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cdc-acm: refactor killing urbs
[linux-2.6-block.git] / drivers / usb / class / cdc-acm.c
CommitLineData
1da177e4
LT		 1/*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
a2531293 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
1da177e4
LT		 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
61a87adf 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
088c64f8 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
1da177e4
LT		 11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
1da177e4
LT		 16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31#undef DEBUG
e5fbab51 32#undef VERBOSE_DEBUG
1da177e4
LT		 33
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/init.h>
37#include <linux/slab.h>
38#include <linux/tty.h>
7af25b4b 39#include <linux/serial.h>
1da177e4
LT		 40#include <linux/tty_driver.h>
41#include <linux/tty_flip.h>
42#include <linux/module.h>
4186ecf8 43#include <linux/mutex.h>
10077d4a 44#include <linux/uaccess.h>
1da177e4 45#include <linux/usb.h>
a8c28f23 46#include <linux/usb/cdc.h>
1da177e4
LT		 47#include <asm/byteorder.h>
48#include <asm/unaligned.h>
6cb4f4df 49#include <linux/idr.h>
61a87adf 50#include <linux/list.h>
1da177e4
LT		 51
52#include "cdc-acm.h"
53
e5fbab51 54
088c64f8 55#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
1da177e4
LT		 56#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
57
58static struct usb_driver acm_driver;
59static struct tty_driver *acm_tty_driver;
1da177e4 60
6cb4f4df
JH		 61static DEFINE_IDR(acm_minors);
62static DEFINE_MUTEX(acm_minors_lock);
1da177e4 63
24cb4502
JP		 64static void acm_tty_set_termios(struct tty_struct *tty,
65 struct ktermios *termios_old);
66
7fb57a01 67/*
6cb4f4df 68 * acm_minors accessors
7fb57a01 69 */
1da177e4 70
7fb57a01 71/*
6cb4f4df 72 * Look up an ACM structure by minor. If found and not disconnected, increment
7fb57a01
HS		 73 * its refcount and return it with its mutex held.
74 */
6cb4f4df 75static struct acm *acm_get_by_minor(unsigned int minor)
7fb57a01
HS		 76{
77 struct acm *acm;
78
6cb4f4df
JH		 79 mutex_lock(&acm_minors_lock);
80 acm = idr_find(&acm_minors, minor);
7fb57a01
HS		 81 if (acm) {
82 mutex_lock(&acm->mutex);
83 if (acm->disconnected) {
84 mutex_unlock(&acm->mutex);
85 acm = NULL;
86 } else {
87 tty_port_get(&acm->port);
88 mutex_unlock(&acm->mutex);
89 }
90 }
6cb4f4df 91 mutex_unlock(&acm_minors_lock);
7fb57a01
HS		 92 return acm;
93}
94
95/*
96 * Try to find an available minor number and if found, associate it with 'acm'.
97 */
98static int acm_alloc_minor(struct acm *acm)
99{
100 int minor;
101
6cb4f4df
JH		 102 mutex_lock(&acm_minors_lock);
103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
104 mutex_unlock(&acm_minors_lock);
7fb57a01
HS		 105
106 return minor;
107}
108
109/* Release the minor number associated with 'acm'. */
110static void acm_release_minor(struct acm *acm)
111{
6cb4f4df
JH		 112 mutex_lock(&acm_minors_lock);
113 idr_remove(&acm_minors, acm->minor);
114 mutex_unlock(&acm_minors_lock);
7fb57a01 115}
739e0285 116
1da177e4
LT		 117/*
118 * Functions for ACM control messages.
119 */
120
6e47e069
AC		 121static int acm_ctrl_msg(struct acm *acm, int request, int value,
122 void *buf, int len)
1da177e4 123{
bae3f4c5
JH		 124 int retval;
125
126 retval = usb_autopm_get_interface(acm->control);
127 if (retval)
128 return retval;
129
130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
1da177e4
LT		 131 request, USB_RT_ACM, value,
132 acm->control->altsetting[0].desc.bInterfaceNumber,
133 buf, len, 5000);
bae3f4c5 134
a5cc7ef9 135 dev_dbg(&acm->control->dev,
90744af8
LM		 136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
137 __func__, request, value, len, retval);
bae3f4c5
JH		 138
139 usb_autopm_put_interface(acm->control);
140
1da177e4
LT		 141 return retval < 0 ? retval : 0;
142}
143
144/* devices aren't required to support these requests.
145 * the cdc acm descriptor tells whether they do...
146 */
2a8cdfde
JH		 147static inline int acm_set_control(struct acm *acm, int control)
148{
149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
150 return -EOPNOTSUPP;
151
152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
153 control, NULL, 0);
154}
155
1da177e4
LT		 156#define acm_set_line(acm, line) \
157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
158#define acm_send_break(acm, ms) \
159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
160
ba8c931d
LM		 161static void acm_kill_urbs(struct acm *acm)
162{
163 int i;
164
165 usb_kill_urb(acm->ctrlurb);
166 for (i = 0; i < ACM_NW; i++)
167 usb_kill_urb(acm->wb[i].urb);
168 for (i = 0; i < acm->rx_buflimit; i++)
169 usb_kill_urb(acm->read_urbs[i]);
170}
171
884b600f
ON		 172/*
173 * Write buffer management.
174 * All of these assume proper locks taken by the caller.
175 */
176
177static int acm_wb_alloc(struct acm *acm)
178{
179 int i, wbn;
180 struct acm_wb *wb;
181
e4cf3aa8 182 wbn = 0;
884b600f
ON		 183 i = 0;
184 for (;;) {
185 wb = &acm->wb[wbn];
186 if (!wb->use) {
187 wb->use = 1;
188 return wbn;
189 }
86478944
ON		 190 wbn = (wbn + 1) % ACM_NW;
191 if (++i >= ACM_NW)
884b600f
ON		 192 return -1;
193 }
194}
195
884b600f
ON		 196static int acm_wb_is_avail(struct acm *acm)
197{
198 int i, n;
e5fbab51 199 unsigned long flags;
884b600f 200
86478944 201 n = ACM_NW;
e5fbab51 202 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069 203 for (i = 0; i < ACM_NW; i++)
86478944 204 n -= acm->wb[i].use;
e5fbab51 205 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 206 return n;
207}
208
884b600f 209/*
ad0b65ef 210 * Finish write. Caller must hold acm->write_lock
884b600f 211 */
e4cf3aa8 212static void acm_write_done(struct acm *acm, struct acm_wb *wb)
884b600f 213{
e4cf3aa8 214 wb->use = 0;
11ea859d 215 acm->transmitting--;
97d35f95 216 usb_autopm_put_interface_async(acm->control);
884b600f
ON		 217}
218
219/*
220 * Poke write.
