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x86/topology: Fix function name in documentation
[cris-mirror.git] / drivers / usb / class / cdc-acm.c
blob06b3b54a0e6804494c64c89a9f9181981a1f9c61
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 return wbn;
178 }
179 wbn = (wbn + 1) % ACM_NW;
180 if (++i >= ACM_NW)
181 return -1;
182 }
183 }
184
185 static int acm_wb_is_avail(struct acm *acm)
186 {
187 int i, n;
188 unsigned long flags;
189
190 n = ACM_NW;
191 spin_lock_irqsave(&acm->write_lock, flags);
192 for (i = 0; i < ACM_NW; i++)
193 n -= acm->wb[i].use;
194 spin_unlock_irqrestore(&acm->write_lock, flags);
195 return n;
196 }
197
198 /*
199 * Finish write. Caller must hold acm->write_lock
200 */
201 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
202 {
203 wb->use = 0;
204 acm->transmitting--;
205 usb_autopm_put_interface_async(acm->control);
206 }
207
208 /*
209 * Poke write.
210 *
211 * the caller is responsible for locking
212 */
213
214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
215 {
216 int rc;
217
218 acm->transmitting++;
219
220 wb->urb->transfer_buffer = wb->buf;
221 wb->urb->transfer_dma = wb->dmah;
222 wb->urb->transfer_buffer_length = wb->len;
223 wb->urb->dev = acm->dev;
224
225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
226 if (rc < 0) {
227 dev_err(&acm->data->dev,
228 "%s - usb_submit_urb(write bulk) failed: %d\n",
229 __func__, rc);
230 acm_write_done(acm, wb);
231 }
232 return rc;
233 }
234
235 /*
236 * attributes exported through sysfs
237 */
238 static ssize_t bmCapabilities_show
239 (struct device *dev, struct device_attribute *attr, char *buf)
240 {
241 struct usb_interface *intf = to_usb_interface(dev);
242 struct acm *acm = usb_get_intfdata(intf);
243
244 return sprintf(buf, "%d", acm->ctrl_caps);
245 }
246 static DEVICE_ATTR_RO(bmCapabilities);
247
248 static ssize_t wCountryCodes_show
249 (struct device *dev, struct device_attribute *attr, char *buf)
250 {
251 struct usb_interface *intf = to_usb_interface(dev);
252 struct acm *acm = usb_get_intfdata(intf);
253
254 memcpy(buf, acm->country_codes, acm->country_code_size);
255 return acm->country_code_size;
256 }
257
258 static DEVICE_ATTR_RO(wCountryCodes);
259
260 static ssize_t iCountryCodeRelDate_show
261 (struct device *dev, struct device_attribute *attr, char *buf)
262 {
263 struct usb_interface *intf = to_usb_interface(dev);
264 struct acm *acm = usb_get_intfdata(intf);
265
266 return sprintf(buf, "%d", acm->country_rel_date);
267 }
268
269 static DEVICE_ATTR_RO(iCountryCodeRelDate);
270 /*
271 * Interrupt handlers for various ACM device responses
272 */
273
274 static void acm_process_notification(struct acm *acm, unsigned char *buf)
275 {
276 int newctrl;
277 int difference;
278 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf;
279 unsigned char *data = buf + sizeof(struct usb_cdc_notification);
280
281 switch (dr->bNotificationType) {
282 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
283 dev_dbg(&acm->control->dev,
284 "%s - network connection: %d\n", __func__, dr->wValue);
285 break;
286
287 case USB_CDC_NOTIFY_SERIAL_STATE:
288 if (le16_to_cpu(dr->wLength) != 2) {
289 dev_dbg(&acm->control->dev,
290 "%s - malformed serial state\n", __func__);
291 break;
292 }
293
294 newctrl = get_unaligned_le16(data);
295 dev_dbg(&acm->control->dev,
296 "%s - serial state: 0x%x\n", __func__, newctrl);
297
298 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
299 dev_dbg(&acm->control->dev,
300 "%s - calling hangup\n", __func__);
301 tty_port_tty_hangup(&acm->port, false);
302 }
303
304 difference = acm->ctrlin ^ newctrl;
305 spin_lock(&acm->read_lock);
306 acm->ctrlin = newctrl;
307 acm->oldcount = acm->iocount;
308
309 if (difference & ACM_CTRL_DSR)
310 acm->iocount.dsr++;
311 if (difference & ACM_CTRL_BRK)
312 acm->iocount.brk++;
313 if (difference & ACM_CTRL_RI)
314 acm->iocount.rng++;
315 if (difference & ACM_CTRL_DCD)
316 acm->iocount.dcd++;
317 if (difference & ACM_CTRL_FRAMING)
318 acm->iocount.frame++;
319 if (difference & ACM_CTRL_PARITY)
320 acm->iocount.parity++;
321 if (difference & ACM_CTRL_OVERRUN)
322 acm->iocount.overrun++;
323 spin_unlock(&acm->read_lock);
324
325 if (difference)
326 wake_up_all(&acm->wioctl);
327
328 break;
329
330 default:
331 dev_dbg(&acm->control->dev,
332 "%s - unknown notification %d received: index %d len %d\n",
333 __func__,
334 dr->bNotificationType, dr->wIndex, dr->wLength);
335 }
336 }
337
338 /* control interface reports status changes with "interrupt" transfers */
339 static void acm_ctrl_irq(struct urb *urb)
340 {
341 struct acm *acm = urb->context;
342 struct usb_cdc_notification *dr = urb->transfer_buffer;
343 unsigned int current_size = urb->actual_length;
344 unsigned int expected_size, copy_size, alloc_size;
345 int retval;
346 int status = urb->status;
347
348 switch (status) {
349 case 0:
350 /* success */
351 break;
352 case -ECONNRESET:
353 case -ENOENT:
354 case -ESHUTDOWN:
355 /* this urb is terminated, clean up */
356 acm->nb_index = 0;
357 dev_dbg(&acm->control->dev,
358 "%s - urb shutting down with status: %d\n",
359 __func__, status);
360 return;
361 default:
362 dev_dbg(&acm->control->dev,
363 "%s - nonzero urb status received: %d\n",
364 __func__, status);
365 goto exit;
366 }
367
368 usb_mark_last_busy(acm->dev);
369
370 if (acm->nb_index)
371 dr = (struct usb_cdc_notification *)acm->notification_buffer;
372
373 /* size = notification-header + (optional) data */
374 expected_size = sizeof(struct usb_cdc_notification) +
375 le16_to_cpu(dr->wLength);
376
377 if (current_size < expected_size) {
378 /* notification is transmitted fragmented, reassemble */
379 if (acm->nb_size < expected_size) {
380 if (acm->nb_size) {
381 kfree(acm->notification_buffer);
382 acm->nb_size = 0;
383 }
384 alloc_size = roundup_pow_of_two(expected_size);
385 /*
386 * kmalloc ensures a valid notification_buffer after a
387 * use of kfree in case the previous allocation was too
388 * small. Final freeing is done on disconnect.
