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USB: cdc-acm: fix write and resume race
[linux-2.6-block.git] / drivers / usb / class / cdc-acm.c
CommitLineData
1da177e4
LT		 1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
a2531293 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
1da177e4
LT		 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
61a87adf 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
088c64f8 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
1da177e4
LT		 11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
1da177e4
LT		 16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31#undef DEBUG
e5fbab51 32#undef VERBOSE_DEBUG
1da177e4
LT		 33
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/init.h>
37#include <linux/slab.h>
38#include <linux/tty.h>
7af25b4b 39#include <linux/serial.h>
1da177e4
LT		 40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
4186ecf8 43#include <linux/mutex.h>
10077d4a 44#include <linux/uaccess.h>
1da177e4 45#include <linux/usb.h>
a8c28f23 46#include <linux/usb/cdc.h>
1da177e4
LT		 47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
61a87adf 49#include <linux/list.h>
1da177e4
LT		 50
51#include "cdc-acm.h"
52
e5fbab51 53
088c64f8 54#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
1da177e4
LT		 55#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57static struct usb_driver acm_driver;
58static struct tty_driver *acm_tty_driver;
59static struct acm *acm_table[ACM_TTY_MINORS];
60
7fb57a01 61static DEFINE_MUTEX(acm_table_lock);
1da177e4 62
7fb57a01
HS		 63/*
64 * acm_table accessors
65 */
1da177e4 66
7fb57a01
HS		 67/*
68 * Look up an ACM structure by index. If found and not disconnected, increment
69 * its refcount and return it with its mutex held.
70 */
71static struct acm *acm_get_by_index(unsigned index)
72{
73 struct acm *acm;
74
75 mutex_lock(&acm_table_lock);
76 acm = acm_table[index];
77 if (acm) {
78 mutex_lock(&acm->mutex);
79 if (acm->disconnected) {
80 mutex_unlock(&acm->mutex);
81 acm = NULL;
82 } else {
83 tty_port_get(&acm->port);
84 mutex_unlock(&acm->mutex);
85 }
86 }
87 mutex_unlock(&acm_table_lock);
88 return acm;
89}
90
91/*
92 * Try to find an available minor number and if found, associate it with 'acm'.
93 */
94static int acm_alloc_minor(struct acm *acm)
95{
96 int minor;
97
98 mutex_lock(&acm_table_lock);
99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
100 if (!acm_table[minor]) {
101 acm_table[minor] = acm;
102 break;
103 }
104 }
105 mutex_unlock(&acm_table_lock);
106
107 return minor;
108}
109
110/* Release the minor number associated with 'acm'. */
111static void acm_release_minor(struct acm *acm)
112{
113 mutex_lock(&acm_table_lock);
114 acm_table[acm->minor] = NULL;
115 mutex_unlock(&acm_table_lock);
116}
739e0285 117
1da177e4
LT		 118/*
119 * Functions for ACM control messages.
120 */
121
6e47e069
AC		 122static int acm_ctrl_msg(struct acm *acm, int request, int value,
123 void *buf, int len)
1da177e4
LT		 124{
125 int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
126 request, USB_RT_ACM, value,
127 acm->control->altsetting[0].desc.bInterfaceNumber,
128 buf, len, 5000);
a5cc7ef9
JH		 129 dev_dbg(&acm->control->dev,
130 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
131 __func__, request, value, len, retval);
1da177e4
LT		 132 return retval < 0 ? retval : 0;
133}
134
135/* devices aren't required to support these requests.
136 * the cdc acm descriptor tells whether they do...
137 */
138#define acm_set_control(acm, control) \
139 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
140#define acm_set_line(acm, line) \
141 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
142#define acm_send_break(acm, ms) \
143 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
144
884b600f
ON		 145/*
146 * Write buffer management.
147 * All of these assume proper locks taken by the caller.
148 */
149
150static int acm_wb_alloc(struct acm *acm)
151{
152 int i, wbn;
153 struct acm_wb *wb;
154
e4cf3aa8 155 wbn = 0;
884b600f
ON		 156 i = 0;
157 for (;;) {
158 wb = &acm->wb[wbn];
159 if (!wb->use) {
160 wb->use = 1;
161 return wbn;
162 }
86478944
ON		 163 wbn = (wbn + 1) % ACM_NW;
164 if (++i >= ACM_NW)
884b600f
ON		 165 return -1;
166 }
167}
168
884b600f
ON		 169static int acm_wb_is_avail(struct acm *acm)
170{
171 int i, n;
e5fbab51 172 unsigned long flags;
884b600f 173
86478944 174 n = ACM_NW;
e5fbab51 175 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 176 for (i = 0; i < ACM_NW; i++)
86478944 177 n -= acm->wb[i].use;
e5fbab51 178 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 179 return n;
180}
181
884b600f 182/*
ad0b65ef 183 * Finish write. Caller must hold acm->write_lock
884b600f 184 */
e4cf3aa8 185static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 186{
e4cf3aa8 187 wb->use = 0;
11ea859d 188 acm->transmitting--;
97d35f95 189 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 190}
191
192/*
193 * Poke write.
11ea859d
ON		 194 *
195 * the caller is responsible for locking
884b600f 196 */
11ea859d
ON		 197
198static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
199{
200 int rc;
201
202 acm->transmitting++;
203
204 wb->urb->transfer_buffer = wb->buf;
205 wb->urb->transfer_dma = wb->dmah;
206 wb->urb->transfer_buffer_length = wb->len;
207 wb->urb->dev = acm->dev;
208
6e47e069
AC		 209 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
210 if (rc < 0) {
a5cc7ef9
JH		 211 dev_err(&acm->data->dev,
212 "%s - usb_submit_urb(write bulk) failed: %d\n",
213 __func__, rc);
11ea859d
ON		 214 acm_write_done(acm, wb);
215 }
216 return rc;
217}
218
c4cabd28
ON		 219/*
220 * attributes exported through sysfs
221 */
222static ssize_t show_caps
223(struct device *dev, struct device_attribute *attr, char *buf)
224{
225 struct usb_interface *intf = to_usb_interface(dev);
226 struct acm *acm = usb_get_intfdata(intf);
227
228 return sprintf(buf, "%d", acm->ctrl_caps);
229}
230static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
231
232static ssize_t show_country_codes
233(struct device *dev, struct device_attribute *attr, char *buf)
234{
235 struct usb_interface *intf = to_usb_interface(dev);
236 struct acm *acm = usb_get_intfdata(intf);
237
238 memcpy(buf, acm->country_codes, acm->country_code_size);
239 return acm->country_code_size;
240}
241
242static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
243
244static ssize_t show_country_rel_date
245(struct device *dev, struct device_attribute *attr, char *buf)
246{
247 struct usb_interface *intf = to_usb_interface(dev);
248 struct acm *acm = usb_get_intfdata(intf);
249
250 return sprintf(buf, "%d", acm->country_rel_date);
251}
884b600f 252
c4cabd28 253static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 254/*
255 * Interrupt handlers for various ACM device responses
256 */
257
258/* control interface reports status changes with "interrupt" transfers */
7d12e780 259static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 260{
261 struct acm *acm = urb->context;
262 struct usb_cdc_notification *dr = urb->transfer_buffer;
263 unsigned char *data;
264 int newctrl;
5a6a62bd 265 int difference;
185d4058
GKH		 266 int retval;
267 int status = urb->status;
1da177e4 268