11ea859d
ON		 221 *
222 * the caller is responsible for locking
884b600f 223 */
11ea859d
ON		 224
225static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
226{
227 int rc;
228
229 acm->transmitting++;
230
231 wb->urb->transfer_buffer = wb->buf;
232 wb->urb->transfer_dma = wb->dmah;
233 wb->urb->transfer_buffer_length = wb->len;
234 wb->urb->dev = acm->dev;
235
6e47e069
AC		 236 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
237 if (rc < 0) {
a5cc7ef9
JH		 238 dev_err(&acm->data->dev,
239 "%s - usb_submit_urb(write bulk) failed: %d\n",
240 __func__, rc);
11ea859d
ON		 241 acm_write_done(acm, wb);
242 }
243 return rc;
244}
245
c4cabd28
ON		 246/*
247 * attributes exported through sysfs
248 */
249static ssize_t show_caps
250(struct device *dev, struct device_attribute *attr, char *buf)
251{
252 struct usb_interface *intf = to_usb_interface(dev);
253 struct acm *acm = usb_get_intfdata(intf);
254
255 return sprintf(buf, "%d", acm->ctrl_caps);
256}
257static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
258
259static ssize_t show_country_codes
260(struct device *dev, struct device_attribute *attr, char *buf)
261{
262 struct usb_interface *intf = to_usb_interface(dev);
263 struct acm *acm = usb_get_intfdata(intf);
264
265 memcpy(buf, acm->country_codes, acm->country_code_size);
266 return acm->country_code_size;
267}
268
269static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
270
271static ssize_t show_country_rel_date
272(struct device *dev, struct device_attribute *attr, char *buf)
273{
274 struct usb_interface *intf = to_usb_interface(dev);
275 struct acm *acm = usb_get_intfdata(intf);
276
277 return sprintf(buf, "%d", acm->country_rel_date);
278}
884b600f 279
c4cabd28 280static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
1da177e4
LT		 281/*
282 * Interrupt handlers for various ACM device responses
283 */
284
285/* control interface reports status changes with "interrupt" transfers */
7d12e780 286static void acm_ctrl_irq(struct urb *urb)
1da177e4
LT		 287{
288 struct acm *acm = urb->context;
289 struct usb_cdc_notification *dr = urb->transfer_buffer;
290 unsigned char *data;
291 int newctrl;
5a6a62bd 292 int difference;
185d4058
GKH		 293 int retval;
294 int status = urb->status;
1da177e4 295
185d4058 296 switch (status) {
1da177e4
LT		 297 case 0:
298 /* success */
299 break;
300 case -ECONNRESET:
301 case -ENOENT:
302 case -ESHUTDOWN:
303 /* this urb is terminated, clean up */
a5cc7ef9 304 dev_dbg(&acm->control->dev,
90744af8
LM		 305 "%s - urb shutting down with status: %d\n",
306 __func__, status);
1da177e4
LT		 307 return;
308 default:
a5cc7ef9 309 dev_dbg(&acm->control->dev,
90744af8
LM		 310 "%s - nonzero urb status received: %d\n",
311 __func__, status);
1da177e4
LT		 312 goto exit;
313 }
314
7e7797e7
JH		 315 usb_mark_last_busy(acm->dev);
316
1da177e4
LT		 317 data = (unsigned char *)(dr + 1);
318 switch (dr->bNotificationType) {
6e47e069 319 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
90744af8
LM		 320 dev_dbg(&acm->control->dev,
321 "%s - network connection: %d\n", __func__, dr->wValue);
6e47e069 322 break;
1da177e4 323
6e47e069 324 case USB_CDC_NOTIFY_SERIAL_STATE:
6e47e069 325 newctrl = get_unaligned_le16(data);
1da177e4 326
aa27a094 327 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
90744af8
LM		 328 dev_dbg(&acm->control->dev,
329 "%s - calling hangup\n", __func__);
aa27a094 330 tty_port_tty_hangup(&acm->port, false);
6e47e069 331 }
1da177e4 332
5a6a62bd
ON		 333 difference = acm->ctrlin ^ newctrl;
334 spin_lock(&acm->read_lock);
6e47e069 335 acm->ctrlin = newctrl;
5a6a62bd
ON		 336 acm->oldcount = acm->iocount;
337
338 if (difference & ACM_CTRL_DSR)
339 acm->iocount.dsr++;
340 if (difference & ACM_CTRL_BRK)
341 acm->iocount.brk++;
342 if (difference & ACM_CTRL_RI)
343 acm->iocount.rng++;
344 if (difference & ACM_CTRL_DCD)
345 acm->iocount.dcd++;
346 if (difference & ACM_CTRL_FRAMING)
347 acm->iocount.frame++;
348 if (difference & ACM_CTRL_PARITY)
349 acm->iocount.parity++;
350 if (difference & ACM_CTRL_OVERRUN)
351 acm->iocount.overrun++;
352 spin_unlock(&acm->read_lock);
353
354 if (difference)
355 wake_up_all(&acm->wioctl);
1da177e4 356
5a6a62bd 357 break;
1da177e4 358
6e47e069 359 default:
a5cc7ef9
JH		 360 dev_dbg(&acm->control->dev,
361 "%s - unknown notification %d received: index %d "
362 "len %d data0 %d data1 %d\n",
363 __func__,
6e47e069
AC		 364 dr->bNotificationType, dr->wIndex,
365 dr->wLength, data[0], data[1]);
366 break;
1da177e4
LT		 367 }
368exit:
6e47e069 369 retval = usb_submit_urb(urb, GFP_ATOMIC);
6c8074e9 370 if (retval && retval != -EPERM)
90744af8
LM		 371 dev_err(&acm->control->dev,
372 "%s - usb_submit_urb failed: %d\n", __func__, retval);
1da177e4
LT		 373}
374
088c64f8 375static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
1da177e4 376{
088c64f8 377 int res;
185d4058 378
088c64f8
JH		 379 if (!test_and_clear_bit(index, &acm->read_urbs_free))
380 return 0;
1da177e4 381
088c64f8
JH		 382 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
383 if (res) {
384 if (res != -EPERM) {
385 dev_err(&acm->data->dev,
90744af8
LM		 386 "urb %d failed submission with %d\n",
387 index, res);
088c64f8
JH		 388 }
389 set_bit(index, &acm->read_urbs_free);
390 return res;
46e75075
ON		 391 } else {
392 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index);
11ea859d 393 }
1da177e4 394
088c64f8
JH		 395 return 0;
396}
1da177e4 397
088c64f8
JH		 398static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
399{
400 int res;
401 int i;
61a87adf 402
088c64f8
JH		 403 for (i = 0; i < acm->rx_buflimit; ++i) {
404 res = acm_submit_read_urb(acm, i, mem_flags);
405 if (res)
406 return res;
86478944 407 }
088c64f8
JH		 408
409 return 0;
1da177e4
LT		 410}
411
088c64f8 412static void acm_process_read_urb(struct acm *acm, struct urb *urb)
1da177e4 413{
088c64f8 414 if (!urb->actual_length)
ca79b7b4 415 return;
61a87adf 416
05c7cd39
JS		 417 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
418 urb->actual_length);
2e124b4a 419 tty_flip_buffer_push(&acm->port);
088c64f8 420}
10077d4a 421
088c64f8
JH		 422static void acm_read_bulk_callback(struct urb *urb)
423{
424 struct acm_rb *rb = urb->context;
425 struct acm *acm = rb->instance;
426 unsigned long flags;
36e59e0d 427 int status = urb->status;
61a87adf 428
efbe27b3 429 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n",
90744af8 430 rb->index, urb->actual_length, status);
61a87adf 431
088c64f8 432 if (!acm->dev) {
36e59e0d 433 set_bit(rb->index, &acm->read_urbs_free);
088c64f8
JH		 434 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
435 return;
436 }
61a87adf 437
4132cd02 438 if (status) {
36e59e0d 439 set_bit(rb->index, &acm->read_urbs_free);
19454462
LB		 440 if ((status != -ENOENT) || (urb->actual_length == 0))
441 return;
61a87adf 442 }
4a8ee505
JH		 443
444 usb_mark_last_busy(acm->dev);
445
088c64f8 446 acm_process_read_urb(acm, urb);
36e59e0d
ON		 447 /*
448 * Unthrottle may run on another CPU which needs to see events
449 * in the same order. Submission has an implict barrier
450 */
451 smp_mb__before_atomic();
452 set_bit(rb->index, &acm->read_urbs_free);
088c64f8
JH		 453
454 /* throttle device if requested by tty */
11ea859d 455 spin_lock_irqsave(&acm->read_lock, flags);
088c64f8 456 acm->throttled = acm->throttle_req;
bbf0cb3e 457 if (!acm->throttled) {
088c64f8
JH		 458 spin_unlock_irqrestore(&acm->read_lock, flags);
459 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
460 } else {
461 spin_unlock_irqrestore(&acm->read_lock, flags);
462 }
1da177e4
LT		 463}
464
465/* data interface wrote those outgoing bytes */
7d12e780 466static void acm_write_bulk(struct urb *urb)
1da177e4 467{
cdc97792 468 struct acm_wb *wb = urb->context;
e5fbab51 469 struct acm *acm = wb->instance;
ad0b65ef 470 unsigned long flags;
4132cd02 471 int status = urb->status;
1da177e4 472
4132cd02 473 if (status || (urb->actual_length != urb->transfer_buffer_length))
efbe27b3 474 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n",
e5fbab51
DB		 475 urb->actual_length,
476 urb->transfer_buffer_length,
4132cd02 477 status);
1da177e4 478
ad0b65ef 479 spin_lock_irqsave(&acm->write_lock, flags);
e4cf3aa8 480 acm_write_done(acm, wb);
ad0b65ef 481 spin_unlock_irqrestore(&acm->write_lock, flags);
99823f45 482 schedule_work(&acm->work);
1da177e4
LT		 483}
484
c4028958 485static void acm_softint(struct work_struct *work)
1da177e4 486{
c4028958 487 struct acm *acm = container_of(work, struct acm, work);
e5fbab51 488
6aad04f2 489 tty_port_tty_wakeup(&acm->port);
1da177e4
LT		 490}
491
492/*
493 * TTY handlers
494 */
495
7fb57a01 496static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 497{
498 struct acm *acm;
7fb57a01 499 int retval;
1da177e4 500
6cb4f4df 501 acm = acm_get_by_minor(tty->index);
7fb57a01
HS		 502 if (!acm)
503 return -ENODEV;
a5cc7ef9 504
f8a8c10f 505 retval = tty_standard_install(driver, tty);
7fb57a01
HS		 506 if (retval)
507 goto error_init_termios;
10077d4a 508
1da177e4 509 tty->driver_data = acm;
1da177e4 510
7fb57a01
HS		 511 return 0;
512
513error_init_termios:
514 tty_port_put(&acm->port);
515 return retval;
516}
517
518static int acm_tty_open(struct tty_struct *tty, struct file *filp)
519{
520 struct acm *acm = tty->driver_data;
521
7fb57a01
HS		 522 return tty_port_open(&acm->port, tty, filp);
523}
524
0943d8ea
JH		 525static void acm_port_dtr_rts(struct tty_port *port, int raise)
526{
527 struct acm *acm = container_of(port, struct acm, port);
528 int val;
529 int res;
530
531 if (raise)
532 val = ACM_CTRL_DTR | ACM_CTRL_RTS;
533 else
534 val = 0;
535
536 /* FIXME: add missing ctrlout locking throughout driver */
537 acm->ctrlout = val;
538
539 res = acm_set_control(acm, val);
540 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
541 dev_err(&acm->control->dev, "failed to set dtr/rts\n");
542}
543
7fb57a01
HS		 544static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
545{
546 struct acm *acm = container_of(port, struct acm, port);
547 int retval = -ENODEV;
e4c36076 548 int i;
7fb57a01 549
1365baf7 550 mutex_lock(&acm->mutex);
7fb57a01
HS		 551 if (acm->disconnected)
552 goto disconnected;
553
554 retval = usb_autopm_get_interface(acm->control);
555 if (retval)
556 goto error_get_interface;
557
558 /*
559 * FIXME: Why do we need this? Allocating 64K of physically contiguous
560 * memory is really nasty...