389 */
390 acm->notification_buffer =
391 kmalloc(alloc_size, GFP_ATOMIC);
392 if (!acm->notification_buffer)
393 goto exit;
394 acm->nb_size = alloc_size;
395 }
396
397 copy_size = min(current_size,
398 expected_size - acm->nb_index);
399
400 memcpy(&acm->notification_buffer[acm->nb_index],
401 urb->transfer_buffer, copy_size);
402 acm->nb_index += copy_size;
403 current_size = acm->nb_index;
404 }
405
406 if (current_size >= expected_size) {
407 /* notification complete */
408 acm_process_notification(acm, (unsigned char *)dr);
409 acm->nb_index = 0;
410 }
411
412 exit:
413 retval = usb_submit_urb(urb, GFP_ATOMIC);
414 if (retval && retval != -EPERM)
415 dev_err(&acm->control->dev,
416 "%s - usb_submit_urb failed: %d\n", __func__, retval);
417 }
418
419 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
420 {
421 int res;
422
423 if (!test_and_clear_bit(index, &acm->read_urbs_free))
424 return 0;
425
426 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
427 if (res) {
428 if (res != -EPERM && res != -ENODEV) {
429 dev_err(&acm->data->dev,
430 "urb %d failed submission with %d\n",
431 index, res);
432 }
433 set_bit(index, &acm->read_urbs_free);
434 return res;
435 } else {
436 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
437 }
438
439 return 0;
440 }
441
442 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
443 {
444 int res;
445 int i;
446
447 for (i = 0; i < acm->rx_buflimit; ++i) {
448 res = acm_submit_read_urb(acm, i, mem_flags);
449 if (res)
450 return res;
451 }
452
453 return 0;
454 }
455
456 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
457 {
458 if (!urb->actual_length)
459 return;
460
461 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
462 urb->actual_length);
463 tty_flip_buffer_push(&acm->port);
464 }
465
466 static void acm_read_bulk_callback(struct urb *urb)
467 {
468 struct acm_rb *rb = urb->context;
469 struct acm *acm = rb->instance;
470 unsigned long flags;
471 int status = urb->status;
472
473 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
474 rb->index, urb->actual_length, status);
475
476 set_bit(rb->index, &acm->read_urbs_free);
477
478 if (!acm->dev) {
479 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
480 return;
481 }
482
483 switch (status) {
484 case 0:
485 usb_mark_last_busy(acm->dev);
486 acm_process_read_urb(acm, urb);
487 break;
488 case -EPIPE:
489 set_bit(EVENT_RX_STALL, &acm->flags);
490 schedule_work(&acm->work);
491 return;
492 case -ENOENT:
493 case -ECONNRESET:
494 case -ESHUTDOWN:
495 dev_dbg(&acm->data->dev,
496 "%s - urb shutting down with status: %d\n",
497 __func__, status);
498 return;
499 default:
500 dev_dbg(&acm->data->dev,
501 "%s - nonzero urb status received: %d\n",
502 __func__, status);
503 break;
504 }
505
506 /*
507 * Unthrottle may run on another CPU which needs to see events
508 * in the same order. Submission has an implict barrier
509 */
510 smp_mb__before_atomic();
511
512 /* throttle device if requested by tty */
513 spin_lock_irqsave(&acm->read_lock, flags);
514 acm->throttled = acm->throttle_req;
515 if (!acm->throttled) {
516 spin_unlock_irqrestore(&acm->read_lock, flags);
517 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
518 } else {
519 spin_unlock_irqrestore(&acm->read_lock, flags);
520 }
521 }
522
523 /* data interface wrote those outgoing bytes */
524 static void acm_write_bulk(struct urb *urb)
525 {
526 struct acm_wb *wb = urb->context;
527 struct acm *acm = wb->instance;
528 unsigned long flags;
529 int status = urb->status;
530
531 if (status || (urb->actual_length != urb->transfer_buffer_length))
532 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
533 urb->actual_length,
534 urb->transfer_buffer_length,
535 status);
536
537 spin_lock_irqsave(&acm->write_lock, flags);
538 acm_write_done(acm, wb);
539 spin_unlock_irqrestore(&acm->write_lock, flags);
540 set_bit(EVENT_TTY_WAKEUP, &acm->flags);
541 schedule_work(&acm->work);
542 }
543
544 static void acm_softint(struct work_struct *work)
545 {
546 int i;
547 struct acm *acm = container_of(work, struct acm, work);
548
549 if (test_bit(EVENT_RX_STALL, &acm->flags)) {
550 if (!(usb_autopm_get_interface(acm->data))) {
551 for (i = 0; i < acm->rx_buflimit; i++)
552 usb_kill_urb(acm->read_urbs[i]);
553 usb_clear_halt(acm->dev, acm->in);
554 acm_submit_read_urbs(acm, GFP_KERNEL);
555 usb_autopm_put_interface(acm->data);
556 }
557 clear_bit(EVENT_RX_STALL, &acm->flags);
558 }
559
560 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) {
561 tty_port_tty_wakeup(&acm->port);
562 clear_bit(EVENT_TTY_WAKEUP, &acm->flags);
563 }
564 }
565
566 /*
567 * TTY handlers
568 */
569
570 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
571 {
572 struct acm *acm;
573 int retval;
574
575 acm = acm_get_by_minor(tty->index);
576 if (!acm)
577 return -ENODEV;
578
579 retval = tty_standard_install(driver, tty);
580 if (retval)
581 goto error_init_termios;
582
583 tty->driver_data = acm;
584
585 return 0;
586
587 error_init_termios:
588 tty_port_put(&acm->port);
589 return retval;
590 }
591
592 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
593 {
594 struct acm *acm = tty->driver_data;
595
596 return tty_port_open(&acm->port, tty, filp);
597 }
598
599 static void acm_port_dtr_rts(struct tty_port *port, int raise)
600 {
601 struct acm *acm = container_of(port, struct acm, port);
602 int val;
603 int res;
604
605 if (raise)
606 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
607 else
608 val = 0;
609
610 /* FIXME: add missing ctrlout locking throughout driver */
611 acm->ctrlout = val;
612
613 res = acm_set_control(acm, val);
614 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
615 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
616 }
617
618 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
619 {
620 struct acm *acm = container_of(port, struct acm, port);
621 int retval = -ENODEV;
622 int i;
623
624 mutex_lock(&acm->mutex);
625 if (acm->disconnected)
626 goto disconnected;
627
628 retval = usb_autopm_get_interface(acm->control);
629 if (retval)
630 goto error_get_interface;
631
632 /*
633 * FIXME: Why do we need this? Allocating 64K of physically contiguous
634 * memory is really nasty...
