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 newctrl = get_unaligned_le16(data);
319
320 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
321 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
322 __func__);
323 tty_port_tty_hangup(&acm->port, false);
324 }
325
326 difference = acm->ctrlin ^ newctrl;
327 spin_lock(&acm->read_lock);
328 acm->ctrlin = newctrl;
329 acm->oldcount = acm->iocount;
330
331 if (difference & ACM_CTRL_DSR)
332 acm->iocount.dsr++;
333 if (difference & ACM_CTRL_BRK)
334 acm->iocount.brk++;
335 if (difference & ACM_CTRL_RI)
336 acm->iocount.rng++;
337 if (difference & ACM_CTRL_DCD)
338 acm->iocount.dcd++;
339 if (difference & ACM_CTRL_FRAMING)
340 acm->iocount.frame++;
341 if (difference & ACM_CTRL_PARITY)
342 acm->iocount.parity++;
343 if (difference & ACM_CTRL_OVERRUN)
344 acm->iocount.overrun++;
345 spin_unlock(&acm->read_lock);
346
347 if (difference)
348 wake_up_all(&acm->wioctl);
349
350 break;
351
352 default:
353 dev_dbg(&acm->control->dev,
354 "%s - unknown notification %d received: index %d "
355 "len %d data0 %d data1 %d\n",
356 __func__,
357 dr->bNotificationType, dr->wIndex,
358 dr->wLength, data[0], data[1]);
359 break;
360 }
361 exit:
362 retval = usb_submit_urb(urb, GFP_ATOMIC);
363 if (retval && retval != -EPERM)
364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
365 __func__, retval);
366 }
367
acm_submit_read_urb(struct acm * acm,int index,gfp_t mem_flags)368 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
369 {
370 int res;
371
372 if (!test_and_clear_bit(index, &acm->read_urbs_free))
373 return 0;
374
375 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
376
377 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
378 if (res) {
379 if (res != -EPERM) {
380 dev_err(&acm->data->dev,
381 "%s - usb_submit_urb failed: %d\n",
382 __func__, res);
383 }
384 set_bit(index, &acm->read_urbs_free);
385 return res;
386 }
387
388 return 0;
389 }
390
acm_submit_read_urbs(struct acm * acm,gfp_t mem_flags)391 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
392 {
393 int res;
394 int i;
395
396 for (i = 0; i < acm->rx_buflimit; ++i) {
397 res = acm_submit_read_urb(acm, i, mem_flags);
398 if (res)
399 return res;
400 }
401
402 return 0;
403 }
404
acm_process_read_urb(struct acm * acm,struct urb * urb)405 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
406 {
407 if (!urb->actual_length)
408 return;
409
410 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
411 urb->actual_length);
412 tty_flip_buffer_push(&acm->port);
413 }
414
acm_read_bulk_callback(struct urb * urb)415 static void acm_read_bulk_callback(struct urb *urb)
416 {
417 struct acm_rb *rb = urb->context;
418 struct acm *acm = rb->instance;
419 unsigned long flags;
420 int status = urb->status;
421
422 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
423 rb->index, urb->actual_length);
424
425 if (!acm->dev) {
426 set_bit(rb->index, &acm->read_urbs_free);
427 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
428 return;
429 }
430
431 if (status) {
432 set_bit(rb->index, &acm->read_urbs_free);
433 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
434 __func__, status);
435 if ((status != -ENOENT) || (urb->actual_length == 0))
436 return;
437 }
438
439 usb_mark_last_busy(acm->dev);
440
441 acm_process_read_urb(acm, urb);
442 /*
443 * Unthrottle may run on another CPU which needs to see events
444 * in the same order. Submission has an implict barrier
445 */
446 smp_mb__before_atomic();
447 set_bit(rb->index, &acm->read_urbs_free);
448
449 /* throttle device if requested by tty */
450 spin_lock_irqsave(&acm->read_lock, flags);
451 acm->throttled = acm->throttle_req;
452 if (!acm->throttled) {
453 spin_unlock_irqrestore(&acm->read_lock, flags);
454 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
455 } else {
456 spin_unlock_irqrestore(&acm->read_lock, flags);
457 }
458 }
459
460 /* data interface wrote those outgoing bytes */
acm_write_bulk(struct urb * urb)461 static void acm_write_bulk(struct urb *urb)
462 {
463 struct acm_wb *wb = urb->context;
464 struct acm *acm = wb->instance;
465 unsigned long flags;
466 int status = urb->status;
467
468 if (status || (urb->actual_length != urb->transfer_buffer_length))
469 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
470 __func__,
471 urb->actual_length,
472 urb->transfer_buffer_length,
473 status);
474
475 spin_lock_irqsave(&acm->write_lock, flags);
476 acm_write_done(acm, wb);
477 spin_unlock_irqrestore(&acm->write_lock, flags);
478 schedule_work(&acm->work);
479 }
480
acm_softint(struct work_struct * work)481 static void acm_softint(struct work_struct *work)
482 {
483 struct acm *acm = container_of(work, struct acm, work);
484
485 dev_vdbg(&acm->data->dev, "%s\n", __func__);
486
487 tty_port_tty_wakeup(&acm->port);
488 }
489
490 /*
491 * TTY handlers
492 */
493
acm_tty_install(struct tty_driver * driver,struct tty_struct * tty)494 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
495 {
496 struct acm *acm;
497 int retval;
498
499 dev_dbg(tty->dev, "%s\n", __func__);
500
501 acm = acm_get_by_index(tty->index);
502 if (!acm)
503 return -ENODEV;
504
505 retval = tty_standard_install(driver, tty);
506 if (retval)
507 goto error_init_termios;
508
509 tty->driver_data = acm;
510
511 return 0;
512
513 error_init_termios:
514 tty_port_put(&acm->port);
515 return retval;
516 }
517
acm_tty_open(struct tty_struct * tty,struct file * filp)518 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
519 {
520 struct acm *acm = tty->driver_data;
521
522 dev_dbg(tty->dev, "%s\n", __func__);
523
524 return tty_port_open(&acm->port, tty, filp);
525 }
526
acm_port_dtr_rts(struct tty_port * port,int raise)527 static void acm_port_dtr_rts(struct tty_port *port, int raise)
528 {
529 struct acm *acm = container_of(port, struct acm, port);
530 int val;
531 int res;
532
533 if (raise)
534 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
535 else
536 val = 0;
537
538 /* FIXME: add missing ctrlout locking throughout driver */
539 acm->ctrlout = val;
540
541 res = acm_set_control(acm, val);
542 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
543 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
544 }
545
acm_port_activate(struct tty_port * port,struct tty_struct * tty)546 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
547 {
548 struct acm *acm = container_of(port, struct acm, port);
549 int retval = -ENODEV;
550 int i;
551
552 dev_dbg(&acm->control->dev, "%s\n", __func__);
553
554 mutex_lock(&acm->mutex);
555 if (acm->disconnected)
556 goto disconnected;
557
558 retval = usb_autopm_get_interface(acm->control);
559 if (retval)
560 goto error_get_interface;
561
562 /*
563 * FIXME: Why do we need this? Allocating 64K of physically contiguous
564 * memory is really nasty...
