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/list.h>
50
51 #include "cdc-acm.h"
52
53
54 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
55 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57 static struct usb_driver acm_driver;
58 static struct tty_driver *acm_tty_driver;
59 static struct acm *acm_table[ACM_TTY_MINORS];
60
61 static DEFINE_MUTEX(acm_table_lock);
62
63 static void acm_tty_set_termios(struct tty_struct *tty,
64 struct ktermios *termios_old);
65
66 /*
67 * acm_table accessors
68 */
69
70 /*
71 * Look up an ACM structure by index. If found and not disconnected, increment
72 * its refcount and return it with its mutex held.
73 */
acm_get_by_index(unsigned index)74 static struct acm *acm_get_by_index(unsigned index)
75 {
76 struct acm *acm;
77
78 mutex_lock(&acm_table_lock);
79 acm = acm_table[index];
80 if (acm) {
81 mutex_lock(&acm->mutex);
82 if (acm->disconnected) {
83 mutex_unlock(&acm->mutex);
84 acm = NULL;
85 } else {
86 tty_port_get(&acm->port);
87 mutex_unlock(&acm->mutex);
88 }
89 }
90 mutex_unlock(&acm_table_lock);
91 return acm;
92 }
93
94 /*
95 * Try to find an available minor number and if found, associate it with 'acm'.
96 */
acm_alloc_minor(struct acm * acm)97 static int acm_alloc_minor(struct acm *acm)
98 {
99 int minor;
100
101 mutex_lock(&acm_table_lock);
102 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
103 if (!acm_table[minor]) {
104 acm_table[minor] = acm;
105 break;
106 }
107 }
108 mutex_unlock(&acm_table_lock);
109
110 return minor;
111 }
112
113 /* Release the minor number associated with 'acm'. */
acm_release_minor(struct acm * acm)114 static void acm_release_minor(struct acm *acm)
115 {
116 mutex_lock(&acm_table_lock);
117 acm_table[acm->minor] = NULL;
118 mutex_unlock(&acm_table_lock);
119 }
120
121 /*
122 * Functions for ACM control messages.
123 */
124
acm_ctrl_msg(struct acm * acm,int request,int value,void * buf,int len)125 static int acm_ctrl_msg(struct acm *acm, int request, int value,
126 void *buf, int len)
127 {
128 int retval;
129
130 retval = usb_autopm_get_interface(acm->control);
131 if (retval)
132 return retval;
133
134 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
135 request, USB_RT_ACM, value,
136 acm->control->altsetting[0].desc.bInterfaceNumber,
137 buf, len, 5000);
138
139 dev_dbg(&acm->control->dev,
140 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
141 __func__, request, value, len, retval);
142
143 usb_autopm_put_interface(acm->control);
144
145 return retval < 0 ? retval : 0;
146 }
147
148 /* devices aren't required to support these requests.
149 * the cdc acm descriptor tells whether they do...
150 */
acm_set_control(struct acm * acm,int control)151 static inline int acm_set_control(struct acm *acm, int control)
152 {
153 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
154 return -EOPNOTSUPP;
155
156 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
157 control, NULL, 0);
158 }
159
160 #define acm_set_line(acm, line) \
161 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
162 #define acm_send_break(acm, ms) \
163 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
164
165 /*
166 * Write buffer management.
167 * All of these assume proper locks taken by the caller.
168 */
169
acm_wb_alloc(struct acm * acm)170 static int acm_wb_alloc(struct acm *acm)
171 {
172 int i, wbn;
173 struct acm_wb *wb;
174
175 wbn = 0;
176 i = 0;
177 for (;;) {
178 wb = &acm->wb[wbn];
179 if (!wb->use) {
180 wb->use = 1;
181 return wbn;
182 }
183 wbn = (wbn + 1) % ACM_NW;
184 if (++i >= ACM_NW)
185 return -1;
186 }
187 }
188
acm_wb_is_avail(struct acm * acm)189 static int acm_wb_is_avail(struct acm *acm)
190 {
191 int i, n;
192 unsigned long flags;
193
194 n = ACM_NW;
195 spin_lock_irqsave(&acm->write_lock, flags);
196 for (i = 0; i < ACM_NW; i++)
197 n -= acm->wb[i].use;
198 spin_unlock_irqrestore(&acm->write_lock, flags);
199 return n;
200 }
201
202 /*
203 * Finish write. Caller must hold acm->write_lock
204 */
acm_write_done(struct acm * acm,struct acm_wb * wb)205 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
206 {
207 wb->use = 0;
208 acm->transmitting--;
209 usb_autopm_put_interface_async(acm->control);
210 }
211
212 /*
213 * Poke write.