185d4058 269 switch (status) {
1da177e4
LT		 270 case 0:
271 /* success */
272 break;
273 case -ECONNRESET:
274 case -ENOENT:
275 case -ESHUTDOWN:
276 /* this urb is terminated, clean up */
a5cc7ef9
JH		 277 dev_dbg(&acm->control->dev,
278 "%s - urb shutting down with status: %d\n",
279 __func__, status);
1da177e4
LT		 280 return;
281 default:
a5cc7ef9
JH		 282 dev_dbg(&acm->control->dev,
283 "%s - nonzero urb status received: %d\n",
284 __func__, status);
1da177e4
LT		 285 goto exit;
286 }
287
7e7797e7
JH		 288 usb_mark_last_busy(acm->dev);
289
1da177e4
LT		 290 data = (unsigned char *)(dr + 1);
291 switch (dr->bNotificationType) {
6e47e069 292 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
a5cc7ef9
JH		 293 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
294 __func__, dr->wValue);
6e47e069 295 break;
1da177e4 296
6e47e069 297 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 298 newctrl = get_unaligned_le16(data);
1da177e4 299
aa27a094
JS		 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
301 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
302 __func__);
303 tty_port_tty_hangup(&acm->port, false);
6e47e069 304 }
1da177e4 305
5a6a62bd
ON		 306 difference = acm->ctrlin ^ newctrl;
307 spin_lock(&acm->read_lock);
6e47e069 308 acm->ctrlin = newctrl;
5a6a62bd
ON		 309 acm->oldcount = acm->iocount;
310
311 if (difference & ACM_CTRL_DSR)
312 acm->iocount.dsr++;
313 if (difference & ACM_CTRL_BRK)
314 acm->iocount.brk++;
315 if (difference & ACM_CTRL_RI)
316 acm->iocount.rng++;
317 if (difference & ACM_CTRL_DCD)
318 acm->iocount.dcd++;
319 if (difference & ACM_CTRL_FRAMING)
320 acm->iocount.frame++;
321 if (difference & ACM_CTRL_PARITY)
322 acm->iocount.parity++;
323 if (difference & ACM_CTRL_OVERRUN)
324 acm->iocount.overrun++;
325 spin_unlock(&acm->read_lock);
326
327 if (difference)
328 wake_up_all(&acm->wioctl);
1da177e4 329
5a6a62bd 330 break;
1da177e4 331
6e47e069 332 default:
a5cc7ef9
JH		 333 dev_dbg(&acm->control->dev,
334 "%s - unknown notification %d received: index %d "
335 "len %d data0 %d data1 %d\n",
336 __func__,
6e47e069
AC		 337 dr->bNotificationType, dr->wIndex,
338 dr->wLength, data[0], data[1]);
339 break;
1da177e4
LT		 340 }
341exit:
6e47e069 342 retval = usb_submit_urb(urb, GFP_ATOMIC);
185d4058 343 if (retval)
1d9846e5
JH		 344 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
345 __func__, retval);
1da177e4
LT		 346}
347
088c64f8 348static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 349{
088c64f8 350 int res;
185d4058 351
088c64f8
JH		 352 if (!test_and_clear_bit(index, &acm->read_urbs_free))
353 return 0;
1da177e4 354
088c64f8
JH		 355 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
356
357 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
358 if (res) {
359 if (res != -EPERM) {
360 dev_err(&acm->data->dev,
361 "%s - usb_submit_urb failed: %d\n",
362 __func__, res);
363 }
364 set_bit(index, &acm->read_urbs_free);
365 return res;
11ea859d 366 }
1da177e4 367
088c64f8
JH		 368 return 0;
369}
1da177e4 370
088c64f8
JH		 371static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
372{
373 int res;
374 int i;
61a87adf 375
088c64f8
JH		 376 for (i = 0; i < acm->rx_buflimit; ++i) {
377 res = acm_submit_read_urb(acm, i, mem_flags);
378 if (res)
379 return res;
86478944 380 }
088c64f8
JH		 381
382 return 0;
1da177e4
LT		 383}
384
088c64f8 385static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 386{
088c64f8 387 if (!urb->actual_length)
ca79b7b4 388 return;
61a87adf 389
05c7cd39
JS		 390 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
391 urb->actual_length);
2e124b4a 392 tty_flip_buffer_push(&acm->port);
088c64f8 393}
10077d4a 394
088c64f8
JH		 395static void acm_read_bulk_callback(struct urb *urb)
396{
397 struct acm_rb *rb = urb->context;
398 struct acm *acm = rb->instance;
399 unsigned long flags;
61a87adf 400
088c64f8
JH		 401 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
402 rb->index, urb->actual_length);
403 set_bit(rb->index, &acm->read_urbs_free);
61a87adf 404
088c64f8
JH		 405 if (!acm->dev) {
406 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
407 return;
408 }
409 usb_mark_last_busy(acm->dev);
61a87adf 410
088c64f8
JH		 411 if (urb->status) {
412 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
413 __func__, urb->status);
414 return;
61a87adf 415 }
088c64f8
JH		 416 acm_process_read_urb(acm, urb);
417
418 /* throttle device if requested by tty */
11ea859d 419 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8
JH		 420 acm->throttled = acm->throttle_req;
421 if (!acm->throttled && !acm->susp_count) {
422 spin_unlock_irqrestore(&acm->read_lock, flags);
423 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
424 } else {
425 spin_unlock_irqrestore(&acm->read_lock, flags);
426 }
1da177e4
LT		 427}
428
429/* data interface wrote those outgoing bytes */
7d12e780 430static void acm_write_bulk(struct urb *urb)
1da177e4 431{
cdc97792 432 struct acm_wb *wb = urb->context;
e5fbab51 433 struct acm *acm = wb->instance;
ad0b65ef 434 unsigned long flags;
1da177e4 435
4fa4626c
JH		 436 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
437 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
1d9846e5 438 __func__,
e5fbab51
DB		 439 urb->actual_length,
440 urb->transfer_buffer_length,
441 urb->status);
1da177e4 442
ad0b65ef 443 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 444 acm_write_done(acm, wb);
ad0b65ef 445 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 446 schedule_work(&acm->work);
1da177e4
LT		 447}
448
c4028958 449static void acm_softint(struct work_struct *work)
1da177e4 450{
c4028958 451 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 452
1d9846e5
JH		 453 dev_vdbg(&acm->data->dev, "%s\n", __func__);
454
6aad04f2 455 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 456}
457
458/*
459 * TTY handlers
460 */
461
7fb57a01 462static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 463{
464 struct acm *acm;
7fb57a01 465 int retval;
1da177e4 466
7fb57a01 467 dev_dbg(tty->dev, "%s\n", __func__);
1da177e4 468
7fb57a01
HS		 469 acm = acm_get_by_index(tty->index);
470 if (!acm)
471 return -ENODEV;
a5cc7ef9 472
f8a8c10f 473 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 474 if (retval)
475 goto error_init_termios;
10077d4a 476
1da177e4 477 tty->driver_data = acm;
1da177e4 478
7fb57a01
HS		 479 return 0;
480
481error_init_termios:
482 tty_port_put(&acm->port);
483 return retval;
484}
485
486static int acm_tty_open(struct tty_struct *tty, struct file *filp)
487{
488 struct acm *acm = tty->driver_data;
489
490 dev_dbg(tty->dev, "%s\n", __func__);
491
492 return tty_port_open(&acm->port, tty, filp);
493}
494
495static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
496{
497 struct acm *acm = container_of(port, struct acm, port);
498 int retval = -ENODEV;
499
500 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 501
502 mutex_lock(&acm->mutex);
7fb57a01
HS		 503 if (acm->disconnected)
504 goto disconnected;
505
506 retval = usb_autopm_get_interface(acm->control);
507 if (retval)
508 goto error_get_interface;
509
510 /*
511 * FIXME: Why do we need this? Allocating 64K of physically contiguous
512 * memory is really nasty...
