail3;
1419
1420 for (i = 0; i < num_rx_buf; i++) {
1421 struct acm_rb *rb = &(acm->read_buffers[i]);
1422 struct urb *urb;
1423
1424 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1425 &rb->dma);
1426 if (!rb->base)
1427 goto alloc_fail4;
1428 rb->index = i;
1429 rb->instance = acm;
1430
1431 urb = usb_alloc_urb(0, GFP_KERNEL);
1432 if (!urb)
1433 goto alloc_fail4;
1434
1435 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1436 urb->transfer_dma = rb->dma;
1437 if (usb_endpoint_xfer_int(epread))
1438 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1439 acm->readsize,
1440 acm_read_bulk_callback, rb,
1441 acm->bInterval);
1442 else
1443 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1444 acm->readsize,
1445 acm_read_bulk_callback, rb);
1446
1447 acm->read_urbs[i] = urb;
1448 __set_bit(i, &acm->read_urbs_free);
1449 }
1450 for (i = 0; i < ACM_NW; i++) {
1451 struct acm_wb *snd = &(acm->wb[i]);
1452
1453 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1454 if (snd->urb == NULL)
1455 goto alloc_fail5;
1456
1457 if (usb_endpoint_xfer_int(epwrite))
1458 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1459 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1460 else
1461 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1462 NULL, acm->writesize, acm_write_bulk, snd);
1463 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1464 if (quirks & SEND_ZERO_PACKET)
1465 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1466 snd->instance = acm;
1467 }
1468
1469 usb_set_intfdata(intf, acm);
1470
1471 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1472 if (i < 0)
1473 goto alloc_fail5;
1474
1475 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1476 struct usb_cdc_country_functional_desc * cfd =
1477 h.usb_cdc_country_functional_desc;
1478
1479 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1480 if (!acm->country_codes)
1481 goto skip_countries;
1482 acm->country_code_size = cfd->bLength - 4;
1483 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1484 cfd->bLength - 4);
1485 acm->country_rel_date = cfd->iCountryCodeRelDate;
1486
1487 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1488 if (i < 0) {
1489 kfree(acm->country_codes);
1490 acm->country_codes = NULL;
1491 acm->country_code_size = 0;
1492 goto skip_countries;
1493 }
1494
1495 i = device_create_file(&intf->dev,
1496 &dev_attr_iCountryCodeRelDate);
1497 if (i < 0) {
1498 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1499 kfree(acm->country_codes);
1500 acm->country_codes = NULL;
1501 acm->country_code_size = 0;
1502 goto skip_countries;
1503 }
1504 }
1505
1506 skip_countries:
1507 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1508 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1509 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1510 /* works around buggy devices */
1511 epctrl->bInterval ? epctrl->bInterval : 16);
1512 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1513 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1514 acm->notification_buffer = NULL;
1515 acm->nb_index = 0;
1516 acm->nb_size = 0;
1517
1518 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1519
1520 acm->line.dwDTERate = cpu_to_le32(9600);
1521 acm->line.bDataBits = 8;
1522 acm_set_line(acm, &acm->line);
1523
1524 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1525 usb_set_intfdata(data_interface, acm);
1526
1527 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1528 &control_interface->dev);
1529 if (IS_ERR(tty_dev)) {
1530 rv = PTR_ERR(tty_dev);
1531 goto alloc_fail6;
1532 }
1533
1534 if (quirks & CLEAR_HALT_CONDITIONS) {
1535 usb_clear_halt(usb_dev, acm->in);
1536 usb_clear_halt(usb_dev, acm->out);
1537 }
1538
1539 return 0;
1540 alloc_fail6:
1541 if (acm->country_codes) {
1542 device_remove_file(&acm->control->dev,
1543 &dev_attr_wCountryCodes);
1544 device_remove_file(&acm->control->dev,
1545 &dev_attr_iCountryCodeRelDate);
1546 kfree(acm->country_codes);
1547 }
1548 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1549 alloc_fail5:
1550 usb_set_intfdata(intf, NULL);
1551 for (i = 0; i < ACM_NW; i++)
1552 usb_free_urb(acm->wb[i].urb);
1553 alloc_fail4:
1554 for (i = 0; i < num_rx_buf; i++)
