projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: cdc-acm: minimise no-suspend window during shutdown
[linux-2.6-block.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 430 acm->throttled = acm->throttle_req;
bbf0cb3e 431 if (!acm->throttled) {
088c64f8
JH		 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;
e4c36076 509 int i;
7fb57a01
HS		 510
511 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 512
513 mutex_lock(&acm->mutex);
7fb57a01
HS		 514 if (acm->disconnected)
515 goto disconnected;
516
517 retval = usb_autopm_get_interface(acm->control);
518 if (retval)
519 goto error_get_interface;
520
521 /*
522 * FIXME: Why do we need this? Allocating 64K of physically contiguous
523 * memory is really nasty...
524 */
525 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
526 acm->control->needs_remote_wakeup = 1;
1365baf7 527
1da177e4 528 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 529 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
530 if (retval) {
a5cc7ef9
JH		 531 dev_err(&acm->control->dev,
532 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 533 goto error_submit_urb;
1da177e4
LT		 534 }
535
7fb57a01 536 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
8727bf68
JH		 537 retval = acm_set_control(acm, acm->ctrlout);
538 if (retval < 0 && (acm->ctrl_caps & USB_CDC_CAP_LINE))
7fb57a01 539 goto error_set_control;
10077d4a 540
6c4707f3
OM		 541 /*
542 * Unthrottle device in case the TTY was closed while throttled.
543 */
544 spin_lock_irq(&acm->read_lock);
545 acm->throttled = 0;
546 acm->throttle_req = 0;
547 spin_unlock_irq(&acm->read_lock);
548
8727bf68
JH		 549 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
550 if (retval)
7fb57a01 551 goto error_submit_read_urbs;
2b626dc1 552
703df329
JH		 553 usb_autopm_put_interface(acm->control);
554
1365baf7 555 mutex_unlock(&acm->mutex);
1da177e4 556
7fb57a01
HS		 557 return 0;
558
559error_submit_read_urbs:
e4c36076
JH		 560 for (i = 0; i < acm->rx_buflimit; i++)
561 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 562 acm->ctrlout = 0;
563 acm_set_control(acm, acm->ctrlout);
564error_set_control:
565 usb_kill_urb(acm->ctrlurb);
566error_submit_urb:
703df329 567 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 568error_get_interface:
569disconnected:
570 mutex_unlock(&acm->mutex);
8727bf68
JH		 571
572 return usb_translate_errors(retval);
1da177e4
LT		 573}
574
7fb57a01 575static void acm_port_destruct(struct tty_port *port)
83ef344a 576{
7fb57a01
HS		 577 struct acm *acm = container_of(port, struct acm, port);
578
579 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 580
7fb57a01 581 acm_release_minor(acm);
83ef344a 582 usb_put_intf(acm->control);
c4cabd28 583 kfree(acm->country_codes);
83ef344a 584 kfree(acm);
585}
586
7fb57a01 587static void acm_port_shutdown(struct tty_port *port)
10077d4a 588{
7fb57a01 589 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 590 struct urb *urb;
591 struct acm_wb *wb;
dab54c9f
JH		 592 int i;
593
7fb57a01
HS		 594 dev_dbg(&acm->control->dev, "%s\n", __func__);
595
89e54e44 596 acm_set_control(acm, acm->ctrlout = 0);
140cb81a 597
b1d42efc
JH		 598 /*
599 * Need to grab write_lock to prevent race with resume, but no need to
600 * hold it due to the tty-port initialised flag.
601 */
602 spin_lock_irq(&acm->write_lock);
603 spin_unlock_irq(&acm->write_lock);
604
605 usb_autopm_get_interface_no_resume(acm->control);
606 acm->control->needs_remote_wakeup = 0;
607 usb_autopm_put_interface(acm->control);
608
89e54e44
JH		 609 for (;;) {
610 urb = usb_get_from_anchor(&acm->delayed);
611 if (!urb)
612 break;
613 wb = urb->context;
614 wb->use = 0;
615 usb_autopm_put_interface_async(acm->control);
10077d4a 616 }
89e54e44
JH		 617
618 usb_kill_urb(acm->ctrlurb);
619 for (i = 0; i < ACM_NW; i++)
620 usb_kill_urb(acm->wb[i].urb);
621 for (i = 0; i < acm->rx_buflimit; i++)
622 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 623}
624
625static void acm_tty_cleanup(struct tty_struct *tty)
626{
627 struct acm *acm = tty->driver_data;
628 dev_dbg(&acm->control->dev, "%s\n", __func__);
629 tty_port_put(&acm->port);
10077d4a
AC		 630}
631
632static void acm_tty_hangup(struct tty_struct *tty)
633{
634 struct acm *acm = tty->driver_data;
7fb57a01 635 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 636 tty_port_hangup(&acm->port);
10077d4a
AC		 637}
638
1da177e4
LT		 639static void acm_tty_close(struct tty_struct *tty, struct file *filp)
640{
641 struct acm *acm = tty->driver_data;
7fb57a01
HS		 642 dev_dbg(&acm->control->dev, "%s\n", __func__);
643 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 644}
645
6e47e069
AC		 646static int acm_tty_write(struct tty_struct *tty,
647 const unsigned char *buf, int count)
1da177e4
LT		 648{
649 struct acm *acm = tty->driver_data;
650 int stat;
884b600f
ON		 651 unsigned long flags;
652 int wbn;
653 struct acm_wb *wb;
654
1da177e4
LT		 655 if (!count)
656 return 0;
657
5e9e75f8 658 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 659
884b600f 660 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 661 wbn = acm_wb_alloc(acm);
662 if (wbn < 0) {
884b600f 663 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 664 return 0;
665 }
666 wb = &acm->wb[wbn];
1da177e4 667
71c2fb03
GKH		 668 if (!acm->dev) {
669 wb->use = 0;
670 spin_unlock_irqrestore(&acm->write_lock, flags);
671 return -ENODEV;
672 }
673
884b600f 674 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 675 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 676 memcpy(wb->buf, buf, count);
677 wb->len = count;
71c2fb03 678
183a4508
JH		 679 stat = usb_autopm_get_interface_async(acm->control);
680 if (stat) {
681 wb->use = 0;
682 spin_unlock_irqrestore(&acm->write_lock, flags);
683 return stat;
684 }
685
71c2fb03 686 if (acm->susp_count) {
140cb81a 687 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 688 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 689 return count;
71c2fb03
GKH		 690 }
691 usb_mark_last_busy(acm->dev);
692
693 stat = acm_start_wb(acm, wb);
884b600f 694 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 695
6e47e069 696 if (stat < 0)
1da177e4 697 return stat;
1da177e4
LT		 698 return count;
699}
700
701static int acm_tty_write_room(struct tty_struct *tty)
702{
703 struct acm *acm = tty->driver_data;
884b600f
ON		 704 /*
705 * Do not let the line discipline to know that we have a reserve,
706 * or it might get too enthusiastic.