513 */
514 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
515 acm->control->needs_remote_wakeup = 1;
1365baf7 516
1da177e4
LT		 517 acm->ctrlurb->dev = acm->dev;
518 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
a5cc7ef9
JH		 519 dev_err(&acm->control->dev,
520 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
070c0b17 521 usb_autopm_put_interface(acm->control);
7fb57a01 522 goto error_submit_urb;
1da177e4
LT		 523 }
524
7fb57a01
HS		 525 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
526 if (acm_set_control(acm, acm->ctrlout) < 0 &&
070c0b17
AK		 527 (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
528 usb_autopm_put_interface(acm->control);
7fb57a01 529 goto error_set_control;
070c0b17 530 }
10077d4a 531
11ea859d 532 usb_autopm_put_interface(acm->control);
1da177e4 533
6c4707f3
OM		 534 /*
535 * Unthrottle device in case the TTY was closed while throttled.
536 */
537 spin_lock_irq(&acm->read_lock);
538 acm->throttled = 0;
539 acm->throttle_req = 0;
540 spin_unlock_irq(&acm->read_lock);
541
088c64f8 542 if (acm_submit_read_urbs(acm, GFP_KERNEL))
7fb57a01 543 goto error_submit_read_urbs;
2b626dc1 544
1365baf7 545 mutex_unlock(&acm->mutex);
1da177e4 546
7fb57a01
HS		 547 return 0;
548
549error_submit_read_urbs:
550 acm->ctrlout = 0;
551 acm_set_control(acm, acm->ctrlout);
552error_set_control:
553 usb_kill_urb(acm->ctrlurb);
554error_submit_urb:
7fb57a01
HS		 555error_get_interface:
556disconnected:
557 mutex_unlock(&acm->mutex);
558 return retval;
1da177e4
LT		 559}
560
7fb57a01 561static void acm_port_destruct(struct tty_port *port)
83ef344a 562{
7fb57a01
HS		 563 struct acm *acm = container_of(port, struct acm, port);
564
565 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 566
7fb57a01 567 acm_release_minor(acm);
83ef344a 568 usb_put_intf(acm->control);
c4cabd28 569 kfree(acm->country_codes);
83ef344a 570 kfree(acm);
571}
572
7fb57a01 573static void acm_port_shutdown(struct tty_port *port)
10077d4a 574{
7fb57a01 575 struct acm *acm = container_of(port, struct acm, port);
dab54c9f
JH		 576 int i;
577
7fb57a01
HS		 578 dev_dbg(&acm->control->dev, "%s\n", __func__);
579
580 mutex_lock(&acm->mutex);
581 if (!acm->disconnected) {
10077d4a
AC		 582 usb_autopm_get_interface(acm->control);
583 acm_set_control(acm, acm->ctrlout = 0);
10077d4a
AC		 584 usb_kill_urb(acm->ctrlurb);
585 for (i = 0; i < ACM_NW; i++)
586 usb_kill_urb(acm->wb[i].urb);
dab54c9f 587 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 588 usb_kill_urb(acm->read_urbs[i]);
10077d4a
AC		 589 acm->control->needs_remote_wakeup = 0;
590 usb_autopm_put_interface(acm->control);
591 }
7fb57a01
HS		 592 mutex_unlock(&acm->mutex);
593}
594
595static void acm_tty_cleanup(struct tty_struct *tty)
596{
597 struct acm *acm = tty->driver_data;
598 dev_dbg(&acm->control->dev, "%s\n", __func__);
599 tty_port_put(&acm->port);
10077d4a
AC		 600}
601
602static void acm_tty_hangup(struct tty_struct *tty)
603{
604 struct acm *acm = tty->driver_data;
7fb57a01 605 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 606 tty_port_hangup(&acm->port);
10077d4a
AC		 607}
608
1da177e4
LT		 609static void acm_tty_close(struct tty_struct *tty, struct file *filp)
610{
611 struct acm *acm = tty->driver_data;
7fb57a01
HS		 612 dev_dbg(&acm->control->dev, "%s\n", __func__);
613 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 614}
615
6e47e069
AC		 616static int acm_tty_write(struct tty_struct *tty,
617 const unsigned char *buf, int count)
1da177e4
LT		 618{
619 struct acm *acm = tty->driver_data;
620 int stat;
884b600f
ON		 621 unsigned long flags;
622 int wbn;
623 struct acm_wb *wb;
624
1da177e4
LT		 625 if (!count)
626 return 0;
627
5e9e75f8 628 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 629
884b600f 630 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 631 wbn = acm_wb_alloc(acm);
632 if (wbn < 0) {
884b600f 633 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 634 return 0;
635 }
636 wb = &acm->wb[wbn];
1da177e4 637
71c2fb03
GKH		 638 if (!acm->dev) {
639 wb->use = 0;
640 spin_unlock_irqrestore(&acm->write_lock, flags);
641 return -ENODEV;
642 }
643
884b600f 644 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 645 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 646 memcpy(wb->buf, buf, count);
647 wb->len = count;
71c2fb03
GKH		 648
649 usb_autopm_get_interface_async(acm->control);
650 if (acm->susp_count) {
651 if (!acm->delayed_wb)
652 acm->delayed_wb = wb;
653 else
654 usb_autopm_put_interface_async(acm->control);
655 spin_unlock_irqrestore(&acm->write_lock, flags);
656 return count; /* A white lie */
657 }
658 usb_mark_last_busy(acm->dev);
659
660 stat = acm_start_wb(acm, wb);
884b600f 661 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 662
6e47e069 663 if (stat < 0)
1da177e4 664 return stat;
1da177e4
LT		 665 return count;
666}
667
668static int acm_tty_write_room(struct tty_struct *tty)
669{
670 struct acm *acm = tty->driver_data;
884b600f
ON		 671 /*
672 * Do not let the line discipline to know that we have a reserve,
673 * or it might get too enthusiastic.
674 */
934da463 675 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 676}
677
678static int acm_tty_chars_in_buffer(struct tty_struct *tty)
679{
680 struct acm *acm = tty->driver_data;
7fb57a01
HS		 681 /*
682 * if the device was unplugged then any remaining characters fell out
683 * of the connector ;)
684 */
685 if (acm->disconnected)
23198fda 686 return 0;
884b600f
ON		 687 /*
688 * This is inaccurate (overcounts), but it works.
