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Merge remote-tracking branch 'usb/usb-next'
[deliverable/linux.git] / drivers / usb / class / cdc-acm.c
CommitLineData
1da177e4
LT		 1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
a2531293 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
1da177e4
LT		 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
61a87adf 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
088c64f8 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
1da177e4
LT		 11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
1da177e4
LT		 16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31#undef DEBUG
e5fbab51 32#undef VERBOSE_DEBUG
1da177e4
LT		 33
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/init.h>
37#include <linux/slab.h>
38#include <linux/tty.h>
7af25b4b 39#include <linux/serial.h>
1da177e4
LT		 40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
4186ecf8 43#include <linux/mutex.h>
10077d4a 44#include <linux/uaccess.h>
1da177e4 45#include <linux/usb.h>
a8c28f23 46#include <linux/usb/cdc.h>
1da177e4
LT		 47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
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
6cb4f4df 495 acm = acm_get_by_minor(tty->index);
7fb57a01
HS		 496 if (!acm)
497 return -ENODEV;
a5cc7ef9 498
f8a8c10f 499 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 500 if (retval)
501 goto error_init_termios;
10077d4a 502
1da177e4 503 tty->driver_data = acm;
1da177e4 504
7fb57a01
HS		 505 return 0;
506
507error_init_termios:
508 tty_port_put(&acm->port);
509 return retval;
510}
511
512static int acm_tty_open(struct tty_struct *tty, struct file *filp)
513{
514 struct acm *acm = tty->driver_data;
515
7fb57a01
HS		 516 return tty_port_open(&acm->port, tty, filp);
517}
518
0943d8ea
JH		 519static void acm_port_dtr_rts(struct tty_port *port, int raise)
520{
521 struct acm *acm = container_of(port, struct acm, port);
522 int val;
523 int res;
524
525 if (raise)
526 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
527 else
528 val = 0;
529
530 /* FIXME: add missing ctrlout locking throughout driver */
531 acm->ctrlout = val;
532
533 res = acm_set_control(acm, val);
534 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
535 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
536}
537
7fb57a01
HS		 538static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
539{
540 struct acm *acm = container_of(port, struct acm, port);
541 int retval = -ENODEV;
e4c36076 542 int i;
7fb57a01 543
1365baf7 544 mutex_lock(&acm->mutex);
7fb57a01
HS		 545 if (acm->disconnected)
546 goto disconnected;
547
548 retval = usb_autopm_get_interface(acm->control);
549 if (retval)
550 goto error_get_interface;
551
552 /*
553 * FIXME: Why do we need this? Allocating 64K of physically contiguous
554 * memory is really nasty...
555 */
556 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
557 acm->control->needs_remote_wakeup = 1;
1365baf7 558
1da177e4 559 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 560 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
561 if (retval) {
a5cc7ef9
JH		 562 dev_err(&acm->control->dev,
563 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 564 goto error_submit_urb;
1da177e4
LT		 565 }
566
24cb4502
JP		 567 acm_tty_set_termios(tty, NULL);
568
6c4707f3
OM		 569 /*
570 * Unthrottle device in case the TTY was closed while throttled.
571 */
572 spin_lock_irq(&acm->read_lock);
573 acm->throttled = 0;
574 acm->throttle_req = 0;
575 spin_unlock_irq(&acm->read_lock);
576
8727bf68
JH		 577 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
578 if (retval)
7fb57a01 579 goto error_submit_read_urbs;
2b626dc1 580
703df329
JH		 581 usb_autopm_put_interface(acm->control);
582
1365baf7 583 mutex_unlock(&acm->mutex);
1da177e4 584
7fb57a01
HS		 585 return 0;
586
587error_submit_read_urbs:
e4c36076
JH		 588 for (i = 0; i < acm->rx_buflimit; i++)
589 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 590 usb_kill_urb(acm->ctrlurb);
591error_submit_urb:
703df329 592 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 593error_get_interface:
594disconnected:
595 mutex_unlock(&acm->mutex);
8727bf68
JH		 596
597 return usb_translate_errors(retval);
1da177e4
LT		 598}
599
7fb57a01 600static void acm_port_destruct(struct tty_port *port)
83ef344a 601{
7fb57a01
HS		 602 struct acm *acm = container_of(port, struct acm, port);
603
7fb57a01 604 acm_release_minor(acm);
83ef344a 605 usb_put_intf(acm->control);
c4cabd28 606 kfree(acm->country_codes);
83ef344a 607 kfree(acm);
608}
609
7fb57a01 610static void acm_port_shutdown(struct tty_port *port)
10077d4a 611{
7fb57a01 612 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 613 struct urb *urb;
614 struct acm_wb *wb;
dab54c9f
JH		 615 int i;
616
b1d42efc
JH		 617 /*
618 * Need to grab write_lock to prevent race with resume, but no need to
619 * hold it due to the tty-port initialised flag.
