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perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
[linux/fpc-iii.git] / drivers / usb / class / cdc-acm.c
blob1b68fed464cb96456fcd566f409608bfda34b4f1
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 tty->driver_data = acm;
585
586 return 0;
587
588 error_init_termios:
589 tty_port_put(&acm->port);
590 return retval;
591 }
592
593 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
594 {
595 struct acm *acm = tty->driver_data;
596
597 return tty_port_open(&acm->port, tty, filp);
598 }
599
600 static void acm_port_dtr_rts(struct tty_port *port, int raise)
601 {
602 struct acm *acm = container_of(port, struct acm, port);
603 int val;
604 int res;
605
606 if (raise)
607 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
608 else
609 val = 0;
610
611 /* FIXME: add missing ctrlout locking throughout driver */
612 acm->ctrlout = val;
613
614 res = acm_set_control(acm, val);
615 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
616 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
617 }
618
619 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
620 {
621 struct acm *acm = container_of(port, struct acm, port);
622 int retval = -ENODEV;
623 int i;
624
625 mutex_lock(&acm->mutex);
626 if (acm->disconnected)
627 goto disconnected;
628
629 retval = usb_autopm_get_interface(acm->control);
630 if (retval)
631 goto error_get_interface;
632
633 /*
634 * FIXME: Why do we need this? Allocating 64K of physically contiguous
635 * memory is really nasty...
636 */
637 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
638 acm->control->needs_remote_wakeup = 1;
639
640 acm->ctrlurb->dev = acm->dev;
641 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
642 if (retval) {
643 dev_err(&acm->control->dev,
644 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
645 goto error_submit_urb;
646 }
647
648 acm_tty_set_termios(tty, NULL);
649
650 /*
651 * Unthrottle device in case the TTY was closed while throttled.
652 */
653 spin_lock_irq(&acm->read_lock);
654 acm->throttled = 0;
655 acm->throttle_req = 0;
656 spin_unlock_irq(&acm->read_lock);
657
658 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
659 if (retval)
660 goto error_submit_read_urbs;
661
662 usb_autopm_put_interface(acm->control);
663
664 mutex_unlock(&acm->mutex);
665
666 return 0;
667
668 error_submit_read_urbs:
669 for (i = 0; i < acm->rx_buflimit; i++)
670 usb_kill_urb(acm->read_urbs[i]);
671 usb_kill_urb(acm->ctrlurb);
672 error_submit_urb:
673 usb_autopm_put_interface(acm->control);
674 error_get_interface:
675 disconnected:
676 mutex_unlock(&acm->mutex);
677
678 return usb_translate_errors(retval);
679 }
680
681 static void acm_port_destruct(struct tty_port *port)
682 {
683 struct acm *acm = container_of(port, struct acm, port);
684
685 acm_release_minor(acm);
686 usb_put_intf(acm->control);
687 kfree(acm->country_codes);
688 kfree(acm);
689 }
690
691 static void acm_port_shutdown(struct tty_port *port)
692 {
693 struct acm *acm = container_of(port, struct acm, port);
694 struct urb *urb;
695 struct acm_wb *wb;
696
697 /*
698 * Need to grab write_lock to prevent race with resume, but no need to
699 * hold it due to the tty-port initialised flag.
700 */
701 spin_lock_irq(&acm->write_lock);
702 spin_unlock_irq(&acm->write_lock);
703
704 usb_autopm_get_interface_no_resume(acm->control);
705 acm->control->needs_remote_wakeup = 0;
706 usb_autopm_put_interface(acm->control);
707
708 for (;;) {
709 urb = usb_get_from_anchor(&acm->delayed);
710 if (!urb)
711 break;
712 wb = urb->context;
713 wb->use = 0;
714 usb_autopm_put_interface_async(acm->control);
715 }
716
717 acm_kill_urbs(acm);
718 }
719
720 static void acm_tty_cleanup(struct tty_struct *tty)
721 {
722 struct acm *acm = tty->driver_data;
723
724 tty_port_put(&acm->port);
725 }
726
727 static void acm_tty_hangup(struct tty_struct *tty)
728 {
729 struct acm *acm = tty->driver_data;
730
731 tty_port_hangup(&acm->port);
732 }
733
734 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
735 {
736 struct acm *acm = tty->driver_data;
737
738 tty_port_close(&acm->port, tty, filp);
739 }
740
741 static int acm_tty_write(struct tty_struct *tty,
742 const unsigned char *buf, int count)
743 {
744 struct acm *acm = tty->driver_data;
745 int stat;
746 unsigned long flags;
747 int wbn;
748 struct acm_wb *wb;
749
750 if (!count)
751 return 0;
752
753 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
754
755 spin_lock_irqsave(&acm->write_lock, flags);
756 wbn = acm_wb_alloc(acm);
757 if (wbn < 0) {
758 spin_unlock_irqrestore(&acm->write_lock, flags);
759 return 0;
760 }
761 wb = &acm->wb[wbn];
762
763 if (!acm->dev) {
764 wb->use = 0;
765 spin_unlock_irqrestore(&acm->write_lock, flags);
766 return -ENODEV;
767 }
768
769 count = (count > acm->writesize) ? acm->writesize : count;
770 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
771 memcpy(wb->buf, buf, count);
772 wb->len = count;
773
774 stat = usb_autopm_get_interface_async(acm->control);
775 if (stat) {
776 wb->use = 0;
777 spin_unlock_irqrestore(&acm->write_lock, flags);
778 return stat;
779 }
780
781 if (acm->susp_count) {
782 usb_anchor_urb(wb->urb, &acm->delayed);
783 spin_unlock_irqrestore(&acm->write_lock, flags);
784 return count;
785 }
786
787 stat = acm_start_wb(acm, wb);
788 spin_unlock_irqrestore(&acm->write_lock, flags);
789
790 if (stat < 0)
791 return stat;
792 return count;
793 }
794
795 static int acm_tty_write_room(struct tty_struct *tty)
796 {
797 struct acm *acm = tty->driver_data;
798 /*
799 * Do not let the line discipline to know that we have a reserve,
800 * or it might get too enthusiastic.