689 */
86478944 690 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 691}
692
693static void acm_tty_throttle(struct tty_struct *tty)
694{
695 struct acm *acm = tty->driver_data;
088c64f8 696
088c64f8
JH		 697 spin_lock_irq(&acm->read_lock);
698 acm->throttle_req = 1;
699 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 700}
701
702static void acm_tty_unthrottle(struct tty_struct *tty)
703{
704 struct acm *acm = tty->driver_data;
088c64f8
JH		 705 unsigned int was_throttled;
706
088c64f8
JH		 707 spin_lock_irq(&acm->read_lock);
708 was_throttled = acm->throttled;
709 acm->throttled = 0;
710 acm->throttle_req = 0;
711 spin_unlock_irq(&acm->read_lock);
712
713 if (was_throttled)
714 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 715}
716
9e98966c 717static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 718{
719 struct acm *acm = tty->driver_data;
9e98966c 720 int retval;
7fb57a01 721
9e98966c
AC		 722 retval = acm_send_break(acm, state ? 0xffff : 0);
723 if (retval < 0)
a5cc7ef9
JH		 724 dev_dbg(&acm->control->dev, "%s - send break failed\n",
725 __func__);
9e98966c 726 return retval;
1da177e4
LT		 727}
728
60b33c13 729static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 730{
731 struct acm *acm = tty->driver_data;
732
1da177e4
LT		 733 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
734 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
735 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
736 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
737 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
738 TIOCM_CTS;
739}
740
20b9d177 741static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 742 unsigned int set, unsigned int clear)
743{
744 struct acm *acm = tty->driver_data;
745 unsigned int newctrl;
746
1da177e4 747 newctrl = acm->ctrlout;
6e47e069
AC		 748 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
749 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
750 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
751 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 752
753 newctrl = (newctrl & ~clear) | set;
754
755 if (acm->ctrlout == newctrl)
756 return 0;
757 return acm_set_control(acm, acm->ctrlout = newctrl);
758}
759
18c75720
ON		 760static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
761{
762 struct serial_struct tmp;
763
764 if (!info)
765 return -EINVAL;
766
767 memset(&tmp, 0, sizeof(tmp));
768 tmp.flags = ASYNC_LOW_LATENCY;
769 tmp.xmit_fifo_size = acm->writesize;
770 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 771 tmp.close_delay = acm->port.close_delay / 10;
772 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
773 ASYNC_CLOSING_WAIT_NONE :
774 acm->port.closing_wait / 10;
18c75720
ON		 775
776 if (copy_to_user(info, &tmp, sizeof(tmp)))
777 return -EFAULT;
778 else
779 return 0;
780}
781
ba2d8ce9
DW		 782static int set_serial_info(struct acm *acm,
783 struct serial_struct __user *newinfo)
784{
785 struct serial_struct new_serial;
786 unsigned int closing_wait, close_delay;
787 int retval = 0;
788
789 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
790 return -EFAULT;
791
792 close_delay = new_serial.close_delay * 10;
793 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
794 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
795
796 mutex_lock(&acm->port.mutex);
797
798 if (!capable(CAP_SYS_ADMIN)) {
799 if ((close_delay != acm->port.close_delay) ||
800 (closing_wait != acm->port.closing_wait))
801 retval = -EPERM;
802 else
803 retval = -EOPNOTSUPP;
804 } else {
805 acm->port.close_delay = close_delay;
806 acm->port.closing_wait = closing_wait;
807 }
808
809 mutex_unlock(&acm->port.mutex);
810 return retval;
811}
812
5a6a62bd
ON		 813static int wait_serial_change(struct acm *acm, unsigned long arg)
814{
815 int rv = 0;
816 DECLARE_WAITQUEUE(wait, current);
817 struct async_icount old, new;
818
819 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
820 return -EINVAL;
821 do {
822 spin_lock_irq(&acm->read_lock);
823 old = acm->oldcount;
824 new = acm->iocount;
825 acm->oldcount = new;
826 spin_unlock_irq(&acm->read_lock);
827
828 if ((arg & TIOCM_DSR) &&
829 old.dsr != new.dsr)
830 break;
831 if ((arg & TIOCM_CD) &&
832 old.dcd != new.dcd)
833 break;
834 if ((arg & TIOCM_RI) &&
835 old.rng != new.rng)
836 break;
837
838 add_wait_queue(&acm->wioctl, &wait);
839 set_current_state(TASK_INTERRUPTIBLE);
840 schedule();
841 remove_wait_queue(&acm->wioctl, &wait);
842 if (acm->disconnected) {
843 if (arg & TIOCM_CD)
844 break;
845 else
846 rv = -ENODEV;
847 } else {
848 if (signal_pending(current))
849 rv = -ERESTARTSYS;
850 }
851 } while (!rv);
852
853
854
855 return rv;
856}
857
797ef137
ON		 858static int get_serial_usage(struct acm *acm,
859 struct serial_icounter_struct __user *count)
860{
861 struct serial_icounter_struct icount;
862 int rv = 0;
863
864 memset(&icount, 0, sizeof(icount));
865 icount.dsr = acm->iocount.dsr;
866 icount.rng = acm->iocount.rng;
867 icount.dcd = acm->iocount.dcd;
868 icount.frame = acm->iocount.frame;
869 icount.overrun = acm->iocount.overrun;
870 icount.parity = acm->iocount.parity;
871 icount.brk = acm->iocount.brk;
872
873 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
874 rv = -EFAULT;
875
876 return rv;
877}
878
6caa76b7 879static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 880 unsigned int cmd, unsigned long arg)
1da177e4 881{
18c75720
ON		 882 struct acm *acm = tty->driver_data;
883 int rv = -ENOIOCTLCMD;
884
885 switch (cmd) {
886 case TIOCGSERIAL: /* gets serial port data */
887 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 888 break;
889 case TIOCSSERIAL:
890 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 891 break;
5a6a62bd 892 case TIOCMIWAIT:
8fdbeb26
ON		 893 rv = usb_autopm_get_interface(acm->control);
894 if (rv < 0) {
895 rv = -EIO;
896 break;
897 }
5a6a62bd 898 rv = wait_serial_change(acm, arg);
8fdbeb26 899 usb_autopm_put_interface(acm->control);
5a6a62bd 900 break;
797ef137
ON		 901 case TIOCGICOUNT:
902 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
903 break;
18c75720
ON		 904 }
905
906 return rv;
1da177e4
LT		 907}
908
6e47e069
AC		 909static void acm_tty_set_termios(struct tty_struct *tty,
910 struct ktermios *termios_old)
1da177e4
LT		 911{
912 struct acm *acm = tty->driver_data;
adc8d746 913 struct ktermios *termios = &tty->termios;
1da177e4
LT		 914 struct usb_cdc_line_coding newline;
915 int newctrl = acm->ctrlout;
916
9b80fee1 917 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 918 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
919 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 920 (termios->c_cflag & PARODD ? 1 : 2) +
921 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 922 switch (termios->c_cflag & CSIZE) {
923 case CS5:
924 newline.bDataBits = 5;
925 break;
926 case CS6:
927 newline.bDataBits = 6;
928 break;
929 case CS7:
930 newline.bDataBits = 7;
931 break;
932 case CS8:
933 default:
934 newline.bDataBits = 8;
935 break;
936 }
6e47e069 937 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 938 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
939
940 if (!newline.dwDTERate) {
941 newline.dwDTERate = acm->line.dwDTERate;
942 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 943 } else
944 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 945
946 if (newctrl != acm->ctrlout)
947 acm_set_control(acm, acm->ctrlout = newctrl);
948
949 if (memcmp(&acm->line, &newline, sizeof newline)) {
950 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 951 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
952 __func__,
953 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 954 newline.bCharFormat, newline.bParityType,
955 newline.bDataBits);
956 acm_set_line(acm, &acm->line);
957 }
958}
959
7fb57a01
HS		 960static const struct tty_port_operations acm_port_ops = {
961 .shutdown = acm_port_shutdown,
962 .activate = acm_port_activate,
963 .destruct = acm_port_destruct,
964};
965
1da177e4
LT		 966/*
967 * USB probe and disconnect routines.
