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USB: cdc-acm: fix runtime PM for control messages
[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
JH		 430 acm->throttled = acm->throttle_req;
431 if (!acm->throttled && !acm->susp_count) {
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;
509
510 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7
ON		 511
512 mutex_lock(&acm->mutex);
7fb57a01
HS		 513 if (acm->disconnected)
514 goto disconnected;
515
516 retval = usb_autopm_get_interface(acm->control);
517 if (retval)
518 goto error_get_interface;
519
520 /*
521 * FIXME: Why do we need this? Allocating 64K of physically contiguous
522 * memory is really nasty...
523 */
524 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
525 acm->control->needs_remote_wakeup = 1;
1365baf7 526
1da177e4
LT		 527 acm->ctrlurb->dev = acm->dev;
528 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
a5cc7ef9
JH		 529 dev_err(&acm->control->dev,
530 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
070c0b17 531 usb_autopm_put_interface(acm->control);
7fb57a01 532 goto error_submit_urb;
1da177e4
LT		 533 }
534
7fb57a01
HS		 535 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
536 if (acm_set_control(acm, acm->ctrlout) < 0 &&
070c0b17
AK		 537 (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
538 usb_autopm_put_interface(acm->control);
7fb57a01 539 goto error_set_control;
070c0b17 540 }
10077d4a 541
11ea859d 542 usb_autopm_put_interface(acm->control);
1da177e4 543
6c4707f3
OM		 544 /*
545 * Unthrottle device in case the TTY was closed while throttled.
546 */
547 spin_lock_irq(&acm->read_lock);
548 acm->throttled = 0;
549 acm->throttle_req = 0;
550 spin_unlock_irq(&acm->read_lock);
551
088c64f8 552 if (acm_submit_read_urbs(acm, GFP_KERNEL))
7fb57a01 553 goto error_submit_read_urbs;
2b626dc1 554
1365baf7 555 mutex_unlock(&acm->mutex);
1da177e4 556
7fb57a01
HS		 557 return 0;
558
559error_submit_read_urbs:
560 acm->ctrlout = 0;
561 acm_set_control(acm, acm->ctrlout);
562error_set_control:
563 usb_kill_urb(acm->ctrlurb);
564error_submit_urb:
7fb57a01
HS		 565error_get_interface:
566disconnected:
567 mutex_unlock(&acm->mutex);
568 return retval;
1da177e4
LT		 569}
570
7fb57a01 571static void acm_port_destruct(struct tty_port *port)
83ef344a 572{
7fb57a01
HS		 573 struct acm *acm = container_of(port, struct acm, port);
574
575 dev_dbg(&acm->control->dev, "%s\n", __func__);
61a87adf 576
7fb57a01 577 acm_release_minor(acm);
83ef344a 578 usb_put_intf(acm->control);
c4cabd28 579 kfree(acm->country_codes);
83ef344a 580 kfree(acm);
581}
582
7fb57a01 583static void acm_port_shutdown(struct tty_port *port)
10077d4a 584{
7fb57a01 585 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 586 struct urb *urb;
587 struct acm_wb *wb;
dab54c9f
JH		 588 int i;
589
7fb57a01
HS		 590 dev_dbg(&acm->control->dev, "%s\n", __func__);
591
592 mutex_lock(&acm->mutex);
593 if (!acm->disconnected) {
10077d4a
AC		 594 usb_autopm_get_interface(acm->control);
595 acm_set_control(acm, acm->ctrlout = 0);
140cb81a
JH		 596
597 for (;;) {
598 urb = usb_get_from_anchor(&acm->delayed);
599 if (!urb)
600 break;
601 wb = urb->context;
602 wb->use = 0;
603 usb_autopm_put_interface_async(acm->control);
604 }
605
10077d4a
AC		 606 usb_kill_urb(acm->ctrlurb);
607 for (i = 0; i < ACM_NW; i++)
608 usb_kill_urb(acm->wb[i].urb);
dab54c9f 609 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 610 usb_kill_urb(acm->read_urbs[i]);
10077d4a
AC		 611 acm->control->needs_remote_wakeup = 0;
612 usb_autopm_put_interface(acm->control);
613 }
7fb57a01
HS		 614 mutex_unlock(&acm->mutex);
615}
616
617static void acm_tty_cleanup(struct tty_struct *tty)
618{
619 struct acm *acm = tty->driver_data;
620 dev_dbg(&acm->control->dev, "%s\n", __func__);
621 tty_port_put(&acm->port);
10077d4a
AC		 622}
623
624static void acm_tty_hangup(struct tty_struct *tty)
625{
626 struct acm *acm = tty->driver_data;
7fb57a01 627 dev_dbg(&acm->control->dev, "%s\n", __func__);
10077d4a 628 tty_port_hangup(&acm->port);
10077d4a
AC		 629}
630
1da177e4
LT		 631static void acm_tty_close(struct tty_struct *tty, struct file *filp)
632{
633 struct acm *acm = tty->driver_data;
7fb57a01
HS		 634 dev_dbg(&acm->control->dev, "%s\n", __func__);
635 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 636}
637
6e47e069
AC		 638static int acm_tty_write(struct tty_struct *tty,
639 const unsigned char *buf, int count)
1da177e4
LT		 640{
641 struct acm *acm = tty->driver_data;
642 int stat;
884b600f
ON		 643 unsigned long flags;
644 int wbn;
645 struct acm_wb *wb;
646
1da177e4
LT		 647 if (!count)
648 return 0;
649
5e9e75f8 650 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
a5cc7ef9 651
884b600f 652 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 653 wbn = acm_wb_alloc(acm);
654 if (wbn < 0) {
884b600f 655 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 656 return 0;
657 }
658 wb = &acm->wb[wbn];
1da177e4 659
71c2fb03
GKH		 660 if (!acm->dev) {
661 wb->use = 0;
662 spin_unlock_irqrestore(&acm->write_lock, flags);
663 return -ENODEV;
664 }
665
884b600f 666 count = (count > acm->writesize) ? acm->writesize : count;
5e9e75f8 667 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
884b600f
ON		 668 memcpy(wb->buf, buf, count);
669 wb->len = count;
71c2fb03
GKH		 670
671 usb_autopm_get_interface_async(acm->control);
672 if (acm->susp_count) {
140cb81a 673 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 674 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 675 return count;
71c2fb03
GKH		 676 }
677 usb_mark_last_busy(acm->dev);
678
679 stat = acm_start_wb(acm, wb);
884b600f 680 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 681
6e47e069 682 if (stat < 0)
1da177e4 683 return stat;
1da177e4
LT		 684 return count;
685}
686
687static int acm_tty_write_room(struct tty_struct *tty)
688{
689 struct acm *acm = tty->driver_data;
884b600f
ON		 690 /*
691 * Do not let the line discipline to know that we have a reserve,
692 * or it might get too enthusiastic.
