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Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm...
[linux-2.6-block.git] / drivers / usb / class / cdc-acm.c
CommitLineData
1da177e4
LT		 1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
a2531293 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
1da177e4
LT		 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
61a87adf 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
088c64f8 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
1da177e4
LT		 11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
1da177e4
LT		 16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31#undef DEBUG
e5fbab51 32#undef VERBOSE_DEBUG
1da177e4
LT		 33
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/init.h>
37#include <linux/slab.h>
38#include <linux/tty.h>
7af25b4b 39#include <linux/serial.h>
1da177e4
LT		 40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
4186ecf8 43#include <linux/mutex.h>
10077d4a 44#include <linux/uaccess.h>
1da177e4 45#include <linux/usb.h>
a8c28f23 46#include <linux/usb/cdc.h>
1da177e4
LT		 47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
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
747 acm->putbuffer = NULL;
748 err = usb_autopm_get_interface_async(acm->control);
749 spin_lock_irqsave(&acm->write_lock, flags);
750 if (err < 0) {
751 cur->use = 0;
752 goto out;
753 }
754
755 if (acm->susp_count)
756 usb_anchor_urb(cur->urb, &acm->delayed);
757 else
758 acm_start_wb(acm, cur);
759out:
760 spin_unlock_irqrestore(&acm->write_lock, flags);
761 return;
762}
763
764static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
765{
766 struct acm *acm = tty->driver_data;
767 struct acm_wb *cur;
768 int wbn;
769 unsigned long flags;
770
771overflow:
772 cur = acm->putbuffer;
773 if (!cur) {
774 spin_lock_irqsave(&acm->write_lock, flags);
775 wbn = acm_wb_alloc(acm);
776 if (wbn >= 0) {
777 cur = &acm->wb[wbn];
778 acm->putbuffer = cur;
779 }
780 spin_unlock_irqrestore(&acm->write_lock, flags);
781 if (!cur)
782 return 0;
783 }
784
785 if (cur->len == acm->writesize) {
786 acm_tty_flush_chars(tty);
787 goto overflow;
788 }
789
790 cur->buf[cur->len++] = ch;
791 return 1;
792}
793
1da177e4
LT		 794static int acm_tty_write_room(struct tty_struct *tty)
795{
796 struct acm *acm = tty->driver_data;
884b600f
ON		 797 /*
798 * Do not let the line discipline to know that we have a reserve,
799 * or it might get too enthusiastic.
800 */
934da463 801 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 802}
803
804static int acm_tty_chars_in_buffer(struct tty_struct *tty)
805{
806 struct acm *acm = tty->driver_data;
7fb57a01
HS		 807 /*
808 * if the device was unplugged then any remaining characters fell out
809 * of the connector ;)
810 */
811 if (acm->disconnected)
23198fda 812 return 0;
884b600f
ON		 813 /*
814 * This is inaccurate (overcounts), but it works.
815 */
86478944 816 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 817}
818
819static void acm_tty_throttle(struct tty_struct *tty)
820{
821 struct acm *acm = tty->driver_data;
088c64f8 822
088c64f8
JH		 823 spin_lock_irq(&acm->read_lock);
824 acm->throttle_req = 1;
825 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 826}
827
828static void acm_tty_unthrottle(struct tty_struct *tty)
829{
830 struct acm *acm = tty->driver_data;
088c64f8
JH		 831 unsigned int was_throttled;
832
088c64f8
JH		 833 spin_lock_irq(&acm->read_lock);
834 was_throttled = acm->throttled;
835 acm->throttled = 0;
836 acm->throttle_req = 0;
837 spin_unlock_irq(&acm->read_lock);
838
839 if (was_throttled)
840 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 841}
842
9e98966c 843static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 844{
845 struct acm *acm = tty->driver_data;
9e98966c 846 int retval;
7fb57a01 847
9e98966c
AC		 848 retval = acm_send_break(acm, state ? 0xffff : 0);
849 if (retval < 0)
a5cc7ef9
JH		 850 dev_dbg(&acm->control->dev, "%s - send break failed\n",
851 __func__);
9e98966c 852 return retval;
1da177e4
LT		 853}
854
60b33c13 855static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 856{
857 struct acm *acm = tty->driver_data;
858
1da177e4
LT		 859 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
860 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
861 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
862 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
863 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
864 TIOCM_CTS;
865}
866
20b9d177 867static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 868 unsigned int set, unsigned int clear)
869{
870 struct acm *acm = tty->driver_data;
871 unsigned int newctrl;
872
1da177e4 873 newctrl = acm->ctrlout;
6e47e069
AC		 874 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
875 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
876 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
877 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 878
879 newctrl = (newctrl & ~clear) | set;
880
881 if (acm->ctrlout == newctrl)
882 return 0;
883 return acm_set_control(acm, acm->ctrlout = newctrl);
884}
885
18c75720
ON		 886static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
887{
888 struct serial_struct tmp;
889
890 if (!info)
891 return -EINVAL;
892
893 memset(&tmp, 0, sizeof(tmp));
894 tmp.flags = ASYNC_LOW_LATENCY;
895 tmp.xmit_fifo_size = acm->writesize;
896 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 897 tmp.close_delay = acm->port.close_delay / 10;
898 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