565 */
566 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
567 acm->control->needs_remote_wakeup = 1;
568
569 acm->ctrlurb->dev = acm->dev;
570 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
571 if (retval) {
572 dev_err(&acm->control->dev,
573 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
574 goto error_submit_urb;
575 }
576
577 acm_tty_set_termios(tty, NULL);
578
579 /*
580 * Unthrottle device in case the TTY was closed while throttled.
581 */
582 spin_lock_irq(&acm->read_lock);
583 acm->throttled = 0;
584 acm->throttle_req = 0;
585 spin_unlock_irq(&acm->read_lock);
586
587 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
588 if (retval)
589 goto error_submit_read_urbs;
590
591 usb_autopm_put_interface(acm->control);
592
593 mutex_unlock(&acm->mutex);
594
595 return 0;
596
597 error_submit_read_urbs:
598 for (i = 0; i < acm->rx_buflimit; i++)
599 usb_kill_urb(acm->read_urbs[i]);
600 usb_kill_urb(acm->ctrlurb);
601 error_submit_urb:
602 usb_autopm_put_interface(acm->control);
603 error_get_interface:
604 disconnected:
605 mutex_unlock(&acm->mutex);
606
607 return usb_translate_errors(retval);
608 }
609
acm_port_destruct(struct tty_port * port)610 static void acm_port_destruct(struct tty_port *port)
611 {
612 struct acm *acm = container_of(port, struct acm, port);
613
614 dev_dbg(&acm->control->dev, "%s\n", __func__);
615
616 acm_release_minor(acm);
617 usb_put_intf(acm->control);
618 kfree(acm->country_codes);
619 kfree(acm);
620 }
621
acm_port_shutdown(struct tty_port * port)622 static void acm_port_shutdown(struct tty_port *port)
623 {
624 struct acm *acm = container_of(port, struct acm, port);
625 struct urb *urb;
626 struct acm_wb *wb;
627 int i;
628
629 dev_dbg(&acm->control->dev, "%s\n", __func__);
630
631 /*
632 * Need to grab write_lock to prevent race with resume, but no need to
633 * hold it due to the tty-port initialised flag.
634 */
635 spin_lock_irq(&acm->write_lock);
636 spin_unlock_irq(&acm->write_lock);
637
638 usb_autopm_get_interface_no_resume(acm->control);
639 acm->control->needs_remote_wakeup = 0;
640 usb_autopm_put_interface(acm->control);
641
642 for (;;) {
643 urb = usb_get_from_anchor(&acm->delayed);
644 if (!urb)
645 break;
646 wb = urb->context;
647 wb->use = 0;
648 usb_autopm_put_interface_async(acm->control);
649 }
650
651 usb_kill_urb(acm->ctrlurb);
652 for (i = 0; i < ACM_NW; i++)
653 usb_kill_urb(acm->wb[i].urb);
654 for (i = 0; i < acm->rx_buflimit; i++)
655 usb_kill_urb(acm->read_urbs[i]);
656 }
657
acm_tty_cleanup(struct tty_struct * tty)658 static void acm_tty_cleanup(struct tty_struct *tty)
659 {
660 struct acm *acm = tty->driver_data;
661 dev_dbg(&acm->control->dev, "%s\n", __func__);
662 tty_port_put(&acm->port);
663 }
664
acm_tty_hangup(struct tty_struct * tty)665 static void acm_tty_hangup(struct tty_struct *tty)
666 {
667 struct acm *acm = tty->driver_data;
668 dev_dbg(&acm->control->dev, "%s\n", __func__);
669 tty_port_hangup(&acm->port);
670 }
671
acm_tty_close(struct tty_struct * tty,struct file * filp)672 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
673 {
674 struct acm *acm = tty->driver_data;
675 dev_dbg(&acm->control->dev, "%s\n", __func__);
676 tty_port_close(&acm->port, tty, filp);
677 }
678
acm_tty_write(struct tty_struct * tty,const unsigned char * buf,int count)679 static int acm_tty_write(struct tty_struct *tty,
680 const unsigned char *buf, int count)
681 {
682 struct acm *acm = tty->driver_data;
683 int stat;
684 unsigned long flags;
685 int wbn;
686 struct acm_wb *wb;
687
688 if (!count)
689 return 0;
690
691 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
692
693 spin_lock_irqsave(&acm->write_lock, flags);
694 wbn = acm_wb_alloc(acm);
695 if (wbn < 0) {
696 spin_unlock_irqrestore(&acm->write_lock, flags);
697 return 0;
698 }
699 wb = &acm->wb[wbn];
700
701 if (!acm->dev) {
702 wb->use = 0;
703 spin_unlock_irqrestore(&acm->write_lock, flags);
704 return -ENODEV;
705 }
706
707 count = (count > acm->writesize) ? acm->writesize : count;
708 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
709 memcpy(wb->buf, buf, count);
710 wb->len = count;
711
712 stat = usb_autopm_get_interface_async(acm->control);
713 if (stat) {
714 wb->use = 0;
715 spin_unlock_irqrestore(&acm->write_lock, flags);
716 return stat;
717 }
718
719 if (acm->susp_count) {
720 usb_anchor_urb(wb->urb, &acm->delayed);
721 spin_unlock_irqrestore(&acm->write_lock, flags);
722 return count;
723 }
724
725 stat = acm_start_wb(acm, wb);
726 spin_unlock_irqrestore(&acm->write_lock, flags);
727
728 if (stat < 0)
729 return stat;
730 return count;
731 }
732
acm_tty_write_room(struct tty_struct * tty)733 static int acm_tty_write_room(struct tty_struct *tty)
734 {
735 struct acm *acm = tty->driver_data;
736 /*
737 * Do not let the line discipline to know that we have a reserve,
738 * or it might get too enthusiastic.