693 */
934da463 694 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 695}
696
697static int acm_tty_chars_in_buffer(struct tty_struct *tty)
698{
699 struct acm *acm = tty->driver_data;
7fb57a01
HS		 700 /*
701 * if the device was unplugged then any remaining characters fell out
702 * of the connector ;)
703 */
704 if (acm->disconnected)
23198fda 705 return 0;
884b600f
ON		 706 /*
707 * This is inaccurate (overcounts), but it works.
708 */
86478944 709 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 710}
711
712static void acm_tty_throttle(struct tty_struct *tty)
713{
714 struct acm *acm = tty->driver_data;
088c64f8 715
088c64f8
JH		 716 spin_lock_irq(&acm->read_lock);
717 acm->throttle_req = 1;
718 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 719}
720
721static void acm_tty_unthrottle(struct tty_struct *tty)
722{
723 struct acm *acm = tty->driver_data;
088c64f8
JH		 724 unsigned int was_throttled;
725
088c64f8
JH		 726 spin_lock_irq(&acm->read_lock);
727 was_throttled = acm->throttled;
728 acm->throttled = 0;
729 acm->throttle_req = 0;
730 spin_unlock_irq(&acm->read_lock);
731
732 if (was_throttled)
733 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 734}
735
9e98966c 736static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 737{
738 struct acm *acm = tty->driver_data;
9e98966c 739 int retval;
7fb57a01 740
9e98966c
AC		 741 retval = acm_send_break(acm, state ? 0xffff : 0);
742 if (retval < 0)
a5cc7ef9
JH		 743 dev_dbg(&acm->control->dev, "%s - send break failed\n",
744 __func__);
9e98966c 745 return retval;
1da177e4
LT		 746}
747
60b33c13 748static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 749{
750 struct acm *acm = tty->driver_data;
751
1da177e4
LT		 752 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
753 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
754 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
755 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
756 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
757 TIOCM_CTS;
758}
759
20b9d177 760static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 761 unsigned int set, unsigned int clear)
762{
763 struct acm *acm = tty->driver_data;
764 unsigned int newctrl;
765
1da177e4 766 newctrl = acm->ctrlout;
6e47e069
AC		 767 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
768 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
769 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
770 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 771
772 newctrl = (newctrl & ~clear) | set;
773
774 if (acm->ctrlout == newctrl)
775 return 0;
776 return acm_set_control(acm, acm->ctrlout = newctrl);
777}
778
18c75720
ON		 779static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
780{
781 struct serial_struct tmp;
782
783 if (!info)
784 return -EINVAL;
785
786 memset(&tmp, 0, sizeof(tmp));
787 tmp.flags = ASYNC_LOW_LATENCY;
788 tmp.xmit_fifo_size = acm->writesize;
789 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 790 tmp.close_delay = acm->port.close_delay / 10;
791 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
792 ASYNC_CLOSING_WAIT_NONE :
793 acm->port.closing_wait / 10;
18c75720
ON		 794
795 if (copy_to_user(info, &tmp, sizeof(tmp)))
796 return -EFAULT;
797 else
798 return 0;
799}
800
ba2d8ce9
DW		 801static int set_serial_info(struct acm *acm,
802 struct serial_struct __user *newinfo)
803{
804 struct serial_struct new_serial;
805 unsigned int closing_wait, close_delay;
806 int retval = 0;
807
808 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
809 return -EFAULT;
810
811 close_delay = new_serial.close_delay * 10;
812 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
813 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
814
815 mutex_lock(&acm->port.mutex);
816
817 if (!capable(CAP_SYS_ADMIN)) {
818 if ((close_delay != acm->port.close_delay) ||
819 (closing_wait != acm->port.closing_wait))
820 retval = -EPERM;
821 else
822 retval = -EOPNOTSUPP;
823 } else {
824 acm->port.close_delay = close_delay;
825 acm->port.closing_wait = closing_wait;
826 }
827
828 mutex_unlock(&acm->port.mutex);
829 return retval;
830}
831
5a6a62bd
ON		 832static int wait_serial_change(struct acm *acm, unsigned long arg)
833{
834 int rv = 0;
835 DECLARE_WAITQUEUE(wait, current);
836 struct async_icount old, new;
837
838 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
839 return -EINVAL;
840 do {
841 spin_lock_irq(&acm->read_lock);
842 old = acm->oldcount;
843 new = acm->iocount;
844 acm->oldcount = new;
845 spin_unlock_irq(&acm->read_lock);
846
847 if ((arg & TIOCM_DSR) &&
848 old.dsr != new.dsr)
849 break;
850 if ((arg & TIOCM_CD) &&
851 old.dcd != new.dcd)
852 break;
853 if ((arg & TIOCM_RI) &&
854 old.rng != new.rng)
855 break;
856
857 add_wait_queue(&acm->wioctl, &wait);
858 set_current_state(TASK_INTERRUPTIBLE);
859 schedule();
860 remove_wait_queue(&acm->wioctl, &wait);
861 if (acm->disconnected) {
862 if (arg & TIOCM_CD)
863 break;
864 else
865 rv = -ENODEV;
866 } else {
867 if (signal_pending(current))
868 rv = -ERESTARTSYS;
869 }
870 } while (!rv);
871
872
873
874 return rv;
875}
876
797ef137
ON		 877static int get_serial_usage(struct acm *acm,
878 struct serial_icounter_struct __user *count)
879{
880 struct serial_icounter_struct icount;
881 int rv = 0;
882
883 memset(&icount, 0, sizeof(icount));
884 icount.dsr = acm->iocount.dsr;
885 icount.rng = acm->iocount.rng;
886 icount.dcd = acm->iocount.dcd;
887 icount.frame = acm->iocount.frame;
888 icount.overrun = acm->iocount.overrun;
889 icount.parity = acm->iocount.parity;