620 */
621 spin_lock_irq(&acm->write_lock);
622 spin_unlock_irq(&acm->write_lock);
623
624 usb_autopm_get_interface_no_resume(acm->control);
625 acm->control->needs_remote_wakeup = 0;
626 usb_autopm_put_interface(acm->control);
627
89e54e44
JH		 628 for (;;) {
629 urb = usb_get_from_anchor(&acm->delayed);
630 if (!urb)
631 break;
632 wb = urb->context;
633 wb->use = 0;
634 usb_autopm_put_interface_async(acm->control);
10077d4a 635 }
89e54e44
JH		 636
637 usb_kill_urb(acm->ctrlurb);
638 for (i = 0; i < ACM_NW; i++)
639 usb_kill_urb(acm->wb[i].urb);
640 for (i = 0; i < acm->rx_buflimit; i++)
641 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 642}
643
644static void acm_tty_cleanup(struct tty_struct *tty)
645{
646 struct acm *acm = tty->driver_data;
ab57f861 647
7fb57a01 648 tty_port_put(&acm->port);
10077d4a
AC		 649}
650
651static void acm_tty_hangup(struct tty_struct *tty)
652{
653 struct acm *acm = tty->driver_data;
ab57f861 654
10077d4a 655 tty_port_hangup(&acm->port);
10077d4a
AC		 656}
657
1da177e4
LT		 658static void acm_tty_close(struct tty_struct *tty, struct file *filp)
659{
660 struct acm *acm = tty->driver_data;
ab57f861 661
7fb57a01 662 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 663}
664
6e47e069
AC		 665static int acm_tty_write(struct tty_struct *tty,
666 const unsigned char *buf, int count)
1da177e4
LT		 667{
668 struct acm *acm = tty->driver_data;
669 int stat;
884b600f
ON		 670 unsigned long flags;
671 int wbn;
672 struct acm_wb *wb;
673
1da177e4
LT		 674 if (!count)
675 return 0;
676
5e9e75f8 677 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 678
884b600f 679 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 680 wbn = acm_wb_alloc(acm);
681 if (wbn < 0) {
884b600f 682 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 683 return 0;
684 }
685 wb = &acm->wb[wbn];
1da177e4 686
71c2fb03
GKH		 687 if (!acm->dev) {
688 wb->use = 0;
689 spin_unlock_irqrestore(&acm->write_lock, flags);
690 return -ENODEV;
691 }
692
884b600f 693 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 694 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 695 memcpy(wb->buf, buf, count);
696 wb->len = count;
71c2fb03 697
183a4508
JH		 698 stat = usb_autopm_get_interface_async(acm->control);
699 if (stat) {
700 wb->use = 0;
701 spin_unlock_irqrestore(&acm->write_lock, flags);
702 return stat;
703 }
704
71c2fb03 705 if (acm->susp_count) {
a81cf979
ON		 706 if (acm->putbuffer) {
707 /* now to preserve order */
708 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
709 acm->putbuffer = NULL;
710 }
140cb81a 711 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 712 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 713 return count;
a81cf979
ON		 714 } else {
715 if (acm->putbuffer) {
716 /* at this point there is no good way to handle errors */
717 acm_start_wb(acm, acm->putbuffer);
718 acm->putbuffer = NULL;
719 }
71c2fb03 720 }
71c2fb03
GKH		 721
722 stat = acm_start_wb(acm, wb);
884b600f 723 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 724
6e47e069 725 if (stat < 0)
1da177e4 726 return stat;
1da177e4
LT		 727 return count;
728}
729
a81cf979
ON		 730static void acm_tty_flush_chars(struct tty_struct *tty)
731{
732 struct acm *acm = tty->driver_data;
733 struct acm_wb *cur = acm->putbuffer;
734 int err;
735 unsigned long flags;
736
2a14759a
ON		 737 if (!cur) /* nothing to do */
738 return;
739
a81cf979
ON		 740 acm->putbuffer = NULL;
741 err = usb_autopm_get_interface_async(acm->control);
742 spin_lock_irqsave(&acm->write_lock, flags);
743 if (err < 0) {
744 cur->use = 0;
2a14759a 745 acm->putbuffer = cur;
a81cf979
ON		 746 goto out;
747 }
748
749 if (acm->susp_count)
750 usb_anchor_urb(cur->urb, &acm->delayed);
751 else
752 acm_start_wb(acm, cur);
753out:
754 spin_unlock_irqrestore(&acm->write_lock, flags);
755 return;
756}
757
758static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
759{
760 struct acm *acm = tty->driver_data;
761 struct acm_wb *cur;
762 int wbn;
763 unsigned long flags;
764
765overflow:
766 cur = acm->putbuffer;
767 if (!cur) {
768 spin_lock_irqsave(&acm->write_lock, flags);
769 wbn = acm_wb_alloc(acm);
770 if (wbn >= 0) {
771 cur = &acm->wb[wbn];
772 acm->putbuffer = cur;
773 }
774 spin_unlock_irqrestore(&acm->write_lock, flags);
775 if (!cur)
776 return 0;
777 }
778
779 if (cur->len == acm->writesize) {
780 acm_tty_flush_chars(tty);
781 goto overflow;
782 }
783
784 cur->buf[cur->len++] = ch;
785 return 1;
786}
787
1da177e4
LT		 788static int acm_tty_write_room(struct tty_struct *tty)
789{
790 struct acm *acm = tty->driver_data;
884b600f
ON		 791 /*
792 * Do not let the line discipline to know that we have a reserve,
793 * or it might get too enthusiastic.
794 */
934da463 795 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 796}
797
798static int acm_tty_chars_in_buffer(struct tty_struct *tty)
799{
800 struct acm *acm = tty->driver_data;
7fb57a01
HS		 801 /*
802 * if the device was unplugged then any remaining characters fell out
803 * of the connector ;)
804 */
805 if (acm->disconnected)
23198fda 806 return 0;
884b600f
ON		 807 /*
808 * This is inaccurate (overcounts), but it works.