899 ASYNC_CLOSING_WAIT_NONE :
900 acm->port.closing_wait / 10;
18c75720
ON		 901
902 if (copy_to_user(info, &tmp, sizeof(tmp)))
903 return -EFAULT;
904 else
905 return 0;
906}
907
ba2d8ce9
DW		 908static int set_serial_info(struct acm *acm,
909 struct serial_struct __user *newinfo)
910{
911 struct serial_struct new_serial;
912 unsigned int closing_wait, close_delay;
913 int retval = 0;
914
915 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
916 return -EFAULT;
917
918 close_delay = new_serial.close_delay * 10;
919 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
920 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
921
922 mutex_lock(&acm->port.mutex);
923
924 if (!capable(CAP_SYS_ADMIN)) {
925 if ((close_delay != acm->port.close_delay) ||
926 (closing_wait != acm->port.closing_wait))
927 retval = -EPERM;
928 else
929 retval = -EOPNOTSUPP;
930 } else {
931 acm->port.close_delay = close_delay;
932 acm->port.closing_wait = closing_wait;
933 }
934
935 mutex_unlock(&acm->port.mutex);
936 return retval;
937}
938
5a6a62bd
ON		 939static int wait_serial_change(struct acm *acm, unsigned long arg)
940{
941 int rv = 0;
942 DECLARE_WAITQUEUE(wait, current);
943 struct async_icount old, new;
944
945 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
946 return -EINVAL;
947 do {
948 spin_lock_irq(&acm->read_lock);
949 old = acm->oldcount;
950 new = acm->iocount;
951 acm->oldcount = new;
952 spin_unlock_irq(&acm->read_lock);
953
954 if ((arg & TIOCM_DSR) &&
955 old.dsr != new.dsr)
956 break;
957 if ((arg & TIOCM_CD) &&
958 old.dcd != new.dcd)
959 break;
960 if ((arg & TIOCM_RI) &&
961 old.rng != new.rng)
962 break;
963
964 add_wait_queue(&acm->wioctl, &wait);
965 set_current_state(TASK_INTERRUPTIBLE);
966 schedule();
967 remove_wait_queue(&acm->wioctl, &wait);
968 if (acm->disconnected) {
969 if (arg & TIOCM_CD)
970 break;
971 else
972 rv = -ENODEV;
973 } else {
974 if (signal_pending(current))
975 rv = -ERESTARTSYS;
976 }
977 } while (!rv);
978
979
980
981 return rv;
982}
983
797ef137
ON		 984static int get_serial_usage(struct acm *acm,
985 struct serial_icounter_struct __user *count)
986{
987 struct serial_icounter_struct icount;
988 int rv = 0;
989
990 memset(&icount, 0, sizeof(icount));
991 icount.dsr = acm->iocount.dsr;
992 icount.rng = acm->iocount.rng;
993 icount.dcd = acm->iocount.dcd;
994 icount.frame = acm->iocount.frame;
995 icount.overrun = acm->iocount.overrun;
996 icount.parity = acm->iocount.parity;
997 icount.brk = acm->iocount.brk;
998
999 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
1000 rv = -EFAULT;
1001
1002 return rv;
1003}
1004
6caa76b7 1005static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 1006 unsigned int cmd, unsigned long arg)
1da177e4 1007{
18c75720
ON		 1008 struct acm *acm = tty->driver_data;
1009 int rv = -ENOIOCTLCMD;
1010
1011 switch (cmd) {
1012 case TIOCGSERIAL: /* gets serial port data */
1013 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 1014 break;
1015 case TIOCSSERIAL:
1016 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 1017 break;
5a6a62bd 1018 case TIOCMIWAIT:
8fdbeb26
ON		 1019 rv = usb_autopm_get_interface(acm->control);
1020 if (rv < 0) {
1021 rv = -EIO;
1022 break;
1023 }
5a6a62bd 1024 rv = wait_serial_change(acm, arg);
8fdbeb26 1025 usb_autopm_put_interface(acm->control);
5a6a62bd 1026 break;
797ef137
ON		 1027 case TIOCGICOUNT:
1028 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1029 break;
18c75720
ON		 1030 }
1031
1032 return rv;
1da177e4
LT		 1033}
1034
6e47e069
AC		 1035static void acm_tty_set_termios(struct tty_struct *tty,
1036 struct ktermios *termios_old)
1da177e4
LT		 1037{
1038 struct acm *acm = tty->driver_data;
adc8d746 1039 struct ktermios *termios = &tty->termios;
1da177e4
LT		 1040 struct usb_cdc_line_coding newline;
1041 int newctrl = acm->ctrlout;
1042
9b80fee1 1043 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 1044 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1045 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 1046 (termios->c_cflag & PARODD ? 1 : 2) +
1047 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 1048 switch (termios->c_cflag & CSIZE) {
1049 case CS5:
1050 newline.bDataBits = 5;
1051 break;
1052 case CS6:
1053 newline.bDataBits = 6;
1054 break;
1055 case CS7:
1056 newline.bDataBits = 7;
1057 break;
1058 case CS8:
1059 default:
1060 newline.bDataBits = 8;
1061 break;
1062 }
6e47e069 1063 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 1064 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1065
4473d054 1066 if (C_BAUD(tty) == B0) {
1da177e4
LT		 1067 newline.dwDTERate = acm->line.dwDTERate;
1068 newctrl &= ~ACM_CTRL_DTR;
4473d054 1069 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
6e47e069 1070 newctrl |= ACM_CTRL_DTR;
4473d054 1071 }
1da177e4
LT		 1072
1073 if (newctrl != acm->ctrlout)
1074 acm_set_control(acm, acm->ctrlout = newctrl);
1075
1076 if (memcmp(&acm->line, &newline, sizeof newline)) {
1077 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 1078 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1079 __func__,
1080 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 1081 newline.bCharFormat, newline.bParityType,
1082 newline.bDataBits);
1083 acm_set_line(acm, &acm->line);
1084 }
1085}
1086
7fb57a01 1087static const struct tty_port_operations acm_port_ops = {
0943d8ea 1088 .dtr_rts = acm_port_dtr_rts,
7fb57a01
HS		 1089 .shutdown = acm_port_shutdown,
1090 .activate = acm_port_activate,
1091 .destruct = acm_port_destruct,
1092};
1093
1da177e4
LT		 1094/*
1095 * USB probe and disconnect routines.