890 icount.brk = acm->iocount.brk;
891
892 if (copy_to_user(count, &icount, sizeof(icount)) > 0)
893 rv = -EFAULT;
894
895 return rv;
896}
897
6caa76b7 898static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 899 unsigned int cmd, unsigned long arg)
1da177e4 900{
18c75720
ON		 901 struct acm *acm = tty->driver_data;
902 int rv = -ENOIOCTLCMD;
903
904 switch (cmd) {
905 case TIOCGSERIAL: /* gets serial port data */
906 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 907 break;
908 case TIOCSSERIAL:
909 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 910 break;
5a6a62bd 911 case TIOCMIWAIT:
8fdbeb26
ON		 912 rv = usb_autopm_get_interface(acm->control);
913 if (rv < 0) {
914 rv = -EIO;
915 break;
916 }
5a6a62bd 917 rv = wait_serial_change(acm, arg);
8fdbeb26 918 usb_autopm_put_interface(acm->control);
5a6a62bd 919 break;
797ef137
ON		 920 case TIOCGICOUNT:
921 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
922 break;
18c75720
ON		 923 }
924
925 return rv;
1da177e4
LT		 926}
927
6e47e069
AC		 928static void acm_tty_set_termios(struct tty_struct *tty,
929 struct ktermios *termios_old)
1da177e4
LT		 930{
931 struct acm *acm = tty->driver_data;
adc8d746 932 struct ktermios *termios = &tty->termios;
1da177e4
LT		 933 struct usb_cdc_line_coding newline;
934 int newctrl = acm->ctrlout;
935
9b80fee1 936 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 937 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
938 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 939 (termios->c_cflag & PARODD ? 1 : 2) +
940 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 941 switch (termios->c_cflag & CSIZE) {
942 case CS5:
943 newline.bDataBits = 5;
944 break;
945 case CS6:
946 newline.bDataBits = 6;
947 break;
948 case CS7:
949 newline.bDataBits = 7;
950 break;
951 case CS8:
952 default:
953 newline.bDataBits = 8;
954 break;
955 }
6e47e069 956 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 957 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
958
959 if (!newline.dwDTERate) {
960 newline.dwDTERate = acm->line.dwDTERate;
961 newctrl &= ~ACM_CTRL_DTR;
6e47e069
AC		 962 } else
963 newctrl |= ACM_CTRL_DTR;
1da177e4
LT		 964
965 if (newctrl != acm->ctrlout)
966 acm_set_control(acm, acm->ctrlout = newctrl);
967
968 if (memcmp(&acm->line, &newline, sizeof newline)) {
969 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 970 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
971 __func__,
972 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 973 newline.bCharFormat, newline.bParityType,
974 newline.bDataBits);
975 acm_set_line(acm, &acm->line);
976 }
977}
978
7fb57a01
HS		 979static const struct tty_port_operations acm_port_ops = {
980 .shutdown = acm_port_shutdown,
981 .activate = acm_port_activate,
982 .destruct = acm_port_destruct,
983};
984
1da177e4
LT		 985/*
986 * USB probe and disconnect routines.
987 */
988
830f4021 989/* Little helpers: write/read buffers free */
884b600f
ON		 990static void acm_write_buffers_free(struct acm *acm)
991{
992 int i;
993 struct acm_wb *wb;
a496c64f 994 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
884b600f 995
6e47e069 996 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
997ea58e 997 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 998}
999
830f4021
ON		 1000static void acm_read_buffers_free(struct acm *acm)
1001{
1002 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
dab54c9f 1003 int i;
830f4021 1004
dab54c9f 1005 for (i = 0; i < acm->rx_buflimit; i++)
997ea58e 1006 usb_free_coherent(usb_dev, acm->readsize,
088c64f8 1007 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1008}
1009
884b600f
ON		 1010/* Little helper: write buffers allocate */
1011static int acm_write_buffers_alloc(struct acm *acm)
1012{
1013 int i;
1014 struct acm_wb *wb;
1015
86478944 1016 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1017 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1018 &wb->dmah);
1019 if (!wb->buf) {
1020 while (i != 0) {
1021 --i;
1022 --wb;
997ea58e 1023 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1024 wb->buf, wb->dmah);
1025 }
1026 return -ENOMEM;
1027 }
1028 }
1029 return 0;
1030}
1031
10077d4a
AC		 1032static int acm_probe(struct usb_interface *intf,
1033 const struct usb_device_id *id)
1da177e4
LT		 1034{
1035 struct usb_cdc_union_desc *union_header = NULL;
c4cabd28 1036 struct usb_cdc_country_functional_desc *cfd = NULL;
c6dbf554 1037 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1038 int buflen = intf->altsetting->extralen;
1039 struct usb_interface *control_interface;
1040 struct usb_interface *data_interface;
a2bfb4a3
ON		 1041 struct usb_endpoint_descriptor *epctrl = NULL;
1042 struct usb_endpoint_descriptor *epread = NULL;
1043 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4
LT		 1044 struct usb_device *usb_dev = interface_to_usbdev(intf);
1045 struct acm *acm;
1046 int minor;
6e47e069 1047 int ctrlsize, readsize;
1da177e4
LT		 1048 u8 *buf;
1049 u8 ac_management_function = 0;
1050 u8 call_management_function = 0;
1051 int call_interface_num = -1;
fd5054c1 1052 int data_interface_num = -1;
1da177e4 1053 unsigned long quirks;
86478944 1054 int num_rx_buf;
61a87adf 1055 int i;
a2bfb4a3 1056 int combined_interfaces = 0;
c93d8195
AK		 1057 struct device *tty_dev;
1058 int rv = -ENOMEM;
1da177e4 1059
86478944 1060 /* normal quirks */
1da177e4 1061 quirks = (unsigned long)id->driver_info;
16142655
DT		 1062
1063 if (quirks == IGNORE_DEVICE)
1064 return -ENODEV;
1065
86478944