968 */
969
830f4021 970/* Little helpers: write/read buffers free */
884b600f
ON		 971static void acm_write_buffers_free(struct acm *acm)
972{
973 int i;
974 struct acm_wb *wb;
a496c64f 975 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 976
6e47e069 977 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 978 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 979}
980
830f4021
ON		 981static void acm_read_buffers_free(struct acm *acm)
982{
983 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 984 int i;
830f4021 985
dab54c9f 986 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 987 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 988 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 989}
990
884b600f
ON		 991/* Little helper: write buffers allocate */
992static int acm_write_buffers_alloc(struct acm *acm)
993{
994 int i;
995 struct acm_wb *wb;
996
86478944 997 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 998 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 999 &wb->dmah);
1000 if (!wb->buf) {
1001 while (i != 0) {
1002 --i;
1003 --wb;
997ea58e 1004 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1005 wb->buf, wb->dmah);
1006 }
1007 return -ENOMEM;
1008 }
1009 }
1010 return 0;
1011}
1012
10077d4a
AC		 1013static int acm_probe(struct usb_interface *intf,
1014 const struct usb_device_id *id)
1da177e4
LT		 1015{
1016 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1017 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1018 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1019 int buflen = intf->altsetting->extralen;
1020 struct usb_interface *control_interface;
1021 struct usb_interface *data_interface;
a2bfb4a3
ON		 1022 struct usb_endpoint_descriptor *epctrl = NULL;
1023 struct usb_endpoint_descriptor *epread = NULL;
1024 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1025 struct usb_device *usb_dev = interface_to_usbdev(intf);
1026 struct acm *acm;
1027 int minor;
6e47e069 1028 int ctrlsize, readsize;
1da177e4
LT		 1029 u8 *buf;
1030 u8 ac_management_function = 0;
1031 u8 call_management_function = 0;
1032 int call_interface_num = -1;
fd5054c1 1033 int data_interface_num = -1;
1da177e4 1034 unsigned long quirks;
86478944 1035 int num_rx_buf;
61a87adf 1036 int i;
a2bfb4a3 1037 int combined_interfaces = 0;
c93d8195
AK		 1038 struct device *tty_dev;
1039 int rv = -ENOMEM;
1da177e4 1040
86478944 1041 /* normal quirks */
1da177e4 1042 quirks = (unsigned long)id->driver_info;
16142655
DT		 1043
1044 if (quirks == IGNORE_DEVICE)
1045 return -ENODEV;
1046
86478944
ON		 1047 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1048
1049 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1050 if (quirks == NO_UNION_NORMAL) {
1051 data_interface = usb_ifnum_to_if(usb_dev, 1);
1052 control_interface = usb_ifnum_to_if(usb_dev, 0);
1053 goto skip_normal_probe;
1054 }
6e47e069 1055
1da177e4
LT		 1056 /* normal probing*/
1057 if (!buffer) {
9908a32e 1058 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1059 return -EINVAL;
1060 }
1061
1062 if (!buflen) {
577045c0
TG		 1063 if (intf->cur_altsetting->endpoint &&
1064 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1065 intf->cur_altsetting->endpoint->extra) {
1066 dev_dbg(&intf->dev,
1067 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1068 buflen = intf->cur_altsetting->endpoint->extralen;
1069 buffer = intf->cur_altsetting->endpoint->extra;
1070 } else {
9908a32e
GKH		 1071 dev_err(&intf->dev,
1072 "Zero length descriptor references\n");
1da177e4
LT		 1073 return -EINVAL;
1074 }
1075 }
1076
1077 while (buflen > 0) {
6e47e069 1078 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1079 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1080 goto next_desc;
1081 }
1082
6e47e069
AC		 1083 switch (buffer[2]) {
1084 case USB_CDC_UNION_TYPE: /* we've found it */
1085 if (union_header) {
1086 dev_err(&intf->dev, "More than one "
1087 "union descriptor, skipping ...\n");
1088 goto next_desc;
1da177e4 1089 }
6e47e069
AC		 1090 union_header = (struct usb_cdc_union_desc *)buffer;
1091 break;
1092 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1093 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1094 break;
1095 case USB_CDC_HEADER_TYPE: /* maybe check version */
1096 break; /* for now we ignore it */
1097 case USB_CDC_ACM_TYPE:
1098 ac_management_function = buffer[3];
1099 break;
1100 case USB_CDC_CALL_MANAGEMENT_TYPE:
1101 call_management_function = buffer[3];
1102 call_interface_num = buffer[4];
02f824ac 1103 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1104 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1105 break;
1106 default:
1107 /* there are LOTS more CDC descriptors that
1108 * could legitimately be found here.
1109 */
1110 dev_dbg(&intf->dev, "Ignoring descriptor: "
1111 "type %02x, length %d\n",
1112 buffer[2], buffer[0]);
1113 break;
1114 }
1da177e4
LT		 1115next_desc:
1116 buflen -= buffer[0];
1117 buffer += buffer[0];
1118 }
1119
1120 if (!union_header) {
1121 if (call_interface_num > 0) {
6e47e069 1122 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1123 /* quirks for Droids MuIn LCD */
1124 if (quirks & NO_DATA_INTERFACE)
1125 data_interface = usb_ifnum_to_if(usb_dev, 0);
1126 else
1127 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1128 control_interface = intf;
1129 } else {
a2bfb4a3
ON		 1130 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1131 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1132 return -ENODEV;
1133 } else {
1134 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1135 combined_interfaces = 1;
1136 control_interface = data_interface = intf;
1137 goto look_for_collapsed_interface;
1138 }
1da177e4
LT		 1139 }
1140 } else {
1141 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1142 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1143 if (!control_interface || !data_interface) {
6e47e069 1144 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1145 return -ENODEV;
1146 }
1147 }
6e47e069 1148
1da177e4 1149 if (data_interface_num != call_interface_num)
6e47e069 1150 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1151
a2bfb4a3
ON		 1152 if (control_interface == data_interface) {
1153 /* some broken devices designed for windows work this way */
1154 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1155 combined_interfaces = 1;
1156 /* a popular other OS doesn't use it */
1157 quirks |= NO_CAP_LINE;
1158 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1159 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1160 return -EINVAL;
1161 }
1162look_for_collapsed_interface:
1163 for (i = 0; i < 3; i++) {
1164 struct usb_endpoint_descriptor *ep;
1165 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1166
1167 if (usb_endpoint_is_int_in(ep))
1168 epctrl = ep;
1169 else if (usb_endpoint_is_bulk_out(ep))
1170 epwrite = ep;
1171 else if (usb_endpoint_is_bulk_in(ep))
1172 epread = ep;
1173 else
1174 return -EINVAL;
1175 }
1176 if (!epctrl || !epread || !epwrite)
1177 return -ENODEV;
1178 else
1179 goto made_compressed_probe;
1180 }
1181
1da177e4
LT		 1182skip_normal_probe:
1183
