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USB: cdc-acm: fix open and suspend race
[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__);
7fb57a01 531 goto error_submit_urb;
1da177e4
LT		 532 }
533
7fb57a01
HS		 534 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
535 if (acm_set_control(acm, acm->ctrlout) < 0 &&
070c0b17 536 (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
7fb57a01 537 goto error_set_control;
070c0b17 538 }
10077d4a 539
6c4707f3
OM		 540 /*
541 * Unthrottle device in case the TTY was closed while throttled.
542 */
543 spin_lock_irq(&acm->read_lock);
544 acm->throttled = 0;
545 acm->throttle_req = 0;
546 spin_unlock_irq(&acm->read_lock);
547
088c64f8 548 if (acm_submit_read_urbs(acm, GFP_KERNEL))
7fb57a01 549 goto error_submit_read_urbs;
2b626dc1 550
703df329
JH		 551 usb_autopm_put_interface(acm->control);
552
1365baf7 553 mutex_unlock(&acm->mutex);
1da177e4 554
7fb57a01
HS		 555 return 0;
556
557error_submit_read_urbs:
558 acm->ctrlout = 0;
559 acm_set_control(acm, acm->ctrlout);
560error_set_control:
561 usb_kill_urb(acm->ctrlurb);
562error_submit_urb:
703df329 563 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 564error_get_interface:
565disconnected:
566 mutex_unlock(&acm->mutex);
567 return retval;
1da177e4
LT		 568}
569
7fb57a01 570static void acm_port_destruct(struct tty_port *port)
83ef344a 571{
7fb57a01
HS		 572 struct acm *acm = container_of(port, struct acm, port);
573
574 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 575
7fb57a01 576 acm_release_minor(acm);
83ef344a 577 usb_put_intf(acm->control);
c4cabd28 578 kfree(acm->country_codes);
83ef344a 579 kfree(acm);
580}
581
7fb57a01 582static void acm_port_shutdown(struct tty_port *port)
10077d4a 583{
7fb57a01 584 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 585 struct urb *urb;
586 struct acm_wb *wb;
dab54c9f
JH		 587 int i;
588
7fb57a01
HS		 589 dev_dbg(&acm->control->dev, "%s\n", __func__);
590
591 mutex_lock(&acm->mutex);
592 if (!acm->disconnected) {
10077d4a
AC		 593 usb_autopm_get_interface(acm->control);
594 acm_set_control(acm, acm->ctrlout = 0);
140cb81a
JH		 595
596 for (;;) {
597 urb = usb_get_from_anchor(&acm->delayed);
598 if (!urb)
599 break;
600 wb = urb->context;
601 wb->use = 0;
602 usb_autopm_put_interface_async(acm->control);
603 }
604
10077d4a
AC		 605 usb_kill_urb(acm->ctrlurb);
606 for (i = 0; i < ACM_NW; i++)
607 usb_kill_urb(acm->wb[i].urb);
dab54c9f 608 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 609 usb_kill_urb(acm->read_urbs[i]);
10077d4a
AC		 610 acm->control->needs_remote_wakeup = 0;
611 usb_autopm_put_interface(acm->control);
612 }
7fb57a01
HS		 613 mutex_unlock(&acm->mutex);
614}
615
616static void acm_tty_cleanup(struct tty_struct *tty)
617{
618 struct acm *acm = tty->driver_data;
619 dev_dbg(&acm->control->dev, "%s\n", __func__);
620 tty_port_put(&acm->port);
10077d4a
AC		 621}
622
623static void acm_tty_hangup(struct tty_struct *tty)
624{
625 struct acm *acm = tty->driver_data;
7fb57a01 626 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 627 tty_port_hangup(&acm->port);
10077d4a
AC		 628}
629
1da177e4
LT		 630static void acm_tty_close(struct tty_struct *tty, struct file *filp)
631{
632 struct acm *acm = tty->driver_data;
7fb57a01
HS		 633 dev_dbg(&acm->control->dev, "%s\n", __func__);
634 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 635}
636
6e47e069
AC		 637static int acm_tty_write(struct tty_struct *tty,
638 const unsigned char *buf, int count)
1da177e4
LT		 639{
640 struct acm *acm = tty->driver_data;
641 int stat;
884b600f
ON		 642 unsigned long flags;
643 int wbn;
644 struct acm_wb *wb;
645
1da177e4
LT		 646 if (!count)
647 return 0;
648
5e9e75f8 649 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 650
884b600f 651 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 652 wbn = acm_wb_alloc(acm);
653 if (wbn < 0) {
884b600f 654 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 655 return 0;
656 }
657 wb = &acm->wb[wbn];
1da177e4 658
71c2fb03
GKH		 659 if (!acm->dev) {
660 wb->use = 0;
661 spin_unlock_irqrestore(&acm->write_lock, flags);
662 return -ENODEV;
663 }
664
884b600f 665 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 666 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 667 memcpy(wb->buf, buf, count);
668 wb->len = count;
71c2fb03 669
183a4508
JH		 670 stat = usb_autopm_get_interface_async(acm->control);
671 if (stat) {
672 wb->use = 0;
673 spin_unlock_irqrestore(&acm->write_lock, flags);
674 return stat;
675 }
676
71c2fb03 677 if (acm->susp_count) {
140cb81a 678 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 679 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 680 return count;
71c2fb03
GKH		 681 }
682 usb_mark_last_busy(acm->dev);
683
684 stat = acm_start_wb(acm, wb);
884b600f 685 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 686
6e47e069 687 if (stat < 0)
1da177e4 688 return stat;
1da177e4
LT		 689 return count;
690}
691
692static int acm_tty_write_room(struct tty_struct *tty)
693{
694 struct acm *acm = tty->driver_data;
884b600f
ON		 695 /*
696 * Do not let the line discipline to know that we have a reserve,
697 * or it might get too enthusiastic.