635 */
636 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
637 acm->control->needs_remote_wakeup = 1;
638
639 acm->ctrlurb->dev = acm->dev;
640 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
641 if (retval) {
642 dev_err(&acm->control->dev,
643 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
644 goto error_submit_urb;
645 }
646
647 acm_tty_set_termios(tty, NULL);
648
649 /*
650 * Unthrottle device in case the TTY was closed while throttled.
651 */
652 spin_lock_irq(&acm->read_lock);
653 acm->throttled = 0;
654 acm->throttle_req = 0;
655 spin_unlock_irq(&acm->read_lock);
656
657 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
658 if (retval)
659 goto error_submit_read_urbs;
660
661 usb_autopm_put_interface(acm->control);
662
663 mutex_unlock(&acm->mutex);
664
665 return 0;
666
667 error_submit_read_urbs:
668 for (i = 0; i < acm->rx_buflimit; i++)
669 usb_kill_urb(acm->read_urbs[i]);
670 usb_kill_urb(acm->ctrlurb);
671 error_submit_urb:
672 usb_autopm_put_interface(acm->control);
673 error_get_interface:
674 disconnected:
675 mutex_unlock(&acm->mutex);
676
677 return usb_translate_errors(retval);
678 }
679
680 static void acm_port_destruct(struct tty_port *port)
681 {
682 struct acm *acm = container_of(port, struct acm, port);
683
684 acm_release_minor(acm);
685 usb_put_intf(acm->control);
686 kfree(acm->country_codes);
687 kfree(acm);
688 }
689
690 static void acm_port_shutdown(struct tty_port *port)
691 {
692 struct acm *acm = container_of(port, struct acm, port);
693 struct urb *urb;
694 struct acm_wb *wb;
695
696 /*
697 * Need to grab write_lock to prevent race with resume, but no need to
698 * hold it due to the tty-port initialised flag.
699 */
700 spin_lock_irq(&acm->write_lock);
701 spin_unlock_irq(&acm->write_lock);
702
703 usb_autopm_get_interface_no_resume(acm->control);
704 acm->control->needs_remote_wakeup = 0;
705 usb_autopm_put_interface(acm->control);
706
707 for (;;) {
708 urb = usb_get_from_anchor(&acm->delayed);
709 if (!urb)
710 break;
711 wb = urb->context;
712 wb->use = 0;
713 usb_autopm_put_interface_async(acm->control);
714 }
715
716 acm_kill_urbs(acm);
717 }
718
719 static void acm_tty_cleanup(struct tty_struct *tty)
720 {
721 struct acm *acm = tty->driver_data;
722
723 tty_port_put(&acm->port);
724 }
725
726 static void acm_tty_hangup(struct tty_struct *tty)
727 {
728 struct acm *acm = tty->driver_data;
729
730 tty_port_hangup(&acm->port);
731 }
732
733 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
734 {
735 struct acm *acm = tty->driver_data;
736
737 tty_port_close(&acm->port, tty, filp);
738 }
739
740 static int acm_tty_write(struct tty_struct *tty,
741 const unsigned char *buf, int count)
742 {
743 struct acm *acm = tty->driver_data;
744 int stat;
745 unsigned long flags;
746 int wbn;
747 struct acm_wb *wb;
748
749 if (!count)
750 return 0;
751
752 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
753
754 spin_lock_irqsave(&acm->write_lock, flags);
755 wbn = acm_wb_alloc(acm);
756 if (wbn < 0) {
757 spin_unlock_irqrestore(&acm->write_lock, flags);
758 return 0;
759 }
760 wb = &acm->wb[wbn];
761
762 if (!acm->dev) {
763 wb->use = 0;
764 spin_unlock_irqrestore(&acm->write_lock, flags);
765 return -ENODEV;
766 }
767
768 count = (count > acm->writesize) ? acm->writesize : count;
769 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
770 memcpy(wb->buf, buf, count);
771 wb->len = count;
772
773 stat = usb_autopm_get_interface_async(acm->control);
774 if (stat) {
775 wb->use = 0;
776 spin_unlock_irqrestore(&acm->write_lock, flags);
777 return stat;
778 }
779
780 if (acm->susp_count) {
781 if (acm->putbuffer) {
782 /* now to preserve order */
783 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
784 acm->putbuffer = NULL;
785 }
786 usb_anchor_urb(wb->urb, &acm->delayed);
787 spin_unlock_irqrestore(&acm->write_lock, flags);
788 return count;
789 } else {
790 if (acm->putbuffer) {
791 /* at this point there is no good way to handle errors */
792 acm_start_wb(acm, acm->putbuffer);
793 acm->putbuffer = NULL;
794 }
795 }
796
797 stat = acm_start_wb(acm, wb);
798 spin_unlock_irqrestore(&acm->write_lock, flags);
799
800 if (stat < 0)
801 return stat;
802 return count;
803 }
804
805 static void acm_tty_flush_chars(struct tty_struct *tty)
806 {
807 struct acm *acm = tty->driver_data;
808 struct acm_wb *cur = acm->putbuffer;
809 int err;
810 unsigned long flags;
811
812 if (!cur) /* nothing to do */
813 return;
814
815 acm->putbuffer = NULL;
816 err = usb_autopm_get_interface_async(acm->control);
817 spin_lock_irqsave(&acm->write_lock, flags);
818 if (err < 0) {
819 cur->use = 0;
820 acm->putbuffer = cur;
821 goto out;
822 }
823
824 if (acm->susp_count)
825 usb_anchor_urb(cur->urb, &acm->delayed);
826 else
827 acm_start_wb(acm, cur);
828 out:
829 spin_unlock_irqrestore(&acm->write_lock, flags);
830 return;
831 }
832
833 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
834 {
835 struct acm *acm = tty->driver_data;
836 struct acm_wb *cur;
837 int wbn;
838 unsigned long flags;
839
840 overflow:
841 cur = acm->putbuffer;
842 if (!cur) {
843 spin_lock_irqsave(&acm->write_lock, flags);
844 wbn = acm_wb_alloc(acm);
845 if (wbn >= 0) {
846 cur = &acm->wb[wbn];
847 acm->putbuffer = cur;
848 }
849 spin_unlock_irqrestore(&acm->write_lock, flags);
850 if (!cur)
851 return 0;
852 }
853
854 if (cur->len == acm->writesize) {
855 acm_tty_flush_chars(tty);
856 goto overflow;
857 }
858
859 cur->buf[cur->len++] = ch;
860 return 1;
861 }
862
863 static int acm_tty_write_room(struct tty_struct *tty)
864 {
865 struct acm *acm = tty->driver_data;
866 /*
867 * Do not let the line discipline to know that we have a reserve,
868 * or it might get too enthusiastic.