214 *
215 * the caller is responsible for locking
216 */
217
acm_start_wb(struct acm * acm,struct acm_wb * wb)218 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
219 {
220 int rc;
221
222 acm->transmitting++;
223
224 wb->urb->transfer_buffer = wb->buf;
225 wb->urb->transfer_dma = wb->dmah;
226 wb->urb->transfer_buffer_length = wb->len;
227 wb->urb->dev = acm->dev;
228
229 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
230 if (rc < 0) {
231 dev_err(&acm->data->dev,
232 "%s - usb_submit_urb(write bulk) failed: %d\n",
233 __func__, rc);
234 acm_write_done(acm, wb);
235 }
236 return rc;
237 }
238
239 /*
240 * attributes exported through sysfs
241 */
show_caps(struct device * dev,struct device_attribute * attr,char * buf)242 static ssize_t show_caps
243 (struct device *dev, struct device_attribute *attr, char *buf)
244 {
245 struct usb_interface *intf = to_usb_interface(dev);
246 struct acm *acm = usb_get_intfdata(intf);
247
248 return sprintf(buf, "%d", acm->ctrl_caps);
249 }
250 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
251
show_country_codes(struct device * dev,struct device_attribute * attr,char * buf)252 static ssize_t show_country_codes
253 (struct device *dev, struct device_attribute *attr, char *buf)
254 {
255 struct usb_interface *intf = to_usb_interface(dev);
256 struct acm *acm = usb_get_intfdata(intf);
257
258 memcpy(buf, acm->country_codes, acm->country_code_size);
259 return acm->country_code_size;
260 }
261
262 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
263
show_country_rel_date(struct device * dev,struct device_attribute * attr,char * buf)264 static ssize_t show_country_rel_date
265 (struct device *dev, struct device_attribute *attr, char *buf)
266 {
267 struct usb_interface *intf = to_usb_interface(dev);
268 struct acm *acm = usb_get_intfdata(intf);
269
270 return sprintf(buf, "%d", acm->country_rel_date);
271 }
272
273 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
274 /*
275 * Interrupt handlers for various ACM device responses
276 */
277
278 /* control interface reports status changes with "interrupt" transfers */
acm_ctrl_irq(struct urb * urb)279 static void acm_ctrl_irq(struct urb *urb)
280 {
281 struct acm *acm = urb->context;
282 struct usb_cdc_notification *dr = urb->transfer_buffer;
283 unsigned char *data;
284 int newctrl;
285 int difference;
286 int retval;
287 int status = urb->status;
288
289 switch (status) {
290 case 0:
291 /* success */
292 break;
293 case -ECONNRESET:
294 case -ENOENT:
295 case -ESHUTDOWN:
296 /* this urb is terminated, clean up */
297 dev_dbg(&acm->control->dev,
298 "%s - urb shutting down with status: %d\n",
299 __func__, status);
300 return;
301 default:
302 dev_dbg(&acm->control->dev,
303 "%s - nonzero urb status received: %d\n",
304 __func__, status);
305 goto exit;
306 }
307
308 usb_mark_last_busy(acm->dev);
309
310 data = (unsigned char *)(dr + 1);
311 switch (dr->bNotificationType) {
312 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
313 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
314 __func__, dr->wValue);
315 break;
316
317 case USB_CDC_NOTIFY_SERIAL_STATE:
318 if (le16_to_cpu(dr->wLength) != 2) {
319 dev_dbg(&acm->control->dev,
320 "%s - malformed serial state\n", __func__);
321 break;
322 }
323
324 newctrl = get_unaligned_le16(data);
325
326 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
327 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
328 __func__);
329 tty_port_tty_hangup(&acm->port, false);
330 }
331
332 difference = acm->ctrlin ^ newctrl;
333 spin_lock(&acm->read_lock);
334 acm->ctrlin = newctrl;
335 acm->oldcount = acm->iocount;
336
337 if (difference & ACM_CTRL_DSR)
338 acm->iocount.dsr++;
339 if (difference & ACM_CTRL_BRK)
340 acm->iocount.brk++;
341 if (difference & ACM_CTRL_RI)
342 acm->iocount.rng++;
343 if (difference & ACM_CTRL_DCD)
344 acm->iocount.dcd++;
345 if (difference & ACM_CTRL_FRAMING)
346 acm->iocount.frame++;
347 if (difference & ACM_CTRL_PARITY)
348 acm->iocount.parity++;
349 if (difference & ACM_CTRL_OVERRUN)
350 acm->iocount.overrun++;
351 spin_unlock(&acm->read_lock);
352
353 if (difference)
354 wake_up_all(&acm->wioctl);
355
356 break;
357
358 default:
359 dev_dbg(&acm->control->dev,
360 "%s - unknown notification %d received: index %d len %d\n",
361 __func__,
362 dr->bNotificationType, dr->wIndex, dr->wLength);
363
364 break;
365 }
366 exit:
367 retval = usb_submit_urb(urb, GFP_ATOMIC);
368 if (retval)
369 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
370 __func__, retval);
371 }
372
acm_submit_read_urb(struct acm * acm,int index,gfp_t mem_flags)373 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
374 {
375 int res;
376
377 if (!test_and_clear_bit(index, &acm->read_urbs_free))
378 return 0;
379
380 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
381
382 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
383 if (res) {
384 if (res != -EPERM && res != -ENODEV) {
385 dev_err(&acm->data->dev,
386 "%s - usb_submit_urb failed: %d\n",
387 __func__, res);
388 }
389 set_bit(index, &acm->read_urbs_free);
390 return res;
391 }
392
393 return 0;
394 }
395
acm_submit_read_urbs(struct acm * acm,gfp_t mem_flags)396 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
397 {
398 int res;
399 int i;
400
401 for (i = 0; i < acm->rx_buflimit; ++i) {
402 res = acm_submit_read_urb(acm, i, mem_flags);
403 if (res)
404 return res;
405 }
406
407 return 0;
408 }
409
acm_process_read_urb(struct acm * acm,struct urb * urb)410 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
411 {
412 if (!urb->actual_length)
413 return;
414
415 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