1096 */
1097
830f4021 1098/* Little helpers: write/read buffers free */
884b600f
ON		 1099static void acm_write_buffers_free(struct acm *acm)
1100{
1101 int i;
1102 struct acm_wb *wb;
a496c64f 1103 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1104
6e47e069 1105 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1106 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1107}
1108
830f4021
ON		 1109static void acm_read_buffers_free(struct acm *acm)
1110{
1111 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1112 int i;
830f4021 1113
dab54c9f 1114 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1115 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1116 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1117}
1118
884b600f
ON		 1119/* Little helper: write buffers allocate */
1120static int acm_write_buffers_alloc(struct acm *acm)
1121{
1122 int i;
1123 struct acm_wb *wb;
1124
86478944 1125 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1126 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1127 &wb->dmah);
1128 if (!wb->buf) {
1129 while (i != 0) {
1130 --i;
1131 --wb;
997ea58e 1132 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1133 wb->buf, wb->dmah);
1134 }
1135 return -ENOMEM;
1136 }
1137 }
1138 return 0;
1139}
1140
10077d4a
AC		 1141static int acm_probe(struct usb_interface *intf,
1142 const struct usb_device_id *id)
1da177e4
LT		 1143{
1144 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1145 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1146 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1147 int buflen = intf->altsetting->extralen;
1148 struct usb_interface *control_interface;
1149 struct usb_interface *data_interface;
a2bfb4a3
ON		 1150 struct usb_endpoint_descriptor *epctrl = NULL;
1151 struct usb_endpoint_descriptor *epread = NULL;
1152 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1153 struct usb_device *usb_dev = interface_to_usbdev(intf);
1154 struct acm *acm;
1155 int minor;
6e47e069 1156 int ctrlsize, readsize;
1da177e4
LT		 1157 u8 *buf;
1158 u8 ac_management_function = 0;
1159 u8 call_management_function = 0;
1160 int call_interface_num = -1;
fd5054c1 1161 int data_interface_num = -1;
1da177e4 1162 unsigned long quirks;
86478944 1163 int num_rx_buf;
61a87adf 1164 int i;
7e860a6e 1165 unsigned int elength = 0;
a2bfb4a3 1166 int combined_interfaces = 0;
c93d8195
AK		 1167 struct device *tty_dev;
1168 int rv = -ENOMEM;
1da177e4 1169
86478944 1170 /* normal quirks */
1da177e4 1171 quirks = (unsigned long)id->driver_info;
16142655
DT		 1172
1173 if (quirks == IGNORE_DEVICE)
1174 return -ENODEV;
1175
86478944
ON		 1176 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1177
1178 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1179 if (quirks == NO_UNION_NORMAL) {
1180 data_interface = usb_ifnum_to_if(usb_dev, 1);
1181 control_interface = usb_ifnum_to_if(usb_dev, 0);
8835ba4a
ON		 1182 /* we would crash */
1183 if (!data_interface || !control_interface)
1184 return -ENODEV;
1da177e4
LT		 1185 goto skip_normal_probe;
1186 }
6e47e069 1187
1da177e4
LT		 1188 /* normal probing*/
1189 if (!buffer) {
9908a32e 1190 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1191 return -EINVAL;
1192 }
1193
1194 if (!buflen) {
577045c0
TG		 1195 if (intf->cur_altsetting->endpoint &&
1196 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1197 intf->cur_altsetting->endpoint->extra) {
1198 dev_dbg(&intf->dev,
1199 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1200 buflen = intf->cur_altsetting->endpoint->extralen;
1201 buffer = intf->cur_altsetting->endpoint->extra;
1202 } else {
9908a32e
GKH		 1203 dev_err(&intf->dev,
1204 "Zero length descriptor references\n");
1da177e4
LT		 1205 return -EINVAL;
1206 }
1207 }
1208
1209 while (buflen > 0) {
0d3bba02
QC		 1210 elength = buffer[0];
1211 if (!elength) {
1212 dev_err(&intf->dev, "skipping garbage byte\n");
1213 elength = 1;
1214 goto next_desc;
1215 }
6e47e069 1216 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1217 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1218 goto next_desc;
1219 }
1220
6e47e069
AC		 1221 switch (buffer[2]) {
1222 case USB_CDC_UNION_TYPE: /* we've found it */
7e860a6e
ON		 1223 if (elength < sizeof(struct usb_cdc_union_desc))
1224 goto next_desc;
6e47e069
AC		 1225 if (union_header) {
1226 dev_err(&intf->dev, "More than one "
1227 "union descriptor, skipping ...\n");
1228 goto next_desc;
1da177e4 1229 }
6e47e069
AC		 1230 union_header = (struct usb_cdc_union_desc *)buffer;
1231 break;
1232 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
7e860a6e
ON		 1233 if (elength < sizeof(struct usb_cdc_country_functional_desc))
1234 goto next_desc;
6e47e069
AC		 1235 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1236 break;
1237 case USB_CDC_HEADER_TYPE: /* maybe check version */
1238 break; /* for now we ignore it */
1239 case USB_CDC_ACM_TYPE:
7e860a6e
ON		 1240 if (elength < 4)
1241 goto next_desc;
6e47e069
AC		 1242 ac_management_function = buffer[3];
1243 break;
1244 case USB_CDC_CALL_MANAGEMENT_TYPE:
7e860a6e
ON		 1245 if (elength < 5)
1246 goto next_desc;
6e47e069
AC		 1247 call_management_function = buffer[3];
1248 call_interface_num = buffer[4];
6e47e069
AC		 1249 break;
1250 default:
7e860a6e
ON		 1251 /*
1252 * there are LOTS more CDC descriptors that
6e47e069
AC		 1253 * could legitimately be found here.