ON		 1066 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1067
1068 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1069 if (quirks == NO_UNION_NORMAL) {
1070 data_interface = usb_ifnum_to_if(usb_dev, 1);
1071 control_interface = usb_ifnum_to_if(usb_dev, 0);
1072 goto skip_normal_probe;
1073 }
6e47e069 1074
1da177e4
LT		 1075 /* normal probing*/
1076 if (!buffer) {
9908a32e 1077 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1078 return -EINVAL;
1079 }
1080
1081 if (!buflen) {
577045c0
TG		 1082 if (intf->cur_altsetting->endpoint &&
1083 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1084 intf->cur_altsetting->endpoint->extra) {
1085 dev_dbg(&intf->dev,
1086 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1087 buflen = intf->cur_altsetting->endpoint->extralen;
1088 buffer = intf->cur_altsetting->endpoint->extra;
1089 } else {
9908a32e
GKH		 1090 dev_err(&intf->dev,
1091 "Zero length descriptor references\n");
1da177e4
LT		 1092 return -EINVAL;
1093 }
1094 }
1095
1096 while (buflen > 0) {
6e47e069 1097 if (buffer[1] != USB_DT_CS_INTERFACE) {
9908a32e 1098 dev_err(&intf->dev, "skipping garbage\n");
1da177e4
LT		 1099 goto next_desc;
1100 }
1101
6e47e069
AC		 1102 switch (buffer[2]) {
1103 case USB_CDC_UNION_TYPE: /* we've found it */
1104 if (union_header) {
1105 dev_err(&intf->dev, "More than one "
1106 "union descriptor, skipping ...\n");
1107 goto next_desc;
1da177e4 1108 }
6e47e069
AC		 1109 union_header = (struct usb_cdc_union_desc *)buffer;
1110 break;
1111 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1112 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1113 break;
1114 case USB_CDC_HEADER_TYPE: /* maybe check version */
1115 break; /* for now we ignore it */
1116 case USB_CDC_ACM_TYPE:
1117 ac_management_function = buffer[3];
1118 break;
1119 case USB_CDC_CALL_MANAGEMENT_TYPE:
1120 call_management_function = buffer[3];
1121 call_interface_num = buffer[4];
02f824ac 1122 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
6e47e069
AC		 1123 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1124 break;
1125 default:
1126 /* there are LOTS more CDC descriptors that
1127 * could legitimately be found here.
1128 */
1129 dev_dbg(&intf->dev, "Ignoring descriptor: "
1130 "type %02x, length %d\n",
1131 buffer[2], buffer[0]);
1132 break;
1133 }
1da177e4
LT		 1134next_desc:
1135 buflen -= buffer[0];
1136 buffer += buffer[0];
1137 }
1138
1139 if (!union_header) {
1140 if (call_interface_num > 0) {
6e47e069 1141 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1
ES		 1142 /* quirks for Droids MuIn LCD */
1143 if (quirks & NO_DATA_INTERFACE)
1144 data_interface = usb_ifnum_to_if(usb_dev, 0);
1145 else
1146 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1da177e4
LT		 1147 control_interface = intf;
1148 } else {
a2bfb4a3
ON		 1149 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1150 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1151 return -ENODEV;
1152 } else {
1153 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1154 combined_interfaces = 1;
1155 control_interface = data_interface = intf;
1156 goto look_for_collapsed_interface;
1157 }
1da177e4
LT		 1158 }
1159 } else {
1160 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1161 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1162 if (!control_interface || !data_interface) {
6e47e069 1163 dev_dbg(&intf->dev, "no interfaces\n");
1da177e4
LT		 1164 return -ENODEV;
1165 }
1166 }
6e47e069 1167
1da177e4 1168 if (data_interface_num != call_interface_num)
6e47e069 1169 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1170
a2bfb4a3
ON		 1171 if (control_interface == data_interface) {
1172 /* some broken devices designed for windows work this way */
1173 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1174 combined_interfaces = 1;
1175 /* a popular other OS doesn't use it */
1176 quirks |= NO_CAP_LINE;
1177 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1178 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1179 return -EINVAL;
1180 }
1181look_for_collapsed_interface:
1182 for (i = 0; i < 3; i++) {
1183 struct usb_endpoint_descriptor *ep;
1184 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1185
1186 if (usb_endpoint_is_int_in(ep))
1187 epctrl = ep;
1188 else if (usb_endpoint_is_bulk_out(ep))
1189 epwrite = ep;
1190 else if (usb_endpoint_is_bulk_in(ep))
1191 epread = ep;
1192 else
1193 return -EINVAL;
1194 }
1195 if (!epctrl || !epread || !epwrite)
1196 return -ENODEV;
1197 else
1198 goto made_compressed_probe;
1199 }
1200
1da177e4
LT		 1201skip_normal_probe:
1202
1203 /*workaround for switched interfaces */
6e47e069
AC		 1204 if (data_interface->cur_altsetting->desc.bInterfaceClass
1205 != CDC_DATA_INTERFACE_TYPE) {
1206 if (control_interface->cur_altsetting->desc.bInterfaceClass
1207 == CDC_DATA_INTERFACE_TYPE) {
1da177e4 1208 struct usb_interface *t;
6e47e069
AC		 1209 dev_dbg(&intf->dev,
1210 "Your device has switched interfaces.\n");
1da177e4
LT		 1211 t = control_interface;
1212 control_interface = data_interface;
1213 data_interface = t;
1214 } else {
1215 return -EINVAL;
1216 }
1217 }
74da5d68
AS		 1218
1219 /* Accept probe requests only for the control interface */
a2bfb4a3 1220 if (!combined_interfaces && intf != control_interface)
74da5d68 1221 return -ENODEV;
6e47e069 1222
a2bfb4a3
ON		 1223 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1224 /* valid in this context */
6e47e069 1225 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1226 return -EBUSY;
1227 }
1228
1229
99f347ca
