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USB: cdc-acm: remove redundant disconnected test from shutdown
[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 124{
bae3f4c5
JH		 125 int retval;
126
127 retval = usb_autopm_get_interface(acm->control);
128 if (retval)
129 return retval;
130
131 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
1da177e4
LT		 132 request, USB_RT_ACM, value,
133 acm->control->altsetting[0].desc.bInterfaceNumber,
134 buf, len, 5000);
bae3f4c5 135
a5cc7ef9
JH		 136 dev_dbg(&acm->control->dev,
137 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
138 __func__, request, value, len, retval);
bae3f4c5
JH		 139
140 usb_autopm_put_interface(acm->control);
141
1da177e4
LT		 142 return retval < 0 ? retval : 0;
143}
144
145/* devices aren't required to support these requests.
146 * the cdc acm descriptor tells whether they do...
147 */
148#define acm_set_control(acm, control) \
149 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
150#define acm_set_line(acm, line) \
151 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
152#define acm_send_break(acm, ms) \
153 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
154
884b600f
ON		 155/*
156 * Write buffer management.
157 * All of these assume proper locks taken by the caller.
158 */
159
160static int acm_wb_alloc(struct acm *acm)
161{
162 int i, wbn;
163 struct acm_wb *wb;
164
e4cf3aa8 165 wbn = 0;
884b600f
ON		 166 i = 0;
167 for (;;) {
168 wb = &acm->wb[wbn];
169 if (!wb->use) {
170 wb->use = 1;
171 return wbn;
172 }
86478944
ON		 173 wbn = (wbn + 1) % ACM_NW;
174 if (++i >= ACM_NW)
884b600f
ON		 175 return -1;
176 }
177}
178
884b600f
ON		 179static int acm_wb_is_avail(struct acm *acm)
180{
181 int i, n;
e5fbab51 182 unsigned long flags;
884b600f 183
86478944 184 n = ACM_NW;
e5fbab51 185 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 186 for (i = 0; i < ACM_NW; i++)
86478944 187 n -= acm->wb[i].use;
e5fbab51 188 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 189 return n;
190}
191
884b600f 192/*
ad0b65ef 193 * Finish write. Caller must hold acm->write_lock
884b600f 194 */
e4cf3aa8 195static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 196{
e4cf3aa8 197 wb->use = 0;
11ea859d 198 acm->transmitting--;
97d35f95 199 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 200}
201
202/*
203 * Poke write.
11ea859d
ON		 204 *
205 * the caller is responsible for locking
884b600f 206 */
11ea859d
ON		 207
208static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
209{
210 int rc;
211
212 acm->transmitting++;
213
214 wb->urb->transfer_buffer = wb->buf;
215 wb->urb->transfer_dma = wb->dmah;
216 wb->urb->transfer_buffer_length = wb->len;
217 wb->urb->dev = acm->dev;
218
6e47e069
AC		 219 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
220 if (rc < 0) {
a5cc7ef9
JH		 221 dev_err(&acm->data->dev,
222 "%s - usb_submit_urb(write bulk) failed: %d\n",
223 __func__, rc);
11ea859d
ON		 224 acm_write_done(acm, wb);
225 }
226 return rc;
227}
228
c4cabd28
ON		 229/*
230 * attributes exported through sysfs
231 */
232static ssize_t show_caps
233(struct device *dev, struct device_attribute *attr, char *buf)
234{
235 struct usb_interface *intf = to_usb_interface(dev);
236 struct acm *acm = usb_get_intfdata(intf);
237
238 return sprintf(buf, "%d", acm->ctrl_caps);
239}
240static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
241
242static ssize_t show_country_codes
243(struct device *dev, struct device_attribute *attr, char *buf)
244{
245 struct usb_interface *intf = to_usb_interface(dev);
246 struct acm *acm = usb_get_intfdata(intf);
247
248 memcpy(buf, acm->country_codes, acm->country_code_size);
249 return acm->country_code_size;
250}
251
252static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
253
254static ssize_t show_country_rel_date
255(struct device *dev, struct device_attribute *attr, char *buf)
256{
257 struct usb_interface *intf = to_usb_interface(dev);
258 struct acm *acm = usb_get_intfdata(intf);
259
260 return sprintf(buf, "%d", acm->country_rel_date);
261}
884b600f 262
c4cabd28 263static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 264/*
265 * Interrupt handlers for various ACM device responses
266 */
267
268/* control interface reports status changes with "interrupt" transfers */
7d12e780 269static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 270{
271 struct acm *acm = urb->context;
272 struct usb_cdc_notification *dr = urb->transfer_buffer;
273 unsigned char *data;
274 int newctrl;
5a6a62bd 275 int difference;
185d4058
GKH		 276 int retval;
277 int status = urb->status;
1da177e4 278
185d4058 279 switch (status) {
1da177e4
LT		 280 case 0:
281 /* success */
282 break;
283 case -ECONNRESET:
284 case -ENOENT:
285 case -ESHUTDOWN:
286 /* this urb is terminated, clean up */
a5cc7ef9
JH		 287 dev_dbg(&acm->control->dev,
288 "%s - urb shutting down with status: %d\n",
289 __func__, status);
1da177e4
LT		 290 return;
291 default:
a5cc7ef9
JH		 292 dev_dbg(&acm->control->dev,
293 "%s - nonzero urb status received: %d\n",
294 __func__, status);
1da177e4
LT		 295 goto exit;
296 }
297
7e7797e7
JH		 298 usb_mark_last_busy(acm->dev);
299
1da177e4
LT		 300 data = (unsigned char *)(dr + 1);
301 switch (dr->bNotificationType) {
6e47e069 302 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
a5cc7ef9
JH		 303 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
304 __func__, dr->wValue);
6e47e069 305 break;
1da177e4 306
6e47e069 307 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 308 newctrl = get_unaligned_le16(data);
1da177e4 309
aa27a094
JS		 310 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
311 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
312 __func__);
313 tty_port_tty_hangup(&acm->port, false);
6e47e069 314 }
1da177e4 315
5a6a62bd
ON		 316 difference = acm->ctrlin ^ newctrl;
317 spin_lock(&acm->read_lock);
6e47e069 318 acm->ctrlin = newctrl;
5a6a62bd
ON		 319 acm->oldcount = acm->iocount;
320
321 if (difference & ACM_CTRL_DSR)
322 acm->iocount.dsr++;
323 if (difference & ACM_CTRL_BRK)
324 acm->iocount.brk++;
325 if (difference & ACM_CTRL_RI)
326 acm->iocount.rng++;
327 if (difference & ACM_CTRL_DCD)
328 acm->iocount.dcd++;
329 if (difference & ACM_CTRL_FRAMING)
330 acm->iocount.frame++;
331 if (difference & ACM_CTRL_PARITY)