739 */
740 return acm_wb_is_avail(acm) ? acm->writesize : 0;
741 }
742
acm_tty_chars_in_buffer(struct tty_struct * tty)743 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
744 {
745 struct acm *acm = tty->driver_data;
746 /*
747 * if the device was unplugged then any remaining characters fell out
748 * of the connector ;)
749 */
750 if (acm->disconnected)
751 return 0;
752 /*
753 * This is inaccurate (overcounts), but it works.
754 */
755 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
756 }
757
acm_tty_throttle(struct tty_struct * tty)758 static void acm_tty_throttle(struct tty_struct *tty)
759 {
760 struct acm *acm = tty->driver_data;
761
762 spin_lock_irq(&acm->read_lock);
763 acm->throttle_req = 1;
764 spin_unlock_irq(&acm->read_lock);
765 }
766
acm_tty_unthrottle(struct tty_struct * tty)767 static void acm_tty_unthrottle(struct tty_struct *tty)
768 {
769 struct acm *acm = tty->driver_data;
770 unsigned int was_throttled;
771
772 spin_lock_irq(&acm->read_lock);
773 was_throttled = acm->throttled;
774 acm->throttled = 0;
775 acm->throttle_req = 0;
776 spin_unlock_irq(&acm->read_lock);
777
778 if (was_throttled)
779 acm_submit_read_urbs(acm, GFP_KERNEL);
780 }
781
acm_tty_break_ctl(struct tty_struct * tty,int state)782 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
783 {
784 struct acm *acm = tty->driver_data;
785 int retval;
786
787 retval = acm_send_break(acm, state ? 0xffff : 0);
788 if (retval < 0)
789 dev_dbg(&acm->control->dev, "%s - send break failed\n",
790 __func__);
791 return retval;
792 }
793
acm_tty_tiocmget(struct tty_struct * tty)794 static int acm_tty_tiocmget(struct tty_struct *tty)
795 {
796 struct acm *acm = tty->driver_data;
797
798 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
799 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
800 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
801 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
802 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
803 TIOCM_CTS;
804 }
805
acm_tty_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)806 static int acm_tty_tiocmset(struct tty_struct *tty,
807 unsigned int set, unsigned int clear)
808 {
809 struct acm *acm = tty->driver_data;
810 unsigned int newctrl;
811
812 newctrl = acm->ctrlout;
813 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
814 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
815 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
816 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
817
818 newctrl = (newctrl & ~clear) | set;
819
820 if (acm->ctrlout == newctrl)
821 return 0;
822 return acm_set_control(acm, acm->ctrlout = newctrl);
823 }
824
get_serial_info(struct acm * acm,struct serial_struct __user * info)825 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
826 {
827 struct serial_struct tmp;
828
829 if (!info)
830 return -EINVAL;
831
832 memset(&tmp, 0, sizeof(tmp));
833 tmp.flags = ASYNC_LOW_LATENCY;
834 tmp.xmit_fifo_size = acm->writesize;
835 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
836 tmp.close_delay = acm->port.close_delay / 10;
837 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
838 ASYNC_CLOSING_WAIT_NONE :
839 acm->port.closing_wait / 10;
840
841 if (copy_to_user(info, &tmp, sizeof(tmp)))
842 return -EFAULT;
843 else
844 return 0;
845 }
846
set_serial_info(struct acm * acm,struct serial_struct __user * newinfo)847 static int set_serial_info(struct acm *acm,
848 struct serial_struct __user *newinfo)
849 {
850 struct serial_struct new_serial;
851 unsigned int closing_wait, close_delay;
852 int retval = 0;
853
854 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
855 return -EFAULT;
856
857 close_delay = new_serial.close_delay * 10;
858 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
859 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
860
861 mutex_lock(&acm->port.mutex);
862
863 if (!capable(CAP_SYS_ADMIN)) {
864 if ((close_delay != acm->port.close_delay) ||
865 (closing_wait != acm->port.closing_wait))
866 retval = -EPERM;
867 else
868 retval = -EOPNOTSUPP;
869 } else {
870 acm->port.close_delay = close_delay;
871 acm->port.closing_wait = closing_wait;
872 }
873
874 mutex_unlock(&acm->port.mutex);
875 return retval;
876 }
877
wait_serial_change(struct acm * acm,unsigned long arg)878 static int wait_serial_change(struct acm *acm, unsigned long arg)
879 {
880 int rv = 0;
881 DECLARE_WAITQUEUE(wait, current);
882 struct async_icount old, new;
883
884 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
885 return -EINVAL;
886 do {
887 spin_lock_irq(&acm->read_lock);
888 old = acm->oldcount;
889 new = acm->iocount;
890 acm->oldcount = new;
891 spin_unlock_irq(&acm->read_lock);
892
893 if ((arg & TIOCM_DSR) &&
894 old.dsr != new.dsr)
895 break;
896 if ((arg & TIOCM_CD) &&
897 old.dcd != new.dcd)
898 break;
899 if ((arg & TIOCM_RI) &&
900 old.rng != new.rng)
901 break;
902
903 add_wait_queue(&acm->wioctl, &wait);
904 set_current_state(TASK_INTERRUPTIBLE);
905 schedule();
906 remove_wait_queue(&acm->wioctl, &wait);
907 if (acm->disconnected) {
908 if (arg & TIOCM_CD)
909 break;
910 else
911 rv = -ENODEV;
912 } else {
913 if (signal_pending(current))
914 rv = -ERESTARTSYS;
915 }
916 } while (!rv);
917
918
919
920 return rv;
921 }
922
get_serial_usage(struct acm * acm,struct serial_icounter_struct __user * count)923 static int get_serial_usage(struct acm *acm,
924 struct serial_icounter_struct __user *count)
925 {
926 struct serial_icounter_struct icount;
927 int rv = 0;
928
929 memset(&icount, 0, sizeof(icount));
930 icount.dsr = acm->iocount.dsr;
931 icount.rng = acm->iocount.rng;
932 icount.dcd = acm->iocount.dcd;
933 icount.frame = acm->iocount.frame;
934 icount.overrun = acm->iocount.overrun;
935 icount.parity = acm->iocount.parity;
936 icount.brk = acm->iocount.brk;
937
938 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
939 rv = -EFAULT;
940
941 return rv;
942 }
943
acm_tty_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)944 static int acm_tty_ioctl(struct tty_struct *tty,
945 unsigned int cmd, unsigned long arg)
946 {
947 struct acm *acm = tty->driver_data;
948 int rv = -ENOIOCTLCMD;
949
950 switch (cmd) {
951 case TIOCGSERIAL: /* gets serial port data */
952 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
953 break;
954 case TIOCSSERIAL:
955 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
956 break;
957 case TIOCMIWAIT:
958 rv = usb_autopm_get_interface(acm->control);
959 if (rv < 0) {
960 rv = -EIO;
961 break;
962 }
963 rv = wait_serial_change(acm, arg);
964 usb_autopm_put_interface(acm->control);
965 break;
966 case TIOCGICOUNT:
967 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
968 break;
969 }
970
971 return rv;
972 }
973
acm_tty_set_termios(struct tty_struct * tty,struct ktermios * termios_old)974 static void acm_tty_set_termios(struct tty_struct *tty,
975 struct ktermios *termios_old)
976 {
977 struct acm *acm = tty->driver_data;
978 struct ktermios *termios = &tty->termios;
979 struct usb_cdc_line_coding newline;
980 int newctrl = acm->ctrlout;
981
982 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
983 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
984 newline.bParityType = termios->c_cflag & PARENB ?
