1 /*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #undef DEBUG
32 #undef VERBOSE_DEBUG
33
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/tty.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/tty_flip.h>
42 #include <linux/module.h>
43 #include <linux/mutex.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/usb/cdc.h>
47 #include <asm/byteorder.h>
48 #include <asm/unaligned.h>
49 #include <linux/idr.h>
50 #include <linux/list.h>
51
52 #include "cdc-acm.h"
53
54
55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
57
58 static struct usb_driver acm_driver;
59 static struct tty_driver *acm_tty_driver;
60
61 static DEFINE_IDR(acm_minors);
62 static DEFINE_MUTEX(acm_minors_lock);
63
64 static void acm_tty_set_termios(struct tty_struct *tty,
65 struct ktermios *termios_old);
66
67 /*
68 * acm_minors accessors
69 */
70
71 /*
72 * Look up an ACM structure by minor. If found and not disconnected, increment
73 * its refcount and return it with its mutex held.
74 */
acm_get_by_minor(unsigned int minor)75 static struct acm *acm_get_by_minor(unsigned int minor)
76 {
77 struct acm *acm;
78
79 mutex_lock(&acm_minors_lock);
80 acm = idr_find(&acm_minors, minor);
81 if (acm) {
82 mutex_lock(&acm->mutex);
83 if (acm->disconnected) {
84 mutex_unlock(&acm->mutex);
85 acm = NULL;
86 } else {
87 tty_port_get(&acm->port);
88 mutex_unlock(&acm->mutex);
89 }
90 }
91 mutex_unlock(&acm_minors_lock);
92 return acm;
93 }
94
95 /*
96 * Try to find an available minor number and if found, associate it with 'acm'.
97 */
acm_alloc_minor(struct acm * acm)98 static int acm_alloc_minor(struct acm *acm)
99 {
100 int minor;
101
102 mutex_lock(&acm_minors_lock);
103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
104 mutex_unlock(&acm_minors_lock);
105
106 return minor;
107 }
108
109 /* Release the minor number associated with 'acm'. */
acm_release_minor(struct acm * acm)110 static void acm_release_minor(struct acm *acm)
111 {
112 mutex_lock(&acm_minors_lock);
113 idr_remove(&acm_minors, acm->minor);
114 mutex_unlock(&acm_minors_lock);
115 }
116
117 /*
118 * Functions for ACM control messages.
119 */
120
acm_ctrl_msg(struct acm * acm,int request,int value,void * buf,int len)121 static int acm_ctrl_msg(struct acm *acm, int request, int value,
122 void *buf, int len)
123 {
124 int retval;
125
126 retval = usb_autopm_get_interface(acm->control);
127 if (retval)
128 return retval;
129
130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
131 request, USB_RT_ACM, value,
132 acm->control->altsetting[0].desc.bInterfaceNumber,
133 buf, len, 5000);
134
135 dev_dbg(&acm->control->dev,
136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__, request, value, len, retval);
138
139 usb_autopm_put_interface(acm->control);
140
141 return retval < 0 ? retval : 0;
142 }
143
144 /* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
146 */
acm_set_control(struct acm * acm,int control)147 static inline int acm_set_control(struct acm *acm, int control)
148 {
149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
150 return -EOPNOTSUPP;
151
152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
153 control, NULL, 0);
154 }
155
156 #define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158 #define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
160
161 /*
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
acm_wb_alloc(struct acm * acm)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
acm_wb_is_avail(struct acm * acm)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 */
acm_write_done(struct acm * acm,struct acm_wb * wb)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
acm_start_wb(struct acm * acm,struct acm_wb * wb)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 */
show_caps(struct device * dev,struct device_attribute * attr,char * buf)238 static ssize_t show_caps
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(bmCapabilities, S_IRUGO, show_caps, NULL);
247
show_country_codes(struct device * dev,struct device_attribute * attr,char * buf)248 static ssize_t show_country_codes
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(wCountryCodes, S_IRUGO, show_country_codes, NULL);
259
show_country_rel_date(struct device * dev,struct device_attribute * attr,char * buf)260 static ssize_t show_country_rel_date
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(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
270 /*
271 * Interrupt handlers for various ACM device responses
272 */
273
274 /* control interface reports status changes with "interrupt" transfers */
acm_ctrl_irq(struct urb * urb)275 static void acm_ctrl_irq(struct urb *urb)
276 {
277 struct acm *acm = urb->context;
278 struct usb_cdc_notification *dr = urb->transfer_buffer;
279 unsigned char *data;
280 int newctrl;
281 int difference;
282 int retval;
283 int status = urb->status;
284
285 switch (status) {
286 case 0:
287 /* success */
288 break;
289 case -ECONNRESET:
290 case -ENOENT:
291 case -ESHUTDOWN:
292 /* this urb is terminated, clean up */
293 dev_dbg(&acm->control->dev,
294 "%s - urb shutting down with status: %d\n",
295 __func__, status);
296 return;
297 default:
298 dev_dbg(&acm->control->dev,
299 "%s - nonzero urb status received: %d\n",
300 __func__, status);
301 goto exit;
302 }
303
304 usb_mark_last_busy(acm->dev);
305
306 data = (unsigned char *)(dr + 1);
307 switch (dr->bNotificationType) {
308 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
310 __func__, dr->wValue);
311 break;
312
313 case USB_CDC_NOTIFY_SERIAL_STATE:
314 newctrl = get_unaligned_le16(data);
315
316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
317 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
318 __func__);
319 tty_port_tty_hangup(&acm->port, false);
320 }
321
322 difference = acm->ctrlin ^ newctrl;
323 spin_lock(&acm->read_lock);
324 acm->ctrlin = newctrl;
325 acm->oldcount = acm->iocount;
326
327 if (difference & ACM_CTRL_DSR)
328 acm->iocount.dsr++;
329 if (difference & ACM_CTRL_BRK)
330 acm->iocount.brk++;
331 if (difference & ACM_CTRL_RI)
332 acm->iocount.rng++;
333 if (difference & ACM_CTRL_DCD)
334 acm->iocount.dcd++;
335 if (difference & ACM_CTRL_FRAMING)
336 acm->iocount.frame++;
337 if (difference & ACM_CTRL_PARITY)
338 acm->iocount.parity++;
339 if (difference & ACM_CTRL_OVERRUN)
340 acm->iocount.overrun++;
341 spin_unlock(&acm->read_lock);
342