561 */
562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
563 acm->control->needs_remote_wakeup = 1;
1365baf7 564
1da177e4 565 acm->ctrlurb->dev = acm->dev;
8727bf68
JH		 566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
567 if (retval) {
a5cc7ef9
JH		 568 dev_err(&acm->control->dev,
569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
7fb57a01 570 goto error_submit_urb;
1da177e4
LT		 571 }
572
24cb4502
JP		 573 acm_tty_set_termios(tty, NULL);
574
6c4707f3
OM		 575 /*
576 * Unthrottle device in case the TTY was closed while throttled.
577 */
578 spin_lock_irq(&acm->read_lock);
579 acm->throttled = 0;
580 acm->throttle_req = 0;
581 spin_unlock_irq(&acm->read_lock);
582
8727bf68
JH		 583 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
584 if (retval)
7fb57a01 585 goto error_submit_read_urbs;
2b626dc1 586
703df329
JH		 587 usb_autopm_put_interface(acm->control);
588
1365baf7 589 mutex_unlock(&acm->mutex);
1da177e4 590
7fb57a01
HS		 591 return 0;
592
593error_submit_read_urbs:
e4c36076
JH		 594 for (i = 0; i < acm->rx_buflimit; i++)
595 usb_kill_urb(acm->read_urbs[i]);
7fb57a01
HS		 596 usb_kill_urb(acm->ctrlurb);
597error_submit_urb:
703df329 598 usb_autopm_put_interface(acm->control);
7fb57a01
HS		 599error_get_interface:
600disconnected:
601 mutex_unlock(&acm->mutex);
8727bf68
JH		 602
603 return usb_translate_errors(retval);
1da177e4
LT		 604}
605
7fb57a01 606static void acm_port_destruct(struct tty_port *port)
83ef344a 607{
7fb57a01
HS		 608 struct acm *acm = container_of(port, struct acm, port);
609
7fb57a01 610 acm_release_minor(acm);
83ef344a 611 usb_put_intf(acm->control);
c4cabd28 612 kfree(acm->country_codes);
83ef344a 613 kfree(acm);
614}
615
7fb57a01 616static void acm_port_shutdown(struct tty_port *port)
10077d4a 617{
7fb57a01 618 struct acm *acm = container_of(port, struct acm, port);
140cb81a
JH		 619 struct urb *urb;
620 struct acm_wb *wb;
dab54c9f 621
b1d42efc
JH		 622 /*
623 * Need to grab write_lock to prevent race with resume, but no need to
624 * hold it due to the tty-port initialised flag.
625 */
626 spin_lock_irq(&acm->write_lock);
627 spin_unlock_irq(&acm->write_lock);
628
629 usb_autopm_get_interface_no_resume(acm->control);
630 acm->control->needs_remote_wakeup = 0;
631 usb_autopm_put_interface(acm->control);
632
89e54e44
JH		 633 for (;;) {
634 urb = usb_get_from_anchor(&acm->delayed);
635 if (!urb)
636 break;
637 wb = urb->context;
638 wb->use = 0;
639 usb_autopm_put_interface_async(acm->control);
10077d4a 640 }
89e54e44 641
ba8c931d 642 acm_kill_urbs(acm);
7fb57a01
HS		 643}
644
645static void acm_tty_cleanup(struct tty_struct *tty)
646{
647 struct acm *acm = tty->driver_data;
ab57f861 648
7fb57a01 649 tty_port_put(&acm->port);
10077d4a
AC		 650}
651
652static void acm_tty_hangup(struct tty_struct *tty)
653{
654 struct acm *acm = tty->driver_data;
ab57f861 655
10077d4a 656 tty_port_hangup(&acm->port);
10077d4a
AC		 657}
658
1da177e4
LT		 659static void acm_tty_close(struct tty_struct *tty, struct file *filp)
660{
661 struct acm *acm = tty->driver_data;
ab57f861 662
7fb57a01 663 tty_port_close(&acm->port, tty, filp);
1da177e4
LT		 664}
665
6e47e069
AC		 666static int acm_tty_write(struct tty_struct *tty,
667 const unsigned char *buf, int count)
1da177e4
LT		 668{
669 struct acm *acm = tty->driver_data;
670 int stat;
884b600f
ON		 671 unsigned long flags;
672 int wbn;
673 struct acm_wb *wb;
674
1da177e4
LT		 675 if (!count)
676 return 0;
677
efbe27b3 678 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count);
a5cc7ef9 679
884b600f 680 spin_lock_irqsave(&acm->write_lock, flags);
6e47e069
AC		 681 wbn = acm_wb_alloc(acm);
682 if (wbn < 0) {
884b600f 683 spin_unlock_irqrestore(&acm->write_lock, flags);
884b600f
ON		 684 return 0;
685 }
686 wb = &acm->wb[wbn];
1da177e4 687
71c2fb03
GKH		 688 if (!acm->dev) {
689 wb->use = 0;
690 spin_unlock_irqrestore(&acm->write_lock, flags);
691 return -ENODEV;
692 }
693
884b600f 694 count = (count > acm->writesize) ? acm->writesize : count;
efbe27b3 695 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count);
884b600f
ON		 696 memcpy(wb->buf, buf, count);
697 wb->len = count;
71c2fb03 698
183a4508
JH		 699 stat = usb_autopm_get_interface_async(acm->control);
700 if (stat) {
701 wb->use = 0;
702 spin_unlock_irqrestore(&acm->write_lock, flags);
703 return stat;
704 }
705
71c2fb03 706 if (acm->susp_count) {
a81cf979
ON		 707 if (acm->putbuffer) {
708 /* now to preserve order */
709 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
710 acm->putbuffer = NULL;
711 }
140cb81a 712 usb_anchor_urb(wb->urb, &acm->delayed);
71c2fb03 713 spin_unlock_irqrestore(&acm->write_lock, flags);
140cb81a 714 return count;
a81cf979
ON		 715 } else {
716 if (acm->putbuffer) {
717 /* at this point there is no good way to handle errors */
718 acm_start_wb(acm, acm->putbuffer);
719 acm->putbuffer = NULL;
720 }
71c2fb03 721 }
71c2fb03
GKH		 722
723 stat = acm_start_wb(acm, wb);
884b600f 724 spin_unlock_irqrestore(&acm->write_lock, flags);
1da177e4 725
6e47e069 726 if (stat < 0)
1da177e4 727 return stat;
1da177e4
LT		 728 return count;
729}
730
a81cf979
ON		 731static void acm_tty_flush_chars(struct tty_struct *tty)
732{
733 struct acm *acm = tty->driver_data;
734 struct acm_wb *cur = acm->putbuffer;
735 int err;
736 unsigned long flags;
737
2a14759a
ON		 738 if (!cur) /* nothing to do */
739 return;
740
a81cf979
ON		 741 acm->putbuffer = NULL;
742 err = usb_autopm_get_interface_async(acm->control);
743 spin_lock_irqsave(&acm->write_lock, flags);
744 if (err < 0) {
745 cur->use = 0;
2a14759a 746 acm->putbuffer = cur;
a81cf979
ON		 747 goto out;
748 }
749
750 if (acm->susp_count)
751 usb_anchor_urb(cur->urb, &acm->delayed);
752 else
753 acm_start_wb(acm, cur);
754out:
755 spin_unlock_irqrestore(&acm->write_lock, flags);
756 return;
757}
758
759static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
760{
761 struct acm *acm = tty->driver_data;
762 struct acm_wb *cur;
763 int wbn;
764 unsigned long flags;
765
766overflow:
767 cur = acm->putbuffer;
768 if (!cur) {
769 spin_lock_irqsave(&acm->write_lock, flags);
770 wbn = acm_wb_alloc(acm);
771 if (wbn >= 0) {
772 cur = &acm->wb[wbn];
773 acm->putbuffer = cur;
774 }
775 spin_unlock_irqrestore(&acm->write_lock, flags);
776 if (!cur)
777 return 0;
778 }
779
780 if (cur->len == acm->writesize) {
781 acm_tty_flush_chars(tty);
782 goto overflow;
783 }
784
785 cur->buf[cur->len++] = ch;
786 return 1;
787}
788
1da177e4
LT		 789static int acm_tty_write_room(struct tty_struct *tty)
790{
791 struct acm *acm = tty->driver_data;
884b600f
ON		 792 /*
793 * Do not let the line discipline to know that we have a reserve,
794 * or it might get too enthusiastic.