1555 usb_free_urb(acm->read_urbs[i]);
1556 acm_read_buffers_free(acm);
1557 usb_free_urb(acm->ctrlurb);
1558 alloc_fail3:
1559 acm_write_buffers_free(acm);
1560 alloc_fail2:
1561 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1562 alloc_fail1:
1563 tty_port_put(&acm->port);
1564 alloc_fail:
1565 return rv;
1566 }
1567
1568 static void acm_disconnect(struct usb_interface *intf)
1569 {
1570 struct acm *acm = usb_get_intfdata(intf);
1571 struct tty_struct *tty;
1572 int i;
1573
1574 /* sibling interface is already cleaning up */
1575 if (!acm)
1576 return;
1577
1578 mutex_lock(&acm->mutex);
1579 acm->disconnected = true;
1580 if (acm->country_codes) {
1581 device_remove_file(&acm->control->dev,
1582 &dev_attr_wCountryCodes);
1583 device_remove_file(&acm->control->dev,
1584 &dev_attr_iCountryCodeRelDate);
1585 }
1586 wake_up_all(&acm->wioctl);
1587 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1588 usb_set_intfdata(acm->control, NULL);
1589 usb_set_intfdata(acm->data, NULL);
1590 mutex_unlock(&acm->mutex);
1591
1592 tty = tty_port_tty_get(&acm->port);
1593 if (tty) {
1594 tty_vhangup(tty);
1595 tty_kref_put(tty);
1596 }
1597
1598 acm_kill_urbs(acm);
1599 cancel_work_sync(&acm->work);
1600 cancel_delayed_work_sync(&acm->dwork);
1601
1602 tty_unregister_device(acm_tty_driver, acm->minor);
1603
1604 usb_free_urb(acm->ctrlurb);
1605 for (i = 0; i < ACM_NW; i++)
1606 usb_free_urb(acm->wb[i].urb);
1607 for (i = 0; i < acm->rx_buflimit; i++)
1608 usb_free_urb(acm->read_urbs[i]);
1609 acm_write_buffers_free(acm);
1610 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1611 acm_read_buffers_free(acm);
1612
1613 kfree(acm->notification_buffer);
1614
1615 if (!acm->combined_interfaces)
1616 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1617 acm->data : acm->control);
1618
1619 tty_port_put(&acm->port);
1620 }
1621
1622 #ifdef CONFIG_PM
1623 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1624 {
1625 struct acm *acm = usb_get_intfdata(intf);
1626 int cnt;
1627
1628 spin_lock_irq(&acm->write_lock);
1629 if (PMSG_IS_AUTO(message)) {
1630 if (acm->transmitting) {
1631 spin_unlock_irq(&acm->write_lock);
1632 return -EBUSY;
1633 }
1634 }
1635 cnt = acm->susp_count++;
1636 spin_unlock_irq(&acm->write_lock);
1637
1638 if (cnt)
1639 return 0;
1640
1641 acm_kill_urbs(acm);
1642 cancel_work_sync(&acm->work);
1643 cancel_delayed_work_sync(&acm->dwork);
1644 acm->urbs_in_error_delay = 0;
1645
1646 return 0;
1647 }
1648
1649 static int acm_resume(struct usb_interface *intf)
1650 {
1651 struct acm *acm = usb_get_intfdata(intf);
1652 struct urb *urb;
1653 int rv = 0;
1654
1655 spin_lock_irq(&acm->write_lock);
1656
1657 if (--acm->susp_count)
1658 goto out;
1659
1660 if (tty_port_initialized(&acm->port)) {
1661 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1662
1663 for (;;) {
1664 urb = usb_get_from_anchor(&acm->delayed);
1665 if (!urb)
1666 break;
1667
1668 acm_start_wb(acm, urb->context);
1669 }
1670
1671 /*
1672 * delayed error checking because we must
1673 * do the write path at all cost
1674 */
1675 if (rv < 0)
1676 goto out;
1677
1678 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1679 }
1680 out:
1681 spin_unlock_irq(&acm->write_lock);
1682
1683 return rv;
1684 }
1685
1686 static int acm_reset_resume(struct usb_interface *intf)
1687 {
1688 struct acm *acm = usb_get_intfdata(intf);
1689
1690 if (tty_port_initialized(&acm->port))
1691 tty_port_tty_hangup(&acm->port, false);
1692
1693 return acm_resume(intf);
1694 }
1695
1696 #endif /* CONFIG_PM */
1697
1698 static int acm_pre_reset(struct usb_interface *intf)
1699 {
1700 struct acm *acm = usb_get_intfdata(intf);
1701
1702 clear_bit(EVENT_RX_STALL, &acm->flags);
1703 acm->nb_index = 0; /* pending control transfers are lost */
1704
1705 return 0;
1706 }
1707
1708 #define NOKIA_PCSUITE_ACM_INFO(x) \
1709 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1710 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1711 USB_CDC_ACM_PROTO_VENDOR)
1712
1713 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1714 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1715 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1716 USB_CDC_ACM_PROTO_VENDOR)
1717
1718 /*
1719 * USB driver structure.