707 */
934da463 708 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 709}
710
711static int acm_tty_chars_in_buffer(struct tty_struct *tty)
712{
713 struct acm *acm = tty->driver_data;
7fb57a01
HS		 714 /*
715 * if the device was unplugged then any remaining characters fell out
716 * of the connector ;)
717 */
718 if (acm->disconnected)
23198fda 719 return 0;
884b600f
ON		 720 /*
721 * This is inaccurate (overcounts), but it works.
722 */
86478944 723 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 724}
725
726static void acm_tty_throttle(struct tty_struct *tty)
727{
728 struct acm *acm = tty->driver_data;
088c64f8 729
088c64f8
JH		 730 spin_lock_irq(&acm->read_lock);
731 acm->throttle_req = 1;
732 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 733}
734
735static void acm_tty_unthrottle(struct tty_struct *tty)
736{
737 struct acm *acm = tty->driver_data;
088c64f8
JH		 738 unsigned int was_throttled;
739
088c64f8
JH		 740 spin_lock_irq(&acm->read_lock);
741 was_throttled = acm->throttled;
742 acm->throttled = 0;
743 acm->throttle_req = 0;
744 spin_unlock_irq(&acm->read_lock);
745
746 if (was_throttled)
747 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 748}
749
9e98966c 750static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 751{
752 struct acm *acm = tty->driver_data;
9e98966c 753 int retval;
7fb57a01 754
9e98966c
AC		 755 retval = acm_send_break(acm, state ? 0xffff : 0);
756 if (retval < 0)
a5cc7ef9
JH		 757 dev_dbg(&acm->control->dev, "%s - send break failed\n",
758 __func__);
9e98966c 759 return retval;
1da177e4
LT		 760}
761
60b33c13 762static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 763{
764 struct acm *acm = tty->driver_data;
765
1da177e4
LT		 766 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
767 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
768 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
769 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
770 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
771 TIOCM_CTS;
772}
773
20b9d177 774static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 775 unsigned int set, unsigned int clear)
776{
777 struct acm *acm = tty->driver_data;
778 unsigned int newctrl;
779
1da177e4 780 newctrl = acm->ctrlout;
6e47e069
AC		 781 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
782 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
783 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
784 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 785
786 newctrl = (newctrl & ~clear) | set;
787
788 if (acm->ctrlout == newctrl)
789 return 0;
790 return acm_set_control(acm, acm->ctrlout = newctrl);
791}
792
18c75720
ON		 793static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
794{
795 struct serial_struct tmp;
796
797 if (!info)
798 return -EINVAL;
799
800 memset(&tmp, 0, sizeof(tmp));
801 tmp.flags = ASYNC_LOW_LATENCY;
802 tmp.xmit_fifo_size = acm->writesize;
803 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 804 tmp.close_delay = acm->port.close_delay / 10;
805 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
806 ASYNC_CLOSING_WAIT_NONE :
807 acm->port.closing_wait / 10;
18c75720
ON		 808
809 if (copy_to_user(info, &tmp, sizeof(tmp)))
810 return -EFAULT;
811 else
812 return 0;
813}
814
ba2d8ce9
DW		 815static int set_serial_info(struct acm *acm,
816 struct serial_struct __user *newinfo)
817{
818 struct serial_struct new_serial;
819 unsigned int closing_wait, close_delay;
820 int retval = 0;
821
822 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
823 return -EFAULT;
824
825 close_delay = new_serial.close_delay * 10;
826 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
827 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
828
829 mutex_lock(&acm->port.mutex);
830
831 if (!capable(CAP_SYS_ADMIN)) {
832 if ((close_delay != acm->port.close_delay) ||
833 (closing_wait != acm->port.closing_wait))
834 retval = -EPERM;
835 else
836 retval = -EOPNOTSUPP;
837 } else {
838 acm->port.close_delay = close_delay;
839 acm->port.closing_wait = closing_wait;
840 }
841
842 mutex_unlock(&acm->port.mutex);
843 return retval;
844}
845
5a6a62bd
ON		 846static int wait_serial_change(struct acm *acm, unsigned long arg)
847{
848 int rv = 0;
