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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[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>
6cb4f4df 49#include <linux/idr.h>
61a87adf 50#include <linux/list.h>
1da177e4
LT		 51
52#include "cdc-acm.h"
53
e5fbab51 54
088c64f8 55#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
1da177e4
LT		 56#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
57
58static struct usb_driver acm_driver;
59static struct tty_driver *acm_tty_driver;
1da177e4 60
6cb4f4df
JH		 61static DEFINE_IDR(acm_minors);
62static DEFINE_MUTEX(acm_minors_lock);
1da177e4 63
24cb4502
JP		 64static void acm_tty_set_termios(struct tty_struct *tty,
65 struct ktermios *termios_old);
66
7fb57a01 67/*
6cb4f4df 68 * acm_minors accessors
7fb57a01 69 */
1da177e4 70
7fb57a01 71/*
6cb4f4df 72 * Look up an ACM structure by minor. If found and not disconnected, increment
7fb57a01
HS		 73 * its refcount and return it with its mutex held.
74 */
6cb4f4df 75static struct acm *acm_get_by_minor(unsigned int minor)
7fb57a01
HS		 76{
77 struct acm *acm;
78
6cb4f4df
JH		 79 mutex_lock(&acm_minors_lock);
80 acm = idr_find(&acm_minors, minor);
7fb57a01
HS		 81 if (acm) {
82 mutex_lock(&acm->mutex);
83 if (acm->disconnected) {
84 mutex_unlock(&acm->mutex);
85 acm = NULL;
86 } else {
87 tty_port_get(&acm->port);
88 mutex_unlock(&acm->mutex);
89 }
90 }
6cb4f4df 91 mutex_unlock(&acm_minors_lock);
7fb57a01
HS		 92 return acm;
93}
94
95/*
96 * Try to find an available minor number and if found, associate it with 'acm'.
97 */
98static int acm_alloc_minor(struct acm *acm)
99{
100 int minor;
101
6cb4f4df
JH		 102 mutex_lock(&acm_minors_lock);
103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
104 mutex_unlock(&acm_minors_lock);
7fb57a01
HS		 105
106 return minor;
107}
108
109/* Release the minor number associated with 'acm'. */
110static void acm_release_minor(struct acm *acm)
111{
6cb4f4df
JH		 112 mutex_lock(&acm_minors_lock);
113 idr_remove(&acm_minors, acm->minor);
114 mutex_unlock(&acm_minors_lock);
7fb57a01 115}
739e0285 116
1da177e4
LT		 117/*
118 * Functions for ACM control messages.
119 */
120
6e47e069
AC		 121static int acm_ctrl_msg(struct acm *acm, int request, int value,
122 void *buf, int len)
1da177e4 123{
bae3f4c5
JH		 124 int retval;
125
126 retval = usb_autopm_get_interface(acm->control);
127 if (retval)
128 return retval;
129
130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
1da177e4
LT		 131 request, USB_RT_ACM, value,
132 acm->control->altsetting[0].desc.bInterfaceNumber,
133 buf, len, 5000);
bae3f4c5 134
a5cc7ef9
JH		 135 dev_dbg(&acm->control->dev,
136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__, request, value, len, retval);
bae3f4c5
JH		 138
139 usb_autopm_put_interface(acm->control);
140
1da177e4
LT		 141 return retval < 0 ? retval : 0;
142}
143
144/* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
146 */
2a8cdfde
JH		 147static inline int acm_set_control(struct acm *acm, int control)
148{
149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
150 return -EOPNOTSUPP;
151
152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
153 control, NULL, 0);
154}
155
1da177e4
LT		 156#define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158#define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
160
884b600f
ON		 161/*
162 * Write buffer management.
163 * All of these assume proper locks taken by the caller.
164 */
165
166static int acm_wb_alloc(struct acm *acm)
167{
168 int i, wbn;
169 struct acm_wb *wb;
170
e4cf3aa8 171 wbn = 0;
884b600f
ON		 172 i = 0;
173 for (;;) {
174 wb = &acm->wb[wbn];
175 if (!wb->use) {
176 wb->use = 1;
177 return wbn;
178 }
86478944
ON		 179 wbn = (wbn + 1) % ACM_NW;
180 if (++i >= ACM_NW)
884b600f
ON		 181 return -1;
182 }
183}
184
884b600f
ON		 185static int acm_wb_is_avail(struct acm *acm)
186{
187 int i, n;
e5fbab51 188 unsigned long flags;
884b600f 189
86478944 190 n = ACM_NW;
e5fbab51 191 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 192 for (i = 0; i < ACM_NW; i++)
86478944 193 n -= acm->wb[i].use;
e5fbab51 194 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 195 return n;
196}
197
884b600f 198/*
ad0b65ef 199 * Finish write. Caller must hold acm->write_lock
884b600f 200 */
e4cf3aa8 201static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 202{
e4cf3aa8 203 wb->use = 0;
11ea859d 204 acm->transmitting--;
97d35f95 205 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 206}
207
208/*
209 * Poke write.
11ea859d
ON		 210 *
211 * the caller is responsible for locking
884b600f 212 */
11ea859d
ON		 213
214static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
215{
216 int rc;
217
218 acm->transmitting++;
219
220 wb->urb->transfer_buffer = wb->buf;
221 wb->urb->transfer_dma = wb->dmah;
222 wb->urb->transfer_buffer_length = wb->len;
223 wb->urb->dev = acm->dev;
224
6e47e069
AC		 225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
226 if (rc < 0) {
a5cc7ef9
JH		 227 dev_err(&acm->data->dev,
228 "%s - usb_submit_urb(write bulk) failed: %d\n",
229 __func__, rc);
11ea859d
ON		 230 acm_write_done(acm, wb);
231 }
232 return rc;
233}
234
c4cabd28
ON		 235/*
236 * attributes exported through sysfs
237 */
238static ssize_t show_caps
239(struct device *dev, struct device_attribute *attr, char *buf)
240{
241 struct usb_interface *intf = to_usb_interface(dev);
242 struct acm *acm = usb_get_intfdata(intf);
243
244 return sprintf(buf, "%d", acm->ctrl_caps);
245}
246static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
247
248static ssize_t show_country_codes
249(struct device *dev, struct device_attribute *attr, char *buf)
250{
251 struct usb_interface *intf = to_usb_interface(dev);
252 struct acm *acm = usb_get_intfdata(intf);
253
254 memcpy(buf, acm->country_codes, acm->country_code_size);
255 return acm->country_code_size;
256}
257
258static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
259
260static ssize_t show_country_rel_date
261(struct device *dev, struct device_attribute *attr, char *buf)
262{
263 struct usb_interface *intf = to_usb_interface(dev);
264 struct acm *acm = usb_get_intfdata(intf);
265
266 return sprintf(buf, "%d", acm->country_rel_date);
267}
884b600f 268
c4cabd28 269static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 270/*
271 * Interrupt handlers for various ACM device responses
272 */
273
274/* control interface reports status changes with "interrupt" transfers */
7d12e780 275static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 276{
277 struct acm *acm = urb->context;
278 struct usb_cdc_notification *dr = urb->transfer_buffer;
279 unsigned char *data;
280 int newctrl;
5a6a62bd 281 int difference;
185d4058
GKH		 282 int retval;
283 int status = urb->status;
1da177e4 284
185d4058 285 switch (status) {
1da177e4
LT		 286 case 0:
287 /* success */
288 break;
289 case -ECONNRESET:
290 case -ENOENT:
291 case -ESHUTDOWN:
292 /* this urb is terminated, clean up */
a5cc7ef9
JH		 293 dev_dbg(&acm->control->dev,
294 "%s - urb shutting down with status: %d\n",
295 __func__, status);
1da177e4
LT		 296 return;
297 default:
a5cc7ef9
JH		 298 dev_dbg(&acm->control->dev,
299 "%s - nonzero urb status received: %d\n",
300 __func__, status);
1da177e4
LT		 301 goto exit;
302 }
303
7e7797e7
JH		 304 usb_mark_last_busy(acm->dev);
305
1da177e4
LT		 306 data = (unsigned char *)(dr + 1);
307 switch (dr->bNotificationType) {
6e47e069 308 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
a5cc7ef9
JH		 309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