416 urb->actual_length);
417 tty_flip_buffer_push(&acm->port);
418 }
419
acm_read_bulk_callback(struct urb * urb)420 static void acm_read_bulk_callback(struct urb *urb)
421 {
422 struct acm_rb *rb = urb->context;
423 struct acm *acm = rb->instance;
424 unsigned long flags;
425
426 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
427 rb->index, urb->actual_length);
428 set_bit(rb->index, &acm->read_urbs_free);
429
430 if (!acm->dev) {
431 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
432 return;
433 }
434
435 if (urb->status) {
436 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
437 __func__, urb->status);
438 if ((urb->status != -ENOENT) || (urb->actual_length == 0))
439 return;
440 }
441
442 usb_mark_last_busy(acm->dev);
443
444 acm_process_read_urb(acm, urb);
445
446 /* throttle device if requested by tty */
447 spin_lock_irqsave(&acm->read_lock, flags);
448 acm->throttled = acm->throttle_req;
449 if (!acm->throttled) {
450 spin_unlock_irqrestore(&acm->read_lock, flags);
451 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
452 } else {
453 spin_unlock_irqrestore(&acm->read_lock, flags);
454 }
455 }
456
457 /* data interface wrote those outgoing bytes */
acm_write_bulk(struct urb * urb)458 static void acm_write_bulk(struct urb *urb)
459 {
460 struct acm_wb *wb = urb->context;
461 struct acm *acm = wb->instance;
462 unsigned long flags;
463
464 if (urb->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 urb->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_index(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 do {
881 spin_lock_irq(&acm->read_lock);
882 old = acm->oldcount;
883 new = acm->iocount;
884 acm->oldcount = new;
885 spin_unlock_irq(&acm->read_lock);
886
887 if ((arg & TIOCM_DSR) &&
888 old.dsr != new.dsr)
889 break;
890 if ((arg & TIOCM_CD) &&
891 old.dcd != new.dcd)
892 break;
893 if ((arg & TIOCM_RI) &&
894 old.rng != new.rng)
895 break;
896
897 add_wait_queue(&acm->wioctl, &wait);
898 set_current_state(TASK_INTERRUPTIBLE);
899 schedule();
900 remove_wait_queue(&acm->wioctl, &wait);
901 if (acm->disconnected) {
902 if (arg & TIOCM_CD)
903 break;
904 else
905 rv = -ENODEV;
906 } else {
907 if (signal_pending(current))
908 rv = -ERESTARTSYS;
909 }
910 } while (!rv);
911
912
913
914 return rv;
915 }
916
get_serial_usage(struct acm * acm,struct serial_icounter_struct __user * count)917 static int get_serial_usage(struct acm *acm,
918 struct serial_icounter_struct __user *count)
919 {
920 struct serial_icounter_struct icount;
921 int rv = 0;
922
923 memset(&icount, 0, sizeof(icount));
924 icount.dsr = acm->iocount.dsr;
925 icount.rng = acm->iocount.rng;
926 icount.dcd = acm->iocount.dcd;
927 icount.frame = acm->iocount.frame;
928 icount.overrun = acm->iocount.overrun;
929 icount.parity = acm->iocount.parity;
930 icount.brk = acm->iocount.brk;
931
932 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
933 rv = -EFAULT;
934
935 return rv;
936 }
937
acm_tty_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)938 static int acm_tty_ioctl(struct tty_struct *tty,
939 unsigned int cmd, unsigned long arg)
940 {
941 struct acm *acm = tty->driver_data;
942 int rv = -ENOIOCTLCMD;
943
944 switch (cmd) {
945 case TIOCGSERIAL: /* gets serial port data */
946 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
947 break;
948 case TIOCSSERIAL:
949 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
950 break;
951 case TIOCMIWAIT:
952 rv = usb_autopm_get_interface(acm->control);
953 if (rv < 0) {
954 rv = -EIO;
955 break;
956 }
957 rv = wait_serial_change(acm, arg);
958 usb_autopm_put_interface(acm->control);
959 break;
960 case TIOCGICOUNT:
961 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
962 break;
963 }
964
965 return rv;
966 }
967
acm_tty_set_termios(struct tty_struct * tty,struct ktermios * termios_old)968 static void acm_tty_set_termios(struct tty_struct *tty,
969 struct ktermios *termios_old)
970 {
971 struct acm *acm = tty->driver_data;
972 struct ktermios *termios = &tty->termios;
973 struct usb_cdc_line_coding newline;
974 int newctrl = acm->ctrlout;
975
976 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
977 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
978 newline.bParityType = termios->c_cflag & PARENB ?
979 (termios->c_cflag & PARODD ? 1 : 2) +
980 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
981 switch (termios->c_cflag & CSIZE) {
982 case CS5:
983 newline.bDataBits = 5;
984 break;
985 case CS6:
986 newline.bDataBits = 6;
987 break;
988 case CS7:
989 newline.bDataBits = 7;
990 break;
991 case CS8:
992 default:
993 newline.bDataBits = 8;
994 break;
995 }
996 /* FIXME: Needs to clear unsupported bits in the termios */
997 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
998
999 if (C_BAUD(tty) == B0) {
1000 newline.dwDTERate = acm->line.dwDTERate;
1001 newctrl &= ~ACM_CTRL_DTR;
1002 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1003 newctrl |= ACM_CTRL_DTR;
1004 }
1005
1006 if (newctrl != acm->ctrlout)
1007 acm_set_control(acm, acm->ctrlout = newctrl);
1008
1009 if (memcmp(&acm->line, &newline, sizeof newline)) {
1010 memcpy(&acm->line, &newline, sizeof newline);
1011 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1012 __func__,
1013 le32_to_cpu(newline.dwDTERate),
1014 newline.bCharFormat, newline.bParityType,
1015 newline.bDataBits);
1016 acm_set_line(acm, &acm->line);
1017 }
1018 }
1019
1020 static const struct tty_port_operations acm_port_ops = {
1021 .dtr_rts = acm_port_dtr_rts,
1022 .shutdown = acm_port_shutdown,
1023 .activate = acm_port_activate,
1024 .destruct = acm_port_destruct,
1025 };
1026
1027 /*
1028 * USB probe and disconnect routines.