869 */
870 return acm_wb_is_avail(acm) ? acm->writesize : 0;
871 }
872
873 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
874 {
875 struct acm *acm = tty->driver_data;
876 /*
877 * if the device was unplugged then any remaining characters fell out
878 * of the connector ;)
879 */
880 if (acm->disconnected)
881 return 0;
882 /*
883 * This is inaccurate (overcounts), but it works.
884 */
885 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
886 }
887
888 static void acm_tty_throttle(struct tty_struct *tty)
889 {
890 struct acm *acm = tty->driver_data;
891
892 spin_lock_irq(&acm->read_lock);
893 acm->throttle_req = 1;
894 spin_unlock_irq(&acm->read_lock);
895 }
896
897 static void acm_tty_unthrottle(struct tty_struct *tty)
898 {
899 struct acm *acm = tty->driver_data;
900 unsigned int was_throttled;
901
902 spin_lock_irq(&acm->read_lock);
903 was_throttled = acm->throttled;
904 acm->throttled = 0;
905 acm->throttle_req = 0;
906 spin_unlock_irq(&acm->read_lock);
907
908 if (was_throttled)
909 acm_submit_read_urbs(acm, GFP_KERNEL);
910 }
911
912 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
913 {
914 struct acm *acm = tty->driver_data;
915 int retval;
916
917 retval = acm_send_break(acm, state ? 0xffff : 0);
918 if (retval < 0)
919 dev_dbg(&acm->control->dev,
920 "%s - send break failed\n", __func__);
921 return retval;
922 }
923
924 static int acm_tty_tiocmget(struct tty_struct *tty)
925 {
926 struct acm *acm = tty->driver_data;
927
928 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
929 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
930 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
931 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
932 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
933 TIOCM_CTS;
934 }
935
936 static int acm_tty_tiocmset(struct tty_struct *tty,
937 unsigned int set, unsigned int clear)
938 {
939 struct acm *acm = tty->driver_data;
940 unsigned int newctrl;
941
942 newctrl = acm->ctrlout;
943 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
944 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
945 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
946 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
947
948 newctrl = (newctrl & ~clear) | set;
949
950 if (acm->ctrlout == newctrl)
951 return 0;
952 return acm_set_control(acm, acm->ctrlout = newctrl);
953 }
954
955 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
956 {
957 struct serial_struct tmp;
958
959 memset(&tmp, 0, sizeof(tmp));
960 tmp.xmit_fifo_size = acm->writesize;
961 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
962 tmp.close_delay = acm->port.close_delay / 10;
963 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
964 ASYNC_CLOSING_WAIT_NONE :
965 acm->port.closing_wait / 10;
966
967 if (copy_to_user(info, &tmp, sizeof(tmp)))
968 return -EFAULT;
969 else
970 return 0;
971 }
972
973 static int set_serial_info(struct acm *acm,
974 struct serial_struct __user *newinfo)
975 {
976 struct serial_struct new_serial;
977 unsigned int closing_wait, close_delay;
978 int retval = 0;
979
980 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
981 return -EFAULT;
982
983 close_delay = new_serial.close_delay * 10;
984 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
985 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
986
987 mutex_lock(&acm->port.mutex);
988
989 if (!capable(CAP_SYS_ADMIN)) {
990 if ((close_delay != acm->port.close_delay) ||
991 (closing_wait != acm->port.closing_wait))
992 retval = -EPERM;
993 else
994 retval = -EOPNOTSUPP;
995 } else {
996 acm->port.close_delay = close_delay;
997 acm->port.closing_wait = closing_wait;
998 }
999
1000 mutex_unlock(&acm->port.mutex);
1001 return retval;
1002 }
1003
1004 static int wait_serial_change(struct acm *acm, unsigned long arg)
1005 {
1006 int rv = 0;
1007 DECLARE_WAITQUEUE(wait, current);
1008 struct async_icount old, new;
1009
1010 do {
1011 spin_lock_irq(&acm->read_lock);
1012 old = acm->oldcount;
1013 new = acm->iocount;
1014 acm->oldcount = new;
1015 spin_unlock_irq(&acm->read_lock);
1016
1017 if ((arg & TIOCM_DSR) &&
1018 old.dsr != new.dsr)
1019 break;
1020 if ((arg & TIOCM_CD) &&
1021 old.dcd != new.dcd)
1022 break;
1023 if ((arg & TIOCM_RI) &&
1024 old.rng != new.rng)
1025 break;
1026
1027 add_wait_queue(&acm->wioctl, &wait);
1028 set_current_state(TASK_INTERRUPTIBLE);
1029 schedule();
1030 remove_wait_queue(&acm->wioctl, &wait);
1031 if (acm->disconnected) {
1032 if (arg & TIOCM_CD)
1033 break;
1034 else
1035 rv = -ENODEV;
1036 } else {
1037 if (signal_pending(current))
1038 rv = -ERESTARTSYS;
1039 }
1040 } while (!rv);
1041
1042
1043
1044 return rv;
1045 }
1046
1047 static int acm_tty_get_icount(struct tty_struct *tty,
1048 struct serial_icounter_struct *icount)
1049 {
1050 struct acm *acm = tty->driver_data;
1051
1052 icount->dsr = acm->iocount.dsr;
1053 icount->rng = acm->iocount.rng;
1054 icount->dcd = acm->iocount.dcd;
1055 icount->frame = acm->iocount.frame;
1056 icount->overrun = acm->iocount.overrun;
1057 icount->parity = acm->iocount.parity;
1058 icount->brk = acm->iocount.brk;
1059
1060 return 0;
1061 }
1062
1063 static int acm_tty_ioctl(struct tty_struct *tty,
1064 unsigned int cmd, unsigned long arg)
1065 {
1066 struct acm *acm = tty->driver_data;
1067 int rv = -ENOIOCTLCMD;
1068
1069 switch (cmd) {
1070 case TIOCGSERIAL: /* gets serial port data */
1071 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1072 break;
1073 case TIOCSSERIAL:
1074 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1075 break;
1076 case TIOCMIWAIT:
1077 rv = usb_autopm_get_interface(acm->control);
1078 if (rv < 0) {
1079 rv = -EIO;
1080 break;
1081 }
1082 rv = wait_serial_change(acm, arg);
1083 usb_autopm_put_interface(acm->control);
1084 break;
1085 }
1086
1087 return rv;
1088 }
1089
1090 static void acm_tty_set_termios(struct tty_struct *tty,
1091 struct ktermios *termios_old)
1092 {
1093 struct acm *acm = tty->driver_data;
1094 struct ktermios *termios = &tty->termios;
1095 struct usb_cdc_line_coding newline;
1096 int newctrl = acm->ctrlout;
1097
1098 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1099 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1100 newline.bParityType = termios->c_cflag & PARENB ?