1254 */
1255 dev_dbg(&intf->dev, "Ignoring descriptor: "
7e860a6e
ON		 1256 "type %02x, length %ud\n",
1257 buffer[2], elength);
6e47e069
AC		 1258 break;
1259 }
1da177e4 1260next_desc:
7e860a6e
ON		 1261 buflen -= elength;
1262 buffer += elength;
1da177e4
LT		 1263 }
1264
1265 if (!union_header) {
1266 if (call_interface_num > 0) {
6e47e069 1267 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1268 /* quirks for Droids MuIn LCD */
1269 if (quirks & NO_DATA_INTERFACE)
1270 data_interface = usb_ifnum_to_if(usb_dev, 0);
1271 else
1272 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1273 control_interface = intf;
1274 } else {
a2bfb4a3
ON		 1275 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1276 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1277 return -ENODEV;
1278 } else {
1279 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1280 combined_interfaces = 1;
1281 control_interface = data_interface = intf;
1282 goto look_for_collapsed_interface;
1283 }
1da177e4
LT		 1284 }
1285 } else {
1286 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1287 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
403dff4e
GKH		 1288 }
1289
1290 if (!control_interface || !data_interface) {
1291 dev_dbg(&intf->dev, "no interfaces\n");
1292 return -ENODEV;
1da177e4 1293 }
6e47e069 1294
1da177e4 1295 if (data_interface_num != call_interface_num)
6e47e069 1296 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1297
a2bfb4a3
ON		 1298 if (control_interface == data_interface) {
1299 /* some broken devices designed for windows work this way */
1300 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1301 combined_interfaces = 1;
1302 /* a popular other OS doesn't use it */
1303 quirks |= NO_CAP_LINE;
1304 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1305 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1306 return -EINVAL;
1307 }
1308look_for_collapsed_interface:
1309 for (i = 0; i < 3; i++) {
1310 struct usb_endpoint_descriptor *ep;
1311 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1312
1313 if (usb_endpoint_is_int_in(ep))
1314 epctrl = ep;
1315 else if (usb_endpoint_is_bulk_out(ep))
1316 epwrite = ep;
1317 else if (usb_endpoint_is_bulk_in(ep))
1318 epread = ep;
1319 else
1320 return -EINVAL;
1321 }
1322 if (!epctrl || !epread || !epwrite)
1323 return -ENODEV;
1324 else
1325 goto made_compressed_probe;
1326 }
1327
1da177e4
LT		 1328skip_normal_probe:
1329
1330 /*workaround for switched interfaces */
6e47e069
AC		 1331 if (data_interface->cur_altsetting->desc.bInterfaceClass
1332 != CDC_DATA_INTERFACE_TYPE) {
1333 if (control_interface->cur_altsetting->desc.bInterfaceClass
1334 == CDC_DATA_INTERFACE_TYPE) {
6e47e069
AC		 1335 dev_dbg(&intf->dev,
1336 "Your device has switched interfaces.\n");
2cfef79d 1337 swap(control_interface, data_interface);
1da177e4
LT		 1338 } else {
1339 return -EINVAL;
1340 }
1341 }
74da5d68
AS		 1342
1343 /* Accept probe requests only for the control interface */
a2bfb4a3 1344 if (!combined_interfaces && intf != control_interface)
74da5d68 1345 return -ENODEV;
6e47e069 1346
a2bfb4a3
ON		 1347 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1348 /* valid in this context */
6e47e069 1349 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1350 return -EBUSY;
1351 }
1352
1353
99f347ca
SS		 1354 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1355 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1356 return -EINVAL;
1357
1358 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1359 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1360 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1361
1362
1363 /* workaround for switched endpoints */
45aea704 1364 if (!usb_endpoint_dir_in(epread)) {
1da177e4 1365 /* descriptors are swapped */
6e47e069
AC		 1366 dev_dbg(&intf->dev,
1367 "The data interface has switched endpoints\n");
2cfef79d 1368 swap(epread, epwrite);
1da177e4 1369 }
a2bfb4a3 1370made_compressed_probe:
a5cc7ef9 1371 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1372
6e47e069 1373 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
17136d49 1374 if (acm == NULL)
1da177e4 1375 goto alloc_fail;
1da177e4 1376
7fb57a01 1377 minor = acm_alloc_minor(acm);
6cb4f4df 1378 if (minor < 0) {
7fb57a01
HS		 1379 dev_err(&intf->dev, "no more free acm devices\n");
1380 kfree(acm);
1381 return -ENODEV;
1382 }
1383
29cc8897
KM		 1384 ctrlsize = usb_endpoint_maxp(epctrl);
1385 readsize = usb_endpoint_maxp(epread) *
6e47e069 1386 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1387 acm->combined_interfaces = combined_interfaces;
29cc8897 1388 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1389 acm->control = control_interface;
1390 acm->data = data_interface;
1391 acm->minor = minor;
1392 acm->dev = usb_dev;