1029 */
1030
1031 /* Little helpers: write/read buffers free */
acm_write_buffers_free(struct acm * acm)1032 static void acm_write_buffers_free(struct acm *acm)
1033 {
1034 int i;
1035 struct acm_wb *wb;
1036 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1037
1038 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1039 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1040 }
1041
acm_read_buffers_free(struct acm * acm)1042 static void acm_read_buffers_free(struct acm *acm)
1043 {
1044 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1045 int i;
1046
1047 for (i = 0; i < acm->rx_buflimit; i++)
1048 usb_free_coherent(usb_dev, acm->readsize,
1049 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1050 }
1051
1052 /* Little helper: write buffers allocate */
acm_write_buffers_alloc(struct acm * acm)1053 static int acm_write_buffers_alloc(struct acm *acm)
1054 {
1055 int i;
1056 struct acm_wb *wb;
1057
1058 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1059 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1060 &wb->dmah);
1061 if (!wb->buf) {
1062 while (i != 0) {
1063 --i;
1064 --wb;
1065 usb_free_coherent(acm->dev, acm->writesize,
1066 wb->buf, wb->dmah);
1067 }
1068 return -ENOMEM;
1069 }
1070 }
1071 return 0;
1072 }
1073
acm_probe(struct usb_interface * intf,const struct usb_device_id * id)1074 static int acm_probe(struct usb_interface *intf,
1075 const struct usb_device_id *id)
1076 {
1077 struct usb_cdc_union_desc *union_header = NULL;
1078 struct usb_cdc_country_functional_desc *cfd = NULL;
1079 unsigned char *buffer = intf->altsetting->extra;
1080 int buflen = intf->altsetting->extralen;
1081 struct usb_interface *control_interface;
1082 struct usb_interface *data_interface;
1083 struct usb_endpoint_descriptor *epctrl = NULL;
1084 struct usb_endpoint_descriptor *epread = NULL;
1085 struct usb_endpoint_descriptor *epwrite = NULL;
1086 struct usb_device *usb_dev = interface_to_usbdev(intf);
1087 struct acm *acm;
1088 int minor;
1089 int ctrlsize, readsize;
1090 u8 *buf;
1091 u8 ac_management_function = 0;
1092 u8 call_management_function = 0;
1093 int call_interface_num = -1;
1094 int data_interface_num = -1;
1095 unsigned long quirks;
1096 int num_rx_buf;
1097 int i;
1098 unsigned int elength = 0;
1099 int combined_interfaces = 0;
1100 struct device *tty_dev;
1101 int rv = -ENOMEM;
1102
1103 /* normal quirks */
1104 quirks = (unsigned long)id->driver_info;
1105
1106 if (quirks == IGNORE_DEVICE)
1107 return -ENODEV;
1108
1109 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1110
1111 /* handle quirks deadly to normal probing*/
1112 if (quirks == NO_UNION_NORMAL) {
1113 data_interface = usb_ifnum_to_if(usb_dev, 1);
1114 control_interface = usb_ifnum_to_if(usb_dev, 0);
1115 /* we would crash */
1116 if (!data_interface || !control_interface)
1117 return -ENODEV;
1118 goto skip_normal_probe;
1119 }
1120
1121 /* normal probing*/
1122 if (!buffer) {
1123 dev_err(&intf->dev, "Weird descriptor references\n");
1124 return -EINVAL;
1125 }
1126
1127 if (!buflen) {
1128 if (intf->cur_altsetting->endpoint &&
1129 intf->cur_altsetting->endpoint->extralen &&
1130 intf->cur_altsetting->endpoint->extra) {
1131 dev_dbg(&intf->dev,
1132 "Seeking extra descriptors on endpoint\n");
1133 buflen = intf->cur_altsetting->endpoint->extralen;
1134 buffer = intf->cur_altsetting->endpoint->extra;
1135 } else {
1136 dev_err(&intf->dev,
1137 "Zero length descriptor references\n");
1138 return -EINVAL;
1139 }
1140 }
1141
1142 while (buflen >= 3) { /* minimum length making sense */
1143 elength = buffer[0];
1144 if (!elength) {
1145 dev_err(&intf->dev, "skipping garbage byte\n");
1146 elength = 1;
1147 goto next_desc;
1148 }
1149 if (buffer[1] != USB_DT_CS_INTERFACE) {
1150 dev_err(&intf->dev, "skipping garbage\n");
1151 goto next_desc;
1152 }
1153 elength = buffer[0];
1154
1155 switch (buffer[2]) {
1156 case USB_CDC_UNION_TYPE: /* we've found it */
1157 if (elength < sizeof(struct usb_cdc_union_desc))
1158 goto next_desc;
1159 if (union_header) {
1160 dev_err(&intf->dev, "More than one "
1161 "union descriptor, skipping ...\n");
1162 goto next_desc;
1163 }
1164 union_header = (struct usb_cdc_union_desc *)buffer;
1165 break;
1166 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1167 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1168 goto next_desc;
1169 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1170 break;
1171 case USB_CDC_HEADER_TYPE: /* maybe check version */
1172 break; /* for now we ignore it */
1173 case USB_CDC_ACM_TYPE:
1174 if (elength < 4)
1175 goto next_desc;
1176 ac_management_function = buffer[3];
1177 break;
1178 case USB_CDC_CALL_MANAGEMENT_TYPE:
1179 if (elength < 5)
1180 goto next_desc;
1181 call_management_function = buffer[3];
1182 call_interface_num = buffer[4];
1183 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1184 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1185 break;
1186 default:
1187 /*
1188 * there are LOTS more CDC descriptors that
1189 * could legitimately be found here.