698 */
934da463 699 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 700}
701
702static int acm_tty_chars_in_buffer(struct tty_struct *tty)
703{
704 struct acm *acm = tty->driver_data;
7fb57a01
HS		 705 /*
706 * if the device was unplugged then any remaining characters fell out
707 * of the connector ;)
708 */
709 if (acm->disconnected)
23198fda 710 return 0;
884b600f
ON		 711 /*
712 * This is inaccurate (overcounts), but it works.
713 */
86478944 714 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 715}
716
717static void acm_tty_throttle(struct tty_struct *tty)
718{
719 struct acm *acm = tty->driver_data;
088c64f8 720
088c64f8
JH		 721 spin_lock_irq(&acm->read_lock);
722 acm->throttle_req = 1;
723 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 724}
725
726static void acm_tty_unthrottle(struct tty_struct *tty)
727{
728 struct acm *acm = tty->driver_data;
088c64f8
JH		 729 unsigned int was_throttled;
730
088c64f8
JH		 731 spin_lock_irq(&acm->read_lock);
732 was_throttled = acm->throttled;
733 acm->throttled = 0;
734 acm->throttle_req = 0;
735 spin_unlock_irq(&acm->read_lock);
736
737 if (was_throttled)
738 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 739}
740
9e98966c 741static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 742{
743 struct acm *acm = tty->driver_data;
9e98966c 744 int retval;
7fb57a01 745
9e98966c
AC		 746 retval = acm_send_break(acm, state ? 0xffff : 0);
747 if (retval < 0)
a5cc7ef9
JH		 748 dev_dbg(&acm->control->dev, "%s - send break failed\n",
749 __func__);
9e98966c 750 return retval;
1da177e4
LT		 751}
752
60b33c13 753static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 754{
755 struct acm *acm = tty->driver_data;
756
1da177e4
LT		 757 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
758 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
759 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
760 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
761 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
762 TIOCM_CTS;
763}
764
20b9d177 765static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 766 unsigned int set, unsigned int clear)
767{
768 struct acm *acm = tty->driver_data;
769 unsigned int newctrl;
770
1da177e4 771 newctrl = acm->ctrlout;
6e47e069
AC		 772 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
773 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
774 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
775 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 776
777 newctrl = (newctrl & ~clear) | set;
778
779 if (acm->ctrlout == newctrl)
780 return 0;
781 return acm_set_control(acm, acm->ctrlout = newctrl);
782}
783
18c75720
ON		 784static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
785{
786 struct serial_struct tmp;
787
788 if (!info)
789 return -EINVAL;
790
791 memset(&tmp, 0, sizeof(tmp));
792 tmp.flags = ASYNC_LOW_LATENCY;
793 tmp.xmit_fifo_size = acm->writesize;
794 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 795 tmp.close_delay = acm->port.close_delay / 10;
796 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
797 ASYNC_CLOSING_WAIT_NONE :
798 acm->port.closing_wait / 10;
18c75720
ON		 799
800 if (copy_to_user(info, &tmp, sizeof(tmp)))
801 return -EFAULT;
802 else
803 return 0;
804}
805
ba2d8ce9
DW		 806static int set_serial_info(struct acm *acm,
807 struct serial_struct __user *newinfo)
808{
809 struct serial_struct new_serial;
810 unsigned int closing_wait, close_delay;
811 int retval = 0;
812
813 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
814 return -EFAULT;
815
816 close_delay = new_serial.close_delay * 10;
817 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
818 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
819
820 mutex_lock(&acm->port.mutex);
821
822 if (!capable(CAP_SYS_ADMIN)) {
823 if ((close_delay != acm->port.close_delay) ||
824 (closing_wait != acm->port.closing_wait))
825 retval = -EPERM;
826 else
827 retval = -EOPNOTSUPP;
828 } else {
829 acm->port.close_delay = close_delay;
830 acm->port.closing_wait = closing_wait;
831 }
832
833 mutex_unlock(&acm->port.mutex);
834 return retval;
835}
836
5a6a62bd
ON		 837static int wait_serial_change(struct acm *acm, unsigned long arg)
838{
839 int rv = 0;
840 DECLARE_WAITQUEUE(wait, current);
841 struct async_icount old, new;
842
843 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
844 return -EINVAL;
845 do {
846 spin_lock_irq(&acm->read_lock);
847 old = acm->oldcount;
848 new = acm->iocount;
849 acm->oldcount = new;
850 spin_unlock_irq(&acm->read_lock);
851
852 if ((arg & TIOCM_DSR) &&
853 old.dsr != new.dsr)
854 break;
855 if ((arg & TIOCM_CD) &&
856 old.dcd != new.dcd)
857 break;
858 if ((arg & TIOCM_RI) &&
859 old.rng != new.rng)
860 break;
861
862 add_wait_queue(&acm->wioctl, &wait);
863 set_current_state(TASK_INTERRUPTIBLE);
864 schedule();
865 remove_wait_queue(&acm->wioctl, &wait);
866 if (acm->disconnected) {
867 if (arg & TIOCM_CD)
868 break;
869 else
870 rv = -ENODEV;
871 } else {
872 if (signal_pending(current))
873 rv = -ERESTARTSYS;
874 }
875 } while (!rv);
876
877
878
879 return rv;
880}
881
797ef137
ON		 882static int get_serial_usage(struct acm *acm,
883 struct serial_icounter_struct __user *count)
884{
885 struct serial_icounter_struct icount;
886 int rv = 0;
887
888 memset(&icount, 0, sizeof(icount));
889 icount.dsr = acm->iocount.dsr;
890 icount.rng = acm->iocount.rng;
891 icount.dcd = acm->iocount.dcd;
892 icount.frame = acm->iocount.frame;
893 icount.overrun = acm->iocount.overrun;