1720 */
1721
1722 static const struct usb_device_id acm_ids[] = {
1723 /* quirky and broken devices */
1724 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1725 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1726 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1727 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1728 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1729 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1730 },
1731 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1732 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1733 },
1734 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */
1735 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
1736 },
1737 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1739 },
1740 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1742 },
1743 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1745 },
1746 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1747 .driver_info = SINGLE_RX_URB,
1748 },
1749 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1750 .driver_info = SINGLE_RX_URB, /* firmware bug */
1751 },
1752 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1753 .driver_info = SINGLE_RX_URB, /* firmware bug */
1754 },
1755 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1756 .driver_info = SINGLE_RX_URB,
1757 },
1758 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
1759 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1760 },
1761 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1763 },
1764 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1766 },
1767 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1769 },
1770 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1772 },
1773 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1775 },
1776 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
1777 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1778 },
1779 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1780 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1781 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1782 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1783 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1784 },
1785 /* Motorola H24 HSPA module: */
1786 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1787 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1789 },
1790 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1792 },
1793 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1795 },
1796 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1798 },
1799 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1801 },
1802 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1804 },
1805 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1806 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1807 },
1808
1809 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1810 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1811 data interface instead of
1812 communications interface.
1813 Maybe we should define a new
1814 quirk for this. */
1815 },
1816 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1817 .driver_info = NO_UNION_NORMAL,
1818 },
1819 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1820 .driver_info = NO_UNION_NORMAL,
1821 },
1822 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1824 },
1825 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1826 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1827 },
1828 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1829 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1830 },
1831 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1832 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1833 },
1834 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
1835 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1836 },
1837
1838 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1839 .driver_info = CLEAR_HALT_CONDITIONS,
1840 },
1841
1842 /* Nokia S60 phones expose two ACM channels. The first is
1843 * a modem and is picked up by the standard AT-command
1844 * information below. The second is 'vendor-specific' but
1845 * is treated as a serial device at the S60 end, so we want
1846 * to expose it on Linux too. */
1847 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1849 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1851 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1853 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1855 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1856 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1857 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1858 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1859 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1860 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1861 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1862 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1863 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1864 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1865 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1866 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1867 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1868 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1869 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1870 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1871 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1872 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1873 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1874 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1875 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1876 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1877 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1878 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1879 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1880 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1881 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1882 