projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: cdc-acm: fix potential urb leak and PM imbalance in write
[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
7fb57a01
HS		 63/*
64 * acm_table accessors
65 */
1da177e4 66
7fb57a01
HS		 67/*
68 * Look up an ACM structure by index. If found and not disconnected, increment
69 * its refcount and return it with its mutex held.
70 */
71static struct acm *acm_get_by_index(unsigned index)
72{
73 struct acm *acm;
74
75 mutex_lock(&acm_table_lock);
76 acm = acm_table[index];
77 if (acm) {
78 mutex_lock(&acm->mutex);
79 if (acm->disconnected) {
80 mutex_unlock(&acm->mutex);
81 acm = NULL;
82 } else {
83 tty_port_get(&acm->port);
84 mutex_unlock(&acm->mutex);
85 }
86 }
87 mutex_unlock(&acm_table_lock);
88 return acm;
89}
90
91/*
92 * Try to find an available minor number and if found, associate it with 'acm'.
93 */
94static int acm_alloc_minor(struct acm *acm)
95{
96 int minor;
97
98 mutex_lock(&acm_table_lock);
99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
100 if (!acm_table[minor]) {
101 acm_table[minor] = acm;
102 break;
103 }
104 }
105 mutex_unlock(&acm_table_lock);
106
107 return minor;
108}
109
110/* Release the minor number associated with 'acm'. */
111static void acm_release_minor(struct acm *acm)
112{
113 mutex_lock(&acm_table_lock);
114 acm_table[acm->minor] = NULL;
115 mutex_unlock(&acm_table_lock);
116}
739e0285 117
1da177e4
LT		 118/*
119 * Functions for ACM control messages.
120 */
121
6e47e069
AC		 122static int acm_ctrl_msg(struct acm *acm, int request, int value,
123 void *buf, int len)
1da177e4 124{
bae3f4c5
JH		 125 int retval;
126
127 retval = usb_autopm_get_interface(acm->control);
128 if (retval)
129 return retval;
130
131 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
1da177e4
LT		 132 request, USB_RT_ACM, value,
133 acm->control->altsetting[0].desc.bInterfaceNumber,
134 buf, len, 5000);
bae3f4c5 135
a5cc7ef9
JH		 136 dev_dbg(&acm->control->dev,
137 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
138 __func__, request, value, len, retval);
bae3f4c5
JH		 139
140 usb_autopm_put_interface(acm->control);
141
1da177e4
LT		 142 return retval < 0 ? retval : 0;
143}
144
145/* devices aren't required to support these requests.
146 * the cdc acm descriptor tells whether they do...
147 */
148#define acm_set_control(acm, control) \
149 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
150#define acm_set_line(acm, line) \
151 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
152#define acm_send_break(acm, ms) \
153 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
154
884b600f
ON		 155/*
156 * Write buffer management.
157 * All of these assume proper locks taken by the caller.
158 */
159
160static int acm_wb_alloc(struct acm *acm)
161{
162 int i, wbn;
163 struct acm_wb *wb;
164
e4cf3aa8 165 wbn = 0;
884b600f
ON		 166 i = 0;
167 for (;;) {
168 wb = &acm->wb[wbn];
169 if (!wb->use) {
170 wb->use = 1;
171 return wbn;
172 }
86478944
ON		 173 wbn = (wbn + 1) % ACM_NW;
174 if (++i >= ACM_NW)
884b600f
ON		 175 return -1;
176 }
177}
178
884b600f
ON		 179static int acm_wb_is_avail(struct acm *acm)
180{
181 int i, n;
e5fbab51 182 unsigned long flags;
884b600f 183
86478944 184 n = ACM_NW;
e5fbab51 185 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 186 for (i = 0; i < ACM_NW; i++)
86478944 187 n -= acm->wb[i].use;
e5fbab51 188 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 189 return n;
190}
191
884b600f 192/*
ad0b65ef 193 * Finish write. Caller must hold acm->write_lock
884b600f 194 */
e4cf3aa8 195static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 196{
e4cf3aa8 197 wb->use = 0;
11ea859d 198 acm->transmitting--;
97d35f95 199 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 200}
201
202/*
203 * Poke write.
11ea859d
ON		 204 *
205 * the caller is responsible for locking
884b600f 206 */
11ea859d
ON		 207
208static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
209{
210 int rc;
211
212 acm->transmitting++;
213
214 wb->urb->transfer_buffer = wb->buf;
215 wb->urb->transfer_dma = wb->dmah;
216 wb->urb->transfer_buffer_length = wb->len;
217 wb->urb->dev = acm->dev;
218
6e47e069
AC		 219 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
220 if (rc < 0) {
a5cc7ef9
JH		 221 dev_err(&acm->data->dev,
222 "%s - usb_submit_urb(write bulk) failed: %d\n",
223 __func__, rc);
11ea859d
ON		 224 acm_write_done(acm, wb);
225 }
226 return rc;
227}
228
c4cabd28
ON		 229/*
230 * attributes exported through sysfs
231 */
232static ssize_t show_caps
233(struct device *dev, struct device_attribute *attr, char *buf)
234{
235 struct usb_interface *intf = to_usb_interface(dev);
236 struct acm *acm = usb_get_intfdata(intf);
237
238 return sprintf(buf, "%d", acm->ctrl_caps);
239}
240static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
241
242static ssize_t show_country_codes
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 memcpy(buf, acm->country_codes, acm->country_code_size);
249 return acm->country_code_size;
250}
251
252static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
253
254static ssize_t show_country_rel_date
255(struct device *dev, struct device_attribute *attr, char *buf)
256{
257 struct usb_interface *intf = to_usb_interface(dev);
258 struct acm *acm = usb_get_intfdata(intf);
259
260 return sprintf(buf, "%d", acm->country_rel_date);
261}
884b600f 262
c4cabd28 263static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 264/*
265 * Interrupt handlers for various ACM device responses
266 */
267
268/* control interface reports status changes with "interrupt" transfers */
7d12e780 269static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 270{
271 struct acm *acm = urb->context;
272 struct usb_cdc_notification *dr = urb->transfer_buffer;
273 unsigned char *data;
274 int newctrl;
5a6a62bd 275 int difference;
185d4058
GKH		 276 int retval;
277 int status = urb->status;
1da177e4 278
185d4058 279 switch (status) {
1da177e4
LT		 280 case 0:
281 /* success */
282 break;
283 case -ECONNRESET:
284 case -ENOENT:
285 case -ESHUTDOWN:
286 /* this urb is terminated, clean up */
a5cc7ef9
JH		 287 dev_dbg(&acm->control->dev,
288 "%s - urb shutting down with status: %d\n",
289 __func__, status);
1da177e4
LT		 290 return;
291 default:
a5cc7ef9
JH		 292 dev_dbg(&acm->control->dev,
293 "%s - nonzero urb status received: %d\n",
294 __func__, status);
1da177e4
LT		 295 goto exit;
296 }
297
7e7797e7
JH		 298 usb_mark_last_busy(acm->dev);
299
1da177e4
LT		 300 data = (unsigned char *)(dr + 1);
301 switch (dr->bNotificationType) {
