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Merge 3.18-rc4 into usb-next.
[deliverable/linux.git] / drivers / usb / class / cdc-acm.c
CommitLineData
1da177e4
LT		 1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
a2531293 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
1da177e4
LT		 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>
61a87adf 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
088c64f8 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
1da177e4
LT		 11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
1da177e4
LT		 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
e5fbab51 32#undef VERBOSE_DEBUG
1da177e4
LT		 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>
7af25b4b 39#include <linux/serial.h>
1da177e4
LT		 40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
4186ecf8 43#include <linux/mutex.h>
10077d4a 44#include <linux/uaccess.h>
1da177e4 45#include <linux/usb.h>
a8c28f23 46#include <linux/usb/cdc.h>
1da177e4
LT		 47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
61a87adf 49#include <linux/list.h>
1da177e4
LT		 50
51#include "cdc-acm.h"
52
e5fbab51 53
088c64f8 54#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
1da177e4
LT		 55#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57static struct usb_driver acm_driver;
58static struct tty_driver *acm_tty_driver;
59static struct acm *acm_table[ACM_TTY_MINORS];
60
7fb57a01 61static DEFINE_MUTEX(acm_table_lock);
1da177e4 62
24cb4502
JP		 63static void acm_tty_set_termios(struct tty_struct *tty,
64 struct ktermios *termios_old);
65
7fb57a01
HS		 66/*
67 * acm_table accessors
68 */
1da177e4 69
7fb57a01
HS		 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 */
74static 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 */
97static 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'. */
114static 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}
739e0285 120
1da177e4
LT		 121/*
122 * Functions for ACM control messages.
123 */
124
6e47e069
AC		 125static int acm_ctrl_msg(struct acm *acm, int request, int value,
126 void *buf, int len)
1da177e4 127{
bae3f4c5
JH		 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),
1da177e4
LT		 135 request, USB_RT_ACM, value,
136 acm->control->altsetting[0].desc.bInterfaceNumber,
137 buf, len, 5000);
bae3f4c5 138
a5cc7ef9
JH		 139 dev_dbg(&acm->control->dev,
140 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
141 __func__, request, value, len, retval);
bae3f4c5
JH		 142
143 usb_autopm_put_interface(acm->control);
144
1da177e4
LT		 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 */
2a8cdfde
JH		 151static 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
1da177e4
LT		 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
884b600f
ON		 165/*
166 * Write buffer management.
167 * All of these assume proper locks taken by the caller.
168 */
169
170static int acm_wb_alloc(struct acm *acm)
171{
172 int i, wbn;
173 struct acm_wb *wb;
174
e4cf3aa8 175 wbn = 0;
884b600f
ON		 176 i = 0;
177 for (;;) {
178 wb = &acm->wb[wbn];
179 if (!wb->use) {
180 wb->use = 1;
181 return wbn;
182 }
86478944
ON		 183 wbn = (wbn + 1) % ACM_NW;
184 if (++i >= ACM_NW)
884b600f
ON		 185 return -1;
186 }
187}
188
884b600f
ON		 189static int acm_wb_is_avail(struct acm *acm)
190{
191 int i, n;
e5fbab51 192 unsigned long flags;
884b600f 193
86478944 194 n = ACM_NW;
e5fbab51 195 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 196 for (i = 0; i < ACM_NW; i++)
86478944 197 n -= acm->wb[i].use;
e5fbab51 198 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 199 return n;
200}
201
884b600f 202/*
ad0b65ef 203 * Finish write. Caller must hold acm->write_lock
884b600f 204 */
e4cf3aa8 205static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 206{
e4cf3aa8 207 wb->use = 0;
11ea859d 208 acm->transmitting--;
97d35f95 209 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 210}
211
212/*
213 * Poke write.
11ea859d
ON		 214 *
215 * the caller is responsible for locking
884b600f 216 */
11ea859d
ON		 217
218static 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
6e47e069
AC		 229 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
230 if (rc < 0) {
a5cc7ef9
JH		 231 dev_err(&acm->data->dev,
232 "%s - usb_submit_urb(write bulk) failed: %d\n",
233 __func__, rc);
11ea859d
ON		 234 acm_write_done(acm, wb);
235 }
236 return rc;
237}
238
c4cabd28
ON		 239/*
240 * attributes exported through sysfs
241 */
242static 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}
250static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
251
252static 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
262static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
263
264static 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}
884b600f 272
c4cabd28 273static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 274/*
275 * Interrupt handlers for various ACM device responses
276 */
277
278/* control interface reports status changes with "interrupt" transfers */
7d12e780 279static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 280{
281 struct acm *acm = urb->context;
282 struct usb_cdc_notification *dr = urb->transfer_buffer;
283 unsigned char *data;
284 int newctrl;
5a6a62bd 285 int difference;
185d4058
GKH		 286 int retval;
287 int status = urb->status;
1da177e4 288
185d4058 289 switch (status) {
1da177e4
LT		 290 case 0:
291 /* success */
292 break;
293 case -ECONNRESET:
294 case -ENOENT:
295 case -ESHUTDOWN:
296 /* this urb is terminated, clean up */
a5cc7ef9
JH		 297 dev_dbg(&acm->control->dev,
298 "%s - urb shutting down with status: %d\n",
299 __func__, status);
1da177e4
LT		 300 return;
301 default:
a5cc7ef9
JH		 302 dev_dbg(&acm->control->dev,
303 "%s - nonzero urb status received: %d\n",
304 __func__, status);
1da177e4
LT		 305 goto exit;
306 }
307
7e7797e7
JH		 308 usb_mark_last_busy(acm->dev);
309
1da177e4
LT		 310 data = (unsigned char *)(dr + 1);
311 switch (dr->bNotificationType) {
6e47e069 312 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
a5cc7ef9
JH		 313 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
314 __func__, dr->wValue);
6e47e069 315 break;
1da177e4 316
6e47e069 317 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 318 newctrl = get_unaligned_le16(data);
1da177e4 319
aa27a094
JS		 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);
6e47e069 324 }
1da177e4 325
5a6a62bd
ON		 326 difference = acm->ctrlin ^ newctrl;
327 spin_lock(&acm->read_lock);
6e47e069 328 acm->ctrlin = newctrl;
5a6a62bd
ON		 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);
1da177e4 349
5a6a62bd 350 break;
1da177e4 351
6e47e069 352 default:
a5cc7ef9
JH		 353 dev_dbg(&acm->control->dev,
354 "%s - unknown notification %d received: index %d "
355 "len %d data0 %d data1 %d\n",
356 __func__,
6e47e069
AC		 357 dr->bNotificationType, dr->wIndex,
358 dr->wLength, data[0], data[1]);
359 break;
1da177e4
LT		 360 }
361exit:
6e47e069 362 retval = usb_submit_urb(urb, GFP_ATOMIC);
185d4058 363 if (retval)
1d9846e5
JH		 364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
365 __func__, retval);
1da177e4
LT		 366}
367