343 if (difference)
344 wake_up_all(&acm->wioctl);
345
346 break;
347
348 default:
349 dev_dbg(&acm->control->dev,
350 "%s - unknown notification %d received: index %d "
351 "len %d data0 %d data1 %d\n",
352 __func__,
353 dr->bNotificationType, dr->wIndex,
354 dr->wLength, data[0], data[1]);
355 break;
356 }
357 exit:
358 retval = usb_submit_urb(urb, GFP_ATOMIC);
359 if (retval && retval != -EPERM)
360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
361 __func__, retval);
362 }
363
acm_submit_read_urb(struct acm * acm,int index,gfp_t mem_flags)364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
365 {
366 int res;
367
368 if (!test_and_clear_bit(index, &acm->read_urbs_free))
369 return 0;
370
371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
372
373 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
374 if (res) {
375 if (res != -EPERM) {
376 dev_err(&acm->data->dev,
377 "%s - usb_submit_urb failed: %d\n",
378 __func__, res);
379 }
380 set_bit(index, &acm->read_urbs_free);
381 return res;
382 }
383
384 return 0;
385 }
386
acm_submit_read_urbs(struct acm * acm,gfp_t mem_flags)387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
388 {
389 int res;
390 int i;
391
392 for (i = 0; i < acm->rx_buflimit; ++i) {
393 res = acm_submit_read_urb(acm, i, mem_flags);
394 if (res)
395 return res;
396 }
397
398 return 0;
399 }
400
acm_process_read_urb(struct acm * acm,struct urb * urb)401 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
402 {
403 if (!urb->actual_length)
404 return;
405
406 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
407 urb->actual_length);
408 tty_flip_buffer_push(&acm->port);
409 }
410
acm_read_bulk_callback(struct urb * urb)411 static void acm_read_bulk_callback(struct urb *urb)
412 {
413 struct acm_rb *rb = urb->context;
414 struct acm *acm = rb->instance;
415 unsigned long flags;
416 int status = urb->status;
417
418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
419 rb->index, urb->actual_length);
420
421 if (!acm->dev) {
422 set_bit(rb->index, &acm->read_urbs_free);
423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
424 return;
425 }
426
427 if (status) {
428 set_bit(rb->index, &acm->read_urbs_free);
429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
430 __func__, status);
431 if ((status != -ENOENT) || (urb->actual_length == 0))
432 return;
433 }
434
435 usb_mark_last_busy(acm->dev);
436
437 acm_process_read_urb(acm, urb);
438 /*
439 * Unthrottle may run on another CPU which needs to see events
440 * in the same order. Submission has an implict barrier
441 */
442 smp_mb__before_atomic();
443 set_bit(rb->index, &acm->read_urbs_free);
444
445 /* throttle device if requested by tty */
446 spin_lock_irqsave(&acm->read_lock, flags);
447 acm->throttled = acm->throttle_req;
448 if (!acm->throttled) {
449 spin_unlock_irqrestore(&acm->read_lock, flags);
450 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
451 } else {
452 spin_unlock_irqrestore(&acm->read_lock, flags);
453 }
454 }
455
456 /* data interface wrote those outgoing bytes */
acm_write_bulk(struct urb * urb)457 static void acm_write_bulk(struct urb *urb)
458 {
459 struct acm_wb *wb = urb->context;
460 struct acm *acm = wb->instance;
461 unsigned long flags;
462 int status = urb->status;
463
464 if (status || (urb->actual_length != urb->transfer_buffer_length))
465 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
466 __func__,
467 urb->actual_length,
468 urb->transfer_buffer_length,
469 status);
470
471 spin_lock_irqsave(&acm->write_lock, flags);
472 acm_write_done(acm, wb);
473 spin_unlock_irqrestore(&acm->write_lock, flags);
474 schedule_work(&acm->work);
475 }
476
acm_softint(struct work_struct * work)477 static void acm_softint(struct work_struct *work)
478 {
479 struct acm *acm = container_of(work, struct acm, work);
480
481 dev_vdbg(&acm->data->dev, "%s\n", __func__);
482
483 tty_port_tty_wakeup(&acm->port);
484 }
485
486 /*
487 * TTY handlers
488 */
489
acm_tty_install(struct tty_driver * driver,struct tty_struct * tty)490 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
491 {
492 struct acm *acm;
493 int retval;
494
495 dev_dbg(tty->dev, "%s\n", __func__);
496
497 acm = acm_get_by_minor(tty->index);
498 if (!acm)
499 return -ENODEV;
500
501 retval = tty_standard_install(driver, tty);
502 if (retval)
503 goto error_init_termios;
504
505 tty->driver_data = acm;
506
507 return 0;
508
509 error_init_termios:
510 tty_port_put(&acm->port);
511 return retval;
512 }
513
acm_tty_open(struct tty_struct * tty,struct file * filp)514 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
515 {
516 struct acm *acm = tty->driver_data;
517
518 dev_dbg(tty->dev, "%s\n", __func__);
519
520 return tty_port_open(&acm->port, tty, filp);
521 }
522
acm_port_dtr_rts(struct tty_port * port,int raise)523 static void acm_port_dtr_rts(struct tty_port *port, int raise)
524 {
525 struct acm *acm = container_of(port, struct acm, port);
526 int val;
527 int res;
528
529 if (raise)
530 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
531 else
532 val = 0;
533
534 /* FIXME: add missing ctrlout locking throughout driver */
535 acm->ctrlout = val;
536
537 res = acm_set_control(acm, val);
538 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
539 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
540 }
541
acm_port_activate(struct tty_port * port,struct tty_struct * tty)542 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
543 {
544 struct acm *acm = container_of(port, struct acm, port);
545 int retval = -ENODEV;
546 int i;
547
548 dev_dbg(&acm->control->dev, "%s\n", __func__);
549
550 mutex_lock(&acm->mutex);
551 if (acm->disconnected)
552 goto disconnected;
553
554 retval = usb_autopm_get_interface(acm->control);
555 if (retval)
556 goto error_get_interface;
557
558 /*
559 * FIXME: Why do we need this? Allocating 64K of physically contiguous
560 * memory is really nasty...
561 */
562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
563 acm->control->needs_remote_wakeup = 1;
564
565 acm->ctrlurb->dev = acm->dev;
566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
567 if (retval) {
568 dev_err(&acm->control->dev,
569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
570 goto error_submit_urb;
571 }
572
573 acm_tty_set_termios(tty, NULL);
574
575 /*
576 * Unthrottle device in case the TTY was closed while throttled.