6e47e069 302 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
a5cc7ef9
JH		 303 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
304 __func__, dr->wValue);
6e47e069 305 break;
1da177e4 306
6e47e069 307 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 308 newctrl = get_unaligned_le16(data);
1da177e4 309
aa27a094
JS		 310 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
311 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
312 __func__);
313 tty_port_tty_hangup(&acm->port, false);
6e47e069 314 }
1da177e4 315
5a6a62bd
ON		 316 difference = acm->ctrlin ^ newctrl;
317 spin_lock(&acm->read_lock);
6e47e069 318 acm->ctrlin = newctrl;
5a6a62bd
ON		 319 acm->oldcount = acm->iocount;
320
321 if (difference & ACM_CTRL_DSR)
322 acm->iocount.dsr++;
323 if (difference & ACM_CTRL_BRK)
324 acm->iocount.brk++;
325 if (difference & ACM_CTRL_RI)
326 acm->iocount.rng++;
327 if (difference & ACM_CTRL_DCD)
328 acm->iocount.dcd++;
329 if (difference & ACM_CTRL_FRAMING)
330 acm->iocount.frame++;
331 if (difference & ACM_CTRL_PARITY)
332 acm->iocount.parity++;
333 if (difference & ACM_CTRL_OVERRUN)
334 acm->iocount.overrun++;
335 spin_unlock(&acm->read_lock);
336
337 if (difference)
338 wake_up_all(&acm->wioctl);
1da177e4 339
5a6a62bd 340 break;
1da177e4 341
6e47e069 342 default:
a5cc7ef9
JH		 343 dev_dbg(&acm->control->dev,
344 "%s - unknown notification %d received: index %d "
345 "len %d data0 %d data1 %d\n",
346 __func__,
6e47e069
AC		 347 dr->bNotificationType, dr->wIndex,
348 dr->wLength, data[0], data[1]);
349 break;
1da177e4
LT		 350 }
351exit:
6e47e069 352 retval = usb_submit_urb(urb, GFP_ATOMIC);
185d4058 353 if (retval)
1d9846e5
JH		 354 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
355 __func__, retval);
1da177e4
LT		 356}
357
088c64f8 358static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 359{
088c64f8 360 int res;
185d4058 361
088c64f8
JH		 362 if (!test_and_clear_bit(index, &acm->read_urbs_free))
363 return 0;
1da177e4 364
088c64f8
JH		 365 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
366
367 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
368 if (res) {
369 if (res != -EPERM) {
370 dev_err(&acm->data->dev,
371 "%s - usb_submit_urb failed: %d\n",
372 __func__, res);
373 }
374 set_bit(index, &acm->read_urbs_free);
375 return res;
11ea859d 376 }
1da177e4 377
088c64f8
JH		 378 return 0;
379}
1da177e4 380
088c64f8
JH		 381static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
382{
383 int res;
384 int i;
61a87adf 385
088c64f8
JH		 386 for (i = 0; i < acm->rx_buflimit; ++i) {
387 res = acm_submit_read_urb(acm, i, mem_flags);
388 if (res)
389 return res;
86478944 390 }
088c64f8
JH		 391
392 return 0;
1da177e4
LT		 393}
394
088c64f8 395static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 396{
088c64f8 397 if (!urb->actual_length)
ca79b7b4 398 return;
61a87adf 399
05c7cd39
JS		 400 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
401 urb->actual_length);
2e124b4a 402 tty_flip_buffer_push(&acm->port);
088c64f8 403}
10077d4a 404
088c64f8
JH		 405static void acm_read_bulk_callback(struct urb *urb)
406{
407 struct acm_rb *rb = urb->context;
408 struct acm *acm = rb->instance;
409 unsigned long flags;
61a87adf 410
088c64f8
JH		 411 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
412 rb->index, urb->actual_length);
413 set_bit(rb->index, &acm->read_urbs_free);
61a87adf 414
088c64f8
JH		 415 if (!acm->dev) {
416 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
417 return;
418 }
419 usb_mark_last_busy(acm->dev);
61a87adf 420
088c64f8
JH		 421 if (urb->status) {
422 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
423 __func__, urb->status);
424 return;
61a87adf 425 }
088c64f8
JH		 426 acm_process_read_urb(acm, urb);
427
428 /* throttle device if requested by tty */
11ea859d 429 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8
JH		 430 acm->throttled = acm->throttle_req;
431 if (!acm->throttled && !acm->susp_count) {
432 spin_unlock_irqrestore(&acm->read_lock, flags);
433 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
434 } else {
435 spin_unlock_irqrestore(&acm->read_lock, flags);
436 }
1da177e4
LT		 437}
438
439/* data interface wrote those outgoing bytes */
7d12e780 440static void acm_write_bulk(struct urb *urb)
1da177e4 441{
cdc97792 442 struct acm_wb *wb = urb->context;
e5fbab51 443 struct acm *acm = wb->instance;
ad0b65ef 444 unsigned long flags;
1da177e4 445
4fa4626c
JH		 446 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
447 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
1d9846e5 448 __func__,
e5fbab51
DB		 449 urb->actual_length,
450 urb->transfer_buffer_length,
451 urb->status);
1da177e4 452
ad0b65ef 453 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 454 acm_write_done(acm, wb);
ad0b65ef 455 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 456 schedule_work(&acm->work);
1da177e4
LT		 457}
458
c4028958 459static void acm_softint(struct work_struct *work)
1da177e4 460{
c4028958 461 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 462
1d9846e5
JH		 463 dev_vdbg(&acm->data->dev, "%s\n", __func__);
464
6aad04f2 465 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 466}
467
468/*
469 * TTY handlers
470 */
471
7fb57a01 472static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 473{
474 struct acm *acm;
7fb57a01 475 int retval;
1da177e4 476
7fb57a01 477 dev_dbg(tty->dev, "%s\n", __func__);
1da177e4 478
7fb57a01
HS		 479 acm = acm_get_by_index(tty->index);
480 if (!acm)
481 return -ENODEV;
a5cc7ef9 482
f8a8c10f 483 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 484 if (retval)
485 goto error_init_termios;
10077d4a 486
1da177e4 487 tty->driver_data = acm;
1da177e4 488
7fb57a01
HS		 489 return 0;
490
491error_init_termios:
492 tty_port_put(&acm->port);
493 return retval;
494}
495
496static int acm_tty_open(struct tty_struct *tty, struct file *filp)
497{
498 struct acm *acm = tty->driver_data;
499
500 dev_dbg(tty->dev, "%s\n", __func__);
501
502 return tty_port_open(&acm->port, tty, filp);
503}
504
505static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
506{
507 struct acm *acm = container_of(port, struct acm, port);
508 int retval = -ENODEV;
509
510 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 511
512 mutex_lock(&acm->mutex);
7fb57a01
HS		 513 if (acm->disconnected)
514 goto disconnected;
515
516 retval = usb_autopm_get_interface(acm->control);
517 if (retval)
518 goto error_get_interface;
519
520 /*
521 * FIXME: Why do we need this? Allocating 64K of physically contiguous
522 * memory is really nasty...