310 __func__, dr->wValue);
6e47e069 311 break;
1da177e4 312
6e47e069 313 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 314 newctrl = get_unaligned_le16(data);
1da177e4 315
aa27a094
JS		 316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
317 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
318 __func__);
319 tty_port_tty_hangup(&acm->port, false);
6e47e069 320 }
1da177e4 321
5a6a62bd
ON		 322 difference = acm->ctrlin ^ newctrl;
323 spin_lock(&acm->read_lock);
6e47e069 324 acm->ctrlin = newctrl;
5a6a62bd
ON		 325 acm->oldcount = acm->iocount;
326
327 if (difference & ACM_CTRL_DSR)
328 acm->iocount.dsr++;
329 if (difference & ACM_CTRL_BRK)
330 acm->iocount.brk++;
331 if (difference & ACM_CTRL_RI)
332 acm->iocount.rng++;
333 if (difference & ACM_CTRL_DCD)
334 acm->iocount.dcd++;
335 if (difference & ACM_CTRL_FRAMING)
336 acm->iocount.frame++;
337 if (difference & ACM_CTRL_PARITY)
338 acm->iocount.parity++;
339 if (difference & ACM_CTRL_OVERRUN)
340 acm->iocount.overrun++;
341 spin_unlock(&acm->read_lock);
342
343 if (difference)
344 wake_up_all(&acm->wioctl);
1da177e4 345
5a6a62bd 346 break;
1da177e4 347
6e47e069 348 default:
a5cc7ef9
JH		 349 dev_dbg(&acm->control->dev,
350 "%s - unknown notification %d received: index %d "
351 "len %d data0 %d data1 %d\n",
352 __func__,
6e47e069
AC		 353 dr->bNotificationType, dr->wIndex,
354 dr->wLength, data[0], data[1]);
355 break;
1da177e4
LT		 356 }
357exit:
6e47e069 358 retval = usb_submit_urb(urb, GFP_ATOMIC);
6c8074e9 359 if (retval && retval != -EPERM)
1d9846e5
JH		 360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
361 __func__, retval);
1da177e4
LT		 362}
363
088c64f8 364static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 365{
088c64f8 366 int res;
185d4058 367
088c64f8
JH		 368 if (!test_and_clear_bit(index, &acm->read_urbs_free))
369 return 0;
1da177e4 370
088c64f8
JH		 371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
372
373 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
374 if (res) {
375 if (res != -EPERM) {
376 dev_err(&acm->data->dev,
377 "%s - usb_submit_urb failed: %d\n",
378 __func__, res);
379 }
380 set_bit(index, &acm->read_urbs_free);
381 return res;
11ea859d 382 }
1da177e4 383
088c64f8
JH		 384 return 0;
385}
1da177e4 386
088c64f8
JH		 387static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
388{
389 int res;
390 int i;
61a87adf 391
088c64f8
JH		 392 for (i = 0; i < acm->rx_buflimit; ++i) {
393 res = acm_submit_read_urb(acm, i, mem_flags);
394 if (res)
395 return res;
86478944 396 }
088c64f8
JH		 397
398 return 0;
1da177e4
LT		 399}
400
088c64f8 401static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 402{
088c64f8 403 if (!urb->actual_length)
ca79b7b4 404 return;
61a87adf 405
05c7cd39
JS		 406 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
407 urb->actual_length);
2e124b4a 408 tty_flip_buffer_push(&acm->port);
088c64f8 409}
10077d4a 410
088c64f8
JH		 411static void acm_read_bulk_callback(struct urb *urb)
412{
413 struct acm_rb *rb = urb->context;
414 struct acm *acm = rb->instance;
415 unsigned long flags;
36e59e0d 416 int status = urb->status;
61a87adf 417
088c64f8
JH		 418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
419 rb->index, urb->actual_length);
61a87adf 420
088c64f8 421 if (!acm->dev) {
36e59e0d 422 set_bit(rb->index, &acm->read_urbs_free);
088c64f8
JH		 423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
424 return;
425 }
61a87adf 426
4132cd02 427 if (status) {
36e59e0d 428 set_bit(rb->index, &acm->read_urbs_free);
088c64f8 429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
36e59e0d 430 __func__, status);
19454462
LB		 431 if ((status != -ENOENT) || (urb->actual_length == 0))
432 return;
61a87adf 433 }
4a8ee505
JH		 434
435 usb_mark_last_busy(acm->dev);
436
088c64f8 437 acm_process_read_urb(acm, urb);
36e59e0d
ON		 438 /*
439 * Unthrottle may run on another CPU which needs to see events
440 * in the same order. Submission has an implict barrier
441 */
442 smp_mb__before_atomic();
443 set_bit(rb->index, &acm->read_urbs_free);
088c64f8
JH		 444
445 /* throttle device if requested by tty */
11ea859d 446 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8 447 acm->throttled = acm->throttle_req;
bbf0cb3e 448 if (!acm->throttled) {
088c64f8
JH		 449 spin_unlock_irqrestore(&acm->read_lock, flags);
450 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
451 } else {
452 spin_unlock_irqrestore(&acm->read_lock, flags);
453 }
1da177e4
LT		 454}
455
456/* data interface wrote those outgoing bytes */
7d12e780 457static void acm_write_bulk(struct urb *urb)
1da177e4 458{
cdc97792 459 struct acm_wb *wb = urb->context;
e5fbab51 460 struct acm *acm = wb->instance;
ad0b65ef 461 unsigned long flags;
4132cd02 462 int status = urb->status;
1da177e4 463
4132cd02 464 if (status || (urb->actual_length != urb->transfer_buffer_length))
4fa4626c 465 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
1d9846e5 466 __func__,
e5fbab51
DB		 467 urb->actual_length,
468 urb->transfer_buffer_length,
4132cd02 469 status);
1da177e4 470
ad0b65ef 471 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 472 acm_write_done(acm, wb);
ad0b65ef 473 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 474 schedule_work(&acm->work);
1da177e4
LT		 475}
476
c4028958 477static void acm_softint(struct work_struct *work)
1da177e4 478{
c4028958 479 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 480
1d9846e5
JH		 481 dev_vdbg(&acm->data->dev, "%s\n", __func__);
482
6aad04f2 483 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 484}
485
486/*
487 * TTY handlers
488 */
489
7fb57a01 490static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 491{
492 struct acm *acm;
7fb57a01 493 int retval;
1da177e4 494
7fb57a01 495 dev_dbg(tty->dev, "%s\n", __func__);
1da177e4 496
6cb4f4df 497 acm = acm_get_by_minor(tty->index);
7fb57a01
HS		 498 if (!acm)
499 return -ENODEV;
a5cc7ef9 500
f8a8c10f 501 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 502 if (retval)
503 goto error_init_termios;
10077d4a 504
1da177e4 505 tty->driver_data = acm;
1da177e4 506
7fb57a01
HS		 507 return 0;
508
509error_init_termios:
510 tty_port_put(&acm->port);
511 return retval;
512}
513
514static int acm_tty_open(struct tty_struct *tty, struct file *filp)
515{
516 struct acm *acm = tty->driver_data;
517
518 dev_dbg(tty->dev, "%s\n", __func__);
519
520 return tty_port_open(&acm->port, tty, filp);
521}
522
0943d8ea
JH		 523static void acm_port_dtr_rts(struct tty_port *port, int raise)
524{
525 struct acm *acm = container_of(port, struct acm, port);
526 int val;
527 int res;
528
529 if (raise)
530 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
531 else
532 val = 0;
533
534 /* FIXME: add missing ctrlout locking throughout driver */
535 acm->ctrlout = val;
536
537 res = acm_set_control(acm, val);
538 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
539 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
540}
541
7fb57a01
HS		 542static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
543{
544 struct acm *acm = container_of(port, struct acm, port);
545 int retval = -ENODEV;
e4c36076 546 int i;
7fb57a01
HS		 547
548 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 549
550 mutex_lock(&acm->mutex);
7fb57a01
HS		 551 if (acm->disconnected)
552 goto disconnected;
553
554 retval = usb_autopm_get_interface(acm->control);
555 if (retval)
556 goto error_get_interface;
557
558 /*
559 * FIXME: Why do we need this? Allocating 64K of physically contiguous
560 * memory is really nasty...