332 acm->iocount.parity++;
333 if (difference & ACM_CTRL_OVERRUN)
334 acm->iocount.overrun++;
335 spin_unlock(&acm->read_lock);
336
337 if (difference)
338 wake_up_all(&acm->wioctl);
1da177e4 339
5a6a62bd 340 break;
1da177e4 341
6e47e069 342 default:
a5cc7ef9
JH		 343 dev_dbg(&acm->control->dev,
344 "%s - unknown notification %d received: index %d "
345 "len %d data0 %d data1 %d\n",
346 __func__,
6e47e069
AC		 347 dr->bNotificationType, dr->wIndex,
348 dr->wLength, data[0], data[1]);
349 break;
1da177e4
LT		 350 }
351exit:
6e47e069 352 retval = usb_submit_urb(urb, GFP_ATOMIC);
185d4058 353 if (retval)
1d9846e5
JH		 354 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
355 __func__, retval);
1da177e4
LT		 356}
357
088c64f8 358static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 359{
088c64f8 360 int res;
185d4058 361
088c64f8
JH		 362 if (!test_and_clear_bit(index, &acm->read_urbs_free))
363 return 0;
1da177e4 364
088c64f8
JH		 365 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
366
367 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
368 if (res) {
369 if (res != -EPERM) {
370 dev_err(&acm->data->dev,
371 "%s - usb_submit_urb failed: %d\n",
372 __func__, res);
373 }
374 set_bit(index, &acm->read_urbs_free);
375 return res;
11ea859d 376 }
1da177e4 377
088c64f8
JH		 378 return 0;
379}
1da177e4 380
088c64f8
JH		 381static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
382{
383 int res;
384 int i;
61a87adf 385
088c64f8
JH		 386 for (i = 0; i < acm->rx_buflimit; ++i) {
387 res = acm_submit_read_urb(acm, i, mem_flags);
388 if (res)
389 return res;
86478944 390 }
088c64f8
JH		 391
392 return 0;
1da177e4
LT		 393}
394
088c64f8 395static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 396{
088c64f8 397 if (!urb->actual_length)
ca79b7b4 398 return;
61a87adf 399
05c7cd39
JS		 400 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
401 urb->actual_length);
2e124b4a 402 tty_flip_buffer_push(&acm->port);
088c64f8 403}
10077d4a 404
088c64f8
JH		 405static void acm_read_bulk_callback(struct urb *urb)
406{
407 struct acm_rb *rb = urb->context;
408 struct acm *acm = rb->instance;
409 unsigned long flags;
61a87adf 410
088c64f8
JH		 411 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
412 rb->index, urb->actual_length);
413 set_bit(rb->index, &acm->read_urbs_free);
61a87adf 414
088c64f8
JH		 415 if (!acm->dev) {
416 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
417 return;
418 }
419 usb_mark_last_busy(acm->dev);
61a87adf 420
088c64f8
JH		 421 if (urb->status) {
422 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
423 __func__, urb->status);
424 return;
61a87adf 425 }
088c64f8
JH		 426 acm_process_read_urb(acm, urb);
427
428 /* throttle device if requested by tty */
11ea859d 429 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8 430 acm->throttled = acm->throttle_req;
bbf0cb3e 431 if (!acm->throttled) {
088c64f8
JH		 432 spin_unlock_irqrestore(&acm->read_lock, flags);
433 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
434 } else {
435 spin_unlock_irqrestore(&acm->read_lock, flags);
436 }
1da177e4
LT		 437}
438
439/* data interface wrote those outgoing bytes */
7d12e780 440static void acm_write_bulk(struct urb *urb)
1da177e4 441{
cdc97792 442 struct acm_wb *wb = urb->context;
e5fbab51 443 struct acm *acm = wb->instance;
ad0b65ef 444 unsigned long flags;
1da177e4 445
4fa4626c
JH		 446 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
447 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
1d9846e5 448 __func__,
e5fbab51
DB		 449 urb->actual_length,
450 urb->transfer_buffer_length,
451 urb->status);
1da177e4 452
ad0b65ef 453 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 454 acm_write_done(acm, wb);
ad0b65ef 455 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 456 schedule_work(&acm->work);
1da177e4
LT		 457}
458
c4028958 459static void acm_softint(struct work_struct *work)
1da177e4 460{
c4028958 461 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 462
1d9846e5
JH		 463 dev_vdbg(&acm->data->dev, "%s\n", __func__);
464
6aad04f2 465 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 466}
467
468/*
469 * TTY handlers
470 */
471
7fb57a01 472static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 473{
474 struct acm *acm;
7fb57a01 475 int retval;
1da177e4 476
7fb57a01 477 dev_dbg(tty->dev, "%s\n", __func__);
1da177e4 478
7fb57a01
HS		 479 acm = acm_get_by_index(tty->index);
480 if (!acm)
481 return -ENODEV;
a5cc7ef9 482
f8a8c10f 483 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 484 if (retval)
485 goto error_init_termios;
10077d4a 486
1da177e4 487 tty->driver_data = acm;
1da177e4 488
7fb57a01
HS		 489 return 0;
490
491error_init_termios:
492 tty_port_put(&acm->port);
493 return retval;
494}
495
496static int acm_tty_open(struct tty_struct *tty, struct file *filp)
497{
498 struct acm *acm = tty->driver_data;
499
500 dev_dbg(tty->dev, "%s\n", __func__);
501
502 return tty_port_open(&acm->port, tty, filp);
503}
504
505static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
506{
507 struct acm *acm = container_of(port, struct acm, port);
508 int retval = -ENODEV;
e4c36076 509 int i;
7fb57a01
HS		 510
511 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 512
513 mutex_lock(&acm->mutex);
7fb57a01
HS		 514 if (acm->disconnected)
515 goto disconnected;
516
517 retval = usb_autopm_get_interface(acm->control);
518 if (retval)
519 goto error_get_interface;
520
521 /*
522 * FIXME: Why do we need this? Allocating 64K of physically contiguous
523 * memory is really nasty...
524 */
525 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
526 acm->control->needs_remote_wakeup = 1;
1365baf7 527
1da177e4 528 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 529 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
530 if (retval) {
a5cc7ef9
JH		 531 dev_err(&acm->control->dev,
532 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 533 goto error_submit_urb;
1da177e4
LT		 534 }
535
7fb57a01 536 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
8727bf68
JH		 537 retval = acm_set_control(acm, acm->ctrlout);
538 if (retval < 0 && (acm->ctrl_caps & USB_CDC_CAP_LINE))
7fb57a01 539 goto error_set_control;
10077d4a 540
6c4707f3
OM		 541 /*
542 * Unthrottle device in case the TTY was closed while throttled.