088c64f8 368static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 369{
088c64f8 370 int res;
185d4058 371
088c64f8
JH		 372 if (!test_and_clear_bit(index, &acm->read_urbs_free))
373 return 0;
1da177e4 374
088c64f8
JH		 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;
11ea859d 386 }
1da177e4 387
088c64f8
JH		 388 return 0;
389}
1da177e4 390
088c64f8
JH		 391static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
392{
393 int res;
394 int i;
61a87adf 395
088c64f8
JH		 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;
86478944 400 }
088c64f8
JH		 401
402 return 0;
1da177e4
LT		 403}
404
088c64f8 405static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 406{
088c64f8 407 if (!urb->actual_length)
ca79b7b4 408 return;
61a87adf 409
05c7cd39
JS		 410 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
411 urb->actual_length);
2e124b4a 412 tty_flip_buffer_push(&acm->port);
088c64f8 413}
10077d4a 414
088c64f8
JH		 415static 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;
61a87adf 420
088c64f8
JH		 421 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
422 rb->index, urb->actual_length);
423 set_bit(rb->index, &acm->read_urbs_free);
61a87adf 424
088c64f8
JH		 425 if (!acm->dev) {
426 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
427 return;
428 }
61a87adf 429
088c64f8
JH		 430 if (urb->status) {
431 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
432 __func__, urb->status);
433 return;
61a87adf 434 }
4a8ee505
JH		 435
436 usb_mark_last_busy(acm->dev);
437
088c64f8
JH		 438 acm_process_read_urb(acm, urb);
439
440 /* throttle device if requested by tty */
11ea859d 441 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8 442 acm->throttled = acm->throttle_req;
bbf0cb3e 443 if (!acm->throttled) {
088c64f8
JH		 444 spin_unlock_irqrestore(&acm->read_lock, flags);
445 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
446 } else {
447 spin_unlock_irqrestore(&acm->read_lock, flags);
448 }
1da177e4
LT		 449}
450
451/* data interface wrote those outgoing bytes */
7d12e780 452static void acm_write_bulk(struct urb *urb)
1da177e4 453{
cdc97792 454 struct acm_wb *wb = urb->context;
e5fbab51 455 struct acm *acm = wb->instance;
ad0b65ef 456 unsigned long flags;
1da177e4 457
4fa4626c
JH		 458 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
459 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
1d9846e5 460 __func__,
e5fbab51
DB		 461 urb->actual_length,
462 urb->transfer_buffer_length,
463 urb->status);
1da177e4 464
ad0b65ef 465 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 466 acm_write_done(acm, wb);
ad0b65ef 467 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 468 schedule_work(&acm->work);
1da177e4
LT		 469}
470
c4028958 471static void acm_softint(struct work_struct *work)
1da177e4 472{
c4028958 473 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 474
1d9846e5
JH		 475 dev_vdbg(&acm->data->dev, "%s\n", __func__);
476
6aad04f2 477 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 478}
479
480/*
481 * TTY handlers
482 */
483
7fb57a01 484static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 485{
486 struct acm *acm;
7fb57a01 487 int retval;
1da177e4 488
7fb57a01 489 dev_dbg(tty->dev, "%s\n", __func__);
1da177e4 490
7fb57a01
HS		 491 acm = acm_get_by_index(tty->index);
492 if (!acm)
493 return -ENODEV;
a5cc7ef9 494
f8a8c10f 495 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 496 if (retval)
497 goto error_init_termios;
10077d4a 498
1da177e4 499 tty->driver_data = acm;
1da177e4 500
7fb57a01
HS		 501 return 0;
502
503error_init_termios:
504 tty_port_put(&acm->port);
505 return retval;
506}
507
508static int acm_tty_open(struct tty_struct *tty, struct file *filp)
509{
510 struct acm *acm = tty->driver_data;
511
512 dev_dbg(tty->dev, "%s\n", __func__);
513
514 return tty_port_open(&acm->port, tty, filp);
515}
516
0943d8ea
JH		 517static void acm_port_dtr_rts(struct tty_port *port, int raise)
518{
519 struct acm *acm = container_of(port, struct acm, port);
520 int val;
521 int res;
522
523 if (raise)
524 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
525 else
526 val = 0;
527
528 /* FIXME: add missing ctrlout locking throughout driver */
529 acm->ctrlout = val;
530
531 res = acm_set_control(acm, val);
532 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
533 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
534}
535
7fb57a01
HS		 536static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
537{
538 struct acm *acm = container_of(port, struct acm, port);
539 int retval = -ENODEV;
e4c36076 540 int i;
7fb57a01
HS		 541
542 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 543
544 mutex_lock(&acm->mutex);
7fb57a01
HS		 545 if (acm->disconnected)
546 goto disconnected;
547
548 retval = usb_autopm_get_interface(acm->control);
549 if (retval)
550 goto error_get_interface;
551
552 /*
553 * FIXME: Why do we need this? Allocating 64K of physically contiguous
554 * memory is really nasty...
555 */
556 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
557 acm->control->needs_remote_wakeup = 1;
1365baf7 558
1da177e4 559 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 560 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
561 if (retval) {
a5cc7ef9
JH		 562 dev_err(&acm->control->dev,
563 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 564 goto error_submit_urb;
1da177e4
LT		 565 }
566
24cb4502
JP		 567 acm_tty_set_termios(tty, NULL);
568
6c4707f3
OM		 569 /*
570 * Unthrottle device in case the TTY was closed while throttled.
571 */
572 spin_lock_irq(&acm->read_lock);
573 acm->throttled = 0;
574 acm->throttle_req = 0;
575 spin_unlock_irq(&acm->read_lock);
576
8727bf68
JH		 577 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
578 if (retval)
7fb57a01 579 goto error_submit_read_urbs;
2b626dc1 580
703df329
JH		 581 usb_autopm_put_interface(acm->control);
582
1365baf7 583 mutex_unlock(&acm->mutex);
1da177e4 584
7fb57a01
HS		 585 return 0;
586
587error_submit_read_urbs:
e4c36076
JH		 588 for (i = 0; i < acm->rx_buflimit; i++)
589 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 590 usb_kill_urb(acm->ctrlurb);
591error_submit_urb:
703df329 592 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 593error_get_interface:
594disconnected:
595 mutex_unlock(&acm->mutex);
8727bf68
JH		 596
597 return usb_translate_errors(retval);
1da177e4
LT		 598}
599
7fb57a01 600static void acm_port_destruct(struct tty_port *port)
83ef344a 601{
7fb57a01
HS		 602 struct acm *acm = container_of(port, struct acm, port);
603
604 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 605
7fb57a01 606 acm_release_minor(acm);
83ef344a 607 usb_put_intf(acm->control);
c4cabd28 608 kfree(acm->country_codes);
83ef344a 609 kfree(acm);
610}
611
7fb57a01 612static void acm_port_shutdown(struct tty_port *port)
10077d4a 613{
7fb57a01 614 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 615 struct urb *urb;
616 struct acm_wb *wb;
dab54c9f
JH		 617 int i;
618
7fb57a01
HS		 619 dev_dbg(&acm->control->dev, "%s\n", __func__);
620
b1d42efc
JH		 621 /*
622 * Need to grab write_lock to prevent race with resume, but no need to
623 * hold it due to the tty-port initialised flag.