1393 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1394 if (quirks & NO_CAP_LINE)
1395 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1396 acm->ctrlsize = ctrlsize;
1397 acm->readsize = readsize;
86478944 1398 acm->rx_buflimit = num_rx_buf;
c4028958 1399 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1400 init_waitqueue_head(&acm->wioctl);
884b600f 1401 spin_lock_init(&acm->write_lock);
61a87adf 1402 spin_lock_init(&acm->read_lock);
1365baf7 1403 mutex_init(&acm->mutex);
61a87adf 1404 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1405 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1406 if (acm->is_int_ep)
1407 acm->bInterval = epread->bInterval;
739e0285
AC		 1408 tty_port_init(&acm->port);
1409 acm->port.ops = &acm_port_ops;
140cb81a 1410 init_usb_anchor(&acm->delayed);
2a8cdfde 1411 acm->quirks = quirks;
1da177e4 1412
997ea58e 1413 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
17136d49 1414 if (!buf)
1da177e4 1415 goto alloc_fail2;
1da177e4
LT		 1416 acm->ctrl_buffer = buf;
1417
17136d49 1418 if (acm_write_buffers_alloc(acm) < 0)
1da177e4 1419 goto alloc_fail4;
1da177e4
LT		 1420
1421 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1422 if (!acm->ctrlurb)
1da177e4 1423 goto alloc_fail5;
17136d49 1424
86478944 1425 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1426 struct acm_rb *rb = &(acm->read_buffers[i]);
1427 struct urb *urb;
61a87adf 1428
74f5e1ba
JH		 1429 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1430 &rb->dma);
17136d49 1431 if (!rb->base)
74f5e1ba 1432 goto alloc_fail6;
088c64f8
JH		 1433 rb->index = i;
1434 rb->instance = acm;
74f5e1ba 1435
088c64f8 1436 urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1437 if (!urb)
c2572b78 1438 goto alloc_fail6;
17136d49 1439
088c64f8
JH		 1440 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1441 urb->transfer_dma = rb->dma;
1442 if (acm->is_int_ep) {
1443 usb_fill_int_urb(urb, acm->dev,
1444 acm->rx_endpoint,
1445 rb->base,
1446 acm->readsize,
1447 acm_read_bulk_callback, rb,
1448 acm->bInterval);
1449 } else {
1450 usb_fill_bulk_urb(urb, acm->dev,
1451 acm->rx_endpoint,
1452 rb->base,
1453 acm->readsize,
1454 acm_read_bulk_callback, rb);
1455 }
61a87adf 1456
088c64f8
JH		 1457 acm->read_urbs[i] = urb;
1458 __set_bit(i, &acm->read_urbs_free);
61a87adf 1459 }
6e47e069 1460 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1461 struct acm_wb *snd = &(acm->wb[i]);
1462
6e47e069 1463 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1464 if (snd->urb == NULL)
74f5e1ba 1465 goto alloc_fail7;
e4cf3aa8 1466
5186ffee
AL		 1467 if (usb_endpoint_xfer_int(epwrite))
1468 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1469 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1470 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1471 else
1472 usb_fill_bulk_urb(snd->urb, usb_dev,
1473 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1474 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8 1475 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
ffdb1e36
LB		 1476 if (quirks & SEND_ZERO_PACKET)
1477 snd->urb->transfer_flags |= URB_ZERO_PACKET;
e4cf3aa8 1478 snd->instance = acm;
1da177e4
LT		 1479 }
1480
6e47e069 1481 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1482
1483 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1484 if (i < 0)
74f5e1ba 1485 goto alloc_fail7;
c4cabd28
ON		 1486
1487 if (cfd) { /* export the country data */
1488 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1489 if (!acm->country_codes)
1490 goto skip_countries;
1491 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1492 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1493 cfd->bLength - 4);
c4cabd28
ON		 1494 acm->country_rel_date = cfd->iCountryCodeRelDate;
1495
1496 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1497 if (i < 0) {
1498 kfree(acm->country_codes);
e7c8e860
JL		 1499 acm->country_codes = NULL;
1500 acm->country_code_size = 0;
c4cabd28
ON		 1501 goto skip_countries;
1502 }
1503
6e47e069
AC		 1504 i = device_create_file(&intf->dev,
1505 &dev_attr_iCountryCodeRelDate);
c4cabd28 1506 if (i < 0) {
c2572b78 1507 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1508 kfree(acm->country_codes);
e7c8e860
JL		 1509 acm->country_codes = NULL;
1510 acm->country_code_size = 0;
c4cabd28
ON		 1511 goto skip_countries;
1512 }
1513 }
1514
1515skip_countries:
6e47e069 1516 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1517 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1518 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1519 /* works around buggy devices */
d102e78f 1520 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1521 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1522 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1523
1da177e4
LT		 1524 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1525