543 */
544 spin_lock_irq(&acm->read_lock);
545 acm->throttled = 0;
546 acm->throttle_req = 0;
547 spin_unlock_irq(&acm->read_lock);
548
8727bf68
JH		 549 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
550 if (retval)
7fb57a01 551 goto error_submit_read_urbs;
2b626dc1 552
703df329
JH		 553 usb_autopm_put_interface(acm->control);
554
1365baf7 555 mutex_unlock(&acm->mutex);
1da177e4 556
7fb57a01
HS		 557 return 0;
558
559error_submit_read_urbs:
e4c36076
JH		 560 for (i = 0; i < acm->rx_buflimit; i++)
561 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 562 acm->ctrlout = 0;
563 acm_set_control(acm, acm->ctrlout);
564error_set_control:
565 usb_kill_urb(acm->ctrlurb);
566error_submit_urb:
703df329 567 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 568error_get_interface:
569disconnected:
570 mutex_unlock(&acm->mutex);
8727bf68
JH		 571
572 return usb_translate_errors(retval);
1da177e4
LT		 573}
574
7fb57a01 575static void acm_port_destruct(struct tty_port *port)
83ef344a 576{
7fb57a01
HS		 577 struct acm *acm = container_of(port, struct acm, port);
578
579 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 580
7fb57a01 581 acm_release_minor(acm);
83ef344a 582 usb_put_intf(acm->control);
c4cabd28 583 kfree(acm->country_codes);
83ef344a 584 kfree(acm);
585}
586
7fb57a01 587static void acm_port_shutdown(struct tty_port *port)
10077d4a 588{
7fb57a01 589 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 590 struct urb *urb;
591 struct acm_wb *wb;
dab54c9f 592 int i;
5292afa6 593 int pm_err;
dab54c9f 594
7fb57a01
HS		 595 dev_dbg(&acm->control->dev, "%s\n", __func__);
596
89e54e44
JH		 597 pm_err = usb_autopm_get_interface(acm->control);
598 acm_set_control(acm, acm->ctrlout = 0);
140cb81a 599
89e54e44
JH		 600 for (;;) {
601 urb = usb_get_from_anchor(&acm->delayed);
602 if (!urb)
603 break;
604 wb = urb->context;
605 wb->use = 0;
606 usb_autopm_put_interface_async(acm->control);
10077d4a 607 }
89e54e44
JH		 608
609 usb_kill_urb(acm->ctrlurb);
610 for (i = 0; i < ACM_NW; i++)
611 usb_kill_urb(acm->wb[i].urb);
612 for (i = 0; i < acm->rx_buflimit; i++)
613 usb_kill_urb(acm->read_urbs[i]);
614
615 acm->control->needs_remote_wakeup = 0;
616 if (!pm_err)
617 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 618}
619
620static void acm_tty_cleanup(struct tty_struct *tty)
621{
622 struct acm *acm = tty->driver_data;
623 dev_dbg(&acm->control->dev, "%s\n", __func__);
624 tty_port_put(&acm->port);
10077d4a
AC		 625}
626
627static void acm_tty_hangup(struct tty_struct *tty)
628{
629 struct acm *acm = tty->driver_data;
7fb57a01 630 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 631 tty_port_hangup(&acm->port);
10077d4a
AC		 632}
633
1da177e4
LT		 634static void acm_tty_close(struct tty_struct *tty, struct file *filp)
635{
636 struct acm *acm = tty->driver_data;
7fb57a01
HS		 637 dev_dbg(&acm->control->dev, "%s\n", __func__);
638 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 639}
640
6e47e069
AC		 641static int acm_tty_write(struct tty_struct *tty,
642 const unsigned char *buf, int count)
1da177e4
LT		 643{
644 struct acm *acm = tty->driver_data;
645 int stat;
884b600f
ON		 646 unsigned long flags;
647 int wbn;
648 struct acm_wb *wb;
649
1da177e4
LT		 650 if (!count)
651 return 0;
652
5e9e75f8 653 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 654
884b600f 655 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 656 wbn = acm_wb_alloc(acm);
657 if (wbn < 0) {
884b600f 658 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 659 return 0;
660 }
661 wb = &acm->wb[wbn];
1da177e4 662
71c2fb03
GKH		 663 if (!acm->dev) {
664 wb->use = 0;
665 spin_unlock_irqrestore(&acm->write_lock, flags);
666 return -ENODEV;
667 }
668
884b600f 669 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 670 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 671 memcpy(wb->buf, buf, count);
672 wb->len = count;
71c2fb03 673
183a4508
JH		 674 stat = usb_autopm_get_interface_async(acm->control);
675 if (stat) {
676 wb->use = 0;
677 spin_unlock_irqrestore(&acm->write_lock, flags);
678 return stat;
679 }
680
71c2fb03 681 if (acm->susp_count) {
140cb81a 682 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 683 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 684 return count;
71c2fb03
GKH		 685 }
686 usb_mark_last_busy(acm->dev);
687
688 stat = acm_start_wb(acm, wb);
884b600f 689 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 690
6e47e069 691 if (stat < 0)
1da177e4 692 return stat;
1da177e4
LT		 693 return count;
694}
695
696static int acm_tty_write_room(struct tty_struct *tty)
697{
698 struct acm *acm = tty->driver_data;
884b600f
ON		 699 /*
700 * Do not let the line discipline to know that we have a reserve,
701 * or it might get too enthusiastic.
702 */
934da463 703 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 704}
705
706static int acm_tty_chars_in_buffer(struct tty_struct *tty)
707{
708 struct acm *acm = tty->driver_data;
7fb57a01
HS		 709 /*
710 * if the device was unplugged then any remaining characters fell out
711 * of the connector ;)
712 */
713 if (acm->disconnected)
23198fda 714 return 0;
884b600f
ON		 715 /*
716 * This is inaccurate (overcounts), but it works.