624 */
625 spin_lock_irq(&acm->write_lock);
626 spin_unlock_irq(&acm->write_lock);
627
628 usb_autopm_get_interface_no_resume(acm->control);
629 acm->control->needs_remote_wakeup = 0;
630 usb_autopm_put_interface(acm->control);
631
89e54e44
JH		 632 for (;;) {
633 urb = usb_get_from_anchor(&acm->delayed);
634 if (!urb)
635 break;
636 wb = urb->context;
637 wb->use = 0;
638 usb_autopm_put_interface_async(acm->control);
10077d4a 639 }
89e54e44
JH		 640
641 usb_kill_urb(acm->ctrlurb);
642 for (i = 0; i < ACM_NW; i++)
643 usb_kill_urb(acm->wb[i].urb);
644 for (i = 0; i < acm->rx_buflimit; i++)
645 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 646}
647
648static void acm_tty_cleanup(struct tty_struct *tty)
649{
650 struct acm *acm = tty->driver_data;
651 dev_dbg(&acm->control->dev, "%s\n", __func__);
652 tty_port_put(&acm->port);
10077d4a
AC		 653}
654
655static void acm_tty_hangup(struct tty_struct *tty)
656{
657 struct acm *acm = tty->driver_data;
7fb57a01 658 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 659 tty_port_hangup(&acm->port);
10077d4a
AC		 660}
661
1da177e4
LT		 662static void acm_tty_close(struct tty_struct *tty, struct file *filp)
663{
664 struct acm *acm = tty->driver_data;
7fb57a01
HS		 665 dev_dbg(&acm->control->dev, "%s\n", __func__);
666 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 667}
668
6e47e069
AC		 669static int acm_tty_write(struct tty_struct *tty,
670 const unsigned char *buf, int count)
1da177e4
LT		 671{
672 struct acm *acm = tty->driver_data;
673 int stat;
884b600f
ON		 674 unsigned long flags;
675 int wbn;
676 struct acm_wb *wb;
677
1da177e4
LT		 678 if (!count)
679 return 0;
680
5e9e75f8 681 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 682
884b600f 683 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 684 wbn = acm_wb_alloc(acm);
685 if (wbn < 0) {
884b600f 686 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 687 return 0;
688 }
689 wb = &acm->wb[wbn];
1da177e4 690
71c2fb03
GKH		 691 if (!acm->dev) {
692 wb->use = 0;
693 spin_unlock_irqrestore(&acm->write_lock, flags);
694 return -ENODEV;
695 }
696
884b600f 697 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 698 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 699 memcpy(wb->buf, buf, count);
700 wb->len = count;
71c2fb03 701
183a4508
JH		 702 stat = usb_autopm_get_interface_async(acm->control);
703 if (stat) {
704 wb->use = 0;
705 spin_unlock_irqrestore(&acm->write_lock, flags);
706 return stat;
707 }
708
71c2fb03 709 if (acm->susp_count) {
140cb81a 710 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 711 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 712 return count;
71c2fb03 713 }
71c2fb03
GKH		 714
715 stat = acm_start_wb(acm, wb);
884b600f 716 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 717
6e47e069 718 if (stat < 0)
1da177e4 719 return stat;
1da177e4
LT		 720 return count;
721}
722
723static int acm_tty_write_room(struct tty_struct *tty)
724{
725 struct acm *acm = tty->driver_data;
884b600f
ON		 726 /*
727 * Do not let the line discipline to know that we have a reserve,
728 * or it might get too enthusiastic.
729 */
934da463 730 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 731}
732
733static int acm_tty_chars_in_buffer(struct tty_struct *tty)
734{
735 struct acm *acm = tty->driver_data;
7fb57a01
HS		 736 /*
737 * if the device was unplugged then any remaining characters fell out
738 * of the connector ;)
739 */
740 if (acm->disconnected)
23198fda 741 return 0;
884b600f
ON		 742 /*
743 * This is inaccurate (overcounts), but it works.
744 */
86478944 745 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 746}
747
748static void acm_tty_throttle(struct tty_struct *tty)
749{
750 struct acm *acm = tty->driver_data;
088c64f8 751
088c64f8
JH		 752 spin_lock_irq(&acm->read_lock);
753 acm->throttle_req = 1;
754 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 755}
756
757static void acm_tty_unthrottle(struct tty_struct *tty)
758{
759 struct acm *acm = tty->driver_data;
088c64f8
JH		 760 unsigned int was_throttled;
761
088c64f8
JH		 762 spin_lock_irq(&acm->read_lock);
763 was_throttled = acm->throttled;
764 acm->throttled = 0;
765 acm->throttle_req = 0;
766 spin_unlock_irq(&acm->read_lock);
767
768 if (was_throttled)
769 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 770}
771
9e98966c 772static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 773{
774 struct acm *acm = tty->driver_data;
9e98966c 775 int retval;
7fb57a01 776
9e98966c
AC		 777 retval = acm_send_break(acm, state ? 0xffff : 0);
778 if (retval < 0)
a5cc7ef9
JH		 779 dev_dbg(&acm->control->dev, "%s - send break failed\n",
780 __func__);
9e98966c 781 return retval;
1da177e4
LT		 782}
783
60b33c13 784static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 785{
786 struct acm *acm = tty->driver_data;
787
1da177e4
LT		 788 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
789 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
790 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
791 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
792 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
793 TIOCM_CTS;
794}
795
20b9d177 796static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 797 unsigned int set, unsigned int clear)
798{
799 struct acm *acm = tty->driver_data;
800 unsigned int newctrl;
801
1da177e4 802 newctrl = acm->ctrlout;
6e47e069
AC		 803 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
804 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
805 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
806 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 807
808 newctrl = (newctrl & ~clear) | set;
809
810 if (acm->ctrlout == newctrl)
811 return 0;
812 return acm_set_control(acm, acm->ctrlout = newctrl);
813}
814
18c75720
ON		 815static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