809 */
86478944 810 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 811}
812
813static void acm_tty_throttle(struct tty_struct *tty)
814{
815 struct acm *acm = tty->driver_data;
088c64f8 816
088c64f8
JH		 817 spin_lock_irq(&acm->read_lock);
818 acm->throttle_req = 1;
819 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 820}
821
822static void acm_tty_unthrottle(struct tty_struct *tty)
823{
824 struct acm *acm = tty->driver_data;
088c64f8
JH		 825 unsigned int was_throttled;
826
088c64f8
JH		 827 spin_lock_irq(&acm->read_lock);
828 was_throttled = acm->throttled;
829 acm->throttled = 0;
830 acm->throttle_req = 0;
831 spin_unlock_irq(&acm->read_lock);
832
833 if (was_throttled)
834 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 835}
836
9e98966c 837static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 838{
839 struct acm *acm = tty->driver_data;
9e98966c 840 int retval;
7fb57a01 841
9e98966c
AC		 842 retval = acm_send_break(acm, state ? 0xffff : 0);
843 if (retval < 0)
a5cc7ef9
JH		 844 dev_dbg(&acm->control->dev, "%s - send break failed\n",
845 __func__);
9e98966c 846 return retval;
1da177e4
LT		 847}
848
60b33c13 849static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 850{
851 struct acm *acm = tty->driver_data;
852
1da177e4
LT		 853 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
854 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
855 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
856 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
857 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
858 TIOCM_CTS;
859}
860
20b9d177 861static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 862 unsigned int set, unsigned int clear)
863{
864 struct acm *acm = tty->driver_data;
865 unsigned int newctrl;
866
1da177e4 867 newctrl = acm->ctrlout;
6e47e069
AC		 868 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
869 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
870 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
871 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 872
873 newctrl = (newctrl & ~clear) | set;
874
875 if (acm->ctrlout == newctrl)
876 return 0;
877 return acm_set_control(acm, acm->ctrlout = newctrl);
878}
879
18c75720
ON		 880static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
881{
882 struct serial_struct tmp;
883
884 if (!info)
885 return -EINVAL;
886
887 memset(&tmp, 0, sizeof(tmp));
888 tmp.flags = ASYNC_LOW_LATENCY;
889 tmp.xmit_fifo_size = acm->writesize;
890 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 891 tmp.close_delay = acm->port.close_delay / 10;
892 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
893 ASYNC_CLOSING_WAIT_NONE :
894 acm->port.closing_wait / 10;
18c75720
ON		 895
896 if (copy_to_user(info, &tmp, sizeof(tmp)))
897 return -EFAULT;
898 else
899 return 0;
900}
901
ba2d8ce9
DW		 902static int set_serial_info(struct acm *acm,
903 struct serial_struct __user *newinfo)
904{
905 struct serial_struct new_serial;
906 unsigned int closing_wait, close_delay;
907 int retval = 0;
908
909 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
910 return -EFAULT;
911
912 close_delay = new_serial.close_delay * 10;
913 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
914 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
915
916 mutex_lock(&acm->port.mutex);
917
918 if (!capable(CAP_SYS_ADMIN)) {
919 if ((close_delay != acm->port.close_delay) ||
920 (closing_wait != acm->port.closing_wait))
921 retval = -EPERM;
922 else
923 retval = -EOPNOTSUPP;
924 } else {
925 acm->port.close_delay = close_delay;
926 acm->port.closing_wait = closing_wait;
927 }
928
929 mutex_unlock(&acm->port.mutex);
930 return retval;
931}
932
5a6a62bd
ON		 933static int wait_serial_change(struct acm *acm, unsigned long arg)
934{
935 int rv = 0;
936 DECLARE_WAITQUEUE(wait, current);
937 struct async_icount old, new;
938
a092a16b 939 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD))
5a6a62bd
ON		 940 return -EINVAL;
941 do {
942 spin_lock_irq(&acm->read_lock);
943 old = acm->oldcount;
944 new = acm->iocount;
945 acm->oldcount = new;
946 spin_unlock_irq(&acm->read_lock);
947
948 if ((arg & TIOCM_DSR) &&
949 old.dsr != new.dsr)
950 break;
951 if ((arg & TIOCM_CD) &&
952 old.dcd != new.dcd)
953 break;
954 if ((arg & TIOCM_RI) &&
955 old.rng != new.rng)
956 break;
957
958 add_wait_queue(&acm->wioctl, &wait);
959 set_current_state(TASK_INTERRUPTIBLE);
960 schedule();
961 remove_wait_queue(&acm->wioctl, &wait);
962 if (acm->disconnected) {
963 if (arg & TIOCM_CD)
964 break;
965 else
966 rv = -ENODEV;
967 } else {
968 if (signal_pending(current))
969 rv = -ERESTARTSYS;
970 }
971 } while (!rv);
972
973
974
975 return rv;
976}
977
797ef137
ON		 978static int get_serial_usage(struct acm *acm,
979 struct serial_icounter_struct __user *count)
980{
981 struct serial_icounter_struct icount;
982 int rv = 0;
983
984 memset(&icount, 0, sizeof(icount));
985 icount.dsr = acm->iocount.dsr;
986 icount.rng = acm->iocount.rng;
987 icount.dcd = acm->iocount.dcd;
988 icount.frame = acm->iocount.frame;
989 icount.overrun = acm->iocount.overrun;
990 icount.parity = acm->iocount.parity;
991 icount.brk = acm->iocount.brk;
992
993 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
994 rv = -EFAULT;
995
996 return rv;
997}
998
6caa76b7 999static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 1000 unsigned int cmd, unsigned long arg)
1da177e4 1001{
18c75720
ON		 1002 struct acm *acm = tty->driver_data;
1003 int rv = -ENOIOCTLCMD;
1004
1005 switch (cmd) {
1006 case TIOCGSERIAL: /* gets serial port data */
1007 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 1008 break;
1009 case TIOCSSERIAL:
1010 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 1011 break;
5a6a62bd 1012 case TIOCMIWAIT:
8fdbeb26
ON		 1013 rv = usb_autopm_get_interface(acm->control);
1014 if (rv < 0) {
1015 rv = -EIO;
1016 break;
1017 }
5a6a62bd 1018 rv = wait_serial_change(acm, arg);
8fdbeb26 1019 usb_autopm_put_interface(acm->control);
5a6a62bd 1020 break;
797ef137
ON		 1021 case TIOCGICOUNT:
1022 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1023 break;
18c75720
ON		 1024 }
1025
1026 return rv;
1da177e4
LT		 1027}
1028
6e47e069
AC		 1029static void acm_tty_set_termios(struct tty_struct *tty,
1030 struct ktermios *termios_old)
1da177e4
LT		 1031{
1032 struct acm *acm = tty->driver_data;
adc8d746 1033 struct ktermios *termios = &tty->termios;
1da177e4
LT		 1034 struct usb_cdc_line_coding newline;
1035 int newctrl = acm->ctrlout;
1036
9b80fee1 1037 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 1038 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1039 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 1040 (termios->c_cflag & PARODD ? 1 : 2) +
1041 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 1042 switch (termios->c_cflag & CSIZE) {
1043 case CS5:
1044 newline.bDataBits = 5;
1045 break;
1046 case CS6:
1047 newline.bDataBits = 6;
1048 break;
1049 case CS7:
1050 newline.bDataBits = 7;
1051 break;
1052 case CS8:
1053 default:
1054 newline.bDataBits = 8;
1055 break;
1056 }
6e47e069 1057 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 1058 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1059
4473d054 1060 if (C_BAUD(tty) == B0) {
1da177e4
LT		 1061 newline.dwDTERate = acm->line.dwDTERate;
1062 newctrl &= ~ACM_CTRL_DTR;
4473d054 1063 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
6e47e069 1064 newctrl |= ACM_CTRL_DTR;
4473d054 1065 }
1da177e4
LT		 1066
1067 if (newctrl != acm->ctrlout)
1068 acm_set_control(acm, acm->ctrlout = newctrl);
1069
1070 if (memcmp(&acm->line, &newline, sizeof newline)) {
1071 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 1072 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1073 __func__,
1074 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 1075 newline.bCharFormat, newline.bParityType,
1076 newline.bDataBits);
1077 acm_set_line(acm, &acm->line);
1078 }
1079}
1080
7fb57a01 1081static const struct tty_port_operations acm_port_ops = {
0943d8ea 1082 .dtr_rts = acm_port_dtr_rts,
7fb57a01
HS		 1083 .shutdown = acm_port_shutdown,
1084 .activate = acm_port_activate,
1085 .destruct = acm_port_destruct,
1086};
1087
1da177e4
LT		 1088/*
1089 * USB probe and disconnect routines.