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1883 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1884 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1885 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1886 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1887 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1888 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1889 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1890 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1891 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1892 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1893 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1894 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1895 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1896 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1897 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1898 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1899 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1900 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1901 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1902 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1903 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1904 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1905
1906 /* Support for Owen devices */
1907 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1908
1909 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1910
1911 /* Support for Droids MuIn LCD */
1912 { USB_DEVICE(0x04d8, 0x000b),
1913 .driver_info = NO_DATA_INTERFACE,
1914 },
1915
1916 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1917 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1918 .driver_info = IGNORE_DEVICE,
1919 },
1920 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1921 .driver_info = IGNORE_DEVICE,
1922 },
1923 #endif
1924
1925 /*Samsung phone in firmware update mode */
1926 { USB_DEVICE(0x04e8, 0x685d),
1927 .driver_info = IGNORE_DEVICE,
1928 },
1929
1930 /* Exclude Infineon Flash Loader utility */
1931 { USB_DEVICE(0x058b, 0x0041),
1932 .driver_info = IGNORE_DEVICE,
1933 },
1934
1935 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
1936 .driver_info = SEND_ZERO_PACKET,
1937 },
1938 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
1939 .driver_info = SEND_ZERO_PACKET,
1940 },
1941
1942 /* control interfaces without any protocol set */
1943 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1944 USB_CDC_PROTO_NONE) },
1945
1946 /* control interfaces with various AT-command sets */
1947 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1948 USB_CDC_ACM_PROTO_AT_V25TER) },
1949 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1950 USB_CDC_ACM_PROTO_AT_PCCA101) },
1951 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1952 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1953 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1954 USB_CDC_ACM_PROTO_AT_GSM) },
1955 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1956 USB_CDC_ACM_PROTO_AT_3G) },
1957 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1958 USB_CDC_ACM_PROTO_AT_CDMA) },
1959
1960 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1961 .driver_info = SEND_ZERO_PACKET,
1962 },
1963
1964 { }
1965 };
1966
1967 MODULE_DEVICE_TABLE(usb, acm_ids);
1968
1969 static struct usb_driver acm_driver = {
1970 .name = "cdc_acm",
1971 .probe = acm_probe,
1972 .disconnect = acm_disconnect,
1973 #ifdef CONFIG_PM
1974 .suspend = acm_suspend,
1975 .resume = acm_resume,
1976 .reset_resume = acm_reset_resume,
1977 #endif
1978 .pre_reset = acm_pre_reset,
1979 .id_table = acm_ids,
1980 #ifdef CONFIG_PM
1981 .supports_autosuspend = 1,
1982 #endif
1983 .disable_hub_initiated_lpm = 1,
1984 };
1985
1986 /*
1987 * TTY driver structures.
1988 */
1989
1990 static const struct tty_operations acm_ops = {
1991 .install = acm_tty_install,
1992 .open = acm_tty_open,
1993 .close = acm_tty_close,
1994 .cleanup = acm_tty_cleanup,
1995 .hangup = acm_tty_hangup,
1996 .write = acm_tty_write,
1997 .write_room = acm_tty_write_room,
1998 .ioctl = acm_tty_ioctl,
1999 .throttle = acm_tty_throttle,
2000 .unthrottle = acm_tty_unthrottle,
2001 .chars_in_buffer = acm_tty_chars_in_buffer,
2002 .break_ctl = acm_tty_break_ctl,
2003 .set_termios = acm_tty_set_termios,
2004 .tiocmget = acm_tty_tiocmget,
2005 .tiocmset = acm_tty_tiocmset,
2006 .get_icount = acm_tty_get_icount,
2007 };
2008
2009 /*
2010 * Init / exit.
2011 */
2012
2013 static int __init acm_init(void)
2014 {
2015 int retval;
2016 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2017 if (!acm_tty_driver)
2018 return -ENOMEM;
2019 acm_tty_driver->driver_name = "acm",
2020 acm_tty_driver->name = "ttyACM",
2021 acm_tty_driver->major = ACM_TTY_MAJOR,
2022 acm_tty_driver->minor_start = 0,
2023 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2024 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2025 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2026 acm_tty_driver->init_termios = tty_std_termios;
2027 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2028 HUPCL | CLOCAL;
2029 tty_set_operations(acm_tty_driver, &acm_ops);
2030
2031 retval = tty_register_driver(acm_tty_driver);
2032 if (retval) {
2033 put_tty_driver(acm_tty_driver);
2034 return retval;
2035 }
2036
2037 retval = usb_register(&acm_driver);
2038 if (retval) {
2039 tty_unregister_driver(acm_tty_driver);
2040 put_tty_driver(acm_tty_driver);
2041 return retval;
2042 }
2043
2044 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2045
2046 return 0;
2047 }
2048
2049 static void __exit acm_exit(void)
2050 {
2051 usb_deregister(&acm_driver);
2052 tty_unregister_driver(acm_tty_driver);
2053 put_tty_driver(acm_tty_driver);
2054 idr_destroy(&acm_minors);
2055 }
2056
2057 module_init(acm_init);
2058 module_exit(acm_exit);
2059
2060 MODULE_AUTHOR(DRIVER_AUTHOR);
2061 MODULE_DESCRIPTION(DRIVER_DESC);
2062 MODULE_LICENSE("GPL");
2063 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux with added FPC-III support