1da177e4
LT		 1526 acm->line.dwDTERate = cpu_to_le32(9600);
1527 acm->line.bDataBits = 8;
1528 acm_set_line(acm, &acm->line);
1529
1530 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1531 usb_set_intfdata(data_interface, acm);
1da177e4 1532
83ef344a 1533 usb_get_intf(control_interface);
c93d8195 1534 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1535 &control_interface->dev);
c93d8195
AK		 1536 if (IS_ERR(tty_dev)) {
1537 rv = PTR_ERR(tty_dev);
1538 goto alloc_fail8;
1539 }
1da177e4 1540
15bf722e
AS		 1541 if (quirks & CLEAR_HALT_CONDITIONS) {
1542 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1543 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1544 }
1545
c4cabd28 1546 return 0;
c93d8195
AK		 1547alloc_fail8:
1548 if (acm->country_codes) {
1549 device_remove_file(&acm->control->dev,
1550 &dev_attr_wCountryCodes);
1551 device_remove_file(&acm->control->dev,
1552 &dev_attr_iCountryCodeRelDate);
d908f847 1553 kfree(acm->country_codes);
c93d8195
AK		 1554 }
1555 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1556alloc_fail7:
c93d8195 1557 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1558 for (i = 0; i < ACM_NW; i++)
1559 usb_free_urb(acm->wb[i].urb);
c2572b78 1560alloc_fail6:
86478944 1561 for (i = 0; i < num_rx_buf; i++)
088c64f8 1562 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1563 acm_read_buffers_free(acm);
1da177e4
LT		 1564 usb_free_urb(acm->ctrlurb);
1565alloc_fail5:
884b600f 1566 acm_write_buffers_free(acm);
1da177e4 1567alloc_fail4:
997ea58e 1568 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1569alloc_fail2:
7fb57a01 1570 acm_release_minor(acm);
1da177e4
LT		 1571 kfree(acm);
1572alloc_fail:
c93d8195 1573 return rv;
1da177e4
LT		 1574}
1575
1365baf7
ON		 1576static void stop_data_traffic(struct acm *acm)
1577{
1578 int i;
a5cc7ef9
JH		 1579
1580 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1581
1365baf7 1582 usb_kill_urb(acm->ctrlurb);
6e47e069 1583 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1584 usb_kill_urb(acm->wb[i].urb);
1365baf7 1585 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1586 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1587
1588 cancel_work_sync(&acm->work);
1589}
1590
1da177e4
LT		 1591static void acm_disconnect(struct usb_interface *intf)
1592{
c4cabd28 1593 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1594 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1595 struct tty_struct *tty;
7fb57a01
HS		 1596 int i;
1597
1598 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1599
672c4e18
DB		 1600 /* sibling interface is already cleaning up */
1601 if (!acm)
86067eea 1602 return;
672c4e18 1603
7fb57a01
HS		 1604 mutex_lock(&acm->mutex);
1605 acm->disconnected = true;
6e47e069 1606 if (acm->country_codes) {
74da5d68
AS		 1607 device_remove_file(&acm->control->dev,
1608 &dev_attr_wCountryCodes);
1609 device_remove_file(&acm->control->dev,
1610 &dev_attr_iCountryCodeRelDate);
c4cabd28 1611 }
5a6a62bd 1612 wake_up_all(&acm->wioctl);
74da5d68 1613 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1614 usb_set_intfdata(acm->control, NULL);
1615 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1616 mutex_unlock(&acm->mutex);
1617
1618 tty = tty_port_tty_get(&acm->port);
1619 if (tty) {
1620 tty_vhangup(tty);
1621 tty_kref_put(tty);
1622 }
1da177e4 1623
1365baf7 1624 stop_data_traffic(acm);
1da177e4 1625
cb25505f
JH		 1626 tty_unregister_device(acm_tty_driver, acm->minor);
1627
7fb57a01
HS		 1628 usb_free_urb(acm->ctrlurb);
1629 for (i = 0; i < ACM_NW; i++)
1630 usb_free_urb(acm->wb[i].urb);
1631 for (i = 0; i < acm->rx_buflimit; i++)
1632 usb_free_urb(acm->read_urbs[i]);
884b600f 1633 acm_write_buffers_free(acm);
7fb57a01 1634 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1635 acm_read_buffers_free(acm);
1da177e4 1636
a2bfb4a3
ON		 1637 if (!acm->combined_interfaces)
1638 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1639 acm->data : acm->control);
1da177e4 1640
7fb57a01 1641 tty_port_put(&acm->port);
1da177e4
LT		 1642}
1643
35758589 1644#ifdef CONFIG_PM
1365baf7
ON		 1645static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1646{
1647 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1648 int cnt;
1649
bbf0cb3e 1650 spin_lock_irq(&acm->write_lock);
5b1b0b81 1651 if (PMSG_IS_AUTO(message)) {
5a345c20 1652 if (acm->transmitting) {
bbf0cb3e 1653 spin_unlock_irq(&acm->write_lock);
11ea859d 1654 return -EBUSY;
5a345c20 1655 }
11ea859d 1656 }
11ea859d 1657 cnt = acm->susp_count++;
bbf0cb3e 1658 spin_unlock_irq(&acm->write_lock);
1365baf7 1659
11ea859d 1660 if (cnt)
1365baf7 1661 return 0;
1365baf7 1662
ed797074 1663 stop_data_traffic(acm);
1365baf7 1664
1365baf7
ON		 1665 return 0;
1666}
1667
1668static int acm_resume(struct usb_interface *intf)
1669{