561 */
562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
563 acm->control->needs_remote_wakeup = 1;
1365baf7 564
1da177e4 565 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
567 if (retval) {
a5cc7ef9
JH		 568 dev_err(&acm->control->dev,
569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 570 goto error_submit_urb;
1da177e4
LT		 571 }
572
24cb4502
JP		 573 acm_tty_set_termios(tty, NULL);
574
6c4707f3
OM		 575 /*
576 * Unthrottle device in case the TTY was closed while throttled.
577 */
578 spin_lock_irq(&acm->read_lock);
579 acm->throttled = 0;
580 acm->throttle_req = 0;
581 spin_unlock_irq(&acm->read_lock);
582
8727bf68
JH		 583 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
584 if (retval)
7fb57a01 585 goto error_submit_read_urbs;
2b626dc1 586
703df329
JH		 587 usb_autopm_put_interface(acm->control);
588
1365baf7 589 mutex_unlock(&acm->mutex);
1da177e4 590
7fb57a01
HS		 591 return 0;
592
593error_submit_read_urbs:
e4c36076
JH		 594 for (i = 0; i < acm->rx_buflimit; i++)
595 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 596 usb_kill_urb(acm->ctrlurb);
597error_submit_urb:
703df329 598 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 599error_get_interface:
600disconnected:
601 mutex_unlock(&acm->mutex);
8727bf68
JH		 602
603 return usb_translate_errors(retval);
1da177e4
LT		 604}
605
7fb57a01 606static void acm_port_destruct(struct tty_port *port)
83ef344a 607{
7fb57a01
HS		 608 struct acm *acm = container_of(port, struct acm, port);
609
610 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 611
7fb57a01 612 acm_release_minor(acm);
83ef344a 613 usb_put_intf(acm->control);
c4cabd28 614 kfree(acm->country_codes);
83ef344a 615 kfree(acm);
616}
617
7fb57a01 618static void acm_port_shutdown(struct tty_port *port)
10077d4a 619{
7fb57a01 620 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 621 struct urb *urb;
622 struct acm_wb *wb;
dab54c9f
JH		 623 int i;
624
7fb57a01
HS		 625 dev_dbg(&acm->control->dev, "%s\n", __func__);
626
b1d42efc
JH		 627 /*
628 * Need to grab write_lock to prevent race with resume, but no need to
629 * hold it due to the tty-port initialised flag.
630 */
631 spin_lock_irq(&acm->write_lock);
632 spin_unlock_irq(&acm->write_lock);
633
634 usb_autopm_get_interface_no_resume(acm->control);
635 acm->control->needs_remote_wakeup = 0;
636 usb_autopm_put_interface(acm->control);
637
89e54e44
JH		 638 for (;;) {
639 urb = usb_get_from_anchor(&acm->delayed);
640 if (!urb)
641 break;
642 wb = urb->context;
643 wb->use = 0;
644 usb_autopm_put_interface_async(acm->control);
10077d4a 645 }
89e54e44
JH		 646
647 usb_kill_urb(acm->ctrlurb);
648 for (i = 0; i < ACM_NW; i++)
649 usb_kill_urb(acm->wb[i].urb);
650 for (i = 0; i < acm->rx_buflimit; i++)
651 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 652}
653
654static void acm_tty_cleanup(struct tty_struct *tty)
655{
656 struct acm *acm = tty->driver_data;
657 dev_dbg(&acm->control->dev, "%s\n", __func__);
658 tty_port_put(&acm->port);
10077d4a
AC		 659}
660
661static void acm_tty_hangup(struct tty_struct *tty)
662{
663 struct acm *acm = tty->driver_data;
7fb57a01 664 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 665 tty_port_hangup(&acm->port);
10077d4a
AC		 666}
667
1da177e4
LT		 668static void acm_tty_close(struct tty_struct *tty, struct file *filp)
669{
670 struct acm *acm = tty->driver_data;
7fb57a01
HS		 671 dev_dbg(&acm->control->dev, "%s\n", __func__);
672 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 673}
674
6e47e069
AC		 675static int acm_tty_write(struct tty_struct *tty,
676 const unsigned char *buf, int count)
1da177e4
LT		 677{
678 struct acm *acm = tty->driver_data;
679 int stat;
884b600f
ON		 680 unsigned long flags;
681 int wbn;
682 struct acm_wb *wb;
683
1da177e4
LT		 684 if (!count)
685 return 0;
686
5e9e75f8 687 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 688
884b600f 689 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 690 wbn = acm_wb_alloc(acm);
691 if (wbn < 0) {
884b600f 692 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 693 return 0;
694 }
695 wb = &acm->wb[wbn];
1da177e4 696
71c2fb03
GKH		 697 if (!acm->dev) {
698 wb->use = 0;
699 spin_unlock_irqrestore(&acm->write_lock, flags);
700 return -ENODEV;
701 }
702
884b600f 703 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 704 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 705 memcpy(wb->buf, buf, count);
706 wb->len = count;
71c2fb03 707
183a4508
JH		 708 stat = usb_autopm_get_interface_async(acm->control);
709 if (stat) {
710 wb->use = 0;
711 spin_unlock_irqrestore(&acm->write_lock, flags);
712 return stat;
713 }
714
71c2fb03 715 if (acm->susp_count) {
a81cf979
ON		 716 if (acm->putbuffer) {
717 /* now to preserve order */
718 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
719 acm->putbuffer = NULL;
720 }
140cb81a 721 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 722 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 723 return count;
a81cf979
ON		 724 } else {
725 if (acm->putbuffer) {
726 /* at this point there is no good way to handle errors */
727 acm_start_wb(acm, acm->putbuffer);
728 acm->putbuffer = NULL;
729 }
71c2fb03 730 }
71c2fb03
GKH		 731
732 stat = acm_start_wb(acm, wb);
884b600f 733 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 734
6e47e069 735 if (stat < 0)
1da177e4 736 return stat;
1da177e4
LT		 737 return count;
738}
739
a81cf979
ON		 740static void acm_tty_flush_chars(struct tty_struct *tty)
741{
742 struct acm *acm = tty->driver_data;
743 struct acm_wb *cur = acm->putbuffer;
744 int err;
745 unsigned long flags;
746
2a14759a
ON		 747 if (!cur) /* nothing to do */
748 return;
749
a81cf979
ON		 750 acm->putbuffer = NULL;
751 err = usb_autopm_get_interface_async(acm->control);
752 spin_lock_irqsave(&acm->write_lock, flags);
753 if (err < 0) {
754 cur->use = 0;
2a14759a 755 acm->putbuffer = cur;
a81cf979
ON		 756 goto out;
757 }
758
759 if (acm->susp_count)
760 usb_anchor_urb(cur->urb, &acm->delayed);
761 else
762 acm_start_wb(acm, cur);
763out:
764 spin_unlock_irqrestore(&acm->write_lock, flags);
765 return;
766}
767
768static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
769{
770 struct acm *acm = tty->driver_data;
771 struct acm_wb *cur;
772 int wbn;
773 unsigned long flags;
774
775overflow:
776 cur = acm->putbuffer;
777 if (!cur) {
778 spin_lock_irqsave(&acm->write_lock, flags);
779 wbn = acm_wb_alloc(acm);
780 if (wbn >= 0) {
781 cur = &acm->wb[wbn];
782 acm->putbuffer = cur;
783 }
784 spin_unlock_irqrestore(&acm->write_lock, flags);
785 if (!cur)
786 return 0;
787 }
788
789 if (cur->len == acm->writesize) {
790 acm_tty_flush_chars(tty);
791 goto overflow;
792 }
793
794 cur->buf[cur->len++] = ch;
795 return 1;
796}
797
1da177e4
LT		 798static int acm_tty_write_room(struct tty_struct *tty)
799{
800 struct acm *acm = tty->driver_data;
884b600f
ON		 801 /*
802 * Do not let the line discipline to know that we have a reserve,
803 * or it might get too enthusiastic.