894 icount.parity = acm->iocount.parity;
895 icount.brk = acm->iocount.brk;
896
897 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
898 rv = -EFAULT;
899
900 return rv;
901}
902
6caa76b7 903static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 904 unsigned int cmd, unsigned long arg)
1da177e4 905{
18c75720
ON		 906 struct acm *acm = tty->driver_data;
907 int rv = -ENOIOCTLCMD;
908
909 switch (cmd) {
910 case TIOCGSERIAL: /* gets serial port data */
911 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 912 break;
913 case TIOCSSERIAL:
914 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 915 break;
5a6a62bd 916 case TIOCMIWAIT:
8fdbeb26
ON		 917 rv = usb_autopm_get_interface(acm->control);
918 if (rv < 0) {
919 rv = -EIO;
920 break;
921 }
5a6a62bd 922 rv = wait_serial_change(acm, arg);
8fdbeb26 923 usb_autopm_put_interface(acm->control);
5a6a62bd 924 break;
797ef137
ON		 925 case TIOCGICOUNT:
926 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
927 break;
18c75720
ON		 928 }
929
930 return rv;
1da177e4
LT		 931}
932
6e47e069
AC		 933static void acm_tty_set_termios(struct tty_struct *tty,
934 struct ktermios *termios_old)
1da177e4
LT		 935{
936 struct acm *acm = tty->driver_data;
adc8d746 937 struct ktermios *termios = &tty->termios;
1da177e4
LT		 938 struct usb_cdc_line_coding newline;
939 int newctrl = acm->ctrlout;
940
9b80fee1 941 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 942 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
943 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 944 (termios->c_cflag & PARODD ? 1 : 2) +
945 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 946 switch (termios->c_cflag & CSIZE) {
947 case CS5:
948 newline.bDataBits = 5;
949 break;
950 case CS6:
951 newline.bDataBits = 6;
952 break;
953 case CS7:
954 newline.bDataBits = 7;
955 break;
956 case CS8:
957 default:
958 newline.bDataBits = 8;
959 break;
960 }
6e47e069 961 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 962 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
963
964 if (!newline.dwDTERate) {
965 newline.dwDTERate = acm->line.dwDTERate;
966 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 967 } else
968 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 969
970 if (newctrl != acm->ctrlout)
971 acm_set_control(acm, acm->ctrlout = newctrl);
972
973 if (memcmp(&acm->line, &newline, sizeof newline)) {
974 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 975 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
976 __func__,
977 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 978 newline.bCharFormat, newline.bParityType,
979 newline.bDataBits);
980 acm_set_line(acm, &acm->line);
981 }
982}
983
7fb57a01
HS		 984static const struct tty_port_operations acm_port_ops = {
985 .shutdown = acm_port_shutdown,
986 .activate = acm_port_activate,
987 .destruct = acm_port_destruct,
988};
989
1da177e4
LT		 990/*
991 * USB probe and disconnect routines.
992 */
993
830f4021 994/* Little helpers: write/read buffers free */
884b600f
ON		 995static void acm_write_buffers_free(struct acm *acm)
996{
997 int i;
998 struct acm_wb *wb;
a496c64f 999 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1000
6e47e069 1001 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1002 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1003}
1004
830f4021
ON		 1005static void acm_read_buffers_free(struct acm *acm)
1006{
1007 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1008 int i;
830f4021 1009
dab54c9f 1010 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1011 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1012 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1013}
1014
884b600f
ON		 1015/* Little helper: write buffers allocate */
1016static int acm_write_buffers_alloc(struct acm *acm)
1017{
1018 int i;
1019 struct acm_wb *wb;
1020
86478944 1021 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1022 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1023 &wb->dmah);
1024 if (!wb->buf) {
1025 while (i != 0) {
1026 --i;
1027 --wb;
997ea58e 1028 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1029 wb->buf, wb->dmah);
1030 }
1031 return -ENOMEM;
1032 }
1033 }
1034 return 0;
1035}
1036
10077d4a
AC		 1037static int acm_probe(struct usb_interface *intf,
1038 const struct usb_device_id *id)
1da177e4
LT		 1039{
1040 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1041 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1042 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1043 int buflen = intf->altsetting->extralen;
1044 struct usb_interface *control_interface;
1045 struct usb_interface *data_interface;
a2bfb4a3
ON		 1046 struct usb_endpoint_descriptor *epctrl = NULL;
1047 struct usb_endpoint_descriptor *epread = NULL;
1048 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1049 struct usb_device *usb_dev = interface_to_usbdev(intf);
1050 struct acm *acm;
1051 int minor;
6e47e069 1052 int ctrlsize, readsize;
1da177e4
LT		 1053 u8 *buf;
1054 u8 ac_management_function = 0;
1055 u8 call_management_function = 0;
1056 int call_interface_num = -1;
fd5054c1 1057 int data_interface_num = -1;
1da177e4 1058 unsigned long quirks;
86478944 1059 int num_rx_buf;
61a87adf 1060 int i;
a2bfb4a3 1061 int combined_interfaces = 0;
c93d8195
AK		 1062 struct device *tty_dev;
1063 int rv = -ENOMEM;
1da177e4 1064
86478944 1065 /* normal quirks */
1da177e4 1066 quirks = (unsigned long)id->driver_info;
16142655
DT		 1067
1068 if (quirks == IGNORE_DEVICE)
1069 return -ENODEV;