1090 */
1091
830f4021 1092/* Little helpers: write/read buffers free */
884b600f
ON		 1093static void acm_write_buffers_free(struct acm *acm)
1094{
1095 int i;
1096 struct acm_wb *wb;
a496c64f 1097 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1098
6e47e069 1099 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1100 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1101}
1102
830f4021
ON		 1103static void acm_read_buffers_free(struct acm *acm)
1104{
1105 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1106 int i;
830f4021 1107
dab54c9f 1108 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1109 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1110 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1111}
1112
884b600f
ON		 1113/* Little helper: write buffers allocate */
1114static int acm_write_buffers_alloc(struct acm *acm)
1115{
1116 int i;
1117 struct acm_wb *wb;
1118
86478944 1119 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1120 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1121 &wb->dmah);
1122 if (!wb->buf) {
1123 while (i != 0) {
1124 --i;
1125 --wb;
997ea58e 1126 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1127 wb->buf, wb->dmah);
1128 }
1129 return -ENOMEM;
1130 }
1131 }
1132 return 0;
1133}
1134
10077d4a
AC		 1135static int acm_probe(struct usb_interface *intf,
1136 const struct usb_device_id *id)
1da177e4
LT		 1137{
1138 struct usb_cdc_union_desc *union_header = NULL;
cb42b63d 1139 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
c6dbf554 1140 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1141 int buflen = intf->altsetting->extralen;
1142 struct usb_interface *control_interface;
1143 struct usb_interface *data_interface;
a2bfb4a3
ON		 1144 struct usb_endpoint_descriptor *epctrl = NULL;
1145 struct usb_endpoint_descriptor *epread = NULL;
1146 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4 1147 struct usb_device *usb_dev = interface_to_usbdev(intf);
cb42b63d 1148 struct usb_cdc_parsed_header h;
1da177e4
LT		 1149 struct acm *acm;
1150 int minor;
6e47e069 1151 int ctrlsize, readsize;
1da177e4 1152 u8 *buf;
cb42b63d
ON		 1153 int call_intf_num = -1;
1154 int data_intf_num = -1;
1da177e4 1155 unsigned long quirks;
86478944 1156 int num_rx_buf;
61a87adf 1157 int i;
a2bfb4a3 1158 int combined_interfaces = 0;
c93d8195
AK		 1159 struct device *tty_dev;
1160 int rv = -ENOMEM;
1da177e4 1161
86478944 1162 /* normal quirks */
1da177e4 1163 quirks = (unsigned long)id->driver_info;
16142655
DT		 1164
1165 if (quirks == IGNORE_DEVICE)
1166 return -ENODEV;
1167
86478944
ON		 1168 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1169
1170 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1171 if (quirks == NO_UNION_NORMAL) {
1172 data_interface = usb_ifnum_to_if(usb_dev, 1);
1173 control_interface = usb_ifnum_to_if(usb_dev, 0);
8835ba4a
ON		 1174 /* we would crash */
1175 if (!data_interface || !control_interface)
1176 return -ENODEV;
1da177e4
LT		 1177 goto skip_normal_probe;
1178 }
6e47e069 1179
1da177e4
LT		 1180 /* normal probing*/
1181 if (!buffer) {
9908a32e 1182 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1183 return -EINVAL;
1184 }
1185
1186 if (!buflen) {
577045c0
TG		 1187 if (intf->cur_altsetting->endpoint &&
1188 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1189 intf->cur_altsetting->endpoint->extra) {
1190 dev_dbg(&intf->dev,
1191 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1192 buflen = intf->cur_altsetting->endpoint->extralen;
1193 buffer = intf->cur_altsetting->endpoint->extra;
1194 } else {
9908a32e
GKH		 1195 dev_err(&intf->dev,
1196 "Zero length descriptor references\n");
1da177e4
LT		 1197 return -EINVAL;
1198 }
1199 }
1200
cb42b63d
ON		 1201 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1202 union_header = h.usb_cdc_union_desc;
1203 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1204 if (cmgmd)
1205 call_intf_num = cmgmd->bDataInterface;
1da177e4
LT		 1206
1207 if (!union_header) {
cb42b63d 1208 if (call_intf_num > 0) {
6e47e069 1209 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1 1210 /* quirks for Droids MuIn LCD */
cb42b63d 1211 if (quirks & NO_DATA_INTERFACE) {
fd5054c1 1212 data_interface = usb_ifnum_to_if(usb_dev, 0);
cb42b63d
ON		 1213 } else {
1214 data_intf_num = call_intf_num;
1215 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1216 }
1da177e4
LT		 1217 control_interface = intf;
1218 } else {
a2bfb4a3
ON		 1219 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1220 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1221 return -ENODEV;
1222 } else {
1223 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1224 combined_interfaces = 1;
1225 control_interface = data_interface = intf;
1226 goto look_for_collapsed_interface;
1227 }
1da177e4
LT		 1228 }
1229 } else {
cb42b63d 1230 data_intf_num = union_header->bSlaveInterface0;
1da177e4 1231 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
cb42b63d 1232 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
403dff4e
GKH		 1233 }
1234
1235 if (!control_interface || !data_interface) {
1236 dev_dbg(&intf->dev, "no interfaces\n");
1237 return -ENODEV;
1da177e4 1238 }
6e47e069 1239
cb42b63d 1240 if (data_intf_num != call_intf_num)
6e47e069 1241 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1242
a2bfb4a3
ON		 1243 if (control_interface == data_interface) {
1244 /* some broken devices designed for windows work this way */
1245 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1246 combined_interfaces = 1;
1247 /* a popular other OS doesn't use it */
1248 quirks |= NO_CAP_LINE;
1249 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1250 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1251 return -EINVAL;
1252 }
1253look_for_collapsed_interface:
1254 for (i = 0; i < 3; i++) {
1255 struct usb_endpoint_descriptor *ep;
1256 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1257