1101 (termios->c_cflag & PARODD ? 1 : 2) +
1102 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1103 switch (termios->c_cflag & CSIZE) {
1104 case CS5:
1105 newline.bDataBits = 5;
1106 break;
1107 case CS6:
1108 newline.bDataBits = 6;
1109 break;
1110 case CS7:
1111 newline.bDataBits = 7;
1112 break;
1113 case CS8:
1114 default:
1115 newline.bDataBits = 8;
1116 break;
1117 }
1118 /* FIXME: Needs to clear unsupported bits in the termios */
1119 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1120
1121 if (C_BAUD(tty) == B0) {
1122 newline.dwDTERate = acm->line.dwDTERate;
1123 newctrl &= ~ACM_CTRL_DTR;
1124 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1125 newctrl |= ACM_CTRL_DTR;
1126 }
1127
1128 if (newctrl != acm->ctrlout)
1129 acm_set_control(acm, acm->ctrlout = newctrl);
1130
1131 if (memcmp(&acm->line, &newline, sizeof newline)) {
1132 memcpy(&acm->line, &newline, sizeof newline);
1133 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1134 __func__,
1135 le32_to_cpu(newline.dwDTERate),
1136 newline.bCharFormat, newline.bParityType,
1137 newline.bDataBits);
1138 acm_set_line(acm, &acm->line);
1139 }
1140 }
1141
1142 static const struct tty_port_operations acm_port_ops = {
1143 .dtr_rts = acm_port_dtr_rts,
1144 .shutdown = acm_port_shutdown,
1145 .activate = acm_port_activate,
1146 .destruct = acm_port_destruct,
1147 };
1148
1149 /*
1150 * USB probe and disconnect routines.
1151 */
1152
1153 /* Little helpers: write/read buffers free */
1154 static void acm_write_buffers_free(struct acm *acm)
1155 {
1156 int i;
1157 struct acm_wb *wb;
1158
1159 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1160 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
1161 }
1162
1163 static void acm_read_buffers_free(struct acm *acm)
1164 {
1165 int i;
1166
1167 for (i = 0; i < acm->rx_buflimit; i++)
1168 usb_free_coherent(acm->dev, acm->readsize,
1169 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1170 }
1171
1172 /* Little helper: write buffers allocate */
1173 static int acm_write_buffers_alloc(struct acm *acm)
1174 {
1175 int i;
1176 struct acm_wb *wb;
1177
1178 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1179 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1180 &wb->dmah);
1181 if (!wb->buf) {
1182 while (i != 0) {
1183 --i;
1184 --wb;
1185 usb_free_coherent(acm->dev, acm->writesize,
1186 wb->buf, wb->dmah);
1187 }
1188 return -ENOMEM;
1189 }
1190 }
1191 return 0;
1192 }
1193
1194 static int acm_probe(struct usb_interface *intf,
1195 const struct usb_device_id *id)
1196 {
1197 struct usb_cdc_union_desc *union_header = NULL;
1198 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
1199 unsigned char *buffer = intf->altsetting->extra;
1200 int buflen = intf->altsetting->extralen;
1201 struct usb_interface *control_interface;
1202 struct usb_interface *data_interface;
1203 struct usb_endpoint_descriptor *epctrl = NULL;
1204 struct usb_endpoint_descriptor *epread = NULL;
1205 struct usb_endpoint_descriptor *epwrite = NULL;
1206 struct usb_device *usb_dev = interface_to_usbdev(intf);
1207 struct usb_cdc_parsed_header h;
1208 struct acm *acm;
1209 int minor;
1210 int ctrlsize, readsize;
1211 u8 *buf;
1212 int call_intf_num = -1;
1213 int data_intf_num = -1;
1214 unsigned long quirks;
1215 int num_rx_buf;
1216 int i;
1217 int combined_interfaces = 0;
1218 struct device *tty_dev;
1219 int rv = -ENOMEM;
1220 int res;
1221
1222 /* normal quirks */
1223 quirks = (unsigned long)id->driver_info;
1224
1225 if (quirks == IGNORE_DEVICE)
1226 return -ENODEV;
1227
1228 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1229
1230 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1231
1232 /* handle quirks deadly to normal probing*/
1233 if (quirks == NO_UNION_NORMAL) {
1234 data_interface = usb_ifnum_to_if(usb_dev, 1);
1235 control_interface = usb_ifnum_to_if(usb_dev, 0);
1236 /* we would crash */
1237 if (!data_interface || !control_interface)
1238 return -ENODEV;
1239 goto skip_normal_probe;
1240 }
1241
1242 /* normal probing*/
1243 if (!buffer) {
1244 dev_err(&intf->dev, "Weird descriptor references\n");
1245 return -EINVAL;
1246 }
1247
1248 if (!intf->cur_altsetting)
1249 return -EINVAL;
1250
1251 if (!buflen) {
1252 if (intf->cur_altsetting->endpoint &&
1253 intf->cur_altsetting->endpoint->extralen &&
1254 intf->cur_altsetting->endpoint->extra) {
1255 dev_dbg(&intf->dev,
1256 "Seeking extra descriptors on endpoint\n");
1257 buflen = intf->cur_altsetting->endpoint->extralen;
1258 buffer = intf->cur_altsetting->endpoint->extra;
1259 } else {
1260 dev_err(&intf->dev,
1261 "Zero length descriptor references\n");
1262 return -EINVAL;
1263 }
1264 }
1265
1266 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1267 union_header = h.usb_cdc_union_desc;
1268 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1269 if (cmgmd)
1270 call_intf_num = cmgmd->bDataInterface;
1271
1272 if (!union_header) {
1273 if (call_intf_num > 0) {
1274 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1275 /* quirks for Droids MuIn LCD */
1276 if (quirks & NO_DATA_INTERFACE) {
1277 data_interface = usb_ifnum_to_if(usb_dev, 0);
1278 } else {
1279 data_intf_num = call_intf_num;
1280 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1281 }
1282 control_interface = intf;
1283 } else {
1284 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1285 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1286 return -ENODEV;
1287 } else {
1288 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1289 combined_interfaces = 1;
1290 control_interface = data_interface = intf;
1291 goto look_for_collapsed_interface;
1292 }
1293 }
1294 } else {
1295 data_intf_num = union_header->bSlaveInterface0;
1296 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1297 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1298 }
1299
1300 if (!control_interface || !data_interface) {
1301 dev_dbg(&intf->dev, "no interfaces\n");
1302 return -ENODEV;
1303 }
1304 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1305 return -ENODEV;
1306
1307 if (data_intf_num != call_intf_num)