577 */
578 spin_lock_irq(&acm->read_lock);
579 acm->throttled = 0;
580 acm->throttle_req = 0;
581 spin_unlock_irq(&acm->read_lock);
582
583 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
584 if (retval)
585 goto error_submit_read_urbs;
586
587 usb_autopm_put_interface(acm->control);
588
589 mutex_unlock(&acm->mutex);
590
591 return 0;
592
593 error_submit_read_urbs:
594 for (i = 0; i < acm->rx_buflimit; i++)
595 usb_kill_urb(acm->read_urbs[i]);
596 usb_kill_urb(acm->ctrlurb);
597 error_submit_urb:
598 usb_autopm_put_interface(acm->control);
599 error_get_interface:
600 disconnected:
601 mutex_unlock(&acm->mutex);
602
603 return usb_translate_errors(retval);
604 }
605
acm_port_destruct(struct tty_port * port)606 static void acm_port_destruct(struct tty_port *port)
607 {
608 struct acm *acm = container_of(port, struct acm, port);
609
610 dev_dbg(&acm->control->dev, "%s\n", __func__);
611
612 acm_release_minor(acm);
613 usb_put_intf(acm->control);
614 kfree(acm->country_codes);
615 kfree(acm);
616 }
617
acm_port_shutdown(struct tty_port * port)618 static void acm_port_shutdown(struct tty_port *port)
619 {
620 struct acm *acm = container_of(port, struct acm, port);
621 struct urb *urb;
622 struct acm_wb *wb;
623 int i;
624
625 dev_dbg(&acm->control->dev, "%s\n", __func__);
626
627 /*
628 * Need to grab write_lock to prevent race with resume, but no need to
629 * hold it due to the tty-port initialised flag.
630 */
631 spin_lock_irq(&acm->write_lock);
632 spin_unlock_irq(&acm->write_lock);
633
634 usb_autopm_get_interface_no_resume(acm->control);
635 acm->control->needs_remote_wakeup = 0;
636 usb_autopm_put_interface(acm->control);
637
638 for (;;) {
639 urb = usb_get_from_anchor(&acm->delayed);
640 if (!urb)
641 break;
642 wb = urb->context;
643 wb->use = 0;
644 usb_autopm_put_interface_async(acm->control);
645 }
646
647 usb_kill_urb(acm->ctrlurb);
648 for (i = 0; i < ACM_NW; i++)
649 usb_kill_urb(acm->wb[i].urb);
650 for (i = 0; i < acm->rx_buflimit; i++)
651 usb_kill_urb(acm->read_urbs[i]);
652 }
653
acm_tty_cleanup(struct tty_struct * tty)654 static void acm_tty_cleanup(struct tty_struct *tty)
655 {
656 struct acm *acm = tty->driver_data;
657 dev_dbg(&acm->control->dev, "%s\n", __func__);
658 tty_port_put(&acm->port);
659 }
660
acm_tty_hangup(struct tty_struct * tty)661 static void acm_tty_hangup(struct tty_struct *tty)
662 {
663 struct acm *acm = tty->driver_data;
664 dev_dbg(&acm->control->dev, "%s\n", __func__);
665 tty_port_hangup(&acm->port);
666 }
667
acm_tty_close(struct tty_struct * tty,struct file * filp)668 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
669 {
670 struct acm *acm = tty->driver_data;
671 dev_dbg(&acm->control->dev, "%s\n", __func__);
672 tty_port_close(&acm->port, tty, filp);
673 }
674
acm_tty_write(struct tty_struct * tty,const unsigned char * buf,int count)675 static int acm_tty_write(struct tty_struct *tty,
676 const unsigned char *buf, int count)
677 {
678 struct acm *acm = tty->driver_data;
679 int stat;
680 unsigned long flags;
681 int wbn;
682 struct acm_wb *wb;
683
684 if (!count)
685 return 0;
686
687 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
688
689 spin_lock_irqsave(&acm->write_lock, flags);
690 wbn = acm_wb_alloc(acm);
691 if (wbn < 0) {
692 spin_unlock_irqrestore(&acm->write_lock, flags);
693 return 0;
694 }
695 wb = &acm->wb[wbn];
696
697 if (!acm->dev) {
698 wb->use = 0;
699 spin_unlock_irqrestore(&acm->write_lock, flags);
700 return -ENODEV;
701 }
702
703 count = (count > acm->writesize) ? acm->writesize : count;
704 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
705 memcpy(wb->buf, buf, count);
706 wb->len = count;
707
708 stat = usb_autopm_get_interface_async(acm->control);
709 if (stat) {
710 wb->use = 0;
711 spin_unlock_irqrestore(&acm->write_lock, flags);
712 return stat;
713 }
714
715 if (acm->susp_count) {
716 usb_anchor_urb(wb->urb, &acm->delayed);
717 spin_unlock_irqrestore(&acm->write_lock, flags);
718 return count;
719 }
720
721 stat = acm_start_wb(acm, wb);
722 spin_unlock_irqrestore(&acm->write_lock, flags);
723
724 if (stat < 0)
725 return stat;
726 return count;
727 }
728
acm_tty_write_room(struct tty_struct * tty)729 static int acm_tty_write_room(struct tty_struct *tty)
730 {
731 struct acm *acm = tty->driver_data;
732 /*
733 * Do not let the line discipline to know that we have a reserve,
734 * or it might get too enthusiastic.
735 */
736 return acm_wb_is_avail(acm) ? acm->writesize : 0;
737 }
738
acm_tty_chars_in_buffer(struct tty_struct * tty)739 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
740 {
741 struct acm *acm = tty->driver_data;
742 /*
743 * if the device was unplugged then any remaining characters fell out
744 * of the connector ;)
745 */
746 if (acm->disconnected)
747 return 0;
748 /*
749 * This is inaccurate (overcounts), but it works.