1258 if (usb_endpoint_is_int_in(ep))
1259 epctrl = ep;
1260 else if (usb_endpoint_is_bulk_out(ep))
1261 epwrite = ep;
1262 else if (usb_endpoint_is_bulk_in(ep))
1263 epread = ep;
1264 else
1265 return -EINVAL;
1266 }
1267 if (!epctrl || !epread || !epwrite)
1268 return -ENODEV;
1269 else
1270 goto made_compressed_probe;
1271 }
1272
1da177e4
LT		 1273skip_normal_probe:
1274
1275 /*workaround for switched interfaces */
6e47e069
AC		 1276 if (data_interface->cur_altsetting->desc.bInterfaceClass
1277 != CDC_DATA_INTERFACE_TYPE) {
1278 if (control_interface->cur_altsetting->desc.bInterfaceClass
1279 == CDC_DATA_INTERFACE_TYPE) {
6e47e069
AC		 1280 dev_dbg(&intf->dev,
1281 "Your device has switched interfaces.\n");
2cfef79d 1282 swap(control_interface, data_interface);
1da177e4
LT		 1283 } else {
1284 return -EINVAL;
1285 }
1286 }
74da5d68
AS		 1287
1288 /* Accept probe requests only for the control interface */
a2bfb4a3 1289 if (!combined_interfaces && intf != control_interface)
74da5d68 1290 return -ENODEV;
6e47e069 1291
a2bfb4a3
ON		 1292 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1293 /* valid in this context */
6e47e069 1294 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1295 return -EBUSY;
1296 }
1297
1298
99f347ca
SS		 1299 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1300 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1301 return -EINVAL;
1302
1303 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1304 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1305 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1306
1307
1308 /* workaround for switched endpoints */
45aea704 1309 if (!usb_endpoint_dir_in(epread)) {
1da177e4 1310 /* descriptors are swapped */
6e47e069
AC		 1311 dev_dbg(&intf->dev,
1312 "The data interface has switched endpoints\n");
2cfef79d 1313 swap(epread, epwrite);
1da177e4 1314 }
a2bfb4a3 1315made_compressed_probe:
a5cc7ef9 1316 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1317
6e47e069 1318 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
17136d49 1319 if (acm == NULL)
1da177e4 1320 goto alloc_fail;
1da177e4 1321
7fb57a01 1322 minor = acm_alloc_minor(acm);
6dd3587f
ON		 1323 if (minor < 0)
1324 goto alloc_fail1;
7fb57a01 1325
29cc8897
KM		 1326 ctrlsize = usb_endpoint_maxp(epctrl);
1327 readsize = usb_endpoint_maxp(epread) *
6e47e069 1328 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1329 acm->combined_interfaces = combined_interfaces;
29cc8897 1330 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1331 acm->control = control_interface;
1332 acm->data = data_interface;
1333 acm->minor = minor;
1334 acm->dev = usb_dev;
cb42b63d
ON		 1335 if (h.usb_cdc_acm_descriptor)
1336 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
a2bfb4a3
ON		 1337 if (quirks & NO_CAP_LINE)
1338 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1339 acm->ctrlsize = ctrlsize;
1340 acm->readsize = readsize;
86478944 1341 acm->rx_buflimit = num_rx_buf;
c4028958 1342 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1343 init_waitqueue_head(&acm->wioctl);
884b600f 1344 spin_lock_init(&acm->write_lock);
61a87adf 1345 spin_lock_init(&acm->read_lock);
1365baf7 1346 mutex_init(&acm->mutex);
cf7fdd57
ON		 1347 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1348 if (acm->is_int_ep)
1349 acm->bInterval = epread->bInterval;
739e0285
AC		 1350 tty_port_init(&acm->port);
1351 acm->port.ops = &acm_port_ops;
140cb81a 1352 init_usb_anchor(&acm->delayed);
2a8cdfde 1353 acm->quirks = quirks;
1da177e4 1354
997ea58e 1355 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
17136d49 1356 if (!buf)
1da177e4 1357 goto alloc_fail2;
1da177e4
LT		 1358 acm->ctrl_buffer = buf;
1359
17136d49 1360 if (acm_write_buffers_alloc(acm) < 0)
1da177e4 1361 goto alloc_fail4;
1da177e4
LT		 1362
1363 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1364 if (!acm->ctrlurb)
1da177e4 1365 goto alloc_fail5;
17136d49 1366
86478944 1367 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1368 struct acm_rb *rb = &(acm->read_buffers[i]);
1369 struct urb *urb;
61a87adf 1370
74f5e1ba
JH		 1371 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1372 &rb->dma);
17136d49 1373 if (!rb->base)
74f5e1ba 1374 goto alloc_fail6;
088c64f8
JH		 1375 rb->index = i;
1376 rb->instance = acm;
74f5e1ba 1377
088c64f8 1378 urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1379 if (!urb)
c2572b78 1380 goto alloc_fail6;
17136d49 1381
088c64f8
JH		 1382 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1383 urb->transfer_dma = rb->dma;
1384 if (acm->is_int_ep) {
1385 usb_fill_int_urb(urb, acm->dev,
add12505 1386 usb_rcvintpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1387 rb->base,
1388 acm->readsize,
1389 acm_read_bulk_callback, rb,
1390 acm->bInterval);
1391 } else {
1392 usb_fill_bulk_urb(urb, acm->dev,
add12505 1393 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1394 rb->base,
1395 acm->readsize,
1396 acm_read_bulk_callback, rb);
1397 }
61a87adf 1398
088c64f8
JH		 1399 acm->read_urbs[i] = urb;
1400 __set_bit(i, &acm->read_urbs_free);
61a87adf 1401 }
6e47e069 1402 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1403 struct acm_wb *snd = &(acm->wb[i]);
1404
6e47e069 1405 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1406 if (snd->urb == NULL)
74f5e1ba 1407 goto alloc_fail7;
e4cf3aa8 1408
5186ffee
AL		 1409 if (usb_endpoint_xfer_int(epwrite))
1410 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1411 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1412 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1413 else
1414 usb_fill_bulk_urb(snd->urb, usb_dev,
1415 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1416 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8 1417 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
ffdb1e36
LB		 1418 if (quirks & SEND_ZERO_PACKET)
1419 snd->urb->transfer_flags |= URB_ZERO_PACKET;