717 */
86478944 718 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 719}
720
721static void acm_tty_throttle(struct tty_struct *tty)
722{
723 struct acm *acm = tty->driver_data;
088c64f8 724
088c64f8
JH		 725 spin_lock_irq(&acm->read_lock);
726 acm->throttle_req = 1;
727 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 728}
729
730static void acm_tty_unthrottle(struct tty_struct *tty)
731{
732 struct acm *acm = tty->driver_data;
088c64f8
JH		 733 unsigned int was_throttled;
734
088c64f8
JH		 735 spin_lock_irq(&acm->read_lock);
736 was_throttled = acm->throttled;
737 acm->throttled = 0;
738 acm->throttle_req = 0;
739 spin_unlock_irq(&acm->read_lock);
740
741 if (was_throttled)
742 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 743}
744
9e98966c 745static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 746{
747 struct acm *acm = tty->driver_data;
9e98966c 748 int retval;
7fb57a01 749
9e98966c
AC		 750 retval = acm_send_break(acm, state ? 0xffff : 0);
751 if (retval < 0)
a5cc7ef9
JH		 752 dev_dbg(&acm->control->dev, "%s - send break failed\n",
753 __func__);
9e98966c 754 return retval;
1da177e4
LT		 755}
756
60b33c13 757static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 758{
759 struct acm *acm = tty->driver_data;
760
1da177e4
LT		 761 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
762 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
763 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
764 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
765 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
766 TIOCM_CTS;
767}
768
20b9d177 769static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 770 unsigned int set, unsigned int clear)
771{
772 struct acm *acm = tty->driver_data;
773 unsigned int newctrl;
774
1da177e4 775 newctrl = acm->ctrlout;
6e47e069
AC		 776 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
777 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
778 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
779 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 780
781 newctrl = (newctrl & ~clear) | set;
782
783 if (acm->ctrlout == newctrl)
784 return 0;
785 return acm_set_control(acm, acm->ctrlout = newctrl);
786}
787
18c75720
ON		 788static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
789{
790 struct serial_struct tmp;
791
792 if (!info)
793 return -EINVAL;
794
795 memset(&tmp, 0, sizeof(tmp));
796 tmp.flags = ASYNC_LOW_LATENCY;
797 tmp.xmit_fifo_size = acm->writesize;
798 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 799 tmp.close_delay = acm->port.close_delay / 10;
800 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
801 ASYNC_CLOSING_WAIT_NONE :
802 acm->port.closing_wait / 10;
18c75720
ON		 803
804 if (copy_to_user(info, &tmp, sizeof(tmp)))
805 return -EFAULT;
806 else
807 return 0;
808}
809
ba2d8ce9
DW		 810static int set_serial_info(struct acm *acm,
811 struct serial_struct __user *newinfo)
812{
813 struct serial_struct new_serial;
814 unsigned int closing_wait, close_delay;
815 int retval = 0;
816
817 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
818 return -EFAULT;
819
820 close_delay = new_serial.close_delay * 10;
821 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
822 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
823
824 mutex_lock(&acm->port.mutex);
825
826 if (!capable(CAP_SYS_ADMIN)) {
827 if ((close_delay != acm->port.close_delay) ||
828 (closing_wait != acm->port.closing_wait))
829 retval = -EPERM;
830 else
831 retval = -EOPNOTSUPP;
832 } else {
833 acm->port.close_delay = close_delay;
834 acm->port.closing_wait = closing_wait;
835 }
836
837 mutex_unlock(&acm->port.mutex);
838 return retval;
839}
840
5a6a62bd
ON		 841static int wait_serial_change(struct acm *acm, unsigned long arg)
842{
843 int rv = 0;
844 DECLARE_WAITQUEUE(wait, current);
845 struct async_icount old, new;
846
847 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
848 return -EINVAL;
849 do {
850 spin_lock_irq(&acm->read_lock);
851 old = acm->oldcount;
852 new = acm->iocount;
853 acm->oldcount = new;
854 spin_unlock_irq(&acm->read_lock);
855
856 if ((arg & TIOCM_DSR) &&
857 old.dsr != new.dsr)
858 break;
859 if ((arg & TIOCM_CD) &&
860 old.dcd != new.dcd)
861 break;
862 if ((arg & TIOCM_RI) &&
863 old.rng != new.rng)
864 break;
865
866 add_wait_queue(&acm->wioctl, &wait);
867 set_current_state(TASK_INTERRUPTIBLE);
868 schedule();
869 remove_wait_queue(&acm->wioctl, &wait);
870 if (acm->disconnected) {
871 if (arg & TIOCM_CD)
872 break;
873 else
874 rv = -ENODEV;
875 } else {
876 if (signal_pending(current))
877 rv = -ERESTARTSYS;
878 }
879 } while (!rv);
880
881
882
883 return rv;
884}
885
797ef137
ON		 886static int get_serial_usage(struct acm *acm,
887 struct serial_icounter_struct __user *count)
888{
889 struct serial_icounter_struct icount;
890 int rv = 0;
891
892 memset(&icount, 0, sizeof(icount));
893 icount.dsr = acm->iocount.dsr;
894 icount.rng = acm->iocount.rng;
895 icount.dcd = acm->iocount.dcd;
896 icount.frame = acm->iocount.frame;
897 icount.overrun = acm->iocount.overrun;
898 icount.parity = acm->iocount.parity;
899 icount.brk = acm->iocount.brk;
900
901 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
902 rv = -EFAULT;
903
904 return rv;
905}
906
6caa76b7 907static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 908 unsigned int cmd, unsigned long arg)
1da177e4 909{
18c75720
ON		 910 struct acm *acm = tty->driver_data;
911 int rv = -ENOIOCTLCMD;
912
913 switch (cmd) {
914 case TIOCGSERIAL: /* gets serial port data */
915 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 916 break;
917 case TIOCSSERIAL:
918 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 919 break;
5a6a62bd 920 case TIOCMIWAIT:
8fdbeb26
ON		 921 rv = usb_autopm_get_interface(acm->control);
922 if (rv < 0) {
923 rv = -EIO;
924 break;
925 }
5a6a62bd 926 rv = wait_serial_change(acm, arg);
8fdbeb26 927 usb_autopm_put_interface(acm->control);
5a6a62bd 928 break;
797ef137
ON		 929 case TIOCGICOUNT:
930 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
931 break;
18c75720
ON		 932 }
933
934 return rv;
1da177e4
LT		 935}
936
6e47e069
AC		 937static void acm_tty_set_termios(struct tty_struct *tty,
938 struct ktermios *termios_old)
1da177e4
LT		 939{
940 struct acm *acm = tty->driver_data;
adc8d746 941 struct ktermios *termios = &tty->termios;
1da177e4
LT		 942 struct usb_cdc_line_coding newline;
943 int newctrl = acm->ctrlout;
944
9b80fee1 945 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 946 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
947 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 948 (termios->c_cflag & PARODD ? 1 : 2) +
949 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 950 switch (termios->c_cflag & CSIZE) {
951 case CS5:
952 newline.bDataBits = 5;
953 break;
954 case CS6:
955 newline.bDataBits = 6;
956 break;
957 case CS7:
958 newline.bDataBits = 7;
959 break;
960 case CS8:
961 default:
962 newline.bDataBits = 8;
963 break;
964 }
6e47e069 965 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 966 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
967
968 if (!newline.dwDTERate) {
969 newline.dwDTERate = acm->line.dwDTERate;
970 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 971 } else
972 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 973
974 if (newctrl != acm->ctrlout)
975 acm_set_control(acm, acm->ctrlout = newctrl);
976
977 if (memcmp(&acm->line, &newline, sizeof newline)) {
978 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 979 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
980 __func__,
981 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 982 newline.bCharFormat, newline.bParityType,
983 newline.bDataBits);
984 acm_set_line(acm, &acm->line);
985 }
986}
987
7fb57a01
HS		 988static const struct tty_port_operations acm_port_ops = {
989 .shutdown = acm_port_shutdown,
990 .activate = acm_port_activate,
991 .destruct = acm_port_destruct,
992};
993
1da177e4
LT		 994/*
995 * USB probe and disconnect routines.