795 */
934da463 796 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1da177e4
LT		 797}
798
799static int acm_tty_chars_in_buffer(struct tty_struct *tty)
800{
801 struct acm *acm = tty->driver_data;
7fb57a01
HS		 802 /*
803 * if the device was unplugged then any remaining characters fell out
804 * of the connector ;)
805 */
806 if (acm->disconnected)
23198fda 807 return 0;
884b600f
ON		 808 /*
809 * This is inaccurate (overcounts), but it works.
810 */
86478944 811 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1da177e4
LT		 812}
813
814static void acm_tty_throttle(struct tty_struct *tty)
815{
816 struct acm *acm = tty->driver_data;
088c64f8 817
088c64f8
JH		 818 spin_lock_irq(&acm->read_lock);
819 acm->throttle_req = 1;
820 spin_unlock_irq(&acm->read_lock);
1da177e4
LT		 821}
822
823static void acm_tty_unthrottle(struct tty_struct *tty)
824{
825 struct acm *acm = tty->driver_data;
088c64f8
JH		 826 unsigned int was_throttled;
827
088c64f8
JH		 828 spin_lock_irq(&acm->read_lock);
829 was_throttled = acm->throttled;
830 acm->throttled = 0;
831 acm->throttle_req = 0;
832 spin_unlock_irq(&acm->read_lock);
833
834 if (was_throttled)
835 acm_submit_read_urbs(acm, GFP_KERNEL);
1da177e4
LT		 836}
837
9e98966c 838static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1da177e4
LT		 839{
840 struct acm *acm = tty->driver_data;
9e98966c 841 int retval;
7fb57a01 842
9e98966c
AC		 843 retval = acm_send_break(acm, state ? 0xffff : 0);
844 if (retval < 0)
90744af8
LM		 845 dev_dbg(&acm->control->dev,
846 "%s - send break failed\n", __func__);
9e98966c 847 return retval;
1da177e4
LT		 848}
849
60b33c13 850static int acm_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 851{
852 struct acm *acm = tty->driver_data;
853
1da177e4
LT		 854 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
855 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
856 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
857 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
858 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
859 TIOCM_CTS;
860}
861
20b9d177 862static int acm_tty_tiocmset(struct tty_struct *tty,
1da177e4
LT		 863 unsigned int set, unsigned int clear)
864{
865 struct acm *acm = tty->driver_data;
866 unsigned int newctrl;
867
1da177e4 868 newctrl = acm->ctrlout;
6e47e069
AC		 869 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
870 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
871 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
872 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1da177e4
LT		 873
874 newctrl = (newctrl & ~clear) | set;
875
876 if (acm->ctrlout == newctrl)
877 return 0;
878 return acm_set_control(acm, acm->ctrlout = newctrl);
879}
880
18c75720
ON		 881static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
882{
883 struct serial_struct tmp;
884
18c75720
ON		 885 memset(&tmp, 0, sizeof(tmp));
886 tmp.flags = ASYNC_LOW_LATENCY;
887 tmp.xmit_fifo_size = acm->writesize;
888 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
ba2d8ce9
DW		 889 tmp.close_delay = acm->port.close_delay / 10;
890 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
891 ASYNC_CLOSING_WAIT_NONE :
892 acm->port.closing_wait / 10;
18c75720
ON		 893
894 if (copy_to_user(info, &tmp, sizeof(tmp)))
895 return -EFAULT;
896 else
897 return 0;
898}
899
ba2d8ce9
DW		 900static int set_serial_info(struct acm *acm,
901 struct serial_struct __user *newinfo)
902{
903 struct serial_struct new_serial;
904 unsigned int closing_wait, close_delay;
905 int retval = 0;
906
907 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
908 return -EFAULT;
909
910 close_delay = new_serial.close_delay * 10;
911 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
912 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
913
914 mutex_lock(&acm->port.mutex);
915
916 if (!capable(CAP_SYS_ADMIN)) {
917 if ((close_delay != acm->port.close_delay) ||
918 (closing_wait != acm->port.closing_wait))
919 retval = -EPERM;
920 else
921 retval = -EOPNOTSUPP;
922 } else {
923 acm->port.close_delay = close_delay;
924 acm->port.closing_wait = closing_wait;
925 }
926
927 mutex_unlock(&acm->port.mutex);
928 return retval;
929}
930
5a6a62bd
ON		 931static int wait_serial_change(struct acm *acm, unsigned long arg)
932{
933 int rv = 0;
934 DECLARE_WAITQUEUE(wait, current);
935 struct async_icount old, new;
936
5a6a62bd
ON		 937 do {
938 spin_lock_irq(&acm->read_lock);
939 old = acm->oldcount;
940 new = acm->iocount;
941 acm->oldcount = new;
942 spin_unlock_irq(&acm->read_lock);
943
944 if ((arg & TIOCM_DSR) &&
945 old.dsr != new.dsr)
946 break;
947 if ((arg & TIOCM_CD) &&
948 old.dcd != new.dcd)
949 break;
950 if ((arg & TIOCM_RI) &&
951 old.rng != new.rng)
952 break;
953
954 add_wait_queue(&acm->wioctl, &wait);
955 set_current_state(TASK_INTERRUPTIBLE);
956 schedule();
957 remove_wait_queue(&acm->wioctl, &wait);
958 if (acm->disconnected) {
959 if (arg & TIOCM_CD)
960 break;
961 else
962 rv = -ENODEV;
963 } else {
964 if (signal_pending(current))
965 rv = -ERESTARTSYS;
966 }
967 } while (!rv);
968
969
970
971 return rv;
972}
973
bb2d387c
JH		 974static int acm_tty_get_icount(struct tty_struct *tty,
975 struct serial_icounter_struct *icount)
797ef137 976{
bb2d387c 977 struct acm *acm = tty->driver_data;
797ef137 978
bb2d387c
JH		 979 icount->dsr = acm->iocount.dsr;
980 icount->rng = acm->iocount.rng;
981 icount->dcd = acm->iocount.dcd;
982 icount->frame = acm->iocount.frame;
983 icount->overrun = acm->iocount.overrun;
984 icount->parity = acm->iocount.parity;
985 icount->brk = acm->iocount.brk;
797ef137 986
bb2d387c 987 return 0;
797ef137
ON		 988}
989
6caa76b7 990static int acm_tty_ioctl(struct tty_struct *tty,
6e47e069 991 unsigned int cmd, unsigned long arg)
1da177e4 992{
18c75720
ON		 993 struct acm *acm = tty->driver_data;
994 int rv = -ENOIOCTLCMD;
995
996 switch (cmd) {
997 case TIOCGSERIAL: /* gets serial port data */
998 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
ba2d8ce9
DW		 999 break;
1000 case TIOCSSERIAL:
1001 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
18c75720 1002 break;
5a6a62bd 1003 case TIOCMIWAIT:
8fdbeb26
ON		 1004 rv = usb_autopm_get_interface(acm->control);
1005 if (rv < 0) {
1006 rv = -EIO;
1007 break;
1008 }
5a6a62bd 1009 rv = wait_serial_change(acm, arg);
8fdbeb26 1010 usb_autopm_put_interface(acm->control);
5a6a62bd 1011 break;
18c75720
ON		 1012 }
1013
1014 return rv;
1da177e4
LT		 1015}
1016
6e47e069
AC		 1017static void acm_tty_set_termios(struct tty_struct *tty,
1018 struct ktermios *termios_old)
1da177e4
LT		 1019{
1020 struct acm *acm = tty->driver_data;
adc8d746 1021 struct ktermios *termios = &tty->termios;
1da177e4
LT		 1022 struct usb_cdc_line_coding newline;
1023 int newctrl = acm->ctrlout;
1024
9b80fee1 1025 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1da177e4
LT		 1026 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1027 newline.bParityType = termios->c_cflag & PARENB ?