e4cf3aa8 1420 snd->instance = acm;
1da177e4
LT		 1421 }
1422
6e47e069 1423 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1424
1425 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1426 if (i < 0)
74f5e1ba 1427 goto alloc_fail7;
c4cabd28 1428
cb42b63d
ON		 1429 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1430 struct usb_cdc_country_functional_desc * cfd =
1431 h.usb_cdc_country_functional_desc;
1432
c4cabd28
ON		 1433 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1434 if (!acm->country_codes)
1435 goto skip_countries;
1436 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1437 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1438 cfd->bLength - 4);
c4cabd28
ON		 1439 acm->country_rel_date = cfd->iCountryCodeRelDate;
1440
1441 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1442 if (i < 0) {
1443 kfree(acm->country_codes);
e7c8e860
JL		 1444 acm->country_codes = NULL;
1445 acm->country_code_size = 0;
c4cabd28
ON		 1446 goto skip_countries;
1447 }
1448
6e47e069
AC		 1449 i = device_create_file(&intf->dev,
1450 &dev_attr_iCountryCodeRelDate);
c4cabd28 1451 if (i < 0) {
c2572b78 1452 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 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 }
1459
1460skip_countries:
6e47e069 1461 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1462 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1463 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1464 /* works around buggy devices */
d102e78f 1465 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1466 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1467 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1468
1da177e4
LT		 1469 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1470
1da177e4
LT		 1471 acm->line.dwDTERate = cpu_to_le32(9600);
1472 acm->line.bDataBits = 8;
1473 acm_set_line(acm, &acm->line);
1474
1475 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1476 usb_set_intfdata(data_interface, acm);
1da177e4 1477
83ef344a 1478 usb_get_intf(control_interface);
c93d8195 1479 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1480 &control_interface->dev);
c93d8195
AK		 1481 if (IS_ERR(tty_dev)) {
1482 rv = PTR_ERR(tty_dev);
1483 goto alloc_fail8;
1484 }
1da177e4 1485
15bf722e
AS		 1486 if (quirks & CLEAR_HALT_CONDITIONS) {
1487 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1488 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1489 }
1490
c4cabd28 1491 return 0;
c93d8195
AK		 1492alloc_fail8:
1493 if (acm->country_codes) {
1494 device_remove_file(&acm->control->dev,
1495 &dev_attr_wCountryCodes);
1496 device_remove_file(&acm->control->dev,
1497 &dev_attr_iCountryCodeRelDate);
d908f847 1498 kfree(acm->country_codes);
c93d8195
AK		 1499 }
1500 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1501alloc_fail7:
c93d8195 1502 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1503 for (i = 0; i < ACM_NW; i++)
1504 usb_free_urb(acm->wb[i].urb);
c2572b78 1505alloc_fail6:
86478944 1506 for (i = 0; i < num_rx_buf; i++)
088c64f8 1507 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1508 acm_read_buffers_free(acm);
1da177e4
LT		 1509 usb_free_urb(acm->ctrlurb);
1510alloc_fail5:
884b600f 1511 acm_write_buffers_free(acm);
1da177e4 1512alloc_fail4:
997ea58e 1513 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1514alloc_fail2:
7fb57a01 1515 acm_release_minor(acm);
6dd3587f 1516alloc_fail1:
1da177e4
LT		 1517 kfree(acm);
1518alloc_fail:
c93d8195 1519 return rv;
1da177e4
LT		 1520}
1521
1365baf7
ON		 1522static void stop_data_traffic(struct acm *acm)
1523{
1524 int i;
a5cc7ef9 1525
1365baf7 1526 usb_kill_urb(acm->ctrlurb);
6e47e069 1527 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1528 usb_kill_urb(acm->wb[i].urb);
1365baf7 1529 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1530 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1531
1532 cancel_work_sync(&acm->work);
1533}
1534
1da177e4
LT		 1535static void acm_disconnect(struct usb_interface *intf)
1536{
c4cabd28 1537 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1538 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1539 struct tty_struct *tty;
7fb57a01
HS		 1540 int i;
1541
672c4e18
DB		 1542 /* sibling interface is already cleaning up */
1543 if (!acm)
86067eea 1544 return;
672c4e18 1545
7fb57a01
HS		 1546 mutex_lock(&acm->mutex);
1547 acm->disconnected = true;
6e47e069 1548 if (acm->country_codes) {
74da5d68
AS		 1549 device_remove_file(&acm->control->dev,
1550 &dev_attr_wCountryCodes);
1551 device_remove_file(&acm->control->dev,
1552 &dev_attr_iCountryCodeRelDate);
c4cabd28 1553 }
5a6a62bd 1554 wake_up_all(&acm->wioctl);
74da5d68 1555 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1556 usb_set_intfdata(acm->control, NULL);
1557 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1558 mutex_unlock(&acm->mutex);
1559
1560 tty = tty_port_tty_get(&acm->port);
1561 if (tty) {
1562 tty_vhangup(tty);
1563 tty_kref_put(tty);
1564 }
1da177e4 1565
1365baf7 1566 stop_data_traffic(acm);
1da177e4 1567
cb25505f
JH		 1568 tty_unregister_device(acm_tty_driver, acm->minor);
1569
7fb57a01
HS		 1570 usb_free_urb(acm->ctrlurb);
1571 for (i = 0; i < ACM_NW; i++)
1572 usb_free_urb(acm->wb[i].urb);
1573 for (i = 0; i < acm->rx_buflimit; i++)
1574 usb_free_urb(acm->read_urbs[i]);
884b600f 1575 acm_write_buffers_free(acm);
7fb57a01 1576 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1577 acm_read_buffers_free(acm);
1da177e4 1578
a2bfb4a3
ON		 1579 if (!acm->combined_interfaces)
1580 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1581 acm->data : acm->control);
1da177e4 1582
7fb57a01 1583 tty_port_put(&acm->port);
1da177e4
LT		 1584}
1585
35758589 1586#ifdef CONFIG_PM
1365baf7
ON		 1587static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1588{
1589 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1590 int cnt;
1591