985 (termios->c_cflag & PARODD ? 1 : 2) +
986 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
987 switch (termios->c_cflag & CSIZE) {
988 case CS5:
989 newline.bDataBits = 5;
990 break;
991 case CS6:
992 newline.bDataBits = 6;
993 break;
994 case CS7:
995 newline.bDataBits = 7;
996 break;
997 case CS8:
998 default:
999 newline.bDataBits = 8;
1000 break;
1001 }
1002 /* FIXME: Needs to clear unsupported bits in the termios */
1003 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1004
1005 if (C_BAUD(tty) == B0) {
1006 newline.dwDTERate = acm->line.dwDTERate;
1007 newctrl &= ~ACM_CTRL_DTR;
1008 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1009 newctrl |= ACM_CTRL_DTR;
1010 }
1011
1012 if (newctrl != acm->ctrlout)
1013 acm_set_control(acm, acm->ctrlout = newctrl);
1014
1015 if (memcmp(&acm->line, &newline, sizeof newline)) {
1016 memcpy(&acm->line, &newline, sizeof newline);
1017 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1018 __func__,
1019 le32_to_cpu(newline.dwDTERate),
1020 newline.bCharFormat, newline.bParityType,
1021 newline.bDataBits);
1022 acm_set_line(acm, &acm->line);
1023 }
1024 }
1025
1026 static const struct tty_port_operations acm_port_ops = {
1027 .dtr_rts = acm_port_dtr_rts,
1028 .shutdown = acm_port_shutdown,
1029 .activate = acm_port_activate,
1030 .destruct = acm_port_destruct,
1031 };
1032
1033 /*
1034 * USB probe and disconnect routines.
1035 */
1036
1037 /* Little helpers: write/read buffers free */
acm_write_buffers_free(struct acm * acm)1038 static void acm_write_buffers_free(struct acm *acm)
1039 {
1040 int i;
1041 struct acm_wb *wb;
1042 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1043
1044 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1045 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1046 }
1047
acm_read_buffers_free(struct acm * acm)1048 static void acm_read_buffers_free(struct acm *acm)
1049 {
1050 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1051 int i;
1052
1053 for (i = 0; i < acm->rx_buflimit; i++)
1054 usb_free_coherent(usb_dev, acm->readsize,
1055 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1056 }
1057
1058 /* Little helper: write buffers allocate */
acm_write_buffers_alloc(struct acm * acm)1059 static int acm_write_buffers_alloc(struct acm *acm)
1060 {
1061 int i;
1062 struct acm_wb *wb;
1063
1064 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1065 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1066 &wb->dmah);
1067 if (!wb->buf) {
1068 while (i != 0) {
1069 --i;
1070 --wb;
1071 usb_free_coherent(acm->dev, acm->writesize,
1072 wb->buf, wb->dmah);
1073 }
1074 return -ENOMEM;
1075 }
1076 }
1077 return 0;
1078 }
1079
acm_probe(struct usb_interface * intf,const struct usb_device_id * id)1080 static int acm_probe(struct usb_interface *intf,
1081 const struct usb_device_id *id)
1082 {
1083 struct usb_cdc_union_desc *union_header = NULL;
1084 struct usb_cdc_country_functional_desc *cfd = NULL;
1085 unsigned char *buffer = intf->altsetting->extra;
1086 int buflen = intf->altsetting->extralen;
1087 struct usb_interface *control_interface;
1088 struct usb_interface *data_interface;
1089 struct usb_endpoint_descriptor *epctrl = NULL;
1090 struct usb_endpoint_descriptor *epread = NULL;
1091 struct usb_endpoint_descriptor *epwrite = NULL;
1092 struct usb_device *usb_dev = interface_to_usbdev(intf);
1093 struct acm *acm;
1094 int minor;
1095 int ctrlsize, readsize;
1096 u8 *buf;
1097 u8 ac_management_function = 0;
1098 u8 call_management_function = 0;
1099 int call_interface_num = -1;
1100 int data_interface_num = -1;
1101 unsigned long quirks;
1102 int num_rx_buf;
1103 int i;
1104 unsigned int elength = 0;
1105 int combined_interfaces = 0;
1106 struct device *tty_dev;
1107 int rv = -ENOMEM;
1108
1109 /* normal quirks */
1110 quirks = (unsigned long)id->driver_info;
1111
1112 if (quirks == IGNORE_DEVICE)
1113 return -ENODEV;
1114
1115 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1116
1117 /* handle quirks deadly to normal probing*/
1118 if (quirks == NO_UNION_NORMAL) {
1119 data_interface = usb_ifnum_to_if(usb_dev, 1);
1120 control_interface = usb_ifnum_to_if(usb_dev, 0);
1121 /* we would crash */
1122 if (!data_interface || !control_interface)
1123 return -ENODEV;
1124 goto skip_normal_probe;
1125 }
1126
1127 /* normal probing*/
1128 if (!buffer) {
1129 dev_err(&intf->dev, "Weird descriptor references\n");
1130 return -EINVAL;
1131 }
1132
1133 if (!buflen) {
1134 if (intf->cur_altsetting->endpoint &&
1135 intf->cur_altsetting->endpoint->extralen &&
1136 intf->cur_altsetting->endpoint->extra) {
1137 dev_dbg(&intf->dev,
1138 "Seeking extra descriptors on endpoint\n");
1139 buflen = intf->cur_altsetting->endpoint->extralen;
1140 buffer = intf->cur_altsetting->endpoint->extra;
1141 } else {
1142 dev_err(&intf->dev,
1143 "Zero length descriptor references\n");
1144 return -EINVAL;
1145 }
1146 }
1147
1148 while (buflen > 0) {
1149 elength = buffer[0];
1150 if (!elength) {
1151 dev_err(&intf->dev, "skipping garbage byte\n");
1152 elength = 1;
1153 goto next_desc;
1154 }
1155 if (buffer[1] != USB_DT_CS_INTERFACE) {
1156 dev_err(&intf->dev, "skipping garbage\n");
1157 goto next_desc;
1158 }
1159
1160 switch (buffer[2]) {
1161 case USB_CDC_UNION_TYPE: /* we've found it */
1162 if (elength < sizeof(struct usb_cdc_union_desc))
1163 goto next_desc;
1164 if (union_header) {
1165 dev_err(&intf->dev, "More than one "
1166 "union descriptor, skipping ...\n");
1167 goto next_desc;
1168 }
1169 union_header = (struct usb_cdc_union_desc *)buffer;
1170 break;
1171 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1172 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1173 goto next_desc;
1174 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1175 break;
1176 case USB_CDC_HEADER_TYPE: /* maybe check version */
1177 break; /* for now we ignore it */
1178 case USB_CDC_ACM_TYPE:
1179 if (elength < 4)
1180 goto next_desc;