996 */
997
830f4021 998/* Little helpers: write/read buffers free */
884b600f
ON		 999static void acm_write_buffers_free(struct acm *acm)
1000{
1001 int i;
1002 struct acm_wb *wb;
a496c64f 1003 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 1004
6e47e069 1005 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 1006 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1007}
1008
830f4021
ON		 1009static void acm_read_buffers_free(struct acm *acm)
1010{
1011 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1012 int i;
830f4021 1013
dab54c9f 1014 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1015 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1016 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1017}
1018
884b600f
ON		 1019/* Little helper: write buffers allocate */
1020static int acm_write_buffers_alloc(struct acm *acm)
1021{
1022 int i;
1023 struct acm_wb *wb;
1024
86478944 1025 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1026 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1027 &wb->dmah);
1028 if (!wb->buf) {
1029 while (i != 0) {
1030 --i;
1031 --wb;
997ea58e 1032 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1033 wb->buf, wb->dmah);
1034 }
1035 return -ENOMEM;
1036 }
1037 }
1038 return 0;
1039}
1040
10077d4a
AC		 1041static int acm_probe(struct usb_interface *intf,
1042 const struct usb_device_id *id)
1da177e4
LT		 1043{
1044 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1045 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1046 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1047 int buflen = intf->altsetting->extralen;
1048 struct usb_interface *control_interface;
1049 struct usb_interface *data_interface;
a2bfb4a3
ON		 1050 struct usb_endpoint_descriptor *epctrl = NULL;
1051 struct usb_endpoint_descriptor *epread = NULL;
1052 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1053 struct usb_device *usb_dev = interface_to_usbdev(intf);
1054 struct acm *acm;
1055 int minor;
6e47e069 1056 int ctrlsize, readsize;
1da177e4
LT		 1057 u8 *buf;
1058 u8 ac_management_function = 0;
1059 u8 call_management_function = 0;
1060 int call_interface_num = -1;
fd5054c1 1061 int data_interface_num = -1;
1da177e4 1062 unsigned long quirks;
86478944 1063 int num_rx_buf;
61a87adf 1064 int i;
a2bfb4a3 1065 int combined_interfaces = 0;
c93d8195
AK		 1066 struct device *tty_dev;
1067 int rv = -ENOMEM;
1da177e4 1068
86478944 1069 /* normal quirks */
1da177e4 1070 quirks = (unsigned long)id->driver_info;
16142655
DT		 1071
1072 if (quirks == IGNORE_DEVICE)
1073 return -ENODEV;
1074
86478944
ON		 1075 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1076
1077 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1078 if (quirks == NO_UNION_NORMAL) {
1079 data_interface = usb_ifnum_to_if(usb_dev, 1);
1080 control_interface = usb_ifnum_to_if(usb_dev, 0);
1081 goto skip_normal_probe;
1082 }
6e47e069 1083
1da177e4
LT		 1084 /* normal probing*/
1085 if (!buffer) {
9908a32e 1086 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1087 return -EINVAL;
1088 }
1089
1090 if (!buflen) {
577045c0
TG		 1091 if (intf->cur_altsetting->endpoint &&
1092 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1093 intf->cur_altsetting->endpoint->extra) {
1094 dev_dbg(&intf->dev,
1095 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1096 buflen = intf->cur_altsetting->endpoint->extralen;
1097 buffer = intf->cur_altsetting->endpoint->extra;
1098 } else {
9908a32e
GKH		 1099 dev_err(&intf->dev,
1100 "Zero length descriptor references\n");
1da177e4
LT		 1101 return -EINVAL;
1102 }
1103 }
1104
1105 while (buflen > 0) {
6e47e069 1106 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1107 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1108 goto next_desc;
1109 }
1110
6e47e069
AC		 1111 switch (buffer[2]) {
1112 case USB_CDC_UNION_TYPE: /* we've found it */
1113 if (union_header) {
1114 dev_err(&intf->dev, "More than one "
1115 "union descriptor, skipping ...\n");
1116 goto next_desc;
1da177e4 1117 }
6e47e069
AC		 1118 union_header = (struct usb_cdc_union_desc *)buffer;
1119 break;
1120 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1121 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1122 break;
1123 case USB_CDC_HEADER_TYPE: /* maybe check version */
1124 break; /* for now we ignore it */
1125 case USB_CDC_ACM_TYPE:
1126 ac_management_function = buffer[3];
1127 break;
1128 case USB_CDC_CALL_MANAGEMENT_TYPE:
1129 call_management_function = buffer[3];
1130 call_interface_num = buffer[4];
02f824ac 1131 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1132 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1133 break;
1134 default:
1135 /* there are LOTS more CDC descriptors that
1136 * could legitimately be found here.
1137 */
1138 dev_dbg(&intf->dev, "Ignoring descriptor: "
1139 "type %02x, length %d\n",
1140 buffer[2], buffer[0]);
1141 break;
1142 }
1da177e4
LT		 1143next_desc:
1144 buflen -= buffer[0];
1145 buffer += buffer[0];
1146 }
1147
1148 if (!union_header) {
1149 if (call_interface_num > 0) {
6e47e069 1150 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1151 /* quirks for Droids MuIn LCD */
1152 if (quirks & NO_DATA_INTERFACE)
1153 data_interface = usb_ifnum_to_if(usb_dev, 0);
1154 else
1155 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1156 control_interface = intf;
1157 } else {
a2bfb4a3
ON		 1158 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1159 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1160 return -ENODEV;
1161 } else {
1162 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1163 combined_interfaces = 1;
1164 control_interface = data_interface = intf;
1165 goto look_for_collapsed_interface;
1166 }
1da177e4
LT		 1167 }
1168 } else {
1169 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1170 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1171 if (!control_interface || !data_interface) {
6e47e069 1172 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1173 return -ENODEV;
1174 }
1175 }
6e47e069 1176
1da177e4 1177 if (data_interface_num != call_interface_num)
6e47e069 1178 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1179
a2bfb4a3
ON		 1180 if (control_interface == data_interface) {
1181 /* some broken devices designed for windows work this way */
1182 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1183 combined_interfaces = 1;
1184 /* a popular other OS doesn't use it */
1185 quirks |= NO_CAP_LINE;
1186 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1187 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1188 return -EINVAL;
1189 }
1190look_for_collapsed_interface:
1191 for (i = 0; i < 3; i++) {
1192 struct usb_endpoint_descriptor *ep;
1193 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1194
1195 if (usb_endpoint_is_int_in(ep))
1196 epctrl = ep;
1197 else if (usb_endpoint_is_bulk_out(ep))
1198 epwrite = ep;
1199 else if (usb_endpoint_is_bulk_in(ep))
1200 epread = ep;
1201 else
1202 return -EINVAL;
1203 }
1204 if (!epctrl || !epread || !epwrite)
1205 return -ENODEV;
1206 else
1207 goto made_compressed_probe;