1670 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1671 struct urb *urb;
1365baf7
ON		 1672 int rv = 0;
1673
bbf0cb3e 1674 spin_lock_irq(&acm->write_lock);
11ea859d 1675
e144ed28
JH		 1676 if (--acm->susp_count)
1677 goto out;
1365baf7 1678
7fb57a01 1679 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1680 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1681
140cb81a
JH		 1682 for (;;) {
1683 urb = usb_get_from_anchor(&acm->delayed);
1684 if (!urb)
1685 break;
1686
1687 acm_start_wb(acm, urb->context);
97d35f95
ON		 1688 }
1689
1690 /*
1691 * delayed error checking because we must
1692 * do the write path at all cost
1693 */
1365baf7 1694 if (rv < 0)
e144ed28 1695 goto out;
1365baf7 1696
e144ed28 1697 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1698 }
e144ed28 1699out:
bbf0cb3e 1700 spin_unlock_irq(&acm->write_lock);
1365baf7 1701
1365baf7
ON		 1702 return rv;
1703}
35758589 1704
a91b0c50
FL		 1705static int acm_reset_resume(struct usb_interface *intf)
1706{
1707 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1708
aa27a094
JS		 1709 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1710 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1711
a91b0c50
FL		 1712 return acm_resume(intf);
1713}
1714
35758589 1715#endif /* CONFIG_PM */
c1479a92
AT		 1716
1717#define NOKIA_PCSUITE_ACM_INFO(x) \
1718 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1719 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1720 USB_CDC_ACM_PROTO_VENDOR)
1721
4035e456
TG		 1722#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1723 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1724 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1725 USB_CDC_ACM_PROTO_VENDOR)
1726
1da177e4
LT		 1727/*
1728 * USB driver structure.
1729 */
1730
6ef4852b 1731static const struct usb_device_id acm_ids[] = {
1da177e4 1732 /* quirky and broken devices */
b20b1618
BG		 1733 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1734 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
3b59d16c
DC		 1735 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1736 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1737 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1739 },
b0e2a705
AA		 1740 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1742 },
0f9c7b4a
AL		 1743 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1745 },
8753e65e
MO		 1746 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1748 },
91a9c921
CM		 1749 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1750 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1751 },
7abcf20b
AC		 1752 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1753 .driver_info = SINGLE_RX_URB,
1754 },
86478944
ON		 1755 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1756 .driver_info = SINGLE_RX_URB, /* firmware bug */
1757 },
3dd2ae81
ON		 1758 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1759 .driver_info = SINGLE_RX_URB, /* firmware bug */
1760 },
9be8456c
ON		 1761 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1763 },
6149ed5e
IM		 1764 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1766 },
c8fd2c37
ES		 1767 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1769 },
c89c60e9
AC		 1770 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1772 },
cab98a0a
XK		 1773 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1775 },
2a8cdfde
JH		 1776 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1777 .driver_info = QUIRK_CONTROL_LINE_STATE, },
cf84a691 1778 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
155df65a
DT		 1779 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1780 },
6abff5dc
KH		 1781 /* Motorola H24 HSPA module: */
1782 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1783 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1784 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1785 },
1786 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1787 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1788 },
1789 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1790 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1791 },
1792 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1793 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1794 },
1795 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1796 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1797 },
1798 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1799 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1800 },
1801 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1802 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1803 },
6abff5dc 1804
c332b4e1
AR		 1805 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1806 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1807 data interface instead of
1808 communications interface.