523 */
524 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
525 acm->control->needs_remote_wakeup = 1;
1365baf7 526
1da177e4
LT		 527 acm->ctrlurb->dev = acm->dev;
528 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
a5cc7ef9
JH		 529 dev_err(&acm->control->dev,
530 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
070c0b17 531 usb_autopm_put_interface(acm->control);
7fb57a01 532 goto error_submit_urb;
1da177e4
LT		 533 }
534
7fb57a01
HS		 535 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
536 if (acm_set_control(acm, acm->ctrlout) < 0 &&
070c0b17
AK		 537 (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
538 usb_autopm_put_interface(acm->control);
7fb57a01 539 goto error_set_control;
070c0b17 540 }
10077d4a 541
11ea859d 542 usb_autopm_put_interface(acm->control);
1da177e4 543
6c4707f3
OM		 544 /*
545 * Unthrottle device in case the TTY was closed while throttled.
546 */
547 spin_lock_irq(&acm->read_lock);
548 acm->throttled = 0;
549 acm->throttle_req = 0;
550 spin_unlock_irq(&acm->read_lock);
551
088c64f8 552 if (acm_submit_read_urbs(acm, GFP_KERNEL))
7fb57a01 553 goto error_submit_read_urbs;
2b626dc1 554
1365baf7 555 mutex_unlock(&acm->mutex);
1da177e4 556
7fb57a01
HS		 557 return 0;
558
559error_submit_read_urbs:
560 acm->ctrlout = 0;
561 acm_set_control(acm, acm->ctrlout);
562error_set_control:
563 usb_kill_urb(acm->ctrlurb);
564error_submit_urb:
7fb57a01
HS		 565error_get_interface:
566disconnected:
567 mutex_unlock(&acm->mutex);
568 return retval;
1da177e4
LT		 569}
570
7fb57a01 571static void acm_port_destruct(struct tty_port *port)
83ef344a 572{
7fb57a01
HS		 573 struct acm *acm = container_of(port, struct acm, port);
574
575 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 576
7fb57a01 577 acm_release_minor(acm);
83ef344a 578 usb_put_intf(acm->control);
c4cabd28 579 kfree(acm->country_codes);
83ef344a 580 kfree(acm);
581}
582
7fb57a01 583static void acm_port_shutdown(struct tty_port *port)
10077d4a 584{
7fb57a01 585 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 586 struct urb *urb;
587 struct acm_wb *wb;
dab54c9f
JH		 588 int i;
589
7fb57a01
HS		 590 dev_dbg(&acm->control->dev, "%s\n", __func__);
591
592 mutex_lock(&acm->mutex);
593 if (!acm->disconnected) {
10077d4a
AC		 594 usb_autopm_get_interface(acm->control);
595 acm_set_control(acm, acm->ctrlout = 0);
140cb81a
JH		 596
597 for (;;) {
598 urb = usb_get_from_anchor(&acm->delayed);
599 if (!urb)
600 break;
601 wb = urb->context;
602 wb->use = 0;
603 usb_autopm_put_interface_async(acm->control);
604 }
605
10077d4a
AC		 606 usb_kill_urb(acm->ctrlurb);
607 for (i = 0; i < ACM_NW; i++)
608 usb_kill_urb(acm->wb[i].urb);
dab54c9f 609 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 610 usb_kill_urb(acm->read_urbs[i]);
10077d4a
AC		 611 acm->control->needs_remote_wakeup = 0;
612 usb_autopm_put_interface(acm->control);
613 }
7fb57a01
HS		 614 mutex_unlock(&acm->mutex);
615}
616
617static void acm_tty_cleanup(struct tty_struct *tty)
618{
619 struct acm *acm = tty->driver_data;
620 dev_dbg(&acm->control->dev, "%s\n", __func__);
621 tty_port_put(&acm->port);
10077d4a
AC		 622}
623
624static void acm_tty_hangup(struct tty_struct *tty)
625{
626 struct acm *acm = tty->driver_data;
7fb57a01 627 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 628 tty_port_hangup(&acm->port);
10077d4a
AC		 629}
630
1da177e4
LT		 631static void acm_tty_close(struct tty_struct *tty, struct file *filp)
632{
633 struct acm *acm = tty->driver_data;
7fb57a01
HS		 634 dev_dbg(&acm->control->dev, "%s\n", __func__);
635 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 636}
637
6e47e069
AC		 638static int acm_tty_write(struct tty_struct *tty,
639 const unsigned char *buf, int count)
1da177e4
LT		 640{
641 struct acm *acm = tty->driver_data;
642 int stat;
884b600f
ON		 643 unsigned long flags;
644 int wbn;
645 struct acm_wb *wb;
646
1da177e4
LT		 647 if (!count)
648 return 0;
649
5e9e75f8 650 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 651
884b600f 652 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 653 wbn = acm_wb_alloc(acm);
654 if (wbn < 0) {
884b600f 655 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 656 return 0;
657 }
658 wb = &acm->wb[wbn];
1da177e4 659
71c2fb03
GKH		 660 if (!acm->dev) {
661 wb->use = 0;
662 spin_unlock_irqrestore(&acm->write_lock, flags);
663 return -ENODEV;
664 }
665
884b600f 666 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 667 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 668 memcpy(wb->buf, buf, count);
669 wb->len = count;
71c2fb03 670
183a4508
JH		 671 stat = usb_autopm_get_interface_async(acm->control);
672 if (stat) {
673 wb->use = 0;
674 spin_unlock_irqrestore(&acm->write_lock, flags);
675 return stat;
676 }
677
71c2fb03 678 if (acm->susp_count) {
140cb81a 679 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 680 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 681 return count;
71c2fb03
GKH		 682 }
683 usb_mark_last_busy(acm->dev);
684
685 stat = acm_start_wb(acm, wb);
884b600f 686 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 687
6e47e069 688 if (stat < 0)
1da177e4 689 return stat;
1da177e4
LT		 690 return count;
691}
692
693static int acm_tty_write_room(struct tty_struct *tty)
694{
695 struct acm *acm = tty->driver_data;
884b600f
ON		 696 /*
697 * Do not let the line discipline to know that we have a reserve,
698 * or it might get too enthusiastic.
699 */
934da463 700 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 701}
702
703static int acm_tty_chars_in_buffer(struct tty_struct *tty)
704{
705 struct acm *acm = tty->driver_data;
7fb57a01
HS		 706 /*
707 * if the device was unplugged then any remaining characters fell out
708 * of the connector ;)
709 */
710 if (acm->disconnected)
23198fda 711 return 0;
884b600f
ON		 712 /*
713 * This is inaccurate (overcounts), but it works.