1208 }
1209
1da177e4
LT		 1210skip_normal_probe:
1211
1212 /*workaround for switched interfaces */
6e47e069
AC		 1213 if (data_interface->cur_altsetting->desc.bInterfaceClass
1214 != CDC_DATA_INTERFACE_TYPE) {
1215 if (control_interface->cur_altsetting->desc.bInterfaceClass
1216 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1217 struct usb_interface *t;
6e47e069
AC		 1218 dev_dbg(&intf->dev,
1219 "Your device has switched interfaces.\n");
1da177e4
LT		 1220 t = control_interface;
1221 control_interface = data_interface;
1222 data_interface = t;
1223 } else {
1224 return -EINVAL;
1225 }
1226 }
74da5d68
AS		 1227
1228 /* Accept probe requests only for the control interface */
a2bfb4a3 1229 if (!combined_interfaces && intf != control_interface)
74da5d68 1230 return -ENODEV;
6e47e069 1231
a2bfb4a3
ON		 1232 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1233 /* valid in this context */
6e47e069 1234 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1235 return -EBUSY;
1236 }
1237
1238
99f347ca
SS		 1239 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1240 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1241 return -EINVAL;
1242
1243 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1244 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1245 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1246
1247
1248 /* workaround for switched endpoints */
45aea704 1249 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1250 /* descriptors are swapped */
1251 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1252 dev_dbg(&intf->dev,
1253 "The data interface has switched endpoints\n");
1da177e4
LT		 1254 t = epread;
1255 epread = epwrite;
1256 epwrite = t;
1257 }
a2bfb4a3 1258made_compressed_probe:
a5cc7ef9 1259 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1260
6e47e069
AC		 1261 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1262 if (acm == NULL) {
255ab56c 1263 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1264 goto alloc_fail;
1265 }
1da177e4 1266
7fb57a01
HS		 1267 minor = acm_alloc_minor(acm);
1268 if (minor == ACM_TTY_MINORS) {
1269 dev_err(&intf->dev, "no more free acm devices\n");
1270 kfree(acm);
1271 return -ENODEV;
1272 }
1273
29cc8897
KM		 1274 ctrlsize = usb_endpoint_maxp(epctrl);
1275 readsize = usb_endpoint_maxp(epread) *
6e47e069 1276 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1277 acm->combined_interfaces = combined_interfaces;
29cc8897 1278 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1279 acm->control = control_interface;
1280 acm->data = data_interface;
1281 acm->minor = minor;
1282 acm->dev = usb_dev;
1283 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1284 if (quirks & NO_CAP_LINE)
1285 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1286 acm->ctrlsize = ctrlsize;
1287 acm->readsize = readsize;
86478944 1288 acm->rx_buflimit = num_rx_buf;
c4028958 1289 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1290 init_waitqueue_head(&acm->wioctl);
884b600f 1291 spin_lock_init(&acm->write_lock);
61a87adf 1292 spin_lock_init(&acm->read_lock);
1365baf7 1293 mutex_init(&acm->mutex);
61a87adf 1294 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1295 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1296 if (acm->is_int_ep)
1297 acm->bInterval = epread->bInterval;
739e0285
AC		 1298 tty_port_init(&acm->port);
1299 acm->port.ops = &acm_port_ops;
140cb81a 1300 init_usb_anchor(&acm->delayed);
1da177e4 1301
997ea58e 1302 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1303 if (!buf) {
255ab56c 1304 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1305 goto alloc_fail2;
1306 }
1307 acm->ctrl_buffer = buf;
1308
884b600f 1309 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1310 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1311 goto alloc_fail4;
1312 }
1da177e4
LT		 1313
1314 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1315 if (!acm->ctrlurb) {
255ab56c 1316 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1317 goto alloc_fail5;
1318 }
86478944 1319 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1320 struct acm_rb *rb = &(acm->read_buffers[i]);
1321 struct urb *urb;
61a87adf 1322
74f5e1ba
JH		 1323 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1324 &rb->dma);
1325 if (!rb->base) {
1326 dev_err(&intf->dev, "out of memory "
1327 "(read bufs usb_alloc_coherent)\n");
1328 goto alloc_fail6;
1329 }
088c64f8
JH		 1330 rb->index = i;
1331 rb->instance = acm;
74f5e1ba 1332
088c64f8
JH		 1333 urb = usb_alloc_urb(0, GFP_KERNEL);
1334 if (!urb) {
255ab56c 1335 dev_err(&intf->dev,
6e47e069 1336 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1337 goto alloc_fail6;
61a87adf 1338 }
088c64f8
JH		 1339 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1340 urb->transfer_dma = rb->dma;
1341 if (acm->is_int_ep) {
1342 usb_fill_int_urb(urb, acm->dev,
1343 acm->rx_endpoint,
1344 rb->base,
1345 acm->readsize,
1346 acm_read_bulk_callback, rb,
1347 acm->bInterval);
1348 } else {
1349 usb_fill_bulk_urb(urb, acm->dev,
1350 acm->rx_endpoint,
1351 rb->base,
1352 acm->readsize,
1353 acm_read_bulk_callback, rb);
1354 }
61a87adf 1355
088c64f8
JH		 1356 acm->read_urbs[i] = urb;
1357 __set_bit(i, &acm->read_urbs_free);
61a87adf 1358 }
6e47e069 1359 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1360 struct acm_wb *snd = &(acm->wb[i]);
1361
6e47e069
AC		 1362 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1363 if (snd->urb == NULL) {
255ab56c 1364 dev_err(&intf->dev,
59d7fec7 1365 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1366 goto alloc_fail7;
e4cf3aa8
DE		 1367 }
1368
5186ffee
AL		 1369 if (usb_endpoint_xfer_int(epwrite))
1370 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1371 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1372 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1373 else
1374 usb_fill_bulk_urb(snd->urb, usb_dev,
1375 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1376 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1377 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1378 snd->instance = acm;
1da177e4
LT		 1379 }
1380
6e47e069 1381 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1382
1383 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1384 if (i < 0)
74f5e1ba 1385 goto alloc_fail7;
c4cabd28
ON		 1386
1387 if (cfd) { /* export the country data */
1388 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1389 if (!acm->country_codes)
1390 goto skip_countries;
1391 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1392 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1393 cfd->bLength - 4);
c4cabd28
ON		 1394 acm->country_rel_date = cfd->iCountryCodeRelDate;
1395
1396 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1397 if (i < 0) {
1398 kfree(acm->country_codes);
e7c8e860
JL		 1399 acm->country_codes = NULL;
1400 acm->country_code_size = 0;
c4cabd28
ON		 1401 goto skip_countries;
1402 }
1403
6e47e069
AC		 1404 i = device_create_file(&intf->dev,
1405 &dev_attr_iCountryCodeRelDate);
c4cabd28 1406 if (i < 0) {