849 DECLARE_WAITQUEUE(wait, current);
850 struct async_icount old, new;
851
852 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
853 return -EINVAL;
854 do {
855 spin_lock_irq(&acm->read_lock);
856 old = acm->oldcount;
857 new = acm->iocount;
858 acm->oldcount = new;
859 spin_unlock_irq(&acm->read_lock);
860
861 if ((arg & TIOCM_DSR) &&
862 old.dsr != new.dsr)
863 break;
864 if ((arg & TIOCM_CD) &&
865 old.dcd != new.dcd)
866 break;
867 if ((arg & TIOCM_RI) &&
868 old.rng != new.rng)
869 break;
870
871 add_wait_queue(&acm->wioctl, &wait);
872 set_current_state(TASK_INTERRUPTIBLE);
873 schedule();
874 remove_wait_queue(&acm->wioctl, &wait);
875 if (acm->disconnected) {
876 if (arg & TIOCM_CD)
877 break;
878 else
879 rv = -ENODEV;
880 } else {
881 if (signal_pending(current))
882 rv = -ERESTARTSYS;
883 }
884 } while (!rv);
885
886
887
888 return rv;
889}
890
797ef137
ON		 891static int get_serial_usage(struct acm *acm,
892 struct serial_icounter_struct __user *count)
893{
894 struct serial_icounter_struct icount;
895 int rv = 0;
896
897 memset(&icount, 0, sizeof(icount));
898 icount.dsr = acm->iocount.dsr;
899 icount.rng = acm->iocount.rng;
900 icount.dcd = acm->iocount.dcd;
901 icount.frame = acm->iocount.frame;
902 icount.overrun = acm->iocount.overrun;
903 icount.parity = acm->iocount.parity;
904 icount.brk = acm->iocount.brk;
905
906 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
907 rv = -EFAULT;
908
909 return rv;
910}
911
6caa76b7 912static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 913 unsigned int cmd, unsigned long arg)
1da177e4 914{
18c75720
ON		 915 struct acm *acm = tty->driver_data;
916 int rv = -ENOIOCTLCMD;
917
918 switch (cmd) {
919 case TIOCGSERIAL: /* gets serial port data */
920 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 921 break;
922 case TIOCSSERIAL:
923 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 924 break;
5a6a62bd 925 case TIOCMIWAIT:
8fdbeb26
ON		 926 rv = usb_autopm_get_interface(acm->control);
927 if (rv < 0) {
928 rv = -EIO;
929 break;
930 }
5a6a62bd 931 rv = wait_serial_change(acm, arg);
8fdbeb26 932 usb_autopm_put_interface(acm->control);
5a6a62bd 933 break;
797ef137
ON		 934 case TIOCGICOUNT:
935 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
936 break;
18c75720
ON		 937 }
938
939 return rv;
1da177e4
LT		 940}
941
6e47e069
AC		 942static void acm_tty_set_termios(struct tty_struct *tty,
943 struct ktermios *termios_old)
1da177e4
LT		 944{
945 struct acm *acm = tty->driver_data;
adc8d746 946 struct ktermios *termios = &tty->termios;
1da177e4
LT		 947 struct usb_cdc_line_coding newline;
948 int newctrl = acm->ctrlout;
949
9b80fee1 950 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 951 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
952 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 953 (termios->c_cflag & PARODD ? 1 : 2) +
954 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 955 switch (termios->c_cflag & CSIZE) {
956 case CS5:
957 newline.bDataBits = 5;
958 break;
959 case CS6:
960 newline.bDataBits = 6;
961 break;
962 case CS7:
963 newline.bDataBits = 7;
964 break;
965 case CS8:
966 default:
967 newline.bDataBits = 8;
968 break;
969 }
6e47e069 970 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 971 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
972
973 if (!newline.dwDTERate) {
974 newline.dwDTERate = acm->line.dwDTERate;
975 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 976 } else
977 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 978
979 if (newctrl != acm->ctrlout)
980 acm_set_control(acm, acm->ctrlout = newctrl);
981
982 if (memcmp(&acm->line, &newline, sizeof newline)) {
983 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 984 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
985 __func__,
986 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 987 newline.bCharFormat, newline.bParityType,
988 newline.bDataBits);
989 acm_set_line(acm, &acm->line);
990 }
991}
992
7fb57a01
HS		 993static const struct tty_port_operations acm_port_ops = {
994 .shutdown = acm_port_shutdown,
995 .activate = acm_port_activate,
996 .destruct = acm_port_destruct,
997};
998
1da177e4
LT		 999/*
1000 * USB probe and disconnect routines.