750 */
751 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
752 }
753
acm_tty_throttle(struct tty_struct * tty)754 static void acm_tty_throttle(struct tty_struct *tty)
755 {
756 struct acm *acm = tty->driver_data;
757
758 spin_lock_irq(&acm->read_lock);
759 acm->throttle_req = 1;
760 spin_unlock_irq(&acm->read_lock);
761 }
762
acm_tty_unthrottle(struct tty_struct * tty)763 static void acm_tty_unthrottle(struct tty_struct *tty)
764 {
765 struct acm *acm = tty->driver_data;
766 unsigned int was_throttled;
767
768 spin_lock_irq(&acm->read_lock);
769 was_throttled = acm->throttled;
770 acm->throttled = 0;
771 acm->throttle_req = 0;
772 spin_unlock_irq(&acm->read_lock);
773
774 if (was_throttled)
775 acm_submit_read_urbs(acm, GFP_KERNEL);
776 }
777
acm_tty_break_ctl(struct tty_struct * tty,int state)778 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
779 {
780 struct acm *acm = tty->driver_data;
781 int retval;
782
783 retval = acm_send_break(acm, state ? 0xffff : 0);
784 if (retval < 0)
785 dev_dbg(&acm->control->dev, "%s - send break failed\n",
786 __func__);
787 return retval;
788 }
789
acm_tty_tiocmget(struct tty_struct * tty)790 static int acm_tty_tiocmget(struct tty_struct *tty)
791 {
792 struct acm *acm = tty->driver_data;
793
794 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
795 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
796 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
797 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
798 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
799 TIOCM_CTS;
800 }
801
acm_tty_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)802 static int acm_tty_tiocmset(struct tty_struct *tty,
803 unsigned int set, unsigned int clear)
804 {
805 struct acm *acm = tty->driver_data;
806 unsigned int newctrl;
807
808 newctrl = acm->ctrlout;
809 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
810 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
811 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
812 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
813
814 newctrl = (newctrl & ~clear) | set;
815
816 if (acm->ctrlout == newctrl)
817 return 0;
818 return acm_set_control(acm, acm->ctrlout = newctrl);
819 }
820
get_serial_info(struct acm * acm,struct serial_struct __user * info)821 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
822 {
823 struct serial_struct tmp;
824
825 if (!info)
826 return -EINVAL;
827
828 memset(&tmp, 0, sizeof(tmp));
829 tmp.flags = ASYNC_LOW_LATENCY;
830 tmp.xmit_fifo_size = acm->writesize;
831 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
832 tmp.close_delay = acm->port.close_delay / 10;
833 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
834 ASYNC_CLOSING_WAIT_NONE :
835 acm->port.closing_wait / 10;
836
837 if (copy_to_user(info, &tmp, sizeof(tmp)))
838 return -EFAULT;
839 else
840 return 0;
841 }
842
set_serial_info(struct acm * acm,struct serial_struct __user * newinfo)843 static int set_serial_info(struct acm *acm,
844 struct serial_struct __user *newinfo)
845 {
846 struct serial_struct new_serial;
847 unsigned int closing_wait, close_delay;
848 int retval = 0;
849
850 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
851 return -EFAULT;
852
853 close_delay = new_serial.close_delay * 10;
854 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
855 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
856
857 mutex_lock(&acm->port.mutex);
858
859 if (!capable(CAP_SYS_ADMIN)) {
860 if ((close_delay != acm->port.close_delay) ||
861 (closing_wait != acm->port.closing_wait))
862 retval = -EPERM;
863 else
864 retval = -EOPNOTSUPP;
865 } else {
866 acm->port.close_delay = close_delay;
867 acm->port.closing_wait = closing_wait;
868 }
869
870 mutex_unlock(&acm->port.mutex);
871 return retval;
872 }
873
wait_serial_change(struct acm * acm,unsigned long arg)874 static int wait_serial_change(struct acm *acm, unsigned long arg)
875 {
876 int rv = 0;
877 DECLARE_WAITQUEUE(wait, current);
878 struct async_icount old, new;
879
880 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
881 return -EINVAL;
882 do {
883 spin_lock_irq(&acm->read_lock);
884 old = acm->oldcount;
885 new = acm->iocount;
886 acm->oldcount = new;
887 spin_unlock_irq(&acm->read_lock);
888
889 if ((arg & TIOCM_DSR) &&
890 old.dsr != new.dsr)
891 break;
892 if ((arg & TIOCM_CD) &&
893 old.dcd != new.dcd)
894 break;
895 if ((arg & TIOCM_RI) &&
896 old.rng != new.rng)
897 break;
898
899 add_wait_queue(&acm->wioctl, &wait);
900 set_current_state(TASK_INTERRUPTIBLE);
901 schedule();
902 remove_wait_queue(&acm->wioctl, &wait);
903 if (acm->disconnected) {
904 if (arg & TIOCM_CD)
905 break;
906 else
907 rv = -ENODEV;
908 } else {
909 if (signal_pending(current))
910 rv = -ERESTARTSYS;
911 }
912 } while (!rv);
913
914
915
916 return rv;
917 }
918
get_serial_usage(struct acm * acm,struct serial_icounter_struct __user * count)919 static int get_serial_usage(struct acm *acm,
920 struct serial_icounter_struct __user *count)
921 {
922 struct serial_icounter_struct icount;
923 int rv = 0;
924
925 memset(&icount, 0, sizeof(icount));
926 icount.dsr = acm->iocount.dsr;
927 icount.rng = acm->iocount.rng;
928 icount.dcd = acm->iocount.dcd;
929 icount.frame = acm->iocount.frame;
930 icount.overrun = acm->iocount.overrun;
931 icount.parity = acm->iocount.parity;
932 icount.brk = acm->iocount.brk;
933
934 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
935 rv = -EFAULT;
936
937 return rv;
938 }
939
acm_tty_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)940 static int acm_tty_ioctl(struct tty_struct *tty,
941 unsigned int cmd, unsigned long arg)
942 {
943 struct acm *acm = tty->driver_data;
944 int rv = -ENOIOCTLCMD;
945
946 switch (cmd) {
947 case TIOCGSERIAL: /* gets serial port data */
948 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
949 break;
950 case TIOCSSERIAL:
951 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
952 break;
953 case TIOCMIWAIT:
954 rv = usb_autopm_get_interface(acm->control);
955 if (rv < 0) {
956 rv = -EIO;
957 break;
958 }
959 rv = wait_serial_change(acm, arg);
960 usb_autopm_put_interface(acm->control);
961 break;
962 case TIOCGICOUNT:
963 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
964 break;
965 }
966
967 return rv;
968 }
969
acm_tty_set_termios(struct tty_struct * tty,struct ktermios * termios_old)970 static void acm_tty_set_termios(struct tty_struct *tty,
971 struct ktermios *termios_old)
972 {
973 struct acm *acm = tty->driver_data;
974 struct ktermios *termios = &tty->termios;
975 struct usb_cdc_line_coding newline;
976 int newctrl = acm->ctrlout;
977
978 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
979 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
980 newline.bParityType = termios->c_cflag & PARENB ?
981 (termios->c_cflag & PARODD ? 1 : 2) +
982 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
983 switch (termios->c_cflag & CSIZE) {
984 case CS5:
985 newline.bDataBits = 5;
986 break;
987 case CS6:
988 newline.bDataBits = 6;
989 break;
990 case CS7:
991 newline.bDataBits = 7;
992 break;
993 case CS8:
994 default:
995 newline.bDataBits = 8;
996 break;
997 }
998 /* FIXME: Needs to clear unsupported bits in the termios */
999 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1000
1001 if (C_BAUD(tty) == B0) {
1002 newline.dwDTERate = acm->line.dwDTERate;
1003 newctrl &= ~ACM_CTRL_DTR;
1004 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1005 newctrl |= ACM_CTRL_DTR;
1006 }
1007
1008 if (newctrl != acm->ctrlout)
1009 acm_set_control(acm, acm->ctrlout = newctrl);
1010
1011 if (memcmp(&acm->line, &newline, sizeof newline)) {
1012 memcpy(&acm->line, &newline, sizeof newline);
1013 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1014 __func__,
1015 le32_to_cpu(newline.dwDTERate),
1016 newline.bCharFormat, newline.bParityType,
1017 newline.bDataBits);
1018 acm_set_line(acm, &acm->line);
1019 }
1020 }
1021
1022 static const struct tty_port_operations acm_port_ops = {
1023 .dtr_rts = acm_port_dtr_rts,
1024 .shutdown = acm_port_shutdown,
1025 .activate = acm_port_activate,
1026 .destruct = acm_port_destruct,
1027 };
1028
1029 /*
1030 * USB probe and disconnect routines.