801 */
802 return acm_wb_is_avail(acm) ? acm->writesize : 0;
803 }
804
805 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
806 {
807 struct acm *acm = tty->driver_data;
808 /*
809 * if the device was unplugged then any remaining characters fell out
810 * of the connector ;)
811 */
812 if (acm->disconnected)
813 return 0;
814 /*
815 * This is inaccurate (overcounts), but it works.
816 */
817 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
818 }
819
820 static void acm_tty_throttle(struct tty_struct *tty)
821 {
822 struct acm *acm = tty->driver_data;
823
824 spin_lock_irq(&acm->read_lock);
825 acm->throttle_req = 1;
826 spin_unlock_irq(&acm->read_lock);
827 }
828
829 static void acm_tty_unthrottle(struct tty_struct *tty)
830 {
831 struct acm *acm = tty->driver_data;
832 unsigned int was_throttled;
833
834 spin_lock_irq(&acm->read_lock);
835 was_throttled = acm->throttled;
836 acm->throttled = 0;
837 acm->throttle_req = 0;
838 spin_unlock_irq(&acm->read_lock);
839
840 if (was_throttled)
841 acm_submit_read_urbs(acm, GFP_KERNEL);
842 }
843
844 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
845 {
846 struct acm *acm = tty->driver_data;
847 int retval;
848
849 retval = acm_send_break(acm, state ? 0xffff : 0);
850 if (retval < 0)
851 dev_dbg(&acm->control->dev,
852 "%s - send break failed\n", __func__);
853 return retval;
854 }
855
856 static int acm_tty_tiocmget(struct tty_struct *tty)
857 {
858 struct acm *acm = tty->driver_data;
859
860 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
861 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
862 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
863 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
864 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
865 TIOCM_CTS;
866 }
867
868 static int acm_tty_tiocmset(struct tty_struct *tty,
869 unsigned int set, unsigned int clear)
870 {
871 struct acm *acm = tty->driver_data;
872 unsigned int newctrl;
873
874 newctrl = acm->ctrlout;
875 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
876 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
877 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
878 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
879
880 newctrl = (newctrl & ~clear) | set;
881
882 if (acm->ctrlout == newctrl)
883 return 0;
884 return acm_set_control(acm, acm->ctrlout = newctrl);
885 }
886
887 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)
888 {
889 struct acm *acm = tty->driver_data;
890
891 ss->xmit_fifo_size = acm->writesize;
892 ss->baud_base = le32_to_cpu(acm->line.dwDTERate);
893 ss->close_delay = acm->port.close_delay / 10;
894 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
895 ASYNC_CLOSING_WAIT_NONE :
896 acm->port.closing_wait / 10;
897 return 0;
898 }
899
900 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
901 {
902 struct acm *acm = tty->driver_data;
903 unsigned int closing_wait, close_delay;
904 int retval = 0;
905
906 close_delay = ss->close_delay * 10;
907 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
908 ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
909
910 mutex_lock(&acm->port.mutex);
911
912 if (!capable(CAP_SYS_ADMIN)) {
913 if ((close_delay != acm->port.close_delay) ||
914 (closing_wait != acm->port.closing_wait))
915 retval = -EPERM;
916 else
917 retval = -EOPNOTSUPP;
918 } else {
919 acm->port.close_delay = close_delay;
920 acm->port.closing_wait = closing_wait;
921 }
922
923 mutex_unlock(&acm->port.mutex);
924 return retval;
925 }
926
927 static int wait_serial_change(struct acm *acm, unsigned long arg)