804 */
934da463 805 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 806}
807
808static int acm_tty_chars_in_buffer(struct tty_struct *tty)
809{
810 struct acm *acm = tty->driver_data;
7fb57a01
HS		 811 /*
812 * if the device was unplugged then any remaining characters fell out
813 * of the connector ;)
814 */
815 if (acm->disconnected)
23198fda 816 return 0;
884b600f
ON		 817 /*
818 * This is inaccurate (overcounts), but it works.
819 */
86478944 820 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 821}
822
823static void acm_tty_throttle(struct tty_struct *tty)
824{
825 struct acm *acm = tty->driver_data;
088c64f8 826
088c64f8
JH		 827 spin_lock_irq(&acm->read_lock);
828 acm->throttle_req = 1;
829 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 830}
831
832static void acm_tty_unthrottle(struct tty_struct *tty)
833{
834 struct acm *acm = tty->driver_data;
088c64f8
JH		 835 unsigned int was_throttled;
836
088c64f8
JH		 837 spin_lock_irq(&acm->read_lock);
838 was_throttled = acm->throttled;
839 acm->throttled = 0;
840 acm->throttle_req = 0;
841 spin_unlock_irq(&acm->read_lock);
842
843 if (was_throttled)
844 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 845}
846
9e98966c 847static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 848{
849 struct acm *acm = tty->driver_data;
9e98966c 850 int retval;
7fb57a01 851
9e98966c
AC		 852 retval = acm_send_break(acm, state ? 0xffff : 0);
853 if (retval < 0)
a5cc7ef9
JH		 854 dev_dbg(&acm->control->dev, "%s - send break failed\n",
855 __func__);
9e98966c 856 return retval;
1da177e4
LT		 857}
858
60b33c13 859static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 860{
861 struct acm *acm = tty->driver_data;
862
1da177e4
LT		 863 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
864 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
865 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
866 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
867 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
868 TIOCM_CTS;
869}
870
20b9d177 871static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 872 unsigned int set, unsigned int clear)
873{
874 struct acm *acm = tty->driver_data;
875 unsigned int newctrl;
876
1da177e4 877 newctrl = acm->ctrlout;
6e47e069
AC		 878 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
879 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
880 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
881 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 882
883 newctrl = (newctrl & ~clear) | set;
884
885 if (acm->ctrlout == newctrl)
886 return 0;
887 return acm_set_control(acm, acm->ctrlout = newctrl);
888}
889
18c75720
ON		 890static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
891{
892 struct serial_struct tmp;
893
894 if (!info)
895 return -EINVAL;
896
897 memset(&tmp, 0, sizeof(tmp));
898 tmp.flags = ASYNC_LOW_LATENCY;
899 tmp.xmit_fifo_size = acm->writesize;
900 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 901 tmp.close_delay = acm->port.close_delay / 10;
902 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
903 ASYNC_CLOSING_WAIT_NONE :
904 acm->port.closing_wait / 10;
18c75720
ON		 905
906 if (copy_to_user(info, &tmp, sizeof(tmp)))
907 return -EFAULT;
908 else
909 return 0;
910}
911
ba2d8ce9
DW		 912static int set_serial_info(struct acm *acm,
913 struct serial_struct __user *newinfo)
914{
915 struct serial_struct new_serial;
916 unsigned int closing_wait, close_delay;
917 int retval = 0;
918
919 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
920 return -EFAULT;
921
922 close_delay = new_serial.close_delay * 10;
923 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
924 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
925
926 mutex_lock(&acm->port.mutex);
927
928 if (!capable(CAP_SYS_ADMIN)) {
929 if ((close_delay != acm->port.close_delay) ||
930 (closing_wait != acm->port.closing_wait))
931 retval = -EPERM;
932 else
933 retval = -EOPNOTSUPP;
934 } else {
935 acm->port.close_delay = close_delay;
936 acm->port.closing_wait = closing_wait;
937 }
938
939 mutex_unlock(&acm->port.mutex);
940 return retval;
941}
942
5a6a62bd
ON		 943static int wait_serial_change(struct acm *acm, unsigned long arg)
944{
945 int rv = 0;
946 DECLARE_WAITQUEUE(wait, current);
947 struct async_icount old, new;
948
a092a16b 949 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD))
5a6a62bd
ON		 950 return -EINVAL;
951 do {
952 spin_lock_irq(&acm->read_lock);
953 old = acm->oldcount;
954 new = acm->iocount;
955 acm->oldcount = new;
956 spin_unlock_irq(&acm->read_lock);
957
958 if ((arg & TIOCM_DSR) &&
959 old.dsr != new.dsr)
960 break;
961 if ((arg & TIOCM_CD) &&
962 old.dcd != new.dcd)
963 break;
964 if ((arg & TIOCM_RI) &&
965 old.rng != new.rng)
966 break;
967
968 add_wait_queue(&acm->wioctl, &wait);
969 set_current_state(TASK_INTERRUPTIBLE);
970 schedule();
971 remove_wait_queue(&acm->wioctl, &wait);
972 if (acm->disconnected) {
973 if (arg & TIOCM_CD)
974 break;
975 else
976 rv = -ENODEV;
977 } else {
978 if (signal_pending(current))
979 rv = -ERESTARTSYS;
980 }
981 } while (!rv);
982
983
984
985 return rv;
986}
987
797ef137
ON		 988static int get_serial_usage(struct acm *acm,
989 struct serial_icounter_struct __user *count)
990{
991 struct serial_icounter_struct icount;
992 int rv = 0;
993
994 memset(&icount, 0, sizeof(icount));
995 icount.dsr = acm->iocount.dsr;
996 icount.rng = acm->iocount.rng;
997 icount.dcd = acm->iocount.dcd;
998 icount.frame = acm->iocount.frame;
999 icount.overrun = acm->iocount.overrun;
1000 icount.parity = acm->iocount.parity;
1001 icount.brk = acm->iocount.brk;
1002
1003 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
1004 rv = -EFAULT;
1005
1006 return rv;
1007}
1008
6caa76b7 1009static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 1010 unsigned int cmd, unsigned long arg)
1da177e4 1011{
18c75720
ON		 1012 struct acm *acm = tty->driver_data;
1013 int rv = -ENOIOCTLCMD;
1014
1015 switch (cmd) {
1016 case TIOCGSERIAL: /* gets serial port data */
1017 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 1018 break;
1019 case TIOCSSERIAL:
1020 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 1021 break;
5a6a62bd 1022 case TIOCMIWAIT:
8fdbeb26
ON		 1023 rv = usb_autopm_get_interface(acm->control);
1024 if (rv < 0) {
1025 rv = -EIO;
1026 break;
1027 }
5a6a62bd 1028 rv = wait_serial_change(acm, arg);
8fdbeb26 1029 usb_autopm_put_interface(acm->control);
5a6a62bd 1030 break;
797ef137
ON		 1031 case TIOCGICOUNT:
1032 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1033 break;
18c75720
ON		 1034 }
1035
1036 return rv;
1da177e4
LT		 1037}
1038
6e47e069
AC		 1039static void acm_tty_set_termios(struct tty_struct *tty,
1040 struct ktermios *termios_old)
1da177e4
LT		 1041{
1042 struct acm *acm = tty->driver_data;
adc8d746 1043 struct ktermios *termios = &tty->termios;
1da177e4
LT		 1044 struct usb_cdc_line_coding newline;
1045 int newctrl = acm->ctrlout;
1046
9b80fee1 1047 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 1048 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1049 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 1050 (termios->c_cflag & PARODD ? 1 : 2) +
1051 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 1052 switch (termios->c_cflag & CSIZE) {
1053 case CS5:
1054 newline.bDataBits = 5;
1055 break;
1056 case CS6:
1057 newline.bDataBits = 6;
1058 break;
1059 case CS7:
1060 newline.bDataBits = 7;
1061 break;
1062 case CS8:
1063 default:
1064 newline.bDataBits = 8;
1065 break;
1066 }
6e47e069 1067 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 1068 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1069
4473d054 1070 if (C_BAUD(tty) == B0) {
1da177e4
LT		 1071 newline.dwDTERate = acm->line.dwDTERate;
1072 newctrl &= ~ACM_CTRL_DTR;
4473d054 1073 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
6e47e069 1074 newctrl |= ACM_CTRL_DTR;
4473d054 1075 }
1da177e4
LT		 1076
1077 if (newctrl != acm->ctrlout)
1078 acm_set_control(acm, acm->ctrlout = newctrl);
1079
1080 if (memcmp(&acm->line, &newline, sizeof newline)) {
1081 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 1082 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1083 __func__,
1084 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 1085 newline.bCharFormat, newline.bParityType,
1086 newline.bDataBits);
1087 acm_set_line(acm, &acm->line);
1088 }
1089}
1090
7fb57a01 1091static const struct tty_port_operations acm_port_ops = {
0943d8ea 1092 .dtr_rts = acm_port_dtr_rts,
7fb57a01
HS		 1093 .shutdown = acm_port_shutdown,
1094 .activate = acm_port_activate,
1095 .destruct = acm_port_destruct,
1096};
1097
1da177e4
LT		 1098/*
1099 * USB probe and disconnect routines.