SS		 1230 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1231 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1232 return -EINVAL;
1233
1234 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1235 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1236 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1237
1238
1239 /* workaround for switched endpoints */
45aea704 1240 if (!usb_endpoint_dir_in(epread)) {
1da177e4
LT		 1241 /* descriptors are swapped */
1242 struct usb_endpoint_descriptor *t;
6e47e069
AC		 1243 dev_dbg(&intf->dev,
1244 "The data interface has switched endpoints\n");
1da177e4
LT		 1245 t = epread;
1246 epread = epwrite;
1247 epwrite = t;
1248 }
a2bfb4a3 1249made_compressed_probe:
a5cc7ef9 1250 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1251
6e47e069
AC		 1252 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1253 if (acm == NULL) {
255ab56c 1254 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1da177e4
LT		 1255 goto alloc_fail;
1256 }
1da177e4 1257
7fb57a01
HS		 1258 minor = acm_alloc_minor(acm);
1259 if (minor == ACM_TTY_MINORS) {
1260 dev_err(&intf->dev, "no more free acm devices\n");
1261 kfree(acm);
1262 return -ENODEV;
1263 }
1264
29cc8897
KM		 1265 ctrlsize = usb_endpoint_maxp(epctrl);
1266 readsize = usb_endpoint_maxp(epread) *
6e47e069 1267 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1268 acm->combined_interfaces = combined_interfaces;
29cc8897 1269 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1270 acm->control = control_interface;
1271 acm->data = data_interface;
1272 acm->minor = minor;
1273 acm->dev = usb_dev;
1274 acm->ctrl_caps = ac_management_function;
a2bfb4a3
ON		 1275 if (quirks & NO_CAP_LINE)
1276 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1277 acm->ctrlsize = ctrlsize;
1278 acm->readsize = readsize;
86478944 1279 acm->rx_buflimit = num_rx_buf;
c4028958 1280 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1281 init_waitqueue_head(&acm->wioctl);
884b600f 1282 spin_lock_init(&acm->write_lock);
61a87adf 1283 spin_lock_init(&acm->read_lock);
1365baf7 1284 mutex_init(&acm->mutex);
61a87adf 1285 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
cf7fdd57
ON		 1286 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1287 if (acm->is_int_ep)
1288 acm->bInterval = epread->bInterval;
739e0285
AC		 1289 tty_port_init(&acm->port);
1290 acm->port.ops = &acm_port_ops;
140cb81a 1291 init_usb_anchor(&acm->delayed);
1da177e4 1292
997ea58e 1293 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1da177e4 1294 if (!buf) {
255ab56c 1295 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1da177e4
LT		 1296 goto alloc_fail2;
1297 }
1298 acm->ctrl_buffer = buf;
1299
884b600f 1300 if (acm_write_buffers_alloc(acm) < 0) {
255ab56c 1301 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1da177e4
LT		 1302 goto alloc_fail4;
1303 }
1da177e4
LT		 1304
1305 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1306 if (!acm->ctrlurb) {
255ab56c 1307 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1da177e4
LT		 1308 goto alloc_fail5;
1309 }
86478944 1310 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1311 struct acm_rb *rb = &(acm->read_buffers[i]);
1312 struct urb *urb;
61a87adf 1313
74f5e1ba
JH		 1314 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1315 &rb->dma);
1316 if (!rb->base) {
1317 dev_err(&intf->dev, "out of memory "
1318 "(read bufs usb_alloc_coherent)\n");
1319 goto alloc_fail6;
1320 }
088c64f8
JH		 1321 rb->index = i;
1322 rb->instance = acm;
74f5e1ba 1323
088c64f8
JH		 1324 urb = usb_alloc_urb(0, GFP_KERNEL);
1325 if (!urb) {
255ab56c 1326 dev_err(&intf->dev,
6e47e069 1327 "out of memory (read urbs usb_alloc_urb)\n");
c2572b78 1328 goto alloc_fail6;
61a87adf 1329 }
088c64f8
JH		 1330 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1331 urb->transfer_dma = rb->dma;
1332 if (acm->is_int_ep) {
1333 usb_fill_int_urb(urb, acm->dev,
1334 acm->rx_endpoint,
1335 rb->base,
1336 acm->readsize,
1337 acm_read_bulk_callback, rb,
1338 acm->bInterval);
1339 } else {
1340 usb_fill_bulk_urb(urb, acm->dev,
1341 acm->rx_endpoint,
1342 rb->base,
1343 acm->readsize,
1344 acm_read_bulk_callback, rb);
1345 }
61a87adf 1346
088c64f8
JH		 1347 acm->read_urbs[i] = urb;
1348 __set_bit(i, &acm->read_urbs_free);
61a87adf 1349 }
6e47e069 1350 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1351 struct acm_wb *snd = &(acm->wb[i]);
1352
6e47e069
AC		 1353 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1354 if (snd->urb == NULL) {
255ab56c 1355 dev_err(&intf->dev,
59d7fec7 1356 "out of memory (write urbs usb_alloc_urb)\n");
74f5e1ba 1357 goto alloc_fail7;
e4cf3aa8
DE		 1358 }
1359
5186ffee
AL		 1360 if (usb_endpoint_xfer_int(epwrite))
1361 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1362 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1363 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1364 else
1365 usb_fill_bulk_urb(snd->urb, usb_dev,
1366 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1367 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8
DE		 1368 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1369 snd->instance = acm;
1da177e4
LT		 1370 }
1371
6e47e069 1372 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1373
1374 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1375 if (i < 0)
74f5e1ba 1376 goto alloc_fail7;
c4cabd28
ON		 1377
1378 if (cfd) { /* export the country data */
1379 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1380 if (!acm->country_codes)
1381 goto skip_countries;