816{
817 struct serial_struct tmp;
818
819 if (!info)
820 return -EINVAL;
821
822 memset(&tmp, 0, sizeof(tmp));
823 tmp.flags = ASYNC_LOW_LATENCY;
824 tmp.xmit_fifo_size = acm->writesize;
825 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 826 tmp.close_delay = acm->port.close_delay / 10;
827 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
828 ASYNC_CLOSING_WAIT_NONE :
829 acm->port.closing_wait / 10;
18c75720
ON		 830
831 if (copy_to_user(info, &tmp, sizeof(tmp)))
832 return -EFAULT;
833 else
834 return 0;
835}
836
ba2d8ce9
DW		 837static int set_serial_info(struct acm *acm,
838 struct serial_struct __user *newinfo)
839{
840 struct serial_struct new_serial;
841 unsigned int closing_wait, close_delay;
842 int retval = 0;
843
844 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
845 return -EFAULT;
846
847 close_delay = new_serial.close_delay * 10;
848 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
849 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
850
851 mutex_lock(&acm->port.mutex);
852
853 if (!capable(CAP_SYS_ADMIN)) {
854 if ((close_delay != acm->port.close_delay) ||
855 (closing_wait != acm->port.closing_wait))
856 retval = -EPERM;
857 else
858 retval = -EOPNOTSUPP;
859 } else {
860 acm->port.close_delay = close_delay;
861 acm->port.closing_wait = closing_wait;
862 }
863
864 mutex_unlock(&acm->port.mutex);
865 return retval;
866}
867
5a6a62bd
ON		 868static int wait_serial_change(struct acm *acm, unsigned long arg)
869{
870 int rv = 0;
871 DECLARE_WAITQUEUE(wait, current);
872 struct async_icount old, new;
873
874 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
875 return -EINVAL;
876 do {
877 spin_lock_irq(&acm->read_lock);
878 old = acm->oldcount;
879 new = acm->iocount;
880 acm->oldcount = new;
881 spin_unlock_irq(&acm->read_lock);
882
883 if ((arg & TIOCM_DSR) &&
884 old.dsr != new.dsr)
885 break;
886 if ((arg & TIOCM_CD) &&
887 old.dcd != new.dcd)
888 break;
889 if ((arg & TIOCM_RI) &&
890 old.rng != new.rng)
891 break;
892
893 add_wait_queue(&acm->wioctl, &wait);
894 set_current_state(TASK_INTERRUPTIBLE);
895 schedule();
896 remove_wait_queue(&acm->wioctl, &wait);
897 if (acm->disconnected) {
898 if (arg & TIOCM_CD)
899 break;
900 else
901 rv = -ENODEV;
902 } else {
903 if (signal_pending(current))
904 rv = -ERESTARTSYS;
905 }
906 } while (!rv);
907
908
909
910 return rv;
911}
912
797ef137
ON		 913static int get_serial_usage(struct acm *acm,
914 struct serial_icounter_struct __user *count)
915{
916 struct serial_icounter_struct icount;
917 int rv = 0;
918
919 memset(&icount, 0, sizeof(icount));
920 icount.dsr = acm->iocount.dsr;
921 icount.rng = acm->iocount.rng;
922 icount.dcd = acm->iocount.dcd;
923 icount.frame = acm->iocount.frame;
924 icount.overrun = acm->iocount.overrun;
925 icount.parity = acm->iocount.parity;
926 icount.brk = acm->iocount.brk;
927
928 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
929 rv = -EFAULT;
930
931 return rv;
932}
933
6caa76b7 934static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 935 unsigned int cmd, unsigned long arg)
1da177e4 936{
18c75720
ON		 937 struct acm *acm = tty->driver_data;
938 int rv = -ENOIOCTLCMD;
939
940 switch (cmd) {
941 case TIOCGSERIAL: /* gets serial port data */
942 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 943 break;
944 case TIOCSSERIAL:
945 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 946 break;
5a6a62bd 947 case TIOCMIWAIT:
8fdbeb26
ON		 948 rv = usb_autopm_get_interface(acm->control);
949 if (rv < 0) {
950 rv = -EIO;
951 break;
952 }
5a6a62bd 953 rv = wait_serial_change(acm, arg);
8fdbeb26 954 usb_autopm_put_interface(acm->control);
5a6a62bd 955 break;
797ef137
ON		 956 case TIOCGICOUNT:
957 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
958 break;
18c75720
ON		 959 }
960
961 return rv;
1da177e4
LT		 962}
963
6e47e069
AC		 964static void acm_tty_set_termios(struct tty_struct *tty,
965 struct ktermios *termios_old)
1da177e4
LT		 966{
967 struct acm *acm = tty->driver_data;
adc8d746 968 struct ktermios *termios = &tty->termios;
1da177e4
LT		 969 struct usb_cdc_line_coding newline;
970 int newctrl = acm->ctrlout;
971
9b80fee1 972 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 973 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
974 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 975 (termios->c_cflag & PARODD ? 1 : 2) +
976 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 977 switch (termios->c_cflag & CSIZE) {
978 case CS5:
979 newline.bDataBits = 5;
980 break;
981 case CS6:
982 newline.bDataBits = 6;
983 break;
984 case CS7:
985 newline.bDataBits = 7;
986 break;
987 case CS8:
988 default:
989 newline.bDataBits = 8;
990 break;
991 }
6e47e069 992 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 993 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
994
4473d054 995 if (C_BAUD(tty) == B0) {
1da177e4
LT		 996 newline.dwDTERate = acm->line.dwDTERate;
997 newctrl &= ~ACM_CTRL_DTR;
4473d054 998 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
6e47e069 999 newctrl |= ACM_CTRL_DTR;
4473d054 1000 }
1da177e4
LT		 1001
1002 if (newctrl != acm->ctrlout)
1003 acm_set_control(acm, acm->ctrlout = newctrl);
1004
1005 if (memcmp(&acm->line, &newline, sizeof newline)) {
1006 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 1007 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1008 __func__,
1009 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 1010 newline.bCharFormat, newline.bParityType,
1011 newline.bDataBits);
1012 acm_set_line(acm, &acm->line);
1013 }
1014}
1015
7fb57a01 1016static const struct tty_port_operations acm_port_ops = {
0943d8ea 1017 .dtr_rts = acm_port_dtr_rts,
7fb57a01
HS		 1018 .shutdown = acm_port_shutdown,
1019 .activate = acm_port_activate,
1020 .destruct = acm_port_destruct,
1021};
1022
1da177e4
LT		 1023/*
1024 * USB probe and disconnect routines.