1031 */
1032
1033 /* Little helpers: write/read buffers free */
acm_write_buffers_free(struct acm * acm)1034 static void acm_write_buffers_free(struct acm *acm)
1035 {
1036 int i;
1037 struct acm_wb *wb;
1038 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1039
1040 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1041 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1042 }
1043
acm_read_buffers_free(struct acm * acm)1044 static void acm_read_buffers_free(struct acm *acm)
1045 {
1046 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1047 int i;
1048
1049 for (i = 0; i < acm->rx_buflimit; i++)
1050 usb_free_coherent(usb_dev, acm->readsize,
1051 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1052 }
1053
1054 /* Little helper: write buffers allocate */
acm_write_buffers_alloc(struct acm * acm)1055 static int acm_write_buffers_alloc(struct acm *acm)
1056 {
1057 int i;
1058 struct acm_wb *wb;
1059
1060 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1061 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1062 &wb->dmah);
1063 if (!wb->buf) {
1064 while (i != 0) {
1065 --i;
1066 --wb;
1067 usb_free_coherent(acm->dev, acm->writesize,
1068 wb->buf, wb->dmah);
1069 }
1070 return -ENOMEM;
1071 }
1072 }
1073 return 0;
1074 }
1075
acm_probe(struct usb_interface * intf,const struct usb_device_id * id)1076 static int acm_probe(struct usb_interface *intf,
1077 const struct usb_device_id *id)
1078 {
1079 struct usb_cdc_union_desc *union_header = NULL;
1080 struct usb_cdc_country_functional_desc *cfd = NULL;
1081 unsigned char *buffer = intf->altsetting->extra;
1082 int buflen = intf->altsetting->extralen;
1083 struct usb_interface *control_interface;
1084 struct usb_interface *data_interface;
1085 struct usb_endpoint_descriptor *epctrl = NULL;
1086 struct usb_endpoint_descriptor *epread = NULL;
1087 struct usb_endpoint_descriptor *epwrite = NULL;
1088 struct usb_device *usb_dev = interface_to_usbdev(intf);
1089 struct acm *acm;
1090 int minor;
1091 int ctrlsize, readsize;
1092 u8 *buf;
1093 u8 ac_management_function = 0;
1094 u8 call_management_function = 0;
1095 int call_interface_num = -1;
1096 int data_interface_num = -1;
1097 unsigned long quirks;
1098 int num_rx_buf;
1099 int i;
1100 unsigned int elength = 0;
1101 int combined_interfaces = 0;
1102 struct device *tty_dev;
1103 int rv = -ENOMEM;
1104
1105 /* normal quirks */
1106 quirks = (unsigned long)id->driver_info;
1107
1108 if (quirks == IGNORE_DEVICE)
1109 return -ENODEV;
1110
1111 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1112
1113 /* handle quirks deadly to normal probing*/
1114 if (quirks == NO_UNION_NORMAL) {
1115 data_interface = usb_ifnum_to_if(usb_dev, 1);
1116 control_interface = usb_ifnum_to_if(usb_dev, 0);
1117 /* we would crash */
1118 if (!data_interface || !control_interface)
1119 return -ENODEV;
1120 goto skip_normal_probe;
1121 }
1122
1123 /* normal probing*/
1124 if (!buffer) {
1125 dev_err(&intf->dev, "Weird descriptor references\n");
1126 return -EINVAL;
1127 }
1128
1129 if (!buflen) {
1130 if (intf->cur_altsetting->endpoint &&
1131 intf->cur_altsetting->endpoint->extralen &&
1132 intf->cur_altsetting->endpoint->extra) {
1133 dev_dbg(&intf->dev,
1134 "Seeking extra descriptors on endpoint\n");
1135 buflen = intf->cur_altsetting->endpoint->extralen;
1136 buffer = intf->cur_altsetting->endpoint->extra;
1137 } else {
1138 dev_err(&intf->dev,
1139 "Zero length descriptor references\n");
1140 return -EINVAL;
1141 }
1142 }
1143
1144 while (buflen > 0) {
1145 elength = buffer[0];
1146 if (!elength) {
1147 dev_err(&intf->dev, "skipping garbage byte\n");
1148 elength = 1;
1149 goto next_desc;
1150 }
1151 if (buffer[1] != USB_DT_CS_INTERFACE) {
1152 dev_err(&intf->dev, "skipping garbage\n");
1153 goto next_desc;
1154 }
1155
1156 switch (buffer[2]) {
1157 case USB_CDC_UNION_TYPE: /* we've found it */
1158 if (elength < sizeof(struct usb_cdc_union_desc))
1159 goto next_desc;
1160 if (union_header) {
1161 dev_err(&intf->dev, "More than one "
1162 "union descriptor, skipping ...\n");
1163 goto next_desc;
1164 }
1165 union_header = (struct usb_cdc_union_desc *)buffer;
1166 break;
1167 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1168 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1169 goto next_desc;
1170 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1171 break;
1172 case USB_CDC_HEADER_TYPE: /* maybe check version */
1173 break; /* for now we ignore it */
1174 case USB_CDC_ACM_TYPE:
1175 if (elength < 4)
1176 goto next_desc;
1177 ac_management_function = buffer[3];
1178 break;
1179 case USB_CDC_CALL_MANAGEMENT_TYPE:
1180 if (elength < 5)
1181 goto next_desc;
1182 call_management_function = buffer[3];
1183 call_interface_num = buffer[4];
1184 break;
1185 default:
1186 /*
1187 * there are LOTS more CDC descriptors that
1188 * could legitimately be found here.