1070
86478944
ON		 1071 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1072
1073 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1074 if (quirks == NO_UNION_NORMAL) {
1075 data_interface = usb_ifnum_to_if(usb_dev, 1);
1076 control_interface = usb_ifnum_to_if(usb_dev, 0);
1077 goto skip_normal_probe;
1078 }
6e47e069 1079
1da177e4
LT		 1080 /* normal probing*/
1081 if (!buffer) {
9908a32e 1082 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1083 return -EINVAL;
1084 }
1085
1086 if (!buflen) {
577045c0
TG		 1087 if (intf->cur_altsetting->endpoint &&
1088 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1089 intf->cur_altsetting->endpoint->extra) {
1090 dev_dbg(&intf->dev,
1091 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1092 buflen = intf->cur_altsetting->endpoint->extralen;
1093 buffer = intf->cur_altsetting->endpoint->extra;
1094 } else {
9908a32e
GKH		 1095 dev_err(&intf->dev,
1096 "Zero length descriptor references\n");
1da177e4
LT		 1097 return -EINVAL;
1098 }
1099 }
1100
1101 while (buflen > 0) {
6e47e069 1102 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1103 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1104 goto next_desc;
1105 }
1106
6e47e069
AC		 1107 switch (buffer[2]) {
1108 case USB_CDC_UNION_TYPE: /* we've found it */
1109 if (union_header) {
1110 dev_err(&intf->dev, "More than one "
1111 "union descriptor, skipping ...\n");
1112 goto next_desc;
1da177e4 1113 }
6e47e069
AC		 1114 union_header = (struct usb_cdc_union_desc *)buffer;
1115 break;
1116 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1117 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1118 break;
1119 case USB_CDC_HEADER_TYPE: /* maybe check version */
1120 break; /* for now we ignore it */
1121 case USB_CDC_ACM_TYPE:
1122 ac_management_function = buffer[3];
1123 break;
1124 case USB_CDC_CALL_MANAGEMENT_TYPE:
1125 call_management_function = buffer[3];
1126 call_interface_num = buffer[4];
02f824ac 1127 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1128 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1129 break;
1130 default:
1131 /* there are LOTS more CDC descriptors that
1132 * could legitimately be found here.
1133 */
1134 dev_dbg(&intf->dev, "Ignoring descriptor: "
1135 "type %02x, length %d\n",
1136 buffer[2], buffer[0]);
1137 break;
1138 }
1da177e4
LT		 1139next_desc:
1140 buflen -= buffer[0];
1141 buffer += buffer[0];
1142 }
1143
1144 if (!union_header) {
1145 if (call_interface_num > 0) {
6e47e069 1146 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1147 /* quirks for Droids MuIn LCD */
1148 if (quirks & NO_DATA_INTERFACE)
1149 data_interface = usb_ifnum_to_if(usb_dev, 0);
1150 else
1151 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1152 control_interface = intf;
1153 } else {
a2bfb4a3
ON		 1154 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1155 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1156 return -ENODEV;
1157 } else {
1158 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1159 combined_interfaces = 1;
1160 control_interface = data_interface = intf;
1161 goto look_for_collapsed_interface;
1162 }
1da177e4
LT		 1163 }
1164 } else {
1165 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1166 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1167 if (!control_interface || !data_interface) {
6e47e069 1168 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1169 return -ENODEV;
1170 }
1171 }
6e47e069 1172
1da177e4 1173 if (data_interface_num != call_interface_num)
6e47e069 1174 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1175
a2bfb4a3
ON		 1176 if (control_interface == data_interface) {
1177 /* some broken devices designed for windows work this way */
1178 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1179 combined_interfaces = 1;
1180 /* a popular other OS doesn't use it */
1181 quirks |= NO_CAP_LINE;
1182 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1183 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1184 return -EINVAL;
1185 }
1186look_for_collapsed_interface:
1187 for (i = 0; i < 3; i++) {
1188 struct usb_endpoint_descriptor *ep;
1189 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1190
1191 if (usb_endpoint_is_int_in(ep))
1192 epctrl = ep;
1193 else if (usb_endpoint_is_bulk_out(ep))
1194 epwrite = ep;
1195 else if (usb_endpoint_is_bulk_in(ep))
1196 epread = ep;
1197 else
1198 return -EINVAL;
1199 }
1200 if (!epctrl || !epread || !epwrite)
1201 return -ENODEV;
1202 else
1203 goto made_compressed_probe;
1204 }
1205
1da177e4
LT		 1206skip_normal_probe:
1207
1208 /*workaround for switched interfaces */
6e47e069
AC		 1209 if (data_interface->cur_altsetting->desc.bInterfaceClass
1210 != CDC_DATA_INTERFACE_TYPE) {
1211 if (control_interface->cur_altsetting->desc.bInterfaceClass
1212 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1213 struct usb_interface *t;
6e47e069
AC		 1214 dev_dbg(&intf->dev,
1215 "Your device has switched interfaces.\n");
1da177e4
LT		 1216 t = control_interface;
1217 control_interface = data_interface;
1218 data_interface = t;
1219 } else {
1220 return -EINVAL;
1221 }
1222 }
74da5d68
AS		 1223
1224 /* Accept probe requests only for the control interface */
a2bfb4a3 1225 if (!combined_interfaces && intf != control_interface)
74da5d68 1226 return -ENODEV;
6e47e069 1227
a2bfb4a3
ON		 1228 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1229 /* valid in this context */
6e47e069 1230 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1231 return -EBUSY;
1232 }
1233