1025 */
1026
830f4021 1027/* Little helpers: write/read buffers free */
884b600f
ON		 1028static void acm_write_buffers_free(struct acm *acm)
1029{
1030 int i;
1031 struct acm_wb *wb;
a496c64f 1032 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1033
6e47e069 1034 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1035 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1036}
1037
830f4021
ON		 1038static void acm_read_buffers_free(struct acm *acm)
1039{
1040 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1041 int i;
830f4021 1042
dab54c9f 1043 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1044 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1045 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1046}
1047
884b600f
ON		 1048/* Little helper: write buffers allocate */
1049static int acm_write_buffers_alloc(struct acm *acm)
1050{
1051 int i;
1052 struct acm_wb *wb;
1053
86478944 1054 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1055 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1056 &wb->dmah);
1057 if (!wb->buf) {
1058 while (i != 0) {
1059 --i;
1060 --wb;
997ea58e 1061 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1062 wb->buf, wb->dmah);
1063 }
1064 return -ENOMEM;
1065 }
1066 }
1067 return 0;
1068}
1069
10077d4a
AC		 1070static int acm_probe(struct usb_interface *intf,
1071 const struct usb_device_id *id)
1da177e4
LT		 1072{
1073 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1074 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1075 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1076 int buflen = intf->altsetting->extralen;
1077 struct usb_interface *control_interface;
1078 struct usb_interface *data_interface;
a2bfb4a3
ON		 1079 struct usb_endpoint_descriptor *epctrl = NULL;
1080 struct usb_endpoint_descriptor *epread = NULL;
1081 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1082 struct usb_device *usb_dev = interface_to_usbdev(intf);
1083 struct acm *acm;
1084 int minor;
6e47e069 1085 int ctrlsize, readsize;
1da177e4
LT		 1086 u8 *buf;
1087 u8 ac_management_function = 0;
1088 u8 call_management_function = 0;
1089 int call_interface_num = -1;
fd5054c1 1090 int data_interface_num = -1;
1da177e4 1091 unsigned long quirks;
86478944 1092 int num_rx_buf;
61a87adf 1093 int i;
a2bfb4a3 1094 int combined_interfaces = 0;
c93d8195
AK		 1095 struct device *tty_dev;
1096 int rv = -ENOMEM;
1da177e4 1097
86478944 1098 /* normal quirks */
1da177e4 1099 quirks = (unsigned long)id->driver_info;
16142655
DT		 1100
1101 if (quirks == IGNORE_DEVICE)
1102 return -ENODEV;
1103
86478944
ON		 1104 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1105
1106 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1107 if (quirks == NO_UNION_NORMAL) {
1108 data_interface = usb_ifnum_to_if(usb_dev, 1);
1109 control_interface = usb_ifnum_to_if(usb_dev, 0);
1110 goto skip_normal_probe;
1111 }
6e47e069 1112
1da177e4
LT		 1113 /* normal probing*/
1114 if (!buffer) {
9908a32e 1115 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1116 return -EINVAL;
1117 }
1118
1119 if (!buflen) {
577045c0
TG		 1120 if (intf->cur_altsetting->endpoint &&
1121 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1122 intf->cur_altsetting->endpoint->extra) {
1123 dev_dbg(&intf->dev,
1124 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1125 buflen = intf->cur_altsetting->endpoint->extralen;
1126 buffer = intf->cur_altsetting->endpoint->extra;
1127 } else {
9908a32e
GKH		 1128 dev_err(&intf->dev,
1129 "Zero length descriptor references\n");
1da177e4
LT		 1130 return -EINVAL;
1131 }
1132 }
1133
1134 while (buflen > 0) {
6e47e069 1135 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1136 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1137 goto next_desc;
1138 }
1139
6e47e069
AC		 1140 switch (buffer[2]) {
1141 case USB_CDC_UNION_TYPE: /* we've found it */
1142 if (union_header) {
1143 dev_err(&intf->dev, "More than one "
1144 "union descriptor, skipping ...\n");
1145 goto next_desc;
1da177e4 1146 }
6e47e069
AC		 1147 union_header = (struct usb_cdc_union_desc *)buffer;
1148 break;
1149 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1150 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1151 break;
1152 case USB_CDC_HEADER_TYPE: /* maybe check version */
1153 break; /* for now we ignore it */
1154 case USB_CDC_ACM_TYPE:
1155 ac_management_function = buffer[3];
1156 break;
1157 case USB_CDC_CALL_MANAGEMENT_TYPE:
1158 call_management_function = buffer[3];
1159 call_interface_num = buffer[4];
6e47e069
AC		 1160 break;
1161 default:
1162 /* there are LOTS more CDC descriptors that
1163 * could legitimately be found here.
1164 */
1165 dev_dbg(&intf->dev, "Ignoring descriptor: "
1166 "type %02x, length %d\n",
1167 buffer[2], buffer[0]);
1168 break;
1169 }
1da177e4
LT		 1170next_desc:
1171 buflen -= buffer[0];
1172 buffer += buffer[0];
1173 }
1174
1175 if (!union_header) {
1176 if (call_interface_num > 0) {
6e47e069 1177 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1178 /* quirks for Droids MuIn LCD */
1179 if (quirks & NO_DATA_INTERFACE)
1180 data_interface = usb_ifnum_to_if(usb_dev, 0);
1181 else
1182 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1183 control_interface = intf;
1184 } else {
a2bfb4a3
ON		 1185 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1186 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1187 return -ENODEV;
1188 } else {
1189 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1190 combined_interfaces = 1;
1191 control_interface = data_interface = intf;
1192 goto look_for_collapsed_interface;
1193 }
1da177e4
LT		 1194 }
1195 } else {
1196 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1197 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1198 if (!control_interface || !data_interface) {
6e47e069 1199 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1200 return -ENODEV;
1201 }
1202 }
6e47e069 1203
1da177e4 1204 if (data_interface_num != call_interface_num)
6e47e069 1205 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1206
a2bfb4a3
ON		 1207 if (control_interface == data_interface) {
1208 /* some broken devices designed for windows work this way */
1209 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1210 combined_interfaces = 1;
1211 /* a popular other OS doesn't use it */
1212 quirks |= NO_CAP_LINE;
1213 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1214 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1215 return -EINVAL;
1216 }
1217look_for_collapsed_interface:
1218 for (i = 0; i < 3; i++) {
1219 struct usb_endpoint_descriptor *ep;
1220 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1221
1222 if (usb_endpoint_is_int_in(ep))
1223 epctrl = ep;
1224 else if (usb_endpoint_is_bulk_out(ep))
1225 epwrite = ep;
1226 else if (usb_endpoint_is_bulk_in(ep))
1227 epread = ep;
1228 else
1229 return -EINVAL;
1230 }
1231 if (!epctrl || !epread || !epwrite)
1232 return -ENODEV;
1233 else
1234 goto made_compressed_probe;
1235 }
1236
1da177e4
LT		 1237skip_normal_probe:
1238