1189 */
1190 dev_dbg(&intf->dev, "Ignoring descriptor: "
1191 "type %02x, length %ud\n",
1192 buffer[2], elength);
1193 break;
1194 }
1195 next_desc:
1196 buflen -= elength;
1197 buffer += elength;
1198 }
1199
1200 if (!union_header) {
1201 if (call_interface_num > 0) {
1202 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1203 /* quirks for Droids MuIn LCD */
1204 if (quirks & NO_DATA_INTERFACE)
1205 data_interface = usb_ifnum_to_if(usb_dev, 0);
1206 else
1207 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1208 control_interface = intf;
1209 } else {
1210 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1211 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1212 return -ENODEV;
1213 } else {
1214 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1215 combined_interfaces = 1;
1216 control_interface = data_interface = intf;
1217 goto look_for_collapsed_interface;
1218 }
1219 }
1220 } else {
1221 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1222 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1223 }
1224
1225 if (!control_interface || !data_interface) {
1226 dev_dbg(&intf->dev, "no interfaces\n");
1227 return -ENODEV;
1228 }
1229
1230 if (data_interface_num != call_interface_num)
1231 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1232
1233 if (control_interface == data_interface) {
1234 /* some broken devices designed for windows work this way */
1235 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1236 combined_interfaces = 1;
1237 /* a popular other OS doesn't use it */
1238 quirks |= NO_CAP_LINE;
1239 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1240 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1241 return -EINVAL;
1242 }
1243 look_for_collapsed_interface:
1244 for (i = 0; i < 3; i++) {
1245 struct usb_endpoint_descriptor *ep;
1246 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1247
1248 if (usb_endpoint_is_int_in(ep))
1249 epctrl = ep;
1250 else if (usb_endpoint_is_bulk_out(ep))
1251 epwrite = ep;
1252 else if (usb_endpoint_is_bulk_in(ep))
1253 epread = ep;
1254 else
1255 return -EINVAL;
1256 }
1257 if (!epctrl || !epread || !epwrite)
1258 return -ENODEV;
1259 else
1260 goto made_compressed_probe;
1261 }
1262
1263 skip_normal_probe:
1264
1265 /*workaround for switched interfaces */
1266 if (data_interface->cur_altsetting->desc.bInterfaceClass
1267 != CDC_DATA_INTERFACE_TYPE) {
1268 if (control_interface->cur_altsetting->desc.bInterfaceClass
1269 == CDC_DATA_INTERFACE_TYPE) {
1270 dev_dbg(&intf->dev,
1271 "Your device has switched interfaces.\n");
1272 swap(control_interface, data_interface);
1273 } else {
1274 return -EINVAL;
1275 }
1276 }
1277
1278 /* Accept probe requests only for the control interface */
1279 if (!combined_interfaces && intf != control_interface)
1280 return -ENODEV;
1281
1282 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1283 /* valid in this context */
1284 dev_dbg(&intf->dev, "The data interface isn't available\n");
1285 return -EBUSY;
1286 }
1287
1288
1289 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1290 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1291 return -EINVAL;
1292
1293 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1294 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1295 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1296
1297
1298 /* workaround for switched endpoints */
1299 if (!usb_endpoint_dir_in(epread)) {
1300 /* descriptors are swapped */
1301 dev_dbg(&intf->dev,
1302 "The data interface has switched endpoints\n");
1303 swap(epread, epwrite);
1304 }
1305 made_compressed_probe:
1306 dev_dbg(&intf->dev, "interfaces are valid\n");
1307
1308 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1309 if (acm == NULL)
1310 goto alloc_fail;
1311
1312 minor = acm_alloc_minor(acm);
1313 if (minor < 0) {
1314 dev_err(&intf->dev, "no more free acm devices\n");
1315 kfree(acm);
1316 return -ENODEV;
1317 }
1318
1319 ctrlsize = usb_endpoint_maxp(epctrl);
1320 readsize = usb_endpoint_maxp(epread) *
1321 (quirks == SINGLE_RX_URB ? 1 : 2);
1322 acm->combined_interfaces = combined_interfaces;
1323 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1324 acm->control = control_interface;
1325 acm->data = data_interface;
1326 acm->minor = minor;
1327 acm->dev = usb_dev;
1328 acm->ctrl_caps = ac_management_function;
1329 if (quirks & NO_CAP_LINE)
1330 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1331 acm->ctrlsize = ctrlsize;
1332 acm->readsize = readsize;
1333 acm->rx_buflimit = num_rx_buf;
1334 INIT_WORK(&acm->work, acm_softint);
1335 init_waitqueue_head(&acm->wioctl);
1336 spin_lock_init(&acm->write_lock);
1337 spin_lock_init(&acm->read_lock);
1338 mutex_init(&acm->mutex);
1339 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1340 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1341 if (acm->is_int_ep)
1342 acm->bInterval = epread->bInterval;
1343 tty_port_init(&acm->port);
1344 acm->port.ops = &acm_port_ops;
1345 init_usb_anchor(&acm->delayed);
1346 acm->quirks = quirks;
1347
1348 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1349 if (!buf)
1350 goto alloc_fail2;
1351 acm->ctrl_buffer = buf;
1352
1353 if (acm_write_buffers_alloc(acm) < 0)
1354 goto alloc_fail4;
1355
1356 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1357 if (!acm->ctrlurb)
1358 goto alloc_fail5;
1359
1360 for (i = 0; i < num_rx_buf; i++) {
1361 struct acm_rb *rb = &(acm->read_buffers[i]);
1362 struct urb *urb;
1363
1364 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1365 &rb->dma);
1366 if (!rb->base)
1367 goto alloc_fail6;
1368 rb->index = i;
1369 rb->instance = acm;
1370
1371 urb = usb_alloc_urb(0, GFP_KERNEL);
1372 if (!urb)
1373 goto alloc_fail6;
1374
1375 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1376 urb->transfer_dma = rb->dma;
1377 if (acm->is_int_ep) {
1378 usb_fill_int_urb(urb, acm->dev,
1379 acm->rx_endpoint,
1380 rb->base,
1381 acm->readsize,
1382 acm_read_bulk_callback, rb,
1383 acm->bInterval);
1384 } else {
1385 usb_fill_bulk_urb(urb, acm->dev,
1386 acm->rx_endpoint,
1387 rb->base,
1388 acm->readsize,
1389 acm_read_bulk_callback, rb);
1390 }
1391
1392 acm->read_urbs[i] = urb;
1393 __set_bit(i, &acm->read_urbs_free);
1394 }
1395 for (i = 0; i < ACM_NW; i++) {
1396 struct acm_wb *snd = &(acm->wb[i]);
1397
1398 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1399 if (snd->urb == NULL)
1400 goto alloc_fail7;
1401
1402 if (usb_endpoint_xfer_int(epwrite))
1403 usb_fill_int_urb(snd->urb, usb_dev,
1404 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1405 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1406 else
1407 usb_fill_bulk_urb(snd->urb, usb_dev,
1408 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1409 NULL, acm->writesize, acm_write_bulk, snd);
1410 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1411 if (quirks & SEND_ZERO_PACKET)
1412 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1413 snd->instance = acm;
1414 }
1415
1416 usb_set_intfdata(intf, acm);
1417