1190 */
1191 dev_dbg(&intf->dev, "Ignoring descriptor: "
1192 "type %02x, length %ud\n",
1193 buffer[2], elength);
1194 break;
1195 }
1196 next_desc:
1197 buflen -= elength;
1198 buffer += elength;
1199 }
1200
1201 if (!union_header) {
1202 if (call_interface_num > 0) {
1203 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1204 /* quirks for Droids MuIn LCD */
1205 if (quirks & NO_DATA_INTERFACE)
1206 data_interface = usb_ifnum_to_if(usb_dev, 0);
1207 else
1208 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1209 control_interface = intf;
1210 } else {
1211 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1212 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1213 return -ENODEV;
1214 } else {
1215 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1216 combined_interfaces = 1;
1217 control_interface = data_interface = intf;
1218 goto look_for_collapsed_interface;
1219 }
1220 }
1221 } else {
1222 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1223 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1224 }
1225
1226 if (!control_interface || !data_interface) {
1227 dev_dbg(&intf->dev, "no interfaces\n");
1228 return -ENODEV;
1229 }
1230
1231 if (data_interface_num != call_interface_num)
1232 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1233
1234 if (control_interface == data_interface) {
1235 /* some broken devices designed for windows work this way */
1236 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1237 combined_interfaces = 1;
1238 /* a popular other OS doesn't use it */
1239 quirks |= NO_CAP_LINE;
1240 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1241 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1242 return -EINVAL;
1243 }
1244 look_for_collapsed_interface:
1245 for (i = 0; i < 3; i++) {
1246 struct usb_endpoint_descriptor *ep;
1247 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1248
1249 if (usb_endpoint_is_int_in(ep))
1250 epctrl = ep;
1251 else if (usb_endpoint_is_bulk_out(ep))
1252 epwrite = ep;
1253 else if (usb_endpoint_is_bulk_in(ep))
1254 epread = ep;
1255 else
1256 return -EINVAL;
1257 }
1258 if (!epctrl || !epread || !epwrite)
1259 return -ENODEV;
1260 else
1261 goto made_compressed_probe;
1262 }
1263
1264 skip_normal_probe:
1265
1266 /*workaround for switched interfaces */
1267 if (data_interface->cur_altsetting->desc.bInterfaceClass
1268 != CDC_DATA_INTERFACE_TYPE) {
1269 if (control_interface->cur_altsetting->desc.bInterfaceClass
1270 == CDC_DATA_INTERFACE_TYPE) {
1271 struct usb_interface *t;
1272 dev_dbg(&intf->dev,
1273 "Your device has switched interfaces.\n");
1274 t = control_interface;
1275 control_interface = data_interface;
1276 data_interface = t;
1277 } else {
1278 return -EINVAL;
1279 }
1280 }
1281
1282 /* Accept probe requests only for the control interface */
1283 if (!combined_interfaces && intf != control_interface)
1284 return -ENODEV;
1285
1286 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1287 /* valid in this context */
1288 dev_dbg(&intf->dev, "The data interface isn't available\n");
1289 return -EBUSY;
1290 }
1291
1292
1293 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1294 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1295 return -EINVAL;
1296
1297 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1298 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1299 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1300
1301
1302 /* workaround for switched endpoints */
1303 if (!usb_endpoint_dir_in(epread)) {
1304 /* descriptors are swapped */
1305 struct usb_endpoint_descriptor *t;
1306 dev_dbg(&intf->dev,
1307 "The data interface has switched endpoints\n");
1308 t = epread;
1309 epread = epwrite;
1310 epwrite = t;
1311 }
1312 made_compressed_probe:
1313 dev_dbg(&intf->dev, "interfaces are valid\n");
1314
1315 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1316 if (acm == NULL) {
1317 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1318 goto alloc_fail;
1319 }
1320
1321 minor = acm_alloc_minor(acm);
1322 if (minor == ACM_TTY_MINORS) {
1323 dev_err(&intf->dev, "no more free acm devices\n");
1324 kfree(acm);
1325 return -ENODEV;
1326 }
1327
1328 ctrlsize = usb_endpoint_maxp(epctrl);
1329 readsize = usb_endpoint_maxp(epread) *
1330 (quirks == SINGLE_RX_URB ? 1 : 2);
1331 acm->combined_interfaces = combined_interfaces;
1332 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1333 acm->control = control_interface;
1334 acm->data = data_interface;
1335 acm->minor = minor;
1336 acm->dev = usb_dev;
1337 acm->ctrl_caps = ac_management_function;
1338 if (quirks & NO_CAP_LINE)
1339 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1340 acm->ctrlsize = ctrlsize;
1341 acm->readsize = readsize;
1342 acm->rx_buflimit = num_rx_buf;
1343 INIT_WORK(&acm->work, acm_softint);
1344 init_waitqueue_head(&acm->wioctl);
1345 spin_lock_init(&acm->write_lock);
1346 spin_lock_init(&acm->read_lock);
1347 mutex_init(&acm->mutex);
1348 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1349 if (acm->is_int_ep)
1350 acm->bInterval = epread->bInterval;
1351 tty_port_init(&acm->port);
1352 acm->port.ops = &acm_port_ops;
1353 init_usb_anchor(&acm->delayed);
1354 acm->quirks = quirks;
1355
1356 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1357 if (!buf) {
1358 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1359 goto alloc_fail2;
1360 }
1361 acm->ctrl_buffer = buf;
1362
1363 if (acm_write_buffers_alloc(acm) < 0) {
1364 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1365 goto alloc_fail4;
1366 }
1367
1368 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1369 if (!acm->ctrlurb) {
1370 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1371 goto alloc_fail5;
1372 }
1373 for (i = 0; i < num_rx_buf; i++) {
1374 struct acm_rb *rb = &(acm->read_buffers[i]);
1375 struct urb *urb;
1376
1377 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1378 &rb->dma);
1379 if (!rb->base) {
1380 dev_err(&intf->dev, "out of memory "
1381 "(read bufs usb_alloc_coherent)\n");
1382 goto alloc_fail6;