714 */
86478944 715 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 716}
717
718static void acm_tty_throttle(struct tty_struct *tty)
719{
720 struct acm *acm = tty->driver_data;
088c64f8 721
088c64f8
JH		 722 spin_lock_irq(&acm->read_lock);
723 acm->throttle_req = 1;
724 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 725}
726
727static void acm_tty_unthrottle(struct tty_struct *tty)
728{
729 struct acm *acm = tty->driver_data;
088c64f8
JH		 730 unsigned int was_throttled;
731
088c64f8
JH		 732 spin_lock_irq(&acm->read_lock);
733 was_throttled = acm->throttled;
734 acm->throttled = 0;
735 acm->throttle_req = 0;
736 spin_unlock_irq(&acm->read_lock);
737
738 if (was_throttled)
739 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 740}
741
9e98966c 742static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 743{
744 struct acm *acm = tty->driver_data;
9e98966c 745 int retval;
7fb57a01 746
9e98966c
AC		 747 retval = acm_send_break(acm, state ? 0xffff : 0);
748 if (retval < 0)
a5cc7ef9
JH		 749 dev_dbg(&acm->control->dev, "%s - send break failed\n",
750 __func__);
9e98966c 751 return retval;
1da177e4
LT		 752}
753
60b33c13 754static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 755{
756 struct acm *acm = tty->driver_data;
757
1da177e4
LT		 758 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
759 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
760 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
761 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
762 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
763 TIOCM_CTS;
764}
765
20b9d177 766static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 767 unsigned int set, unsigned int clear)
768{
769 struct acm *acm = tty->driver_data;
770 unsigned int newctrl;
771
1da177e4 772 newctrl = acm->ctrlout;
6e47e069
AC		 773 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
774 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
775 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
776 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 777
778 newctrl = (newctrl & ~clear) | set;
779
780 if (acm->ctrlout == newctrl)
781 return 0;
782 return acm_set_control(acm, acm->ctrlout = newctrl);
783}
784
18c75720
ON		 785static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
786{
787 struct serial_struct tmp;
788
789 if (!info)
790 return -EINVAL;
791
792 memset(&tmp, 0, sizeof(tmp));
793 tmp.flags = ASYNC_LOW_LATENCY;
794 tmp.xmit_fifo_size = acm->writesize;
795 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 796 tmp.close_delay = acm->port.close_delay / 10;
797 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
798 ASYNC_CLOSING_WAIT_NONE :
799 acm->port.closing_wait / 10;
18c75720
ON		 800
801 if (copy_to_user(info, &tmp, sizeof(tmp)))
802 return -EFAULT;
803 else
804 return 0;
805}
806
ba2d8ce9
DW		 807static int set_serial_info(struct acm *acm,
808 struct serial_struct __user *newinfo)
809{
810 struct serial_struct new_serial;
811 unsigned int closing_wait, close_delay;
812 int retval = 0;
813
814 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
815 return -EFAULT;
816
817 close_delay = new_serial.close_delay * 10;
818 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
819 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
820
821 mutex_lock(&acm->port.mutex);
822
823 if (!capable(CAP_SYS_ADMIN)) {
824 if ((close_delay != acm->port.close_delay) ||
825 (closing_wait != acm->port.closing_wait))
826 retval = -EPERM;
827 else
828 retval = -EOPNOTSUPP;
829 } else {
830 acm->port.close_delay = close_delay;
831 acm->port.closing_wait = closing_wait;
832 }
833
834 mutex_unlock(&acm->port.mutex);
835 return retval;
836}
837
5a6a62bd
ON		 838static int wait_serial_change(struct acm *acm, unsigned long arg)
839{
840 int rv = 0;
841 DECLARE_WAITQUEUE(wait, current);
842 struct async_icount old, new;
843
844 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
845 return -EINVAL;
846 do {
847 spin_lock_irq(&acm->read_lock);
848 old = acm->oldcount;
849 new = acm->iocount;
850 acm->oldcount = new;
851 spin_unlock_irq(&acm->read_lock);
852
853 if ((arg & TIOCM_DSR) &&
854 old.dsr != new.dsr)
855 break;
856 if ((arg & TIOCM_CD) &&
857 old.dcd != new.dcd)
858 break;
859 if ((arg & TIOCM_RI) &&
860 old.rng != new.rng)
861 break;
862
863 add_wait_queue(&acm->wioctl, &wait);
864 set_current_state(TASK_INTERRUPTIBLE);
865 schedule();
866 remove_wait_queue(&acm->wioctl, &wait);
867 if (acm->disconnected) {
868 if (arg & TIOCM_CD)
869 break;
870 else
871 rv = -ENODEV;
872 } else {
873 if (signal_pending(current))
874 rv = -ERESTARTSYS;
875 }
876 } while (!rv);
877
878
879
880 return rv;
881}
882
797ef137
ON		 883static int get_serial_usage(struct acm *acm,
884 struct serial_icounter_struct __user *count)
885{
886 struct serial_icounter_struct icount;
887 int rv = 0;
888
889 memset(&icount, 0, sizeof(icount));
890 icount.dsr = acm->iocount.dsr;
891 icount.rng = acm->iocount.rng;
892 icount.dcd = acm->iocount.dcd;
893 icount.frame = acm->iocount.frame;
894 icount.overrun = acm->iocount.overrun;
895 icount.parity = acm->iocount.parity;
896 icount.brk = acm->iocount.brk;
897
898 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
899 rv = -EFAULT;
900
901 return rv;
902}
903
6caa76b7 904static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 905 unsigned int cmd, unsigned long arg)
1da177e4 906{
18c75720
ON		 907 struct acm *acm = tty->driver_data;
908 int rv = -ENOIOCTLCMD;
909
910 switch (cmd) {
911 case TIOCGSERIAL: /* gets serial port data */
912 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 913 break;
914 case TIOCSSERIAL:
915 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 916 break;
5a6a62bd 917 case TIOCMIWAIT:
8fdbeb26
ON		 918 rv = usb_autopm_get_interface(acm->control);
919 if (rv < 0) {
920 rv = -EIO;
921 break;
922 }
5a6a62bd 923 rv = wait_serial_change(acm, arg);
8fdbeb26 924 usb_autopm_put_interface(acm->control);
5a6a62bd 925 break;
797ef137
ON		 926 case TIOCGICOUNT:
927 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
928 break;
18c75720
ON		 929 }
930
931 return rv;
1da177e4
LT		 932}
933
6e47e069
AC		 934static void acm_tty_set_termios(struct tty_struct *tty,
935 struct ktermios *termios_old)
1da177e4
LT		 936{
937 struct acm *acm = tty->driver_data;
adc8d746 938 struct ktermios *termios = &tty->termios;
1da177e4
LT		 939 struct usb_cdc_line_coding newline;
940 int newctrl = acm->ctrlout;
941
9b80fee1 942 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 943 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
944 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 945 (termios->c_cflag & PARODD ? 1 : 2) +
946 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 947 switch (termios->c_cflag & CSIZE) {
948 case CS5:
949 newline.bDataBits = 5;
950 break;
951 case CS6:
952 newline.bDataBits = 6;
953 break;
954 case CS7:
955 newline.bDataBits = 7;
956 break;
957 case CS8:
958 default:
959 newline.bDataBits = 8;
960 break;
961 }
6e47e069 962 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 963 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
964
965 if (!newline.dwDTERate) {
966 newline.dwDTERate = acm->line.dwDTERate;
967 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 968 } else
969 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 970
971 if (newctrl != acm->ctrlout)
972 acm_set_control(acm, acm->ctrlout = newctrl);
973
974 if (memcmp(&acm->line, &newline, sizeof newline)) {
975 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 976 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
977 __func__,
978 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 979 newline.bCharFormat, newline.bParityType,
980 newline.bDataBits);
981 acm_set_line(acm, &acm->line);
982 }
983}
984
7fb57a01
HS		 985static const struct tty_port_operations acm_port_ops = {
986 .shutdown = acm_port_shutdown,
987 .activate = acm_port_activate,
988 .destruct = acm_port_destruct,
989};
990
1da177e4
LT		 991/*
992 * USB probe and disconnect routines.