1809 Maybe we should define a new
1810 quirk for this. */
1811 },
e7d491a1
JCR		 1812 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1813 .driver_info = NO_UNION_NORMAL,
1814 },
036915a7
DL		 1815 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1816 .driver_info = NO_UNION_NORMAL,
1817 },
1f17c502
KK		 1818 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1819 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1820 },
c3baa19b
RN		 1821 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1822 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1823 },
9be8456c 1824
15bf722e
AS		 1825 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1826 .driver_info = CLEAR_HALT_CONDITIONS,
1827 },
1828
c1479a92
AT		 1829 /* Nokia S60 phones expose two ACM channels. The first is
1830 * a modem and is picked up by the standard AT-command
1831 * information below. The second is 'vendor-specific' but
1832 * is treated as a serial device at the S60 end, so we want
1833 * to expose it on Linux too. */
1834 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1835 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1836 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1837 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1838 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1839 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1840 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1841 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1842 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1843 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1844 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1845 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1846 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1847 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1848 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1849 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1850 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1851 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1852 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1853 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1854 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1855 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1856 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1857 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1858 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1859 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1860 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1861 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1862 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1863 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1864 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1865 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1866 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1867 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1868 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1869 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1870 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1871 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1872 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1873 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1874 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1875 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1876 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1877 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1878 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1879 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1880 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1881 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1882 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1883 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1884 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1885 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1886 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1887 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1888 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1889 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1890 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1891 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1892
65e52f41
DP		 1893 /* Support for Owen devices */
1894 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1895
c1479a92
AT		 1896 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1897
fd5054c1
ES		 1898 /* Support for Droids MuIn LCD */
1899 { USB_DEVICE(0x04d8, 0x000b),
1900 .driver_info = NO_DATA_INTERFACE,
1901 },
1902
16142655
DT		 1903#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1904 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1905 .driver_info = IGNORE_DEVICE,
1906 },
1907 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1908 .driver_info = IGNORE_DEVICE,
1909 },
1910#endif
1911
e912e685
ON		 1912 /*Samsung phone in firmware update mode */
1913 { USB_DEVICE(0x04e8, 0x685d),
1914 .driver_info = IGNORE_DEVICE,
1915 },
1916
f33a7f72
JJ		 1917 /* Exclude Infineon Flash Loader utility */
1918 { USB_DEVICE(0x058b, 0x0041),
1919 .driver_info = IGNORE_DEVICE,
1920 },
1921
5b239f0a
PC		 1922 /* control interfaces without any protocol set */
1923 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1924 USB_CDC_PROTO_NONE) },
1925
1da177e4
LT		 1926 /* control interfaces with various AT-command sets */
1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1928 USB_CDC_ACM_PROTO_AT_V25TER) },
1929 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1930 USB_CDC_ACM_PROTO_AT_PCCA101) },
1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1932 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1934 USB_CDC_ACM_PROTO_AT_GSM) },
1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1936 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1938 USB_CDC_ACM_PROTO_AT_CDMA) },
1939
ffdb1e36
LB		 1940 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1941 .driver_info = SEND_ZERO_PACKET,
1942 },
1943
1da177e4
LT		 1944 { }
1945};
1946
6e47e069 1947MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1948
1949static struct usb_driver acm_driver = {
1da177e4
LT		 1950 .name = "cdc_acm",
1951 .probe = acm_probe,
1952 .disconnect = acm_disconnect,
35758589 1953#ifdef CONFIG_PM
1365baf7
ON		 1954 .suspend = acm_suspend,
1955 .resume = acm_resume,
a91b0c50 1956 .reset_resume = acm_reset_resume,
35758589 1957#endif
1da177e4 1958 .id_table = acm_ids,
35758589 1959#ifdef CONFIG_PM
1365baf7 1960 .supports_autosuspend = 1,
35758589 1961#endif
e1f12eb6 1962 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1963};
1964
1965/*
1966 * TTY driver structures.
1967 */
1968
b68e31d0 1969static const struct tty_operations acm_ops = {
7fb57a01 1970 .install = acm_tty_install,
1da177e4
LT		 1971 .open = acm_tty_open,
1972 .close = acm_tty_close,
7fb57a01 1973 .cleanup = acm_tty_cleanup,
10077d4a 1974 .hangup = acm_tty_hangup,
1da177e4 1975 .write = acm_tty_write,
a81cf979
ON		 1976 .put_char = acm_tty_put_char,
1977 .flush_chars = acm_tty_flush_chars,
1da177e4
LT		 1978 .write_room = acm_tty_write_room,
1979 .ioctl = acm_tty_ioctl,
1980 .throttle = acm_tty_throttle,
1981 .unthrottle = acm_tty_unthrottle,
1982 .chars_in_buffer = acm_tty_chars_in_buffer,
1983 .break_ctl = acm_tty_break_ctl,
1984 .set_termios = acm_tty_set_termios,
1985 .tiocmget = acm_tty_tiocmget,
1986 .tiocmset = acm_tty_tiocmset,
1987};
1988
1989/*
1990 * Init / exit.
1991 */
1992
1993static int __init acm_init(void)
1994{
1995 int retval;
1996 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1997 if (!acm_tty_driver)
1998 return -ENOMEM;
1da177e4
LT		 1999 acm_tty_driver->driver_name = "acm",
2000 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 2001 acm_tty_driver->major = ACM_TTY_MAJOR,
2002 acm_tty_driver->minor_start = 0,
2003 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2004 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 2005 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 2006 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 2007 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2008 HUPCL | CLOCAL;
1da177e4
LT		 2009 tty_set_operations(acm_tty_driver, &acm_ops);
2010
2011 retval = tty_register_driver(acm_tty_driver);
2012 if (retval) {
2013 put_tty_driver(acm_tty_driver);
2014 return retval;
2015 }
2016
2017 retval = usb_register(&acm_driver);
2018 if (retval) {
2019 tty_unregister_driver(acm_tty_driver);
2020 put_tty_driver(acm_tty_driver);
2021 return retval;
2022 }
2023
a2c7b935 2024 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 2025
2026 return 0;
2027}
2028
2029static void __exit acm_exit(void)
2030{
2031 usb_deregister(&acm_driver);
2032 tty_unregister_driver(acm_tty_driver);
2033 put_tty_driver(acm_tty_driver);
91b72560 2034 idr_destroy(&acm_minors);
1da177e4
LT		 2035}
2036
2037module_init(acm_init);
2038module_exit(acm_exit);
2039
6e47e069
AC		 2040MODULE_AUTHOR(DRIVER_AUTHOR);
2041MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 2042MODULE_LICENSE("GPL");
e766aeb8 2043MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)