6e47e069
AC		 1028 (termios->c_cflag & PARODD ? 1 : 2) +
1029 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
301a29da
NB		 1030 switch (termios->c_cflag & CSIZE) {
1031 case CS5:
1032 newline.bDataBits = 5;
1033 break;
1034 case CS6:
1035 newline.bDataBits = 6;
1036 break;
1037 case CS7:
1038 newline.bDataBits = 7;
1039 break;
1040 case CS8:
1041 default:
1042 newline.bDataBits = 8;
1043 break;
1044 }
6e47e069 1045 /* FIXME: Needs to clear unsupported bits in the termios */
1da177e4
LT		 1046 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1047
4473d054 1048 if (C_BAUD(tty) == B0) {
1da177e4
LT		 1049 newline.dwDTERate = acm->line.dwDTERate;
1050 newctrl &= ~ACM_CTRL_DTR;
4473d054 1051 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
6e47e069 1052 newctrl |= ACM_CTRL_DTR;
4473d054 1053 }
1da177e4
LT		 1054
1055 if (newctrl != acm->ctrlout)
1056 acm_set_control(acm, acm->ctrlout = newctrl);
1057
1058 if (memcmp(&acm->line, &newline, sizeof newline)) {
1059 memcpy(&acm->line, &newline, sizeof newline);
a5cc7ef9
JH		 1060 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1061 __func__,
1062 le32_to_cpu(newline.dwDTERate),
1da177e4
LT		 1063 newline.bCharFormat, newline.bParityType,
1064 newline.bDataBits);
1065 acm_set_line(acm, &acm->line);
1066 }
1067}
1068
7fb57a01 1069static const struct tty_port_operations acm_port_ops = {
0943d8ea 1070 .dtr_rts = acm_port_dtr_rts,
7fb57a01
HS		 1071 .shutdown = acm_port_shutdown,
1072 .activate = acm_port_activate,
1073 .destruct = acm_port_destruct,
1074};
1075
1da177e4
LT		 1076/*
1077 * USB probe and disconnect routines.
1078 */
1079
830f4021 1080/* Little helpers: write/read buffers free */
884b600f
ON		 1081static void acm_write_buffers_free(struct acm *acm)
1082{
1083 int i;
1084 struct acm_wb *wb;
1085
6e47e069 1086 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
e4614606 1087 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah);
884b600f
ON		 1088}
1089
830f4021
ON		 1090static void acm_read_buffers_free(struct acm *acm)
1091{
dab54c9f 1092 int i;
830f4021 1093
dab54c9f 1094 for (i = 0; i < acm->rx_buflimit; i++)
e4614606 1095 usb_free_coherent(acm->dev, acm->readsize,
088c64f8 1096 acm->read_buffers[i].base, acm->read_buffers[i].dma);
830f4021
ON		 1097}
1098
884b600f
ON		 1099/* Little helper: write buffers allocate */
1100static int acm_write_buffers_alloc(struct acm *acm)
1101{
1102 int i;
1103 struct acm_wb *wb;
1104
86478944 1105 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
997ea58e 1106 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
884b600f
ON		 1107 &wb->dmah);
1108 if (!wb->buf) {
1109 while (i != 0) {
1110 --i;
1111 --wb;
997ea58e 1112 usb_free_coherent(acm->dev, acm->writesize,
884b600f
ON		 1113 wb->buf, wb->dmah);
1114 }
1115 return -ENOMEM;
1116 }
1117 }
1118 return 0;
1119}
1120
10077d4a
AC		 1121static int acm_probe(struct usb_interface *intf,
1122 const struct usb_device_id *id)
1da177e4
LT		 1123{
1124 struct usb_cdc_union_desc *union_header = NULL;
cb42b63d 1125 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
c6dbf554 1126 unsigned char *buffer = intf->altsetting->extra;
1da177e4
LT		 1127 int buflen = intf->altsetting->extralen;
1128 struct usb_interface *control_interface;
1129 struct usb_interface *data_interface;
a2bfb4a3
ON		 1130 struct usb_endpoint_descriptor *epctrl = NULL;
1131 struct usb_endpoint_descriptor *epread = NULL;
1132 struct usb_endpoint_descriptor *epwrite = NULL;
1da177e4 1133 struct usb_device *usb_dev = interface_to_usbdev(intf);
cb42b63d 1134 struct usb_cdc_parsed_header h;
1da177e4
LT		 1135 struct acm *acm;
1136 int minor;
6e47e069 1137 int ctrlsize, readsize;
1da177e4 1138 u8 *buf;
cb42b63d
ON		 1139 int call_intf_num = -1;
1140 int data_intf_num = -1;
1da177e4 1141 unsigned long quirks;
86478944 1142 int num_rx_buf;
61a87adf 1143 int i;
a2bfb4a3 1144 int combined_interfaces = 0;
c93d8195
AK		 1145 struct device *tty_dev;
1146 int rv = -ENOMEM;
1da177e4 1147
86478944 1148 /* normal quirks */
1da177e4 1149 quirks = (unsigned long)id->driver_info;
16142655
DT		 1150
1151 if (quirks == IGNORE_DEVICE)
1152 return -ENODEV;
1153
7309aa84
ON		 1154 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header));
1155
86478944
ON		 1156 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1157
1158 /* handle quirks deadly to normal probing*/
1da177e4
LT		 1159 if (quirks == NO_UNION_NORMAL) {
1160 data_interface = usb_ifnum_to_if(usb_dev, 1);
1161 control_interface = usb_ifnum_to_if(usb_dev, 0);
8835ba4a
ON		 1162 /* we would crash */
1163 if (!data_interface || !control_interface)
1164 return -ENODEV;
1da177e4
LT		 1165 goto skip_normal_probe;
1166 }
6e47e069 1167
1da177e4
LT		 1168 /* normal probing*/
1169 if (!buffer) {
9908a32e 1170 dev_err(&intf->dev, "Weird descriptor references\n");
1da177e4
LT		 1171 return -EINVAL;
1172 }
1173
2ad9d544
ON		 1174 if (!intf->cur_altsetting)
1175 return -EINVAL;
1176
1da177e4 1177 if (!buflen) {
577045c0
TG		 1178 if (intf->cur_altsetting->endpoint &&
1179 intf->cur_altsetting->endpoint->extralen &&
6e47e069
AC		 1180 intf->cur_altsetting->endpoint->extra) {
1181 dev_dbg(&intf->dev,
1182 "Seeking extra descriptors on endpoint\n");
1da177e4
LT		 1183 buflen = intf->cur_altsetting->endpoint->extralen;
1184 buffer = intf->cur_altsetting->endpoint->extra;
1185 } else {
9908a32e
GKH		 1186 dev_err(&intf->dev,
1187 "Zero length descriptor references\n");
1da177e4
LT		 1188 return -EINVAL;
1189 }
1190 }
1191
cb42b63d
ON		 1192 cdc_parse_cdc_header(&h, intf, buffer, buflen);
1193 union_header = h.usb_cdc_union_desc;
1194 cmgmd = h.usb_cdc_call_mgmt_descriptor;
1195 if (cmgmd)
1196 call_intf_num = cmgmd->bDataInterface;
1da177e4
LT		 1197
1198 if (!union_header) {
cb42b63d 1199 if (call_intf_num > 0) {
6e47e069 1200 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
fd5054c1 1201 /* quirks for Droids MuIn LCD */
cb42b63d 1202 if (quirks & NO_DATA_INTERFACE) {
fd5054c1 1203 data_interface = usb_ifnum_to_if(usb_dev, 0);
cb42b63d
ON		 1204 } else {
1205 data_intf_num = call_intf_num;
1206 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
1207 }
1da177e4
LT		 1208 control_interface = intf;
1209 } else {
a2bfb4a3
ON		 1210 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1211 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1212 return -ENODEV;
1213 } else {
1214 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1215 combined_interfaces = 1;
1216 control_interface = data_interface = intf;
1217 goto look_for_collapsed_interface;
1218 }
1da177e4
LT		 1219 }
1220 } else {
cb42b63d 1221 data_intf_num = union_header->bSlaveInterface0;
1da177e4 1222 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
cb42b63d 1223 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
403dff4e
GKH		 1224 }
1225
1226 if (!control_interface || !data_interface) {
1227 dev_dbg(&intf->dev, "no interfaces\n");
1228 return -ENODEV;
1da177e4 1229 }
2ad9d544
ON		 1230 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
1231 return -ENODEV;
6e47e069 1232
cb42b63d 1233 if (data_intf_num != call_intf_num)
6e47e069 1234 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1da177e4 1235