1239 /*workaround for switched interfaces */
6e47e069
AC		 1240 if (data_interface->cur_altsetting->desc.bInterfaceClass
1241 != CDC_DATA_INTERFACE_TYPE) {
1242 if (control_interface->cur_altsetting->desc.bInterfaceClass
1243 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1244 struct usb_interface *t;
6e47e069
AC		 1245 dev_dbg(&intf->dev,
1246 "Your device has switched interfaces.\n");
1da177e4
LT		 1247 t = control_interface;
1248 control_interface = data_interface;
1249 data_interface = t;
1250 } else {
1251 return -EINVAL;
1252 }
1253 }
74da5d68
AS		 1254
1255 /* Accept probe requests only for the control interface */
a2bfb4a3 1256 if (!combined_interfaces && intf != control_interface)
74da5d68 1257 return -ENODEV;
6e47e069 1258
a2bfb4a3
ON		 1259 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1260 /* valid in this context */
6e47e069 1261 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1262 return -EBUSY;
1263 }
1264
1265
99f347ca
SS		 1266 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1267 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1268 return -EINVAL;
1269
1270 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1271 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1272 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1273
1274
1275 /* workaround for switched endpoints */
45aea704 1276 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1277 /* descriptors are swapped */
1278 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1279 dev_dbg(&intf->dev,
1280 "The data interface has switched endpoints\n");
1da177e4
LT		 1281 t = epread;
1282 epread = epwrite;
1283 epwrite = t;
1284 }
a2bfb4a3 1285made_compressed_probe:
a5cc7ef9 1286 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1287
6e47e069
AC		 1288 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1289 if (acm == NULL) {
255ab56c 1290 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1291 goto alloc_fail;
1292 }
1da177e4 1293
7fb57a01
HS		 1294 minor = acm_alloc_minor(acm);
1295 if (minor == ACM_TTY_MINORS) {
1296 dev_err(&intf->dev, "no more free acm devices\n");
1297 kfree(acm);
1298 return -ENODEV;
1299 }
1300
29cc8897
KM		 1301 ctrlsize = usb_endpoint_maxp(epctrl);
1302 readsize = usb_endpoint_maxp(epread) *
6e47e069 1303 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1304 acm->combined_interfaces = combined_interfaces;
29cc8897 1305 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1306 acm->control = control_interface;
1307 acm->data = data_interface;
1308 acm->minor = minor;
1309 acm->dev = usb_dev;
1310 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1311 if (quirks & NO_CAP_LINE)
1312 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1313 acm->ctrlsize = ctrlsize;
1314 acm->readsize = readsize;
86478944 1315 acm->rx_buflimit = num_rx_buf;
c4028958 1316 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1317 init_waitqueue_head(&acm->wioctl);
884b600f 1318 spin_lock_init(&acm->write_lock);
61a87adf 1319 spin_lock_init(&acm->read_lock);
1365baf7 1320 mutex_init(&acm->mutex);
61a87adf 1321 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1322 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1323 if (acm->is_int_ep)
1324 acm->bInterval = epread->bInterval;
739e0285
AC		 1325 tty_port_init(&acm->port);
1326 acm->port.ops = &acm_port_ops;
140cb81a 1327 init_usb_anchor(&acm->delayed);
2a8cdfde 1328 acm->quirks = quirks;
1da177e4 1329
997ea58e 1330 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1331 if (!buf) {
255ab56c 1332 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1333 goto alloc_fail2;
1334 }
1335 acm->ctrl_buffer = buf;
1336
884b600f 1337 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1338 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1339 goto alloc_fail4;
1340 }
1da177e4
LT		 1341
1342 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1343 if (!acm->ctrlurb) {
255ab56c 1344 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1345 goto alloc_fail5;
1346 }
86478944 1347 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1348 struct acm_rb *rb = &(acm->read_buffers[i]);
1349 struct urb *urb;
61a87adf 1350
74f5e1ba
JH		 1351 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1352 &rb->dma);
1353 if (!rb->base) {
1354 dev_err(&intf->dev, "out of memory "
1355 "(read bufs usb_alloc_coherent)\n");
1356 goto alloc_fail6;
1357 }
088c64f8
JH		 1358 rb->index = i;
1359 rb->instance = acm;
74f5e1ba 1360
088c64f8
JH		 1361 urb = usb_alloc_urb(0, GFP_KERNEL);
1362 if (!urb) {
255ab56c 1363 dev_err(&intf->dev,
6e47e069 1364 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1365 goto alloc_fail6;
61a87adf 1366 }
088c64f8
JH		 1367 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1368 urb->transfer_dma = rb->dma;
1369 if (acm->is_int_ep) {
1370 usb_fill_int_urb(urb, acm->dev,
1371 acm->rx_endpoint,
1372 rb->base,
1373 acm->readsize,
1374 acm_read_bulk_callback, rb,
1375 acm->bInterval);
1376 } else {
1377 usb_fill_bulk_urb(urb, acm->dev,
1378 acm->rx_endpoint,
1379 rb->base,
1380 acm->readsize,
1381 acm_read_bulk_callback, rb);
1382 }
61a87adf 1383
088c64f8
JH		 1384 acm->read_urbs[i] = urb;
1385 __set_bit(i, &acm->read_urbs_free);
61a87adf 1386 }
6e47e069 1387 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1388 struct acm_wb *snd = &(acm->wb[i]);
1389
6e47e069
AC		 1390 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1391 if (snd->urb == NULL) {
255ab56c 1392 dev_err(&intf->dev,
59d7fec7 1393 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1394 goto alloc_fail7;
e4cf3aa8
DE		 1395 }
1396
5186ffee
AL		 1397 if (usb_endpoint_xfer_int(epwrite))
1398 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1399 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1400 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1401 else
1402 usb_fill_bulk_urb(snd->urb, usb_dev,
1403 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1404 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1405 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1406 snd->instance = acm;
1da177e4
LT		 1407 }
1408
6e47e069 1409 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1410
1411 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1412 if (i < 0)
74f5e1ba 1413 goto alloc_fail7;
c4cabd28
ON		 1414
1415 if (cfd) { /* export the country data */
1416 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1417 if (!acm->country_codes)
1418 goto skip_countries;
1419 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1420 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1421 cfd->bLength - 4);
c4cabd28
ON		 1422 acm->country_rel_date = cfd->iCountryCodeRelDate;
1423
1424 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1425 if (i < 0) {
1426 kfree(acm->country_codes);
e7c8e860
JL		 1427 acm->country_codes = NULL;
1428 acm->country_code_size = 0;
c4cabd28
ON		 1429 goto skip_countries;
1430 }
1431
6e47e069
AC		 1432 i = device_create_file(&intf->dev,
1433 &dev_attr_iCountryCodeRelDate);
c4cabd28 1434 if (i < 0) {