1001 */
1002
830f4021 1003/* Little helpers: write/read buffers free */
884b600f
ON		 1004static void acm_write_buffers_free(struct acm *acm)
1005{
1006 int i;
1007 struct acm_wb *wb;
a496c64f 1008 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1009
6e47e069 1010 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1011 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1012}
1013
830f4021
ON		 1014static void acm_read_buffers_free(struct acm *acm)
1015{
1016 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1017 int i;
830f4021 1018
dab54c9f 1019 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1020 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1021 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1022}
1023
884b600f
ON		 1024/* Little helper: write buffers allocate */
1025static int acm_write_buffers_alloc(struct acm *acm)
1026{
1027 int i;
1028 struct acm_wb *wb;
1029
86478944 1030 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1031 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1032 &wb->dmah);
1033 if (!wb->buf) {
1034 while (i != 0) {
1035 --i;
1036 --wb;
997ea58e 1037 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1038 wb->buf, wb->dmah);
1039 }
1040 return -ENOMEM;
1041 }
1042 }
1043 return 0;
1044}
1045
10077d4a
AC		 1046static int acm_probe(struct usb_interface *intf,
1047 const struct usb_device_id *id)
1da177e4
LT		 1048{
1049 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1050 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1051 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1052 int buflen = intf->altsetting->extralen;
1053 struct usb_interface *control_interface;
1054 struct usb_interface *data_interface;
a2bfb4a3
ON		 1055 struct usb_endpoint_descriptor *epctrl = NULL;
1056 struct usb_endpoint_descriptor *epread = NULL;
1057 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1058 struct usb_device *usb_dev = interface_to_usbdev(intf);
1059 struct acm *acm;
1060 int minor;
6e47e069 1061 int ctrlsize, readsize;
1da177e4
LT		 1062 u8 *buf;
1063 u8 ac_management_function = 0;
1064 u8 call_management_function = 0;
1065 int call_interface_num = -1;
fd5054c1 1066 int data_interface_num = -1;
1da177e4 1067 unsigned long quirks;
86478944 1068 int num_rx_buf;
61a87adf 1069 int i;
a2bfb4a3 1070 int combined_interfaces = 0;
c93d8195
AK		 1071 struct device *tty_dev;
1072 int rv = -ENOMEM;
1da177e4 1073
86478944 1074 /* normal quirks */
1da177e4 1075 quirks = (unsigned long)id->driver_info;
16142655
DT		 1076
1077 if (quirks == IGNORE_DEVICE)
1078 return -ENODEV;
1079
86478944
ON		 1080 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1081
1082 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1083 if (quirks == NO_UNION_NORMAL) {
1084 data_interface = usb_ifnum_to_if(usb_dev, 1);
1085 control_interface = usb_ifnum_to_if(usb_dev, 0);
1086 goto skip_normal_probe;
1087 }
6e47e069 1088
1da177e4
LT		 1089 /* normal probing*/
1090 if (!buffer) {
9908a32e 1091 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1092 return -EINVAL;
1093 }
1094
1095 if (!buflen) {
577045c0
TG		 1096 if (intf->cur_altsetting->endpoint &&
1097 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1098 intf->cur_altsetting->endpoint->extra) {
1099 dev_dbg(&intf->dev,
1100 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1101 buflen = intf->cur_altsetting->endpoint->extralen;
1102 buffer = intf->cur_altsetting->endpoint->extra;
1103 } else {
9908a32e
GKH		 1104 dev_err(&intf->dev,
1105 "Zero length descriptor references\n");
1da177e4
LT		 1106 return -EINVAL;
1107 }
1108 }
1109
1110 while (buflen > 0) {
6e47e069 1111 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1112 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1113 goto next_desc;
1114 }
1115
6e47e069
AC		 1116 switch (buffer[2]) {
1117 case USB_CDC_UNION_TYPE: /* we've found it */
1118 if (union_header) {
1119 dev_err(&intf->dev, "More than one "
1120 "union descriptor, skipping ...\n");
1121 goto next_desc;
1da177e4 1122 }
6e47e069
AC		 1123 union_header = (struct usb_cdc_union_desc *)buffer;
1124 break;
1125 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1126 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1127 break;
1128 case USB_CDC_HEADER_TYPE: /* maybe check version */
1129 break; /* for now we ignore it */
1130 case USB_CDC_ACM_TYPE:
1131 ac_management_function = buffer[3];
1132 break;
1133 case USB_CDC_CALL_MANAGEMENT_TYPE:
1134 call_management_function = buffer[3];
1135 call_interface_num = buffer[4];
02f824ac 1136 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1137 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1138 break;
1139 default:
1140 /* there are LOTS more CDC descriptors that
1141 * could legitimately be found here.
1142 */
1143 dev_dbg(&intf->dev, "Ignoring descriptor: "
1144 "type %02x, length %d\n",
1145 buffer[2], buffer[0]);
1146 break;
1147 }
1da177e4
LT		 1148next_desc:
1149 buflen -= buffer[0];
1150 buffer += buffer[0];
1151 }
1152
1153 if (!union_header) {
1154 if (call_interface_num > 0) {
6e47e069 1155 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1156 /* quirks for Droids MuIn LCD */
1157 if (quirks & NO_DATA_INTERFACE)
1158 data_interface = usb_ifnum_to_if(usb_dev, 0);
1159 else
1160 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1161 control_interface = intf;
1162 } else {
a2bfb4a3
ON		 1163 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1164 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1165 return -ENODEV;
1166 } else {
1167 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1168 combined_interfaces = 1;
1169 control_interface = data_interface = intf;
1170 goto look_for_collapsed_interface;
1171 }
1da177e4
LT		 1172 }
1173 } else {
1174 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1175 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1176 if (!control_interface || !data_interface) {
6e47e069 1177 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1178 return -ENODEV;
1179 }
1180 }
6e47e069 1181