c2572b78 1407 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1408 kfree(acm->country_codes);
e7c8e860
JL		 1409 acm->country_codes = NULL;
1410 acm->country_code_size = 0;
c4cabd28
ON		 1411 goto skip_countries;
1412 }
1413 }
1414
1415skip_countries:
6e47e069 1416 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1417 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1418 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1419 /* works around buggy devices */
d102e78f 1420 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1421 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1422 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1423
1da177e4
LT		 1424 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1425
1426 acm_set_control(acm, acm->ctrlout);
1427
1428 acm->line.dwDTERate = cpu_to_le32(9600);
1429 acm->line.bDataBits = 8;
1430 acm_set_line(acm, &acm->line);
1431
1432 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1433 usb_set_intfdata(data_interface, acm);
1da177e4 1434
83ef344a 1435 usb_get_intf(control_interface);
c93d8195 1436 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1437 &control_interface->dev);
c93d8195
AK		 1438 if (IS_ERR(tty_dev)) {
1439 rv = PTR_ERR(tty_dev);
1440 goto alloc_fail8;
1441 }
1da177e4 1442
c4cabd28 1443 return 0;
c93d8195
AK		 1444alloc_fail8:
1445 if (acm->country_codes) {
1446 device_remove_file(&acm->control->dev,
1447 &dev_attr_wCountryCodes);
1448 device_remove_file(&acm->control->dev,
1449 &dev_attr_iCountryCodeRelDate);
1450 }
1451 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1452alloc_fail7:
c93d8195 1453 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1454 for (i = 0; i < ACM_NW; i++)
1455 usb_free_urb(acm->wb[i].urb);
c2572b78 1456alloc_fail6:
86478944 1457 for (i = 0; i < num_rx_buf; i++)
088c64f8 1458 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1459 acm_read_buffers_free(acm);
1da177e4
LT		 1460 usb_free_urb(acm->ctrlurb);
1461alloc_fail5:
884b600f 1462 acm_write_buffers_free(acm);
1da177e4 1463alloc_fail4:
997ea58e 1464 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1465alloc_fail2:
7fb57a01 1466 acm_release_minor(acm);
1da177e4
LT		 1467 kfree(acm);
1468alloc_fail:
c93d8195 1469 return rv;
1da177e4
LT		 1470}
1471
1365baf7
ON		 1472static void stop_data_traffic(struct acm *acm)
1473{
1474 int i;
a5cc7ef9
JH		 1475
1476 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1477
1365baf7 1478 usb_kill_urb(acm->ctrlurb);
6e47e069 1479 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1480 usb_kill_urb(acm->wb[i].urb);
1365baf7 1481 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1482 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1483
1484 cancel_work_sync(&acm->work);
1485}
1486
1da177e4
LT		 1487static void acm_disconnect(struct usb_interface *intf)
1488{
c4cabd28 1489 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1490 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1491 struct tty_struct *tty;
7fb57a01
HS		 1492 int i;
1493
1494 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1495
672c4e18
DB		 1496 /* sibling interface is already cleaning up */
1497 if (!acm)
86067eea 1498 return;
672c4e18 1499
7fb57a01
HS		 1500 mutex_lock(&acm->mutex);
1501 acm->disconnected = true;
6e47e069 1502 if (acm->country_codes) {
74da5d68
AS		 1503 device_remove_file(&acm->control->dev,
1504 &dev_attr_wCountryCodes);
1505 device_remove_file(&acm->control->dev,
1506 &dev_attr_iCountryCodeRelDate);
c4cabd28 1507 }
5a6a62bd 1508 wake_up_all(&acm->wioctl);
74da5d68 1509 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1510 usb_set_intfdata(acm->control, NULL);
1511 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1512 mutex_unlock(&acm->mutex);
1513
1514 tty = tty_port_tty_get(&acm->port);
1515 if (tty) {
1516 tty_vhangup(tty);
1517 tty_kref_put(tty);
1518 }
1da177e4 1519
1365baf7 1520 stop_data_traffic(acm);
1da177e4 1521
cb25505f
JH		 1522 tty_unregister_device(acm_tty_driver, acm->minor);
1523
7fb57a01
HS		 1524 usb_free_urb(acm->ctrlurb);
1525 for (i = 0; i < ACM_NW; i++)
1526 usb_free_urb(acm->wb[i].urb);
1527 for (i = 0; i < acm->rx_buflimit; i++)
1528 usb_free_urb(acm->read_urbs[i]);
884b600f 1529 acm_write_buffers_free(acm);
7fb57a01 1530 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1531 acm_read_buffers_free(acm);
1da177e4 1532
a2bfb4a3
ON		 1533 if (!acm->combined_interfaces)
1534 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1535 acm->data : acm->control);
1da177e4 1536
7fb57a01 1537 tty_port_put(&acm->port);
1da177e4
LT		 1538}
1539
35758589 1540#ifdef CONFIG_PM
1365baf7
ON		 1541static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1542{
1543 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1544 int cnt;
1545
bbf0cb3e 1546 spin_lock_irq(&acm->write_lock);
5b1b0b81 1547 if (PMSG_IS_AUTO(message)) {
5a345c20 1548 if (acm->transmitting) {
bbf0cb3e 1549 spin_unlock_irq(&acm->write_lock);
11ea859d 1550 return -EBUSY;
5a345c20 1551 }
11ea859d 1552 }
11ea859d 1553 cnt = acm->susp_count++;
bbf0cb3e 1554 spin_unlock_irq(&acm->write_lock);
1365baf7 1555
11ea859d 1556 if (cnt)
1365baf7 1557 return 0;
1365baf7 1558
ed797074 1559 stop_data_traffic(acm);
1365baf7 1560
1365baf7
ON		 1561 return 0;
1562}
1563
1564static int acm_resume(struct usb_interface *intf)
1565{
1566 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1567 struct urb *urb;
1365baf7
ON		 1568 int rv = 0;
1569
bbf0cb3e 1570 spin_lock_irq(&acm->write_lock);
11ea859d 1571
e144ed28
JH		 1572 if (--acm->susp_count)
1573 goto out;
1365baf7 1574
7fb57a01 1575 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1576 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1577
140cb81a
JH		 1578 for (;;) {
1579 urb = usb_get_from_anchor(&acm->delayed);
1580 if (!urb)
1581 break;
1582
1583 acm_start_wb(acm, urb->context);
97d35f95
ON		 1584 }
1585
1586 /*
1587 * delayed error checking because we must
1588 * do the write path at all cost
1589 */
1365baf7 1590 if (rv < 0)
e144ed28 1591 goto out;
1365baf7 1592
e144ed28 1593 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1594 }
e144ed28 1595out:
bbf0cb3e 1596 spin_unlock_irq(&acm->write_lock);
1365baf7 1597
1365baf7
ON		 1598 return rv;
1599}
35758589 1600
a91b0c50
FL		 1601static int acm_reset_resume(struct usb_interface *intf)
1602{
1603 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1604
aa27a094
JS		 1605 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1606 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1607
a91b0c50
FL		 1608 return acm_resume(intf);
1609}
1610
35758589 1611#endif /* CONFIG_PM */
c1479a92
AT		 1612
1613#define NOKIA_PCSUITE_ACM_INFO(x) \
1614 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1615 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1616 USB_CDC_ACM_PROTO_VENDOR)
1617
4035e456
TG		 1618#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1619 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1620 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1621 USB_CDC_ACM_PROTO_VENDOR)
1622
1da177e4
LT		 1623/*
1624 * USB driver structure.