993 */
994
830f4021 995/* Little helpers: write/read buffers free */
884b600f
ON		 996static void acm_write_buffers_free(struct acm *acm)
997{
998 int i;
999 struct acm_wb *wb;
a496c64f 1000 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1001
6e47e069 1002 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1003 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1004}
1005
830f4021
ON		 1006static void acm_read_buffers_free(struct acm *acm)
1007{
1008 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1009 int i;
830f4021 1010
dab54c9f 1011 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1012 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1013 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1014}
1015
884b600f
ON		 1016/* Little helper: write buffers allocate */
1017static int acm_write_buffers_alloc(struct acm *acm)
1018{
1019 int i;
1020 struct acm_wb *wb;
1021
86478944 1022 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1023 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1024 &wb->dmah);
1025 if (!wb->buf) {
1026 while (i != 0) {
1027 --i;
1028 --wb;
997ea58e 1029 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1030 wb->buf, wb->dmah);
1031 }
1032 return -ENOMEM;
1033 }
1034 }
1035 return 0;
1036}
1037
10077d4a
AC		 1038static int acm_probe(struct usb_interface *intf,
1039 const struct usb_device_id *id)
1da177e4
LT		 1040{
1041 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1042 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1043 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1044 int buflen = intf->altsetting->extralen;
1045 struct usb_interface *control_interface;
1046 struct usb_interface *data_interface;
a2bfb4a3
ON		 1047 struct usb_endpoint_descriptor *epctrl = NULL;
1048 struct usb_endpoint_descriptor *epread = NULL;
1049 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1050 struct usb_device *usb_dev = interface_to_usbdev(intf);
1051 struct acm *acm;
1052 int minor;
6e47e069 1053 int ctrlsize, readsize;
1da177e4
LT		 1054 u8 *buf;
1055 u8 ac_management_function = 0;
1056 u8 call_management_function = 0;
1057 int call_interface_num = -1;
fd5054c1 1058 int data_interface_num = -1;
1da177e4 1059 unsigned long quirks;
86478944 1060 int num_rx_buf;
61a87adf 1061 int i;
a2bfb4a3 1062 int combined_interfaces = 0;
c93d8195
AK		 1063 struct device *tty_dev;
1064 int rv = -ENOMEM;
1da177e4 1065
86478944 1066 /* normal quirks */
1da177e4 1067 quirks = (unsigned long)id->driver_info;
16142655
DT		 1068
1069 if (quirks == IGNORE_DEVICE)
1070 return -ENODEV;
1071
86478944
ON		 1072 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1073
1074 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1075 if (quirks == NO_UNION_NORMAL) {
1076 data_interface = usb_ifnum_to_if(usb_dev, 1);
1077 control_interface = usb_ifnum_to_if(usb_dev, 0);
1078 goto skip_normal_probe;
1079 }
6e47e069 1080
1da177e4
LT		 1081 /* normal probing*/
1082 if (!buffer) {
9908a32e 1083 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1084 return -EINVAL;
1085 }
1086
1087 if (!buflen) {
577045c0
TG		 1088 if (intf->cur_altsetting->endpoint &&
1089 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1090 intf->cur_altsetting->endpoint->extra) {
1091 dev_dbg(&intf->dev,
1092 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1093 buflen = intf->cur_altsetting->endpoint->extralen;
1094 buffer = intf->cur_altsetting->endpoint->extra;
1095 } else {
9908a32e
GKH		 1096 dev_err(&intf->dev,
1097 "Zero length descriptor references\n");
1da177e4
LT		 1098 return -EINVAL;
1099 }
1100 }
1101
1102 while (buflen > 0) {
6e47e069 1103 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1104 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1105 goto next_desc;
1106 }
1107
6e47e069
AC		 1108 switch (buffer[2]) {
1109 case USB_CDC_UNION_TYPE: /* we've found it */
1110 if (union_header) {
1111 dev_err(&intf->dev, "More than one "
1112 "union descriptor, skipping ...\n");
1113 goto next_desc;
1da177e4 1114 }
6e47e069
AC		 1115 union_header = (struct usb_cdc_union_desc *)buffer;
1116 break;
1117 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1118 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1119 break;
1120 case USB_CDC_HEADER_TYPE: /* maybe check version */
1121 break; /* for now we ignore it */
1122 case USB_CDC_ACM_TYPE:
1123 ac_management_function = buffer[3];
1124 break;
1125 case USB_CDC_CALL_MANAGEMENT_TYPE:
1126 call_management_function = buffer[3];
1127 call_interface_num = buffer[4];
02f824ac 1128 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1129 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1130 break;
1131 default:
1132 /* there are LOTS more CDC descriptors that
1133 * could legitimately be found here.
1134 */
1135 dev_dbg(&intf->dev, "Ignoring descriptor: "
1136 "type %02x, length %d\n",
1137 buffer[2], buffer[0]);
1138 break;
1139 }
1da177e4
LT		 1140next_desc:
1141 buflen -= buffer[0];
1142 buffer += buffer[0];
1143 }
1144
1145 if (!union_header) {
1146 if (call_interface_num > 0) {
6e47e069 1147 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1148 /* quirks for Droids MuIn LCD */
1149 if (quirks & NO_DATA_INTERFACE)
1150 data_interface = usb_ifnum_to_if(usb_dev, 0);
1151 else
1152 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1153 control_interface = intf;
1154 } else {
a2bfb4a3
ON		 1155 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1156 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1157 return -ENODEV;
1158 } else {
1159 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1160 combined_interfaces = 1;
1161 control_interface = data_interface = intf;
1162 goto look_for_collapsed_interface;
1163 }
1da177e4
LT		 1164 }
1165 } else {
1166 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1167 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1168 if (!control_interface || !data_interface) {
6e47e069 1169 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1170 return -ENODEV;
1171 }
1172 }
6e47e069 1173
1da177e4 1174 if (data_interface_num != call_interface_num)
6e47e069 1175 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1176
a2bfb4a3
ON		 1177 if (control_interface == data_interface) {
1178 /* some broken devices designed for windows work this way */
1179 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1180 combined_interfaces = 1;
1181 /* a popular other OS doesn't use it */
1182 quirks |= NO_CAP_LINE;
1183 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1184 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1185 return -EINVAL;
1186 }
1187look_for_collapsed_interface:
1188 for (i = 0; i < 3; i++) {
1189 struct usb_endpoint_descriptor *ep;
1190 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1191
1192 if (usb_endpoint_is_int_in(ep))
1193 epctrl = ep;
1194 else if (usb_endpoint_is_bulk_out(ep))
1195 epwrite = ep;
1196 else if (usb_endpoint_is_bulk_in(ep))
1197 epread = ep;
1198 else
1199 return -EINVAL;
1200 }
1201 if (!epctrl || !epread || !epwrite)
1202 return -ENODEV;
1203 else
1204 goto made_compressed_probe;
1205 }
1206
1da177e4
LT		 1207skip_normal_probe:
1208
1209 /*workaround for switched interfaces */
6e47e069
AC		 1210 if (data_interface->cur_altsetting->desc.bInterfaceClass
1211 != CDC_DATA_INTERFACE_TYPE) {
1212 if (control_interface->cur_altsetting->desc.bInterfaceClass
1213 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1214 struct usb_interface *t;
6e47e069
AC		 1215 dev_dbg(&intf->dev,
1216 "Your device has switched interfaces.\n");
1da177e4
LT		 1217 t = control_interface;
1218 control_interface = data_interface;
1219 data_interface = t;
1220 } else {
1221 return -EINVAL;
1222 }
1223 }
74da5d68
AS		 1224
1225 /* Accept probe requests only for the control interface */
a2bfb4a3 1226 if (!combined_interfaces && intf != control_interface)
74da5d68 1227 return -ENODEV;
6e47e069 1228
a2bfb4a3
ON		 1229 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1230 /* valid in this context */
6e47e069 1231 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1232 return -EBUSY;
1233 }
1234
1235
99f347ca
SS		 1236 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1237 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1238 return -EINVAL;
1239
1240 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1241 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1242 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1243
1244
1245 /* workaround for switched endpoints */
45aea704 1246 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1247 /* descriptors are swapped */
1248 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1249 dev_dbg(&intf->dev,
1250 "The data interface has switched endpoints\n");
1da177e4
LT		 1251 t = epread;
1252 epread = epwrite;
1253 epwrite = t;
1254 }
a2bfb4a3 1255made_compressed_probe:
a5cc7ef9 1256 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1257
6e47e069
AC		 1258 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1259 if (acm == NULL) {
255ab56c 1260 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1261 goto alloc_fail;
1262 }
1da177e4 1263
7fb57a01
HS		 1264 minor = acm_alloc_minor(acm);
1265 if (minor == ACM_TTY_MINORS) {
1266 dev_err(&intf->dev, "no more free acm devices\n");
1267 kfree(acm);
1268 return -ENODEV;
1269 }
1270
29cc8897
KM		 1271 ctrlsize = usb_endpoint_maxp(epctrl);
1272 readsize = usb_endpoint_maxp(epread) *
6e47e069 1273 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1274 acm->combined_interfaces = combined_interfaces;
29cc8897 1275 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1276 acm->control = control_interface;
1277 acm->data = data_interface;
1278 acm->minor = minor;
1279 acm->dev = usb_dev;
1280 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1281 if (quirks & NO_CAP_LINE)
1282 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1283 acm->ctrlsize = ctrlsize;
1284 acm->readsize = readsize;
86478944 1285 acm->rx_buflimit = num_rx_buf;
c4028958 1286 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1287 init_waitqueue_head(&acm->wioctl);
884b600f 1288 spin_lock_init(&acm->write_lock);
61a87adf 1289 spin_lock_init(&acm->read_lock);
1365baf7 1290 mutex_init(&acm->mutex);
61a87adf 1291 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1292 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1293 if (acm->is_int_ep)
1294 acm->bInterval = epread->bInterval;
739e0285
AC		 1295 tty_port_init(&acm->port);
1296 acm->port.ops = &acm_port_ops;
140cb81a 1297 init_usb_anchor(&acm->delayed);
1da177e4 1298
997ea58e 1299 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1300 if (!buf) {
255ab56c 1301 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1302 goto alloc_fail2;
1303 }
1304 acm->ctrl_buffer = buf;
1305
884b600f 1306 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1307 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1308 goto alloc_fail4;
1309 }
1da177e4
LT		 1310
1311 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1312 if (!acm->ctrlurb) {
255ab56c 1313 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1314 goto alloc_fail5;
1315 }
86478944 1316 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1317 struct acm_rb *rb = &(acm->read_buffers[i]);
1318 struct urb *urb;
61a87adf 1319
74f5e1ba
JH		 1320 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1321 &rb->dma);
1322 if (!rb->base) {
1323 dev_err(&intf->dev, "out of memory "
1324 "(read bufs usb_alloc_coherent)\n");
1325 goto alloc_fail6;
1326 }
088c64f8
JH		 1327 rb->index = i;
1328 rb->instance = acm;
74f5e1ba 1329
088c64f8
JH		 1330 urb = usb_alloc_urb(0, GFP_KERNEL);
1331 if (!urb) {
255ab56c 1332 dev_err(&intf->dev,
6e47e069 1333 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1334 goto alloc_fail6;
61a87adf 1335 }
088c64f8
JH		 1336 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1337 urb->transfer_dma = rb->dma;
1338 if (acm->is_int_ep) {
1339 usb_fill_int_urb(urb, acm->dev,
1340 acm->rx_endpoint,
1341 rb->base,
1342 acm->readsize,
1343 acm_read_bulk_callback, rb,
1344 acm->bInterval);
1345 } else {
1346 usb_fill_bulk_urb(urb, acm->dev,
1347 acm->rx_endpoint,
1348 rb->base,
1349 acm->readsize,
1350 acm_read_bulk_callback, rb);
1351 }
61a87adf 1352
088c64f8
JH		 1353 acm->read_urbs[i] = urb;
1354 __set_bit(i, &acm->read_urbs_free);
61a87adf 1355 }
6e47e069 1356 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1357 struct acm_wb *snd = &(acm->wb[i]);
1358
6e47e069
AC		 1359 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1360 if (snd->urb == NULL) {
255ab56c 1361 dev_err(&intf->dev,
59d7fec7 1362 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1363 goto alloc_fail7;
e4cf3aa8
DE		 1364 }
1365
5186ffee
AL		 1366 if (usb_endpoint_xfer_int(epwrite))
1367 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1368 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1369 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1370 else
1371 usb_fill_bulk_urb(snd->urb, usb_dev,
1372 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1373 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1374 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1375 snd->instance = acm;
1da177e4
LT		 1376 }
1377
6e47e069 1378 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1379
1380 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1381 if (i < 0)
74f5e1ba 1382 goto alloc_fail7;
c4cabd28
ON		 1383
1384 if (cfd) { /* export the country data */
1385 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1386 if (!acm->country_codes)
1387 goto skip_countries;
1388 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1389 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1390 cfd->bLength - 4);
c4cabd28
ON		 1391 acm->country_rel_date = cfd->iCountryCodeRelDate;
1392
1393 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1394 if (i < 0) {
1395 kfree(acm->country_codes);
e7c8e860
JL		 1396 acm->country_codes = NULL;
1397 acm->country_code_size = 0;
c4cabd28
ON		 1398 goto skip_countries;
1399 }
1400
6e47e069
AC		 1401 i = device_create_file(&intf->dev,
1402 &dev_attr_iCountryCodeRelDate);
c4cabd28 1403 if (i < 0) {
c2572b78 1404 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1405 kfree(acm->country_codes);
e7c8e860
JL		 1406 acm->country_codes = NULL;