1382 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1383 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1384 cfd->bLength - 4);
c4cabd28
ON		 1385 acm->country_rel_date = cfd->iCountryCodeRelDate;
1386
1387 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1388 if (i < 0) {
1389 kfree(acm->country_codes);
e7c8e860
JL		 1390 acm->country_codes = NULL;
1391 acm->country_code_size = 0;
c4cabd28
ON		 1392 goto skip_countries;
1393 }
1394
6e47e069
AC		 1395 i = device_create_file(&intf->dev,
1396 &dev_attr_iCountryCodeRelDate);
c4cabd28 1397 if (i < 0) {
c2572b78 1398 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1399 kfree(acm->country_codes);
e7c8e860
JL		 1400 acm->country_codes = NULL;
1401 acm->country_code_size = 0;
c4cabd28
ON		 1402 goto skip_countries;
1403 }
1404 }
1405
1406skip_countries:
6e47e069 1407 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1408 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1409 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1410 /* works around buggy devices */
d102e78f 1411 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1412 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1413 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1414
1da177e4
LT		 1415 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1416
1417 acm_set_control(acm, acm->ctrlout);
1418
1419 acm->line.dwDTERate = cpu_to_le32(9600);
1420 acm->line.bDataBits = 8;
1421 acm_set_line(acm, &acm->line);
1422
1423 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1424 usb_set_intfdata(data_interface, acm);
1da177e4 1425
83ef344a 1426 usb_get_intf(control_interface);
c93d8195 1427 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1428 &control_interface->dev);
c93d8195
AK		 1429 if (IS_ERR(tty_dev)) {
1430 rv = PTR_ERR(tty_dev);
1431 goto alloc_fail8;
1432 }
1da177e4 1433
c4cabd28 1434 return 0;
c93d8195
AK		 1435alloc_fail8:
1436 if (acm->country_codes) {
1437 device_remove_file(&acm->control->dev,
1438 &dev_attr_wCountryCodes);
1439 device_remove_file(&acm->control->dev,
1440 &dev_attr_iCountryCodeRelDate);
1441 }
1442 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1443alloc_fail7:
c93d8195 1444 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1445 for (i = 0; i < ACM_NW; i++)
1446 usb_free_urb(acm->wb[i].urb);
c2572b78 1447alloc_fail6:
86478944 1448 for (i = 0; i < num_rx_buf; i++)
088c64f8 1449 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1450 acm_read_buffers_free(acm);
1da177e4
LT		 1451 usb_free_urb(acm->ctrlurb);
1452alloc_fail5:
884b600f 1453 acm_write_buffers_free(acm);
1da177e4 1454alloc_fail4:
997ea58e 1455 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1456alloc_fail2:
7fb57a01 1457 acm_release_minor(acm);
1da177e4
LT		 1458 kfree(acm);
1459alloc_fail:
c93d8195 1460 return rv;
1da177e4
LT		 1461}
1462
1365baf7
ON		 1463static void stop_data_traffic(struct acm *acm)
1464{
1465 int i;
a5cc7ef9
JH		 1466
1467 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365baf7 1468
1365baf7 1469 usb_kill_urb(acm->ctrlurb);
6e47e069 1470 for (i = 0; i < ACM_NW; i++)
e4cf3aa8 1471 usb_kill_urb(acm->wb[i].urb);
1365baf7 1472 for (i = 0; i < acm->rx_buflimit; i++)
088c64f8 1473 usb_kill_urb(acm->read_urbs[i]);
1365baf7
ON		 1474
1475 cancel_work_sync(&acm->work);
1476}
1477
1da177e4
LT		 1478static void acm_disconnect(struct usb_interface *intf)
1479{
c4cabd28 1480 struct acm *acm = usb_get_intfdata(intf);
1da177e4 1481 struct usb_device *usb_dev = interface_to_usbdev(intf);
10077d4a 1482 struct tty_struct *tty;
7fb57a01
HS		 1483 int i;
1484
1485 dev_dbg(&intf->dev, "%s\n", __func__);
1da177e4 1486
672c4e18
DB		 1487 /* sibling interface is already cleaning up */
1488 if (!acm)
86067eea 1489 return;
672c4e18 1490
7fb57a01
HS		 1491 mutex_lock(&acm->mutex);
1492 acm->disconnected = true;
6e47e069 1493 if (acm->country_codes) {
74da5d68
AS		 1494 device_remove_file(&acm->control->dev,
1495 &dev_attr_wCountryCodes);
1496 device_remove_file(&acm->control->dev,
1497 &dev_attr_iCountryCodeRelDate);
c4cabd28 1498 }
5a6a62bd 1499 wake_up_all(&acm->wioctl);
74da5d68 1500 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1501 usb_set_intfdata(acm->control, NULL);
1502 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1503 mutex_unlock(&acm->mutex);
1504
1505 tty = tty_port_tty_get(&acm->port);
1506 if (tty) {
1507 tty_vhangup(tty);
1508 tty_kref_put(tty);
1509 }
1da177e4 1510
1365baf7 1511 stop_data_traffic(acm);
1da177e4 1512
cb25505f
JH		 1513 tty_unregister_device(acm_tty_driver, acm->minor);
1514
7fb57a01
HS		 1515 usb_free_urb(acm->ctrlurb);
1516 for (i = 0; i < ACM_NW; i++)
1517 usb_free_urb(acm->wb[i].urb);
1518 for (i = 0; i < acm->rx_buflimit; i++)
1519 usb_free_urb(acm->read_urbs[i]);
884b600f 1520 acm_write_buffers_free(acm);
7fb57a01 1521 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1522 acm_read_buffers_free(acm);
1da177e4 1523
a2bfb4a3
ON		 1524 if (!acm->combined_interfaces)
1525 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1526 acm->data : acm->control);
1da177e4 1527
7fb57a01 1528 tty_port_put(&acm->port);
1da177e4
LT		 1529}
1530
35758589 1531#ifdef CONFIG_PM
1365baf7
ON		 1532static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1533{
1534 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1535 int cnt;
1536
5a345c20
JH		 1537 spin_lock_irq(&acm->read_lock);
1538 spin_lock(&acm->write_lock);
5b1b0b81 1539 if (PMSG_IS_AUTO(message)) {
5a345c20
JH		 1540 if (acm->transmitting) {
1541 spin_unlock(&acm->write_lock);
1542 spin_unlock_irq(&acm->read_lock);
11ea859d 1543 return -EBUSY;
5a345c20 1544 }