1181 ac_management_function = buffer[3];
1182 break;
1183 case USB_CDC_CALL_MANAGEMENT_TYPE:
1184 if (elength < 5)
1185 goto next_desc;
1186 call_management_function = buffer[3];
1187 call_interface_num = buffer[4];
1188 break;
1189 default:
1190 /*
1191 * there are LOTS more CDC descriptors that
1192 * could legitimately be found here.
1193 */
1194 dev_dbg(&intf->dev, "Ignoring descriptor: "
1195 "type %02x, length %ud\n",
1196 buffer[2], elength);
1197 break;
1198 }
1199 next_desc:
1200 buflen -= elength;
1201 buffer += elength;
1202 }
1203
1204 if (!union_header) {
1205 if (call_interface_num > 0) {
1206 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1207 /* quirks for Droids MuIn LCD */
1208 if (quirks & NO_DATA_INTERFACE)
1209 data_interface = usb_ifnum_to_if(usb_dev, 0);
1210 else
1211 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1212 control_interface = intf;
1213 } else {
1214 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1215 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1216 return -ENODEV;
1217 } else {
1218 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1219 combined_interfaces = 1;
1220 control_interface = data_interface = intf;
1221 goto look_for_collapsed_interface;
1222 }
1223 }
1224 } else {
1225 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1226 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1227 }
1228
1229 if (!control_interface || !data_interface) {
1230 dev_dbg(&intf->dev, "no interfaces\n");
1231 return -ENODEV;
1232 }
1233
1234 if (data_interface_num != call_interface_num)
1235 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1236
1237 if (control_interface == data_interface) {
1238 /* some broken devices designed for windows work this way */
1239 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1240 combined_interfaces = 1;
1241 /* a popular other OS doesn't use it */
1242 quirks |= NO_CAP_LINE;
1243 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1244 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1245 return -EINVAL;
1246 }
1247 look_for_collapsed_interface:
1248 for (i = 0; i < 3; i++) {
1249 struct usb_endpoint_descriptor *ep;
1250 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1251
1252 if (usb_endpoint_is_int_in(ep))
1253 epctrl = ep;
1254 else if (usb_endpoint_is_bulk_out(ep))
1255 epwrite = ep;
1256 else if (usb_endpoint_is_bulk_in(ep))
1257 epread = ep;
1258 else
1259 return -EINVAL;
1260 }
1261 if (!epctrl || !epread || !epwrite)
1262 return -ENODEV;
1263 else
1264 goto made_compressed_probe;
1265 }
1266
1267 skip_normal_probe:
1268
1269 /*workaround for switched interfaces */
1270 if (data_interface->cur_altsetting->desc.bInterfaceClass
1271 != CDC_DATA_INTERFACE_TYPE) {
1272 if (control_interface->cur_altsetting->desc.bInterfaceClass
1273 == CDC_DATA_INTERFACE_TYPE) {
1274 struct usb_interface *t;
1275 dev_dbg(&intf->dev,
1276 "Your device has switched interfaces.\n");
1277 t = control_interface;
1278 control_interface = data_interface;
1279 data_interface = t;
1280 } else {
1281 return -EINVAL;
1282 }
1283 }
1284
1285 /* Accept probe requests only for the control interface */
1286 if (!combined_interfaces && intf != control_interface)
1287 return -ENODEV;
1288
1289 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1290 /* valid in this context */
1291 dev_dbg(&intf->dev, "The data interface isn't available\n");
1292 return -EBUSY;
1293 }
1294
1295
1296 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1297 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1298 return -EINVAL;
1299
1300 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1301 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1302 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1303
1304
1305 /* workaround for switched endpoints */
1306 if (!usb_endpoint_dir_in(epread)) {
1307 /* descriptors are swapped */
1308 struct usb_endpoint_descriptor *t;
1309 dev_dbg(&intf->dev,
1310 "The data interface has switched endpoints\n");
1311 t = epread;
1312 epread = epwrite;
1313 epwrite = t;
1314 }
1315 made_compressed_probe:
1316 dev_dbg(&intf->dev, "interfaces are valid\n");
1317
1318 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1319 if (acm == NULL)
1320 goto alloc_fail;
1321
1322 minor = acm_alloc_minor(acm);
1323 if (minor == ACM_TTY_MINORS) {
1324 dev_err(&intf->dev, "no more free acm devices\n");
1325 kfree(acm);
1326 return -ENODEV;
1327 }
1328
1329 ctrlsize = usb_endpoint_maxp(epctrl);
1330 readsize = usb_endpoint_maxp(epread) *
1331 (quirks == SINGLE_RX_URB ? 1 : 2);
1332 acm->combined_interfaces = combined_interfaces;
1333 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1334 acm->control = control_interface;
1335 acm->data = data_interface;
1336 acm->minor = minor;
1337 acm->dev = usb_dev;
1338 acm->ctrl_caps = ac_management_function;
1339 if (quirks & NO_CAP_LINE)
1340 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1341 acm->ctrlsize = ctrlsize;
1342 acm->readsize = readsize;
1343 acm->rx_buflimit = num_rx_buf;
1344 INIT_WORK(&acm->work, acm_softint);
1345 init_waitqueue_head(&acm->wioctl);
1346 spin_lock_init(&acm->write_lock);
1347 spin_lock_init(&acm->read_lock);
1348 mutex_init(&acm->mutex);
1349 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1350 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1351 if (acm->is_int_ep)
1352 acm->bInterval = epread->bInterval;
1353 tty_port_init(&acm->port);
1354 acm->port.ops = &acm_port_ops;
1355 init_usb_anchor(&acm->delayed);
1356 acm->quirks = quirks;
1357
1358 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1359 if (!buf)
1360 goto alloc_fail2;
1361 acm->ctrl_buffer = buf;
1362
1363 if (acm_write_buffers_alloc(acm) < 0)
1364 goto alloc_fail4;
1365
1366 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1367 if (!acm->ctrlurb)
1368 goto alloc_fail5;
1369
1370 for (i = 0; i < num_rx_buf; i++) {
1371 struct acm_rb *rb = &(acm->read_buffers[i]);
1372 struct urb *urb;