1234
99f347ca
SS		 1235 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1236 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1237 return -EINVAL;
1238
1239 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1240 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1241 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1242
1243
1244 /* workaround for switched endpoints */
45aea704 1245 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1246 /* descriptors are swapped */
1247 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1248 dev_dbg(&intf->dev,
1249 "The data interface has switched endpoints\n");
1da177e4
LT		 1250 t = epread;
1251 epread = epwrite;
1252 epwrite = t;
1253 }
a2bfb4a3 1254made_compressed_probe:
a5cc7ef9 1255 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1256
6e47e069
AC		 1257 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1258 if (acm == NULL) {
255ab56c 1259 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1260 goto alloc_fail;
1261 }
1da177e4 1262
7fb57a01
HS		 1263 minor = acm_alloc_minor(acm);
1264 if (minor == ACM_TTY_MINORS) {
1265 dev_err(&intf->dev, "no more free acm devices\n");
1266 kfree(acm);
1267 return -ENODEV;
1268 }
1269
29cc8897
KM		 1270 ctrlsize = usb_endpoint_maxp(epctrl);
1271 readsize = usb_endpoint_maxp(epread) *
6e47e069 1272 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1273 acm->combined_interfaces = combined_interfaces;
29cc8897 1274 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1275 acm->control = control_interface;
1276 acm->data = data_interface;
1277 acm->minor = minor;
1278 acm->dev = usb_dev;
1279 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1280 if (quirks & NO_CAP_LINE)
1281 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1282 acm->ctrlsize = ctrlsize;
1283 acm->readsize = readsize;
86478944 1284 acm->rx_buflimit = num_rx_buf;
c4028958 1285 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1286 init_waitqueue_head(&acm->wioctl);
884b600f 1287 spin_lock_init(&acm->write_lock);
61a87adf 1288 spin_lock_init(&acm->read_lock);
1365baf7 1289 mutex_init(&acm->mutex);
61a87adf 1290 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1291 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1292 if (acm->is_int_ep)
1293 acm->bInterval = epread->bInterval;
739e0285
AC		 1294 tty_port_init(&acm->port);
1295 acm->port.ops = &acm_port_ops;
140cb81a 1296 init_usb_anchor(&acm->delayed);
1da177e4 1297
997ea58e 1298 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1299 if (!buf) {
255ab56c 1300 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1301 goto alloc_fail2;
1302 }
1303 acm->ctrl_buffer = buf;
1304
884b600f 1305 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1306 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1307 goto alloc_fail4;
1308 }
1da177e4
LT		 1309
1310 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1311 if (!acm->ctrlurb) {
255ab56c 1312 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1313 goto alloc_fail5;
1314 }
86478944 1315 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1316 struct acm_rb *rb = &(acm->read_buffers[i]);
1317 struct urb *urb;
61a87adf 1318
74f5e1ba
JH		 1319 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1320 &rb->dma);
1321 if (!rb->base) {
1322 dev_err(&intf->dev, "out of memory "
1323 "(read bufs usb_alloc_coherent)\n");
1324 goto alloc_fail6;
1325 }
088c64f8
JH		 1326 rb->index = i;
1327 rb->instance = acm;
74f5e1ba 1328
088c64f8
JH		 1329 urb = usb_alloc_urb(0, GFP_KERNEL);
1330 if (!urb) {
255ab56c 1331 dev_err(&intf->dev,
6e47e069 1332 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1333 goto alloc_fail6;
61a87adf 1334 }
088c64f8
JH		 1335 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1336 urb->transfer_dma = rb->dma;
1337 if (acm->is_int_ep) {
1338 usb_fill_int_urb(urb, acm->dev,
1339 acm->rx_endpoint,
1340 rb->base,
1341 acm->readsize,
1342 acm_read_bulk_callback, rb,
1343 acm->bInterval);
1344 } else {
1345 usb_fill_bulk_urb(urb, acm->dev,
1346 acm->rx_endpoint,
1347 rb->base,
1348 acm->readsize,
1349 acm_read_bulk_callback, rb);
1350 }
61a87adf 1351
088c64f8
JH		 1352 acm->read_urbs[i] = urb;
1353 __set_bit(i, &acm->read_urbs_free);
61a87adf 1354 }
6e47e069 1355 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1356 struct acm_wb *snd = &(acm->wb[i]);
1357
6e47e069
AC		 1358 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1359 if (snd->urb == NULL) {
255ab56c 1360 dev_err(&intf->dev,
59d7fec7 1361 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1362 goto alloc_fail7;
e4cf3aa8
DE		 1363 }
1364
5186ffee
AL		 1365 if (usb_endpoint_xfer_int(epwrite))
1366 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1367 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1368 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1369 else
1370 usb_fill_bulk_urb(snd->urb, usb_dev,
1371 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1372 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1373 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1374 snd->instance = acm;
1da177e4
LT		 1375 }
1376
6e47e069 1377 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1378
1379 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1380 if (i < 0)
74f5e1ba 1381 goto alloc_fail7;
c4cabd28
ON		 1382
1383 if (cfd) { /* export the country data */
1384 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1385 if (!acm->country_codes)
1386 goto skip_countries;