1625 */
1626
6ef4852b 1627static const struct usb_device_id acm_ids[] = {
1da177e4 1628 /* quirky and broken devices */
3b59d16c
DC		 1629 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1630 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1631 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1632 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1633 },
b0e2a705
AA		 1634 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1635 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1636 },
0f9c7b4a
AL		 1637 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1638 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1639 },
8753e65e
MO		 1640 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1641 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1642 },
91a9c921
CM		 1643 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1644 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1645 },
7abcf20b
AC		 1646 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1647 .driver_info = SINGLE_RX_URB,
1648 },
86478944
ON		 1649 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1650 .driver_info = SINGLE_RX_URB, /* firmware bug */
1651 },
3dd2ae81
ON		 1652 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1653 .driver_info = SINGLE_RX_URB, /* firmware bug */
1654 },
9be8456c
ON		 1655 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1656 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1657 },
6149ed5e
IM		 1658 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1659 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1660 },
c8fd2c37
ES		 1661 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1662 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1663 },
c89c60e9
AC		 1664 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1665 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1666 },
cab98a0a
XK		 1667 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1668 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1669 },
155df65a
DT		 1670 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1671 },
6abff5dc
KH		 1672 /* Motorola H24 HSPA module: */
1673 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1674 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1675 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1676 },
1677 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1678 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1679 },
1680 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1681 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1682 },
1683 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1684 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1685 },
1686 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1687 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1688 },
1689 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1690 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1691 },
1692 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1693 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1694 },
6abff5dc 1695
c332b4e1
AR		 1696 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1697 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1698 data interface instead of
1699 communications interface.
1700 Maybe we should define a new
1701 quirk for this. */
1702 },
e7d491a1
JCR		 1703 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1704 .driver_info = NO_UNION_NORMAL,
1705 },
036915a7
DL		 1706 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1707 .driver_info = NO_UNION_NORMAL,
1708 },
1f17c502
KK		 1709 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1710 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1711 },
c3baa19b
RN		 1712 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1713 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1714 },
9be8456c 1715
c1479a92
AT		 1716 /* Nokia S60 phones expose two ACM channels. The first is
1717 * a modem and is picked up by the standard AT-command
1718 * information below. The second is 'vendor-specific' but
1719 * is treated as a serial device at the S60 end, so we want
1720 * to expose it on Linux too. */
1721 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1722 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1723 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1724 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1725 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1727 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1728 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1729 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1733 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1736 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1737 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1738 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1739 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1740 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1741 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1742 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1743 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1744 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1746 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1747 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1749 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1750 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1751 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1752 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1753 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1754 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1755 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1756 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1757 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1762 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1763 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1764 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1765 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1766 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1768 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1770 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1772 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1773 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1775 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1776 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1778 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1779
65e52f41
DP		 1780 /* Support for Owen devices */
1781 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1782
c1479a92
AT		 1783 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1784
7c5d8c39 1785 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1786 { USB_DEVICE(0x0694, 0xff00),
1787 .driver_info = NOT_A_MODEM,
7893afc0 1788 },
7c5d8c39 1789
fd5054c1
ES		 1790 /* Support for Droids MuIn LCD */
1791 { USB_DEVICE(0x04d8, 0x000b),
1792 .driver_info = NO_DATA_INTERFACE,
1793 },
1794
16142655
DT		 1795#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1796 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1797 .driver_info = IGNORE_DEVICE,
1798 },
1799 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1800 .driver_info = IGNORE_DEVICE,
1801 },
1802#endif
1803
5b239f0a
PC		 1804 /* control interfaces without any protocol set */
1805 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1806 USB_CDC_PROTO_NONE) },
1807
1da177e4
LT		 1808 /* control interfaces with various AT-command sets */
1809 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1810 USB_CDC_ACM_PROTO_AT_V25TER) },
1811 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1812 USB_CDC_ACM_PROTO_AT_PCCA101) },
1813 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1814 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1815 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1816 USB_CDC_ACM_PROTO_AT_GSM) },
1817 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1818 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1819 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1820 USB_CDC_ACM_PROTO_AT_CDMA) },
1821
1da177e4
LT		 1822 { }
1823};
1824
6e47e069 1825MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1826
1827static struct usb_driver acm_driver = {
1da177e4
LT		 1828 .name = "cdc_acm",
1829 .probe = acm_probe,
1830 .disconnect = acm_disconnect,
35758589 1831#ifdef CONFIG_PM
1365baf7
ON		 1832 .suspend = acm_suspend,
1833 .resume = acm_resume,
a91b0c50 1834 .reset_resume = acm_reset_resume,
35758589 1835#endif
1da177e4 1836 .id_table = acm_ids,
35758589 1837#ifdef CONFIG_PM
1365baf7 1838 .supports_autosuspend = 1,
35758589 1839#endif
e1f12eb6 1840 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1841};
1842
1843/*
1844 * TTY driver structures.
1845 */
1846
b68e31d0 1847static const struct tty_operations acm_ops = {
7fb57a01 1848 .install = acm_tty_install,
1da177e4
LT		 1849 .open = acm_tty_open,
1850 .close = acm_tty_close,
7fb57a01 1851 .cleanup = acm_tty_cleanup,
10077d4a 1852 .hangup = acm_tty_hangup,
1da177e4
LT		 1853 .write = acm_tty_write,
1854 .write_room = acm_tty_write_room,
1855 .ioctl = acm_tty_ioctl,
1856 .throttle = acm_tty_throttle,
1857 .unthrottle = acm_tty_unthrottle,
1858 .chars_in_buffer = acm_tty_chars_in_buffer,
1859 .break_ctl = acm_tty_break_ctl,
1860 .set_termios = acm_tty_set_termios,
1861 .tiocmget = acm_tty_tiocmget,
1862 .tiocmset = acm_tty_tiocmset,
1863};
1864
1865/*
1866 * Init / exit.
1867 */
1868
1869static int __init acm_init(void)
1870{
1871 int retval;
1872 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1873 if (!acm_tty_driver)
1874 return -ENOMEM;
1da177e4
LT		 1875 acm_tty_driver->driver_name = "acm",
1876 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1877 acm_tty_driver->major = ACM_TTY_MAJOR,
1878 acm_tty_driver->minor_start = 0,
1879 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1880 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1881 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1882 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1883 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1884 HUPCL | CLOCAL;
1da177e4
LT		 1885 tty_set_operations(acm_tty_driver, &acm_ops);
1886
1887 retval = tty_register_driver(acm_tty_driver);
1888 if (retval) {
1889 put_tty_driver(acm_tty_driver);
1890 return retval;
1891 }
1892
1893 retval = usb_register(&acm_driver);
1894 if (retval) {
1895 tty_unregister_driver(acm_tty_driver);
1896 put_tty_driver(acm_tty_driver);
1897 return retval;
1898 }
1899
a2c7b935 1900 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1901
1902 return 0;
1903}
1904
1905static void __exit acm_exit(void)
1906{
1907 usb_deregister(&acm_driver);
1908 tty_unregister_driver(acm_tty_driver);
1909 put_tty_driver(acm_tty_driver);
1910}
1911
1912module_init(acm_init);
1913module_exit(acm_exit);
1914
6e47e069
AC		 1915MODULE_AUTHOR(DRIVER_AUTHOR);
1916MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1917MODULE_LICENSE("GPL");
e766aeb8 1918MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)