1184 /*workaround for switched interfaces */
6e47e069
AC		 1185 if (data_interface->cur_altsetting->desc.bInterfaceClass
1186 != CDC_DATA_INTERFACE_TYPE) {
1187 if (control_interface->cur_altsetting->desc.bInterfaceClass
1188 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1189 struct usb_interface *t;
6e47e069
AC		 1190 dev_dbg(&intf->dev,
1191 "Your device has switched interfaces.\n");
1da177e4
LT		 1192 t = control_interface;
1193 control_interface = data_interface;
1194 data_interface = t;
1195 } else {
1196 return -EINVAL;
1197 }
1198 }
74da5d68
AS		 1199
1200 /* Accept probe requests only for the control interface */
a2bfb4a3 1201 if (!combined_interfaces && intf != control_interface)
74da5d68 1202 return -ENODEV;
6e47e069 1203
a2bfb4a3
ON		 1204 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1205 /* valid in this context */
6e47e069 1206 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1207 return -EBUSY;
1208 }
1209
1210
99f347ca
SS		 1211 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1212 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1213 return -EINVAL;
1214
1215 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1216 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1217 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1218
1219
1220 /* workaround for switched endpoints */
45aea704 1221 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1222 /* descriptors are swapped */
1223 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1224 dev_dbg(&intf->dev,
1225 "The data interface has switched endpoints\n");
1da177e4
LT		 1226 t = epread;
1227 epread = epwrite;
1228 epwrite = t;
1229 }
a2bfb4a3 1230made_compressed_probe:
a5cc7ef9 1231 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1232
6e47e069
AC		 1233 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1234 if (acm == NULL) {
255ab56c 1235 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1236 goto alloc_fail;
1237 }
1da177e4 1238
7fb57a01
HS		 1239 minor = acm_alloc_minor(acm);
1240 if (minor == ACM_TTY_MINORS) {
1241 dev_err(&intf->dev, "no more free acm devices\n");
1242 kfree(acm);
1243 return -ENODEV;
1244 }
1245
29cc8897
KM		 1246 ctrlsize = usb_endpoint_maxp(epctrl);
1247 readsize = usb_endpoint_maxp(epread) *
6e47e069 1248 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1249 acm->combined_interfaces = combined_interfaces;
29cc8897 1250 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1251 acm->control = control_interface;
1252 acm->data = data_interface;
1253 acm->minor = minor;
1254 acm->dev = usb_dev;
1255 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1256 if (quirks & NO_CAP_LINE)
1257 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1258 acm->ctrlsize = ctrlsize;
1259 acm->readsize = readsize;
86478944 1260 acm->rx_buflimit = num_rx_buf;
c4028958 1261 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1262 init_waitqueue_head(&acm->wioctl);
884b600f 1263 spin_lock_init(&acm->write_lock);
61a87adf 1264 spin_lock_init(&acm->read_lock);
1365baf7 1265 mutex_init(&acm->mutex);
61a87adf 1266 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1267 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1268 if (acm->is_int_ep)
1269 acm->bInterval = epread->bInterval;
739e0285
AC		 1270 tty_port_init(&acm->port);
1271 acm->port.ops = &acm_port_ops;
1da177e4 1272
997ea58e 1273 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1274 if (!buf) {
255ab56c 1275 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1276 goto alloc_fail2;
1277 }
1278 acm->ctrl_buffer = buf;
1279
884b600f 1280 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1281 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1282 goto alloc_fail4;
1283 }
1da177e4
LT		 1284
1285 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1286 if (!acm->ctrlurb) {
255ab56c 1287 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1288 goto alloc_fail5;
1289 }
86478944 1290 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1291 struct acm_rb *rb = &(acm->read_buffers[i]);
1292 struct urb *urb;
61a87adf 1293
74f5e1ba
JH		 1294 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1295 &rb->dma);
1296 if (!rb->base) {
1297 dev_err(&intf->dev, "out of memory "
1298 "(read bufs usb_alloc_coherent)\n");
1299 goto alloc_fail6;
1300 }
088c64f8
JH		 1301 rb->index = i;
1302 rb->instance = acm;
74f5e1ba 1303
088c64f8
JH		 1304 urb = usb_alloc_urb(0, GFP_KERNEL);
1305 if (!urb) {
255ab56c 1306 dev_err(&intf->dev,
6e47e069 1307 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1308 goto alloc_fail6;
61a87adf 1309 }
088c64f8
JH		 1310 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1311 urb->transfer_dma = rb->dma;
1312 if (acm->is_int_ep) {
1313 usb_fill_int_urb(urb, acm->dev,
1314 acm->rx_endpoint,
1315 rb->base,
1316 acm->readsize,
1317 acm_read_bulk_callback, rb,
1318 acm->bInterval);
1319 } else {
1320 usb_fill_bulk_urb(urb, acm->dev,
1321 acm->rx_endpoint,
1322 rb->base,
1323 acm->readsize,
1324 acm_read_bulk_callback, rb);
1325 }
61a87adf 1326
088c64f8
JH		 1327 acm->read_urbs[i] = urb;
1328 __set_bit(i, &acm->read_urbs_free);
61a87adf 1329 }
6e47e069 1330 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1331 struct acm_wb *snd = &(acm->wb[i]);
1332
6e47e069
AC		 1333 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1334 if (snd->urb == NULL) {
255ab56c 1335 dev_err(&intf->dev,
59d7fec7 1336 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1337 goto alloc_fail7;
e4cf3aa8
DE		 1338 }
1339
5186ffee
AL		 1340 if (usb_endpoint_xfer_int(epwrite))
1341 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1342 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1343 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1344 else
1345 usb_fill_bulk_urb(snd->urb, usb_dev,
1346 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1347 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1348 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1349 snd->instance = acm;
1da177e4
LT		 1350 }
1351
6e47e069 1352 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1353
1354 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1355 if (i < 0)
74f5e1ba 1356 goto alloc_fail7;
c4cabd28
ON		 1357
1358 if (cfd) { /* export the country data */
1359 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1360 if (!acm->country_codes)
1361 goto skip_countries;
1362 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1363 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1364 cfd->bLength - 4);
c4cabd28
ON		 1365 acm->country_rel_date = cfd->iCountryCodeRelDate;
1366
1367 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1368 if (i < 0) {
1369 kfree(acm->country_codes);
e7c8e860
JL		 1370 acm->country_codes = NULL;
1371 acm->country_code_size = 0;
c4cabd28
ON		 1372 goto skip_countries;
1373 }
1374
6e47e069
AC		 1375 i = device_create_file(&intf->dev,
1376 &dev_attr_iCountryCodeRelDate);
c4cabd28 1377 if (i < 0) {
c2572b78 1378 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1379 kfree(acm->country_codes);
e7c8e860
JL		 1380 acm->country_codes = NULL;
1381 acm->country_code_size = 0;
c4cabd28