928 {
929 int rv = 0;
930 DECLARE_WAITQUEUE(wait, current);
931 struct async_icount old, new;
932
933 do {
934 spin_lock_irq(&acm->read_lock);
935 old = acm->oldcount;
936 new = acm->iocount;
937 acm->oldcount = new;
938 spin_unlock_irq(&acm->read_lock);
939
940 if ((arg & TIOCM_DSR) &&
941 old.dsr != new.dsr)
942 break;
943 if ((arg & TIOCM_CD) &&
944 old.dcd != new.dcd)
945 break;
946 if ((arg & TIOCM_RI) &&
947 old.rng != new.rng)
948 break;
949
950 add_wait_queue(&acm->wioctl, &wait);
951 set_current_state(TASK_INTERRUPTIBLE);
952 schedule();
953 remove_wait_queue(&acm->wioctl, &wait);
954 if (acm->disconnected) {
955 if (arg & TIOCM_CD)
956 break;
957 else
958 rv = -ENODEV;
959 } else {
960 if (signal_pending(current))
961 rv = -ERESTARTSYS;
962 }
963 } while (!rv);
964
965
966
967 return rv;
968 }
969
970 static int acm_tty_get_icount(struct tty_struct *tty,
971 struct serial_icounter_struct *icount)
972 {
973 struct acm *acm = tty->driver_data;
974
975 icount->dsr = acm->iocount.dsr;
976 icount->rng = acm->iocount.rng;
977 icount->dcd = acm->iocount.dcd;
978 icount->frame = acm->iocount.frame;
979 icount->overrun = acm->iocount.overrun;
980 icount->parity = acm->iocount.parity;
981 icount->brk = acm->iocount.brk;
982
983 return 0;
984 }
985
986 static int acm_tty_ioctl(struct tty_struct *tty,
987 unsigned int cmd, unsigned long arg)
988 {
989 struct acm *acm = tty->driver_data;
990 int rv = -ENOIOCTLCMD;
991
992 switch (cmd) {
993 case TIOCMIWAIT:
994 rv = usb_autopm_get_interface(acm->control);
995 if (rv < 0) {
996 rv = -EIO;
997 break;
998 }
999 rv = wait_serial_change(acm, arg);
1000 usb_autopm_put_interface(acm->control);
1001 break;
1002 }
1003
1004 return rv;
1005 }
1006
1007 static void acm_tty_set_termios(struct tty_struct *tty,
1008 struct ktermios *termios_old)
1009 {
1010 struct acm *acm = tty->driver_data;
1011 struct ktermios *termios = &tty->termios;
1012 struct usb_cdc_line_coding newline;
1013 int newctrl = acm->ctrlout;
1014
1015 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1016 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1017 newline.bParityType = termios->c_cflag & PARENB ?
1018 (termios->c_cflag & PARODD ? 1 : 2) +
1019 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1020 switch (termios->c_cflag & CSIZE) {
1021 case CS5:
1022 newline.bDataBits = 5;
1023 break;
1024 case CS6:
1025 newline.bDataBits = 6;
1026 break;
1027 case CS7:
1028 newline.bDataBits = 7;
1029 break;
1030 case CS8:
1031 default:
1032 newline.bDataBits = 8;
1033 break;
1034 }
1035 /* FIXME: Needs to clear unsupported bits in the termios */
1036 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1037
1038 if (C_BAUD(tty) == B0) {
1039 newline.dwDTERate = acm->line.dwDTERate;
1040 newctrl &= ~ACM_CTRL_DTR;
1041 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1042 newctrl |= ACM_CTRL_DTR;
1043 }
1044
1045 if (newctrl != acm->ctrlout)
1046 acm_set_control(acm, acm->ctrlout = newctrl);
1047
1048 if (memcmp(&acm->line, &newline, sizeof newline)) {
1049 memcpy(&acm->line, &newline, sizeof newline);
1050 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1051 __func__,
1052 le32_to_cpu(newline.dwDTERate),
1053 newline.bCharFormat, newline.bParityType,
1054 newline.bDataBits);
1055 acm_set_line(acm, &acm->line);
1056 }
1057 }
1058
1059 static const struct tty_port_operations acm_port_ops = {
1060 .dtr_rts = acm_port_dtr_rts,
1061 .shutdown = acm_port_shutdown,
1062 .activate = acm_port_activate,
1063 .destruct = acm_port_destruct,
1064 };
1065
1066 /*
1067 * USB probe and disconnect routines.