a2bfb4a3
ON		 1236 if (control_interface == data_interface) {
1237 /* some broken devices designed for windows work this way */
1238 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1239 combined_interfaces = 1;
1240 /* a popular other OS doesn't use it */
1241 quirks |= NO_CAP_LINE;
1242 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1243 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1244 return -EINVAL;
1245 }
1246look_for_collapsed_interface:
1247 for (i = 0; i < 3; i++) {
1248 struct usb_endpoint_descriptor *ep;
1249 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1250
1251 if (usb_endpoint_is_int_in(ep))
1252 epctrl = ep;
1253 else if (usb_endpoint_is_bulk_out(ep))
1254 epwrite = ep;
1255 else if (usb_endpoint_is_bulk_in(ep))
1256 epread = ep;
1257 else
1258 return -EINVAL;
1259 }
1260 if (!epctrl || !epread || !epwrite)
1261 return -ENODEV;
1262 else
1263 goto made_compressed_probe;
1264 }
1265
1da177e4
LT		 1266skip_normal_probe:
1267
1268 /*workaround for switched interfaces */
6e47e069
AC		 1269 if (data_interface->cur_altsetting->desc.bInterfaceClass
1270 != CDC_DATA_INTERFACE_TYPE) {
1271 if (control_interface->cur_altsetting->desc.bInterfaceClass
1272 == CDC_DATA_INTERFACE_TYPE) {
6e47e069
AC		 1273 dev_dbg(&intf->dev,
1274 "Your device has switched interfaces.\n");
2cfef79d 1275 swap(control_interface, data_interface);
1da177e4
LT		 1276 } else {
1277 return -EINVAL;
1278 }
1279 }
74da5d68
AS		 1280
1281 /* Accept probe requests only for the control interface */
a2bfb4a3 1282 if (!combined_interfaces && intf != control_interface)
74da5d68 1283 return -ENODEV;
6e47e069 1284
a2bfb4a3
ON		 1285 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1286 /* valid in this context */
6e47e069 1287 dev_dbg(&intf->dev, "The data interface isn't available\n");
1da177e4
LT		 1288 return -EBUSY;
1289 }
1290
1291
99f347ca
SS		 1292 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1293 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1da177e4
LT		 1294 return -EINVAL;
1295
1296 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1297 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1298 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1299
1300
1301 /* workaround for switched endpoints */
45aea704 1302 if (!usb_endpoint_dir_in(epread)) {
1da177e4 1303 /* descriptors are swapped */
6e47e069
AC		 1304 dev_dbg(&intf->dev,
1305 "The data interface has switched endpoints\n");
2cfef79d 1306 swap(epread, epwrite);
1da177e4 1307 }
a2bfb4a3 1308made_compressed_probe:
a5cc7ef9 1309 dev_dbg(&intf->dev, "interfaces are valid\n");
1da177e4 1310
6e47e069 1311 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
17136d49 1312 if (acm == NULL)
1da177e4 1313 goto alloc_fail;
1da177e4 1314
7fb57a01 1315 minor = acm_alloc_minor(acm);
6dd3587f
ON		 1316 if (minor < 0)
1317 goto alloc_fail1;
7fb57a01 1318
29cc8897
KM		 1319 ctrlsize = usb_endpoint_maxp(epctrl);
1320 readsize = usb_endpoint_maxp(epread) *
6e47e069 1321 (quirks == SINGLE_RX_URB ? 1 : 2);
a2bfb4a3 1322 acm->combined_interfaces = combined_interfaces;
29cc8897 1323 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1da177e4
LT		 1324 acm->control = control_interface;
1325 acm->data = data_interface;
1326 acm->minor = minor;
1327 acm->dev = usb_dev;
cb42b63d
ON		 1328 if (h.usb_cdc_acm_descriptor)
1329 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
a2bfb4a3
ON		 1330 if (quirks & NO_CAP_LINE)
1331 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1da177e4
LT		 1332 acm->ctrlsize = ctrlsize;
1333 acm->readsize = readsize;
86478944 1334 acm->rx_buflimit = num_rx_buf;
c4028958 1335 INIT_WORK(&acm->work, acm_softint);
5a6a62bd 1336 init_waitqueue_head(&acm->wioctl);
884b600f 1337 spin_lock_init(&acm->write_lock);
61a87adf 1338 spin_lock_init(&acm->read_lock);
1365baf7 1339 mutex_init(&acm->mutex);
cf7fdd57
ON		 1340 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1341 if (acm->is_int_ep)
1342 acm->bInterval = epread->bInterval;
739e0285
AC		 1343 tty_port_init(&acm->port);
1344 acm->port.ops = &acm_port_ops;
140cb81a 1345 init_usb_anchor(&acm->delayed);
2a8cdfde 1346 acm->quirks = quirks;
1da177e4 1347
997ea58e 1348 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
17136d49 1349 if (!buf)
1da177e4 1350 goto alloc_fail2;
1da177e4
LT		 1351 acm->ctrl_buffer = buf;
1352
17136d49 1353 if (acm_write_buffers_alloc(acm) < 0)
1da177e4 1354 goto alloc_fail4;
1da177e4
LT		 1355
1356 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1357 if (!acm->ctrlurb)
1da177e4 1358 goto alloc_fail5;
17136d49 1359
86478944 1360 for (i = 0; i < num_rx_buf; i++) {
088c64f8
JH		 1361 struct acm_rb *rb = &(acm->read_buffers[i]);
1362 struct urb *urb;
61a87adf 1363
74f5e1ba
JH		 1364 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1365 &rb->dma);
17136d49 1366 if (!rb->base)
74f5e1ba 1367 goto alloc_fail6;
088c64f8
JH		 1368 rb->index = i;
1369 rb->instance = acm;
74f5e1ba 1370
088c64f8 1371 urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1372 if (!urb)
c2572b78 1373 goto alloc_fail6;
17136d49 1374
088c64f8
JH		 1375 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1376 urb->transfer_dma = rb->dma;
1377 if (acm->is_int_ep) {
1378 usb_fill_int_urb(urb, acm->dev,
add12505 1379 usb_rcvintpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1380 rb->base,
1381 acm->readsize,
1382 acm_read_bulk_callback, rb,
1383 acm->bInterval);
1384 } else {
1385 usb_fill_bulk_urb(urb, acm->dev,
add12505 1386 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress),
088c64f8
JH		 1387 rb->base,
1388 acm->readsize,
1389 acm_read_bulk_callback, rb);
1390 }
61a87adf 1391
088c64f8
JH		 1392 acm->read_urbs[i] = urb;
1393 __set_bit(i, &acm->read_urbs_free);
61a87adf 1394 }
6e47e069 1395 for (i = 0; i < ACM_NW; i++) {
e4cf3aa8
DE		 1396 struct acm_wb *snd = &(acm->wb[i]);
1397
6e47e069 1398 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
17136d49 1399 if (snd->urb == NULL)
74f5e1ba 1400 goto alloc_fail7;
e4cf3aa8 1401
5186ffee
AL		 1402 if (usb_endpoint_xfer_int(epwrite))
1403 usb_fill_int_urb(snd->urb, usb_dev,
c5211187 1404 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
5186ffee
AL		 1405 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1406 else
1407 usb_fill_bulk_urb(snd->urb, usb_dev,
1408 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1409 NULL, acm->writesize, acm_write_bulk, snd);
e4cf3aa8 1410 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
ffdb1e36
LB		 1411 if (quirks & SEND_ZERO_PACKET)
1412 snd->urb->transfer_flags |= URB_ZERO_PACKET;
e4cf3aa8 1413 snd->instance = acm;
1da177e4
LT		 1414 }
1415
6e47e069 1416 usb_set_intfdata(intf, acm);
c4cabd28
ON		 1417
1418 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1419 if (i < 0)
74f5e1ba 1420 goto alloc_fail7;
c4cabd28 1421
cb42b63d
ON		 1422 if (h.usb_cdc_country_functional_desc) { /* export the country data */
1423 struct usb_cdc_country_functional_desc * cfd =
1424 h.usb_cdc_country_functional_desc;
1425
c4cabd28
ON		 1426 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1427 if (!acm->country_codes)
1428 goto skip_countries;
1429 acm->country_code_size = cfd->bLength - 4;