1100 */
1101
830f4021 1102/* Little helpers: write/read buffers free */
884b600f
ON		 1103static void acm_write_buffers_free(struct acm *acm)
1104{
1105 int i;
1106 struct acm_wb *wb;
a496c64f 1107 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1108
6e47e069 1109 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1110 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1111}
1112
830f4021
ON		 1113static void acm_read_buffers_free(struct acm *acm)
1114{
1115 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1116 int i;
830f4021 1117
dab54c9f 1118 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1119 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1120 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1121}
1122
884b600f
ON		 1123/* Little helper: write buffers allocate */
1124static int acm_write_buffers_alloc(struct acm *acm)
1125{
1126 int i;
1127 struct acm_wb *wb;
1128
86478944 1129 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1130 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1131 &wb->dmah);
1132 if (!wb->buf) {
1133 while (i != 0) {
1134 --i;
1135 --wb;
997ea58e 1136 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1137 wb->buf, wb->dmah);
1138 }
1139 return -ENOMEM;
1140 }
1141 }
1142 return 0;
1143}
1144
10077d4a
AC		 1145static int acm_probe(struct usb_interface *intf,
1146 const struct usb_device_id *id)
1da177e4
LT		 1147{
1148 struct usb_cdc_union_desc *union_header = NULL;
cb42b63d 1149 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
c6dbf554 1150 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1151 int buflen = intf->altsetting->extralen;
1152 struct usb_interface *control_interface;
1153 struct usb_interface *data_interface;
a2bfb4a3
ON		 1154 struct usb_endpoint_descriptor *epctrl = NULL;
1155 struct usb_endpoint_descriptor *epread = NULL;
1156 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4 1157 struct usb_device *usb_dev = interface_to_usbdev(intf);
cb42b63d 1158 struct usb_cdc_parsed_header h;
1da177e4
LT		 1159 struct acm *acm;
1160 int minor;
6e47e069 1161 int ctrlsize, readsize;
1da177e4 1162 u8 *buf;
cb42b63d
ON		 1163 int call_intf_num = -1;
1164 int data_intf_num = -1;
1da177e4 1165 unsigned long quirks;
86478944 1166 int num_rx_buf;
61a87adf 1167 int i;
a2bfb4a3 1168 int combined_interfaces = 0;
c93d8195
AK		 1169 struct device *tty_dev;
1170 int rv = -ENOMEM;
1da177e4 1171
86478944 1172 /* normal quirks */
1da177e4 1173 quirks = (unsigned long)id->driver_info;
16142655
DT		 1174
1175 if (quirks == IGNORE_DEVICE)
1176 return -ENODEV;
1177
86478944
ON		 1178 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1179
1180 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1181 if (quirks == NO_UNION_NORMAL) {
1182 data_interface = usb_ifnum_to_if(usb_dev, 1);
1183 control_interface = usb_ifnum_to_if(usb_dev, 0);
8835ba4a
ON		 1184 /* we would crash */
1185 if (!data_interface || !control_interface)
1186 return -ENODEV;
1da177e4
LT		 1187 goto skip_normal_probe;
1188 }
6e47e069 1189
1da177e4
LT		 1190 /* normal probing*/
1191 if (!buffer) {
9908a32e 1192 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1193 return -EINVAL;
1194 }
1195
1196 if (!buflen) {
577045c0
TG		 1197 if (intf->cur_altsetting->endpoint &&
1198 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1199 intf->cur_altsetting->endpoint->extra) {
1200 dev_dbg(&intf->dev,
1201 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1202 buflen = intf->cur_altsetting->endpoint->extralen;
1203 buffer = intf->cur_altsetting->endpoint->extra;
1204 } else {
9908a32e
GKH		 1205 dev_err(&intf->dev,
1206 "Zero length descriptor references\n");
1da177e4
LT		 1207 return -EINVAL;
1208 }
1209 }
1210
cb42b63d
ON		 1211 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1212 union_header = h.usb_cdc_union_desc;
1213 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1214 if (cmgmd)
1215 call_intf_num = cmgmd->bDataInterface;
1da177e4
LT		 1216
1217 if (!union_header) {
cb42b63d 1218 if (call_intf_num > 0) {
6e47e069 1219 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1 1220 /* quirks for Droids MuIn LCD */
cb42b63d 1221 if (quirks & NO_DATA_INTERFACE) {
fd5054c1 1222 data_interface = usb_ifnum_to_if(usb_dev, 0);
cb42b63d
ON		 1223 } else {
1224 data_intf_num = call_intf_num;
1225 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1226 }
1da177e4
LT		 1227 control_interface = intf;
1228 } else {
a2bfb4a3
ON		 1229 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1230 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1231 return -ENODEV;
1232 } else {
1233 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1234 combined_interfaces = 1;
1235 control_interface = data_interface = intf;
1236 goto look_for_collapsed_interface;
1237 }
1da177e4
LT		 1238 }
1239 } else {
cb42b63d 1240 data_intf_num = union_header->bSlaveInterface0;
1da177e4 1241 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
cb42b63d 1242 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
403dff4e
GKH		 1243 }
1244
1245 if (!control_interface || !data_interface) {
1246 dev_dbg(&intf->dev, "no interfaces\n");
1247 return -ENODEV;
1da177e4 1248 }
6e47e069 1249
cb42b63d 1250 if (data_intf_num != call_intf_num)
6e47e069 1251 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1252
a2bfb4a3
ON		 1253 if (control_interface == data_interface) {
1254 /* some broken devices designed for windows work this way */
1255 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1256 combined_interfaces = 1;
1257 /* a popular other OS doesn't use it */
1258 quirks |= NO_CAP_LINE;
1259 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1260 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1261 return -EINVAL;
1262 }
1263look_for_collapsed_interface:
1264 for (i = 0; i < 3; i++) {
1265 struct usb_endpoint_descriptor *ep;
1266 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1267
1268 if (usb_endpoint_is_int_in(ep))
1269 epctrl = ep;
1270 else if (usb_endpoint_is_bulk_out(ep))
1271 epwrite = ep;
1272 else if (usb_endpoint_is_bulk_in(ep))
1273 epread = ep;
1274 else
1275 return -EINVAL;
1276 }
1277 if (!epctrl || !epread || !epwrite)
1278 return -ENODEV;
1279 else
1280 goto made_compressed_probe;
1281 }
1282
1da177e4
LT		 1283skip_normal_probe:
1284
1285 /*workaround for switched interfaces */
6e47e069
AC		 1286 if (data_interface->cur_altsetting->desc.bInterfaceClass
1287 != CDC_DATA_INTERFACE_TYPE) {
1288 if (control_interface->cur_altsetting->desc.bInterfaceClass
1289 == CDC_DATA_INTERFACE_TYPE) {
6e47e069
AC		 1290 dev_dbg(&intf->dev,
1291 "Your device has switched interfaces.\n");
2cfef79d 1292 swap(control_interface, data_interface);
1da177e4
LT		 1293 } else {
1294 return -EINVAL;
1295 }
1296 }