1383 }
1384 rb->index = i;
1385 rb->instance = acm;
1386
1387 urb = usb_alloc_urb(0, GFP_KERNEL);
1388 if (!urb) {
1389 dev_err(&intf->dev,
1390 "out of memory (read urbs usb_alloc_urb)\n");
1391 goto alloc_fail6;
1392 }
1393 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1394 urb->transfer_dma = rb->dma;
1395 if (acm->is_int_ep) {
1396 usb_fill_int_urb(urb, acm->dev,
1397 usb_rcvintpipe(usb_dev, epread->bEndpointAddress),
1398 rb->base,
1399 acm->readsize,
1400 acm_read_bulk_callback, rb,
1401 acm->bInterval);
1402 } else {
1403 usb_fill_bulk_urb(urb, acm->dev,
1404 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress),
1405 rb->base,
1406 acm->readsize,
1407 acm_read_bulk_callback, rb);
1408 }
1409
1410 acm->read_urbs[i] = urb;
1411 __set_bit(i, &acm->read_urbs_free);
1412 }
1413 for (i = 0; i < ACM_NW; i++) {
1414 struct acm_wb *snd = &(acm->wb[i]);
1415
1416 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1417 if (snd->urb == NULL) {
1418 dev_err(&intf->dev,
1419 "out of memory (write urbs usb_alloc_urb)\n");
1420 goto alloc_fail7;
1421 }
1422
1423 if (usb_endpoint_xfer_int(epwrite))
1424 usb_fill_int_urb(snd->urb, usb_dev,
1425 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1426 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1427 else
1428 usb_fill_bulk_urb(snd->urb, usb_dev,
1429 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1430 NULL, acm->writesize, acm_write_bulk, snd);
1431 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1432 if (quirks & SEND_ZERO_PACKET)
1433 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1434 snd->instance = acm;
1435 }
1436
1437 usb_set_intfdata(intf, acm);
1438
1439 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1440 if (i < 0)
1441 goto alloc_fail7;
1442
1443 if (cfd) { /* export the country data */
1444 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1445 if (!acm->country_codes)
1446 goto skip_countries;
1447 acm->country_code_size = cfd->bLength - 4;
1448 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1449 cfd->bLength - 4);
1450 acm->country_rel_date = cfd->iCountryCodeRelDate;
1451
1452 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1453 if (i < 0) {
1454 kfree(acm->country_codes);
1455 acm->country_codes = NULL;
1456 acm->country_code_size = 0;
1457 goto skip_countries;
1458 }
1459
1460 i = device_create_file(&intf->dev,
1461 &dev_attr_iCountryCodeRelDate);
1462 if (i < 0) {
1463 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1464 kfree(acm->country_codes);
1465 acm->country_codes = NULL;
1466 acm->country_code_size = 0;
1467 goto skip_countries;
1468 }
1469 }
1470
1471 skip_countries:
1472 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1473 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1474 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1475 /* works around buggy devices */
1476 epctrl->bInterval ? epctrl->bInterval : 16);
1477 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1478 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1479
1480 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1481
1482 acm->line.dwDTERate = cpu_to_le32(9600);
1483 acm->line.bDataBits = 8;
1484 acm_set_line(acm, &acm->line);
1485
1486 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1487 usb_set_intfdata(data_interface, acm);
1488
1489 usb_get_intf(control_interface);
1490 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1491 &control_interface->dev);
1492 if (IS_ERR(tty_dev)) {
1493 rv = PTR_ERR(tty_dev);
1494 goto alloc_fail8;
1495 }
1496
1497 if (quirks & CLEAR_HALT_CONDITIONS) {
1498 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1499 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1500 }
1501
1502 return 0;
1503 alloc_fail8:
1504 if (acm->country_codes) {
1505 device_remove_file(&acm->control->dev,
1506 &dev_attr_wCountryCodes);
1507 device_remove_file(&acm->control->dev,
1508 &dev_attr_iCountryCodeRelDate);
1509 kfree(acm->country_codes);
1510 }
1511 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1512 alloc_fail7:
1513 usb_set_intfdata(intf, NULL);
1514 for (i = 0; i < ACM_NW; i++)
1515 usb_free_urb(acm->wb[i].urb);
1516 alloc_fail6:
1517 for (i = 0; i < num_rx_buf; i++)
1518 usb_free_urb(acm->read_urbs[i]);
1519 acm_read_buffers_free(acm);
1520 usb_free_urb(acm->ctrlurb);
1521 alloc_fail5:
1522 acm_write_buffers_free(acm);
1523 alloc_fail4:
1524 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1525 alloc_fail2:
1526 acm_release_minor(acm);
1527 kfree(acm);
1528 alloc_fail:
1529 return rv;
1530 }
1531
stop_data_traffic(struct acm * acm)1532 static void stop_data_traffic(struct acm *acm)
1533 {
1534 int i;
1535
1536 dev_dbg(&acm->control->dev, "%s\n", __func__);
1537
1538 usb_kill_urb(acm->ctrlurb);
1539 for (i = 0; i < ACM_NW; i++)
1540 usb_kill_urb(acm->wb[i].urb);
1541 for (i = 0; i < acm->rx_buflimit; i++)
1542 usb_kill_urb(acm->read_urbs[i]);
1543
1544 cancel_work_sync(&acm->work);
1545 }
1546
acm_disconnect(struct usb_interface * intf)1547 static void acm_disconnect(struct usb_interface *intf)
1548 {
1549 struct acm *acm = usb_get_intfdata(intf);
1550 struct usb_device *usb_dev = interface_to_usbdev(intf);
1551 struct tty_struct *tty;
1552 int i;
1553
1554 dev_dbg(&intf->dev, "%s\n", __func__);
1555
1556 /* sibling interface is already cleaning up */
1557 if (!acm)
1558 return;
1559
1560 mutex_lock(&acm->mutex);
1561 acm->disconnected = true;
1562 if (acm->country_codes) {
1563 device_remove_file(&acm->control->dev,
1564 &dev_attr_wCountryCodes);
1565 device_remove_file(&acm->control->dev,
1566 &dev_attr_iCountryCodeRelDate);
1567 }
1568 wake_up_all(&acm->wioctl);
1569 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1570 usb_set_intfdata(acm->control, NULL);
1571 usb_set_intfdata(acm->data, NULL);
1572 mutex_unlock(&acm->mutex);
1573
1574 tty = tty_port_tty_get(&acm->port);
1575 if (tty) {
1576 tty_vhangup(tty);
1577 tty_kref_put(tty);
1578 }
1579
1580 stop_data_traffic(acm);
1581
1582 tty_unregister_device(acm_tty_driver, acm->minor);
1583