1da177e4 1182 if (data_interface_num != call_interface_num)
6e47e069 1183 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1184
a2bfb4a3
ON		 1185 if (control_interface == data_interface) {
1186 /* some broken devices designed for windows work this way */
1187 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1188 combined_interfaces = 1;
1189 /* a popular other OS doesn't use it */
1190 quirks |= NO_CAP_LINE;
1191 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1192 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1193 return -EINVAL;
1194 }
1195look_for_collapsed_interface:
1196 for (i = 0; i < 3; i++) {
1197 struct usb_endpoint_descriptor *ep;
1198 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1199
1200 if (usb_endpoint_is_int_in(ep))
1201 epctrl = ep;
1202 else if (usb_endpoint_is_bulk_out(ep))
1203 epwrite = ep;
1204 else if (usb_endpoint_is_bulk_in(ep))
1205 epread = ep;
1206 else
1207 return -EINVAL;
1208 }
1209 if (!epctrl || !epread || !epwrite)
1210 return -ENODEV;
1211 else
1212 goto made_compressed_probe;
1213 }
1214
1da177e4
LT		 1215skip_normal_probe:
1216
1217 /*workaround for switched interfaces */
6e47e069
AC		 1218 if (data_interface->cur_altsetting->desc.bInterfaceClass
1219 != CDC_DATA_INTERFACE_TYPE) {
1220 if (control_interface->cur_altsetting->desc.bInterfaceClass
1221 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1222 struct usb_interface *t;
6e47e069
AC		 1223 dev_dbg(&intf->dev,
1224 "Your device has switched interfaces.\n");
1da177e4
LT		 1225 t = control_interface;
1226 control_interface = data_interface;
1227 data_interface = t;
1228 } else {
1229 return -EINVAL;
1230 }
1231 }
74da5d68
AS		 1232
1233 /* Accept probe requests only for the control interface */
a2bfb4a3 1234 if (!combined_interfaces && intf != control_interface)
74da5d68 1235 return -ENODEV;
6e47e069 1236
a2bfb4a3
ON		 1237 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1238 /* valid in this context */
6e47e069 1239 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1240 return -EBUSY;
1241 }
1242
1243
99f347ca
SS		 1244 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1245 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1246 return -EINVAL;
1247
1248 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1249 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1250 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1251
1252
1253 /* workaround for switched endpoints */
45aea704 1254 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1255 /* descriptors are swapped */
1256 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1257 dev_dbg(&intf->dev,
1258 "The data interface has switched endpoints\n");
1da177e4
LT		 1259 t = epread;
1260 epread = epwrite;
1261 epwrite = t;
1262 }
a2bfb4a3 1263made_compressed_probe:
a5cc7ef9 1264 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1265
6e47e069
AC		 1266 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1267 if (acm == NULL) {
255ab56c 1268 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1269 goto alloc_fail;
1270 }
1da177e4 1271
7fb57a01
HS		 1272 minor = acm_alloc_minor(acm);
1273 if (minor == ACM_TTY_MINORS) {
1274 dev_err(&intf->dev, "no more free acm devices\n");
1275 kfree(acm);
1276 return -ENODEV;
1277 }
1278
29cc8897
KM		 1279 ctrlsize = usb_endpoint_maxp(epctrl);
1280 readsize = usb_endpoint_maxp(epread) *
6e47e069 1281 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1282 acm->combined_interfaces = combined_interfaces;
29cc8897 1283 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1284 acm->control = control_interface;
1285 acm->data = data_interface;
1286 acm->minor = minor;
1287 acm->dev = usb_dev;
1288 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1289 if (quirks & NO_CAP_LINE)
1290 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1291 acm->ctrlsize = ctrlsize;
1292 acm->readsize = readsize;
86478944 1293 acm->rx_buflimit = num_rx_buf;
c4028958 1294 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1295 init_waitqueue_head(&acm->wioctl);
884b600f 1296 spin_lock_init(&acm->write_lock);
61a87adf 1297 spin_lock_init(&acm->read_lock);
1365baf7 1298 mutex_init(&acm->mutex);
61a87adf 1299 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1300 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1301 if (acm->is_int_ep)
1302 acm->bInterval = epread->bInterval;
739e0285
AC		 1303 tty_port_init(&acm->port);
1304 acm->port.ops = &acm_port_ops;
140cb81a 1305 init_usb_anchor(&acm->delayed);
1da177e4 1306
997ea58e 1307 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1308 if (!buf) {
255ab56c 1309 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1310 goto alloc_fail2;
1311 }
1312 acm->ctrl_buffer = buf;
1313
884b600f 1314 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1315 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1316 goto alloc_fail4;
1317 }
1da177e4
LT		 1318
1319 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1320 if (!acm->ctrlurb) {
255ab56c 1321 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1322 goto alloc_fail5;
1323 }
86478944 1324 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1325 struct acm_rb *rb = &(acm->read_buffers[i]);
1326 struct urb *urb;
61a87adf 1327
74f5e1ba
JH		 1328 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1329 &rb->dma);
1330 if (!rb->base) {
1331 dev_err(&intf->dev, "out of memory "
1332 "(read bufs usb_alloc_coherent)\n");
1333 goto alloc_fail6;
1334 }
088c64f8
JH		 1335 rb->index = i;
1336 rb->instance = acm;
74f5e1ba 1337
088c64f8
JH		 1338 urb = usb_alloc_urb(0, GFP_KERNEL);
1339 if (!urb) {
255ab56c 1340 dev_err(&intf->dev,
6e47e069 1341 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1342 goto alloc_fail6;
61a87adf 1343 }
088c64f8
JH		 1344 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1345 urb->transfer_dma = rb->dma;
1346 if (acm->is_int_ep) {
1347 usb_fill_int_urb(urb, acm->dev,
1348 acm->rx_endpoint,
1349 rb->base,
1350 acm->readsize,
1351 acm_read_bulk_callback, rb,
1352 acm->bInterval);
1353 } else {