1373
1374 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1375 &rb->dma);
1376 if (!rb->base)
1377 goto alloc_fail6;
1378 rb->index = i;
1379 rb->instance = acm;
1380
1381 urb = usb_alloc_urb(0, GFP_KERNEL);
1382 if (!urb)
1383 goto alloc_fail6;
1384
1385 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1386 urb->transfer_dma = rb->dma;
1387 if (acm->is_int_ep) {
1388 usb_fill_int_urb(urb, acm->dev,
1389 acm->rx_endpoint,
1390 rb->base,
1391 acm->readsize,
1392 acm_read_bulk_callback, rb,
1393 acm->bInterval);
1394 } else {
1395 usb_fill_bulk_urb(urb, acm->dev,
1396 acm->rx_endpoint,
1397 rb->base,
1398 acm->readsize,
1399 acm_read_bulk_callback, rb);
1400 }
1401
1402 acm->read_urbs[i] = urb;
1403 __set_bit(i, &acm->read_urbs_free);
1404 }
1405 for (i = 0; i < ACM_NW; i++) {
1406 struct acm_wb *snd = &(acm->wb[i]);
1407
1408 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1409 if (snd->urb == NULL)
1410 goto alloc_fail7;
1411
1412 if (usb_endpoint_xfer_int(epwrite))
1413 usb_fill_int_urb(snd->urb, usb_dev,
1414 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1415 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1416 else
1417 usb_fill_bulk_urb(snd->urb, usb_dev,
1418 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1419 NULL, acm->writesize, acm_write_bulk, snd);
1420 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1421 if (quirks & SEND_ZERO_PACKET)
1422 snd->urb->transfer_flags |= URB_ZERO_PACKET;
1423 snd->instance = acm;
1424 }
1425
1426 usb_set_intfdata(intf, acm);
1427
1428 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1429 if (i < 0)
1430 goto alloc_fail7;
1431
1432 if (cfd) { /* export the country data */
1433 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1434 if (!acm->country_codes)
1435 goto skip_countries;
1436 acm->country_code_size = cfd->bLength - 4;
1437 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1438 cfd->bLength - 4);
1439 acm->country_rel_date = cfd->iCountryCodeRelDate;
1440
1441 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1442 if (i < 0) {
1443 kfree(acm->country_codes);
1444 acm->country_codes = NULL;
1445 acm->country_code_size = 0;
1446 goto skip_countries;
1447 }
1448
1449 i = device_create_file(&intf->dev,
1450 &dev_attr_iCountryCodeRelDate);
1451 if (i < 0) {
1452 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1453 kfree(acm->country_codes);
1454 acm->country_codes = NULL;
1455 acm->country_code_size = 0;
1456 goto skip_countries;
1457 }
1458 }
1459
1460 skip_countries:
1461 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1462 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1463 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1464 /* works around buggy devices */
1465 epctrl->bInterval ? epctrl->bInterval : 16);
1466 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1467 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1468
1469 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1470
1471 acm->line.dwDTERate = cpu_to_le32(9600);
1472 acm->line.bDataBits = 8;
1473 acm_set_line(acm, &acm->line);
1474
1475 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1476 usb_set_intfdata(data_interface, acm);
1477
1478 usb_get_intf(control_interface);
1479 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1480 &control_interface->dev);
1481 if (IS_ERR(tty_dev)) {
1482 rv = PTR_ERR(tty_dev);
1483 goto alloc_fail8;
1484 }
1485
1486 if (quirks & CLEAR_HALT_CONDITIONS) {
1487 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1488 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1489 }
1490
1491 return 0;
1492 alloc_fail8:
1493 if (acm->country_codes) {
1494 device_remove_file(&acm->control->dev,
1495 &dev_attr_wCountryCodes);
1496 device_remove_file(&acm->control->dev,
1497 &dev_attr_iCountryCodeRelDate);
1498 kfree(acm->country_codes);
1499 }
1500 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1501 alloc_fail7:
1502 usb_set_intfdata(intf, NULL);
1503 for (i = 0; i < ACM_NW; i++)
1504 usb_free_urb(acm->wb[i].urb);
1505 alloc_fail6:
1506 for (i = 0; i < num_rx_buf; i++)
1507 usb_free_urb(acm->read_urbs[i]);
1508 acm_read_buffers_free(acm);
1509 usb_free_urb(acm->ctrlurb);
1510 alloc_fail5:
1511 acm_write_buffers_free(acm);
1512 alloc_fail4:
1513 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1514 alloc_fail2:
1515 acm_release_minor(acm);
1516 kfree(acm);
1517 alloc_fail:
1518 return rv;
1519 }
1520
stop_data_traffic(struct acm * acm)1521 static void stop_data_traffic(struct acm *acm)
1522 {
1523 int i;
1524
1525 dev_dbg(&acm->control->dev, "%s\n", __func__);
1526
1527 usb_kill_urb(acm->ctrlurb);
1528 for (i = 0; i < ACM_NW; i++)
1529 usb_kill_urb(acm->wb[i].urb);
1530 for (i = 0; i < acm->rx_buflimit; i++)
1531 usb_kill_urb(acm->read_urbs[i]);
1532
1533 cancel_work_sync(&acm->work);
1534 }
1535
acm_disconnect(struct usb_interface * intf)1536 static void acm_disconnect(struct usb_interface *intf)
1537 {
1538 struct acm *acm = usb_get_intfdata(intf);
1539 struct usb_device *usb_dev = interface_to_usbdev(intf);
1540 struct tty_struct *tty;
1541 int i;
1542
1543 dev_dbg(&intf->dev, "%s\n", __func__);
1544
1545 /* sibling interface is already cleaning up */
1546 if (!acm)
1547 return;
1548
1549 mutex_lock(&acm->mutex);
1550 acm->disconnected = true;
1551 if (acm->country_codes) {
1552 device_remove_file(&acm->control->dev,
1553 &dev_attr_wCountryCodes);
1554 device_remove_file(&acm->control->dev,
1555 &dev_attr_iCountryCodeRelDate);
1556 }
1557 wake_up_all(&acm->wioctl);
1558 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1559 usb_set_intfdata(acm->control, NULL);
1560 usb_set_intfdata(acm->data, NULL);
1561 mutex_unlock(&acm->mutex);
1562
1563 tty = tty_port_tty_get(&acm->port);
1564 if (tty) {
1565 tty_vhangup(tty);
1566 tty_kref_put(tty);
1567 }
1568
1569 stop_data_traffic(acm);
1570
1571 tty_unregister_device(acm_tty_driver, acm->minor);
1572
1573 usb_free_urb(acm->ctrlurb);