74da5d68
AS		 1297
1298 /* Accept probe requests only for the control interface */
a2bfb4a3 1299 if (!combined_interfaces && intf != control_interface)
74da5d68 1300 return -ENODEV;
6e47e069 1301
a2bfb4a3
ON		 1302 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1303 /* valid in this context */
6e47e069 1304 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1305 return -EBUSY;
1306 }
1307
1308
99f347ca
SS		 1309 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1310 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1311 return -EINVAL;
1312
1313 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1314 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1315 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1316
1317
1318 /* workaround for switched endpoints */
45aea704 1319 if (!usb_endpoint_dir_in(epread)) {
1da177e4 1320 /* descriptors are swapped */
6e47e069
AC		 1321 dev_dbg(&intf->dev,
1322 "The data interface has switched endpoints\n");
2cfef79d 1323 swap(epread, epwrite);
1da177e4 1324 }
a2bfb4a3 1325made_compressed_probe:
a5cc7ef9 1326 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1327
6e47e069 1328 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
17136d49 1329 if (acm == NULL)
1da177e4 1330 goto alloc_fail;
1da177e4 1331
7fb57a01 1332 minor = acm_alloc_minor(acm);
6dd3587f
ON		 1333 if (minor < 0)
1334 goto alloc_fail1;
7fb57a01 1335
29cc8897
KM		 1336 ctrlsize = usb_endpoint_maxp(epctrl);
1337 readsize = usb_endpoint_maxp(epread) *
6e47e069 1338 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1339 acm->combined_interfaces = combined_interfaces;
29cc8897 1340 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1341 acm->control = control_interface;
1342 acm->data = data_interface;
1343 acm->minor = minor;
1344 acm->dev = usb_dev;
cb42b63d
ON		 1345 if (h.usb_cdc_acm_descriptor)
1346 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
a2bfb4a3
ON		 1347 if (quirks & NO_CAP_LINE)
1348 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1349 acm->ctrlsize = ctrlsize;
1350 acm->readsize = readsize;
86478944 1351 acm->rx_buflimit = num_rx_buf;
c4028958 1352 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1353 init_waitqueue_head(&acm->wioctl);
884b600f 1354 spin_lock_init(&acm->write_lock);
61a87adf 1355 spin_lock_init(&acm->read_lock);
1365baf7 1356 mutex_init(&acm->mutex);
cf7fdd57
ON		 1357 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1358 if (acm->is_int_ep)
1359 acm->bInterval = epread->bInterval;
739e0285
AC		 1360 tty_port_init(&acm->port);
1361 acm->port.ops = &acm_port_ops;
140cb81a 1362 init_usb_anchor(&acm->delayed);
2a8cdfde 1363 acm->quirks = quirks;
1da177e4 1364
997ea58e 1365 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
17136d49 1366 if (!buf)
1da177e4 1367 goto alloc_fail2;
1da177e4
LT		 1368 acm->ctrl_buffer = buf;
1369
17136d49 1370 if (acm_write_buffers_alloc(acm) < 0)
1da177e4 1371 goto alloc_fail4;
1da177e4
LT		 1372
1373 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1374 if (!acm->ctrlurb)
1da177e4 1375 goto alloc_fail5;
17136d49 1376
86478944 1377 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1378 struct acm_rb *rb = &(acm->read_buffers[i]);
1379 struct urb *urb;
61a87adf 1380
74f5e1ba
JH		 1381 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1382 &rb->dma);
17136d49 1383 if (!rb->base)
74f5e1ba 1384 goto alloc_fail6;
088c64f8
JH		 1385 rb->index = i;
1386 rb->instance = acm;
74f5e1ba 1387
088c64f8 1388 urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1389 if (!urb)
c2572b78 1390 goto alloc_fail6;
17136d49 1391
088c64f8
JH		 1392 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1393 urb->transfer_dma = rb->dma;
1394 if (acm->is_int_ep) {
1395 usb_fill_int_urb(urb, acm->dev,
add12505 1396 usb_rcvintpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1397 rb->base,
1398 acm->readsize,
1399 acm_read_bulk_callback, rb,
1400 acm->bInterval);
1401 } else {
1402 usb_fill_bulk_urb(urb, acm->dev,
add12505 1403 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1404 rb->base,
1405 acm->readsize,
1406 acm_read_bulk_callback, rb);
1407 }
61a87adf 1408
088c64f8
JH		 1409 acm->read_urbs[i] = urb;
1410 __set_bit(i, &acm->read_urbs_free);
61a87adf 1411 }
6e47e069 1412 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1413 struct acm_wb *snd = &(acm->wb[i]);
1414
6e47e069 1415 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1416 if (snd->urb == NULL)
74f5e1ba 1417 goto alloc_fail7;
e4cf3aa8 1418
5186ffee
AL		 1419 if (usb_endpoint_xfer_int(epwrite))
1420 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1421 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1422 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1423 else
1424 usb_fill_bulk_urb(snd->urb, usb_dev,
1425 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1426 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8 1427 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
ffdb1e36
LB		 1428 if (quirks & SEND_ZERO_PACKET)
1429 snd->urb->transfer_flags |= URB_ZERO_PACKET;
e4cf3aa8 1430 snd->instance = acm;
1da177e4
LT		 1431 }
1432
6e47e069 1433 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1434
1435 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1436 if (i < 0)
74f5e1ba 1437 goto alloc_fail7;
c4cabd28 1438
cb42b63d
ON		 1439 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1440 struct usb_cdc_country_functional_desc * cfd =
1441 h.usb_cdc_country_functional_desc;
1442
c4cabd28
ON		 1443 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1444 if (!acm->country_codes)
1445 goto skip_countries;
1446 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1447 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1448 cfd->bLength - 4);
c4cabd28
ON		 1449 acm->country_rel_date = cfd->iCountryCodeRelDate;
1450
1451 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1452 if (i < 0) {
1453 kfree(acm->country_codes);
e7c8e860
JL		 1454 acm->country_codes = NULL;
1455 acm->country_code_size = 0;
c4cabd28
ON		 1456 goto skip_countries;
1457 }
1458
6e47e069
AC		 1459 i = device_create_file(&intf->dev,
1460 &dev_attr_iCountryCodeRelDate);
c4cabd28 1461 if (i < 0) {
c2572b78 1462 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1463 kfree(acm->country_codes);
e7c8e860
JL		 1464 acm->country_codes = NULL;
1465 acm->country_code_size = 0;
c4cabd28
ON		 1466 goto skip_countries;
1467 }
1468 }
1469
1470skip_countries:
6e47e069 1471 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1472 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1473 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1474 /* works around buggy devices */