11ea859d 1545 }
11ea859d
ON		 1546 cnt = acm->susp_count++;
1547 spin_unlock(&acm->write_lock);
1548 spin_unlock_irq(&acm->read_lock);
1365baf7 1549
11ea859d 1550 if (cnt)
1365baf7 1551 return 0;
1365baf7 1552
7fb57a01 1553 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1365baf7
ON		 1554 stop_data_traffic(acm);
1555
1365baf7
ON		 1556 return 0;
1557}
1558
1559static int acm_resume(struct usb_interface *intf)
1560{
1561 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1562 struct urb *urb;
1365baf7
ON		 1563 int rv = 0;
1564
11ea859d 1565 spin_lock_irq(&acm->read_lock);
e144ed28 1566 spin_lock(&acm->write_lock);
11ea859d 1567
e144ed28
JH		 1568 if (--acm->susp_count)
1569 goto out;
1365baf7 1570
7fb57a01 1571 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
e144ed28 1572 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1573
140cb81a
JH		 1574 for (;;) {
1575 urb = usb_get_from_anchor(&acm->delayed);
1576 if (!urb)
1577 break;
1578
1579 acm_start_wb(acm, urb->context);
97d35f95
ON		 1580 }
1581
1582 /*
1583 * delayed error checking because we must
1584 * do the write path at all cost
1585 */
1365baf7 1586 if (rv < 0)
e144ed28 1587 goto out;
1365baf7 1588
e144ed28 1589 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1590 }
e144ed28
JH		 1591out:
1592 spin_unlock(&acm->write_lock);
1593 spin_unlock_irq(&acm->read_lock);
1365baf7 1594
1365baf7
ON		 1595 return rv;
1596}
35758589 1597
a91b0c50
FL		 1598static int acm_reset_resume(struct usb_interface *intf)
1599{
1600 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1601
aa27a094
JS		 1602 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1603 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1604
a91b0c50
FL		 1605 return acm_resume(intf);
1606}
1607
35758589 1608#endif /* CONFIG_PM */
c1479a92
AT		 1609
1610#define NOKIA_PCSUITE_ACM_INFO(x) \
1611 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1612 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1613 USB_CDC_ACM_PROTO_VENDOR)
1614
4035e456
TG		 1615#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1616 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1617 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1618 USB_CDC_ACM_PROTO_VENDOR)
1619
1da177e4
LT		 1620/*
1621 * USB driver structure.
1622 */
1623
6ef4852b 1624static const struct usb_device_id acm_ids[] = {
1da177e4 1625 /* quirky and broken devices */
3b59d16c
DC		 1626 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1627 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1628 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1629 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1630 },
b0e2a705
AA		 1631 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1632 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1633 },
0f9c7b4a
AL		 1634 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1635 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1636 },
8753e65e
MO		 1637 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1638 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1639 },
91a9c921
CM		 1640 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1641 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1642 },
7abcf20b
AC		 1643 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1644 .driver_info = SINGLE_RX_URB,
1645 },
86478944
ON		 1646 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1647 .driver_info = SINGLE_RX_URB, /* firmware bug */
1648 },
3dd2ae81
ON		 1649 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1650 .driver_info = SINGLE_RX_URB, /* firmware bug */
1651 },
9be8456c
ON		 1652 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1653 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1654 },
6149ed5e
IM		 1655 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1656 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1657 },
c8fd2c37
ES		 1658 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1659 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1660 },
c89c60e9
AC		 1661 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1662 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1663 },
cab98a0a
XK		 1664 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1665 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1666 },
155df65a
DT		 1667 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1668 },
6abff5dc
KH		 1669 /* Motorola H24 HSPA module: */
1670 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1671 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1672 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1673 },
1674 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1675 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1676 },
1677 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1678 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1679 },
1680 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1681 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1682 },
1683 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1684 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1685 },
1686 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1687 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1688 },
1689 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1690 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1691 },
6abff5dc 1692
c332b4e1
AR		 1693 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1694 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1695 data interface instead of
1696 communications interface.