1068 */
1069
1070 /* Little helpers: write/read buffers free */
1071 static void acm_write_buffers_free(struct acm *acm)
1072 {
1073 int i;
1074 struct acm_wb *wb;
1075
1076 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1077 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1078 }
1079
1080 static void acm_read_buffers_free(struct acm *acm)
1081 {
1082 int i;
1083
1084 for (i = 0; i < acm->rx_buflimit; i++)
1085 usb_free_coherent(acm->dev, acm->readsize,
1086 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1087 }
1088
1089 /* Little helper: write buffers allocate */
1090 static int acm_write_buffers_alloc(struct acm *acm)
1091 {
1092 int i;
1093 struct acm_wb *wb;
1094
1095 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1096 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1097 &wb->dmah);
1098 if (!wb->buf) {
1099 while (i != 0) {
1100 --i;
1101 --wb;
1102 usb_free_coherent(acm->dev, acm->writesize,
1103 wb->buf, wb->dmah);
1104 }
1105 return -ENOMEM;
1106 }
1107 }
1108 return 0;
1109 }
1110
1111 static int acm_probe(struct usb_interface *intf,
1112 const struct usb_device_id *id)
1113 {
1114 struct usb_cdc_union_desc *union_header = NULL;
1115 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1116 unsigned char *buffer = intf->altsetting->extra;
1117 int buflen = intf->altsetting->extralen;
1118 struct usb_interface *control_interface;
1119 struct usb_interface *data_interface;
1120 struct usb_endpoint_descriptor *epctrl = NULL;
1121 struct usb_endpoint_descriptor *epread = NULL;
1122 struct usb_endpoint_descriptor *epwrite = NULL;
1123 struct usb_device *usb_dev = interface_to_usbdev(intf);
1124 struct usb_cdc_parsed_header h;
1125 struct acm *acm;
1126 int minor;
1127 int ctrlsize, readsize;
1128 u8 *buf;
1129 int call_intf_num = -1;
1130 int data_intf_num = -1;
1131 unsigned long quirks;
1132 int num_rx_buf;
1133 int i;
1134 int combined_interfaces = 0;
1135 struct device *tty_dev;
1136 int rv = -ENOMEM;
1137 int res;
1138
1139 /* normal quirks */
1140 quirks = (unsigned long)id->driver_info;
1141
1142 if (quirks == IGNORE_DEVICE)
1143 return -ENODEV;
1144
1145 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1146
1147 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1148
1149 /* handle quirks deadly to normal probing*/
1150 if (quirks == NO_UNION_NORMAL) {
1151 data_interface = usb_ifnum_to_if(usb_dev, 1);
1152 control_interface = usb_ifnum_to_if(usb_dev, 0);
1153 /* we would crash */
1154 if (!data_interface || !control_interface)
1155 return -ENODEV;
1156 goto skip_normal_probe;
1157 }
1158
1159 /* normal probing*/
1160 if (!buffer) {
1161 dev_err(&intf->dev, "Weird descriptor references\n");
1162 return -EINVAL;
1163 }
1164
1165 if (!intf->cur_altsetting)
1166 return -EINVAL;
1167
1168 if (!buflen) {
1169 if (intf->cur_altsetting->endpoint &&
1170 intf->cur_altsetting->endpoint->extralen &&
1171 intf->cur_altsetting->endpoint->extra) {
1172 dev_dbg(&intf->dev,
1173 "Seeking extra descriptors on endpoint\n");
1174 buflen = intf->cur_altsetting->endpoint->extralen;
1175 buffer = intf->cur_altsetting->endpoint->extra;
1176 } else {
1177 dev_err(&intf->dev,
1178 "Zero length descriptor references\n");
1179 return -EINVAL;
1180 }
1181 }
1182
1183 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1184 union_header = h.usb_cdc_union_desc;
1185 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1186 if (cmgmd)
1187 call_intf_num = cmgmd->bDataInterface;
1188
1189 if (!union_header) {
1190 if (call_intf_num > 0) {
1191 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1192 /* quirks for Droids MuIn LCD */
1193 if (quirks & NO_DATA_INTERFACE) {
1194 data_interface = usb_ifnum_to_if(usb_dev, 0);
1195 } else {
1196 data_intf_num = call_intf_num;
1197 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1198 }
1199 control_interface = intf;
1200 } else {
1201 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1202 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1203 return -ENODEV;
1204 } else {
1205 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1206 combined_interfaces = 1;
1207 control_interface = data_interface = intf;
1208 goto look_for_collapsed_interface;
1209 }
1210 }
1211 } else {
1212 data_intf_num = union_header->bSlaveInterface0;
1213 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1214 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1215 }
1216
1217 if (!control_interface || !data_interface) {
1218 dev_dbg(&intf->dev, "no interfaces\n");
1219 return -ENODEV;
1220 }
1221 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1222 return -ENODEV;
1223
1224 if (data_intf_num != call_intf_num)
1225 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1226
1227 if (control_interface == data_interface) {
1228 /* some broken devices designed for windows work this way */
1229 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1230 combined_interfaces = 1;
1231 /* a popular other OS doesn't use it */
1232 quirks |= NO_CAP_LINE;