1308 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1309
1310 if (control_interface == data_interface) {
1311 /* some broken devices designed for windows work this way */
1312 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1313 combined_interfaces = 1;
1314 /* a popular other OS doesn't use it */
1315 quirks |= NO_CAP_LINE;
1316 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1317 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1318 return -EINVAL;
1319 }
1320 look_for_collapsed_interface:
1321 res = usb_find_common_endpoints(data_interface->cur_altsetting,
1322 &epread, &epwrite, &epctrl, NULL);
1323 if (res)
1324 return res;
1325
1326 goto made_compressed_probe;
1327 }
1328
1329 skip_normal_probe:
1330
1331 /*workaround for switched interfaces */
1332 if (data_interface->cur_altsetting->desc.bInterfaceClass
1333 != CDC_DATA_INTERFACE_TYPE) {
1334 if (control_interface->cur_altsetting->desc.bInterfaceClass
1335 == CDC_DATA_INTERFACE_TYPE) {
1336 dev_dbg(&intf->dev,
1337 "Your device has switched interfaces.\n");
1338 swap(control_interface, data_interface);
1339 } else {
1340 return -EINVAL;
1341 }
1342 }
1343
1344 /* Accept probe requests only for the control interface */
1345 if (!combined_interfaces && intf != control_interface)
1346 return -ENODEV;
1347
1348 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1349 /* valid in this context */
1350 dev_dbg(&intf->dev, "The data interface isn't available\n");
1351 return -EBUSY;
1352 }
1353
1354
1355 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1356 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1357 return -EINVAL;
1358
1359 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1360 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1361 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1362
1363
1364 /* workaround for switched endpoints */
1365 if (!usb_endpoint_dir_in(epread)) {
1366 /* descriptors are swapped */
1367 dev_dbg(&intf->dev,
1368 "The data interface has switched endpoints\n");
1369 swap(epread, epwrite);
1370 }
1371 made_compressed_probe:
1372 dev_dbg(&intf->dev, "interfaces are valid\n");
1373
1374 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1375 if (acm == NULL)
1376 goto alloc_fail;
1377
1378 minor = acm_alloc_minor(acm);
1379 if (minor < 0)
1380 goto alloc_fail1;
1381
1382 ctrlsize = usb_endpoint_maxp(epctrl);
1383 readsize = usb_endpoint_maxp(epread) *
1384 (quirks == SINGLE_RX_URB ? 1 : 2);
1385 acm->combined_interfaces = combined_interfaces;
1386 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1387 acm->control = control_interface;
1388 acm->data = data_interface;
1389 acm->minor = minor;
1390 acm->dev = usb_dev;
1391 if (h.usb_cdc_acm_descriptor)
1392 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
1393 if (quirks & NO_CAP_LINE)
1394 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1395 acm->ctrlsize = ctrlsize;
1396 acm->readsize = readsize;
1397 acm->rx_buflimit = num_rx_buf;
1398 INIT_WORK(&acm->work, acm_softint);
1399 init_waitqueue_head(&acm->wioctl);
1400 spin_lock_init(&acm->write_lock);
1401 spin_lock_init(&acm->read_lock);
1402 mutex_init(&acm->mutex);
1403 if (usb_endpoint_xfer_int(epread)) {
1404 acm->bInterval = epread->bInterval;
1405 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress);
1406 } else {
1407 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1408 }
1409 if (usb_endpoint_xfer_int(epwrite))
1410 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress);
1411 else
1412 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress);
1413 tty_port_init(&acm->port);
1414 acm->port.ops = &acm_port_ops;
1415 init_usb_anchor(&acm->delayed);
1416 acm->quirks = quirks;
1417
1418 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1419 if (!buf)
1420 goto alloc_fail2;
1421 acm->ctrl_buffer = buf;
1422
1423 if (acm_write_buffers_alloc(acm) < 0)
1424 goto alloc_fail4;
1425
1426 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1427 if (!acm->ctrlurb)
1428 goto alloc_fail5;
1429
1430 for (i = 0; i < num_rx_buf; i++) {
1431 struct acm_rb *rb = &(acm->read_buffers[i]);
1432 struct urb *urb;
1433
1434 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1435 &rb->dma);
1436 if (!rb->base)
1437 goto alloc_fail6;
1438 rb->index = i;
1439 rb->instance = acm;
1440
1441 urb = usb_alloc_urb(0, GFP_KERNEL);
1442 if (!urb)
1443 goto alloc_fail6;
1444
1445 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1446 urb->transfer_dma = rb->dma;
1447 if (usb_endpoint_xfer_int(epread))
1448 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base,
1449 acm->readsize,
1450 acm_read_bulk_callback, rb,
1451 acm->bInterval);
1452 else
1453 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base,
1454 acm->readsize,
1455 acm_read_bulk_callback, rb);
1456
1457 acm->read_urbs[i] = urb;
1458 __set_bit(i, &acm->read_urbs_free);
1459 }
1460 for (i = 0; i < ACM_NW; i++) {
1461 struct acm_wb *snd = &(acm->wb[i]);
1462
1463 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1464 if (snd->urb == NULL)
1465 goto alloc_fail7;
1466
1467 if (usb_endpoint_xfer_int(epwrite))
1468 usb_fill_int_urb(snd->urb, usb_dev, acm->out,
1469 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1470 else
1471 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out,
1472 NULL, acm->writesize, acm_write_bulk, snd);
1473 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1474 if (quirks & SEND_ZERO_PACKET)
1475 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1476 snd->instance = acm;
1477 }
1478
1479 usb_set_intfdata(intf, acm);
1480
1481 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1482 if (i < 0)
1483 goto alloc_fail7;
1484
1485 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1486 struct usb_cdc_country_functional_desc * cfd =
1487 h.usb_cdc_country_functional_desc;
1488
1489 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1490 if (!acm->country_codes)
1491 goto skip_countries;
1492 acm->country_code_size = cfd->bLength - 4;
1493 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1494 cfd->bLength - 4);