bbf0cb3e 1592 spin_lock_irq(&acm->write_lock);
5b1b0b81 1593 if (PMSG_IS_AUTO(message)) {
5a345c20 1594 if (acm->transmitting) {
bbf0cb3e 1595 spin_unlock_irq(&acm->write_lock);
11ea859d 1596 return -EBUSY;
5a345c20 1597 }
11ea859d 1598 }
11ea859d 1599 cnt = acm->susp_count++;
bbf0cb3e 1600 spin_unlock_irq(&acm->write_lock);
1365baf7 1601
11ea859d 1602 if (cnt)
1365baf7 1603 return 0;
1365baf7 1604
ed797074 1605 stop_data_traffic(acm);
1365baf7 1606
1365baf7
ON		 1607 return 0;
1608}
1609
1610static int acm_resume(struct usb_interface *intf)
1611{
1612 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1613 struct urb *urb;
1365baf7
ON		 1614 int rv = 0;
1615
bbf0cb3e 1616 spin_lock_irq(&acm->write_lock);
11ea859d 1617
e144ed28
JH		 1618 if (--acm->susp_count)
1619 goto out;
1365baf7 1620
d41861ca 1621 if (tty_port_initialized(&acm->port)) {
e144ed28 1622 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1623
140cb81a
JH		 1624 for (;;) {
1625 urb = usb_get_from_anchor(&acm->delayed);
1626 if (!urb)
1627 break;
1628
1629 acm_start_wb(acm, urb->context);
97d35f95
ON		 1630 }
1631
1632 /*
1633 * delayed error checking because we must
1634 * do the write path at all cost
1635 */
1365baf7 1636 if (rv < 0)
e144ed28 1637 goto out;
1365baf7 1638
e144ed28 1639 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1640 }
e144ed28 1641out:
bbf0cb3e 1642 spin_unlock_irq(&acm->write_lock);
1365baf7 1643
1365baf7
ON		 1644 return rv;
1645}
35758589 1646
a91b0c50
FL		 1647static int acm_reset_resume(struct usb_interface *intf)
1648{
1649 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1650
d41861ca 1651 if (tty_port_initialized(&acm->port))
aa27a094 1652 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1653
a91b0c50
FL		 1654 return acm_resume(intf);
1655}
1656
35758589 1657#endif /* CONFIG_PM */
c1479a92
AT		 1658
1659#define NOKIA_PCSUITE_ACM_INFO(x) \
1660 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1661 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1662 USB_CDC_ACM_PROTO_VENDOR)
1663
4035e456
TG		 1664#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1665 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1666 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1667 USB_CDC_ACM_PROTO_VENDOR)
1668
1da177e4
LT		 1669/*
1670 * USB driver structure.
1671 */
1672
6ef4852b 1673static const struct usb_device_id acm_ids[] = {
1da177e4 1674 /* quirky and broken devices */
b20b1618
BG		 1675 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1676 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
3b59d16c
DC		 1677 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1678 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1679 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1680 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1681 },
b0e2a705
AA		 1682 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1683 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1684 },
0f9c7b4a
AL		 1685 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1686 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1687 },
8753e65e
MO		 1688 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1689 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1690 },
91a9c921
CM		 1691 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1692 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1693 },
7abcf20b
AC		 1694 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1695 .driver_info = SINGLE_RX_URB,
1696 },
86478944
ON		 1697 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1698 .driver_info = SINGLE_RX_URB, /* firmware bug */
1699 },
3dd2ae81
ON		 1700 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1701 .driver_info = SINGLE_RX_URB, /* firmware bug */
1702 },
9be8456c
ON		 1703 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1704 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1705 },
6149ed5e
IM		 1706 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1707 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1708 },
c8fd2c37
ES		 1709 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1710 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1711 },
c89c60e9
AC		 1712 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1713 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1714 },
cab98a0a
XK		 1715 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1716 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1717 },
2a8cdfde
JH		 1718 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1719 .driver_info = QUIRK_CONTROL_LINE_STATE, },
cf84a691 1720 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
155df65a
DT		 1721 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1722 },
6abff5dc
KH		 1723 /* Motorola H24 HSPA module: */
1724 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1725 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1726 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1727 },
1728 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1729 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1730 },
1731 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1732 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1733 },
1734 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1735 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1736 },
1737 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1738 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1739 },
1740 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1741 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1742 },
1743 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1744 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1745 },
6abff5dc 1746
c332b4e1
AR		 1747 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1748 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1749 data interface instead of
1750 communications interface.