1233 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1234 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1235 return -EINVAL;
1236 }
1237 look_for_collapsed_interface:
1238 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1239 &epread, &epwrite, &epctrl, NULL);
1240 if (res)
1241 return res;
1242
1243 goto made_compressed_probe;
1244 }
1245
1246 skip_normal_probe:
1247
1248 /*workaround for switched interfaces */
1249 if (data_interface->cur_altsetting->desc.bInterfaceClass
1250 != CDC_DATA_INTERFACE_TYPE) {
1251 if (control_interface->cur_altsetting->desc.bInterfaceClass
1252 == CDC_DATA_INTERFACE_TYPE) {
1253 dev_dbg(&intf->dev,
1254 "Your device has switched interfaces.\n");
1255 swap(control_interface, data_interface);
1256 } else {
1257 return -EINVAL;
1258 }
1259 }
1260
1261 /* Accept probe requests only for the control interface */
1262 if (!combined_interfaces && intf != control_interface)
1263 return -ENODEV;
1264
1265 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1266 /* valid in this context */
1267 dev_dbg(&intf->dev, "The data interface isn't available\n");
1268 return -EBUSY;
1269 }
1270
1271
1272 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1273 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1274 return -EINVAL;
1275
1276 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1277 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1278 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1279
1280
1281 /* workaround for switched endpoints */
1282 if (!usb_endpoint_dir_in(epread)) {
1283 /* descriptors are swapped */
1284 dev_dbg(&intf->dev,
1285 "The data interface has switched endpoints\n");
1286 swap(epread, epwrite);
1287 }
1288 made_compressed_probe:
1289 dev_dbg(&intf->dev, "interfaces are valid\n");
1290
1291 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1292 if (acm == NULL)
1293 goto alloc_fail;
1294
1295 tty_port_init(&acm->port);
1296 acm->port.ops = &acm_port_ops;
1297
1298 minor = acm_alloc_minor(acm);
1299 if (minor < 0)
1300 goto alloc_fail1;
1301
1302 ctrlsize = usb_endpoint_maxp(epctrl);
1303 readsize = usb_endpoint_maxp(epread) *
1304 (quirks == SINGLE_RX_URB ? 1 : 2);
1305 acm->combined_interfaces = combined_interfaces;
1306 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1307 acm->control = control_interface;
1308 acm->data = data_interface;
1309 acm->minor = minor;
1310 acm->dev = usb_dev;
1311 if (h.usb_cdc_acm_descriptor)
1312 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1313 if (quirks & NO_CAP_LINE)
1314 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1315 acm->ctrlsize = ctrlsize;
1316 acm->readsize = readsize;
1317 acm->rx_buflimit = num_rx_buf;
1318 INIT_WORK(&acm->work, acm_softint);
1319 init_waitqueue_head(&acm->wioctl);
1320 spin_lock_init(&acm->write_lock);
1321 spin_lock_init(&acm->read_lock);
1322 mutex_init(&acm->mutex);
1323 if (usb_endpoint_xfer_int(epread)) {
1324 acm->bInterval = epread->bInterval;
1325 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1326 } else {
1327 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1328 }
1329 if (usb_endpoint_xfer_int(epwrite))
1330 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1331 else
1332 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1333 init_usb_anchor(&acm->delayed);
1334 acm->quirks = quirks;
1335
1336 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1337 if (!buf)
1338 goto alloc_fail1;
1339 acm->ctrl_buffer = buf;
1340
1341 if (acm_write_buffers_alloc(acm) < 0)
1342 goto alloc_fail2;
1343
1344 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1345 if (!acm->ctrlurb)
1346 goto alloc_fail3;
1347
1348 for (i = 0; i < num_rx_buf; i++) {
1349 struct acm_rb *rb = &(acm->read_buffers[i]);
1350 struct urb *urb;
1351
1352 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1353 &rb->dma);
1354 if (!rb->base)
1355 goto alloc_fail4;
1356 rb->index = i;
1357 rb->instance = acm;
1358
1359 urb = usb_alloc_urb(0, GFP_KERNEL);
1360 if (!urb)
1361 goto alloc_fail4;
1362
1363 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1364 urb->transfer_dma = rb->dma;
1365 if (usb_endpoint_xfer_int(epread))
1366 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1367 acm->readsize,
1368 acm_read_bulk_callback, rb,
1369 acm->bInterval);
1370 else
1371 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1372 acm->readsize,
1373 acm_read_bulk_callback, rb);
1374
1375 acm->read_urbs[i] = urb;
1376 __set_bit(i, &acm->read_urbs_free);
1377 }
1378 for (i = 0; i < ACM_NW; i++) {
1379 struct acm_wb *snd = &(acm->wb[i]);
1380
1381 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1382 if (snd->urb == NULL)
1383 goto alloc_fail5;
1384
1385 if (usb_endpoint_xfer_int(epwrite))
1386 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1387 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1388 else
1389 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1390 NULL, acm->writesize, acm_write_bulk, snd);
1391 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1392 if (quirks & SEND_ZERO_PACKET)