c2572b78 1435 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1436 kfree(acm->country_codes);
e7c8e860
JL		 1437 acm->country_codes = NULL;
1438 acm->country_code_size = 0;
c4cabd28
ON		 1439 goto skip_countries;
1440 }
1441 }
1442
1443skip_countries:
6e47e069 1444 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1445 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1446 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1447 /* works around buggy devices */
d102e78f 1448 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1449 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1450 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1451
1da177e4
LT		 1452 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1453
1da177e4
LT		 1454 acm->line.dwDTERate = cpu_to_le32(9600);
1455 acm->line.bDataBits = 8;
1456 acm_set_line(acm, &acm->line);
1457
1458 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1459 usb_set_intfdata(data_interface, acm);
1da177e4 1460
83ef344a 1461 usb_get_intf(control_interface);
c93d8195 1462 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1463 &control_interface->dev);
c93d8195
AK		 1464 if (IS_ERR(tty_dev)) {
1465 rv = PTR_ERR(tty_dev);
1466 goto alloc_fail8;
1467 }
1da177e4 1468
c4cabd28 1469 return 0;
c93d8195
AK		 1470alloc_fail8:
1471 if (acm->country_codes) {
1472 device_remove_file(&acm->control->dev,
1473 &dev_attr_wCountryCodes);
1474 device_remove_file(&acm->control->dev,
1475 &dev_attr_iCountryCodeRelDate);
1476 }
1477 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1478alloc_fail7:
c93d8195 1479 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1480 for (i = 0; i < ACM_NW; i++)
1481 usb_free_urb(acm->wb[i].urb);
c2572b78 1482alloc_fail6:
86478944 1483 for (i = 0; i < num_rx_buf; i++)
088c64f8 1484 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1485 acm_read_buffers_free(acm);
1da177e4
LT		 1486 usb_free_urb(acm->ctrlurb);
1487alloc_fail5:
884b600f 1488 acm_write_buffers_free(acm);
1da177e4 1489alloc_fail4:
997ea58e 1490 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1491alloc_fail2:
7fb57a01 1492 acm_release_minor(acm);
1da177e4
LT		 1493 kfree(acm);
1494alloc_fail:
c93d8195 1495 return rv;
1da177e4
LT		 1496}
1497
1365baf7
ON		 1498static void stop_data_traffic(struct acm *acm)
1499{
1500 int i;
a5cc7ef9
JH		 1501
1502 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1503
1365baf7 1504 usb_kill_urb(acm->ctrlurb);
6e47e069 1505 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1506 usb_kill_urb(acm->wb[i].urb);
1365baf7 1507 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1508 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1509
1510 cancel_work_sync(&acm->work);
1511}
1512
1da177e4
LT		 1513static void acm_disconnect(struct usb_interface *intf)
1514{
c4cabd28 1515 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1516 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1517 struct tty_struct *tty;
7fb57a01
HS		 1518 int i;
1519
1520 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1521
672c4e18
DB		 1522 /* sibling interface is already cleaning up */
1523 if (!acm)
86067eea 1524 return;
672c4e18 1525
7fb57a01
HS		 1526 mutex_lock(&acm->mutex);
1527 acm->disconnected = true;
6e47e069 1528 if (acm->country_codes) {
74da5d68
AS		 1529 device_remove_file(&acm->control->dev,
1530 &dev_attr_wCountryCodes);
1531 device_remove_file(&acm->control->dev,
1532 &dev_attr_iCountryCodeRelDate);
c4cabd28 1533 }
5a6a62bd 1534 wake_up_all(&acm->wioctl);
74da5d68 1535 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1536 usb_set_intfdata(acm->control, NULL);
1537 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1538 mutex_unlock(&acm->mutex);
1539
1540 tty = tty_port_tty_get(&acm->port);
1541 if (tty) {
1542 tty_vhangup(tty);
1543 tty_kref_put(tty);
1544 }
1da177e4 1545
1365baf7 1546 stop_data_traffic(acm);
1da177e4 1547
cb25505f
JH		 1548 tty_unregister_device(acm_tty_driver, acm->minor);
1549
7fb57a01
HS		 1550 usb_free_urb(acm->ctrlurb);
1551 for (i = 0; i < ACM_NW; i++)
1552 usb_free_urb(acm->wb[i].urb);
1553 for (i = 0; i < acm->rx_buflimit; i++)
1554 usb_free_urb(acm->read_urbs[i]);
884b600f 1555 acm_write_buffers_free(acm);
7fb57a01 1556 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1557 acm_read_buffers_free(acm);
1da177e4 1558
a2bfb4a3
ON		 1559 if (!acm->combined_interfaces)
1560 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1561 acm->data : acm->control);
1da177e4 1562
7fb57a01 1563 tty_port_put(&acm->port);
1da177e4
LT		 1564}
1565
35758589 1566#ifdef CONFIG_PM
1365baf7
ON		 1567static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1568{
1569 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1570 int cnt;
1571
bbf0cb3e 1572 spin_lock_irq(&acm->write_lock);
5b1b0b81 1573 if (PMSG_IS_AUTO(message)) {
5a345c20 1574 if (acm->transmitting) {
bbf0cb3e 1575 spin_unlock_irq(&acm->write_lock);
11ea859d 1576 return -EBUSY;
5a345c20 1577 }
11ea859d 1578 }
11ea859d 1579 cnt = acm->susp_count++;
bbf0cb3e 1580 spin_unlock_irq(&acm->write_lock);
1365baf7 1581
11ea859d 1582 if (cnt)
1365baf7 1583 return 0;
1365baf7 1584
ed797074 1585 stop_data_traffic(acm);
1365baf7 1586
1365baf7
ON		 1587 return 0;
1588}
1589
1590static int acm_resume(struct usb_interface *intf)
1591{
1592 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1593 struct urb *urb;
1365baf7
ON		 1594 int rv = 0;
1595
bbf0cb3e 1596 spin_lock_irq(&acm->write_lock);
11ea859d 1597
e144ed28
JH		 1598 if (--acm->susp_count)
1599 goto out;
1365baf7 1600
7fb57a01 1601 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1602 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1603
140cb81a
JH		 1604 for (;;) {
1605 urb = usb_get_from_anchor(&acm->delayed);
1606 if (!urb)
1607 break;
1608
1609 acm_start_wb(acm, urb->context);
97d35f95
ON		 1610 }
1611
1612 /*
1613 * delayed error checking because we must
1614 * do the write path at all cost
1615 */
1365baf7 1616 if (rv < 0)
e144ed28 1617 goto out;
1365baf7 1618
e144ed28 1619 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1620 }
e144ed28 1621out:
bbf0cb3e 1622 spin_unlock_irq(&acm->write_lock);
1365baf7 1623
1365baf7
ON		 1624 return rv;
1625}
35758589 1626
a91b0c50
FL		 1627static int acm_reset_resume(struct usb_interface *intf)
1628{
1629 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1630
aa27a094
JS		 1631 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1632 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1633
a91b0c50
FL		 1634 return acm_resume(intf);
1635}
1636
35758589 1637#endif /* CONFIG_PM */
c1479a92
AT		 1638
1639#define NOKIA_PCSUITE_ACM_INFO(x) \
1640 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1641 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1642 USB_CDC_ACM_PROTO_VENDOR)
1643
4035e456
TG		 1644#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1645 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1646 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1647 USB_CDC_ACM_PROTO_VENDOR)
1648
1da177e4
LT		 1649/*
1650 * USB driver structure.