1418 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1419 if (i < 0)
1420 goto alloc_fail7;
1421
1422 if (cfd) { /* export the country data */
1423 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1424 if (!acm->country_codes)
1425 goto skip_countries;
1426 acm->country_code_size = cfd->bLength - 4;
1427 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1428 cfd->bLength - 4);
1429 acm->country_rel_date = cfd->iCountryCodeRelDate;
1430
1431 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1432 if (i < 0) {
1433 kfree(acm->country_codes);
1434 acm->country_codes = NULL;
1435 acm->country_code_size = 0;
1436 goto skip_countries;
1437 }
1438
1439 i = device_create_file(&intf->dev,
1440 &dev_attr_iCountryCodeRelDate);
1441 if (i < 0) {
1442 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1443 kfree(acm->country_codes);
1444 acm->country_codes = NULL;
1445 acm->country_code_size = 0;
1446 goto skip_countries;
1447 }
1448 }
1449
1450 skip_countries:
1451 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1452 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1453 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1454 /* works around buggy devices */
1455 epctrl->bInterval ? epctrl->bInterval : 16);
1456 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1457 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1458
1459 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1460
1461 acm->line.dwDTERate = cpu_to_le32(9600);
1462 acm->line.bDataBits = 8;
1463 acm_set_line(acm, &acm->line);
1464
1465 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1466 usb_set_intfdata(data_interface, acm);
1467
1468 usb_get_intf(control_interface);
1469 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1470 &control_interface->dev);
1471 if (IS_ERR(tty_dev)) {
1472 rv = PTR_ERR(tty_dev);
1473 goto alloc_fail8;
1474 }
1475
1476 if (quirks & CLEAR_HALT_CONDITIONS) {
1477 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1478 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1479 }
1480
1481 return 0;
1482 alloc_fail8:
1483 if (acm->country_codes) {
1484 device_remove_file(&acm->control->dev,
1485 &dev_attr_wCountryCodes);
1486 device_remove_file(&acm->control->dev,
1487 &dev_attr_iCountryCodeRelDate);
1488 kfree(acm->country_codes);
1489 }
1490 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1491 alloc_fail7:
1492 usb_set_intfdata(intf, NULL);
1493 for (i = 0; i < ACM_NW; i++)
1494 usb_free_urb(acm->wb[i].urb);
1495 alloc_fail6:
1496 for (i = 0; i < num_rx_buf; i++)
1497 usb_free_urb(acm->read_urbs[i]);
1498 acm_read_buffers_free(acm);
1499 usb_free_urb(acm->ctrlurb);
1500 alloc_fail5:
1501 acm_write_buffers_free(acm);
1502 alloc_fail4:
1503 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1504 alloc_fail2:
1505 acm_release_minor(acm);
1506 kfree(acm);
1507 alloc_fail:
1508 return rv;
1509 }
1510
stop_data_traffic(struct acm * acm)1511 static void stop_data_traffic(struct acm *acm)
1512 {
1513 int i;
1514
1515 dev_dbg(&acm->control->dev, "%s\n", __func__);
1516
1517 usb_kill_urb(acm->ctrlurb);
1518 for (i = 0; i < ACM_NW; i++)
1519 usb_kill_urb(acm->wb[i].urb);
1520 for (i = 0; i < acm->rx_buflimit; i++)
1521 usb_kill_urb(acm->read_urbs[i]);
1522
1523 cancel_work_sync(&acm->work);
1524 }
1525
acm_disconnect(struct usb_interface * intf)1526 static void acm_disconnect(struct usb_interface *intf)
1527 {
1528 struct acm *acm = usb_get_intfdata(intf);
1529 struct usb_device *usb_dev = interface_to_usbdev(intf);
1530 struct tty_struct *tty;
1531 int i;
1532
1533 dev_dbg(&intf->dev, "%s\n", __func__);
1534
1535 /* sibling interface is already cleaning up */
1536 if (!acm)
1537 return;
1538
1539 mutex_lock(&acm->mutex);
1540 acm->disconnected = true;
1541 if (acm->country_codes) {
1542 device_remove_file(&acm->control->dev,
1543 &dev_attr_wCountryCodes);
1544 device_remove_file(&acm->control->dev,
1545 &dev_attr_iCountryCodeRelDate);
1546 }
1547 wake_up_all(&acm->wioctl);
1548 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1549 usb_set_intfdata(acm->control, NULL);
1550 usb_set_intfdata(acm->data, NULL);
1551 mutex_unlock(&acm->mutex);
1552
1553 tty = tty_port_tty_get(&acm->port);
1554 if (tty) {
1555 tty_vhangup(tty);
1556 tty_kref_put(tty);
1557 }
1558
1559 stop_data_traffic(acm);
1560
1561 tty_unregister_device(acm_tty_driver, acm->minor);
1562
1563 usb_free_urb(acm->ctrlurb);
1564 for (i = 0; i < ACM_NW; i++)
1565 usb_free_urb(acm->wb[i].urb);
1566 for (i = 0; i < acm->rx_buflimit; i++)
1567 usb_free_urb(acm->read_urbs[i]);
1568 acm_write_buffers_free(acm);
1569 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1570 acm_read_buffers_free(acm);
1571
1572 if (!acm->combined_interfaces)
1573 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1574 acm->data : acm->control);
1575
1576 tty_port_put(&acm->port);
1577 }
1578
1579 #ifdef CONFIG_PM
acm_suspend(struct usb_interface * intf,pm_message_t message)1580 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1581 {
1582 struct acm *acm = usb_get_intfdata(intf);
1583 int cnt;
1584
1585 spin_lock_irq(&acm->write_lock);
1586 if (PMSG_IS_AUTO(message)) {
1587 if (acm->transmitting) {
1588 spin_unlock_irq(&acm->write_lock);
1589 return -EBUSY;
1590 }
1591 }
1592 cnt = acm->susp_count++;
1593 spin_unlock_irq(&acm->write_lock);
1594
1595 if (cnt)
1596 return 0;
1597
1598 stop_data_traffic(acm);
1599
1600 return 0;
1601 }
1602
acm_resume(struct usb_interface * intf)1603 static int acm_resume(struct usb_interface *intf)
1604 {
1605 struct acm *acm = usb_get_intfdata(intf);
1606 struct urb *urb;
1607 int rv = 0;
1608
1609 spin_lock_irq(&acm->write_lock);
1610
1611 if (--acm->susp_count)
1612 goto out;
1613
1614 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1615 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1616
1617 for (;;) {
1618 urb = usb_get_from_anchor(&acm->delayed);
1619 if (!urb)
1620 break;
1621
1622 acm_start_wb(acm, urb->context);
1623 }
1624
1625 /*
1626 * delayed error checking because we must
1627 * do the write path at all cost
1628 */
1629 if (rv < 0)
1630 goto out;
1631
1632 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1633 }
1634 out:
1635 spin_unlock_irq(&acm->write_lock);
1636
1637 return rv;
1638 }
1639
acm_reset_resume(struct usb_interface * intf)1640 static int acm_reset_resume(struct usb_interface *intf)
1641 {
1642 struct acm *acm = usb_get_intfdata(intf);
1643
1644 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1645 tty_port_tty_hangup(&acm->port, false);
1646
1647 return acm_resume(intf);
1648 }
1649
1650 #endif /* CONFIG_PM */
1651
1652 #define NOKIA_PCSUITE_ACM_INFO(x) \
1653 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1654 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1655 USB_CDC_ACM_PROTO_VENDOR)
1656
1657 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1658 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1659 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1660 USB_CDC_ACM_PROTO_VENDOR)
1661
1662 /*
1663 * USB driver structure.