1387 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1388 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1389 cfd->bLength - 4);
c4cabd28
ON		 1390 acm->country_rel_date = cfd->iCountryCodeRelDate;
1391
1392 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1393 if (i < 0) {
1394 kfree(acm->country_codes);
e7c8e860
JL		 1395 acm->country_codes = NULL;
1396 acm->country_code_size = 0;
c4cabd28
ON		 1397 goto skip_countries;
1398 }
1399
6e47e069
AC		 1400 i = device_create_file(&intf->dev,
1401 &dev_attr_iCountryCodeRelDate);
c4cabd28 1402 if (i < 0) {
c2572b78 1403 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1404 kfree(acm->country_codes);
e7c8e860
JL		 1405 acm->country_codes = NULL;
1406 acm->country_code_size = 0;
c4cabd28
ON		 1407 goto skip_countries;
1408 }
1409 }
1410
1411skip_countries:
6e47e069 1412 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1413 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1414 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1415 /* works around buggy devices */
d102e78f 1416 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1417 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1418 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1419
1da177e4
LT		 1420 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1421
1422 acm_set_control(acm, acm->ctrlout);
1423
1424 acm->line.dwDTERate = cpu_to_le32(9600);
1425 acm->line.bDataBits = 8;
1426 acm_set_line(acm, &acm->line);
1427
1428 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1429 usb_set_intfdata(data_interface, acm);
1da177e4 1430
83ef344a 1431 usb_get_intf(control_interface);
c93d8195 1432 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1433 &control_interface->dev);
c93d8195
AK		 1434 if (IS_ERR(tty_dev)) {
1435 rv = PTR_ERR(tty_dev);
1436 goto alloc_fail8;
1437 }
1da177e4 1438
c4cabd28 1439 return 0;
c93d8195
AK		 1440alloc_fail8:
1441 if (acm->country_codes) {
1442 device_remove_file(&acm->control->dev,
1443 &dev_attr_wCountryCodes);
1444 device_remove_file(&acm->control->dev,
1445 &dev_attr_iCountryCodeRelDate);
1446 }
1447 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1448alloc_fail7:
c93d8195 1449 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1450 for (i = 0; i < ACM_NW; i++)
1451 usb_free_urb(acm->wb[i].urb);
c2572b78 1452alloc_fail6:
86478944 1453 for (i = 0; i < num_rx_buf; i++)
088c64f8 1454 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1455 acm_read_buffers_free(acm);
1da177e4
LT		 1456 usb_free_urb(acm->ctrlurb);
1457alloc_fail5:
884b600f 1458 acm_write_buffers_free(acm);
1da177e4 1459alloc_fail4:
997ea58e 1460 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1461alloc_fail2:
7fb57a01 1462 acm_release_minor(acm);
1da177e4
LT		 1463 kfree(acm);
1464alloc_fail:
c93d8195 1465 return rv;
1da177e4
LT		 1466}
1467
1365baf7
ON		 1468static void stop_data_traffic(struct acm *acm)
1469{
1470 int i;
a5cc7ef9
JH		 1471
1472 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1473
1365baf7 1474 usb_kill_urb(acm->ctrlurb);
6e47e069 1475 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1476 usb_kill_urb(acm->wb[i].urb);
1365baf7 1477 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1478 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1479
1480 cancel_work_sync(&acm->work);
1481}
1482
1da177e4
LT		 1483static void acm_disconnect(struct usb_interface *intf)
1484{
c4cabd28 1485 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1486 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1487 struct tty_struct *tty;
7fb57a01
HS		 1488 int i;
1489
1490 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1491
672c4e18
DB		 1492 /* sibling interface is already cleaning up */
1493 if (!acm)
86067eea 1494 return;
672c4e18 1495
7fb57a01
HS		 1496 mutex_lock(&acm->mutex);
1497 acm->disconnected = true;
6e47e069 1498 if (acm->country_codes) {
74da5d68
AS		 1499 device_remove_file(&acm->control->dev,
1500 &dev_attr_wCountryCodes);
1501 device_remove_file(&acm->control->dev,
1502 &dev_attr_iCountryCodeRelDate);
c4cabd28 1503 }
5a6a62bd 1504 wake_up_all(&acm->wioctl);
74da5d68 1505 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1506 usb_set_intfdata(acm->control, NULL);
1507 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1508 mutex_unlock(&acm->mutex);
1509
1510 tty = tty_port_tty_get(&acm->port);
1511 if (tty) {
1512 tty_vhangup(tty);
1513 tty_kref_put(tty);
1514 }
1da177e4 1515
1365baf7 1516 stop_data_traffic(acm);
1da177e4 1517
cb25505f
JH		 1518 tty_unregister_device(acm_tty_driver, acm->minor);
1519
7fb57a01
HS		 1520 usb_free_urb(acm->ctrlurb);
1521 for (i = 0; i < ACM_NW; i++)
1522 usb_free_urb(acm->wb[i].urb);
1523 for (i = 0; i < acm->rx_buflimit; i++)
1524 usb_free_urb(acm->read_urbs[i]);
884b600f 1525 acm_write_buffers_free(acm);
7fb57a01 1526 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1527 acm_read_buffers_free(acm);
1da177e4 1528
a2bfb4a3
ON		 1529 if (!acm->combined_interfaces)
1530 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1531 acm->data : acm->control);
1da177e4 1532
7fb57a01 1533 tty_port_put(&acm->port);
1da177e4
LT		 1534}
1535
35758589 1536#ifdef CONFIG_PM
1365baf7
ON		 1537static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1538{
1539 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1540 int cnt;
1541
5a345c20
JH		 1542 spin_lock_irq(&acm->read_lock);
1543 spin_lock(&acm->write_lock);
5b1b0b81 1544 if (PMSG_IS_AUTO(message)) {
5a345c20
JH		 1545 if (acm->transmitting) {
1546 spin_unlock(&acm->write_lock);
1547 spin_unlock_irq(&acm->read_lock);