ON		 1382 goto skip_countries;
1383 }
1384 }
1385
1386skip_countries:
6e47e069 1387 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1388 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1389 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1390 /* works around buggy devices */
d102e78f 1391 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1392 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1393 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1394
1da177e4
LT		 1395 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1396
1397 acm_set_control(acm, acm->ctrlout);
1398
1399 acm->line.dwDTERate = cpu_to_le32(9600);
1400 acm->line.bDataBits = 8;
1401 acm_set_line(acm, &acm->line);
1402
1403 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1404 usb_set_intfdata(data_interface, acm);
1da177e4 1405
83ef344a 1406 usb_get_intf(control_interface);
c93d8195 1407 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1408 &control_interface->dev);
c93d8195
AK		 1409 if (IS_ERR(tty_dev)) {
1410 rv = PTR_ERR(tty_dev);
1411 goto alloc_fail8;
1412 }
1da177e4 1413
c4cabd28 1414 return 0;
c93d8195
AK		 1415alloc_fail8:
1416 if (acm->country_codes) {
1417 device_remove_file(&acm->control->dev,
1418 &dev_attr_wCountryCodes);
1419 device_remove_file(&acm->control->dev,
1420 &dev_attr_iCountryCodeRelDate);
1421 }
1422 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1423alloc_fail7:
c93d8195 1424 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1425 for (i = 0; i < ACM_NW; i++)
1426 usb_free_urb(acm->wb[i].urb);
c2572b78 1427alloc_fail6:
86478944 1428 for (i = 0; i < num_rx_buf; i++)
088c64f8 1429 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1430 acm_read_buffers_free(acm);
1da177e4
LT		 1431 usb_free_urb(acm->ctrlurb);
1432alloc_fail5:
884b600f 1433 acm_write_buffers_free(acm);
1da177e4 1434alloc_fail4:
997ea58e 1435 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1436alloc_fail2:
7fb57a01 1437 acm_release_minor(acm);
1da177e4
LT		 1438 kfree(acm);
1439alloc_fail:
c93d8195 1440 return rv;
1da177e4
LT		 1441}
1442
1365baf7
ON		 1443static void stop_data_traffic(struct acm *acm)
1444{
1445 int i;
a5cc7ef9
JH		 1446
1447 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1448
1365baf7 1449 usb_kill_urb(acm->ctrlurb);
6e47e069 1450 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1451 usb_kill_urb(acm->wb[i].urb);
1365baf7 1452 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1453 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1454
1455 cancel_work_sync(&acm->work);
1456}
1457
1da177e4
LT		 1458static void acm_disconnect(struct usb_interface *intf)
1459{
c4cabd28 1460 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1461 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1462 struct tty_struct *tty;
7fb57a01
HS		 1463 int i;
1464
1465 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1466
672c4e18
DB		 1467 /* sibling interface is already cleaning up */
1468 if (!acm)
86067eea 1469 return;
672c4e18 1470
7fb57a01
HS		 1471 mutex_lock(&acm->mutex);
1472 acm->disconnected = true;
6e47e069 1473 if (acm->country_codes) {
74da5d68
AS		 1474 device_remove_file(&acm->control->dev,
1475 &dev_attr_wCountryCodes);
1476 device_remove_file(&acm->control->dev,
1477 &dev_attr_iCountryCodeRelDate);
c4cabd28 1478 }
5a6a62bd 1479 wake_up_all(&acm->wioctl);
74da5d68 1480 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1481 usb_set_intfdata(acm->control, NULL);
1482 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1483 mutex_unlock(&acm->mutex);
1484
1485 tty = tty_port_tty_get(&acm->port);
1486 if (tty) {
1487 tty_vhangup(tty);
1488 tty_kref_put(tty);
1489 }
1da177e4 1490
1365baf7 1491 stop_data_traffic(acm);
1da177e4 1492
cb25505f
JH		 1493 tty_unregister_device(acm_tty_driver, acm->minor);
1494
7fb57a01
HS		 1495 usb_free_urb(acm->ctrlurb);
1496 for (i = 0; i < ACM_NW; i++)
1497 usb_free_urb(acm->wb[i].urb);
1498 for (i = 0; i < acm->rx_buflimit; i++)
1499 usb_free_urb(acm->read_urbs[i]);
884b600f 1500 acm_write_buffers_free(acm);
7fb57a01 1501 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1502 acm_read_buffers_free(acm);
1da177e4 1503
a2bfb4a3
ON		 1504 if (!acm->combined_interfaces)
1505 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1506 acm->data : acm->control);
1da177e4 1507
7fb57a01 1508 tty_port_put(&acm->port);
1da177e4
LT		 1509}
1510
35758589 1511#ifdef CONFIG_PM
1365baf7
ON		 1512static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1513{
1514 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1515 int cnt;
1516
5a345c20
JH		 1517 spin_lock_irq(&acm->read_lock);
1518 spin_lock(&acm->write_lock);
5b1b0b81 1519 if (PMSG_IS_AUTO(message)) {
5a345c20
JH		 1520 if (acm->transmitting) {
1521 spin_unlock(&acm->write_lock);
1522 spin_unlock_irq(&acm->read_lock);
11ea859d 1523 return -EBUSY;
5a345c20 1524 }
11ea859d 1525 }
11ea859d
ON		 1526 cnt = acm->susp_count++;
1527 spin_unlock(&acm->write_lock);
1528 spin_unlock_irq(&acm->read_lock);
1365baf7 1529
11ea859d 1530 if (cnt)
1365baf7 1531 return 0;
1365baf7 1532
7fb57a01 1533 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1365baf7
ON		 1534 stop_data_traffic(acm);
1535
1365baf7
ON		 1536 return 0;
1537}
1538
1539static int acm_resume(struct usb_interface *intf)
1540{
1541 struct acm *acm = usb_get_intfdata(intf);
97d35f95 1542 struct acm_wb *wb;
1365baf7
ON		 1543 int rv = 0;
1544
11ea859d 1545 spin_lock_irq(&acm->read_lock);
e144ed28 1546 spin_lock(&acm->write_lock);
11ea859d 1547
e144ed28
JH		 1548 if (--acm->susp_count)
1549 goto out;
1365baf7 1550
7fb57a01 1551 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1552 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1553
97d35f95
ON		 1554 if (acm->delayed_wb) {
1555 wb = acm->delayed_wb;
1556 acm->delayed_wb = NULL;
f0730924 1557 acm_start_wb(acm, wb);
97d35f95
ON		 1558 }
1559
1560 /*
1561 * delayed error checking because we must
1562 * do the write path at all cost
1563 */
1365baf7 1564 if (rv < 0)
e144ed28 1565 goto out;
1365baf7 1566
e144ed28 1567 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1568 }
e144ed28
JH		 1569out:
1570 spin_unlock(&acm->write_lock);
1571 spin_unlock_irq(&acm->read_lock);
1365baf7 1572
1365baf7
ON		 1573 return rv;
1574}
35758589 1575
a91b0c50
FL		 1576static int acm_reset_resume(struct usb_interface *intf)
1577{
1578 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1579
aa27a094
JS		 1580 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1581 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1582
a91b0c50
FL		 1583 return acm_resume(intf);
1584}
1585
35758589 1586#endif /* CONFIG_PM */
c1479a92
AT		 1587
1588#define NOKIA_PCSUITE_ACM_INFO(x) \
1589 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1590 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1591 USB_CDC_ACM_PROTO_VENDOR)
1592
4035e456
TG		 1593#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1594 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1595 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1596 USB_CDC_ACM_PROTO_VENDOR)
1597
1da177e4
LT		 1598/*
1599 * USB driver structure.