6e47e069
AC		 1430 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1431 cfd->bLength - 4);
c4cabd28
ON		 1432 acm->country_rel_date = cfd->iCountryCodeRelDate;
1433
1434 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1435 if (i < 0) {
1436 kfree(acm->country_codes);
e7c8e860
JL		 1437 acm->country_codes = NULL;
1438 acm->country_code_size = 0;
c4cabd28
ON		 1439 goto skip_countries;
1440 }
1441
6e47e069
AC		 1442 i = device_create_file(&intf->dev,
1443 &dev_attr_iCountryCodeRelDate);
c4cabd28 1444 if (i < 0) {
c2572b78 1445 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
c4cabd28 1446 kfree(acm->country_codes);
e7c8e860
JL		 1447 acm->country_codes = NULL;
1448 acm->country_code_size = 0;
c4cabd28
ON		 1449 goto skip_countries;
1450 }
1451 }
1452
1453skip_countries:
6e47e069 1454 usb_fill_int_urb(acm->ctrlurb, usb_dev,
a2bfb4a3
ON		 1455 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1456 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1457 /* works around buggy devices */
d102e78f 1458 epctrl->bInterval ? epctrl->bInterval : 16);
1da177e4
LT		 1459 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1460 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1461
1da177e4
LT		 1462 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1463
1da177e4
LT		 1464 acm->line.dwDTERate = cpu_to_le32(9600);
1465 acm->line.bDataBits = 8;
1466 acm_set_line(acm, &acm->line);
1467
1468 usb_driver_claim_interface(&acm_driver, data_interface, acm);
672c4e18 1469 usb_set_intfdata(data_interface, acm);
1da177e4 1470
83ef344a 1471 usb_get_intf(control_interface);
c93d8195 1472 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
734cc178 1473 &control_interface->dev);
c93d8195
AK		 1474 if (IS_ERR(tty_dev)) {
1475 rv = PTR_ERR(tty_dev);
1476 goto alloc_fail8;
1477 }
1da177e4 1478
15bf722e
AS		 1479 if (quirks & CLEAR_HALT_CONDITIONS) {
1480 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1481 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1482 }
1483
c4cabd28 1484 return 0;
c93d8195
AK		 1485alloc_fail8:
1486 if (acm->country_codes) {
1487 device_remove_file(&acm->control->dev,
1488 &dev_attr_wCountryCodes);
1489 device_remove_file(&acm->control->dev,
1490 &dev_attr_iCountryCodeRelDate);
d908f847 1491 kfree(acm->country_codes);
c93d8195
AK		 1492 }
1493 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
74f5e1ba 1494alloc_fail7:
c93d8195 1495 usb_set_intfdata(intf, NULL);
e4cf3aa8
DE		 1496 for (i = 0; i < ACM_NW; i++)
1497 usb_free_urb(acm->wb[i].urb);
c2572b78 1498alloc_fail6:
86478944 1499 for (i = 0; i < num_rx_buf; i++)
088c64f8 1500 usb_free_urb(acm->read_urbs[i]);
74f5e1ba 1501 acm_read_buffers_free(acm);
1da177e4
LT		 1502 usb_free_urb(acm->ctrlurb);
1503alloc_fail5:
884b600f 1504 acm_write_buffers_free(acm);
1da177e4 1505alloc_fail4:
997ea58e 1506 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1da177e4 1507alloc_fail2:
7fb57a01 1508 acm_release_minor(acm);
6dd3587f 1509alloc_fail1:
1da177e4
LT		 1510 kfree(acm);
1511alloc_fail:
c93d8195 1512 return rv;
1da177e4
LT		 1513}
1514
1515static void acm_disconnect(struct usb_interface *intf)
1516{
c4cabd28 1517 struct acm *acm = usb_get_intfdata(intf);
10077d4a 1518 struct tty_struct *tty;
7fb57a01 1519
672c4e18
DB		 1520 /* sibling interface is already cleaning up */
1521 if (!acm)
86067eea 1522 return;
672c4e18 1523
7fb57a01
HS		 1524 mutex_lock(&acm->mutex);
1525 acm->disconnected = true;
6e47e069 1526 if (acm->country_codes) {
74da5d68
AS		 1527 device_remove_file(&acm->control->dev,
1528 &dev_attr_wCountryCodes);
1529 device_remove_file(&acm->control->dev,
1530 &dev_attr_iCountryCodeRelDate);
c4cabd28 1531 }
5a6a62bd 1532 wake_up_all(&acm->wioctl);
74da5d68 1533 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
86067eea
ON		 1534 usb_set_intfdata(acm->control, NULL);
1535 usb_set_intfdata(acm->data, NULL);
7fb57a01
HS		 1536 mutex_unlock(&acm->mutex);
1537
1538 tty = tty_port_tty_get(&acm->port);
1539 if (tty) {
1540 tty_vhangup(tty);
1541 tty_kref_put(tty);
1542 }
1da177e4 1543
ba8c931d
LM		 1544 acm_kill_urbs(acm);
1545 cancel_work_sync(&acm->work);
1da177e4 1546
cb25505f
JH		 1547 tty_unregister_device(acm_tty_driver, acm->minor);
1548
884b600f 1549 acm_write_buffers_free(acm);
e4614606 1550 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
830f4021 1551 acm_read_buffers_free(acm);
1da177e4 1552
a2bfb4a3
ON		 1553 if (!acm->combined_interfaces)
1554 usb_driver_release_interface(&acm_driver, intf == acm->control ?
830f4021 1555 acm->data : acm->control);
1da177e4 1556
7fb57a01 1557 tty_port_put(&acm->port);
1da177e4
LT		 1558}
1559
35758589 1560#ifdef CONFIG_PM
1365baf7
ON		 1561static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1562{
1563 struct acm *acm = usb_get_intfdata(intf);
11ea859d
ON		 1564 int cnt;
1565
bbf0cb3e 1566 spin_lock_irq(&acm->write_lock);
5b1b0b81 1567 if (PMSG_IS_AUTO(message)) {
5a345c20 1568 if (acm->transmitting) {
bbf0cb3e 1569 spin_unlock_irq(&acm->write_lock);
11ea859d 1570 return -EBUSY;
5a345c20 1571 }
11ea859d 1572 }
11ea859d 1573 cnt = acm->susp_count++;
bbf0cb3e 1574 spin_unlock_irq(&acm->write_lock);
1365baf7 1575
11ea859d 1576 if (cnt)
1365baf7 1577 return 0;
1365baf7 1578
ba8c931d
LM		 1579 acm_kill_urbs(acm);
1580 cancel_work_sync(&acm->work);
1365baf7 1581
1365baf7
ON		 1582 return 0;
1583}
1584
1585static int acm_resume(struct usb_interface *intf)
1586{
1587 struct acm *acm = usb_get_intfdata(intf);
140cb81a 1588 struct urb *urb;
1365baf7
ON		 1589 int rv = 0;
1590
bbf0cb3e 1591 spin_lock_irq(&acm->write_lock);
11ea859d 1592
e144ed28
JH		 1593 if (--acm->susp_count)
1594 goto out;
1365baf7 1595
d41861ca 1596 if (tty_port_initialized(&acm->port)) {
e144ed28 1597 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
97d35f95 1598
140cb81a
JH		 1599 for (;;) {
1600 urb = usb_get_from_anchor(&acm->delayed);
1601 if (!urb)
1602 break;
1603
1604 acm_start_wb(acm, urb->context);
97d35f95
ON		 1605 }
1606
1607 /*
1608 * delayed error checking because we must
1609 * do the write path at all cost
1610 */
1365baf7 1611 if (rv < 0)
e144ed28 1612 goto out;
1365baf7 1613
e144ed28 1614 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1365baf7 1615 }
e144ed28 1616out:
bbf0cb3e 1617 spin_unlock_irq(&acm->write_lock);
1365baf7 1618
1365baf7
ON		 1619 return rv;
1620}
35758589 1621
a91b0c50
FL		 1622static int acm_reset_resume(struct usb_interface *intf)
1623{
1624 struct acm *acm = usb_get_intfdata(intf);
a91b0c50 1625
d41861ca 1626 if (tty_port_initialized(&acm->port))
aa27a094 1627 tty_port_tty_hangup(&acm->port, false);
7fb57a01 1628
a91b0c50
FL		 1629 return acm_resume(intf);
1630}
1631
35758589 1632#endif /* CONFIG_PM */
c1479a92
AT		 1633
1634#define NOKIA_PCSUITE_ACM_INFO(x) \
1635 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1636 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1637 USB_CDC_ACM_PROTO_VENDOR)
1638
4035e456
TG		 1639#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1640 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1641 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1642 USB_CDC_ACM_PROTO_VENDOR)
1643
1da177e4
LT		 1644/*
1645 * USB driver structure.