1651 */
1652
6ef4852b 1653static const struct usb_device_id acm_ids[] = {
1da177e4 1654 /* quirky and broken devices */
3b59d16c
DC		 1655 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1656 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1657 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1659 },
b0e2a705
AA		 1660 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1662 },
0f9c7b4a
AL		 1663 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1665 },
8753e65e
MO		 1666 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
91a9c921
CM		 1669 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1671 },
7abcf20b
AC		 1672 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1673 .driver_info = SINGLE_RX_URB,
1674 },
86478944
ON		 1675 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1676 .driver_info = SINGLE_RX_URB, /* firmware bug */
1677 },
3dd2ae81
ON		 1678 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1679 .driver_info = SINGLE_RX_URB, /* firmware bug */
1680 },
9be8456c
ON		 1681 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1683 },
6149ed5e
IM		 1684 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1685 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1686 },
c8fd2c37
ES		 1687 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1688 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1689 },
c89c60e9
AC		 1690 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1692 },
cab98a0a
XK		 1693 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1695 },
2a8cdfde
JH		 1696 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1697 .driver_info = QUIRK_CONTROL_LINE_STATE, },
cf84a691 1698 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
155df65a
DT		 1699 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1700 },
6abff5dc
KH		 1701 /* Motorola H24 HSPA module: */
1702 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1703 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1704 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1705 },
1706 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1707 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1708 },
1709 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1710 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1711 },
1712 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1713 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1714 },
1715 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1716 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1717 },
1718 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1720 },
1721 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1723 },
6abff5dc 1724
c332b4e1
AR		 1725 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1726 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1727 data interface instead of
1728 communications interface.
1729 Maybe we should define a new
1730 quirk for this. */
1731 },
e7d491a1
JCR		 1732 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1733 .driver_info = NO_UNION_NORMAL,
1734 },
036915a7
DL		 1735 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1736 .driver_info = NO_UNION_NORMAL,
1737 },
1f17c502
KK		 1738 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1739 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1740 },
c3baa19b
RN		 1741 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1742 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1743 },
9be8456c 1744
c1479a92
AT		 1745 /* Nokia S60 phones expose two ACM channels. The first is
1746 * a modem and is picked up by the standard AT-command
1747 * information below. The second is 'vendor-specific' but
1748 * is treated as a serial device at the S60 end, so we want
1749 * to expose it on Linux too. */
1750 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1751 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1752 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1753 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1754 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1755 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1756 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1757 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1762 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1764 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1765 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1766 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1768 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1770 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1771 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1773 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1774 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1781 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1782 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1783 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1786 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1787 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1791 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1792 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1793 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1794 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1797 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1801 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1802 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1804 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1805 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1807 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1808
65e52f41
DP		 1809 /* Support for Owen devices */
1810 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1811
c1479a92
AT		 1812 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1813
fd5054c1
ES		 1814 /* Support for Droids MuIn LCD */
1815 { USB_DEVICE(0x04d8, 0x000b),
1816 .driver_info = NO_DATA_INTERFACE,
1817 },
1818
16142655
DT		 1819#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1820 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1821 .driver_info = IGNORE_DEVICE,
1822 },
1823 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1824 .driver_info = IGNORE_DEVICE,
1825 },
1826#endif
1827
5b239f0a
PC		 1828 /* control interfaces without any protocol set */
1829 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1830 USB_CDC_PROTO_NONE) },
1831
1da177e4
LT		 1832 /* control interfaces with various AT-command sets */
1833 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1834 USB_CDC_ACM_PROTO_AT_V25TER) },
1835 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1836 USB_CDC_ACM_PROTO_AT_PCCA101) },
1837 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1838 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1839 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1840 USB_CDC_ACM_PROTO_AT_GSM) },
1841 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1842 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1843 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1844 USB_CDC_ACM_PROTO_AT_CDMA) },
1845
1da177e4
LT		 1846 { }
1847};
1848
6e47e069 1849MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1850
1851static struct usb_driver acm_driver = {
1da177e4
LT		 1852 .name = "cdc_acm",
1853 .probe = acm_probe,
1854 .disconnect = acm_disconnect,
35758589 1855#ifdef CONFIG_PM
1365baf7
ON		 1856 .suspend = acm_suspend,
1857 .resume = acm_resume,
a91b0c50 1858 .reset_resume = acm_reset_resume,
35758589 1859#endif
1da177e4 1860 .id_table = acm_ids,
35758589 1861#ifdef CONFIG_PM
1365baf7 1862 .supports_autosuspend = 1,
35758589 1863#endif
e1f12eb6 1864 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1865};
1866
1867/*
1868 * TTY driver structures.
1869 */
1870
b68e31d0 1871static const struct tty_operations acm_ops = {
7fb57a01 1872 .install = acm_tty_install,
1da177e4
LT		 1873 .open = acm_tty_open,
1874 .close = acm_tty_close,
7fb57a01 1875 .cleanup = acm_tty_cleanup,
10077d4a 1876 .hangup = acm_tty_hangup,
1da177e4
LT		 1877 .write = acm_tty_write,
1878 .write_room = acm_tty_write_room,
1879 .ioctl = acm_tty_ioctl,
1880 .throttle = acm_tty_throttle,
1881 .unthrottle = acm_tty_unthrottle,
1882 .chars_in_buffer = acm_tty_chars_in_buffer,
1883 .break_ctl = acm_tty_break_ctl,
1884 .set_termios = acm_tty_set_termios,
1885 .tiocmget = acm_tty_tiocmget,
1886 .tiocmset = acm_tty_tiocmset,
1887};
1888
1889/*
1890 * Init / exit.
1891 */
1892
1893static int __init acm_init(void)
1894{
1895 int retval;
1896 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1897 if (!acm_tty_driver)
1898 return -ENOMEM;
1da177e4
LT		 1899 acm_tty_driver->driver_name = "acm",
1900 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1901 acm_tty_driver->major = ACM_TTY_MAJOR,
1902 acm_tty_driver->minor_start = 0,
1903 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1904 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1905 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1906 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1907 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1908 HUPCL | CLOCAL;
1da177e4
LT		 1909 tty_set_operations(acm_tty_driver, &acm_ops);
1910
1911 retval = tty_register_driver(acm_tty_driver);
1912 if (retval) {
1913 put_tty_driver(acm_tty_driver);
1914 return retval;
1915 }
1916
1917 retval = usb_register(&acm_driver);
1918 if (retval) {
1919 tty_unregister_driver(acm_tty_driver);
1920 put_tty_driver(acm_tty_driver);
1921 return retval;
1922 }
1923
a2c7b935 1924 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1925
1926 return 0;
1927}
1928
1929static void __exit acm_exit(void)
1930{
1931 usb_deregister(&acm_driver);
1932 tty_unregister_driver(acm_tty_driver);
1933 put_tty_driver(acm_tty_driver);
1934}
1935
1936module_init(acm_init);
1937module_exit(acm_exit);
1938
6e47e069
AC		 1939MODULE_AUTHOR(DRIVER_AUTHOR);
1940MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1941MODULE_LICENSE("GPL");
e766aeb8 1942MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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