1600 */
1601
6ef4852b 1602static const struct usb_device_id acm_ids[] = {
1da177e4 1603 /* quirky and broken devices */
3b59d16c
DC		 1604 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1605 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1606 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1607 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1608 },
b0e2a705
AA		 1609 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1610 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1611 },
0f9c7b4a
AL		 1612 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1613 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1614 },
8753e65e
MO		 1615 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1616 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1617 },
91a9c921
CM		 1618 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1619 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1620 },
7abcf20b
AC		 1621 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1622 .driver_info = SINGLE_RX_URB,
1623 },
86478944
ON		 1624 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1625 .driver_info = SINGLE_RX_URB, /* firmware bug */
1626 },
3dd2ae81
ON		 1627 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1628 .driver_info = SINGLE_RX_URB, /* firmware bug */
1629 },
9be8456c
ON		 1630 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1631 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1632 },
6149ed5e
IM		 1633 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1634 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1635 },
c8fd2c37
ES		 1636 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1637 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1638 },
c89c60e9
AC		 1639 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1640 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1641 },
cab98a0a
XK		 1642 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1643 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1644 },
155df65a
DT		 1645 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1646 },
6abff5dc
KH		 1647 /* Motorola H24 HSPA module: */
1648 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1649 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1650 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1651 },
1652 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1653 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1654 },
1655 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1656 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1657 },
1658 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1659 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1660 },
1661 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1662 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1663 },
1664 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1665 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1666 },
1667 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1668 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1669 },
6abff5dc 1670
c332b4e1
AR		 1671 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1672 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1673 data interface instead of
1674 communications interface.
1675 Maybe we should define a new
1676 quirk for this. */
1677 },
e7d491a1
JCR		 1678 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1679 .driver_info = NO_UNION_NORMAL,
1680 },
036915a7
DL		 1681 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1682 .driver_info = NO_UNION_NORMAL,
1683 },
1f17c502
KK		 1684 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1685 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1686 },
c3baa19b
RN		 1687 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1688 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1689 },
9be8456c 1690
c1479a92
AT		 1691 /* Nokia S60 phones expose two ACM channels. The first is
1692 * a modem and is picked up by the standard AT-command
1693 * information below. The second is 'vendor-specific' but
1694 * is treated as a serial device at the S60 end, so we want
1695 * to expose it on Linux too. */
1696 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1697 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1698 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1699 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1700 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1701 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1702 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1703 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1704 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1705 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1706 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1707 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1708 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1709 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1710 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1711 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1712 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1713 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1714 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1715 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1716 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1717 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1718 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1719 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1720 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1721 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1722 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1723 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1724 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1725 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1727 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1728 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1732 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1736 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1737 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1738 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1739 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1740 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1741 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1742 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1743 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1744 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1746 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1747 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1748 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1750 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1751 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1753 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1754
65e52f41
DP		 1755 /* Support for Owen devices */
1756 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1757
c1479a92
AT		 1758 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1759
7c5d8c39 1760 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1761 { USB_DEVICE(0x0694, 0xff00),
1762 .driver_info = NOT_A_MODEM,
7893afc0 1763 },
7c5d8c39 1764
fd5054c1
ES		 1765 /* Support for Droids MuIn LCD */
1766 { USB_DEVICE(0x04d8, 0x000b),
1767 .driver_info = NO_DATA_INTERFACE,
1768 },
1769
16142655
DT		 1770#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1771 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1772 .driver_info = IGNORE_DEVICE,
1773 },
1774 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1775 .driver_info = IGNORE_DEVICE,
1776 },
1777#endif
1778
5b239f0a
PC		 1779 /* control interfaces without any protocol set */
1780 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1781 USB_CDC_PROTO_NONE) },
1782
1da177e4
LT		 1783 /* control interfaces with various AT-command sets */
1784 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1785 USB_CDC_ACM_PROTO_AT_V25TER) },
1786 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1787 USB_CDC_ACM_PROTO_AT_PCCA101) },
1788 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1789 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1790 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1791 USB_CDC_ACM_PROTO_AT_GSM) },
1792 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1793 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1794 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1795 USB_CDC_ACM_PROTO_AT_CDMA) },
1796
1da177e4
LT		 1797 { }
1798};
1799
6e47e069 1800MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1801
1802static struct usb_driver acm_driver = {
1da177e4
LT		 1803 .name = "cdc_acm",
1804 .probe = acm_probe,
1805 .disconnect = acm_disconnect,
35758589 1806#ifdef CONFIG_PM
1365baf7
ON		 1807 .suspend = acm_suspend,
1808 .resume = acm_resume,
a91b0c50 1809 .reset_resume = acm_reset_resume,
35758589 1810#endif
1da177e4 1811 .id_table = acm_ids,
35758589 1812#ifdef CONFIG_PM
1365baf7 1813 .supports_autosuspend = 1,
35758589 1814#endif
e1f12eb6 1815 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1816};
1817
1818/*
1819 * TTY driver structures.
1820 */
1821
b68e31d0 1822static const struct tty_operations acm_ops = {
7fb57a01 1823 .install = acm_tty_install,
1da177e4
LT		 1824 .open = acm_tty_open,
1825 .close = acm_tty_close,
7fb57a01 1826 .cleanup = acm_tty_cleanup,
10077d4a 1827 .hangup = acm_tty_hangup,
1da177e4
LT		 1828 .write = acm_tty_write,
1829 .write_room = acm_tty_write_room,
1830 .ioctl = acm_tty_ioctl,
1831 .throttle = acm_tty_throttle,
1832 .unthrottle = acm_tty_unthrottle,
1833 .chars_in_buffer = acm_tty_chars_in_buffer,
1834 .break_ctl = acm_tty_break_ctl,
1835 .set_termios = acm_tty_set_termios,
1836 .tiocmget = acm_tty_tiocmget,
1837 .tiocmset = acm_tty_tiocmset,
1838};
1839
1840/*
1841 * Init / exit.
1842 */
1843
1844static int __init acm_init(void)
1845{
1846 int retval;
1847 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1848 if (!acm_tty_driver)
1849 return -ENOMEM;
1da177e4
LT		 1850 acm_tty_driver->driver_name = "acm",
1851 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1852 acm_tty_driver->major = ACM_TTY_MAJOR,
1853 acm_tty_driver->minor_start = 0,
1854 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1855 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1856 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1857 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1858 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1859 HUPCL | CLOCAL;
1da177e4
LT		 1860 tty_set_operations(acm_tty_driver, &acm_ops);
1861
1862 retval = tty_register_driver(acm_tty_driver);
1863 if (retval) {
1864 put_tty_driver(acm_tty_driver);
1865 return retval;
1866 }
1867
1868 retval = usb_register(&acm_driver);
1869 if (retval) {
1870 tty_unregister_driver(acm_tty_driver);
1871 put_tty_driver(acm_tty_driver);
1872 return retval;
1873 }
1874
a2c7b935 1875 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1876
1877 return 0;
1878}
1879
1880static void __exit acm_exit(void)
1881{
1882 usb_deregister(&acm_driver);
1883 tty_unregister_driver(acm_tty_driver);
1884 put_tty_driver(acm_tty_driver);
1885}
1886
1887module_init(acm_init);
1888module_exit(acm_exit);
1889
6e47e069
AC		 1890MODULE_AUTHOR(DRIVER_AUTHOR);
1891MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1892MODULE_LICENSE("GPL");
e766aeb8 1893MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)