d102e78f 1475 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1476 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1477 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1478
1da177e4
LT		 1479 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1480
1da177e4
LT		 1481 acm->line.dwDTERate = cpu_to_le32(9600);
1482 acm->line.bDataBits = 8;
1483 acm_set_line(acm, &acm->line);
1484
1485 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1486 usb_set_intfdata(data_interface, acm);
1da177e4 1487
83ef344a 1488 usb_get_intf(control_interface);
c93d8195 1489 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1490 &control_interface->dev);
c93d8195
AK		 1491 if (IS_ERR(tty_dev)) {
1492 rv = PTR_ERR(tty_dev);
1493 goto alloc_fail8;
1494 }
1da177e4 1495
15bf722e
AS		 1496 if (quirks & CLEAR_HALT_CONDITIONS) {
1497 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1498 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1499 }
1500
c4cabd28 1501 return 0;
c93d8195
AK		 1502alloc_fail8:
1503 if (acm->country_codes) {
1504 device_remove_file(&acm->control->dev,
1505 &dev_attr_wCountryCodes);
1506 device_remove_file(&acm->control->dev,
1507 &dev_attr_iCountryCodeRelDate);
d908f847 1508 kfree(acm->country_codes);
c93d8195
AK		 1509 }
1510 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1511alloc_fail7:
c93d8195 1512 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1513 for (i = 0; i < ACM_NW; i++)
1514 usb_free_urb(acm->wb[i].urb);
c2572b78 1515alloc_fail6:
86478944 1516 for (i = 0; i < num_rx_buf; i++)
088c64f8 1517 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1518 acm_read_buffers_free(acm);
1da177e4
LT		 1519 usb_free_urb(acm->ctrlurb);
1520alloc_fail5:
884b600f 1521 acm_write_buffers_free(acm);
1da177e4 1522alloc_fail4:
997ea58e 1523 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1524alloc_fail2:
7fb57a01 1525 acm_release_minor(acm);
6dd3587f 1526alloc_fail1:
1da177e4
LT		 1527 kfree(acm);
1528alloc_fail:
c93d8195 1529 return rv;
1da177e4
LT		 1530}
1531
1365baf7
ON		 1532static void stop_data_traffic(struct acm *acm)
1533{
1534 int i;
a5cc7ef9
JH		 1535
1536 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1537
1365baf7 1538 usb_kill_urb(acm->ctrlurb);
6e47e069 1539 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1540 usb_kill_urb(acm->wb[i].urb);
1365baf7 1541 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1542 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1543
1544 cancel_work_sync(&acm->work);
1545}
1546
1da177e4
LT		 1547static void acm_disconnect(struct usb_interface *intf)
1548{
c4cabd28 1549 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1550 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1551 struct tty_struct *tty;
7fb57a01
HS		 1552 int i;
1553
1554 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1555
672c4e18
DB		 1556 /* sibling interface is already cleaning up */
1557 if (!acm)
86067eea 1558 return;
672c4e18 1559
7fb57a01
HS		 1560 mutex_lock(&acm->mutex);
1561 acm->disconnected = true;
6e47e069 1562 if (acm->country_codes) {
74da5d68
AS		 1563 device_remove_file(&acm->control->dev,
1564 &dev_attr_wCountryCodes);
1565 device_remove_file(&acm->control->dev,
1566 &dev_attr_iCountryCodeRelDate);
c4cabd28 1567 }
5a6a62bd 1568 wake_up_all(&acm->wioctl);
74da5d68 1569 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1570 usb_set_intfdata(acm->control, NULL);
1571 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1572 mutex_unlock(&acm->mutex);
1573
1574 tty = tty_port_tty_get(&acm->port);
1575 if (tty) {
1576 tty_vhangup(tty);
1577 tty_kref_put(tty);
1578 }
1da177e4 1579
1365baf7 1580 stop_data_traffic(acm);
1da177e4 1581
cb25505f
JH		 1582 tty_unregister_device(acm_tty_driver, acm->minor);
1583
7fb57a01
HS		 1584 usb_free_urb(acm->ctrlurb);
1585 for (i = 0; i < ACM_NW; i++)
1586 usb_free_urb(acm->wb[i].urb);
1587 for (i = 0; i < acm->rx_buflimit; i++)
1588 usb_free_urb(acm->read_urbs[i]);
884b600f 1589 acm_write_buffers_free(acm);
7fb57a01 1590 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1591 acm_read_buffers_free(acm);
1da177e4 1592
a2bfb4a3
ON		 1593 if (!acm->combined_interfaces)
1594 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1595 acm->data : acm->control);
1da177e4 1596
7fb57a01 1597 tty_port_put(&acm->port);
1da177e4
LT		 1598}
1599
35758589 1600#ifdef CONFIG_PM
1365baf7
ON		 1601static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1602{
1603 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1604 int cnt;
1605
bbf0cb3e 1606 spin_lock_irq(&acm->write_lock);
5b1b0b81 1607 if (PMSG_IS_AUTO(message)) {
5a345c20 1608 if (acm->transmitting) {
bbf0cb3e 1609 spin_unlock_irq(&acm->write_lock);
11ea859d 1610 return -EBUSY;
5a345c20 1611 }
11ea859d 1612 }
11ea859d 1613 cnt = acm->susp_count++;
bbf0cb3e 1614 spin_unlock_irq(&acm->write_lock);
1365baf7 1615
11ea859d 1616 if (cnt)
1365baf7 1617 return 0;
1365baf7 1618
ed797074 1619 stop_data_traffic(acm);
1365baf7 1620
1365baf7
ON		 1621 return 0;
1622}
1623
1624static int acm_resume(struct usb_interface *intf)
1625{
1626 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1627 struct urb *urb;
1365baf7
ON		 1628 int rv = 0;
1629
bbf0cb3e 1630 spin_lock_irq(&acm->write_lock);
11ea859d 1631
e144ed28
JH		 1632 if (--acm->susp_count)
1633 goto out;
1365baf7 1634
d41861ca 1635 if (tty_port_initialized(&acm->port)) {
e144ed28 1636 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1637
140cb81a
JH		 1638 for (;;) {
1639 urb = usb_get_from_anchor(&acm->delayed);
1640 if (!urb)
1641 break;
1642
1643 acm_start_wb(acm, urb->context);
97d35f95
ON		 1644 }
1645
1646 /*
1647 * delayed error checking because we must
1648 * do the write path at all cost
1649 */
1365baf7 1650 if (rv < 0)
e144ed28 1651 goto out;
1365baf7 1652
e144ed28 1653 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1654 }
e144ed28 1655out:
bbf0cb3e 1656 spin_unlock_irq(&acm->write_lock);
1365baf7 1657
1365baf7
ON		 1658 return rv;
1659}
35758589 1660
a91b0c50
FL		 1661static int acm_reset_resume(struct usb_interface *intf)
1662{
1663 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1664
d41861ca 1665 if (tty_port_initialized(&acm->port))
aa27a094 1666 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1667
a91b0c50
FL		 1668 return acm_resume(intf);
1669}
1670
35758589 1671#endif /* CONFIG_PM */
c1479a92
AT		 1672
1673#define NOKIA_PCSUITE_ACM_INFO(x) \
1674 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1675 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1676 USB_CDC_ACM_PROTO_VENDOR)
1677
4035e456
TG		 1678#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1679 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1680 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1681 USB_CDC_ACM_PROTO_VENDOR)
1682
1da177e4
LT		 1683/*
1684 * USB driver structure.