1584 usb_free_urb(acm->ctrlurb);
1585 for (i = 0; i < ACM_NW; i++)
1586 usb_free_urb(acm->wb[i].urb);
1587 for (i = 0; i < acm->rx_buflimit; i++)
1588 usb_free_urb(acm->read_urbs[i]);
1589 acm_write_buffers_free(acm);
1590 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1591 acm_read_buffers_free(acm);
1592
1593 if (!acm->combined_interfaces)
1594 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1595 acm->data : acm->control);
1596
1597 tty_port_put(&acm->port);
1598 }
1599
1600 #ifdef CONFIG_PM
acm_suspend(struct usb_interface * intf,pm_message_t message)1601 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1602 {
1603 struct acm *acm = usb_get_intfdata(intf);
1604 int cnt;
1605
1606 spin_lock_irq(&acm->write_lock);
1607 if (PMSG_IS_AUTO(message)) {
1608 if (acm->transmitting) {
1609 spin_unlock_irq(&acm->write_lock);
1610 return -EBUSY;
1611 }
1612 }
1613 cnt = acm->susp_count++;
1614 spin_unlock_irq(&acm->write_lock);
1615
1616 if (cnt)
1617 return 0;
1618
1619 stop_data_traffic(acm);
1620
1621 return 0;
1622 }
1623
acm_resume(struct usb_interface * intf)1624 static int acm_resume(struct usb_interface *intf)
1625 {
1626 struct acm *acm = usb_get_intfdata(intf);
1627 struct urb *urb;
1628 int rv = 0;
1629
1630 spin_lock_irq(&acm->write_lock);
1631
1632 if (--acm->susp_count)
1633 goto out;
1634
1635 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1636 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1637
1638 for (;;) {
1639 urb = usb_get_from_anchor(&acm->delayed);
1640 if (!urb)
1641 break;
1642
1643 acm_start_wb(acm, urb->context);
1644 }
1645
1646 /*
1647 * delayed error checking because we must
1648 * do the write path at all cost
1649 */
1650 if (rv < 0)
1651 goto out;
1652
1653 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1654 }
1655 out:
1656 spin_unlock_irq(&acm->write_lock);
1657
1658 return rv;
1659 }
1660
acm_reset_resume(struct usb_interface * intf)1661 static int acm_reset_resume(struct usb_interface *intf)
1662 {
1663 struct acm *acm = usb_get_intfdata(intf);
1664
1665 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1666 tty_port_tty_hangup(&acm->port, false);
1667
1668 return acm_resume(intf);
1669 }
1670
1671 #endif /* CONFIG_PM */
1672
1673 #define NOKIA_PCSUITE_ACM_INFO(x) \
1674 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1675 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1676 USB_CDC_ACM_PROTO_VENDOR)
1677
1678 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1679 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1680 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1681 USB_CDC_ACM_PROTO_VENDOR)
1682
1683 /*
1684 * USB driver structure.
1685 */
1686
1687 static const struct usb_device_id acm_ids[] = {
1688 /* quirky and broken devices */
1689 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1690 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1691 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1692 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1693 },
1694 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1695 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1696 },
1697 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1698 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1699 },
1700 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1701 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1702 },
1703 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1704 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1705 },
1706 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1707 .driver_info = SINGLE_RX_URB,
1708 },
1709 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1710 .driver_info = SINGLE_RX_URB, /* firmware bug */
1711 },
1712 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1713 .driver_info = SINGLE_RX_URB, /* firmware bug */
1714 },
1715 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */
1716 .driver_info = SINGLE_RX_URB,
1717 },
1718 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1719 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1720 },
1721 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1722 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1723 },
1724 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1725 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1726 },
1727 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1728 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1729 },
1730 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1731 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1732 },
1733 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1734 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1735 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1736 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */
1737 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1738 },
1739 /* Motorola H24 HSPA module: */
1740 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1741 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1742 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1743 },
1744 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1745 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1746 },
1747 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1748 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1749 },
1750 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1751 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1752 },
1753 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1754 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1755 },
1756 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1757 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1758 },
1759 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1760 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1761 },
1762
1763 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1764 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1765 data interface instead of
1766 communications interface.