1393 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1394 snd->instance = acm;
1395 }
1396
1397 usb_set_intfdata(intf, acm);
1398
1399 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1400 if (i < 0)
1401 goto alloc_fail5;
1402
1403 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1404 struct usb_cdc_country_functional_desc * cfd =
1405 h.usb_cdc_country_functional_desc;
1406
1407 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1408 if (!acm->country_codes)
1409 goto skip_countries;
1410 acm->country_code_size = cfd->bLength - 4;
1411 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1412 cfd->bLength - 4);
1413 acm->country_rel_date = cfd->iCountryCodeRelDate;
1414
1415 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1416 if (i < 0) {
1417 kfree(acm->country_codes);
1418 acm->country_codes = NULL;
1419 acm->country_code_size = 0;
1420 goto skip_countries;
1421 }
1422
1423 i = device_create_file(&intf->dev,
1424 &dev_attr_iCountryCodeRelDate);
1425 if (i < 0) {
1426 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1427 kfree(acm->country_codes);
1428 acm->country_codes = NULL;
1429 acm->country_code_size = 0;
1430 goto skip_countries;
1431 }
1432 }
1433
1434 skip_countries:
1435 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1436 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1437 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1438 /* works around buggy devices */
1439 epctrl->bInterval ? epctrl->bInterval : 16);
1440 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1441 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1442 acm->notification_buffer = NULL;
1443 acm->nb_index = 0;
1444 acm->nb_size = 0;
1445
1446 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1447
1448 acm->line.dwDTERate = cpu_to_le32(9600);
1449 acm->line.bDataBits = 8;
1450 acm_set_line(acm, &acm->line);
1451
1452 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1453 usb_set_intfdata(data_interface, acm);
1454
1455 usb_get_intf(control_interface);
1456 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1457 &control_interface->dev);
1458 if (IS_ERR(tty_dev)) {
1459 rv = PTR_ERR(tty_dev);
1460 goto alloc_fail6;
1461 }
1462
1463 if (quirks & CLEAR_HALT_CONDITIONS) {
1464 usb_clear_halt(usb_dev, acm->in);
1465 usb_clear_halt(usb_dev, acm->out);
1466 }
1467
1468 return 0;
1469 alloc_fail6:
1470 if (acm->country_codes) {
1471 device_remove_file(&acm->control->dev,
1472 &dev_attr_wCountryCodes);
1473 device_remove_file(&acm->control->dev,
1474 &dev_attr_iCountryCodeRelDate);
1475 kfree(acm->country_codes);
1476 }
1477 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1478 alloc_fail5:
1479 usb_set_intfdata(intf, NULL);
1480 for (i = 0; i < ACM_NW; i++)
1481 usb_free_urb(acm->wb[i].urb);
1482 alloc_fail4:
1483 for (i = 0; i < num_rx_buf; i++)
1484 usb_free_urb(acm->read_urbs[i]);
1485 acm_read_buffers_free(acm);
1486 usb_free_urb(acm->ctrlurb);
1487 alloc_fail3:
1488 acm_write_buffers_free(acm);
1489 alloc_fail2:
1490 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1491 alloc_fail1:
1492 tty_port_put(&acm->port);
1493 alloc_fail:
1494 return rv;
1495 }
1496
1497 static void acm_disconnect(struct usb_interface *intf)
1498 {
1499 struct acm *acm = usb_get_intfdata(intf);
1500 struct tty_struct *tty;
1501 int i;
1502
1503 /* sibling interface is already cleaning up */
1504 if (!acm)
1505 return;
1506
1507 mutex_lock(&acm->mutex);
1508 acm->disconnected = true;
1509 if (acm->country_codes) {
1510 device_remove_file(&acm->control->dev,
1511 &dev_attr_wCountryCodes);
1512 device_remove_file(&acm->control->dev,
1513 &dev_attr_iCountryCodeRelDate);
1514 }
1515 wake_up_all(&acm->wioctl);
1516 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1517 usb_set_intfdata(acm->control, NULL);
1518 usb_set_intfdata(acm->data, NULL);
1519 mutex_unlock(&acm->mutex);
1520
1521 tty = tty_port_tty_get(&acm->port);
1522 if (tty) {
1523 tty_vhangup(tty);
1524 tty_kref_put(tty);
1525 }
1526
1527 acm_kill_urbs(acm);
1528 cancel_work_sync(&acm->work);
1529
1530 tty_unregister_device(acm_tty_driver, acm->minor);
1531
1532 usb_free_urb(acm->ctrlurb);
1533 for (i = 0; i < ACM_NW; i++)
1534 usb_free_urb(acm->wb[i].urb);
1535 for (i = 0; i < acm->rx_buflimit; i++)
1536 usb_free_urb(acm->read_urbs[i]);
1537 acm_write_buffers_free(acm);
1538 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1539 acm_read_buffers_free(acm);
1540
1541 kfree(acm->notification_buffer);
1542
1543 if (!acm->combined_interfaces)
1544 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1545 acm->data : acm->control);
1546
1547 tty_port_put(&acm->port);
1548 }
1549
1550 #ifdef CONFIG_PM
1551 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1552 {
1553 struct acm *acm = usb_get_intfdata(intf);
1554 int cnt;
1555
1556 spin_lock_irq(&acm->write_lock);
1557 if (PMSG_IS_AUTO(message)) {
1558 if (acm->transmitting) {
1559 spin_unlock_irq(&acm->write_lock);
1560 return -EBUSY;
1561 }
1562 }
1563 cnt = acm->susp_count++;
1564 spin_unlock_irq(&acm->write_lock);
1565
1566 if (cnt)
1567 return 0;
1568