11ea859d 1548 return -EBUSY;
5a345c20 1549 }
11ea859d 1550 }
11ea859d
ON		 1551 cnt = acm->susp_count++;
1552 spin_unlock(&acm->write_lock);
1553 spin_unlock_irq(&acm->read_lock);
1365baf7 1554
11ea859d 1555 if (cnt)
1365baf7 1556 return 0;
1365baf7 1557
ed797074 1558 stop_data_traffic(acm);
1365baf7 1559
1365baf7
ON		 1560 return 0;
1561}
1562
1563static int acm_resume(struct usb_interface *intf)
1564{
1565 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1566 struct urb *urb;
1365baf7
ON		 1567 int rv = 0;
1568
11ea859d 1569 spin_lock_irq(&acm->read_lock);
e144ed28 1570 spin_lock(&acm->write_lock);
11ea859d 1571
e144ed28
JH		 1572 if (--acm->susp_count)
1573 goto out;
1365baf7 1574
7fb57a01 1575 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1576 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1577
140cb81a
JH		 1578 for (;;) {
1579 urb = usb_get_from_anchor(&acm->delayed);
1580 if (!urb)
1581 break;
1582
1583 acm_start_wb(acm, urb->context);
97d35f95
ON		 1584 }
1585
1586 /*
1587 * delayed error checking because we must
1588 * do the write path at all cost
1589 */
1365baf7 1590 if (rv < 0)
e144ed28 1591 goto out;
1365baf7 1592
e144ed28 1593 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1594 }
e144ed28
JH		 1595out:
1596 spin_unlock(&acm->write_lock);
1597 spin_unlock_irq(&acm->read_lock);
1365baf7 1598
1365baf7
ON		 1599 return rv;
1600}
35758589 1601
a91b0c50
FL		 1602static int acm_reset_resume(struct usb_interface *intf)
1603{
1604 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1605
aa27a094
JS		 1606 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1607 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1608
a91b0c50
FL		 1609 return acm_resume(intf);
1610}
1611
35758589 1612#endif /* CONFIG_PM */
c1479a92
AT		 1613
1614#define NOKIA_PCSUITE_ACM_INFO(x) \
1615 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1616 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1617 USB_CDC_ACM_PROTO_VENDOR)
1618
4035e456
TG		 1619#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1620 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1621 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1622 USB_CDC_ACM_PROTO_VENDOR)
1623
1da177e4
LT		 1624/*
1625 * USB driver structure.
1626 */
1627
6ef4852b 1628static const struct usb_device_id acm_ids[] = {
1da177e4 1629 /* quirky and broken devices */
3b59d16c
DC		 1630 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1631 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1632 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1633 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1634 },
b0e2a705
AA		 1635 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1636 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1637 },
0f9c7b4a
AL		 1638 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1639 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1640 },
8753e65e
MO		 1641 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1642 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1643 },
91a9c921
CM		 1644 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1645 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1646 },
7abcf20b
AC		 1647 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1648 .driver_info = SINGLE_RX_URB,
1649 },
86478944
ON		 1650 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1651 .driver_info = SINGLE_RX_URB, /* firmware bug */
1652 },
3dd2ae81
ON		 1653 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1654 .driver_info = SINGLE_RX_URB, /* firmware bug */
1655 },
9be8456c
ON		 1656 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1657 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1658 },
6149ed5e
IM		 1659 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1660 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1661 },
c8fd2c37
ES		 1662 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1663 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1664 },
c89c60e9
AC		 1665 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1666 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1667 },
cab98a0a
XK		 1668 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1669 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1670 },
155df65a
DT		 1671 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1672 },
6abff5dc
KH		 1673 /* Motorola H24 HSPA module: */
1674 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1675 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1676 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1677 },
1678 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1679 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1680 },
1681 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1682 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1683 },
1684 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1685 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1686 },
1687 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1688 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1689 },
1690 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1691 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1692 },
1693 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1694 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1695 },
6abff5dc 1696
c332b4e1
AR		 1697 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1698 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1699 data interface instead of
1700 communications interface.