1767 Maybe we should define a new
1768 quirk for this. */
1769 },
1770 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1771 .driver_info = NO_UNION_NORMAL,
1772 },
1773 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1774 .driver_info = NO_UNION_NORMAL,
1775 },
1776 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1777 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1778 },
1779 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1780 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1781 },
1782 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */
1783 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1784 },
1785 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
1786 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
1787 },
1788
1789 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1790 .driver_info = CLEAR_HALT_CONDITIONS,
1791 },
1792
1793 /* Nokia S60 phones expose two ACM channels. The first is
1794 * a modem and is picked up by the standard AT-command
1795 * information below. The second is 'vendor-specific' but
1796 * is treated as a serial device at the S60 end, so we want
1797 * to expose it on Linux too. */
1798 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1800 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1802 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1805 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1808 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1810 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1811 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1812 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1813 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1816 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1818 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1819 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1820 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1821 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1822 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1827 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1829 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1830 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1831 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1832 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1833 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1834 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1836 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1837 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1838 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1839 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1840 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1841 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1842 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1844 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1845 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1847 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1849 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1850 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1851 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1852 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1853 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1854 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1855 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1856
1857 /* Support for Owen devices */
1858 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1859
1860 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1861
1862 /* Support Lego NXT using pbLua firmware */
1863 { USB_DEVICE(0x0694, 0xff00),
1864 .driver_info = NOT_A_MODEM,
1865 },
1866
1867 /* Support for Droids MuIn LCD */
1868 { USB_DEVICE(0x04d8, 0x000b),
1869 .driver_info = NO_DATA_INTERFACE,
1870 },
1871
1872 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1873 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1874 .driver_info = IGNORE_DEVICE,
1875 },
1876 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1877 .driver_info = IGNORE_DEVICE,
1878 },
1879 #endif
1880
1881 /*Samsung phone in firmware update mode */
1882 { USB_DEVICE(0x04e8, 0x685d),
1883 .driver_info = IGNORE_DEVICE,
1884 },
1885
1886 /* Exclude Infineon Flash Loader utility */
1887 { USB_DEVICE(0x058b, 0x0041),
1888 .driver_info = IGNORE_DEVICE,
1889 },
1890
1891 /* control interfaces without any protocol set */
1892 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1893 USB_CDC_PROTO_NONE) },
1894
1895 /* control interfaces with various AT-command sets */
1896 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1897 USB_CDC_ACM_PROTO_AT_V25TER) },
1898 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1899 USB_CDC_ACM_PROTO_AT_PCCA101) },
1900 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1901 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1902 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1903 USB_CDC_ACM_PROTO_AT_GSM) },
1904 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1905 USB_CDC_ACM_PROTO_AT_3G) },
1906 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1907 USB_CDC_ACM_PROTO_AT_CDMA) },
1908
1909 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1910 .driver_info = SEND_ZERO_PACKET,
1911 },
1912
1913 { }
1914 };
1915
1916 MODULE_DEVICE_TABLE(usb, acm_ids);
1917
1918 static struct usb_driver acm_driver = {
1919 .name = "cdc_acm",
1920 .probe = acm_probe,
1921 .disconnect = acm_disconnect,
1922 #ifdef CONFIG_PM
1923 .suspend = acm_suspend,
1924 .resume = acm_resume,
1925 .reset_resume = acm_reset_resume,
1926 #endif
1927 .id_table = acm_ids,
1928 #ifdef CONFIG_PM
1929 .supports_autosuspend = 1,
1930 #endif
1931 .disable_hub_initiated_lpm = 1,
1932 };
1933
1934 /*
1935 * TTY driver structures.
1936 */
1937
1938 static const struct tty_operations acm_ops = {
1939 .install = acm_tty_install,
1940 .open = acm_tty_open,
1941 .close = acm_tty_close,
1942 .cleanup = acm_tty_cleanup,
1943 .hangup = acm_tty_hangup,
1944 .write = acm_tty_write,
1945 .write_room = acm_tty_write_room,
1946 .ioctl = acm_tty_ioctl,
1947 .throttle = acm_tty_throttle,
1948 .unthrottle = acm_tty_unthrottle,
1949 .chars_in_buffer = acm_tty_chars_in_buffer,
1950 .break_ctl = acm_tty_break_ctl,
1951 .set_termios = acm_tty_set_termios,
1952 .tiocmget = acm_tty_tiocmget,
1953 .tiocmset = acm_tty_tiocmset,
1954 };
1955
1956 /*
1957 * Init / exit.
1958 */
1959
acm_init(void)1960 static int __init acm_init(void)
1961 {
1962 int retval;
1963 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1964 if (!acm_tty_driver)
1965 return -ENOMEM;
1966 acm_tty_driver->driver_name = "acm",
1967 acm_tty_driver->name = "ttyACM",
1968 acm_tty_driver->major = ACM_TTY_MAJOR,
1969 acm_tty_driver->minor_start = 0,
1970 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1971 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1972 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1973 acm_tty_driver->init_termios = tty_std_termios;
1974 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1975 HUPCL | CLOCAL;
1976 tty_set_operations(acm_tty_driver, &acm_ops);
1977
1978 retval = tty_register_driver(acm_tty_driver);
1979 if (retval) {
1980 put_tty_driver(acm_tty_driver);
1981 return retval;
1982 }
1983
1984 retval = usb_register(&acm_driver);
1985 if (retval) {
1986 tty_unregister_driver(acm_tty_driver);
1987 put_tty_driver(acm_tty_driver);
1988 return retval;
1989 }
1990
1991 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1992
1993 return 0;
1994 }
1995
acm_exit(void)1996 static void __exit acm_exit(void)
1997 {
1998 usb_deregister(&acm_driver);
1999 tty_unregister_driver(acm_tty_driver);
2000 put_tty_driver(acm_tty_driver);
2001 }
2002
2003 module_init(acm_init);
2004 module_exit(acm_exit);
2005
2006 MODULE_AUTHOR(DRIVER_AUTHOR);
2007 MODULE_DESCRIPTION(DRIVER_DESC);
2008 MODULE_LICENSE("GPL");
2009 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
2010