1569 acm_kill_urbs(acm);
1570 cancel_work_sync(&acm->work);
1571
1572 return 0;
1573 }
1574
1575 static int acm_resume(struct usb_interface *intf)
1576 {
1577 struct acm *acm = usb_get_intfdata(intf);
1578 struct urb *urb;
1579 int rv = 0;
1580
1581 spin_lock_irq(&acm->write_lock);
1582
1583 if (--acm->susp_count)
1584 goto out;
1585
1586 if (tty_port_initialized(&acm->port)) {
1587 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1588
1589 for (;;) {
1590 urb = usb_get_from_anchor(&acm->delayed);
1591 if (!urb)
1592 break;
1593
1594 acm_start_wb(acm, urb->context);
1595 }
1596
1597 /*
1598 * delayed error checking because we must
1599 * do the write path at all cost
1600 */
1601 if (rv < 0)
1602 goto out;
1603
1604 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1605 }
1606 out:
1607 spin_unlock_irq(&acm->write_lock);
1608
1609 return rv;
1610 }
1611
1612 static int acm_reset_resume(struct usb_interface *intf)
1613 {
1614 struct acm *acm = usb_get_intfdata(intf);
1615
1616 if (tty_port_initialized(&acm->port))
1617 tty_port_tty_hangup(&acm->port, false);
1618
1619 return acm_resume(intf);
1620 }
1621
1622 #endif /* CONFIG_PM */
1623
1624 static int acm_pre_reset(struct usb_interface *intf)
1625 {
1626 struct acm *acm = usb_get_intfdata(intf);
1627
1628 clear_bit(EVENT_RX_STALL, &acm->flags);
1629 acm->nb_index = 0; /* pending control transfers are lost */
1630
1631 return 0;
1632 }
1633
1634 #define NOKIA_PCSUITE_ACM_INFO(x) \
1635 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1636 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1637 USB_CDC_ACM_PROTO_VENDOR)
1638
1639 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1640 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1641 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1642 USB_CDC_ACM_PROTO_VENDOR)
1643
1644 /*
1645 * USB driver structure.
1646 */
1647
1648 static const struct usb_device_id acm_ids[] = {
1649 /* quirky and broken devices */
1650 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1651 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1652 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1653 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1654 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1655 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1656 },
1657 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1659 },
1660 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1662 },
1663 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1665 },
1666 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
1669 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1670 .driver_info = SINGLE_RX_URB,
1671 },
1672 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1673 .driver_info = SINGLE_RX_URB, /* firmware bug */
1674 },
1675 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1676 .driver_info = SINGLE_RX_URB, /* firmware bug */
1677 },
1678 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1679 .driver_info = SINGLE_RX_URB,
1680 },
1681 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1683 },
1684 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1685 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1686 },
1687 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1688 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1689 },
1690 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1692 },
1693 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1695 },
1696 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1698 },
1699 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1701 },
1702 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1703 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1704 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1705 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1706 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1707 },
1708 /* Motorola H24 HSPA module: */
1709 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1710 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1711 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1712 },
1713 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1714 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1715 },
1716 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1717 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1718 },
1719 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1720 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1721 },
1722 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1723 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1724 },
1725 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1726 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1727 },
1728 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1729 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1730 },
1731
1732 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1733 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1734 data interface instead of
1735 communications interface.