1701 Maybe we should define a new
1702 quirk for this. */
1703 },
e7d491a1
JCR		 1704 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1705 .driver_info = NO_UNION_NORMAL,
1706 },
036915a7
DL		 1707 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1708 .driver_info = NO_UNION_NORMAL,
1709 },
1f17c502
KK		 1710 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1711 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1712 },
c3baa19b
RN		 1713 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1714 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1715 },
9be8456c 1716
c1479a92
AT		 1717 /* Nokia S60 phones expose two ACM channels. The first is
1718 * a modem and is picked up by the standard AT-command
1719 * information below. The second is 'vendor-specific' but
1720 * is treated as a serial device at the S60 end, so we want
1721 * to expose it on Linux too. */
1722 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1723 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1724 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1725 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1727 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1728 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1737 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1739 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1740 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1741 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1742 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1743 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1744 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1745 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1746 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1747 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1750 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1751 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1753 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1754 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1755 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1756 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1757 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1758 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1759 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1762 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1763 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1764 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1765 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1766 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1768 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1769 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1772 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1774 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1775 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1776 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1777 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1779 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1780
65e52f41
DP		 1781 /* Support for Owen devices */
1782 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1783
c1479a92
AT		 1784 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1785
7c5d8c39 1786 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1787 { USB_DEVICE(0x0694, 0xff00),
1788 .driver_info = NOT_A_MODEM,
7893afc0 1789 },
7c5d8c39 1790
fd5054c1
ES		 1791 /* Support for Droids MuIn LCD */
1792 { USB_DEVICE(0x04d8, 0x000b),
1793 .driver_info = NO_DATA_INTERFACE,
1794 },
1795
16142655
DT		 1796#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1797 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1798 .driver_info = IGNORE_DEVICE,
1799 },
1800 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1801 .driver_info = IGNORE_DEVICE,
1802 },
1803#endif
1804
5b239f0a
PC		 1805 /* control interfaces without any protocol set */
1806 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1807 USB_CDC_PROTO_NONE) },
1808
1da177e4
LT		 1809 /* control interfaces with various AT-command sets */
1810 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1811 USB_CDC_ACM_PROTO_AT_V25TER) },
1812 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1813 USB_CDC_ACM_PROTO_AT_PCCA101) },
1814 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1815 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1816 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1817 USB_CDC_ACM_PROTO_AT_GSM) },
1818 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1819 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1820 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1821 USB_CDC_ACM_PROTO_AT_CDMA) },
1822
1da177e4
LT		 1823 { }
1824};
1825
6e47e069 1826MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1827
1828static struct usb_driver acm_driver = {
1da177e4
LT		 1829 .name = "cdc_acm",
1830 .probe = acm_probe,
1831 .disconnect = acm_disconnect,
35758589 1832#ifdef CONFIG_PM
1365baf7
ON		 1833 .suspend = acm_suspend,
1834 .resume = acm_resume,
a91b0c50 1835 .reset_resume = acm_reset_resume,
35758589 1836#endif
1da177e4 1837 .id_table = acm_ids,
35758589 1838#ifdef CONFIG_PM
1365baf7 1839 .supports_autosuspend = 1,
35758589 1840#endif
e1f12eb6 1841 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1842};
1843
1844/*
1845 * TTY driver structures.
1846 */
1847
b68e31d0 1848static const struct tty_operations acm_ops = {
7fb57a01 1849 .install = acm_tty_install,
1da177e4
LT		 1850 .open = acm_tty_open,
1851 .close = acm_tty_close,
7fb57a01 1852 .cleanup = acm_tty_cleanup,
10077d4a 1853 .hangup = acm_tty_hangup,
1da177e4
LT		 1854 .write = acm_tty_write,
1855 .write_room = acm_tty_write_room,
1856 .ioctl = acm_tty_ioctl,
1857 .throttle = acm_tty_throttle,
1858 .unthrottle = acm_tty_unthrottle,
1859 .chars_in_buffer = acm_tty_chars_in_buffer,
1860 .break_ctl = acm_tty_break_ctl,
1861 .set_termios = acm_tty_set_termios,
1862 .tiocmget = acm_tty_tiocmget,
1863 .tiocmset = acm_tty_tiocmset,
1864};
1865
1866/*
1867 * Init / exit.
1868 */
1869
1870static int __init acm_init(void)
1871{
1872 int retval;
1873 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1874 if (!acm_tty_driver)
1875 return -ENOMEM;
1da177e4
LT		 1876 acm_tty_driver->driver_name = "acm",
1877 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1878 acm_tty_driver->major = ACM_TTY_MAJOR,
1879 acm_tty_driver->minor_start = 0,
1880 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1881 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1882 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1883 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1884 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1885 HUPCL | CLOCAL;
1da177e4
LT		 1886 tty_set_operations(acm_tty_driver, &acm_ops);
1887
1888 retval = tty_register_driver(acm_tty_driver);
1889 if (retval) {
1890 put_tty_driver(acm_tty_driver);
1891 return retval;
1892 }
1893
1894 retval = usb_register(&acm_driver);
1895 if (retval) {
1896 tty_unregister_driver(acm_tty_driver);
1897 put_tty_driver(acm_tty_driver);
1898 return retval;
1899 }
1900
a2c7b935 1901 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1902
1903 return 0;
1904}
1905
1906static void __exit acm_exit(void)
1907{
1908 usb_deregister(&acm_driver);
1909 tty_unregister_driver(acm_tty_driver);
1910 put_tty_driver(acm_tty_driver);
1911}
1912
1913module_init(acm_init);
1914module_exit(acm_exit);
1915
6e47e069
AC		 1916MODULE_AUTHOR(DRIVER_AUTHOR);
1917MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1918MODULE_LICENSE("GPL");
e766aeb8 1919MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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