1495 acm->country_rel_date = cfd->iCountryCodeRelDate;
1496
1497 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1498 if (i < 0) {
1499 kfree(acm->country_codes);
1500 acm->country_codes = NULL;
1501 acm->country_code_size = 0;
1502 goto skip_countries;
1503 }
1504
1505 i = device_create_file(&intf->dev,
1506 &dev_attr_iCountryCodeRelDate);
1507 if (i < 0) {
1508 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1509 kfree(acm->country_codes);
1510 acm->country_codes = NULL;
1511 acm->country_code_size = 0;
1512 goto skip_countries;
1513 }
1514 }
1515
1516 skip_countries:
1517 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1518 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1519 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1520 /* works around buggy devices */
1521 epctrl->bInterval ? epctrl->bInterval : 16);
1522 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1523 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1524 acm->notification_buffer = NULL;
1525 acm->nb_index = 0;
1526 acm->nb_size = 0;
1527
1528 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1529
1530 acm->line.dwDTERate = cpu_to_le32(9600);
1531 acm->line.bDataBits = 8;
1532 acm_set_line(acm, &acm->line);
1533
1534 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1535 usb_set_intfdata(data_interface, acm);
1536
1537 usb_get_intf(control_interface);
1538 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1539 &control_interface->dev);
1540 if (IS_ERR(tty_dev)) {
1541 rv = PTR_ERR(tty_dev);
1542 goto alloc_fail8;
1543 }
1544
1545 if (quirks & CLEAR_HALT_CONDITIONS) {
1546 usb_clear_halt(usb_dev, acm->in);
1547 usb_clear_halt(usb_dev, acm->out);
1548 }
1549
1550 return 0;
1551 alloc_fail8:
1552 if (acm->country_codes) {
1553 device_remove_file(&acm->control->dev,
1554 &dev_attr_wCountryCodes);
1555 device_remove_file(&acm->control->dev,
1556 &dev_attr_iCountryCodeRelDate);
1557 kfree(acm->country_codes);
1558 }
1559 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1560 alloc_fail7:
1561 usb_set_intfdata(intf, NULL);
1562 for (i = 0; i < ACM_NW; i++)
1563 usb_free_urb(acm->wb[i].urb);
1564 alloc_fail6:
1565 for (i = 0; i < num_rx_buf; i++)
1566 usb_free_urb(acm->read_urbs[i]);
1567 acm_read_buffers_free(acm);
1568 usb_free_urb(acm->ctrlurb);
1569 alloc_fail5:
1570 acm_write_buffers_free(acm);
1571 alloc_fail4:
1572 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1573 alloc_fail2:
1574 acm_release_minor(acm);
1575 alloc_fail1:
1576 kfree(acm);
1577 alloc_fail:
1578 return rv;
1579 }
1580
1581 static void acm_disconnect(struct usb_interface *intf)
1582 {
1583 struct acm *acm = usb_get_intfdata(intf);
1584 struct tty_struct *tty;
1585
1586 /* sibling interface is already cleaning up */
1587 if (!acm)
1588 return;
1589
1590 mutex_lock(&acm->mutex);
1591 acm->disconnected = true;
1592 if (acm->country_codes) {
1593 device_remove_file(&acm->control->dev,
1594 &dev_attr_wCountryCodes);
1595 device_remove_file(&acm->control->dev,
1596 &dev_attr_iCountryCodeRelDate);
1597 }
1598 wake_up_all(&acm->wioctl);
1599 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1600 usb_set_intfdata(acm->control, NULL);
1601 usb_set_intfdata(acm->data, NULL);
1602 mutex_unlock(&acm->mutex);
1603
1604 tty = tty_port_tty_get(&acm->port);
1605 if (tty) {
1606 tty_vhangup(tty);
1607 tty_kref_put(tty);
1608 }
1609
1610 acm_kill_urbs(acm);
1611 cancel_work_sync(&acm->work);
1612
1613 tty_unregister_device(acm_tty_driver, acm->minor);
1614
1615 acm_write_buffers_free(acm);
1616 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1617 acm_read_buffers_free(acm);
1618
1619 kfree(acm->notification_buffer);
1620
1621 if (!acm->combined_interfaces)
1622 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1623 acm->data : acm->control);
1624
1625 tty_port_put(&acm->port);
1626 }
1627
1628 #ifdef CONFIG_PM
1629 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1630 {
1631 struct acm *acm = usb_get_intfdata(intf);
1632 int cnt;
1633
1634 spin_lock_irq(&acm->write_lock);
1635 if (PMSG_IS_AUTO(message)) {
1636 if (acm->transmitting) {
1637 spin_unlock_irq(&acm->write_lock);
1638 return -EBUSY;
1639 }
1640 }
1641 cnt = acm->susp_count++;
1642 spin_unlock_irq(&acm->write_lock);
1643
1644 if (cnt)
1645 return 0;
1646
1647 acm_kill_urbs(acm);
1648 cancel_work_sync(&acm->work);
1649
1650 return 0;
1651 }
1652
1653 static int acm_resume(struct usb_interface *intf)
1654 {
1655 struct acm *acm = usb_get_intfdata(intf);
1656 struct urb *urb;
1657 int rv = 0;
1658
1659 spin_lock_irq(&acm->write_lock);
1660
1661 if (--acm->susp_count)
1662 goto out;
1663
1664 if (tty_port_initialized(&acm->port)) {
1665 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1666
1667 for (;;) {
1668 urb = usb_get_from_anchor(&acm->delayed);
1669 if (!urb)
1670 break;
1671
1672 acm_start_wb(acm, urb->context);
1673 }
1674
1675 /*
1676 * delayed error checking because we must
1677 * do the write path at all cost
1678 */
1679 if (rv < 0)
1680 goto out;
1681
1682 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1683 }
1684 out:
1685 spin_unlock_irq(&acm->write_lock);
1686
1687 return rv;
1688 }
1689
1690 static int acm_reset_resume(struct usb_interface *intf)
1691 {
1692 struct acm *acm = usb_get_intfdata(intf);
1693
1694 if (tty_port_initialized(&acm->port))
1695 tty_port_tty_hangup(&acm->port, false);
1696
1697 return acm_resume(intf);
1698 }
1699
1700 #endif /* CONFIG_PM */
1701
1702 static int acm_pre_reset(struct usb_interface *intf)
1703 {
1704 struct acm *acm = usb_get_intfdata(intf);
1705
1706 clear_bit(EVENT_RX_STALL, &acm->flags);
1707
1708 return 0;
1709 }
1710
1711 #define NOKIA_PCSUITE_ACM_INFO(x) \
1712 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1713 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1714 USB_CDC_ACM_PROTO_VENDOR)
1715
1716 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1717 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1718 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1719 USB_CDC_ACM_PROTO_VENDOR)
1720
1721 /*
1722 * USB driver structure.