1697 Maybe we should define a new
1698 quirk for this. */
1699 },
e7d491a1
JCR		 1700 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1701 .driver_info = NO_UNION_NORMAL,
1702 },
036915a7
DL		 1703 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1704 .driver_info = NO_UNION_NORMAL,
1705 },
1f17c502
KK		 1706 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1707 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1708 },
c3baa19b
RN		 1709 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1710 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1711 },
9be8456c 1712
c1479a92
AT		 1713 /* Nokia S60 phones expose two ACM channels. The first is
1714 * a modem and is picked up by the standard AT-command
1715 * information below. The second is 'vendor-specific' but
1716 * is treated as a serial device at the S60 end, so we want
1717 * to expose it on Linux too. */
1718 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1719 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1720 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1721 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1722 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1723 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1724 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1725 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1726 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1727 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1728 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1729 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1730 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1731 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1732 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1733 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1734 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1735 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1736 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1737 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1738 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1739 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1740 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1741 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1742 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1743 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1744 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1745 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1746 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1747 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1748 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1749 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1750 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1751 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1753 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1754 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1755 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1756 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1757 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1760 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1761 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1762 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1764 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1765 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1766 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1768 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1769 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1770 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1771 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1772 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1773 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1774 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1775 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1776
65e52f41
DP		 1777 /* Support for Owen devices */
1778 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1779
c1479a92
AT		 1780 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1781
7c5d8c39 1782 /* Support Lego NXT using pbLua firmware */
ce126644
JC		 1783 { USB_DEVICE(0x0694, 0xff00),
1784 .driver_info = NOT_A_MODEM,
7893afc0 1785 },
7c5d8c39 1786
fd5054c1
ES		 1787 /* Support for Droids MuIn LCD */
1788 { USB_DEVICE(0x04d8, 0x000b),
1789 .driver_info = NO_DATA_INTERFACE,
1790 },
1791
16142655
DT		 1792#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1793 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1794 .driver_info = IGNORE_DEVICE,
1795 },
1796 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1797 .driver_info = IGNORE_DEVICE,
1798 },
1799#endif
1800
5b239f0a
PC		 1801 /* control interfaces without any protocol set */
1802 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1803 USB_CDC_PROTO_NONE) },
1804
1da177e4
LT		 1805 /* control interfaces with various AT-command sets */
1806 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1807 USB_CDC_ACM_PROTO_AT_V25TER) },
1808 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1809 USB_CDC_ACM_PROTO_AT_PCCA101) },
1810 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1811 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1812 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1813 USB_CDC_ACM_PROTO_AT_GSM) },
1814 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1815 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1816 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1817 USB_CDC_ACM_PROTO_AT_CDMA) },
1818
1da177e4
LT		 1819 { }
1820};
1821
6e47e069 1822MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1823
1824static struct usb_driver acm_driver = {
1da177e4
LT		 1825 .name = "cdc_acm",
1826 .probe = acm_probe,
1827 .disconnect = acm_disconnect,
35758589 1828#ifdef CONFIG_PM
1365baf7
ON		 1829 .suspend = acm_suspend,
1830 .resume = acm_resume,
a91b0c50 1831 .reset_resume = acm_reset_resume,
35758589 1832#endif
1da177e4 1833 .id_table = acm_ids,
35758589 1834#ifdef CONFIG_PM
1365baf7 1835 .supports_autosuspend = 1,
35758589 1836#endif
e1f12eb6 1837 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1838};
1839
1840/*
1841 * TTY driver structures.
1842 */
1843
b68e31d0 1844static const struct tty_operations acm_ops = {
7fb57a01 1845 .install = acm_tty_install,
1da177e4
LT		 1846 .open = acm_tty_open,
1847 .close = acm_tty_close,
7fb57a01 1848 .cleanup = acm_tty_cleanup,
10077d4a 1849 .hangup = acm_tty_hangup,
1da177e4
LT		 1850 .write = acm_tty_write,
1851 .write_room = acm_tty_write_room,
1852 .ioctl = acm_tty_ioctl,
1853 .throttle = acm_tty_throttle,
1854 .unthrottle = acm_tty_unthrottle,
1855 .chars_in_buffer = acm_tty_chars_in_buffer,
1856 .break_ctl = acm_tty_break_ctl,
1857 .set_termios = acm_tty_set_termios,
1858 .tiocmget = acm_tty_tiocmget,
1859 .tiocmset = acm_tty_tiocmset,
1860};
1861
1862/*
1863 * Init / exit.
1864 */
1865
1866static int __init acm_init(void)
1867{
1868 int retval;
1869 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1870 if (!acm_tty_driver)
1871 return -ENOMEM;
1da177e4
LT		 1872 acm_tty_driver->driver_name = "acm",
1873 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1874 acm_tty_driver->major = ACM_TTY_MAJOR,
1875 acm_tty_driver->minor_start = 0,
1876 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1877 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1878 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1879 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1880 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1881 HUPCL | CLOCAL;
1da177e4
LT		 1882 tty_set_operations(acm_tty_driver, &acm_ops);
1883
1884 retval = tty_register_driver(acm_tty_driver);
1885 if (retval) {
1886 put_tty_driver(acm_tty_driver);
1887 return retval;
1888 }
1889
1890 retval = usb_register(&acm_driver);
1891 if (retval) {
1892 tty_unregister_driver(acm_tty_driver);
1893 put_tty_driver(acm_tty_driver);
1894 return retval;
1895 }
1896
a2c7b935 1897 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1898
1899 return 0;
1900}
1901
1902static void __exit acm_exit(void)
1903{
1904 usb_deregister(&acm_driver);
1905 tty_unregister_driver(acm_tty_driver);
1906 put_tty_driver(acm_tty_driver);
1907}
1908
1909module_init(acm_init);
1910module_exit(acm_exit);
1911
6e47e069
AC		 1912MODULE_AUTHOR(DRIVER_AUTHOR);
1913MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1914MODULE_LICENSE("GPL");
e766aeb8 1915MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)