1751 Maybe we should define a new
1752 quirk for this. */
1753 },
e7d491a1
JCR		 1754 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1755 .driver_info = NO_UNION_NORMAL,
1756 },
036915a7
DL		 1757 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1758 .driver_info = NO_UNION_NORMAL,
1759 },
1f17c502
KK		 1760 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1761 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1762 },
c3baa19b
RN		 1763 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1764 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1765 },
9be8456c 1766
15bf722e
AS		 1767 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1768 .driver_info = CLEAR_HALT_CONDITIONS,
1769 },
1770
c1479a92
AT		 1771 /* Nokia S60 phones expose two ACM channels. The first is
1772 * a modem and is picked up by the standard AT-command
1773 * information below. The second is 'vendor-specific' but
1774 * is treated as a serial device at the S60 end, so we want
1775 * to expose it on Linux too. */
1776 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1778 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1780 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1783 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1787 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1791 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1792 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1793 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1794 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1795 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1796 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1797 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1798 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1799 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1802 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1803 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1805 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1806 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1807 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1808 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1809 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1810 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1811 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1812 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1813 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1814 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1815 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1816 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1817 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1818 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1819 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1820 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1821 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1822 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1823 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1824 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1825 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1826 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1827 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1828 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1829 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1830 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1831 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1832 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1833 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1834
65e52f41
DP		 1835 /* Support for Owen devices */
1836 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1837
c1479a92
AT		 1838 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1839
fd5054c1
ES		 1840 /* Support for Droids MuIn LCD */
1841 { USB_DEVICE(0x04d8, 0x000b),
1842 .driver_info = NO_DATA_INTERFACE,
1843 },
1844
16142655
DT		 1845#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1846 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1847 .driver_info = IGNORE_DEVICE,
1848 },
1849 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1850 .driver_info = IGNORE_DEVICE,
1851 },
1852#endif
1853
e912e685
ON		 1854 /*Samsung phone in firmware update mode */
1855 { USB_DEVICE(0x04e8, 0x685d),
1856 .driver_info = IGNORE_DEVICE,
1857 },
1858
f33a7f72
JJ		 1859 /* Exclude Infineon Flash Loader utility */
1860 { USB_DEVICE(0x058b, 0x0041),
1861 .driver_info = IGNORE_DEVICE,
1862 },
1863
5b239f0a
PC		 1864 /* control interfaces without any protocol set */
1865 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1866 USB_CDC_PROTO_NONE) },
1867
1da177e4
LT		 1868 /* control interfaces with various AT-command sets */
1869 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1870 USB_CDC_ACM_PROTO_AT_V25TER) },
1871 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1872 USB_CDC_ACM_PROTO_AT_PCCA101) },
1873 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1874 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1875 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1876 USB_CDC_ACM_PROTO_AT_GSM) },
1877 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1878 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1879 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1880 USB_CDC_ACM_PROTO_AT_CDMA) },
1881
ffdb1e36
LB		 1882 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1883 .driver_info = SEND_ZERO_PACKET,
1884 },
1885
1da177e4
LT		 1886 { }
1887};
1888
6e47e069 1889MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1890
1891static struct usb_driver acm_driver = {
1da177e4
LT		 1892 .name = "cdc_acm",
1893 .probe = acm_probe,
1894 .disconnect = acm_disconnect,
35758589 1895#ifdef CONFIG_PM
1365baf7
ON		 1896 .suspend = acm_suspend,
1897 .resume = acm_resume,
a91b0c50 1898 .reset_resume = acm_reset_resume,
35758589 1899#endif
1da177e4 1900 .id_table = acm_ids,
35758589 1901#ifdef CONFIG_PM
1365baf7 1902 .supports_autosuspend = 1,
35758589 1903#endif
e1f12eb6 1904 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1905};
1906
1907/*
1908 * TTY driver structures.
1909 */
1910
b68e31d0 1911static const struct tty_operations acm_ops = {
7fb57a01 1912 .install = acm_tty_install,
1da177e4
LT		 1913 .open = acm_tty_open,
1914 .close = acm_tty_close,
7fb57a01 1915 .cleanup = acm_tty_cleanup,
10077d4a 1916 .hangup = acm_tty_hangup,
1da177e4 1917 .write = acm_tty_write,
a81cf979
ON		 1918 .put_char = acm_tty_put_char,
1919 .flush_chars = acm_tty_flush_chars,
1da177e4
LT		 1920 .write_room = acm_tty_write_room,
1921 .ioctl = acm_tty_ioctl,
1922 .throttle = acm_tty_throttle,
1923 .unthrottle = acm_tty_unthrottle,
1924 .chars_in_buffer = acm_tty_chars_in_buffer,
1925 .break_ctl = acm_tty_break_ctl,
1926 .set_termios = acm_tty_set_termios,
1927 .tiocmget = acm_tty_tiocmget,
1928 .tiocmset = acm_tty_tiocmset,
1929};
1930
1931/*
1932 * Init / exit.
1933 */
1934
1935static int __init acm_init(void)
1936{
1937 int retval;
1938 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1939 if (!acm_tty_driver)
1940 return -ENOMEM;
1da177e4
LT		 1941 acm_tty_driver->driver_name = "acm",
1942 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1943 acm_tty_driver->major = ACM_TTY_MAJOR,
1944 acm_tty_driver->minor_start = 0,
1945 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1946 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1947 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1948 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1949 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1950 HUPCL | CLOCAL;
1da177e4
LT		 1951 tty_set_operations(acm_tty_driver, &acm_ops);
1952
1953 retval = tty_register_driver(acm_tty_driver);
1954 if (retval) {
1955 put_tty_driver(acm_tty_driver);
1956 return retval;
1957 }
1958
1959 retval = usb_register(&acm_driver);
1960 if (retval) {
1961 tty_unregister_driver(acm_tty_driver);
1962 put_tty_driver(acm_tty_driver);
1963 return retval;
1964 }
1965
a2c7b935 1966 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1967
1968 return 0;
1969}
1970
1971static void __exit acm_exit(void)
1972{
1973 usb_deregister(&acm_driver);
1974 tty_unregister_driver(acm_tty_driver);
1975 put_tty_driver(acm_tty_driver);
91b72560 1976 idr_destroy(&acm_minors);
1da177e4
LT		 1977}
1978
1979module_init(acm_init);
1980module_exit(acm_exit);
1981
6e47e069
AC		 1982MODULE_AUTHOR(DRIVER_AUTHOR);
1983MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1984MODULE_LICENSE("GPL");
e766aeb8 1985MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux kernel - Deliverables
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