1723 */
1724
1725 static const struct usb_device_id acm_ids[] = {
1726 /* quirky and broken devices */
1727 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1728 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1729 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1730 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1731 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1732 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1733 },
1734 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1735 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
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(0x22b8, 0x7000), /* Motorola Q Phone */
1759 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1760 },
1761 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1763 },
1764 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1766 },
1767 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1769 },
1770 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1772 },
1773 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1774 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1775 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1776 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1777 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1778 },
1779 /* Motorola H24 HSPA module: */
1780 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1781 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1782 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1783 },
1784 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1785 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1786 },
1787 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1789 },
1790 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1792 },
1793 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1795 },
1796 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1798 },
1799 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1801 },
1802
1803 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1804 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1805 data interface instead of
1806 communications interface.
1807 Maybe we should define a new
1808 quirk for this. */
1809 },
1810 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1811 .driver_info = NO_UNION_NORMAL,
1812 },
1813 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1814 .driver_info = NO_UNION_NORMAL,
1815 },
1816 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1817 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1818 },
1819 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1820 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1821 },
1822 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1824 },
1825 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1826 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1827 },
1828
1829 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1830 .driver_info = CLEAR_HALT_CONDITIONS,
1831 },
1832
1833 /* Nokia S60 phones expose two ACM channels. The first is
1834 * a modem and is picked up by the standard AT-command
1835 * information below. The second is 'vendor-specific' but
1836 * is treated as a serial device at the S60 end, so we want
1837 * to expose it on Linux too. */
1838 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1839 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1840 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1841 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1842 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1844 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1845 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1847 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1849 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1851 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1853 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1855 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1856 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1857 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1858 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1859 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1860 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1861 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1862 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1863 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1864 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1865 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1866 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1867 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1868 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1869 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1870 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1871 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1872 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1873 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1874 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1875 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1876 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1877 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1878 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1879 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1880 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1881 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1882 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1883 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1884 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1885 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1886 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1887 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1888 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1889 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1890 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1891 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1892 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1893 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1894 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1895 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1896
1897 /* Support for Owen devices */
1898 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1899
1900 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1901
1902 /* Support for Droids MuIn LCD */
1903 { USB_DEVICE(0x04d8, 0x000b),
1904 .driver_info = NO_DATA_INTERFACE,
1905 },
1906
1907 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1908 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1909 .driver_info = IGNORE_DEVICE,
1910 },
1911 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1912 .driver_info = IGNORE_DEVICE,
1913 },
1914 #endif
1915
1916 /*Samsung phone in firmware update mode */
1917 { USB_DEVICE(0x04e8, 0x685d),
1918 .driver_info = IGNORE_DEVICE,
1919 },
1920
1921 /* Exclude Infineon Flash Loader utility */
1922 { USB_DEVICE(0x058b, 0x0041),
1923 .driver_info = IGNORE_DEVICE,
1924 },
1925
1926 /* control interfaces without any protocol set */
1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1928 USB_CDC_PROTO_NONE) },
1929
1930 /* control interfaces with various AT-command sets */
1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1932 USB_CDC_ACM_PROTO_AT_V25TER) },
1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1934 USB_CDC_ACM_PROTO_AT_PCCA101) },
1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1936 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1938 USB_CDC_ACM_PROTO_AT_GSM) },
1939 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1940 USB_CDC_ACM_PROTO_AT_3G) },
1941 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1942 USB_CDC_ACM_PROTO_AT_CDMA) },
1943
1944 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1945 .driver_info = SEND_ZERO_PACKET,
1946 },
1947
1948 { }
1949 };
1950
1951 MODULE_DEVICE_TABLE(usb, acm_ids);
1952
1953 static struct usb_driver acm_driver = {
1954 .name = "cdc_acm",
1955 .probe = acm_probe,
1956 .disconnect = acm_disconnect,
1957 #ifdef CONFIG_PM
1958 .suspend = acm_suspend,
1959 .resume = acm_resume,
1960 .reset_resume = acm_reset_resume,
1961 #endif
1962 .pre_reset = acm_pre_reset,
1963 .id_table = acm_ids,
1964 #ifdef CONFIG_PM
1965 .supports_autosuspend = 1,
1966 #endif
1967 .disable_hub_initiated_lpm = 1,
1968 };
1969
1970 /*
1971 * TTY driver structures.
1972 */
1973
1974 static const struct tty_operations acm_ops = {
1975 .install = acm_tty_install,
1976 .open = acm_tty_open,
1977 .close = acm_tty_close,
1978 .cleanup = acm_tty_cleanup,
1979 .hangup = acm_tty_hangup,
1980 .write = acm_tty_write,
1981 .put_char = acm_tty_put_char,
1982 .flush_chars = acm_tty_flush_chars,
1983 .write_room = acm_tty_write_room,
1984 .ioctl = acm_tty_ioctl,
1985 .throttle = acm_tty_throttle,
1986 .unthrottle = acm_tty_unthrottle,
1987 .chars_in_buffer = acm_tty_chars_in_buffer,
1988 .break_ctl = acm_tty_break_ctl,
1989 .set_termios = acm_tty_set_termios,
1990 .tiocmget = acm_tty_tiocmget,
1991 .tiocmset = acm_tty_tiocmset,
1992 .get_icount = acm_tty_get_icount,
1993 };
1994
1995 /*
1996 * Init / exit.
1997 */
1998
1999 static int __init acm_init(void)
2000 {
2001 int retval;
2002 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2003 if (!acm_tty_driver)
2004 return -ENOMEM;
2005 acm_tty_driver->driver_name = "acm",
2006 acm_tty_driver->name = "ttyACM",
2007 acm_tty_driver->major = ACM_TTY_MAJOR,
2008 acm_tty_driver->minor_start = 0,
2009 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2010 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2011 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2012 acm_tty_driver->init_termios = tty_std_termios;
2013 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2014 HUPCL | CLOCAL;
2015 tty_set_operations(acm_tty_driver, &acm_ops);
2016
2017 retval = tty_register_driver(acm_tty_driver);
2018 if (retval) {
2019 put_tty_driver(acm_tty_driver);
2020 return retval;
2021 }
2022
2023 retval = usb_register(&acm_driver);
2024 if (retval) {
2025 tty_unregister_driver(acm_tty_driver);
2026 put_tty_driver(acm_tty_driver);
2027 return retval;
2028 }
2029
2030 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2031
2032 return 0;
2033 }
2034
2035 static void __exit acm_exit(void)
2036 {
2037 usb_deregister(&acm_driver);
2038 tty_unregister_driver(acm_tty_driver);
2039 put_tty_driver(acm_tty_driver);
2040 idr_destroy(&acm_minors);
2041 }
2042
2043 module_init(acm_init);
2044 module_exit(acm_exit);
2045
2046 MODULE_AUTHOR(DRIVER_AUTHOR);
2047 MODULE_DESCRIPTION(DRIVER_DESC);
2048 MODULE_LICENSE("GPL");
2049 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
CRIS linux kernel tree