1736 Maybe we should define a new
1737 quirk for this. */
1738 },
1739 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1740 .driver_info = NO_UNION_NORMAL,
1741 },
1742 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1743 .driver_info = NO_UNION_NORMAL,
1744 },
1745 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1746 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1747 },
1748 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1749 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1750 },
1751 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1752 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1753 },
1754 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1755 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1756 },
1757 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
1758 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1759 },
1760
1761 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1762 .driver_info = CLEAR_HALT_CONDITIONS,
1763 },
1764
1765 /* Nokia S60 phones expose two ACM channels. The first is
1766 * a modem and is picked up by the standard AT-command
1767 * information below. The second is 'vendor-specific' but
1768 * is treated as a serial device at the S60 end, so we want
1769 * to expose it on Linux too. */
1770 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1772 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1776 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1785 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1787 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1788 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1790 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1791 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1792 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1793 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1794 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1801 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1802 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1805 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1806 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1810 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1811 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1812 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1813 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1817 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1822 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1827 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1828
1829 /* Support for Owen devices */
1830 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1831
1832 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1833
1834 /* Support for Droids MuIn LCD */
1835 { USB_DEVICE(0x04d8, 0x000b),
1836 .driver_info = NO_DATA_INTERFACE,
1837 },
1838
1839 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1840 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1841 .driver_info = IGNORE_DEVICE,
1842 },
1843 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1844 .driver_info = IGNORE_DEVICE,
1845 },
1846 #endif
1847
1848 /*Samsung phone in firmware update mode */
1849 { USB_DEVICE(0x04e8, 0x685d),
1850 .driver_info = IGNORE_DEVICE,
1851 },
1852
1853 /* Exclude Infineon Flash Loader utility */
1854 { USB_DEVICE(0x058b, 0x0041),
1855 .driver_info = IGNORE_DEVICE,
1856 },
1857
1858 /* control interfaces without any protocol set */
1859 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1860 USB_CDC_PROTO_NONE) },
1861
1862 /* control interfaces with various AT-command sets */
1863 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1864 USB_CDC_ACM_PROTO_AT_V25TER) },
1865 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1866 USB_CDC_ACM_PROTO_AT_PCCA101) },
1867 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1868 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1869 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1870 USB_CDC_ACM_PROTO_AT_GSM) },
1871 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1872 USB_CDC_ACM_PROTO_AT_3G) },
1873 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1874 USB_CDC_ACM_PROTO_AT_CDMA) },
1875
1876 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1877 .driver_info = SEND_ZERO_PACKET,
1878 },
1879
1880 { }
1881 };
1882
1883 MODULE_DEVICE_TABLE(usb, acm_ids);
1884
1885 static struct usb_driver acm_driver = {
1886 .name = "cdc_acm",
1887 .probe = acm_probe,
1888 .disconnect = acm_disconnect,
1889 #ifdef CONFIG_PM
1890 .suspend = acm_suspend,
1891 .resume = acm_resume,
1892 .reset_resume = acm_reset_resume,
1893 #endif
1894 .pre_reset = acm_pre_reset,
1895 .id_table = acm_ids,
1896 #ifdef CONFIG_PM
1897 .supports_autosuspend = 1,
1898 #endif
1899 .disable_hub_initiated_lpm = 1,
1900 };
1901
1902 /*
1903 * TTY driver structures.
1904 */
1905
1906 static const struct tty_operations acm_ops = {
1907 .install = acm_tty_install,
1908 .open = acm_tty_open,
1909 .close = acm_tty_close,
1910 .cleanup = acm_tty_cleanup,
1911 .hangup = acm_tty_hangup,
1912 .write = acm_tty_write,
1913 .write_room = acm_tty_write_room,
1914 .ioctl = acm_tty_ioctl,
1915 .throttle = acm_tty_throttle,
1916 .unthrottle = acm_tty_unthrottle,
1917 .chars_in_buffer = acm_tty_chars_in_buffer,
1918 .break_ctl = acm_tty_break_ctl,
1919 .set_termios = acm_tty_set_termios,
1920 .tiocmget = acm_tty_tiocmget,
1921 .tiocmset = acm_tty_tiocmset,
1922 .get_serial = get_serial_info,
1923 .set_serial = set_serial_info,
1924 .get_icount = acm_tty_get_icount,
1925 };
1926
1927 /*
1928 * Init / exit.
1929 */
1930
1931 static int __init acm_init(void)
1932 {
1933 int retval;
1934 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1935 if (!acm_tty_driver)
1936 return -ENOMEM;
1937 acm_tty_driver->driver_name = "acm",
1938 acm_tty_driver->name = "ttyACM",
1939 acm_tty_driver->major = ACM_TTY_MAJOR,
1940 acm_tty_driver->minor_start = 0,
1941 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1942 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1943 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1944 acm_tty_driver->init_termios = tty_std_termios;
1945 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1946 HUPCL | CLOCAL;
1947 tty_set_operations(acm_tty_driver, &acm_ops);
1948
1949 retval = tty_register_driver(acm_tty_driver);
1950 if (retval) {
1951 put_tty_driver(acm_tty_driver);
1952 return retval;
1953 }
1954
1955 retval = usb_register(&acm_driver);
1956 if (retval) {
1957 tty_unregister_driver(acm_tty_driver);
1958 put_tty_driver(acm_tty_driver);
1959 return retval;
1960 }
1961
1962 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1963
1964 return 0;
1965 }
1966
1967 static void __exit acm_exit(void)
1968 {
1969 usb_deregister(&acm_driver);
1970 tty_unregister_driver(acm_tty_driver);
1971 put_tty_driver(acm_tty_driver);
1972 idr_destroy(&acm_minors);
1973 }
1974
1975 module_init(acm_init);
1976 module_exit(acm_exit);
1977
1978 MODULE_AUTHOR(DRIVER_AUTHOR);
1979 MODULE_DESCRIPTION(DRIVER_DESC);
1980 MODULE_LICENSE("GPL");
1981 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux with added FPC-III support