1685 */
1686
6ef4852b 1687static const struct usb_device_id acm_ids[] = {
1da177e4 1688 /* quirky and broken devices */
b20b1618
BG		 1689 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1690 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
3b59d16c
DC		 1691 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1692 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1693 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1695 },
b0e2a705
AA		 1696 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1698 },
0f9c7b4a
AL		 1699 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1701 },
8753e65e
MO		 1702 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1704 },
91a9c921
CM		 1705 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1707 },
7abcf20b
AC		 1708 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1709 .driver_info = SINGLE_RX_URB,
1710 },
86478944
ON		 1711 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1712 .driver_info = SINGLE_RX_URB, /* firmware bug */
1713 },
3dd2ae81
ON		 1714 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1715 .driver_info = SINGLE_RX_URB, /* firmware bug */
1716 },
9be8456c
ON		 1717 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1718 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1719 },
6149ed5e
IM		 1720 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1721 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1722 },
c8fd2c37
ES		 1723 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1724 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1725 },
c89c60e9
AC		 1726 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1727 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1728 },
cab98a0a
XK		 1729 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1730 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1731 },
2a8cdfde
JH		 1732 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1733 .driver_info = QUIRK_CONTROL_LINE_STATE, },
cf84a691 1734 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
155df65a
DT		 1735 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1736 },
6abff5dc
KH		 1737 /* Motorola H24 HSPA module: */
1738 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1739 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1740 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1741 },
1742 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1743 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1744 },
1745 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1746 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1747 },
1748 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1749 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1750 },
1751 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1752 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1753 },
1754 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1755 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1756 },
1757 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1758 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1759 },
6abff5dc 1760
c332b4e1
AR		 1761 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1762 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1763 data interface instead of
1764 communications interface.
1765 Maybe we should define a new
1766 quirk for this. */
1767 },
e7d491a1
JCR		 1768 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1769 .driver_info = NO_UNION_NORMAL,
1770 },
036915a7
DL		 1771 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1772 .driver_info = NO_UNION_NORMAL,
1773 },
1f17c502
KK		 1774 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1775 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1776 },
c3baa19b
RN		 1777 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1778 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1779 },
9be8456c 1780
15bf722e
AS		 1781 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1782 .driver_info = CLEAR_HALT_CONDITIONS,
1783 },
1784
c1479a92
AT		 1785 /* Nokia S60 phones expose two ACM channels. The first is
1786 * a modem and is picked up by the standard AT-command
1787 * information below. The second is 'vendor-specific' but
1788 * is treated as a serial device at the S60 end, so we want
1789 * to expose it on Linux too. */
1790 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1792 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1794 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1795 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1796 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1802 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1805 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1808 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1809 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1810 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1811 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1812 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1813 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1818 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1819 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1820 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1821 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1822 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1823 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1826 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1827 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1828 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1830 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1831 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1832 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1833 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1834 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1836 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1837 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1838 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1839 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1840 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1841 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1842 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1844 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1845 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1847 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1848
65e52f41
DP		 1849 /* Support for Owen devices */
1850 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1851
c1479a92
AT		 1852 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1853
fd5054c1
ES		 1854 /* Support for Droids MuIn LCD */
1855 { USB_DEVICE(0x04d8, 0x000b),
1856 .driver_info = NO_DATA_INTERFACE,
1857 },
1858
16142655
DT		 1859#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1860 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1861 .driver_info = IGNORE_DEVICE,
1862 },
1863 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1864 .driver_info = IGNORE_DEVICE,
1865 },
1866#endif
1867
e912e685
ON		 1868 /*Samsung phone in firmware update mode */
1869 { USB_DEVICE(0x04e8, 0x685d),
1870 .driver_info = IGNORE_DEVICE,
1871 },
1872
f33a7f72
JJ		 1873 /* Exclude Infineon Flash Loader utility */
1874 { USB_DEVICE(0x058b, 0x0041),
1875 .driver_info = IGNORE_DEVICE,
1876 },
1877
5b239f0a
PC		 1878 /* control interfaces without any protocol set */
1879 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1880 USB_CDC_PROTO_NONE) },
1881
1da177e4
LT		 1882 /* control interfaces with various AT-command sets */
1883 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1884 USB_CDC_ACM_PROTO_AT_V25TER) },
1885 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1886 USB_CDC_ACM_PROTO_AT_PCCA101) },
1887 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1888 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1889 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1890 USB_CDC_ACM_PROTO_AT_GSM) },
1891 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1892 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1893 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1894 USB_CDC_ACM_PROTO_AT_CDMA) },
1895
ffdb1e36
LB		 1896 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1897 .driver_info = SEND_ZERO_PACKET,
1898 },
1899
1da177e4
LT		 1900 { }
1901};
1902
6e47e069 1903MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1904
1905static struct usb_driver acm_driver = {
1da177e4
LT		 1906 .name = "cdc_acm",
1907 .probe = acm_probe,
1908 .disconnect = acm_disconnect,
35758589 1909#ifdef CONFIG_PM
1365baf7
ON		 1910 .suspend = acm_suspend,
1911 .resume = acm_resume,
a91b0c50 1912 .reset_resume = acm_reset_resume,
35758589 1913#endif
1da177e4 1914 .id_table = acm_ids,
35758589 1915#ifdef CONFIG_PM
1365baf7 1916 .supports_autosuspend = 1,
35758589 1917#endif
e1f12eb6 1918 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1919};
1920
1921/*
1922 * TTY driver structures.
1923 */
1924
b68e31d0 1925static const struct tty_operations acm_ops = {
7fb57a01 1926 .install = acm_tty_install,
1da177e4
LT		 1927 .open = acm_tty_open,
1928 .close = acm_tty_close,
7fb57a01 1929 .cleanup = acm_tty_cleanup,
10077d4a 1930 .hangup = acm_tty_hangup,
1da177e4 1931 .write = acm_tty_write,
a81cf979
ON		 1932 .put_char = acm_tty_put_char,
1933 .flush_chars = acm_tty_flush_chars,
1da177e4
LT		 1934 .write_room = acm_tty_write_room,
1935 .ioctl = acm_tty_ioctl,
1936 .throttle = acm_tty_throttle,
1937 .unthrottle = acm_tty_unthrottle,
1938 .chars_in_buffer = acm_tty_chars_in_buffer,
1939 .break_ctl = acm_tty_break_ctl,
1940 .set_termios = acm_tty_set_termios,
1941 .tiocmget = acm_tty_tiocmget,
1942 .tiocmset = acm_tty_tiocmset,
1943};
1944
1945/*
1946 * Init / exit.
1947 */
1948
1949static int __init acm_init(void)
1950{
1951 int retval;
1952 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1953 if (!acm_tty_driver)
1954 return -ENOMEM;
1da177e4
LT		 1955 acm_tty_driver->driver_name = "acm",
1956 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1957 acm_tty_driver->major = ACM_TTY_MAJOR,
1958 acm_tty_driver->minor_start = 0,
1959 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1960 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1961 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1962 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1963 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1964 HUPCL | CLOCAL;
1da177e4
LT		 1965 tty_set_operations(acm_tty_driver, &acm_ops);
1966
1967 retval = tty_register_driver(acm_tty_driver);
1968 if (retval) {
1969 put_tty_driver(acm_tty_driver);
1970 return retval;
1971 }
1972
1973 retval = usb_register(&acm_driver);
1974 if (retval) {
1975 tty_unregister_driver(acm_tty_driver);
1976 put_tty_driver(acm_tty_driver);
1977 return retval;
1978 }
1979
a2c7b935 1980 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1981
1982 return 0;
1983}
1984
1985static void __exit acm_exit(void)
1986{
1987 usb_deregister(&acm_driver);
1988 tty_unregister_driver(acm_tty_driver);
1989 put_tty_driver(acm_tty_driver);
91b72560 1990 idr_destroy(&acm_minors);
1da177e4
LT		 1991}
1992
1993module_init(acm_init);
1994module_exit(acm_exit);
1995
6e47e069
AC		 1996MODULE_AUTHOR(DRIVER_AUTHOR);
1997MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1998MODULE_LICENSE("GPL");
e766aeb8 1999MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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