1407 acm->country_code_size = 0;
c4cabd28
ON		 1408 goto skip_countries;
1409 }
1410 }
1411
1412skip_countries:
6e47e069 1413 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1414 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1415 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1416 /* works around buggy devices */
d102e78f 1417 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1418 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1419 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1420
1da177e4
LT		 1421 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1422
1423 acm_set_control(acm, acm->ctrlout);
1424
1425 acm->line.dwDTERate = cpu_to_le32(9600);
1426 acm->line.bDataBits = 8;
1427 acm_set_line(acm, &acm->line);
1428
1429 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1430 usb_set_intfdata(data_interface, acm);
1da177e4 1431
83ef344a 1432 usb_get_intf(control_interface);
c93d8195 1433 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1434 &control_interface->dev);
c93d8195
AK		 1435 if (IS_ERR(tty_dev)) {
1436 rv = PTR_ERR(tty_dev);
1437 goto alloc_fail8;
1438 }
1da177e4 1439
c4cabd28 1440 return 0;
c93d8195
AK		 1441alloc_fail8:
1442 if (acm->country_codes) {
1443 device_remove_file(&acm->control->dev,
1444 &dev_attr_wCountryCodes);
1445 device_remove_file(&acm->control->dev,
1446 &dev_attr_iCountryCodeRelDate);
1447 }
1448 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1449alloc_fail7:
c93d8195 1450 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1451 for (i = 0; i < ACM_NW; i++)
1452 usb_free_urb(acm->wb[i].urb);
c2572b78 1453alloc_fail6:
86478944 1454 for (i = 0; i < num_rx_buf; i++)
088c64f8 1455 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1456 acm_read_buffers_free(acm);
1da177e4
LT		 1457 usb_free_urb(acm->ctrlurb);
1458alloc_fail5:
884b600f 1459 acm_write_buffers_free(acm);
1da177e4 1460alloc_fail4:
997ea58e 1461 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1462alloc_fail2:
7fb57a01 1463 acm_release_minor(acm);
1da177e4
LT		 1464 kfree(acm);
1465alloc_fail:
c93d8195 1466 return rv;
1da177e4
LT		 1467}
1468
1365baf7
ON		 1469static void stop_data_traffic(struct acm *acm)
1470{
1471 int i;
a5cc7ef9
JH		 1472
1473 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1474
1365baf7 1475 usb_kill_urb(acm->ctrlurb);
6e47e069 1476 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1477 usb_kill_urb(acm->wb[i].urb);
1365baf7 1478 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1479 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1480
1481 cancel_work_sync(&acm->work);
1482}
1483
1da177e4
LT		 1484static void acm_disconnect(struct usb_interface *intf)
1485{
c4cabd28 1486 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1487 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1488 struct tty_struct *tty;
7fb57a01
HS		 1489 int i;
1490
1491 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1492
672c4e18
DB		 1493 /* sibling interface is already cleaning up */
1494 if (!acm)
86067eea 1495 return;
672c4e18 1496
7fb57a01
HS		 1497 mutex_lock(&acm->mutex);
1498 acm->disconnected = true;
6e47e069 1499 if (acm->country_codes) {
74da5d68
AS		 1500 device_remove_file(&acm->control->dev,
1501 &dev_attr_wCountryCodes);
1502 device_remove_file(&acm->control->dev,
1503 &dev_attr_iCountryCodeRelDate);
c4cabd28 1504 }
5a6a62bd 1505 wake_up_all(&acm->wioctl);
74da5d68 1506 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1507 usb_set_intfdata(acm->control, NULL);
1508 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1509 mutex_unlock(&acm->mutex);
1510
1511 tty = tty_port_tty_get(&acm->port);
1512 if (tty) {
1513 tty_vhangup(tty);
1514 tty_kref_put(tty);
1515 }
1da177e4 1516
1365baf7 1517 stop_data_traffic(acm);
1da177e4 1518
cb25505f
JH		 1519 tty_unregister_device(acm_tty_driver, acm->minor);
1520
7fb57a01
HS		 1521 usb_free_urb(acm->ctrlurb);
1522 for (i = 0; i < ACM_NW; i++)
1523 usb_free_urb(acm->wb[i].urb);
1524 for (i = 0; i < acm->rx_buflimit; i++)
1525 usb_free_urb(acm->read_urbs[i]);
884b600f 1526 acm_write_buffers_free(acm);
7fb57a01 1527 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1528 acm_read_buffers_free(acm);
1da177e4 1529
a2bfb4a3
ON		 1530 if (!acm->combined_interfaces)
1531 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1532 acm->data : acm->control);
1da177e4 1533
7fb57a01 1534 tty_port_put(&acm->port);
1da177e4
LT		 1535}
1536
35758589 1537#ifdef CONFIG_PM
1365baf7
ON		 1538static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1539{
1540 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1541 int cnt;
1542
5a345c20
JH		 1543 spin_lock_irq(&acm->read_lock);
1544 spin_lock(&acm->write_lock);
5b1b0b81 1545 if (PMSG_IS_AUTO(message)) {
5a345c20
JH		 1546 if (acm->transmitting) {
1547 spin_unlock(&acm->write_lock);
1548 spin_unlock_irq(&acm->read_lock);
11ea859d 1549 return -EBUSY;
5a345c20 1550 }
11ea859d 1551 }
11ea859d
ON		 1552 cnt = acm->susp_count++;
1553 spin_unlock(&acm->write_lock);
1554 spin_unlock_irq(&acm->read_lock);
1365baf7 1555
11ea859d 1556 if (cnt)
1365baf7 1557 return 0;
1365baf7 1558
ed797074 1559 stop_data_traffic(acm);
1365baf7 1560
1365baf7
ON		 1561 return 0;
1562}
1563
1564static int acm_resume(struct usb_interface *intf)
1565{
1566 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1567 struct urb *urb;
1365baf7
ON		 1568 int rv = 0;
1569
11ea859d 1570 spin_lock_irq(&acm->read_lock);
e144ed28 1571 spin_lock(&acm->write_lock);
11ea859d 1572
e144ed28
JH		 1573 if (--acm->susp_count)
1574 goto out;
1365baf7 1575
7fb57a01 1576 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1577 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1578
140cb81a
JH		 1579 for (;;) {
1580 urb = usb_get_from_anchor(&acm->delayed);
1581 if (!urb)
1582 break;
1583
1584 acm_start_wb(acm, urb->context);
97d35f95
ON		 1585 }
1586
1587 /*
1588 * delayed error checking because we must
1589 * do the write path at all cost
1590 */
1365baf7 1591 if (rv < 0)
e144ed28 1592 goto out;
1365baf7 1593
e144ed28 1594 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1595 }
e144ed28
JH		 1596out:
1597 spin_unlock(&acm->write_lock);
1598 spin_unlock_irq(&acm->read_lock);
1365baf7 1599
1365baf7
ON		 1600 return rv;
1601}
35758589 1602
a91b0c50
FL		 1603static int acm_reset_resume(struct usb_interface *intf)
1604{
1605 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1606
aa27a094
JS		 1607 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1608 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1609
a91b0c50
FL		 1610 return acm_resume(intf);
1611}
1612
35758589 1613#endif /* CONFIG_PM */
c1479a92
AT		 1614
1615#define NOKIA_PCSUITE_ACM_INFO(x) \
1616 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1617 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1618 USB_CDC_ACM_PROTO_VENDOR)
1619
4035e456
TG		 1620#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1621 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1622 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1623 USB_CDC_ACM_PROTO_VENDOR)
1624
1da177e4
LT		 1625/*
1626 * USB driver structure.