1354 usb_fill_bulk_urb(urb, acm->dev,
1355 acm->rx_endpoint,
1356 rb->base,
1357 acm->readsize,
1358 acm_read_bulk_callback, rb);
1359 }
61a87adf 1360
088c64f8
JH		 1361 acm->read_urbs[i] = urb;
1362 __set_bit(i, &acm->read_urbs_free);
61a87adf 1363 }
6e47e069 1364 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1365 struct acm_wb *snd = &(acm->wb[i]);
1366
6e47e069
AC		 1367 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1368 if (snd->urb == NULL) {
255ab56c 1369 dev_err(&intf->dev,
59d7fec7 1370 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1371 goto alloc_fail7;
e4cf3aa8
DE		 1372 }
1373
5186ffee
AL		 1374 if (usb_endpoint_xfer_int(epwrite))
1375 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1376 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1377 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1378 else
1379 usb_fill_bulk_urb(snd->urb, usb_dev,
1380 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1381 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1382 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1383 snd->instance = acm;
1da177e4
LT		 1384 }
1385
6e47e069 1386 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1387
1388 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1389 if (i < 0)
74f5e1ba 1390 goto alloc_fail7;
c4cabd28
ON		 1391
1392 if (cfd) { /* export the country data */
1393 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1394 if (!acm->country_codes)
1395 goto skip_countries;
1396 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1397 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1398 cfd->bLength - 4);
c4cabd28
ON		 1399 acm->country_rel_date = cfd->iCountryCodeRelDate;
1400
1401 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1402 if (i < 0) {
1403 kfree(acm->country_codes);
e7c8e860
JL		 1404 acm->country_codes = NULL;
1405 acm->country_code_size = 0;
c4cabd28
ON		 1406 goto skip_countries;
1407 }
1408
6e47e069
AC		 1409 i = device_create_file(&intf->dev,
1410 &dev_attr_iCountryCodeRelDate);
c4cabd28 1411 if (i < 0) {
c2572b78 1412 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1413 kfree(acm->country_codes);
e7c8e860
JL		 1414 acm->country_codes = NULL;
1415 acm->country_code_size = 0;
c4cabd28
ON		 1416 goto skip_countries;
1417 }
1418 }
1419
1420skip_countries:
6e47e069 1421 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1422 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1423 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1424 /* works around buggy devices */
d102e78f 1425 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1426 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1427 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1428
1da177e4
LT		 1429 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1430
1431 acm_set_control(acm, acm->ctrlout);
1432
1433 acm->line.dwDTERate = cpu_to_le32(9600);
1434 acm->line.bDataBits = 8;
1435 acm_set_line(acm, &acm->line);
1436
1437 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1438 usb_set_intfdata(data_interface, acm);
1da177e4 1439
83ef344a 1440 usb_get_intf(control_interface);
c93d8195 1441 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1442 &control_interface->dev);
c93d8195
AK		 1443 if (IS_ERR(tty_dev)) {
1444 rv = PTR_ERR(tty_dev);
1445 goto alloc_fail8;
1446 }
1da177e4 1447
c4cabd28 1448 return 0;
c93d8195
AK		 1449alloc_fail8:
1450 if (acm->country_codes) {
1451 device_remove_file(&acm->control->dev,
1452 &dev_attr_wCountryCodes);
1453 device_remove_file(&acm->control->dev,
1454 &dev_attr_iCountryCodeRelDate);
1455 }
1456 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1457alloc_fail7:
c93d8195 1458 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1459 for (i = 0; i < ACM_NW; i++)
1460 usb_free_urb(acm->wb[i].urb);
c2572b78 1461alloc_fail6:
86478944 1462 for (i = 0; i < num_rx_buf; i++)
088c64f8 1463 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1464 acm_read_buffers_free(acm);
1da177e4
LT		 1465 usb_free_urb(acm->ctrlurb);
1466alloc_fail5:
884b600f 1467 acm_write_buffers_free(acm);
1da177e4 1468alloc_fail4:
997ea58e 1469 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1470alloc_fail2:
7fb57a01 1471 acm_release_minor(acm);
1da177e4
LT		 1472 kfree(acm);
1473alloc_fail:
c93d8195 1474 return rv;
1da177e4
LT		 1475}
1476
1365baf7
ON		 1477static void stop_data_traffic(struct acm *acm)
1478{
1479 int i;
a5cc7ef9
JH		 1480
1481 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1482
1365baf7 1483 usb_kill_urb(acm->ctrlurb);
6e47e069 1484 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1485 usb_kill_urb(acm->wb[i].urb);
1365baf7 1486 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1487 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1488
1489 cancel_work_sync(&acm->work);
1490}
1491
1da177e4
LT		 1492static void acm_disconnect(struct usb_interface *intf)
1493{
c4cabd28 1494 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1495 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1496 struct tty_struct *tty;
7fb57a01
HS		 1497 int i;
1498
1499 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1500
672c4e18
DB		 1501 /* sibling interface is already cleaning up */
1502 if (!acm)
86067eea 1503 return;
672c4e18 1504
7fb57a01
HS		 1505 mutex_lock(&acm->mutex);
1506 acm->disconnected = true;
6e47e069 1507 if (acm->country_codes) {
74da5d68
AS		 1508 device_remove_file(&acm->control->dev,
1509 &dev_attr_wCountryCodes);
1510 device_remove_file(&acm->control->dev,
1511 &dev_attr_iCountryCodeRelDate);
c4cabd28 1512 }
5a6a62bd 1513 wake_up_all(&acm->wioctl);
74da5d68 1514 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1515 usb_set_intfdata(acm->control, NULL);
1516 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1517 mutex_unlock(&acm->mutex);
1518
1519 tty = tty_port_tty_get(&acm->port);
1520 if (tty) {
1521 tty_vhangup(tty);
1522 tty_kref_put(tty);
1523 }
1da177e4 1524
1365baf7 1525 stop_data_traffic(acm);
1da177e4 1526
cb25505f
JH		 1527 tty_unregister_device(acm_tty_driver, acm->minor);
1528
7fb57a01