1664 */
1665
1666 static const struct usb_device_id acm_ids[] = {
1667 /* quirky and broken devices */
1668 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1669 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1670 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1671 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1672 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1674 },
1675 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1676 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1677 },
1678 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1680 },
1681 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1683 },
1684 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1685 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1686 },
1687 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1688 .driver_info = SINGLE_RX_URB,
1689 },
1690 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1691 .driver_info = SINGLE_RX_URB, /* firmware bug */
1692 },
1693 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1694 .driver_info = SINGLE_RX_URB, /* firmware bug */
1695 },
1696 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1698 },
1699 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1701 },
1702 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1704 },
1705 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1707 },
1708 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1709 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1710 },
1711 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1712 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1713 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1714 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1715 },
1716 /* Motorola H24 HSPA module: */
1717 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1718 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1720 },
1721 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1723 },
1724 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1725 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1726 },
1727 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1728 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1729 },
1730 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1731 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1732 },
1733 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1734 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1735 },
1736 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1737 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1738 },
1739
1740 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1741 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1742 data interface instead of
1743 communications interface.
1744 Maybe we should define a new
1745 quirk for this. */
1746 },
1747 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1748 .driver_info = NO_UNION_NORMAL,
1749 },
1750 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1751 .driver_info = NO_UNION_NORMAL,
1752 },
1753 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1754 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1755 },
1756 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1757 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1758 },
1759
1760 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1761 .driver_info = CLEAR_HALT_CONDITIONS,
1762 },
1763
1764 /* Nokia S60 phones expose two ACM channels. The first is
1765 * a modem and is picked up by the standard AT-command
1766 * information below. The second is 'vendor-specific' but
1767 * is treated as a serial device at the S60 end, so we want
1768 * to expose it on Linux too. */
1769 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1771 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1775 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1784 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1787 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1789 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1790 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1791 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1792 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1793 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1801 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1802 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1805 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1810 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1811 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1812 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1813 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1816 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1820 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1821 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1822 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1826 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1827
1828 /* Support for Owen devices */
1829 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1830
1831 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1832
1833 /* Support for Droids MuIn LCD */
1834 { USB_DEVICE(0x04d8, 0x000b),
1835 .driver_info = NO_DATA_INTERFACE,
1836 },
1837
1838 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1839 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1840 .driver_info = IGNORE_DEVICE,
1841 },
1842 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1843 .driver_info = IGNORE_DEVICE,
1844 },
1845 #endif
1846
1847 /*Samsung phone in firmware update mode */
1848 { USB_DEVICE(0x04e8, 0x685d),
1849 .driver_info = IGNORE_DEVICE,
1850 },
1851
1852 /* Exclude Infineon Flash Loader utility */
1853 { USB_DEVICE(0x058b, 0x0041),
1854 .driver_info = IGNORE_DEVICE,
1855 },
1856
1857 /* control interfaces without any protocol set */
1858 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1859 USB_CDC_PROTO_NONE) },
1860
1861 /* control interfaces with various AT-command sets */
1862 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1863 USB_CDC_ACM_PROTO_AT_V25TER) },
1864 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1865 USB_CDC_ACM_PROTO_AT_PCCA101) },
1866 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1867 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1868 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1869 USB_CDC_ACM_PROTO_AT_GSM) },
1870 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1871 USB_CDC_ACM_PROTO_AT_3G) },
1872 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1873 USB_CDC_ACM_PROTO_AT_CDMA) },
1874
1875 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1876 .driver_info = SEND_ZERO_PACKET,
1877 },
1878
1879 { }
1880 };
1881
1882 MODULE_DEVICE_TABLE(usb, acm_ids);
1883
1884 static struct usb_driver acm_driver = {
1885 .name = "cdc_acm",
1886 .probe = acm_probe,
1887 .disconnect = acm_disconnect,
1888 #ifdef CONFIG_PM
1889 .suspend = acm_suspend,
1890 .resume = acm_resume,
1891 .reset_resume = acm_reset_resume,
1892 #endif
1893 .id_table = acm_ids,
1894 #ifdef CONFIG_PM
1895 .supports_autosuspend = 1,
1896 #endif
1897 .disable_hub_initiated_lpm = 1,
1898 };
1899
1900 /*
1901 * TTY driver structures.
1902 */
1903
1904 static const struct tty_operations acm_ops = {
1905 .install = acm_tty_install,
1906 .open = acm_tty_open,
1907 .close = acm_tty_close,
1908 .cleanup = acm_tty_cleanup,
1909 .hangup = acm_tty_hangup,
1910 .write = acm_tty_write,
1911 .write_room = acm_tty_write_room,
1912 .ioctl = acm_tty_ioctl,
1913 .throttle = acm_tty_throttle,
1914 .unthrottle = acm_tty_unthrottle,
1915 .chars_in_buffer = acm_tty_chars_in_buffer,
1916 .break_ctl = acm_tty_break_ctl,
1917 .set_termios = acm_tty_set_termios,
1918 .tiocmget = acm_tty_tiocmget,
1919 .tiocmset = acm_tty_tiocmset,
1920 };
1921
1922 /*
1923 * Init / exit.
1924 */
1925
acm_init(void)1926 static int __init acm_init(void)
1927 {
1928 int retval;
1929 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1930 if (!acm_tty_driver)
1931 return -ENOMEM;
1932 acm_tty_driver->driver_name = "acm",
1933 acm_tty_driver->name = "ttyACM",
1934 acm_tty_driver->major = ACM_TTY_MAJOR,
1935 acm_tty_driver->minor_start = 0,
1936 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1937 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1938 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1939 acm_tty_driver->init_termios = tty_std_termios;
1940 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1941 HUPCL | CLOCAL;
1942 tty_set_operations(acm_tty_driver, &acm_ops);
1943
1944 retval = tty_register_driver(acm_tty_driver);
1945 if (retval) {
1946 put_tty_driver(acm_tty_driver);
1947 return retval;
1948 }
1949
1950 retval = usb_register(&acm_driver);
1951 if (retval) {
1952 tty_unregister_driver(acm_tty_driver);
1953 put_tty_driver(acm_tty_driver);
1954 return retval;
1955 }
1956
1957 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1958
1959 return 0;
1960 }
1961
acm_exit(void)1962 static void __exit acm_exit(void)
1963 {
1964 usb_deregister(&acm_driver);
1965 tty_unregister_driver(acm_tty_driver);
1966 put_tty_driver(acm_tty_driver);
1967 idr_destroy(&acm_minors);
1968 }
1969
1970 module_init(acm_init);
1971 module_exit(acm_exit);
1972
1973 MODULE_AUTHOR(DRIVER_AUTHOR);
1974 MODULE_DESCRIPTION(DRIVER_DESC);
1975 MODULE_LICENSE("GPL");
1976 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
1977