1627 */
1628
6ef4852b 1629static const struct usb_device_id acm_ids[] = {
1da177e4 1630 /* quirky and broken devices */
3b59d16c
DC		 1631 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1632 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1633 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1634 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1635 },
b0e2a705
AA		 1636 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1637 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1638 },
0f9c7b4a
AL		 1639 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1640 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1641 },
8753e65e
MO		 1642 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1643 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1644 },
91a9c921
CM		 1645 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1646 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1647 },
7abcf20b
AC		 1648 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1649 .driver_info = SINGLE_RX_URB,
1650 },
86478944
ON		 1651 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1652 .driver_info = SINGLE_RX_URB, /* firmware bug */
1653 },
3dd2ae81
ON		 1654 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1655 .driver_info = SINGLE_RX_URB, /* firmware bug */
1656 },
9be8456c
ON		 1657 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1659 },
6149ed5e
IM		 1660 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1662 },
c8fd2c37
ES		 1663 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1665 },
c89c60e9
AC		 1666 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
cab98a0a
XK		 1669 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1671 },
155df65a
DT		 1672 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1673 },
6abff5dc
KH		 1674 /* Motorola H24 HSPA module: */
1675 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1676 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1677 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1678 },
1679 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1680 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1681 },
1682 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1683 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1684 },
1685 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1686 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1687 },
1688 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1689 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1690 },
1691 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1692 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1693 },
1694 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1695 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1696 },
6abff5dc 1697
c332b4e1
AR		 1698 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1699 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1700 data interface instead of
1701 communications interface.
1702 Maybe we should define a new
1703 quirk for this. */
1704 },
e7d491a1
JCR		 1705 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1706 .driver_info = NO_UNION_NORMAL,
1707 },
036915a7
DL		 1708 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1709 .driver_info = NO_UNION_NORMAL,
1710 },
1f17c502
KK		 1711 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1712 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1713 },
c3baa19b
RN		 1714 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1715 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1716 },
9be8456c 1717
c1479a92
AT		 1718 /* Nokia S60 phones expose two ACM channels. The first is
1719 * a modem and is picked up by the standard AT-command
1720 * information below. The second is 'vendor-specific' but
1721 * is treated as a serial device at the S60 end, so we want
1722 * to expose it on Linux too. */
1723 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1724 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1725 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1727 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1728 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1737 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1738 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1739 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1740 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1741 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1743 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1744 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1746 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1747 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1750 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1751 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1752 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1753 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1754 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1755 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1756 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1757 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1759 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1762 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1764 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1765 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1766 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1767 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1768 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1769 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1770 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1773 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1774 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1775 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1777 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1778 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1780 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1781
65e52f41
DP		 1782 /* Support for Owen devices */
1783 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1784
c1479a92
AT		 1785 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1786
7c5d8c39 1787 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1788 { USB_DEVICE(0x0694, 0xff00),
1789 .driver_info = NOT_A_MODEM,
7893afc0 1790 },
7c5d8c39 1791
fd5054c1
ES		 1792 /* Support for Droids MuIn LCD */
1793 { USB_DEVICE(0x04d8, 0x000b),
1794 .driver_info = NO_DATA_INTERFACE,
1795 },
1796
16142655
DT		 1797#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1798 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1799 .driver_info = IGNORE_DEVICE,
1800 },
1801 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1802 .driver_info = IGNORE_DEVICE,
1803 },
1804#endif
1805
5b239f0a
PC		 1806 /* control interfaces without any protocol set */
1807 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1808 USB_CDC_PROTO_NONE) },
1809
1da177e4
LT		 1810 /* control interfaces with various AT-command sets */
1811 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1812 USB_CDC_ACM_PROTO_AT_V25TER) },
1813 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1814 USB_CDC_ACM_PROTO_AT_PCCA101) },
1815 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1816 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1817 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1818 USB_CDC_ACM_PROTO_AT_GSM) },
1819 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1820 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1821 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1822 USB_CDC_ACM_PROTO_AT_CDMA) },
1823
1da177e4
LT		 1824 { }
1825};
1826
6e47e069 1827MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1828
1829static struct usb_driver acm_driver = {
1da177e4
LT		 1830 .name = "cdc_acm",
1831 .probe = acm_probe,
1832 .disconnect = acm_disconnect,
35758589 1833#ifdef CONFIG_PM
1365baf7
ON		 1834 .suspend = acm_suspend,
1835 .resume = acm_resume,
a91b0c50 1836 .reset_resume = acm_reset_resume,
35758589 1837#endif
1da177e4 1838 .id_table = acm_ids,
35758589 1839#ifdef CONFIG_PM
1365baf7 1840 .supports_autosuspend = 1,
35758589 1841#endif
e1f12eb6 1842 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1843};
1844
1845/*
1846 * TTY driver structures.
1847 */
1848
b68e31d0 1849static const struct tty_operations acm_ops = {
7fb57a01 1850 .install = acm_tty_install,
1da177e4
LT		 1851 .open = acm_tty_open,
1852 .close = acm_tty_close,
7fb57a01 1853 .cleanup = acm_tty_cleanup,
10077d4a 1854 .hangup = acm_tty_hangup,
1da177e4
LT		 1855 .write = acm_tty_write,
1856 .write_room = acm_tty_write_room,
1857 .ioctl = acm_tty_ioctl,
1858 .throttle = acm_tty_throttle,
1859 .unthrottle = acm_tty_unthrottle,
1860 .chars_in_buffer = acm_tty_chars_in_buffer,
1861 .break_ctl = acm_tty_break_ctl,
1862 .set_termios = acm_tty_set_termios,
1863 .tiocmget = acm_tty_tiocmget,
1864 .tiocmset = acm_tty_tiocmset,
1865};
1866
1867/*
1868 * Init / exit.
1869 */
1870
1871static int __init acm_init(void)
1872{
1873 int retval;
1874 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1875 if (!acm_tty_driver)
1876 return -ENOMEM;
1da177e4
LT		 1877 acm_tty_driver->driver_name = "acm",
1878 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1879 acm_tty_driver->major = ACM_TTY_MAJOR,
1880 acm_tty_driver->minor_start = 0,
1881 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1882 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1883 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1884 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1885 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1886 HUPCL | CLOCAL;
1da177e4
LT		 1887 tty_set_operations(acm_tty_driver, &acm_ops);
1888
1889 retval = tty_register_driver(acm_tty_driver);
1890 if (retval) {
1891 put_tty_driver(acm_tty_driver);
1892 return retval;
1893 }
1894
1895 retval = usb_register(&acm_driver);
1896 if (retval) {
1897 tty_unregister_driver(acm_tty_driver);
1898 put_tty_driver(acm_tty_driver);
1899 return retval;
1900 }
1901
a2c7b935 1902 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1903
1904 return 0;
1905}
1906
1907static void __exit acm_exit(void)
1908{
1909 usb_deregister(&acm_driver);
1910 tty_unregister_driver(acm_tty_driver);
1911 put_tty_driver(acm_tty_driver);
1912}
1913
1914module_init(acm_init);
1915module_exit(acm_exit);
1916
6e47e069
AC		 1917MODULE_AUTHOR(DRIVER_AUTHOR);
1918MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1919MODULE_LICENSE("GPL");
e766aeb8 1920MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
This page took 1.096089 seconds and 5 git commands to generate.