HS		 1529 usb_free_urb(acm->ctrlurb);
1530 for (i = 0; i < ACM_NW; i++)
1531 usb_free_urb(acm->wb[i].urb);
1532 for (i = 0; i < acm->rx_buflimit; i++)
1533 usb_free_urb(acm->read_urbs[i]);
884b600f 1534 acm_write_buffers_free(acm);
7fb57a01 1535 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1536 acm_read_buffers_free(acm);
1da177e4 1537
a2bfb4a3
ON		 1538 if (!acm->combined_interfaces)
1539 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1540 acm->data : acm->control);
1da177e4 1541
7fb57a01 1542 tty_port_put(&acm->port);
1da177e4
LT		 1543}
1544
35758589 1545#ifdef CONFIG_PM
1365baf7
ON		 1546static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1547{
1548 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1549 int cnt;
1550
bbf0cb3e 1551 spin_lock_irq(&acm->write_lock);
5b1b0b81 1552 if (PMSG_IS_AUTO(message)) {
5a345c20 1553 if (acm->transmitting) {
bbf0cb3e 1554 spin_unlock_irq(&acm->write_lock);
11ea859d 1555 return -EBUSY;
5a345c20 1556 }
11ea859d 1557 }
11ea859d 1558 cnt = acm->susp_count++;
bbf0cb3e 1559 spin_unlock_irq(&acm->write_lock);
1365baf7 1560
11ea859d 1561 if (cnt)
1365baf7 1562 return 0;
1365baf7 1563
ed797074 1564 stop_data_traffic(acm);
1365baf7 1565
1365baf7
ON		 1566 return 0;
1567}
1568
1569static int acm_resume(struct usb_interface *intf)
1570{
1571 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1572 struct urb *urb;
1365baf7
ON		 1573 int rv = 0;
1574
bbf0cb3e 1575 spin_lock_irq(&acm->write_lock);
11ea859d 1576
e144ed28
JH		 1577 if (--acm->susp_count)
1578 goto out;
1365baf7 1579
7fb57a01 1580 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1581 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1582
140cb81a
JH		 1583 for (;;) {
1584 urb = usb_get_from_anchor(&acm->delayed);
1585 if (!urb)
1586 break;
1587
1588 acm_start_wb(acm, urb->context);
97d35f95
ON		 1589 }
1590
1591 /*
1592 * delayed error checking because we must
1593 * do the write path at all cost
1594 */
1365baf7 1595 if (rv < 0)
e144ed28 1596 goto out;
1365baf7 1597
e144ed28 1598 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1599 }
e144ed28 1600out:
bbf0cb3e 1601 spin_unlock_irq(&acm->write_lock);
1365baf7 1602
1365baf7
ON		 1603 return rv;
1604}
35758589 1605
a91b0c50
FL		 1606static int acm_reset_resume(struct usb_interface *intf)
1607{
1608 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1609
aa27a094
JS		 1610 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1611 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1612
a91b0c50
FL		 1613 return acm_resume(intf);
1614}
1615
35758589 1616#endif /* CONFIG_PM */
c1479a92
AT		 1617
1618#define NOKIA_PCSUITE_ACM_INFO(x) \
1619 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1620 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1621 USB_CDC_ACM_PROTO_VENDOR)
1622
4035e456
TG		 1623#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1624 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1625 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1626 USB_CDC_ACM_PROTO_VENDOR)
1627
1da177e4
LT		 1628/*
1629 * USB driver structure.
1630 */
1631
6ef4852b 1632static const struct usb_device_id acm_ids[] = {
1da177e4 1633 /* quirky and broken devices */
3b59d16c
DC		 1634 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1635 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1636 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1637 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1638 },
b0e2a705
AA		 1639 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1640 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1641 },
0f9c7b4a
AL		 1642 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1643 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1644 },
8753e65e
MO		 1645 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1646 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1647 },
91a9c921
CM		 1648 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1649 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1650 },
7abcf20b
AC		 1651 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1652 .driver_info = SINGLE_RX_URB,
1653 },
86478944
ON		 1654 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1655 .driver_info = SINGLE_RX_URB, /* firmware bug */
1656 },
3dd2ae81
ON		 1657 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1658 .driver_info = SINGLE_RX_URB, /* firmware bug */
1659 },
9be8456c
ON		 1660 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1662 },
6149ed5e
IM		 1663 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1665 },
c8fd2c37
ES		 1666 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
c89c60e9
AC		 1669 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1671 },
cab98a0a
XK		 1672 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1674 },
155df65a
DT		 1675 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1676 },
6abff5dc
KH		 1677 /* Motorola H24 HSPA module: */
1678 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1679 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1680 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1681 },
1682 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1683 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1684 },
1685 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1686 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1687 },
1688 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1689 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1690 },
1691 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1692 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1693 },
1694 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1695 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1696 },
1697 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1698 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1699 },
6abff5dc 1700
c332b4e1
AR		 1701 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1702 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1703 data interface instead of
1704 communications interface.