1574 for (i = 0; i < ACM_NW; i++)
1575 usb_free_urb(acm->wb[i].urb);
1576 for (i = 0; i < acm->rx_buflimit; i++)
1577 usb_free_urb(acm->read_urbs[i]);
1578 acm_write_buffers_free(acm);
1579 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1580 acm_read_buffers_free(acm);
1581
1582 if (!acm->combined_interfaces)
1583 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1584 acm->data : acm->control);
1585
1586 tty_port_put(&acm->port);
1587 }
1588
1589 #ifdef CONFIG_PM
acm_suspend(struct usb_interface * intf,pm_message_t message)1590 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1591 {
1592 struct acm *acm = usb_get_intfdata(intf);
1593 int cnt;
1594
1595 spin_lock_irq(&acm->write_lock);
1596 if (PMSG_IS_AUTO(message)) {
1597 if (acm->transmitting) {
1598 spin_unlock_irq(&acm->write_lock);
1599 return -EBUSY;
1600 }
1601 }
1602 cnt = acm->susp_count++;
1603 spin_unlock_irq(&acm->write_lock);
1604
1605 if (cnt)
1606 return 0;
1607
1608 stop_data_traffic(acm);
1609
1610 return 0;
1611 }
1612
acm_resume(struct usb_interface * intf)1613 static int acm_resume(struct usb_interface *intf)
1614 {
1615 struct acm *acm = usb_get_intfdata(intf);
1616 struct urb *urb;
1617 int rv = 0;
1618
1619 spin_lock_irq(&acm->write_lock);
1620
1621 if (--acm->susp_count)
1622 goto out;
1623
1624 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1625 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1626
1627 for (;;) {
1628 urb = usb_get_from_anchor(&acm->delayed);
1629 if (!urb)
1630 break;
1631
1632 acm_start_wb(acm, urb->context);
1633 }
1634
1635 /*
1636 * delayed error checking because we must
1637 * do the write path at all cost
1638 */
1639 if (rv < 0)
1640 goto out;
1641
1642 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1643 }
1644 out:
1645 spin_unlock_irq(&acm->write_lock);
1646
1647 return rv;
1648 }
1649
acm_reset_resume(struct usb_interface * intf)1650 static int acm_reset_resume(struct usb_interface *intf)
1651 {
1652 struct acm *acm = usb_get_intfdata(intf);
1653
1654 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1655 tty_port_tty_hangup(&acm->port, false);
1656
1657 return acm_resume(intf);
1658 }
1659
1660 #endif /* CONFIG_PM */
1661
1662 #define NOKIA_PCSUITE_ACM_INFO(x) \
1663 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1664 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1665 USB_CDC_ACM_PROTO_VENDOR)
1666
1667 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1668 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1669 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1670 USB_CDC_ACM_PROTO_VENDOR)
1671
1672 /*
1673 * USB driver structure.
1674 */
1675
1676 static const struct usb_device_id acm_ids[] = {
1677 /* quirky and broken devices */
1678 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1679 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1680 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1681 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1682 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1683 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1684 },
1685 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1686 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1687 },
1688 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1689 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1690 },
1691 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1692 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1693 },
1694 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1695 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1696 },
1697 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1698 .driver_info = SINGLE_RX_URB,
1699 },
1700 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1701 .driver_info = SINGLE_RX_URB, /* firmware bug */
1702 },
1703 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1704 .driver_info = SINGLE_RX_URB, /* firmware bug */
1705 },
1706 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1707 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1708 },
1709 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1710 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1711 },
1712 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1713 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1714 },
1715 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1716 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1717 },
1718 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1719 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1720 },
1721 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1722 .driver_info = QUIRK_CONTROL_LINE_STATE, },
1723 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1724 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1725 },
1726 /* Motorola H24 HSPA module: */
1727 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1728 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1729 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1730 },
1731 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1732 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1733 },
1734 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1735 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1736 },
1737 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1738 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1739 },
1740 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1741 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1742 },
1743 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1744 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1745 },
1746 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1747 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1748 },
1749
1750 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1751 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1752 data interface instead of
1753 communications interface.