1646 */
1647
6ef4852b 1648static const struct usb_device_id acm_ids[] = {
1da177e4 1649 /* quirky and broken devices */
b20b1618
BG		 1650 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1651 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
3b59d16c
DC		 1652 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1653 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1da177e4
LT		 1654 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1655 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1656 },
b0e2a705
AA		 1657 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1659 },
0f9c7b4a
AL		 1660 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1662 },
8753e65e
MO		 1663 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1665 },
91a9c921
CM		 1666 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1668 },
7abcf20b
AC		 1669 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1670 .driver_info = SINGLE_RX_URB,
1671 },
86478944
ON		 1672 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1673 .driver_info = SINGLE_RX_URB, /* firmware bug */
1674 },
3dd2ae81
ON		 1675 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1676 .driver_info = SINGLE_RX_URB, /* firmware bug */
1677 },
9be8456c
ON		 1678 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1680 },
6149ed5e
IM		 1681 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1683 },
c8fd2c37
ES		 1684 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1685 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1686 },
c89c60e9
AC		 1687 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1688 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1689 },
cab98a0a
XK		 1690 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1692 },
2a8cdfde
JH		 1693 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1694 .driver_info = QUIRK_CONTROL_LINE_STATE, },
cf84a691 1695 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
155df65a
DT		 1696 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1697 },
6abff5dc
KH		 1698 /* Motorola H24 HSPA module: */
1699 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
895d240d
MU		 1700 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1701 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1702 },
1703 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1704 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1705 },
1706 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1707 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1708 },
1709 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1710 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1711 },
1712 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1713 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1714 },
1715 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1716 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1717 },
1718 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1720 },
6abff5dc 1721
c332b4e1
AR		 1722 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1723 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1724 data interface instead of
1725 communications interface.
1726 Maybe we should define a new
1727 quirk for this. */
1728 },
e7d491a1
JCR		 1729 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1730 .driver_info = NO_UNION_NORMAL,
1731 },
036915a7
DL		 1732 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1733 .driver_info = NO_UNION_NORMAL,
1734 },
1f17c502
KK		 1735 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1736 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1737 },
c3baa19b
RN		 1738 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1739 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1740 },
9be8456c 1741
15bf722e
AS		 1742 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1743 .driver_info = CLEAR_HALT_CONDITIONS,
1744 },
1745
c1479a92
AT		 1746 /* Nokia S60 phones expose two ACM channels. The first is
1747 * a modem and is picked up by the standard AT-command
1748 * information below. The second is 'vendor-specific' but
1749 * is treated as a serial device at the S60 end, so we want
1750 * to expose it on Linux too. */
1751 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1752 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1753 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1754 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1755 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1756 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1757 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1758 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1759 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1760 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1761 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1762 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1763 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1764 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1765 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1766 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1767 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1768 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1769 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1770 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1771 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1772 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1773 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1774 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1775 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1776 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1777 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1778 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1779 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1780 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1781 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1782 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1783 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1784 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1785 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1786 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1787 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1788 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1789 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1790 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1791 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1792 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1793 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
83a4eae9 1794 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
4035e456
TG		 1795 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1796 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1797 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1798 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1799 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1800 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1801 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1802 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1803 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1804 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
721d92fc 1805 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
4061fde2
TG		 1806 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1807 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
4035e456 1808 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
c1479a92 1809
65e52f41
DP		 1810 /* Support for Owen devices */
1811 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1812
c1479a92
AT		 1813 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1814
fd5054c1
ES		 1815 /* Support for Droids MuIn LCD */
1816 { USB_DEVICE(0x04d8, 0x000b),
1817 .driver_info = NO_DATA_INTERFACE,
1818 },
1819
16142655
DT		 1820#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1821 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
1822 .driver_info = IGNORE_DEVICE,
1823 },
1824 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
1825 .driver_info = IGNORE_DEVICE,
1826 },
1827#endif
1828
e912e685
ON		 1829 /*Samsung phone in firmware update mode */
1830 { USB_DEVICE(0x04e8, 0x685d),
1831 .driver_info = IGNORE_DEVICE,
1832 },
1833
f33a7f72
JJ		 1834 /* Exclude Infineon Flash Loader utility */
1835 { USB_DEVICE(0x058b, 0x0041),
1836 .driver_info = IGNORE_DEVICE,
1837 },
1838
5b239f0a
PC		 1839 /* control interfaces without any protocol set */
1840 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1841 USB_CDC_PROTO_NONE) },
1842
1da177e4
LT		 1843 /* control interfaces with various AT-command sets */
1844 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1845 USB_CDC_ACM_PROTO_AT_V25TER) },
1846 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1847 USB_CDC_ACM_PROTO_AT_PCCA101) },
1848 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1849 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1850 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1851 USB_CDC_ACM_PROTO_AT_GSM) },
1852 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
6e47e069 1853 USB_CDC_ACM_PROTO_AT_3G) },
1da177e4
LT		 1854 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1855 USB_CDC_ACM_PROTO_AT_CDMA) },
1856
ffdb1e36
LB		 1857 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1858 .driver_info = SEND_ZERO_PACKET,
1859 },
1860
1da177e4
LT		 1861 { }
1862};
1863
6e47e069 1864MODULE_DEVICE_TABLE(usb, acm_ids);
1da177e4
LT		 1865
1866static struct usb_driver acm_driver = {
1da177e4
LT		 1867 .name = "cdc_acm",
1868 .probe = acm_probe,
1869 .disconnect = acm_disconnect,
35758589 1870#ifdef CONFIG_PM
1365baf7
ON		 1871 .suspend = acm_suspend,
1872 .resume = acm_resume,
a91b0c50 1873 .reset_resume = acm_reset_resume,
35758589 1874#endif
1da177e4 1875 .id_table = acm_ids,
35758589 1876#ifdef CONFIG_PM
1365baf7 1877 .supports_autosuspend = 1,
35758589 1878#endif
e1f12eb6 1879 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1880};
1881
1882/*
1883 * TTY driver structures.
1884 */
1885
b68e31d0 1886static const struct tty_operations acm_ops = {
7fb57a01 1887 .install = acm_tty_install,
1da177e4
LT		 1888 .open = acm_tty_open,
1889 .close = acm_tty_close,
7fb57a01 1890 .cleanup = acm_tty_cleanup,
10077d4a 1891 .hangup = acm_tty_hangup,
1da177e4 1892 .write = acm_tty_write,
a81cf979
ON		 1893 .put_char = acm_tty_put_char,
1894 .flush_chars = acm_tty_flush_chars,
1da177e4
LT		 1895 .write_room = acm_tty_write_room,
1896 .ioctl = acm_tty_ioctl,
1897 .throttle = acm_tty_throttle,
1898 .unthrottle = acm_tty_unthrottle,
1899 .chars_in_buffer = acm_tty_chars_in_buffer,
1900 .break_ctl = acm_tty_break_ctl,
1901 .set_termios = acm_tty_set_termios,
1902 .tiocmget = acm_tty_tiocmget,
1903 .tiocmset = acm_tty_tiocmset,
bb2d387c 1904 .get_icount = acm_tty_get_icount,
1da177e4
LT		 1905};
1906
1907/*
1908 * Init / exit.
1909 */
1910
1911static int __init acm_init(void)
1912{
1913 int retval;
1914 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1915 if (!acm_tty_driver)
1916 return -ENOMEM;
1da177e4
LT		 1917 acm_tty_driver->driver_name = "acm",
1918 acm_tty_driver->name = "ttyACM",
1da177e4
LT		 1919 acm_tty_driver->major = ACM_TTY_MAJOR,
1920 acm_tty_driver->minor_start = 0,
1921 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1922 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
331b8319 1923 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4 1924 acm_tty_driver->init_termios = tty_std_termios;
6e47e069
AC		 1925 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1926 HUPCL | CLOCAL;
1da177e4
LT		 1927 tty_set_operations(acm_tty_driver, &acm_ops);
1928
1929 retval = tty_register_driver(acm_tty_driver);
1930 if (retval) {
1931 put_tty_driver(acm_tty_driver);
1932 return retval;
1933 }
1934
1935 retval = usb_register(&acm_driver);
1936 if (retval) {
1937 tty_unregister_driver(acm_tty_driver);
1938 put_tty_driver(acm_tty_driver);
1939 return retval;
1940 }
1941
a2c7b935 1942 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 1943
1944 return 0;
1945}
1946
1947static void __exit acm_exit(void)
1948{
1949 usb_deregister(&acm_driver);
1950 tty_unregister_driver(acm_tty_driver);
1951 put_tty_driver(acm_tty_driver);
91b72560 1952 idr_destroy(&acm_minors);
1da177e4
LT		 1953}
1954
1955module_init(acm_init);
1956module_exit(acm_exit);
1957
6e47e069
AC		 1958MODULE_AUTHOR(DRIVER_AUTHOR);
1959MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4 1960MODULE_LICENSE("GPL");
e766aeb8 1961MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
Linux 6.x block layer and io_uring tree(s)