1705 Maybe we should define a new
1706 quirk for this. */
1707 },
e7d491a1
JCR		 1708 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1709 .driver_info = NO_UNION_NORMAL,
1710 },
036915a7
DL		 1711 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1712 .driver_info = NO_UNION_NORMAL,
1713 },
1f17c502
KK		 1714 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1715 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1716 },
c3baa19b
RN		 1717 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1718 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1719 },
9be8456c 1720
c1479a92
AT		 1721 /* Nokia S60 phones expose two ACM channels. The first is
1722 * a modem and is picked up by the standard AT-command
1723 * information below. The second is 'vendor-specific' but
1724 * is treated as a serial device at the S60 end, so we want
1725 * to expose it on Linux too. */
1726 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1727 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1728 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1732 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1737 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1739 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1740 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1741 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1743 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1744 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1746 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1747 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1748 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1749 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1750 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1751 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1753 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1754 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1755 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1756 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1757 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1758 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1762 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1764 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1765 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1766 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1767 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1768 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1769 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1770 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1773 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1777 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1778 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1780 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1781 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1782 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1783 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1784
65e52f41
DP		 1785 /* Support for Owen devices */
1786 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1787
c1479a92
AT		 1788 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1789
7c5d8c39 1790 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1791 { USB_DEVICE(0x0694, 0xff00),
1792 .driver_info = NOT_A_MODEM,
7893afc0 1793 },
7c5d8c39 1794
fd5054c1
ES		 1795 /* Support for Droids MuIn LCD */
1796 { USB_DEVICE(0x04d8, 0x000b),
1797 .driver_info = NO_DATA_INTERFACE,
1798 },
1799
16142655
DT		 1800#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1801 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1802 .driver_info = IGNORE_DEVICE,
1803 },
1804 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1805 .driver_info = IGNORE_DEVICE,
1806 },
1807#endif
1808
5b239f0a
PC		 1809 /* control interfaces without any protocol set */
1810 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1811 USB_CDC_PROTO_NONE) },
1812
1da177e4
LT		 1813 /* control interfaces with various AT-command sets */
1814 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1815 USB_CDC_ACM_PROTO_AT_V25TER) },
1816 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1817 USB_CDC_ACM_PROTO_AT_PCCA101) },
1818 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1819 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1820 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1821 USB_CDC_ACM_PROTO_AT_GSM) },
1822 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1823 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1824 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1825 USB_CDC_ACM_PROTO_AT_CDMA) },
1826
1da177e4
LT		 1827 { }
1828};
1829
6e47e069 1830MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1831
1832static struct usb_driver acm_driver = {
1da177e4
LT		 1833 .name = "cdc_acm",
1834 .probe = acm_probe,
1835 .disconnect = acm_disconnect,
35758589 1836#ifdef CONFIG_PM
1365baf7
ON		 1837 .suspend = acm_suspend,
1838 .resume = acm_resume,
a91b0c50 1839 .reset_resume = acm_reset_resume,
35758589 1840#endif
1da177e4 1841 .id_table = acm_ids,
35758589 1842#ifdef CONFIG_PM
1365baf7 1843 .supports_autosuspend = 1,
35758589 1844#endif
e1f12eb6 1845 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1846};
1847
1848/*
1849 * TTY driver structures.
1850 */
1851
b68e31d0 1852static const struct tty_operations acm_ops = {
7fb57a01 1853 .install = acm_tty_install,
1da177e4
LT		 1854 .open = acm_tty_open,
1855 .close = acm_tty_close,
7fb57a01 1856 .cleanup = acm_tty_cleanup,
10077d4a 1857 .hangup = acm_tty_hangup,
1da177e4
LT		 1858 .write = acm_tty_write,
1859 .write_room = acm_tty_write_room,
1860 .ioctl = acm_tty_ioctl,
1861 .throttle = acm_tty_throttle,
1862 .unthrottle = acm_tty_unthrottle,
1863 .chars_in_buffer = acm_tty_chars_in_buffer,
1864 .break_ctl = acm_tty_break_ctl,
1865 .set_termios = acm_tty_set_termios,
1866 .tiocmget = acm_tty_tiocmget,
1867 .tiocmset = acm_tty_tiocmset,
1868};
1869
1870/*
1871 * Init / exit.
1872 */
1873
1874static int __init acm_init(void)
1875{
1876 int retval;
1877 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1878 if (!acm_tty_driver)
1879 return -ENOMEM;
1da177e4
LT		 1880 acm_tty_driver->driver_name = "acm",
1881 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1882 acm_tty_driver->major = ACM_TTY_MAJOR,
1883 acm_tty_driver->minor_start = 0,
1884 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1885 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1886 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1887 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1888 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1889 HUPCL | CLOCAL;
1da177e4
LT		 1890 tty_set_operations(acm_tty_driver, &acm_ops);
1891
1892 retval = tty_register_driver(acm_tty_driver);
1893 if (retval) {
1894 put_tty_driver(acm_tty_driver);
1895 return retval;
1896 }
1897
1898 retval = usb_register(&acm_driver);
1899 if (retval) {
1900 tty_unregister_driver(acm_tty_driver);
1901 put_tty_driver(acm_tty_driver);
1902 return retval;
1903 }
1904
a2c7b935 1905 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1906
1907 return 0;
1908}
1909
1910static void __exit acm_exit(void)
1911{
1912 usb_deregister(&acm_driver);
1913 tty_unregister_driver(acm_tty_driver);
1914 put_tty_driver(acm_tty_driver);
1915}
1916
1917module_init(acm_init);
1918module_exit(acm_exit);
1919
6e47e069
AC		 1920MODULE_AUTHOR(DRIVER_AUTHOR);
1921MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1922MODULE_LICENSE("GPL");
e766aeb8 1923MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)