1754 Maybe we should define a new
1755 quirk for this. */
1756 },
1757 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1758 .driver_info = NO_UNION_NORMAL,
1759 },
1760 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1761 .driver_info = NO_UNION_NORMAL,
1762 },
1763 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1764 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1765 },
1766 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1767 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1768 },
1769
1770 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1771 .driver_info = CLEAR_HALT_CONDITIONS,
1772 },
1773
1774 /* Nokia S60 phones expose two ACM channels. The first is
1775 * a modem and is picked up by the standard AT-command
1776 * information below. The second is 'vendor-specific' but
1777 * is treated as a serial device at the S60 end, so we want
1778 * to expose it on Linux too. */
1779 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1781 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1787 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1792 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1794 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1797 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1799 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1800 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1801 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1802 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1805 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1808 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1809 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1810 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1811 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1812 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1813 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1815 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1819 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1820 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1821 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1822 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1823 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1826 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1827 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1830 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1831 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1832 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1833 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1834 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1836 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1837
1838 /* Support for Owen devices */
1839 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1840
1841 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1842
1843 /* Support for Droids MuIn LCD */
1844 { USB_DEVICE(0x04d8, 0x000b),
1845 .driver_info = NO_DATA_INTERFACE,
1846 },
1847
1848 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1849 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1850 .driver_info = IGNORE_DEVICE,
1851 },
1852 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1853 .driver_info = IGNORE_DEVICE,
1854 },
1855 #endif
1856
1857 /*Samsung phone in firmware update mode */
1858 { USB_DEVICE(0x04e8, 0x685d),
1859 .driver_info = IGNORE_DEVICE,
1860 },
1861
1862 /* Exclude Infineon Flash Loader utility */
1863 { USB_DEVICE(0x058b, 0x0041),
1864 .driver_info = IGNORE_DEVICE,
1865 },
1866
1867 /* control interfaces without any protocol set */
1868 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1869 USB_CDC_PROTO_NONE) },
1870
1871 /* control interfaces with various AT-command sets */
1872 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1873 USB_CDC_ACM_PROTO_AT_V25TER) },
1874 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1875 USB_CDC_ACM_PROTO_AT_PCCA101) },
1876 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1877 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1878 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1879 USB_CDC_ACM_PROTO_AT_GSM) },
1880 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1881 USB_CDC_ACM_PROTO_AT_3G) },
1882 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1883 USB_CDC_ACM_PROTO_AT_CDMA) },
1884
1885 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1886 .driver_info = SEND_ZERO_PACKET,
1887 },
1888
1889 { }
1890 };
1891
1892 MODULE_DEVICE_TABLE(usb, acm_ids);
1893
1894 static struct usb_driver acm_driver = {
1895 .name = "cdc_acm",
1896 .probe = acm_probe,
1897 .disconnect = acm_disconnect,
1898 #ifdef CONFIG_PM
1899 .suspend = acm_suspend,
1900 .resume = acm_resume,
1901 .reset_resume = acm_reset_resume,
1902 #endif
1903 .id_table = acm_ids,
1904 #ifdef CONFIG_PM
1905 .supports_autosuspend = 1,
1906 #endif
1907 .disable_hub_initiated_lpm = 1,
1908 };
1909
1910 /*
1911 * TTY driver structures.
1912 */
1913
1914 static const struct tty_operations acm_ops = {
1915 .install = acm_tty_install,
1916 .open = acm_tty_open,
1917 .close = acm_tty_close,
1918 .cleanup = acm_tty_cleanup,
1919 .hangup = acm_tty_hangup,
1920 .write = acm_tty_write,
1921 .write_room = acm_tty_write_room,
1922 .ioctl = acm_tty_ioctl,
1923 .throttle = acm_tty_throttle,
1924 .unthrottle = acm_tty_unthrottle,
1925 .chars_in_buffer = acm_tty_chars_in_buffer,
1926 .break_ctl = acm_tty_break_ctl,
1927 .set_termios = acm_tty_set_termios,
1928 .tiocmget = acm_tty_tiocmget,
1929 .tiocmset = acm_tty_tiocmset,
1930 };
1931
1932 /*
1933 * Init / exit.
1934 */
1935
acm_init(void)1936 static int __init acm_init(void)
1937 {
1938 int retval;
1939 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1940 if (!acm_tty_driver)
1941 return -ENOMEM;
1942 acm_tty_driver->driver_name = "acm",
1943 acm_tty_driver->name = "ttyACM",
1944 acm_tty_driver->major = ACM_TTY_MAJOR,
1945 acm_tty_driver->minor_start = 0,
1946 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1947 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1948 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1949 acm_tty_driver->init_termios = tty_std_termios;
1950 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1951 HUPCL | CLOCAL;
1952 tty_set_operations(acm_tty_driver, &acm_ops);
1953
1954 retval = tty_register_driver(acm_tty_driver);
1955 if (retval) {
1956 put_tty_driver(acm_tty_driver);
1957 return retval;
1958 }
1959
1960 retval = usb_register(&acm_driver);
1961 if (retval) {
1962 tty_unregister_driver(acm_tty_driver);
1963 put_tty_driver(acm_tty_driver);
1964 return retval;
1965 }
1966
1967 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1968
1969 return 0;
1970 }
1971
acm_exit(void)1972 static void __exit acm_exit(void)
1973 {
1974 usb_deregister(&acm_driver);
1975 tty_unregister_driver(acm_tty_driver);
1976 put_tty_driver(acm_tty_driver);
1977 }
1978
1979 module_init(acm_init);
1980 module_exit(acm_exit);
1981
1982 MODULE_AUTHOR(DRIVER_AUTHOR);
1983 MODULE_DESCRIPTION(DRIVER_DESC);
1984 MODULE_LICENSE("GPL");
1985 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
1986